CN115182693B - PDC drill bit replacing device in pit - Google Patents

Abstract

The invention discloses an underground PDC drill bit replacement device, which comprises a drill collar, a locking ring, a knife wing, a drill bit blank, a right lifting platform, a drill blade pillar, a drill blade, a transmission rod, and a left lifting platform. The lower part of the knife slides along the up and down direction to set two lifting platforms, the upper lifting platform is hinged with the upper part of the drill blade, the lower lifting platform is hinged with the lower end of the drill blade pillar, the middle part of the drill blade is hinged with the upper part of the drill blade pillar, and the drill blade The side is provided with a drill blade for cutting, the drill blank and the drill collar are fixedly connected, and the drill blank and the blade are detachably connected; Between the blades. The invention avoids the tripping process in the traditional drill bit replacement, makes the drill bit replacement process simpler and safer, saves a lot of time, and effectively avoids possible engineering problems in the tripping process.

Description

A Downhole Replacement PDC Bit Device

technical field

The invention relates to the technical field of oil and gas exploration equipment and appliances, in particular to an underground PDC drill bit replacement device.

technical background

The PDC drill bit is a commonly used drilling tool in the geological drilling industry. During drilling operations, when the drill teeth are worn or the existing drill bit model does not match the geology, it needs to be replaced with a new drill bit. Existing way of changing drill bit all is to utilize equipment to take out all the drilling tools in the well, load onto new drill bit after the old drill bit is unloaded and go down in the well in the order of the original column to resume drilling.

At present, there are many devices that can quickly replace the drill bit. For example, the Chinese patent No. CN201610579685 discloses a PDC drill bit with detachable drill teeth. The drill teeth are detachably connected to the blade. When replacing, replace them with new drill teeth Remove the old drill teeth without replacing the drill bit matrix, which reduces the time for replacing the drill bit and also reduces the waste of resources. But the realization of this method needs all drilling tools to be all taken out earlier, can not save the time required for the tripping process.

Contents of the invention

The purpose of this invention is to design a kind of device that can change the drill bit downhole, simplify the process of changing the drill bit, avoid tripping, and save more time.

The object of the present invention is achieved in this way: a device for replacing PDC drill bits downhole, including a drill collar 1, a locking ring 3, a knife wing 5, and a drill bit blank 6, characterized in that the device for replacing PDC drill bits downhole also includes a right lifting platform 4 , drill blade pillar 7, drill blade 8, transmission rod 9, left lifting platform 10, the upper part of the drill collar 1 is provided with an auxiliary cutter 2, and the lower part slides along the upper and lower directions to set two lifting platforms. The upper part of the platform and the drill blade 8 is hinged, and the lower end of the lifting platform and the drill blade pillar 7 is hinged. The middle part of the drill blade 8 is hinged with the upper part of the drill blade pillar 7. The drill blade 8 is provided with a drill blade for cutting. 81, the drill blank 6 is fixedly connected to the drill collar 1, and the drill blank 6 and the blade 5 are detachably connected; the blade 5 includes a J-shaped blade blank 52, and the outer surface of the blade blank 52 is The cutting teeth 53 are fixedly arranged, and the lower end of the blade blank 52 is provided with an upwardly extending outstretched boss 54, and the position of the drill blade 8 is between the two blades 5 installed on the drill blank 6. The diameters of the upper lifting platform and the lower lifting platform are smaller than the aperture of the well.

The lift platform includes a left lift platform 10 and a right lift platform 4, the left lift platform 10 and the right lift platform 4 are detachably connected, the auxiliary knife 2 includes a blade 5 and a locking ring 3, and the locking The ring 3 is set in the locking block 2 51 of the knife wing 5, and the auxiliary knife 2 is detachably arranged on the support frame 12 of the drill collar 1 through the locking ring 3, and the middle part of the drill collar 1 is arranged vertically. Positioning block one 13 is arranged, and described positioning block one 13 offers the threaded hole that runs through along the vertical direction, and the threaded hole of positioning block one 13 matches with the thread of transmission rod 9, and described upper lifting platform is arranged on positioning block one. 13 below.

