A tool for mechanically adjusting the tool face angle of a directional drilling tool

Abstract

The application discloses a tool for adjusting a tool face angle of a directional drilling tool in a full mechanical mode, and relates to the technical field of drilling. The main structure comprises an outer pipe body, a stator rotating pipe, a rotor rotating pipe, a torque transmission joint, a sealing joint, a suspension single-acting mechanism, a sealing element and a reset spring. One end of the outer pipe body is connected with a drilling tool. The other end of the outer pipe body is connected with the sealing joint. The reset spring is arranged in the outer pipe body. The stator rotating pipe is arranged in the outer pipe body. One end of the rotor rotating pipe extends into the outer pipe body. The suspension single-acting mechanism is arranged between the outer pipe body and the rotor rotating pipe. One end of the torque transmission joint is connected with the rotor rotating pipe, and the other end of the torque transmission joint is connected with the drilling tool. The sealing element is arranged between the sealing joint and the rotor rotating pipe. The tool for adjusting the tool face angle of the directional drilling tool in the full mechanical mode can realize step-by-step adjustment of a tool face angle of a downhole directional drilling tool combination through the mode of pressing down and lifting up the drilling tool, so that the tool face angle adjustment is easier, higher in precision, better in stability and stronger in operability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drilling technology, in particular to a tool for mechanically adjusting the tool face angle of a directional drilling tool. BACKGROUND

[0002] With the rapid development of drilling technology and the need for exploration and development of underground energy resources such as oil and gas, geothermal energy, directional drilling technology has gradually developed into an extremely important technology in oil and gas, geological drilling. The advantages of directional drilling are also very obvious: ① Ensure that the wellbore is drilled to the target area according to the designed well trajectory; ② When the downhole drilling encounters complex situations that are difficult to solve, sidetracking and obstacle avoidance based on directional technology; ③ High-angle directional wells or horizontal wells effectively increase the contact area of the wellbore and the fluid in the target formation; ④ When the target reservoir is not suitable for building a well site to carry out drilling operations, a nearby site is selected to build an entrance for directional drilling to the target reservoir.

[0003] Currently, directional drilling mainly uses downhole power drilling tools with bent sub or uses bent housing downhole power drilling tools. The upper side of the power drilling tool is connected to a non-magnetic drilling tool, and the non-magnetic drilling tool is fixedly placed with MWD and other logging while drilling tools to measure and transmit parameters such as inclination, azimuth, well temperature, tool face angle, etc. in real time. During directional drilling, the tool face angle of the bent sub or bent housing power drilling tool is generally adjusted to achieve directional operations such as inclination reduction, inclination increase, azimuth reduction, azimuth increase, etc., to ensure that the well trajectory is as consistent as possible with the design plan. Currently, the tool face angle of the downhole power drilling tool is adjusted by rotating the lower drilling tool driven by the surface rotary table or top drive power equipment, combined with the real-time feedback of the tool face angle data from the MWD. For shallow wells with small inclination, the effect of adjusting the tool face angle by rotating the full well drilling tool is good, and the operability is also strong. However, for deep wells or wells with larger inclination, due to the long drilling tool and large counter-torque, the operability of adjusting the tool face angle by rotating the full well drilling tool is extremely poor, and it may take hours to adjust the tool face angle. At the same time, due to the counter-torque of the drilling tool, the adjusted tool face angle changes when the drilling tool is under pressure. Therefore, the existing method of adjusting the tool face angle by rotating the full well drilling tool has poor practicality and low tool face angle stability. SUMMARY

[0004] To solve the above technical problems, the present application provides a tool for mechanically adjusting the tool face angle of a directional drilling tool, which solves the problem of difficult adjustment of the tool face angle of a directional drilling tool during directional drilling, especially directional drilling in high-angle deep wells.

