CN201943651U - Testing device for mechanical parameters of underground compression packer - Google Patents

Abstract

The utility model relates to the technical field of a tool for measuring the mechanical parameters of a rubber cylinder system of a downhole packer used in petroleum development, and relates to a mechanical parameter testing device for a downhole compression packer of a packer. The packer downhole compression packer mechanical parameter testing device includes casing, upper head, lower head, packer, radial stress sensor and axial stress sensor; the packer with seal assembly It is installed in the inner cavity of the casing; a radial stress sensor is installed outside the casing, and an axial stress sensor is installed on the packer. The utility model has a reasonable and compact structure and is convenient to use. By using the method, the axial load, the frictional force, the compression deformation of each rubber tube during the working process of the packer can be effectively and accurately measured in real time, and the impact on the inside of the casing can be measured. Multiple parameters such as the contact pressure of the wall, and can ensure that the signal output wires of each sensor are not damaged, greatly reducing the cost of testing and testing, and can provide a reliable basis for the design and improvement of the packer.

Description

Packer Downhole Compression Packer Mechanical Parameter Testing Device

technical field

The utility model relates to the technical field of a tool for measuring the mechanical parameters of a rubber cylinder system of a downhole packer used in petroleum development, and relates to a mechanical parameter testing device for a downhole compression packer of a packer.

Background technique

In oilfield development, the packer is one of the main downhole tools for the injection and production operations such as layered oil production, layered water injection, layered fracturing or acidification, mechanical plugging of water, etc. The key component of the reliable sealing of the spacer. The packer is located between the tubing and the casing. When the packer rubber sleeve system bears an axial load, the rubber sleeve will undergo a large deformation, contact the inner wall of the casing and generate contact pressure, and make the ring between the casing and the tubing The space is cut off to form a seal. The packer rubber cartridge system is composed of several parts such as several rubber cartridges, a spacer ring and a central liner (oil pipe). The sealing effect of the rubber cartridge system is the result of the joint action of all the parts in the system.

In the current measurement and research of the working parameters of the downhole compression packer rubber sleeve system, the main focus is on the measurement and research of the contact pressure between the rubber sleeve and the inner wall of the casing, and some laws of the contact pressure distribution between the rubber sleeve and the casing are obtained. However, the distribution of the contact pressure between the rubber sleeve and the inner wall of the casing is related to many factors such as the axial load, the structure of the rubber sleeve system, the geometric dimensions of each part, and even the physical, chemical and mechanical properties of the rubber sleeve material, so even if it can be accurately It is also difficult to quantitatively determine the effect of various mechanical parameters in the rubber cartridge system on the isolation by measuring the distribution law of the contact pressure between the rubber cartridge and the casing. Therefore, in order to optimize the design of the packer rubber cartridge system, it is also necessary to understand and measure the change law of the axial load and compression of each rubber cartridge of the packer.

Contents of the invention

The utility model provides a mechanical parameter testing device of a downhole compression packer, which overcomes the deficiencies of the prior art and can effectively measure the axial loads on each rubber cylinder of the rubber cylinder system of the downhole packer. Real-time measurement of mechanical parameters such as friction force, compression deformation and contact pressure on the inner wall of the casing.

One of the technical solutions of the utility model is achieved by the following measures: a packer downhole compression packer mechanical parameter testing device includes casing, upper head, lower head, packer, radial stress sensor and axial stress sensor; the upper end of the casing is fixedly installed with an upper head, and the lower end of the casing is fixedly installed with a lower head. The lower head hole of the inner cavity of the casing; the packer with the seal assembly is installed in the inner cavity of the casing, the upper part of the packer is set in the upper head hole and can move up and down, the lower part of the packer Set in the lower head hole and can move up and down, the elastic seal assembly can reduce in height and increase in outer diameter due to the downward extrusion of the packer, and can return to its original shape due to the upward movement of the packer; There is no less than one radial stress sensor installed on the outside of the casing that can detect the radial thrust of the seal assembly on the casing, and no less than one radial stress sensor that can detect the axial thrust of the seal assembly on the packer. Axial stress sensor for pressure.

