Axial impact acceleration device for high-temperature-resistant oil and gas drilling

Abstract

The invention relates to the technical field of drilling tools, in particular to a high-temperature-resistant oil and gas drilling axial impact acceleration device which comprises an upper connector, an outer cylinder, a lower connector, a flow dividing gland, an impact seat and an axial impact device. The outer cylinder is fixedly mounted on the outer side of the lower end of the upper connector, the lower connector is fixedly mounted on the inner side of the lower end of the outer cylinder, and a limiting table is arranged on the inner side of the lower end of the outer cylinder; and a shunting gland with the upper end positioned in the upper joint is fixedly mounted on the upper side of the limiting table. The device is reasonable and compact in structure and convenient to use, by arranging the eccentric connecting shaft, the eccentric connecting shaft can generate vertical height change along with rotation of the left impeller and the right impeller, and therefore the impact hammer connected with the lower portion of the eccentric connecting shaft through the impact transmission assembly can do periodic reciprocating axial motion to generate axial impact force; by arranging the flow dividing gland, drilling fluid sequentially passes through the side flow hole, the cooling inlet hole, the cooling vertical hole and the cooling outlet hole and then flows out of the lower connector, continuous cooling of the axial impact device is achieved, and the axial impact device has the advantages of being stable, reliable and efficient.

Description

Technical Field

[0001] This invention relates to the field of drilling tool technology, and is a high-temperature resistant axial impact speed-up device for oil and gas drilling. Background Technology

[0002] In the process of oilfield exploration and development, improving the rate of drilling (RTD) is a perpetual goal pursued by the oilfield development industry. Currently, numerous different types of drilling speed-up tools have been developed and put into field testing both domestically and internationally, achieving good results. Existing drilling speed-up tools mainly achieve the speed-up effect by applying impact to the drill bit, and can be divided into axial impact speed-up devices and circumferential impact speed-up tools based on the form of impact.

[0003] Chinese patent document CN109555472B discloses a rotary impact device, which includes an outer cylinder, an upper mandrel, a lower mandrel, a mandrel anvil, an impact generator, an impact drive assembly, and an impact execution assembly. An upper mandrel capable of rotation is suspended on the upper inner side of the outer cylinder, and a lower mandrel capable of rotation is mounted and limited on the lower inner side of the outer cylinder. An upper anvil is provided on the inner side of the upper end of the lower mandrel, and the lower part of the upper mandrel is fitted into the mounting anvil and positioned therein. Above the mandrel anvil, the lower part of the upper mandrel and the upper part of the lower mandrel are connected together, and the upper mandrel can move up and down relative to the lower mandrel. The lower part of the upper mandrel is fixed with an impact generator that can strike the mandrel anvil when it moves down. An impact drive assembly is installed on the outside of the lower mandrel and is fitted inside the outer cylinder and can rotate synchronously with the lower mandrel. An impact execution assembly is installed on the inside of the outer cylinder and sits on the impact drive assembly. The impact execution assembly can periodically move up and down as the impact drive assembly rotates. This circumferential impact assembly has the following technical defects: (1) The impactor structure is complicated and there are many vulnerable parts; (2) The stroke is short. It only generates periodic undulating motion along the protrusion and groove of the roller to drive the periodic up and down reciprocating motion of the upper mandrel. Summary of the Invention

[0004] This invention provides a high-temperature resistant axial impact acceleration device for oil and gas drilling, which overcomes the shortcomings of the prior art and can effectively solve the problems of complex structure and short stroke of existing torsion impactors.