[0005] To achieve the above-mentioned purposes, the present application provides the following solutions:

[0006] The application provides a tool for mechanically adjusting a tool face angle of a directional drilling tool, which comprises an outer tube, a stator rotating tube, a rotor rotating tube, a torque transmission joint, a sealing joint, a suspension single-action mechanism, a sealing element and a reset spring; a tapered inner thread is arranged on an inner wall of one end of the outer tube, and the tapered inner thread is used for connecting with the drilling tool; an inner thread is arranged on an inner wall of the other end of the outer tube, and the inner thread is used for connecting with an outer wall of the sealing joint; the reset spring is arranged in the outer tube and close to one end of the tapered inner thread; the stator rotating tube is arranged in the outer tube, and one end of the stator rotating tube is limitingly connected with the reset spring; the outer tube is guidingly connected with the stator rotating tube; one end of the rotor rotating tube extends into the outer tube, and one end of the rotor rotating tube is rotationally connected with the other end of the stator rotating tube; the suspension single-action mechanism is arranged between the outer tube and the rotor rotating tube; one end of the torque transmission joint is connected with the rotor rotating tube, and the other end of the torque transmission joint is used for connecting with the drilling tool; the sealing element is arranged between the sealing joint and the rotor rotating tube.

[0007] Optionally, the inner wall of the outer tube is sequentially provided with a tapered inner thread section, a transition section, an axial limiting section, a key groove section, a movable cavity section, a bearing cavity section and an inner thread section from one end to the other end; the tapered inner thread section is provided with the tapered inner thread; the diameter of the transition section gradually decreases from the tapered inner thread section to the axial limiting section; the diameter of the axial limiting section is greater than the minimum diameter of the transition section, and the axial limiting section is used for limiting the axial displacement of the reset spring; a plurality of tube key grooves are uniformly arranged on the inner side wall of the key groove section in the circumferential direction, and the keys of the plurality of tube key grooves are provided with a first inclined surface towards one end of the movable cavity section; the plurality of tube key grooves are matched with the stator rotating tube, so as to realize the axial sliding of the stator rotating tube and prevent the stator rotating tube from rotating; the diameter of the movable cavity section is greater than the diameter of the key groove section; the diameter of the bearing cavity section is greater than the diameter of the movable cavity section, and the bearing cavity section is used for mounting the suspension single-action mechanism; and the inner thread section is provided with the inner thread.

[0008] Optionally, one end of the stator rotating tube is a circular tube with a smaller outer diameter, the other end of the stator rotating tube is a circular tube with a larger outer diameter, a plurality of stator key grooves are arranged on the outer wall of the other end of the stator rotating tube, the plurality of stator key grooves are matched with the outer tube, so as to realize the axial sliding of the stator rotating tube and prevent the stator rotating tube from rotating; and a sawtooth structure is arranged on the end face of the other end of the stator rotating tube and uniformly distributed in the circumferential direction, and the sawtooth structure is matched with the end portion of the rotor rotating tube.

[0009] Optionally, a plurality of mover key grooves are arranged on the outer wall of one end of the mover rotating pipe, and the key part of the plurality of mover key grooves is provided with a second inclined surface towards one end of the stator rotating pipe; the key part of the plurality of mover key grooves is provided with an outwardly extending limiting part away from one end of the stator rotating pipe; a plurality of through holes are arranged on the middle part of the mover rotating pipe in the circumferential direction; the other end of the mover rotating pipe is provided with a thread connected with the torque transmission joint.

[0010] Optionally, a plurality of stator key grooves are arranged on the outer wall of the stator rotating pipe, and the number of the mover key grooves arranged on the outer wall of the mover rotating pipe is half of the number of the stator key grooves.

[0011] Optionally, the length of the mover key groove is less than the length of the stator key groove.

[0012] Optionally, one end of the key part of the plurality of pipe body key grooves is provided with a first inclined surface, and the direction of the second inclined surface is opposite to the direction of the first inclined surface.

[0013] Optionally, the suspension single-action mechanism comprises two thrust bearings and two ball bearings; the two ball bearings are arranged in the middle part, and the two thrust bearings are respectively located on the two sides of the two ball bearings.

[0014] Optionally, the sealing element comprises two groups of high-temperature-resistant sealing rings.