Below is the further optimization or/and improvement to above-mentioned utility model technical scheme:

The above-mentioned packer may include a support tube, a reducing joint, a rubber tube liner, a core tube connector, a center tube, an upper rubber tube support, a lower rubber tube support and a bushing; the upper part of the support tube is set on the upper head The lower end of the support tube is fixedly connected with the upper end of the variable diameter joint, the lower end of the variable diameter joint is fixedly connected with the upper end of the rubber tube liner, and the lower end of the rubber tube liner is connected with the core tube connector. The upper end of the core tube is fixedly connected together, the lower end of the core tube connector is fixedly connected with the upper end of the center tube, the lower part of the center tube is set in the lower head hole and can move up and down; the outer part of the rubber tube liner is set in order from top to bottom There are upper rubber tube support, seal assembly and lower rubber tube support. On the lower end, the upper end of the lower rubber cylinder support is tightly pressed against the lower end of the seal assembly and can move up and down due to the axial compression or restoration of the seal assembly. The outer sides of the upper rubber cylinder support and the lower rubber cylinder support Axial stress sensors are respectively fixed; there is a bushing in the inner cavity of the sleeve between the lower end of the lower rubber tube support and the upper end of the lower head, and the lower part of the rubber tube liner and the connecting head of the core tube are located in the inner cavity of the bushing And can move up and down.

A displacement detection device capable of detecting the axial compression deformation of the seal assembly can be installed on the above packer. The displacement detection device can include a rectangular shaft, a sensor upper bracket, a sensor lower bracket, and no less than one set of displacement sensors Iron core and displacement sensor coil; there is a rectangular shaft in the center of the inner cavity of the rubber tube liner, a mandrel through hole is installed in the center of the reducing joint and a mandrel sleeve is installed, the middle part of the mandrel sleeve has a shaft sleeve rectangular hole, and the upper part of the rectangular shaft passes through The rectangular hole of the shaft sleeve is set in the mandrel sleeve and can move up and down. The lower end of the rectangular shaft is fixedly connected to the upper end of the core tube connector; The sensor upper bracket and the sensor lower bracket, the center of the sensor upper bracket and the sensor lower bracket have a rectangular through hole respectively, and the middle part of the rectangular shaft is set in the rectangular through hole of the sensor upper bracket and the sensor lower bracket and can move up and down; the rubber tube liner There is an axial long hole in the liner on the right side and connects the inner cavity and the outside of the rubber tube liner. The outer right side of the upper sensor bracket and the lower sensor bracket have fixing screw holes respectively. The outer ends of the connecting screws are fixed on the upper rubber tube. On the support and the lower rubber tube support, the inner end of the connecting screw passes through the long hole of the lining tube and is fixed on the fixing screw holes of the upper rubber tube support and the lower rubber tube support; there is no less than one The joint through hole connecting the inner cavity of the rubber tube liner and the inner cavity of the central tube, the lower end of the sensor upper bracket is fixed with a displacement sensor core, the sensor lower bracket is fixed with a displacement sensor coil, and the lower part of the displacement sensor core is set in the displacement sensor coil And can move up and down, the signal output wire of the displacement sensor coil enters the inner cavity of the central tube through the joint through hole and extends to the outside of the lower end of the central tube.

The above-mentioned seal assembly may include a first rubber cartridge, a first spacer ring, a second rubber cartridge, a second spacer ring and a third rubber cartridge; the outer sides of the first spacer ring and the second spacer ring are respectively fixed with axial stress sensors , the lower part of the upper rubber cylinder support, the upper part of the lower rubber cylinder bearing, and the upper and lower parts of the first spacer and the second spacer ring have conical concave cavities respectively, the first rubber cylinder, the second rubber cylinder and the third rubber cylinder The upper part of the cylinder is respectively set in the upper rubber cylinder support, the first spacer and the second spacer in the conical cavity, and the lower part of the first rubber cylinder, the second rubber cylinder and the third rubber cylinder is respectively set in the first The spacer ring, the second spacer ring and the conical concave cavity on the upper part of the lower rubber tube support; the first spacer ring bracket and the second spacer ring are respectively located in the inner cavity of the rubber tube liner corresponding to the first spacer ring and the second spacer ring. Two spacer ring brackets, the centers of the first spacer ring bracket and the second spacer ring bracket have rectangular through holes respectively, and the middle part of the rectangular shaft is set in the rectangular through holes of the first spacer ring bracket and the second spacer ring bracket and can move up and down , the outer right sides of the first spacer bracket and the second spacer bracket have fixing screw holes respectively, and the first spacer bracket and the second spacer bracket are respectively fixed and installed by connecting screws and fixing screw holes passing through the long holes of the liner On the first spacer ring and the second spacer ring; the rear part of the sensor upper bracket has a fixing hole for the upper seat iron core and is fixedly installed with a displacement sensor core protruding downward, and the rear part of the first spacer ring bracket corresponds to the upper seat iron core The position of the fixing hole has a first coil fixing hole and is fixedly installed with an upwardly protruding displacement sensor coil; the front part of the first spacer bracket has a first iron core fixing hole and is fixedly installed with a downwardly protruding displacement sensor core , the front part of the second spacer bracket has a second coil fixing hole corresponding to the position of the first iron core fixing hole and is fixedly installed with an upwardly protruding displacement sensor coil; the rear part of the second spacer bracket is fixed by a second iron core hole and is fixedly installed with a displacement sensor core protruding downward, and the rear part of the sensor lower bracket corresponding to the second iron core fixing hole has a lower seat coil fixing hole and is fixedly installed with an upwardly protruding displacement sensor coil; The lower end of the displacement sensor core is sleeved in the adjacent displacement sensor coil below and can move up and down.