The connection platform 61 on the upper part of the drill blank 6 is fixedly connected to the lower end of the drill collar 1, and the installation platform 62 on the lower part of the drill blank 6 is provided with the same number of installation grooves 63 as the number of blades 5 along the vertical direction. It is detachably connected with the installation groove 63. The lifting platform also includes a locking ring 3, the middle part of the right lifting platform 4 is a right bottom plate 41, the upper part of the right bottom plate 41 is provided with a locking block one 43, and the lower part is provided with a positioning block two 44, so The structure of the left lifting platform 10 and the right lifting platform 4 is corresponding, the locking block 43 is provided with a through hole, and the locking ring 3 is set in the locking block 43 of the left lifting platform 10 and the right lifting platform 4, The middle part of the left lifting platform 10 and the right lifting platform 4 offers a guide groove 42 penetrating in the vertical direction, the top of the drilling blade 8 is hinged with the positioning block 2 44 of the lifting platform above, and the drilling blade pillar 7 is hinged. The positioning block two 44 of the bottom and the lower lifting platform are hinged.

The inner surface of the upper part of the knife wing 5 is provided with a locking block 2 51, and the locking block 2 51 is provided with a circumferential through hole, and the locking ring 3 is movable in the locking block 2 51, and the locking ring 3 3 is made of plastic material, the middle part of the locking ring 3 is a locking band 31, and the two ends are provided with overhanging bands 32, the overall shape of the locking ring 3 is circular, and there is a distance between the overhanging bands 32 After the locking ring 3 passes through all the blades 6 installed on the drill blank 6, bolts are used to reduce the distance between the overhanging bands 32, so as to achieve the purpose of fixing the relative positions of the blade 5 and the drill blank 6. After the blade 5 is installed, the lower surface of the locking block 2 51 is attached to the upper surface of the mounting platform 62 .

The middle section of the drill collar 1 is a guide rod 11 whose shape corresponds to the guide groove 42. The upper part of the drill collar 1 protrudes and is provided with a support frame 12 for placing the auxiliary cutter 2, and the middle part of the drill collar 1 is provided along the vertical direction. There is a positioning block one 13, and the bottom of the drill collar 1 is provided with a support platform 14 for supporting the lower lifting platform.

The shape of the drill blade 8 and the drill blade pillar 7 is rod-shaped, the vertical direction of the side of the drill blade 8 is provided with a drill blade edge 81 for cutting, and the positioning block 3 82 is arranged on the inner surface of the drill blade 8 In the middle, the drill blade pillar 7 and the positioning block three 82 are hinged.

The number of blades 5 is set according to actual conditions, and there are 3, 4, 5 or 6 blades. There are 5 described drill blades 8. The bottom of the drill blank 6 is provided with an upward groove. The shape of the support frame 12 is "L".

Compared with prior art, the present invention has following advantage:

1. The present invention is an underground PDC drill bit replacement device, which avoids the tripping process in the traditional drill bit replacement process, makes the drill bit replacement process simpler and safer, and saves a lot of time.

2. Since the present invention does not need tripping when replacing the drill bit, it effectively avoids possible engineering problems in the tripping process.

3. When replacing the drill bit in the present invention, only the worn blades need to be replaced, and the drill bit blank can be recycled, which saves materials and reduces the waste of resources.

Description of drawings

Figure 1 is an overall schematic diagram of the downhole replacement PDC bit device

Figure 2 is a partial schematic diagram of the drill collar

Figure 3 is a schematic diagram of the drill bit

Figure 4 is a schematic diagram of the blade

Figure 5 is a schematic diagram of the locking ring

Figure 6 is a schematic diagram of the front of the lifting platform

Figure 7 is a schematic diagram of the reverse side of the lifting platform

Figure 8 is a schematic diagram of the auxiliary knife

Fig. 9 is a schematic diagram of part A of Fig. 1 Reference signs: 1-drill collar, 2-assistant cutter, 3-locking ring, 4-right lifting platform, 5-knife wing, 6-drill bit blank, 7-drill blade Pillar, 8-drill blade, 9-transmission rod, 10-left lifting platform, 11-guide rod, 12-support frame, 13-positioning block 1, 14-support platform, 31-locking belt, 32-extension belt , 41-right bottom plate, 42-guide groove, 43-locking block 1, 44-positioning block 2, 51-locking block 2, 52-blade blank, 53-cutting tooth, 54-extending boss, 61-connection Platform, 62-installation platform, 63-installation groove, 81-drilling blade, 82-location block three.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The left-right orientation is the up-down, left-right orientation described in this application, so as to describe this application.