[0015] Optionally, the reset spring is a spiral spring.

[0016] The present application has the following technical effects relative to the prior art:

[0017] The tool for adjusting the tool face angle of the directional drilling tool in the present application realizes the stepwise adjustment of the tool face angle of the downhole directional drilling tool combination by the mechanical mode of pressing down and lifting up the drilling tool, so that the tool face angle adjustment is easier, more accurate, more stable and more operable. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 FIG. 1 is a structural schematic diagram of the tool for adjusting the tool face angle of the directional drilling tool in the present application;

[0020] Figure 2This is a cross-sectional view of the outer tube of the tool in the fully mechanical adjustable directional drilling tool face angle of the present invention;

[0021] Figure 3 This is a schematic diagram of the stator steering tube in the tool of the fully mechanical directional drilling tool face angle adjustment of the present invention;

[0022] Figure 4 This is a schematic diagram of the moving part steering tube in the tool face angle adjustment of the fully mechanical directional drilling tool of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Outer tube; 2. Stator rotating tube; 3. Mover rotating tube; 4. Torque transmission joint; 5. Sealing joint; 6. Suspension single-action mechanism; 61. Thrust bearing; 62. Ball bearing; 7. Seal; 8. Return spring. Detailed Implementation

[0024] 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 scope of protection of the present invention.

[0025] like Figures 1 to 4 As shown, this embodiment provides a fully mechanical tool for adjusting the tool face angle of a directional drilling tool, including an outer tube 1, a stator rotating tube 2, a mover rotating tube 3, a torque transmission joint 4, a sealing joint 5, a suspension single-action mechanism 6, a seal 7, and a return spring 8; a tapered internal thread is provided on the inner wall of one end of the outer tube 1 for connection with the drilling tool; an internal thread is provided on the inner wall of the other end of the outer tube 1 for connection with the outer wall of the sealing joint 5; the return spring 8 is located inside the outer tube 1 near the tapered internal thread; the stator rotating tube... 2 is installed inside the outer tube 1, and one end of the stator rotating tube 2 is limited and connected to the return spring 8; the inner wall of the outer tube 1 and the stator rotating tube 2 are connected to prevent rotation; one end of the mover rotating tube 3 extends into the outer tube 1, and one end of the mover rotating tube 3 is guided and connected to the other end of the stator rotating tube 2; the suspension single-action mechanism 6 is installed between the outer tube 1 and the mover rotating tube 3; one end of the torque transmission joint 4 is connected to the mover rotating tube 3, and the other end of the torque transmission joint 4 is used to connect to the drill bit; the sealing element 7 is installed between the sealing joint 5 and the mover rotating tube 3.

[0026] In the embodiment, the inner wall of the outer tube body 1 is sequentially provided with a conical internal thread section, a transition section, an axial limiting section, a key groove section, a movable cavity section, a bearing cavity section and an internal thread section from one end to the other end; the conical internal thread section is provided with a conical internal thread; the diameter of the transition section gradually decreases from the conical internal thread section to the axial limiting section; the diameter of the axial limiting section is greater than the minimum diameter of the transition section, and the axial limiting section is used for limiting the axial displacement of the return spring 8; the inner side wall of the key groove section is uniformly provided with a plurality of tube body key grooves in the circumferential direction, and the keys of the plurality of tube body key grooves are provided with a first inclined surface towards one end of the movable cavity section; the plurality of tube body key grooves are matched with the stator rotating tube 2, and are used for realizing the axial sliding of the stator rotating tube 2 and preventing the rotation of the stator rotating tube 2; the diameter of the movable cavity section is greater than the diameter of the key groove section; the diameter of the bearing cavity section is greater than the diameter of the movable cavity section, and the bearing cavity section is used for mounting the suspension single-acting mechanism 6; and the internal thread section is provided with an internal thread.