[0005] The technical solution of the present invention is achieved through the following measures: A high-temperature resistant oil and gas drilling axial impact acceleration device includes an upper connector, an outer cylinder, a lower connector, a diversion gland, an impact seat, and an axial impact device. The outer cylinder is fixedly installed on the outer side of the lower end of the upper connector, and the lower connector is fixedly installed on the inner side of the lower end of the outer cylinder. A limiting platform is provided on the inner side of the lower end of the outer cylinder, and a diversion gland located inside the upper connector is fixedly installed on the upper side of the limiting platform. The diversion gland is provided with a jet hole. An impact seat is fixedly installed on the inner side of the upper part of the lower connector, and the impact seat is provided with a flow hole. The axial impact device includes an impact drive assembly, an impact transmission assembly, and an impact hammer. The impact drive assembly, which can be rotated by hydraulic drive, is provided in the outer cylinder corresponding to the position below the jet hole. An impact hammer is provided on the upper side of the impact seat. An impact transmission assembly, which enables the impact hammer to periodically reciprocate axially with the impact drive assembly, is provided in the outer cylinder.

[0006] The following are further optimizations and / or improvements to the above-mentioned technical solution: The aforementioned impact drive assembly may include a drive cylinder, a left rotating shaft, a right rotating shaft, a left impeller, a right impeller, an eccentric connecting shaft, a left bearing, and a right bearing. The drive cylinder has a left mounting hole on its left inner side, and a left rotating shaft with its right end located to its right is located in the left mounting hole. A left bearing is located between the left end of the left rotating shaft and the drive cylinder. A left impeller is fixedly installed on the outer side of the right end of the left rotating shaft. A right mounting hole is located on the right inner side of the drive cylinder corresponding to the position of the left mounting hole. A right rotating shaft with its left end located to its left is located in the right mounting hole. A right bearing is located between the right end of the right rotating shaft and the drive cylinder. A right impeller is fixedly installed on the outer side of the right and left ends of the right rotating shaft. Jet holes are provided on the diversion glands above the left and right impellers. An eccentric connecting shaft is fixedly installed between the lower right side of the left impeller and the lower left side of the right impeller. An impact transmission assembly is located between the outer side of the middle part of the eccentric connecting shaft and the upper side of the impact hammer.

[0007] The aforementioned impact transmission assembly may include a front guide block, a rear guide block, a front guide strip, a rear guide strip, and a pull rod. A front guide block is fixedly installed on the front inner side of the upper end of the lower connector, and a rear guide block is fixedly installed on the rear inner side of the upper end of the lower connector. The front guide block and the rear guide block are in a minor arc shape. The rear side of the front guide block has an upward-opening front vertical groove, and the front side of the rear guide block has an upward-opening rear vertical groove. An impact hammer is provided between the front guide block and the rear guide block. A front guide strip located in the front vertical groove is provided on the front side of the impact hammer, and a rear guide strip located in the rear vertical groove is provided on the rear side of the impact hammer. A pull rod with its lower end located below it is provided on the outer side of the middle part of the eccentric connecting shaft. The lower end of the pull rod is fixedly installed together with the upper side of the impact hammer.

[0008] The aforementioned drive cylinder may include a left half-cylinder, a right half-cylinder, a front connecting lug, a rear connecting lug, and fixing bolts. The left half-cylinder is U-shaped with its opening to the right, and the right half-cylinder is U-shaped with its opening to the left. Front connecting lugs are fixedly installed at the right end of the front middle section of the left half-cylinder and the left end of the front middle section of the right half-cylinder. Rear connecting lugs are fixedly installed at the right end of the rear middle section of the left half-cylinder and the left end of the rear middle section of the right half-cylinder. The front connecting lugs are fixedly installed together by fixing bolts, and the rear connecting lugs are fixedly installed together by fixing bolts.

[0009] The aforementioned flow divider cap may include a flow divider neck and a flow divider plate. A flow divider neck is fixedly installed at the center of the upper side of the flow divider plate, with its upper end located inside the upper connector. A jet hole is provided on the upper side of the flow divider plate corresponding to the position inside the flow divider neck. Several side flow holes are provided at intervals along the circumference at the lower part of the flow divider neck. Several cooling inlets are provided at intervals along the circumference on the upper side of the flow divider plate corresponding to the position outside the flow divider neck. A vertical cooling hole is provided on the limiting platform corresponding to the position of each cooling inlet. A cooling outlet hole is provided on the inner side of the lower part of the lower connector corresponding to the position of each cooling vertical hole, with its upper end able to communicate with the cooling vertical hole.

