A type of guide tilting tool

Abstract

This invention provides a guiding skewer tool, comprising an upper pull rod, a skewer mandrel sleeve, a skewer mandrel, a lower pull rod, and a guide shoe. One end of the upper pull rod is connected to a steel wire rope, and the other end of the upper pull rod is detachably connected to one end of the skewer mandrel sleeve. The other end of the skewer mandrel sleeve is rotatably connected to the lower pull rod, and a guide shoe is provided at the end of the lower pull rod away from the skewer mandrel sleeve. A skewer mandrel is disposed inside the skewer mandrel sleeve, and a skewer mechanism is disposed between the skewer mandrel and the lower pull rod. The skewer mechanism includes a pressure spring, a pressure platform, and a stop post disposed at the end of the lower pull rod. The pressure platform is axially elastically connected to the skewer mandrel via the pressure spring. A pressure block is disposed between the stop post and the pressure platform, and the pressure block is rotatably connected to the skewer mandrel, with the stop post abutting against the pressure block. It can be used in conjunction with a steel wire rope tool, lowered into an eccentric working cylinder, so that the guide shoe aligns with the side pockets of the eccentric working cylinder.

Description

Technical Field

[0001] This invention relates to the field of downhole oil development technology, and more specifically to a directional drilling tool. Background Technology

[0002] With the increasing intensity of gas field exploitation in my country, long-term gas field operation leads to the accumulation of large amounts of water and liquid within the fields. The presence of this water and liquid is extremely detrimental to later stages of gas field development. If the accumulated water and liquid are not drained in a timely manner, it will severely impact natural gas extraction efficiency, and in severe cases, may even render these gas fields unusable. Drainage gas production technology is the most effective method for resolving the accumulation of water and liquid within gas fields, and it is also a common technology in water-driven gas field production.

[0003] Prolonged downhole operation of drop-and-retrieve gas lift valves may lead to leaks in the sealing mechanism, necessitating valve replacement. Removing the original well tubing for valve replacement could damage the gas-tight tubing during disassembly, resulting in economic losses and extended operation time. This also poses a serious safety hazard to on-site operations. Drop-and-retrieve operations using a wire rope lowering the directional drilling tool allow for recovery and deployment of the gas lift valve without moving the tubing. Summary of the Invention

[0004] This invention proposes a guided tilting tool to solve the technical problem of difficulty in recovering and deploying air lift valves.

[0005] To solve the above-mentioned technical problems, the present invention provides a guiding tilting tool, which is characterized in that it includes an upper pull rod, a tilting mandrel sleeve, a tilting mandrel, a lower pull rod, and a guide shoe;

[0006] One end of the upper pull rod is used to connect to the steel wire rope, and the other end of the upper pull rod is detachably connected to one end of the inclined mandrel sleeve. The other end of the inclined mandrel sleeve is rotatably connected to the lower pull rod, and a guide shoe is provided at the end of the lower pull rod away from the inclined mandrel sleeve.

[0007] An inclination mandrel is provided inside the outer sleeve of the inclination mandrel, and an inclination mechanism is provided between the inclination mandrel and the pull rod;

[0008] The tilting mechanism includes a pressure spring, a pressure platform, and a stop post disposed at the end of the pull rod;

[0009] The pressure platform is axially elastically connected to the orthopedic mandrel via the pressure platform spring. A pressure block is provided between the abutment and the pressure platform. The pressure block is rotatably connected to the orthopedic mandrel, and the abutment abuts against the pressure block.

[0010] Preferably, it further includes a guide mechanism for moving along a guide groove inside the eccentric working cylinder, the guide mechanism being disposed in the guide key receiving groove of the skew mandrel;

[0011] The guiding mechanism includes a guide key, which is rotatably connected to the orthopedic mandrel. The guide key is radially connected to the orthopedic mandrel via a return spring. When the guide key rotates, it compresses the return spring to retract into the orthopedic mandrel.

[0012] Preferably, the guide key is further provided with a release keyway, and a release key is provided in the release keyway. One side of the release key is connected to the guide key through a first steel pin, and the other side of the release key is connected to the guide key through a breakable copper pin. The guide key is also provided with a guide bevel.