The above-mentioned radial stress sensor may include radial force strain gauges, and the radial force strain gauges are distributed equidistantly along a straight line and fixed on the outer right side of the casing.

The above-mentioned axial stress sensor may include axial force strain gauges; the front and rear parts of the upper rubber tube support, the first spacer ring, the second spacer ring and the lower rubber tube support are respectively equipped with sensor recesses with a flat bottom surface. Pit, the axial force strain gauge is fixed on the bottom surface of the sensor pit.

The right side of the upper rubber tube support, the first spacer ring, the second spacer ring and the lower rubber tube support can have radial wire holes respectively, and the upper rubber tube support, the first spacer ring, the second spacer ring and the lower side The outer side of the rubber cartridge support can have wire lead-out grooves connecting the radial wire hole and the sensor pit respectively, and the signal output wire of the axial force strain gauge passes through the wire lead-out groove, the radial wire hole, the long hole of the liner and the connector in turn. A hole enters the base tube lumen and protrudes outside the lower end of the base tube.

The right side of the upper rubber cylinder support, the first spacer ring, the second spacer ring and the lower rubber cylinder support can respectively have screw installation pits, the radial wire hole is located at the bottom of the screw installation pit, and the screw installation pit There is a screw mounting hole in the middle part of the bottom surface, and the outer end of the connecting screw is fixedly installed in the screw mounting hole of the upper rubber tube support, the first spacer ring, the second spacer ring or the lower rubber tube support.

The utility model is reasonable and compact, and is easy to use. By using the device, it can effectively and accurately measure the axial load, the friction force, the compression deformation of each rubber tube in the working process of the packer in real time, and the impact on the inside of the casing. Multiple parameters such as the contact pressure of the wall, and can ensure that the signal output wires of each sensor are not damaged, greatly reducing the cost of testing and testing, and can provide a reliable basis for the design and improvement of the packer.

Description of drawings

Accompanying drawing 1 is the front view sectional structural schematic diagram of the preferred embodiment of the present invention.

Accompanying drawing 2 is a schematic diagram of the axonometric structure of the displacement detection device in accompanying drawing 1 .

The codes in the attached drawings are: 1 is casing, 2 is upper head, 3 is lower head, 4 is upper head hole, 5 is lower head hole, 6 is support pipe, 7 is reducing joint, 8 is the rubber tube liner, 9 is the core tube connector, 10 is the central tube, 11 is the upper rubber tube support, 12 is the lower rubber tube support, 13 is the bushing, 14 is the rectangular shaft, 15 is the upper bracket of the sensor, 16 is the lower bracket of the sensor, 17 is the displacement sensor core, 18 is the displacement sensor coil, 19 is the mandrel through hole, 20 is the mandrel sleeve, 21 is the rectangular hole of the shaft sleeve, 22 is the liner long hole, 23 is the fixing screw Hole, 24 is the connecting screw, 25 is the first rubber tube, 26 is the first spacer ring, 27 is the second rubber tube, 28 is the second spacer ring, 29 is the third rubber tube, 30 is the first spacer ring bracket, 31 is the second spacer bracket, 32 is the upper seat iron core fixing hole, 33 is the first coil fixing hole, 34 is the first iron core fixing hole, 35 is the second coil fixing hole, 36 is the second iron core fixing hole, 37 is the coil fixing hole of the base seat, 38 is the radial force strain gauge, 39 is the axial force strain gauge, 40 is the sensor pit, 41 is the radial wire hole, 42 is the wire lead-out groove, 43 is the joint through hole, 44 The pit is installed for the screw, and 45 is the hole for the screw.

Detailed ways

The utility model is not limited by the following examples, and the specific implementation manner can be determined according to the technical scheme of the utility model and actual conditions.