[0010] This invention features a reasonable and compact structure, and is easy to use. By setting an eccentric connecting shaft, it can generate a vertical height change as the left and right impellers rotate, thereby enabling the impact hammer connected to the impact transmission assembly below to periodically reciprocate axially and generate axial impact force. By setting a diversion pressure cap, the drilling fluid flows out from the lower connector after passing through the side flow hole, cooling inlet hole, cooling vertical hole and cooling outlet hole in sequence, realizing continuous cooling of the axial impact device. It has the characteristics of stability, reliability and high efficiency. Attached Figure Description

[0011] Appendix Figure 1 These are schematic diagrams of the main cross-sectional structure of embodiments 1 to 5 of the present invention.

[0012] Appendix Figure 2 For the appendix Figure 1 A three-dimensional structural diagram of the impact drive component.

[0013] Appendix Figure 3 For the appendix Figure 1 A three-dimensional structural diagram of a medium-sized impact hammer.

[0014] Appendix Figure 4 For the appendix Figure 1 A three-dimensional structural diagram of the lower connector.

[0015] Appendix Figure 5 For the appendix Figure 1 A three-dimensional structural diagram of the center-diverter cap.

[0016] Appendix Figure 6 For the appendix Figure 1 A three-dimensional structural diagram of the drive cylinder.

[0017] Appendix Figure 7 For the appendix Figure 1 A schematic diagram of the three-dimensional structure of the inner and outer cylinders.

[0018] Appendix Figure 8 For the appendix Figure 1 A three-dimensional structural diagram of the impact seat.

[0019] The codes in the attached diagram are as follows: 1 is the upper connector, 2 is the lower connector, 3 is the outer cylinder, 4 is the impact seat, 5 is the impact hammer, 6 is the left rotating shaft, 7 is the right rotating shaft, 8 is the left impeller, 9 is the right impeller, 10 is the eccentric connecting shaft, 11 is the right bearing, 12 is the front guide block, 13 is the rear guide block, 14 is the front guide strip, 15 is the tie rod, 16 is the left half cylinder, 17 is the right plate cylinder, 18 is the front connecting lug, 19 is the flow divider neck, 20 is the flow divider plate, 21 is the limiting platform, 22 is the jet hole, 23 is the cooling inlet hole, 24 is the cooling vertical hole, 25 is the cooling outlet hole, 26 is the side flow hole, and 27 is the flow passage hole. Detailed Implementation

[0020] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0021] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0022] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figures 1 to 8As shown, the high-temperature resistant oil and gas drilling axial impact acceleration device includes an upper connector 1, an outer cylinder 3, a lower connector 2, a diversion gland, an impact seat 4, and an axial impact device. The outer cylinder 3 is fixedly installed on the outer side of the lower end of the upper connector 1, and the lower connector 2 is fixedly installed on the inner side of the lower end of the outer cylinder 3. A limiting platform 21 is provided on the inner side of the lower end of the outer cylinder 3, and a diversion gland located inside the upper connector 1 is fixedly installed on the upper side of the limiting platform 21. The diversion gland is provided with a jet hole 22. The impact seat 4 is fixedly installed on the inner side of the upper part of the lower connector 2, and the impact seat 4 is provided with a flow hole 27. The axial impact device includes an impact drive assembly, an impact transmission assembly, and an impact hammer 5. The impact drive assembly, which can be rotated by hydraulic drive, is provided in the outer cylinder 3 corresponding to the position below the jet hole 22. The impact hammer 5 is provided on the upper side of the impact seat 4. The impact transmission assembly, which enables the impact hammer 5 to move axially back and forth periodically with the impact drive assembly, is provided in the outer cylinder 3. During use, after the drilling fluid enters the upper connector 1, it is pressurized and flows to the impact drive assembly through the jet hole 22, causing the impact drive assembly to rotate. After the impact drive assembly rotates, the impact hammer 5 moves up and down periodically through the impact transmission assembly, thereby achieving axial impact acceleration of the drill bit. Its structure is simple and effectively solves the problems of complex structure and short stroke of existing torsion impactors.