[0013] Preferably, the guide shoe is rotatably connected to the pull rod via a second steel pin. When the guide shoe and the pull rod are in a horizontal state, the cross sections of the guide shoe and the pull rod form a first inclined angle. A steel ball is provided at the opening near the first angle, and the steel ball is axially elastically connected to the pull rod via a steel ball spring.

[0014] Preferably, the abutment is arc-shaped, and the pressure block is provided with a boss for limiting the position of the abutment.

[0015] Preferably, when the skating mandrel and the pull rod are in a horizontal state, the end faces of the skating mandrel and the pull rod form a second skating angle.

[0016] Preferably, the angles of the first and second inclination angles are both 8° to 15°.

[0017] Preferably, the angle of the first inclined plane and the angle of the second inclined plane are the same.

[0018] Preferably, the upper pull rod is connected to the outer sleeve of the inclined mandrel via a thread.

[0019] The beneficial effects of this invention include at least the following: It provides a precise guiding tilting tool that can be used in conjunction with a standard wire rope tool. Lowered into an eccentric working cylinder, it guides the tool string to adjust its phase, providing a tilting angle consistent with the eccentricity of the side bags in the working cylinder, thus guiding the guide shoe to align with the eccentric side bags of the working cylinder. The tool is simple to use, provides reliable tilting, shortens the drop-off and retrieval operation time, and eliminates safety risks. Attached Figure Description

[0020] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0022] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 for Figure 1 Enlarged structural diagram at point B;

[0024] Figure 5 for Figure 1 Enlarged structural diagram at point C;

[0025] In the diagram, 1-upper pull rod; 2-skew mandrel sleeve; 3-skew mandrel; 4-lower pull rod; 5-guide shoe; 6-skew mechanism; 7-pressure table spring; 8-pressure table; 9-pressure block; 10-stop post; 11-guide mechanism; 12-guide key receiving groove; 13-guide key; 14-guide inclined surface; 15-reset spring; 16-release keyway; 17-release key; 18-first steel pin; 19-breakable copper pin; 20-second steel pin; 21-first skew angle; 22-steel ball; 23-steel ball spring; 24-bore; 25-second skew angle. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0027] like Figure 1-2 As shown, this embodiment of the invention provides a guiding tilting tool, including an upper pull rod 1, a tilting mandrel sleeve 2, a tilting mandrel 3, a lower pull rod 4, and a guide shoe 5;

[0028] One end of the upper pull rod 1 is used to connect to the wire rope, and the other end of the upper pull rod 1 is connected to one end of the inclined mandrel sleeve 2 by a thread. The other end of the inclined mandrel sleeve 2 is rotatably connected to the lower pull rod 4. A guide shoe 5 is provided at the end of the lower pull rod 4 away from the inclined mandrel sleeve 2. An inclined mandrel 3 is provided inside the inclined mandrel sleeve 2, and an inclined mechanism 6 is provided between the inclined mandrel 3 and the lower pull rod 4.

[0029] The skew-forming mechanism 6, as described above Figure 3 As shown, it includes a pressure spring 7, a pressure table 8, and a stop post 10 disposed at the end of the pull rod 4;

[0030] The pressure platform 8 is axially elastically connected to the directional mandrel 3 via the pressure platform spring 7. A pressure block 9 is provided between the abutment column 10 and the pressure platform 8. The pressure block 9 is rotatably connected to the directional mandrel 3, and the abutment column 10 abuts against the pressure block 9. In this way, the steel wire rope can vibrate upwards, which can generate an axial upward force on the guiding directional tool. At this time, the pull rod 4 can rotate counterclockwise. Since the abutment column 10 abuts against the pressure block 9, it drives the pressure block 9 to rotate counterclockwise. When the pressure block 9 rotates counterclockwise, it can compress the pressure platform spring 7, thereby forming a certain angle between the pull rod and the directional mandrel 3 to complete the directional movement.