[0027] One end of the stator rotating tube 2 is a circular tube with a smaller outer diameter, the other end of the stator rotating tube 2 is a circular tube with a larger outer diameter, the outer wall of the other end of the stator rotating tube 2 is provided with a plurality of stator key grooves, and the plurality of stator key grooves are used for matching with the outer tube body 1, and are used for realizing the axial sliding of the stator rotating tube 2 and preventing the rotation of the stator rotating tube 2; the end face of the other end of the stator rotating tube 2 is provided with a sawtooth structure uniformly distributed in the circumferential direction, and the sawtooth structure is used for matching with the end portion of the rotor rotating tube 3.

[0028] The outer wall of one end of the rotor rotating tube 3 is provided with a plurality of rotor key grooves, and the keys of the plurality of rotor key grooves are provided with a second inclined surface towards one end of the stator rotating tube 2; the keys of the plurality of rotor key grooves are provided with a limiting portion extending outward away from one end of the stator rotating tube 2; the middle portion of the rotor rotating tube 3 is provided with a plurality of through holes in the circumferential direction, which are used for balancing the pressure between the inner cavity of the rotor rotating tube 3 and the annular cavity formed by the upper outer tube body 1 and the rotor rotating tube 3, and simultaneously enabling the fluid in the tube to lubricate and cool the suspension single-acting mechanism 6; the other end of the rotor rotating tube 3 is provided with a thread connected with the torque transmission joint 4.

[0029] The stator rotating tube 2 is provided with a plurality of stator key grooves, and the number of the rotor key grooves on the outer wall of the rotor rotating tube 3 is half of the number of the stator key grooves.

[0030] The length of the rotor key groove is less than the length of the stator key groove.

[0031] One end of the keys of the plurality of tube body key grooves is provided with a first inclined surface, and the direction of the second inclined surface is opposite to the direction of the first inclined surface.

[0032] The torque transmission joint 4 is a hollow pipe made of high-strength metal, and has threaded fasteners at both ends. The left end is connected with the right end of the rotor rotating pipe 3 through threaded connection, and the right end has a drill rod fastener male fastener which can be connected with a drill collar. The left end of the torque transmission joint 4 is provided with a variable diameter, and the outer diameter is greater than the outer diameter of the rotor rotating pipe 3 and less than the inner diameter of the sealing joint 5.

[0033] The sealing joint 5 is a hollow pipe made of metal, and has a threaded fastener male fastener at the left end which is connected with the female fastener of the right end of the outer pipe body 1 through threaded connection. The inner wall of the sealing joint 5 is provided with two sealing ring grooves for installing the sealing member 7.

[0034] The suspension single-acting mechanism 6 includes two thrust bearings 61 and two ball bearings 62. The two ball bearings 62 are arranged in the middle, and the two thrust bearings 61 are respectively arranged on the two sides of the two ball bearings 62. The thrust bearing 61 is mainly used for suspending the rotor rotating pipe 3, and the inner diameter is slightly larger than the outer diameter of the right end of the rotor rotating pipe 3 and smaller than the outer diameter of the key of the left end of the rotor rotating pipe 3. The inner ring of the ball bearing 62 is in clearance fit with the rotor rotating pipe 3, and is mainly used for reducing the radial movement of the rotor rotating pipe 3, while ensuring that the rotor rotating pipe 3 and the upper outer pipe body 1 are in single-acting state.

[0035] The sealing member 7 includes two groups of high-temperature-resistant sealing rings, which are arranged in the two sealing ring grooves inside the sealing joint 5 and interact with the rotor rotating pipe 3 to form a seal for the inner cavity of the upper outer pipe body 1.

[0036] The reset spring 8 is a spiral spring. The reset spring 8 is arranged inside the upper outer pipe body 1, and is concentrically arranged outside the small outer diameter pipe body at the left end of the stator rotating pipe 2. The inner diameter of the reset spring 8 is slightly larger than the outer diameter of the small outer diameter pipe body at the left end of the stator rotating pipe 2, and the outer diameter of the reset spring 8 is smaller than the inner diameter of the pipe body at the left end of the key groove of the upper outer pipe body 1. The small outer diameter pipe body at the left end of the stator rotating pipe 2 serves as a guide for the reset spring 8, so that the stator rotating pipe 2 moves to the left and compresses the reset spring 8.