[0023] The above-mentioned high-temperature resistant oil and gas drilling axial impact acceleration device can be further optimized and / or improved according to actual needs: Example 2: As shown in the attached document Figure 1 , 2 As shown, the impact drive assembly includes a drive cylinder, a left rotating shaft 6, a right rotating shaft 7, a left impeller 8, a right impeller 9, an eccentric connecting shaft 10, a left bearing, and a right bearing 11. The drive cylinder has a left mounting hole on its left inner side, and a left rotating shaft 6 with its right end located to its right is located in the left mounting hole. A left bearing is located between the left end of the left rotating shaft 6 and the drive cylinder. A left impeller 8 is fixedly installed on the outer side of the right end of the left rotating shaft 6. A right mounting hole is located on the right inner side of the drive cylinder corresponding to the position of the left mounting hole. A right rotating shaft 7 with its left end located to its left is located in the right mounting hole. A right bearing 11 is located between the right end of the right rotating shaft 7 and the drive cylinder. A right impeller 9 is fixedly installed on the outer side of the right and left ends of the right rotating shaft 7. Jet holes 22 are provided on the diversion glands above the positions corresponding to the positions of the left impeller 8 and the right impeller 9. An eccentric connecting shaft 10 is fixedly installed between the lower right side of the left impeller 8 and the lower left side of the right impeller 9. An impact transmission assembly is located between the outer side of the middle part of the eccentric connecting shaft 10 and the upper side of the impact hammer 5. During use, by setting an eccentric connecting shaft 10, it can generate a vertical height change as the left impeller 8 and the right impeller 9 rotate, thereby enabling the impact hammer 5 connected to the impact transmission assembly below to periodically reciprocate axially, generating axial impact force, improving the rock breaking efficiency of the PDC drill bit, and thus increasing the mechanical drilling speed.

[0024] Example 3: As shown in the attached document Figure 1 , 2As shown in Figures 3, 4, 5, 6, 7, and 8, the impact transmission assembly includes a front guide block 12, a rear guide block 13, a front guide strip 14, a rear guide strip, and a pull rod 15. The front guide block 12 is fixedly installed on the front inner side of the upper end of the lower connector 2, and the rear guide block 13 is fixedly installed on the rear inner side of the upper end of the lower connector 2. The front guide block 12 and the rear guide block 13 are in a minor arc shape. The rear side of the front guide block 12 is provided with an upward-opening front vertical groove, and the front side of the rear guide block 13 is provided with an upward-opening rear vertical groove. An impact hammer 5 is provided between the front guide block 12 and the rear guide block 13. The front side of the impact hammer 5 is provided with a front guide strip 14 located in the front vertical groove, and the rear side of the impact hammer 5 is provided with a rear guide strip located in the rear vertical groove. The outer side of the middle part of the eccentric connecting shaft 10 is provided with a pull rod 15 with its lower end located below it. The lower end of the pull rod 15 is fixedly installed together with the upper side of the impact hammer 5. During use, the front guide block 12, rear guide block 13, front guide strip 14, and rear guide strip are used to limit and guide the vertical movement of the impact hammer 5, preventing it from rotating. Depending on requirements, the top of the pull rod 15 can adopt a split clamp structure, facilitating the installation of the upper end of the pull rod 15 on the outside of the eccentric connecting shaft 10 (as shown in the attached diagram). Figure 2 (As shown).