As shown in Figures 1 to 9, a downhole replacement PDC bit device of the present application includes a drill collar 1, a locking ring 3, a right lifting platform 4, a blade 5, a drill blank 6, a drill blade pillar 7, a drill blade 8, Transmission rod 9, left elevating platform 10. As shown in Figure 1, the upper part of the drill collar 1 is provided with an auxiliary cutter 2, and the lower part is slid along the upper and lower directions to set two lifting platforms, the upper lifting platform and the upper part of the drill blade 8 are hinged, and the lower lifting platform and The lower end of the drill blade support 7 is hinged, and the middle part of the drill blade 8 and the upper part of the drill blade support 7 are hinged. The lower end of the drill collar 1 is fixedly connected with the drill bit.

As shown in FIGS. 3-5 , the drill includes: a locking ring 3 , a blade 5 , and a drill blank 6 . The connecting platform 61 on the upper part of the drill blank 6 is fixedly connected to the lower end of the drill collar 1, and the mounting platform 62 on the lower part of the drill blank 6 is provided with the same number of mounting grooves 63 as the number of blades 5 along the vertical direction. The drill blank 6 The bottom of the blade is provided with an upward groove, and the blade 5 is detachably connected with the installation groove 63 . The inner surface of the upper part of the knife wing 5 is provided with a locking block 2 51, and the locking block 2 51 is provided with a circumferential through hole, and the locking ring 3 is movable in the locking block 2 51, and the locking ring 3 3 is made of plastic material, the middle part of the locking ring 3 is a locking band 31, and the two ends are provided with overhanging bands 32, the overall shape of the locking ring 3 is circular, and there is a distance between the overhanging bands 32 After the locking ring 3 passes through all the blades installed on the drill blank 6, bolts are used to reduce the distance between the overhanging bands 32, so as to achieve the purpose of fixing the relative positions of the blade 5 and the drill blank 6. After the blade 5 is installed, the lower surface of the locking block 2 51 is attached to the upper surface of the mounting platform 62. The blade 5 also includes a "J" shaped blade blank 52, the blade blank 52 The cutting teeth 53 are fixedly arranged on the outer surface, and the lower end of the blade blank 52 is provided with an upwardly extending protruding boss 54 .

As shown in Figures 6-7, the lift platform includes: a left lift platform 10, a right lift platform 4, and a locking ring 3. The left lift platform 10 and the right lift platform 4 are detachable, and the right lift platform 4 is detachable. The middle part of lifting platform 4 is right base plate 41, and the top of described right base plate 41 is provided with locking block one 43, and the bottom is provided with positioning block two 44, and described left lifting platform 10 is corresponding with right lifting platform 4 structures. The locking block one 43 is provided with a through hole, and the locking ring 3 is passed through the locking block one 43 of the left lifting platform 10 and the right lifting platform 4 . The middle parts of the left lifting platform 10 and the right lifting platform 4 are provided with guide grooves 42 penetrating in the vertical direction. The upper part of the drill blade 8 is hinged with the positioning block 2 44 of the upper lifting platform, and the lower part of the drill blade pillar 7 is hinged with the positioning block 2 44 of the lower lifting platform.

As shown in Figures 1-2, the middle section of the drill collar 1 is a guide rod 11 whose shape corresponds to the guide groove 42. The upper part of the drill collar 1 is extended to provide a support frame 12 for placing the auxiliary cutter. 1 is provided with a positioning block 13 along the vertical direction, and the bottom of the drill collar 1 is provided with a support platform 14 for supporting the lower lifting platform. Described positioning block one 13 offers the threaded hole that runs through along the vertical direction, and the threaded hole of positioning block one 13 matches with the screw thread of transmission rod 9 . The upper lifting platform is arranged below the positioning block one 13 .

As shown in Figure 1 and Figure 8, the auxiliary knife includes a blade 5 and a locking ring 3, the locking ring 3 is set in the locking block 2 51 of the blade 5, and the auxiliary knife passes through the locking ring 3 is arranged on the support frame 12 of the drill collar 1. The shape of the support frame 12 is "L" to prevent the auxiliary knife from falling.

