CN114075938B - Self-tightening type deflection-preventing setting device - Google Patents

Abstract

The invention provides a self-tightening type deflection-preventing setting device which comprises a shell and a movable shaft, wherein the movable shaft comprises an upper joint (11) fixedly connected with a whipstock and a mandrel (13) in transmission connection with the upper joint, the upper joint extends out of an upper port of the shell and is rotatably connected with the shell, and the upper end of the mandrel is slidably connected with the upper joint through a piston (12). The middle part of casing is provided with logical groove, is provided with jack catch (6) and floating plectrum (7) in the logical groove, and the one end and the casing of jack catch are articulated, and the medial surface of the other end is under the effect of elastic component with floating plectrum looks butt. The middle part of dabber is provided with the drive division that is used for driving the floating plectrum, and drive division includes first gear (132) and conical body (133), and the upper portion of floating plectrum is for being used for with first gear engagement's second gear, and the lower part is for being used for with conical body complex cam body. The self-tightening anti-deflection setting device provided by the invention can effectively solve the problem that the setting device is easy to deflect in the window sidetrack drilling operation process.

Description

Self-tightening type deflection-preventing setting device

Technical Field

The invention relates to the technical field of window sidetracking, in particular to a self-tightening type deflection-preventing setting device.

Background

In the petroleum and natural gas industry, the windowing sidetrack drilling technology is applied to old wells and abandoned wells, so that residual oil reservoirs can be developed to a great extent, the exploitation efficiency is improved, and the oil exploitation cost is reduced. In the window sidetracking operation, it is important to ensure reliable setting of the whipstock and the setting device, and whether the well track of the window sidetracking can enter a design target point is directly influenced. The setting tool must ensure effective setting when running down the well, as well as withstand weight on bit and cutting torque from the drill bit during the windowing process. If the setting device fails in the process of sidetracking during windowing, slippage and deflection occur, the position state of the whipstock can be directly changed, so that the windowing position is wrong, and the sidetracking operation during windowing is failed under serious conditions. Thus, ensuring that the setting tool position does not deflect is one of the key techniques for the fenestration sidetracking operation.

Unlike packers which are less susceptible to external loading after setting, setting tools used in open-window sidetracking operations continue to be subjected to weight on bit, torque transmitted through the whipstock, and continued mechanical vibration after setting, which is a significant challenge for setting tools, and therefore, there is a need to provide a setting tool that is still reliably maintained in a set condition under the aforementioned severe conditions.

Disclosure of Invention

In view of the above, the invention provides a self-tightening anti-deflection setting device, which can effectively solve the problem that the setting device is easy to deflect in the window sidetrack drilling operation process.

In order to achieve the above purpose, the present invention provides the following technical solutions:

The self-tightening type deflection-preventing setting device comprises a shell and a movable shaft penetrating through the shell, wherein the movable shaft comprises an upper joint fixedly connected with a whipstock and a mandrel in transmission connection with the upper joint, the upper joint extends out of an upper port of the shell and is rotatably connected with the shell, the upper end of the mandrel is slidably connected with the upper joint through a piston, and a positioning part for being clamped with the shell is arranged at the lower end of the mandrel;

The middle part of the shell is provided with more than two through grooves which are uniformly distributed along the circumferential direction, a claw and a floating shifting block are arranged in the through grooves, one end of the claw is hinged with the shell, and the inner side surface of the other end is abutted with the floating shifting block under the action of an elastic piece;

The middle part of dabber is provided with and is used for driving the drive division of floating plectrum, the drive division includes first gear and is located the conical body of first gear below, the upper end of conical body is bigger than the lower extreme, the upper portion of floating plectrum be used for with first gear engagement's second gear, the lower part be used for with conical body complex cam body, the upper end and the lower extreme of floating plectrum are provided with and are located flat square shaft on the second gear shaft, through the top surface and the bottom surface in groove seted up with flat square shaft complex spout, the spout is followed the radial extension of casing and the outside end are can hold flat square shaft rotatory circular slot.