[0025] Example 4: As shown in the appendix Figure 1 , 6 As shown in Figure 7, the drive cylinder includes a left half-cylinder 16, a right half-cylinder 17, a front connecting lug 18, a rear connecting lug, and fixing bolts. The left half-cylinder 16 is U-shaped with its opening to the right, and the right half-cylinder is U-shaped with its opening to the left. The front connecting lug 18 is fixedly installed at the right end of the front middle section of the left half-cylinder 16 and the left end of the front middle section of the right half-cylinder 17. The rear connecting lug is fixedly installed at the right end of the rear middle section of the left half-cylinder 16 and the left end of the rear middle section of the right half-cylinder 17. The front connecting lugs 18 and the rear connecting lugs are fixedly installed together by fixing bolts. During use, this split-type drive cylinder facilitates the installation of other components in the impact drive assembly within it. Depending on the requirements, the limiting platform 21 can be two slightly curved platforms spaced at intervals to avoid positional interference when installing the drive cylinder inside the outer cylinder 3, and to enable the installation and support of the diversion gland; in addition, vertically oriented long slots can be respectively provided on the two slightly curved platforms so that the front connecting ear 18 and the rear connecting ear are located within them (as shown in the attached figure). Figure 7 (As shown).

[0026] Example 5: As shown in the attached document Figure 1 , 5As shown, the flow divider cap includes a flow divider neck 19 and a flow divider plate 20. The flow divider neck 19 is fixedly installed in the center of the upper side of the flow divider plate 20, with its upper end located inside the upper connector 1. A jet hole 22 is provided on the upper side of the flow divider plate 20 corresponding to the position inside the flow divider neck 19. Several side flow holes 26 are provided at intervals along the circumference of the lower part of the flow divider neck 19. Several cooling inlets 23 are provided at intervals along the circumference of the upper side of the flow divider plate 20 corresponding to the position outside the flow divider neck 19. A vertical cooling hole 24 is provided on the limiting platform 21 corresponding to the position of each cooling inlet 23. A cooling outlet hole 25 is provided on the lower inner side of the lower connector 2 corresponding to the position of each cooling vertical hole 24, with its upper end able to communicate with the cooling vertical hole 24. During use, after the drilling fluid enters the upper connector 1, a portion of the fluid flows through the jet hole 22, passes through the axial impact device and the flow passage hole 27, and then flows out from the lower connector 2. The other portion of the fluid flows out from the lower connector 2 in sequence through the side flow hole 26, the cooling inlet hole 23, the cooling vertical hole 24, and the cooling outlet hole 25. This allows the drilling fluid to continuously cool the axial impact device, thereby extending the service life of the entire tool.

[0027] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A high-temperature resistant axial impact acceleration device for oil and gas drilling, characterized in that... The device includes an upper connector, an outer cylinder, a lower connector, a diversion gland, an impact seat, and an axial impact device. The outer cylinder is fixedly installed on the outer side of the lower end of the upper connector, and the lower connector is fixedly installed on the inner side of the lower end of the outer cylinder. A limiting platform is provided on the inner side of the lower end of the outer cylinder, and a diversion gland located inside the upper connector is fixedly installed on the upper side of the limiting platform. The diversion gland has a jet hole. An impact seat is fixedly installed on the inner side of the upper part of the lower connector, and the impact seat has a flow hole. The axial impact device includes an impact drive assembly, an impact transmission assembly, and an impact hammer. The impact drive assembly, which can be rotated by hydraulic drive, is located in the outer cylinder corresponding to the position below the jet hole. An impact hammer is located on the upper side of the impact seat. An impact transmission assembly, which enables the impact hammer to periodically reciprocate axially with the impact drive assembly, is located in the outer cylinder.

2. The high-temperature resistant oil and gas drilling axial impact acceleration device according to claim 1, characterized in that... The impact drive assembly includes a drive cylinder, a left rotating shaft, a right rotating shaft, a left impeller, a right impeller, an eccentric connecting shaft, a left bearing, and a right bearing. The drive cylinder has a left mounting hole on its left inner side, and a left rotating shaft with its right end to its right is located within the left mounting hole. A left bearing is located between the left end of the left rotating shaft and the drive cylinder. A left impeller is fixedly mounted on the outer side of the right end of the left rotating shaft. Corresponding to the position of the left mounting hole, the drive cylinder has a right mounting hole on its right inner side, and a right rotating shaft with its left end to its left is located within the right mounting hole. A right bearing is located between the right end of the right rotating shaft and the drive cylinder. A right impeller is fixedly mounted on the outer side of the right and left ends of the right rotating shaft. Jet holes are provided on the flow divider caps above the left and right impellers. An eccentric connecting shaft is fixedly mounted between the lower right side of the left impeller and the lower left side of the right impeller. An impact transmission assembly is located between the outer side of the middle of the eccentric connecting shaft and the upper side of the impact hammer.