Below in conjunction with embodiment and accompanying drawing, the utility model is further described:

As shown in Figure 1, the packer downhole compression packer mechanical parameter testing device includes a casing 1, an upper head 2, a lower head 3, a packer, a radial stress sensor and an axial stress sensor; The upper end of casing 1 is fixedly installed with upper head 2, and the lower end of casing 1 is fixedly installed with lower head 3. There is a lower head hole 5 connected to the inner cavity of the casing 1; a packer with a seal assembly is installed in the inner cavity of the casing 1, and the upper part of the packer is set in the upper head hole 4 and can be moved up and down Move, the lower part of the packer is set in the lower head hole 5 and can move up and down, the elastic seal assembly can reduce in height and increase in outer diameter due to the downward extrusion of the packer, and can be packed There is no less than one radial stress sensor installed on the outside of the casing 1 that can detect the radial thrust of the seal assembly on the casing 1, and no less than one radial stress sensor is installed on the packer. An axial stress sensor capable of detecting axial pressure on the seal assembly. Due to the elasticity of the seal assembly, when the packer moves down, the height of the seal assembly decreases due to extrusion deformation, and the outer diameter increases, thereby blocking the inner cavity of the casing 1; when the packer moves up , the seal assembly is restored to its original shape, so that the inner cavity of the casing 1 is communicated. The radial stress sensor and the axial stress sensor can not only measure the contact pressure distribution between the rubber sleeve and the casing, but also dynamically measure the axial load on the seal assembly during the isolation process.

The above embodiments can be further optimized or/and improved according to actual needs:

As shown in Figure 1, the packer includes a support tube 6, a reducing joint 7, a rubber tube liner 8, a core tube connector 9, a central tube 10, an upper rubber tube support 11, a lower rubber tube support 12 and Bushing 13; the upper part of the support tube 6 is set in the upper head hole 4 and can move up and down, the lower end of the support tube 6 is fixedly connected with the upper end of the variable diameter joint 7, and the lower end of the variable diameter joint 7 is connected with the rubber tube liner 8 are fixedly connected together, the lower end of the rubber tube liner 8 is fixedly connected with the upper end of the heart tube connector 9, the lower end of the heart tube connector 9 is fixedly connected with the upper end of the center tube 10, and the center tube 10 is fixedly connected together. The lower part is set in the lower head hole 5 and can move up and down; the outer part of the rubber tube liner 8 is sequentially set with the upper rubber tube support 11, the seal assembly and the lower rubber tube support 12, and the upper rubber tube support The upper end of the seat 11 is pressed against the lower end of the variable diameter joint 7, the upper end of the seal assembly is pressed against the lower end of the upper rubber tube support 11, and the upper end of the lower rubber tube support 12 is pressed against the lower end of the seal assembly. The lower end can move up and down due to the axial compression or restoration of the seal assembly. The outer sides of the upper rubber tube support 11 and the lower rubber tube support 12 are respectively fixed with axial stress sensors; the lower end of the lower rubber tube support 12 There is a bushing 13 in the inner cavity of the casing 1 between the upper end of the lower head 3, and the bottom of the rubber tube liner 8 and the heart tube connector 9 are located in the inner cavity of the bushing 13 and can move up and down. The seal assembly of the packer can be fixed through the packer, and the axial load on the seal assembly during the packing process and its force on the casing 1 can be dynamically measured.

As shown in Figures 1 and 2, a displacement detection device capable of detecting the axial compression deformation of the seal assembly is installed on the packer. The displacement detection device includes a rectangular shaft 14, an upper sensor bracket 15, and a lower sensor bracket 16. And not less than one set of displacement sensor core 17 and displacement sensor coil 18; the center of the inner cavity of the rubber tube liner 8 has a rectangular shaft 14, and the center of the variable diameter joint 7 has a mandrel through hole 19 and a mandrel sleeve 20 is installed. The middle part of the mandrel sleeve 20 has a shaft sleeve rectangular hole 21, the upper part of the rectangular shaft 14 is set in the mandrel sleeve 20 through the shaft sleeve rectangular hole 21 and can move up and down, and the lower end of the rectangular shaft 14 is fixedly connected to the upper end of the heart tube connector 9 ; In the inner cavity of the upper rubber tube support 11 and the lower rubber tube support 12, the upper sensor bracket 15 and the lower sensor bracket 16 are fixedly installed by connecting screws 24 respectively, and the centers of the upper sensor bracket 15 and the lower sensor bracket 16 have rectangles respectively. Through hole, the middle part of the rectangular shaft 14 is set in the rectangular through hole of the sensor upper bracket 15 and the sensor lower bracket 16 and can move up and down; the right side of the rubber tube liner 8 has an axial liner long hole 22 and communicates with the rubber tube The inner cavity and the outside of the liner 8, the outer right side of the sensor upper bracket 15 and the sensor lower bracket 16 respectively have fixing screw holes 23, and the outer ends of the connecting screws 24 are fixed on the upper rubber tube support 11 and the lower rubber tube support 12 On the top, the inner end of the connecting screw 24 passes through the long hole 22 of the liner and is fixed on the fixing screw hole 23 of the upper rubber tube support 11 and the lower rubber tube support 12; there is no less than one connecting hole on the core tube connector 9 The joint through hole 43 of the inner cavity of the rubber tube liner 8 and the inner cavity of the central tube 10, the lower end of the sensor upper bracket 15 is fixed with a displacement sensor core 17, the sensor lower bracket 16 is fixed with a displacement sensor coil 18, and a displacement sensor core 17 The lower part of the casing is set in the displacement sensor coil 18 and can move up and down. The signal output wire of the displacement sensor coil 18 enters the inner cavity of the central tube 10 through the joint through hole 43 and extends to the outside of the lower end of the central tube 10. The compression deformation of the seal assembly during the sealing process can be dynamically measured through the displacement detection device. The connector through hole 43 can ensure that the signal output wires of each displacement sensor are not damaged, and the test data output by the signal output wires can be collected, processed and output by the data acquisition system.