Optionally, in the self-tightening anti-deflection setting device, one side, close to the center of the shell, of the cam body is a half-ring cone, the taper of the half-ring cone is equal to that of the cone, and the upper end of the half-ring cone is smaller than the lower end of the half-ring cone.

Optionally, in the self-tightening anti-deflection setting device, the outline of the outer side surface of the claw is zigzag.

Optionally, in the self-tightening anti-deflection setting device, the elastic piece is a torsion spring.

Optionally, in the self-tightening anti-deflection setting device, the upper joint and the mandrel are driven by a planetary gear mechanism, and the planetary gear mechanism comprises a gear ring arranged on the shell, a planet wheel arranged at the lower end of the upper joint and a sun wheel arranged at the upper end of the mandrel.

Optionally, in the self-tightening anti-deflection setting device, the shell comprises a gear cylinder, an anchor cylinder and a guide shoe which are sequentially connected from top to bottom, the gear ring is arranged on the inner wall of the gear cylinder, the through groove is formed in the anchor cylinder, a blind hole is formed in the center of the guide shoe, and a compression spring propped against the lower end of the mandrel is arranged in the blind hole.

Optionally, in the self-tightening anti-deflection setting device, the positioning portion is a hemispherical ring groove formed in the outer surface of the mandrel, a radial hole is formed in the inner wall of the blind hole, and a steel ball used for being clamped with the hemispherical ring groove and a locking spring used for propping against the steel ball are arranged in the radial hole.

Optionally, in the self-tightening anti-deflection setting device, the cylinder body of the anchor cylinder is provided with centralizing ribs uniformly distributed along the circumferential direction, and the through grooves are formed in the centralizing ribs.

Optionally, in the self-tightening anti-deflection setting device, three centralizing ribs are respectively arranged at the upper part and the lower part of the anchor cylinder, and two driving parts are arranged on the mandrel.

Optionally, in the self-tightening anti-deflection setting device, the lower end of the guide shoe is an ellipsoidal cone.

According to the technical scheme, in the self-tightening anti-deflection setting device provided by the invention, the clamping jaw and the floating shifting block are arranged in the through groove of the shell, one end of the clamping jaw is hinged with the shell, the inner side surface of the other end of the clamping jaw is abutted against the floating shifting block under the action of the elastic piece, the floating shifting block enables the outwards-opened force of the clamping jaw to come from the driving part of the mandrel, the driving part comprises the first gear and the conical body positioned below the first gear, the upper part of the floating shifting block is the second gear, and the lower part of the floating shifting block is the cam body. The mandrel moves downwards in the setting process, and the cone of the driving part outwards presses the cam body of the floating shifting block, so that the clamping jaw extends out of the through groove. When the positioning part at the lower end of the mandrel is clamped with the shell, the position of the mandrel is locked, at the moment, the part of the claw extending out of the through groove is clamped on the inner wall of the drilling sleeve to finish setting, and the first gear of the driving part falls to the same height as the second gear of the floating shifting block to finish meshing, so that in the window sidetracking process, the cutting torque applied by the drill bit to the whipstock rotates the upper joint, the mandrel rotating along with the upper joint rotates the floating shifting block relative to the shell through the first gear and the second gear which are mutually meshed, the rotating floating shifting block drives the claw to be outwards opened by a larger angle by utilizing the cam body of the floating shifting block, and then the claw is clamped with the inner wall of the drilling sleeve more tightly, thereby effectively preventing the upper joint from further rotating, and finally achieving the purpose of preventing the whipstock from deflecting.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a self-tightening anti-deflection setting device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram showing a self-tightening anti-deflection setting device according to an embodiment of the present invention;

FIG. 3 is a sectional view A1-A1 of FIG. 1;

FIG. 4 is a cross-sectional view A2-A2 of FIG. 2;

FIG. 5 is a cross-sectional view B1-B1 of FIG. 1;

FIG. 6 is a cross-sectional view B2-B2 of FIG. 2;

fig. 7 is a C-C cross-sectional view of fig. 1.