3. The high-temperature resistant oil and gas drilling axial impact acceleration device according to claim 2, characterized in that... The impact transmission assembly includes a front guide block, a rear guide block, a front guide strip, a rear guide strip, and a tie rod. The front guide block is fixedly installed on the front inner side of the upper end of the lower connector, and the rear guide block is fixedly installed on the rear inner side of the upper end of the lower connector. The front guide block and the rear guide block are in a minor arc shape. The rear side of the front guide block has a front vertical groove with an upward opening, and the front side of the rear guide block has a rear vertical groove with an upward opening. An impact hammer is provided between the front guide block and the rear guide block. The front side of the impact hammer has a front guide strip located in the front vertical groove, and the rear side of the impact hammer has a rear guide strip located in the rear vertical groove. The outer side of the middle part of the eccentric connecting shaft has a tie rod with its lower end located below it. The lower end of the tie rod is fixedly installed together with the upper side of the impact hammer.

4. The high-temperature resistant oil and gas drilling axial impact acceleration device according to claim 2 or 3, characterized in that... The drive cylinder includes a left half-cylinder, a right half-cylinder, a front connecting lug, a rear connecting lug, and fixing bolts. The left half-cylinder is U-shaped with its opening to the right, and the right half-cylinder is U-shaped with its opening to the left. The front connecting lug is fixedly installed at the right end of the front middle section of the left half-cylinder and the left end of the front middle section of the right half-cylinder. The rear connecting lug is fixedly installed at the right end of the rear middle section of the left half-cylinder and the left end of the rear middle section of the right half-cylinder. The front connecting lugs are fixedly installed together by fixing bolts, and the rear connecting lugs are fixedly installed together by fixing bolts.

5. The high-temperature resistant oil and gas drilling axial impact acceleration device according to claim 1, 2, or 3, characterized in that... The flow divider cap includes a flow divider neck and a flow divider plate. A flow divider neck is fixedly installed in the center of the upper side of the flow divider plate, with its upper end located inside the upper connector. A jet hole is provided on the upper side of the flow divider plate corresponding to the position inside the flow divider neck. Several side flow holes are provided at intervals along the circumference at the lower part of the flow divider neck. Several cooling inlets are provided at intervals along the circumference on the upper side of the flow divider plate corresponding to the position outside the flow divider neck. A vertical cooling hole is provided on the limiting platform corresponding to the position of each cooling inlet. A cooling outlet hole is provided on the inner side of the lower part of the lower connector corresponding to the position of each cooling vertical hole, with its upper end able to communicate with the cooling vertical hole.

6. The high-temperature resistant oil and gas drilling axial impact acceleration device according to claim 4, characterized in that... The flow divider cap includes a flow divider neck and a flow divider plate. A flow divider neck is fixedly installed in the center of the upper side of the flow divider plate, with its upper end located inside the upper connector. A jet hole is provided on the upper side of the flow divider plate corresponding to the position inside the flow divider neck. Several side flow holes are provided at intervals along the circumference at the lower part of the flow divider neck. Several cooling inlets are provided at intervals along the circumference on the upper side of the flow divider plate corresponding to the position outside the flow divider neck. A vertical cooling hole is provided on the limiting platform corresponding to the position of each cooling inlet. A cooling outlet hole is provided on the inner side of the lower part of the lower connector corresponding to the position of each cooling vertical hole, with its upper end able to communicate with the cooling vertical hole.

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