As shown in the accompanying drawing 1, the seal assembly includes a first rubber sleeve 25, a first spacer ring 26, a second rubber sleeve 27, a second spacer ring 28 and a third rubber tube 29; the first spacer ring 26 and the second Axial stress sensors are respectively fixed on the outside of the spacer ring 28, and the bottom of the upper rubber tube support 11, the upper part of the lower rubber tube support 12, and the upper and lower parts of the first spacer ring 26 and the second spacer ring 28 respectively have truncated cones. Concavity, the upper part of the first rubber cylinder 25, the second rubber cylinder 27 and the third rubber cylinder 29 are respectively set in the conical concave cavity on the top of the upper rubber cylinder support 11, the first spacer ring 26 and the second spacer ring 28 , the lower parts of the first rubber tube 25, the second rubber tube 27 and the third rubber tube 29 are respectively set in the first spacer ring 26, the second spacer ring 28 and the conical concave cavity on the upper part of the lower rubber tube support 12; There are first spacer ring support 30 and second spacer ring support 31 in the inner chamber of barrel liner 8 corresponding to first spacer ring 26 and second spacer ring 28, first spacer ring support 30 and second spacer ring support The center of 31 has rectangular through hole respectively, and the middle part of rectangular shaft 14 is sleeved in the rectangular through hole of the first spacer ring support 30 and the second spacer ring support 31 and can move up and down, the first spacer ring support 30 and the second spacer ring The outer right side of the support 31 has fixing screw holes 23 respectively, and the first spacer ring support 30 and the second spacer ring support 31 are fixedly installed on the first spacer ring support 30 and the second spacer ring support 31 by connecting screws 24 and fixing screw holes 23 passing through the liner elongated hole 22 respectively. On the ring 26 and the second spacer ring 28; the rear portion of the sensor upper bracket 15 has an upper seat iron core fixing hole 32 and is fixedly installed with a displacement sensor iron core 17 protruding downwards, and the rear portion of the first spacer ring support 30 corresponds to the upper seat The position of the iron core fixing hole 32 has the first coil fixing hole 33 and is fixedly installed with the displacement sensor coil 18 protruding upward; Stretch out displacement sensor core 17, the position of the front portion of the second spacer support 31 corresponds to the first iron core fixing hole 34 has the second coil fixing hole 35 and is fixedly installed with the displacement sensor coil 18 that protrudes upwards; The rear portion of the spacer bracket 31 has a second iron core fixing hole 36 and is fixedly installed with a displacement sensor iron core 17 protruding downwards. The rear portion of the sensor lower bracket 16 corresponds to the second iron core fixing hole 36. The coil fixing holes 37 are fixedly installed with upwardly protruding displacement sensor coils 18; the lower ends of the above-mentioned displacement sensor cores 17 are sleeved in the adjacent displacement sensor coils 18 below and can move up and down. By using multiple sets of displacement sensor cores 17 and displacement sensor coils 18 , it is possible to more accurately and real-time measure the compression deformation of each rubber cartridge of the seal assembly during the sealing process.

As shown in FIG. 1 , the radial stress sensor includes radial force strain gauges 38 , and the radial force strain gauges 38 are equidistantly distributed along a straight line and fixed on the outer right side of the casing 1 . The radial force strain gauge 38 can measure the deformation of the outer wall of the sleeve 1 from top to bottom, thereby detecting the pressure of the first rubber sleeve 25, the second rubber sleeve 27 and the third rubber sleeve 29 on the inner wall of the sleeve 1, that is, the first The loads on the first rubber cylinder 25 , the second rubber cylinder 27 and the third rubber cylinder 29 . The radial stress sensor can also be other known force sensors. The test data output by the signal output wire of the radial force strain gauge 38 can be collected, processed and output by the data acquisition system.