[0031] Furthermore, the embodiments of the present invention also include a guide mechanism 11 for moving along the guide groove inside the eccentric working cylinder, the guide mechanism 11 being disposed in the guide key receiving groove 12 of the skew mandrel 3;

[0032] The guiding mechanism 11 includes a guide key 13, which is rotatably connected to the orthogonal mandrel 3. The guide key 13 is radially elastically connected to the orthogonal mandrel 3 via a return spring 15. Rotation of the guide key 13 compresses the return spring 15, causing it to retract into the orthogonal mandrel 3. Thus, when the external space decreases, the return spring 15 can compress the guide key 13, causing it to retract close to the orthogonal mandrel 3, allowing it to pass smoothly. When the external space increases, the guide key 13 can be ejected. Through the cooperation of the guide key and the guide groove inside the eccentric working cylinder, the tube string can be guided into the eccentric working cylinder at a suitable phase.

[0033] Furthermore, the guide key 13 is also provided with a release keyway 16, and a release key 17 is provided in the release keyway 16. One side of the release key 17 is connected to the guide key 13 through a first steel pin 18, and the other side of the release key 17 is connected to the guide key 13 through a breakable copper pin 19. The guide key 13 is also provided with a guide ramp 14. In this way, when the tubing string is adjusted to the phase corresponding to the working cylinder side bag, the release key 17 can be more easily inserted into the corresponding working cylinder side bag to complete the positioning work. At this time, the steel wire rope can be vibrated upward to cut the breakable copper pin 19, so that after the positioning work is completed, the guide key 13 can retract within the small inner diameter oil pipe.

[0034] Furthermore, the guide shoe 5 is rotatably connected to the pull rod 4 via a second steel pin 20. When the guide shoe 5 and the pull rod 4 are in a horizontal state, the cross sections of the guide shoe 5 and the pull rod 4 form a first angle 21. A steel ball 22 is provided near the opening of the first angle, and the steel ball 22 is axially elastically connected to the pull rod 4 via a steel ball spring 23. In this way, through the steel ball 22, the steel ball spring 23, and the first angle 21, the guide shoe 5 can also produce an angle-creating function. By compressing the steel ball 22, the movement of the steel ball spring 23 is driven, reducing the angle of the first angle 21, so that the guide shoe 5 and the pull rod 4 also produce a certain angle.

[0035] Furthermore, the abutment 10 is arc-shaped, and the pressure block 9 is provided with a boss 24 for limiting the position of the abutment 10. In this way, the boss 24 can limit the abutment 10 when it rotates; when the external shrinkage makes it difficult to pass, the arc-shaped abutment 10 can be better reset.

[0036] Furthermore, when the skew mandrel 3 and the pull rod 4 are in a horizontal state, the end faces of the skew mandrel 3 and the pull rod 4 form a second skew angle 25.

[0037] Furthermore, both the first angle 21 and the second angle 25 are between 8° and 15°. This 8° to 15° angle range better meets the requirements for tilting.

[0038] Furthermore, the angles of the first angled inclination 21 and the second angled inclination 25 are the same. Because the first angled inclination 21 and the second angled inclination 25 are the same, at the maximum degree of inclination, both parts are offset by the same angle, thus making the guide shoe and the inclination tool parallel to each other. This allows for better alignment with the side bag of the eccentric working cylinder, resulting in a better retrieval operation.

[0039] In this embodiment of the invention, during the well completion stage, the gas lift valve is lowered to the bottom of the well along with the eccentric working cylinder and the well is completed. In the later stages of gas well production, due to increased fluid accumulation in the well, it is necessary to inject gas through the casing to open the gas lift valve for drainage and gas production in order to increase production. Because the gas lift valve may fail due to prolonged time spent at the bottom of the well, it needs to be removed and replaced. To ensure construction safety, the gas lift valve is retrieved using a tool lowered with a wire rope while the tubing string remains stationary. The wire rope tool connects the retrieval tool to the guide directional drilling tool of this embodiment of the invention.