Marked in the figure as:

11. An upper joint; 12. a piston; 13. a mandrel; 131. a sun gear; 132. a first gear; 133. a cone; 134. hemispherical ring grooves;

21. a gear cylinder; 22. an anchor cylinder; 221. a chute; 23. guiding shoes;

3. a planet wheel; 4. a supporting plate; 5. a nut; 6. a claw; 7. a floating shift block; 71. a flat square shaft; 72. a second gear; 73. a half-ring cone; 74. a top angle;

81. a plug; 82. a locking spring; 83. steel balls;

9. compressing the spring.

Detailed Description

For ease of understanding, the present invention is further described below with reference to the accompanying drawings.

Referring to fig. 1 to 7, fig. 1 is a schematic view illustrating a state of a self-tightening anti-deflection setting device according to an embodiment of the present invention, fig. 2 is a second schematic view illustrating a state of a self-tightening anti-deflection setting device according to an embodiment of the present invention, fig. 3 is a sectional view A1-A1 of fig. 1, fig. 4 is a sectional view A2-A2 of fig. 2, fig. 5 is a sectional view B1-B1 of fig. 1, fig. 6 is a sectional view B2-B2 of fig. 2, and fig. 7 is a sectional view C-C of fig. 1.

The self-tightening type anti-deflection setting device provided by the embodiment of the invention comprises a shell and a movable shaft penetrating through the shell, wherein the middle part of the shell is provided with more than two through grooves which are uniformly distributed along the circumferential direction, a claw 6 and a floating shifting block 7 are arranged in the through grooves, one end of the claw 6 is hinged with the shell, the inner side surface (namely, the surface close to the center of the shell) of the other end is abutted against the floating shifting block 7 under the action of an elastic piece (not shown in the figure), the elastic piece is used for keeping the claw 6 in a retracted state, and the floating shifting block 7 is used for overcoming the elasticity of the elastic piece to enable the claw 6 to extend; the movable shaft comprises an upper joint 11 and a mandrel 13, wherein the upper joint 11 extends out of the upper port of the shell and is rotatably connected with the shell, the upper joint 11 is fixedly connected with the whipstock, the mandrel 13 is in transmission connection with the upper joint 11, and therefore torque from a drill bit, which is received by the whipstock, can be transmitted to the mandrel 13 through the upper joint 11.

In addition, the upper end of the mandrel 13 is slidably connected with the upper joint 11 through the piston 12, a positioning part for being clamped with the shell is arranged at the lower end of the mandrel 13, in the setting process, the pressure of drilling fluid in the drill string is increased, the drilling fluid pushes the piston 12 to move downwards, the mandrel 13 is changed from the state shown in fig. 1 to the state shown in fig. 2, the positioning part of the mandrel 13 is clamped with the shell in the state shown in fig. 2, so that the mandrel 13 is locked in position, and the drilling fluid in the drill string can be decompressed at the moment.

The force of the floating block 7 to extend the claw 6 comes from the mandrel 13, as shown in fig. 1, a driving part for driving the floating block 7 is arranged in the middle of the mandrel 13, the driving part comprises a first gear 132 and a conical body 133 positioned below the first gear 132, the upper end of the conical body 133 is larger than the lower end, the conical body 133 is used for pressing the floating block 7 outwards in the process that the mandrel 13 moves downwards, and the first gear 132 is used for applying torque to the floating block 7 when the mandrel 13 rotates.

As shown in fig. 1, 3 and 5, the upper part of the floating block 7 is a second gear 72 for meshing with a first gear 132, the lower part is a cam body for matching with a conical body 133, flat square shafts 71 positioned on the axis of the second gear 72 are arranged at the upper end and the lower end of the floating block 7, sliding grooves 221 matched with the flat square shafts 71 are formed in the top surface and the bottom surface of a through groove where the floating block 7 is positioned, the sliding grooves 221 extend along the radial direction of the shell, and the outer side end is a circular groove capable of accommodating the rotation of the flat square shafts 71.

The position of the floating block 7 changes during setting as shown in fig. 3 and 4, in which the mandrel 13 moves down and presses the cam body of the floating block 7 outwards through the cone 133, and the flat square shaft 71 moves from the inner end to the outer end of the slide groove 221. As can be seen from fig. 3, when the flat square shaft 71 is positioned at the inner side end of the chute 221, the claw 6 is received in the through groove; as can be seen from fig. 4, when the flat square shaft 71 is located at the outer end of the sliding groove 221, a part of the claw 6 is propped out of the through groove by the floating poking block 7, and the claw 6 is clamped on the inner wall of the drilling casing after extending out, so as to complete setting.