As shown in Figure 2, the axial stress sensor includes an axial force strain gauge 39; the front and rear of the upper rubber cylinder support 11, the first spacer ring 26, the second spacer ring 28 and the lower rubber cylinder support 12 There are respectively sensor pits 40 with flat bottom surfaces on the upper part, and the axial force strain gauges 39 are fixed on the bottom surfaces of the sensor pits 40 . Axial force strain gauge 39 can detect the axial load suffered by the upper rubber tube support 11, the first spacer ring 26, the second spacer ring 28 and the lower rubber tube support 12, as well as the connection between the sleeve pipe 1 and the rubber tube liner. Mechanical parameters such as the friction force of the pipe 8. The axial stress sensor can also be other known force sensors.

As shown in accompanying drawing 2, the right side of upper rubber tube support 11, first spacer ring 26, second spacer ring 28 and lower rubber tube support 12 has radial lead hole 41 respectively, and upper rubber tube support 11, The outer sides of the first spacer ring 26, the second spacer ring 28, and the lower rubber tube support 12 respectively have wire lead-out grooves 42 connecting the radial wire holes 41 and the sensor pits 40, and the signal output wires of the axial force strain gauges 39 are sequentially arranged. Enter the inner cavity of the central tube 10 through the lead-out groove 42 , the radial wire hole 41 , the liner long hole 22 and the joint through hole 43 and protrude to the outside of the lower end of the central tube 10 . Through the radial wire hole 41 and the wire lead-out groove 42, the packer avoids damage to the wire of the axial stress sensor and the wire of the displacement detection device during the setting process. The joint through hole 43 can ensure that the signal output wires of each axial force strain gauge 39 are not damaged, and the test data output by the signal output wires can be collected, processed and output by the data acquisition system.

As shown in accompanying drawing 2, there are screw installation pits 44 on the right side of the upper rubber tube support 11, the first spacer ring 26, the second spacer ring 28 and the lower rubber tube support 12, and the radial wire holes 41 are located on the screw holes. The bottom surface bottom part of installation pit 44, screw installation hole 45 is arranged in the bottom surface middle part of screw installation pit 44, and the outer end of connecting screw 24 is fixedly installed on rubber tube support 11, the first spacer ring 26, the second spacer ring 28 or In the screw mounting hole 45 of the rubber cartridge support 12. The screw installation recess 44 can protect the outer end of the connecting screw 24 from being damaged, and can further protect the wires of the axial stress sensor and the wires of the displacement detection device.

The above technical features constitute the best embodiment of the utility model, which has strong adaptability and implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

The following is the use method of the above-mentioned preferred embodiment: first, apply a downward force to the support tube 6, so that the first rubber sleeve 25, the second rubber sleeve 27 and the third rubber sleeve 29 are deformed by force to make the sleeve 1 inner chamber barrier; then, real-time dynamic measurement of the strain value of each axial force strain gauge 39 on the upper rubber tube support 11, the first spacer ring 26, the second spacer ring 28 and the lower rubber tube support 12, thereby calculating respectively Calculate the axial compression force acting on the upper rubber cylinder support 11, the first spacer ring 26, the second spacer ring 28 and the lower rubber cylinder support 12, and calculate the Obtain the friction force suffered by the first rubber cylinder 25, the second rubber cylinder 27 and the third rubber cylinder 29; at the same time, real-time dynamic measurement of the change of the induced electromotive force of each displacement sensor coil 18, calculate the displacement sensor iron core 17 and each group The relative displacement of the displacement sensor coil 18 is the compression amount of each rubber tube, and the total compression amount of the seal assembly can be obtained by summing the compression amounts of each rubber tube; at the same time, the strain of each radial force strain gauge 38 is dynamically measured in real time value, to obtain the corresponding relationship between the contact pressure on the inner wall of the sleeve 1 and the strain of the radial force strain gauge 38 fixed on the outside of the sleeve 1; finally, according to the compression amount of each rubber sleeve mentioned above, determine the The exact position in the casing 1 and the strain value of the radial force strain gauge 38 fixed at the location of the casing 1 can be used to calculate the contact pressure of the rubber sleeve on the inner wall of the casing 1 .