As shown in Figures 1 and 9, the shape of the drill blade 8 and the drill blade pillar 7 is rod-shaped, and the vertical direction of the side of the drill blade 8 is provided with a drill blade edge 81 for cutting, and the positioning block three 82 is arranged in the middle of the inner surface of the drill blade 8, and the drill blade pillar 7 and the positioning block 82 are hinged.

In order to prevent the drill blades 8 from interfering when drilling with a drill bit, the position of the drill blades 8 is between the two blades 5 installed on the drill blank 6 .

The diameters of the above lifting platform and the lower lifting platform are smaller than the aperture of the well.

The number of blades 5 is set according to actual conditions, usually 3, 4, 5, 6.

When in use, the downhole robot is put into the well, and the downhole robot turns the transmission rod 9, so that the transmission rod 9 pushes the upper lifting platform to move downward, and the drilling blade 8 is slowly opened. When the drilling blade 8 is opened, the surrounding rock is cut. The opening of leaf 8 will eventually form a cavity with a diameter larger than the drill bit around the rock. At this time, the nut on the locking ring 3 in the upper lifting platform is unscrewed, so that the left lifting platform 10 and the right lifting platform 4 of the upper lifting platform are separated. state, then stop the rotation of the drill collar 1, use the downhole robot to unscrew the nut on the locking ring 3 in the lower lifting platform to make the left lifting platform 10 and the right lifting platform 4 of the lower lifting platform in a separated state. Then use the downhole robot to unscrew the nut on the locking ring 3 in the drill bit, so that the blade 5 and the drill bit blank 6 are in a detachable state, remove the blade 5 below, and place the replaced blade 5 on the drill blade on the rock In the formed conical space position, unscrew but not completely unscrew the bolts of the locking ring 3 in the auxiliary knife, and separate the auxiliary knife from the support frame 12. The auxiliary knife slides down due to gravity and slides to the position of the drill bit blank. Block 2 51 is arranged on the inner surface of blade 5, so after locking block 2 51 touches mounting platform 62, the auxiliary blade stops falling, and the position of the auxiliary blade and the diameter of locking ring 3 are adjusted so that each blade 5 of the auxiliary blade Correspondingly installed in each installation groove 63 of the drill blank 6, then tighten the bolts of the locking ring 3, so that the auxiliary cutter is fixed on the drill blank 6, and the drilling can be resumed after removing the downhole robot from the well.

In particular, in order to make full use of the material, the auxiliary knife 2 can be provided with multiple as required. After replacing the auxiliary knife, the left lifting platform 10 and the right lifting platform 4 of the upper lifting platform and the lower lifting platform are reassembled to the Together, the above steps can be repeated the next time the drill bit needs to be replaced.

The present invention is not limited to the above-mentioned optional embodiments, anyone can draw other various forms of products under the enlightenment of the present invention, but no matter make any changes in its shape or structure, any change that falls within the scope of the claims of the present invention The technical solutions within the scope all fall within the protection scope of the present invention.

Claims (8)