[0037] In the working condition of the bottom hole pressure, the rotator tube 3 is connected with the torque transmission joint 4 and the rotator tube 3 is located in the key groove in the upper outer tube body 1; when it is needed to adjust the tool face angle of the downhole directional drilling tool and to carry out the sliding drilling, the drilling tool can be lifted and lifted away from the bottom hole, under the action of the reset spring 8, the stator tube 2 and the rotator tube 3 are lowered together until the left end of the rotator tube 3 is hung on the upper end of the suspension single-acting mechanism 6, in the process of lowering, the stator tube 2 pushes the rotator tube 3 to lower and rotate at a small angle until the key inclined surface is just opposite to the right end inclined surface of the key groove in the upper outer tube body 1; at this time, the rotator tube 3 is separated from the key groove in the upper outer tube body 1. The bottom drilling tool can be pressed by the winch controlled by the driller, at this time, the power rotating tube and the torque transmission joint 4 are raised relative to the upper outer tube body 1, the left end (i.e. the upper end) of the rotator tube 3 and the right end (i.e. the lower end) of the key groove of the upper outer tube body 1 interact, thereby driving the rotator tube 3 and the torque transmission joint 4 to rotate clockwise (as viewed from above), until the key of the rotator tube 3 is parallel to the key groove in the upper outer tube body 1, the rotator tube 3 continues to rise under the action of the drilling pressure until the n / 2 key enters the key groove in the upper outer tube body 1 and continues to rise, until the left end of the torque transmission joint 4 is limited by the contact between the diameter reducing inclined surface and the right end plane of the sealing joint 5. At this time, the power rotating tube and the torque transmission joint 4 have rotated 360° / n clockwise relative to the upper outer tube body 1. When it is needed to continue to adjust the tool face angle, the above steps can be repeated to continue to lift the drilling tool away from the bottom hole and to press again, so as to continue to adjust 360° / n clockwise. Wherein, n is the number of the tube key grooves in the outer tube body and the number of the stator key grooves, and n / 2 is the number of the rotator key grooves.

[0038] Due to the cooperation between the power rotating tube and the key groove of the upper outer tube body 1, when it is needed to carry out the composite drilling, the upper drilling tool drives the upper outer tube body 1 to rotate, and under the cooperation of the key groove, the upper outer tube body 1 drives the power rotating tube and the lower torque transmission joint 4 to rotate, and the torque transmission joint 4 drives the lower downhole directional drilling tool assembly to rotate. When it is needed to carry out the sliding drilling, since the tool is installed on the upper part of the non-magnetic drill collar and the lower part of the non-magnetic drill collar is the downhole power tool for driving the drill bit to rotate, the pressurization of the lower drilling tool and the rotation of the drill bit are not affected. Therefore, the tool can meet the needs of the sliding directional drilling and the composite drilling.

[0039] In the specification, "left" and "right" are relative to the directions in the drawings. Figure 1

[0040] ​It is to be understood that the application is not limited to the details of the above-exemplified embodiments and that the present application can be carried out in other ways without deviating from the sprit or essential characteristics of the application. Therefore, the embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein and are meant to be covered by the claims. No limitation is intended to the details of construction or design herein shown, other than as described in the claims.