Claims (10)

1. A packer downhole compression packer mechanical parameter testing device is characterized in that it comprises a casing, an upper head, a lower head, a packer, a radial stress sensor and an axial stress sensor; An upper head is fixedly installed on the upper end, and a lower head is fixedly installed on the lower end of the casing. The packer with seal assembly is installed in the inner cavity of the casing, the upper part of the packer is set in the upper head hole and can move up and down, and the lower part of the packer is set in the lower head hole and can move up and down , the elastic seal assembly can reduce in height and increase in outer diameter due to the downward movement of the packer, and can return to its original shape due to the upward movement of the packer; no less than one seal assembly is installed on the outside of the casing A radial stress sensor capable of detecting the radial thrust of the seal assembly on the casing, and no less than one axial stress sensor capable of detecting the axial pressure of the seal assembly is installed on the packer. 2. The packer downhole compression packer mechanical parameter testing device according to claim 1, characterized in that the packer includes a support pipe, a variable diameter joint, a rubber sleeve liner, a core tube connector, a center tube, The upper rubber tube support, the lower rubber tube support and the bushing; the upper part of the support tube is set in the hole of the upper head and can move up and down, and the lower end of the support tube is fixedly connected with the upper end of the variable diameter joint. The lower end is fixedly connected with the upper end of the rubber tube liner, the lower end of the rubber tube liner is fixedly connected with the upper end of the core tube connector, the lower end of the core tube connector is fixedly connected with the upper end of the center tube, and the center tube The lower part is set in the hole of the lower head and can move up and down; the outer part of the rubber tube liner is fitted with the upper rubber tube support, the seal assembly and the lower rubber tube support in sequence from top to bottom, and the upper end of the upper rubber tube support Tightly on the lower end of the variable diameter joint, the upper end of the seal assembly is tight on the lower end of the upper rubber tube support, and the upper end of the lower rubber tube support is tight on the lower end of the seal assembly Axial compression or return to the original shape and move up and down, the outer sides of the upper rubber tube support and the lower rubber tube support are respectively fixed with axial stress sensors; the casing between the lower end of the lower rubber tube support and the upper end of the lower head There is a liner in the cavity, and the lower part of the rubber tube liner and the connecting head of the heart tube are located in the inner cavity of the liner and can move up and down. 3. The packer downhole compression packer mechanical parameter testing device according to claim 2, characterized in that a displacement detection device capable of detecting the axial compression deformation of the seal assembly is installed on the packer, and the displacement The detection device includes a rectangular shaft, a sensor upper bracket, a sensor lower bracket, and no less than one set of displacement sensor core and displacement sensor coil; there is a rectangular shaft in the center of the inner cavity of the rubber tube liner, and a mandrel through the center of the variable diameter joint. There is a mandrel sleeve in the middle of the mandrel sleeve. The upper part of the rectangular shaft is set in the mandrel sleeve through the rectangular hole of the shaft sleeve and can move up and down. The lower end of the rectangular shaft is fixedly connected to the upper end of the tube connector. ;In the inner cavity of the upper rubber tube support and the lower rubber tube support, the upper sensor bracket and the lower sensor bracket are respectively fixed and installed by connecting screws. Set in the rectangular through hole of the sensor upper bracket and the sensor lower bracket and can move up and down; the right side of the rubber tube liner has an axial liner long hole and connects the inner cavity and the outside of the rubber tube liner, the sensor upper bracket and There are fixed screw holes on the outer right side of the lower bracket of the sensor respectively. The outer ends of the connecting screws are fixed on the upper rubber tube support and the lower rubber tube support, and the inner ends of the connecting screws are fixed on the upper rubber tube support through the long hole of the liner. On the fixed screw hole of the seat and the lower rubber tube support; there is no less than one joint through hole connecting the inner cavity of the rubber tube liner and the inner cavity of the central tube on the core tube connector, and the lower end of the sensor upper bracket is fixed with a displacement sensor core The displacement sensor coil is fixed on the lower bracket of the sensor. The lower part of the displacement sensor core is set in the displacement sensor coil and can move up and down. The signal output wire of the displacement sensor coil enters the inner cavity of the central tube through the joint through hole and extends to the center tube. lower exterior. 