1. A device for replacing a PDC bit in a downhole, comprising a drill collar (1), a locking ring (3), a blade (5), and a drill bit blank (6), characterized in that the device for changing a PDC bit in a downhole also includes a right lifting platform (4), drill blade pillar (7), drill blade (8), transmission rod (9), left lifting table (10), the upper part of the drill collar (1) is provided with an auxiliary cutter (2), and the lower part is along the upper 1. Slidingly set two lifting platforms in the downward direction, wherein the lifting platform above is hinged with the upper part of the drilling blade (8), and the lifting platform below is hinged with the lower end of the drilling blade pillar (7). The middle part is hinged with the upper part of the drill blade pillar (7), and the side of the drill blade (8) is provided with a drill blade edge (81) for cutting. The drill bit blank (6) and the drill collar (1) are fixedly connected, and the drill bit blank ( 6) and the blade (5) are detachably connected; the blade (5) includes a "J" shaped blade embryo (52), and the outer surface of the blade embryo (52) is fixedly provided with cutting teeth (53), The lower end of the blade blank (52) is provided with an upwardly extending protruding boss (54), and the position of the drill blade (8) is between the two blades (5) mounted on the drill blank (6). Between, the diameter of the lifting platform above and the lifting platform below is smaller than the aperture of the well; The lifting platform above and the lifting platform below comprise respectively a left lifting platform (10) and a right lifting platform (4), the left lifting platform (10) and the right lifting platform (4) are detachably connected, and the auxiliary knife (2) Including the blade (5) and the locking ring (3), the locking ring (3) is installed in the locking block 2 (51) of the blade (5), and the auxiliary blade (2) passes through the The locking ring (3) of the knife (2) is detachably arranged on the support frame (12) of the drill collar (1), and the middle part of the drill collar (1) is provided with a positioning block (13) along the vertical direction. ), said positioning block one (13) offers a through threaded hole along the vertical direction, the threaded hole of positioning block one (13) matches the thread of the transmission rod (9), and the lifting platform above is arranged on Below the positioning block one (13); The connecting platform (61) on the upper part of the drill blank (6) is fixedly connected to the lower end of the drill collar (1), and the mounting platform (62) on the lower part of the drill blank (6) is set in the vertical direction to match the number of blades (5). The same mounting groove (63), the blade (5) is detachably connected to the mounting groove (63); The inner surface of the upper part of the knife wing (5) is provided with locking block two (51), and the locking block two (51) is provided with a circumferential through hole, and the described locking ring (3) is movably worn on the locking block two ( 51), the locking ring (3) is made of plastic material, the middle part of the locking ring (3) is a locking band (31), and the two ends are provided with an overhanging band (32), and the locking ring ( 3) The overall shape is circular, and there is a distance between the outstretched bands (32). After the locking ring (3) passes through all the blades (5) installed on the drill blank (6), it passes through To reduce the distance between the overhanging bands (32), to achieve the purpose of fixing the relative position of the blade (5) and the drill bit blank (6), after the installation of the blade (5) is completed, the locking block 2 (51) The lower surface and the upper surface of the mounting table (62) fit together. 2. The downhole replacement PDC drill bit device according to claim 1, characterized in that: the lifting platform above and the lifting platform below also include locking rings (3) respectively, and the right lifting platform (4) The middle part is the right bottom plate (41), the top of the right bottom plate (41) is provided with a locking block one (43), and the bottom is provided with a positioning block two (44), and the left elevating platform (10) and the right elevating platform Platform (4) structure is corresponding, and described locking piece one (43) offers through hole, and locking ring (3) is worn in the locking piece one (43) of left lifting platform (10) and right lifting platform (4). ), the middle part of the left lifting platform (10) and the right lifting platform (4) is provided with a guide groove (42) penetrating in the vertical direction, and the positioning of the lifting platform on the top of the drill blade (8) and above Block two (44) are hinged, and the positioning block two (44) of the lifting platform below the described drill blade pillar (7) bottom and below are hinged. 3. The downhole replacement PDC bit device according to claim 2, characterized in that: the middle section of the drill collar (1) is a guide rod (11) whose shape corresponds to the guide groove (42), and the drill collar (1) ) is provided with a supporting frame (12) for placing the auxiliary cutter (2), the middle part of the drill collar (1) is provided with a positioning block (13) along the vertical direction, and the lower part of the drill collar (1) is provided with a positioning block (13). The supporting platform (14) of the lifting platform under the support. 4. The downhole replacement PDC drill bit device according to claim 1, characterized in that: the shape of the drill blade (8) and the drill blade pillar (7) is rod-shaped, and the side of the drill blade (8) A drill blade edge (81) for cutting is provided in the vertical direction, and the positioning block three (82) is arranged in the middle of the inner surface of the drill blade (8), and the drill blade pillar (7) and the positioning block three (82) are hinged . 5. The downhole replacement PDC bit device according to claim 3, characterized in that: the number of said blades (5) is set according to the actual situation, and there are 3, 4, 5 or 6 pieces. 6. The downhole replacement PDC bit device according to claim 5, characterized in that there are five drill blades (8). 7. The downhole replacement PDC drill bit device according to claim 6, characterized in that: the bottom of the drill bit blank (6) is provided with an upward groove. 8. The downhole replacement PDC bit device according to claim 7, characterized in that: the shape of the support frame (12) is "L".

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