[0041] The principles and implementations of the present application are described in the specification, the above examples are only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in specific implementation and application range. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A fully mechanical tool for adjusting the tool face angle of a directional drilling tool, characterized in that, The system includes an outer tube, a stator rotating tube, a mover rotating tube, a torque transmission joint, a sealing joint, a suspension single-action mechanism, a seal, and a return spring. One end of the outer tube has a tapered internal thread on its inner wall for connection with a drilling tool. The other end of the outer tube has an internal thread for connection with the outer wall of the sealing joint. The inner wall of the outer tube includes a movable cavity section. Multiple tube keyways are evenly distributed circumferentially on the inner wall of the outer tube, and the key portion of each keyway has a first inclined surface facing the movable cavity section. The return spring is located within the outer tube near the tapered internal thread. The stator rotating tube is located within the outer tube, and one end of the stator rotating tube is connected to the return spring for limiting connection. A guide connection exists between the inner wall of the outer tube and the stator rotating tube. One end of the mover rotating tube... The moving part extends into the outer tube body, and one end of the moving part is anti-rotationally connected to the other end of the stator rotating part; the end face of the other end of the stator rotating part is provided with a serrated structure evenly distributed circumferentially, which is used to match the end of the moving part; the suspension single-action mechanism is provided between the outer tube body and the moving part; one end of the torque transmission joint is connected to the moving part, and the other end of the torque transmission joint is used to connect to the drill bit; a plurality of moving part keyways are provided on the outer wall of one end of the moving part, and the key portion of the plurality of moving part keyways is provided with a second inclined surface facing the end of the stator rotating part; the orientation of the second inclined surface is opposite to the orientation of the first inclined surface; the key of the moving part can be embedded in the keyway inside the outer tube body; the sealing element is provided between the sealing joint and the moving part.

2. The tool for adjusting the face angle of a fully mechanical directional drilling tool according to claim 1, characterized in that, The inner wall of the outer tube consists of, from one end to the other, a tapered internal thread section, a transition section, an axial limiting section, a keyway section, a movable cavity section, a bearing cavity section, and an internal thread section. The tapered internal thread section is provided with the tapered internal thread; The diameter of the transition section gradually decreases from the tapered internal thread section to the axial limiting section; The diameter of the axial limiting section is larger than the minimum diameter of the transition section, and the axial limiting section is used to limit the axial displacement of the return spring. The multiple tube keyways of the keyway segment are matched with the stator rotating tube to enable axial sliding of the stator rotating tube and prevent the stator rotating tube from rotating. The diameter of the movable cavity section is larger than the diameter of the keyway section; The diameter of the bearing cavity is larger than the diameter of the movable cavity, and the bearing cavity is used to install the suspension single-action mechanism; The internal thread section is provided with the internal thread.

3. The tool for adjusting the face angle of a fully mechanical directional drilling tool according to claim 1, characterized in that, One end of the stator rotating tube is a circular tube with a smaller outer diameter, and the other end of the stator rotating tube is a circular tube with a larger outer diameter. Multiple stator keyways are provided on the outer wall of the other end of the stator rotating tube. The multiple stator keyways are used to match the outer tube body to realize the axial sliding of the stator rotating tube and prevent the stator rotating tube from rotating.

4. The tool for adjusting the face angle of a fully mechanical directional drilling tool according to claim 1, characterized in that, The key portion of the plurality of mover keyways has an outwardly extending limiting portion at the end away from the stator rotating tube; the middle part of the mover rotating tube has a plurality of through holes along the circumferential direction; the other end of the mover rotating tube has a thread for connection with the torque transmission joint.

5. The tool for adjusting the face angle of a fully mechanical directional drilling tool according to claim 1, characterized in that, The outer wall of the stator rotating tube is provided with a plurality of stator keyways, and the number of mover keyways provided on the outer wall of the mover rotating tube is half the number of stator keyways.

6. The tool for adjusting the face angle of a fully mechanical directional drilling tool according to claim 5, characterized in that, The length of the moving keyway is less than the length of the stator keyway.

7. The tool for adjusting the face angle of a fully mechanical directional drilling tool according to claim 1, characterized in that, The suspension single-action mechanism includes two thrust bearings and two ball bearings; the two ball bearings are located in the middle, and the two thrust bearings are located on both sides of the two ball bearings.

8. The tool for adjusting the face angle of a fully mechanical directional drilling tool according to claim 1, characterized in that, The sealing element includes two sets of high-temperature resistant sealing rings.

9. The tool for adjusting the face angle of a fully mechanical directional drilling tool according to claim 1, characterized in that, The return spring is a helical spring.

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