4. The packer downhole compression packer mechanical parameter testing device according to claim 3, characterized in that the seal assembly includes a first rubber cartridge, a first spacer ring, a second rubber cartridge, and a second spacer ring and the third rubber tube; the outer sides of the first spacer and the second spacer are respectively fixed with axial stress sensors, the lower part of the upper rubber tube support, the upper part of the lower rubber tube support and the first spacer and the second spacer The upper and lower parts of the upper and lower parts respectively have conical concave cavities, and the upper parts of the first rubber tube, the second rubber tube and the third rubber tube are respectively set on the upper rubber tube support, the first spacer ring and the upper part of the second spacer ring. In the cavity, the lower parts of the first rubber tube, the second rubber tube and the third rubber tube are respectively set in the first spacer ring, the second spacer ring and the conical concave cavity on the upper part of the lower rubber tube support; the rubber tube liner The position corresponding to the first spacer ring and the second spacer ring in the inner cavity has a first spacer ring support and a second spacer ring support respectively, and the center of the first spacer ring support and the second spacer ring support has a rectangular through hole respectively, and a rectangular shaft The middle part is set in the rectangular through holes of the first spacer bracket and the second spacer bracket and can move up and down. There are fixing screw holes on the outer right sides of the first spacer bracket and the second spacer bracket respectively. The first spacer The bracket and the second spacer bracket are respectively fixed and installed on the first spacer and the second spacer through the connecting screw and the fixing screw hole passing through the long hole of the liner; the rear part of the sensor upper bracket has a fixing hole for the upper seat iron core A displacement sensor core protruding downward is installed, and the rear part of the first spacer ring bracket corresponds to the position of the iron core fixing hole of the upper seat. There is a first coil fixing hole and a displacement sensor coil protruding upward is fixedly installed; the first spacer ring The front part of the bracket has a first iron core fixing hole and is fixedly installed with a displacement sensor core protruding downward. The front part of the second spacer bracket has a second coil fixing hole corresponding to the first iron core fixing hole and is fixed. A displacement sensor coil protruding upwards is installed; the rear part of the second spacer ring bracket has a second core fixing hole and is fixedly installed with a displacement sensor core protruding downwards, and the rear part of the sensor lower bracket corresponds to the second core The position of the fixing hole has a lower seat coil fixing hole and a displacement sensor coil protruding upward is fixedly installed; the lower ends of the above-mentioned displacement sensor cores are set in the adjacent displacement sensor coils below and can move up and down. 5. The packer downhole compression packer mechanical parameter testing device according to claim 1 or 2 or 3 or 4, characterized in that the radial stress sensor comprises a radial force strain gauge, and the radial force strain gauge is along a straight line The equidistant distribution is fixed on the outer right side of the casing. 6. The packer downhole compression packer mechanical parameter testing device according to claim 4, characterized in that the axial stress sensor comprises an axial force strain gauge; Sensor pits with flat bottom surfaces are respectively arranged on the front and rear parts of the spacer ring and the outer side of the lower rubber tube support, and the axial force strain gauges are fixed on the bottom surface of the sensor pits. 7. The packer downhole compression packer mechanical parameter testing device according to claim 5, characterized in that the axial stress sensor comprises an axial force strain gauge; Sensor pits with flat bottom surfaces are respectively arranged on the front and rear parts of the spacer ring and the outer side of the lower rubber tube support, and the axial force strain gauges are fixed on the bottom surface of the sensor pits. 8. The packer downhole compression packer mechanical parameter testing device according to claim 6, characterized in that the right side of the upper rubber cylinder support, the first spacer ring, the second spacer ring and the lower rubber cylinder support There are radial wire holes respectively, and the outer sides of the upper rubber tube support, the first spacer ring, the second spacer ring and the lower rubber tube support respectively have wire lead-out grooves connecting the radial wire holes and sensor pits, and the axial force and strain The signal output wires of the sheet enter the inner cavity of the central tube through the wire lead-out groove, the radial wire hole, the long hole of the lining tube and the through hole of the joint in sequence and protrude to the outside of the lower end of the central tube. 9. The packer downhole compression packer mechanical parameter testing device according to claim 7, characterized in that the right side of the upper rubber tube support, the first spacer ring, the second spacer ring and the lower rubber tube support There are radial wire holes respectively, and the outer sides of the upper rubber tube support, the first spacer ring, the second spacer ring and the lower rubber tube support respectively have wire lead-out grooves connecting the radial wire holes and sensor pits, and the axial force and strain The signal output wires of the sheet enter the inner cavity of the central tube through the wire lead-out groove, the radial wire hole, the long hole of the lining tube and the through hole of the joint in sequence and protrude to the outside of the lower end of the central tube. 10. The packer downhole compression packer mechanical parameter testing device according to claim 9, characterized in that the right side of the upper rubber tube support, the first spacer ring, the second spacer ring and the lower rubber tube support There are screw installation pits respectively, the radial wire hole is located at the lower part of the bottom surface of the screw installation pit, the middle part of the bottom surface of the screw installation pit has a screw installation hole, and the outer end of the connecting screw is fixedly installed on the upper rubber cylinder support, the first spacer ring , The second spacer or the screw mounting hole of the lower rubber cylinder support.

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