The cutting position of fig. 5 and 6 is the height of the second gear 72 on the floating poking block 7, and as can be seen from fig. 6, when the flat square shaft 71 is located at the outer side end of the sliding groove 221, the first gear 132 on the mandrel 13 falls to the same height as the second gear 72 on the floating poking block 7 and is meshed with the same, so that in the window sidetracking process, the drill bit applies cutting torque to the whipstock, the whipstock transmits the torque to the upper joint 11 to rotate, and the mandrel 13 is in transmission connection with the upper joint 11, and the shell is in rotatable connection with the upper joint 11, so that the mandrel 13 rotates relative to the shell, the mandrel 13 drives the floating poking block 7 to rotate relative to the shell through the first gear 132 and the second gear 72 which are meshed with each other, and the rotating floating poking block 7 drives the claw 6 to open outwards by a larger angle by using the cam body of the same, so that the claw 6 is blocked with the inner wall of the drilling sleeve to be tighter, thereby effectively preventing the upper joint 11 from rotating further, and finally achieving the purpose of preventing deflection of the whipstock.

As can be seen from the above-described working principle, the floating poking block 7 can drive the claw 6 to open outwards by a larger angle, because the floating poking block 7 has a cam structure, in a specific practical application, the shape of the cam body can be flexibly designed, in this embodiment, one side of the cam body, which is close to the center of the housing, is designed as a half-ring cone 73, the other side is designed with a top angle 74, the taper of the half-ring cone 73 is equal to that of the cone 133, the upper end of the half-ring cone 73 is smaller than the lower end, and as can be seen from fig. 1 and 2, the lower contour of the floating poking block 7 is fitted with the contour of the cone 133.

In order to increase the clamping force, the outer side profile of the claw 6 is designed in a zigzag shape in this embodiment, as shown in fig. 3. Of course, other structures may be used to increase the clamping force, for example, a plurality of raised structures may be provided on the outer side of the jaws 6 to form a nail matrix.

The claw 6 can automatically retract and rely on the restoring force of an elastic member, which is arranged on the shell and can be a torsion spring or an extension spring.

In order to achieve a driving connection between the upper joint 11 and the spindle 13, the present embodiment designs a planetary gear mechanism comprising a ring gear provided on the housing, a planetary wheel 3 provided at the lower end of the upper joint 11 and a sun wheel 131 provided at the upper end of the spindle 13, as shown in fig. 1 and 7. Three planetary shafts are uniformly arranged at the circumference of the lower end of the upper joint 11, and after the planetary gears 3 and the supporting plates 4 are sequentially arranged on the planetary shafts, nuts 5 are screwed on the tail ends of the planetary shafts.

For easy assembly, the housing in this embodiment includes a gear cylinder 21, an anchor cylinder 22 and a guide shoe 23 sequentially connected from top to bottom, a gear ring in the planetary gear mechanism is disposed on an inner wall of the gear cylinder 21, a through groove for accommodating the claw 6 is disposed on the anchor cylinder 22, a blind hole is disposed in the center of the guide shoe 23, and a compression spring 9 abutting against the lower end of the mandrel 13 is disposed in the blind hole.

In the setting process, the mandrel 13 is locked by its positioning portion after moving down, in this embodiment, the positioning portion is a hemispherical ring groove 134 formed on the outer surface of the mandrel 13, and in cooperation with this, a radial hole is formed on the inner wall of the blind hole of the guide shoe 23, and a steel ball 83 for clamping with the hemispherical ring groove 134 and a locking spring 82 for pressing the steel ball 83 are disposed in the radial hole. As can be seen from fig. 1 and 2, the radial hole in the guide shoe is a through hole, the outer end is blocked by a plug 81, and the plug 81 is in threaded connection with the guide shoe 23 and can be detached.