[0040] When the wire rope reaches the predetermined depth, it is pulled up and vibrated upwards to cut the breakable copper pin 19. At this time, the guide key 13 can be pulled back into the tubing through the upward movement. During the upward vibration, the pull rod 4 moves along the inclined surface of the lower end of the directional drilling mandrel 3 and drives the guide shoe 5 upwards. The guide shoe 5 is restricted by the inner diameter of the eccentric working cylinder and squeezes the steel ball 22 along the first directional drilling angle. The tubing string is lowered, and the retrieval tool retrieves the gas lift valve. During the upward lifting process, the inner diameter of the eccentric working cylinder shrinks to the inner diameter of the tubing, and the reduced space squeezes the pull rod 4. Under the action of the pressure spring 7 and the steel ball spring 23, the pull rod 4 and the guide shoe 5 return to their original relative positions for easy removal. Conversely, the same principle is used to deploy the gas lift valve. The wire rope connects the directional drilling tool, the well delivery tool, and the gas lift valve and is lowered together. After reaching the target depth, the upward directional drilling is performed. Then the tubing string is lowered, and the gas lift valve is seated and sealed in the side pocket of the eccentric working cylinder.

[0041] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; only preferred embodiments of the present invention are illustrated. The descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. As long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0042] It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of this invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A tool for guiding skewness formation, characterized in that: It includes an upper pull rod (1), a slant mandrel sleeve (2), a slant mandrel (3), a lower pull rod (4), and a guide shoe (5); One end of the upper pull rod (1) is used to connect the wire rope, and the other end of the upper pull rod (1) is detachably connected to one end of the inclined mandrel sleeve (2). The other end of the inclined mandrel sleeve (2) is rotatably connected to the lower pull rod (4). A guide shoe (5) is provided at the end of the lower pull rod (4) away from the inclined mandrel sleeve (2). An inclined mandrel (3) is provided inside the outer sleeve (2) of the inclined mandrel, and an inclined mechanism (6) is provided between the inclined mandrel (3) and the pull rod (4); The tilting mechanism (6) includes a pressure spring (7), a pressure table (8), and a stop (10) disposed at the end of the pull rod (4); The pressure table (8) is axially elastically connected to the inclined mandrel (3) via the pressure table spring (7). A pressure block (9) is provided between the abutment (10) and the pressure table (8). The pressure block (9) is rotatably connected to the inclined mandrel (3). The abutment (10) abuts against the pressure block (9). It also includes a guide mechanism (11) for moving along the guide groove inside the eccentric working cylinder, the guide mechanism (11) being disposed in the guide key receiving groove (12) of the skew mandrel (3); The guiding mechanism (11) includes a guiding key (13), which is rotatably connected to the orthopedic mandrel (3). The radial direction of the guiding key (13) and the orthopedic mandrel (3) is elastically connected by a return spring (15). The guiding key (13) rotates to compress the return spring (15) to retract into the orthopedic mandrel (3). The upper pull rod (1) is connected to the outer sleeve (2) of the inclined mandrel by a thread.

2. The guiding tilting tool according to claim 1, characterized in that: The guide key (13) is also provided with a release key groove (16), and a release key (17) is provided in the release key groove (16). One side of the release key (17) is connected to the guide key (13) through a first steel pin (18), and the other side of the release key (17) is connected to the guide key (13) through a breakable copper pin (19). The guide key (13) is also provided with a guide slope (14).

3. The guiding tilting tool according to claim 1, characterized in that: The guide shoe (5) is rotatably connected to the pull rod (4) via a second steel pin (20). When the guide shoe (5) and the pull rod (4) are in a horizontal state, the cross sections of the guide shoe (5) and the pull rod (4) form a first inclined angle (21). A steel ball (22) is provided at the opening near the first angle. The steel ball (22) is axially elastically connected to the pull rod (4) via a steel ball spring (23).

4. The guiding tilting tool according to claim 3, characterized in that: The abutment (10) is arc-shaped, and the pressure block (9) is provided with a boss (24) for limiting the position of the abutment (10).

5. A guide for directional drilling according to claim 4, characterized in that: When the skewing mandrel (3) and the pull rod (4) are in a horizontal state, the end faces of the skewing mandrel (3) and the pull rod (4) form a second skewing angle (25).

6. A guide for skew formation according to claim 5, characterized in that: The angles of the first inclined plane (21) and the second inclined plane (25) are both 8° to 15°.

7. A guide for directional drilling according to claim 6, characterized in that: The angle of the first inclined plane (21) is the same as the angle of the second inclined plane (25).

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