In a specific practical application, the cylinder body of the anchor cylinder 22 is generally provided with centralizing ribs uniformly distributed along the circumferential direction, so that the through groove for accommodating the clamping jaw 6 can be formed on the centralizing ribs. The number of the centering ribs can be set as required, and in this embodiment, three centering ribs are respectively provided at the upper and lower portions of the anchor cylinder 22, and correspondingly, two driving portions are provided at the mandrel 13. To facilitate the running down the well, the lower end of the shoe 23 is typically designed as an ellipsoidal cone.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The self-tightening type deflection-preventing setting device is characterized by comprising a shell and a movable shaft penetrating the shell, wherein the movable shaft comprises an upper joint (11) fixedly connected with a whipstock and a mandrel (13) in transmission connection with the upper joint (11), the upper joint (11) stretches out of an upper port of the shell and is rotatably connected with the shell, the upper end of the mandrel (13) is slidably connected with the upper joint (11) through a piston (12), and a positioning part for being clamped with the shell is arranged at the lower end of the mandrel (13);

the middle part of the shell is provided with more than two through grooves which are uniformly distributed along the circumferential direction, a claw (6) and a floating shifting block (7) are arranged in the through grooves, one end of the claw (6) is hinged with the shell, and the inner side surface of the other end is abutted with the floating shifting block (7) under the action of an elastic piece;

The middle part of dabber (13) is provided with the drive division that is used for driving floating shifting block (7), the drive division includes first gear (132) and is located conical body (133) of first gear (132) below, conical body (133) upper end is bigger than the lower extreme, floating shifting block (7) upper portion be for being used for with second gear (72) meshing of first gear (132), the lower part be for being used for with conical body (133) complex cam body, floating shifting block (7) upper end and lower extreme are provided with be located flat square shaft (71) on second gear (72) axis, lead to top surface and the bottom surface in groove seted up with conical body (71) complex spout (221), spout (221) are along radial extension of casing and outside end are can hold flat square shaft (71) rotatory circular slot, the one side that the cam body is close to the casing center is cone (73), semi-ring body (73) with conical body semi-ring (73) taper ratio conical body (73) lower extreme equal.

2. Self-tightening anti-deflection setting device according to claim 1, characterized in that the outer side profile of the jaws (6) is zigzag.

3. The self-tightening anti-deflection setting device of claim 1 wherein the resilient member is a torsion spring.

4. Self-tightening anti-deflection setting device according to claim 1, characterized in that the upper joint (11) and the mandrel (13) are driven by a planetary gear mechanism comprising a gear ring arranged on the housing, a planet wheel (3) arranged at the lower end of the upper joint (11) and a sun wheel (131) arranged at the upper end of the mandrel (13).

5. The self-tightening anti-deflection setting device according to claim 4, wherein the shell comprises a gear cylinder (21), an anchor cylinder (22) and a guide shoe (23) which are sequentially connected from top to bottom, the gear ring is arranged on the inner wall of the gear cylinder (21), the through groove is arranged on the anchor cylinder (22), a blind hole is formed in the center of the guide shoe (23), and a compression spring (9) propped against the lower end of the mandrel (13) is arranged in the blind hole.

6. The self-tightening anti-deflection setting device according to claim 5, wherein the positioning part is a hemispherical ring groove (134) formed on the outer surface of the mandrel (13), a radial hole is formed in the inner wall of the blind hole, and a steel ball (83) used for being clamped with the hemispherical ring groove (134) and a locking spring (82) used for pushing the steel ball (83) are arranged in the radial hole.

7. The self-tightening anti-deflection setting device according to claim 5, wherein the barrel of the anchor barrel (22) is provided with centralizing ribs which are uniformly distributed along the circumferential direction, and the through grooves are formed on the centralizing ribs.

8. Self-tightening anti-deflection setting device according to claim 7, characterized in that the upper and lower parts of the anchor cylinder (22) are provided with three said righting ribs each, the mandrel (13) being provided with two said driving parts.

9. Self-tightening anti-deflection setting device according to any one of claims 5 to 8, characterized in that the lower end of the guide shoe (23) is an ellipsoidal cone.