# US 12,110,794 B2 · Two-stage reverse-torque bent screw orientation tool

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- Number: US 12,110,794 B2
- Document ID: US12110794B2
- Status: Granted
- Kind: B2
- Application number: 18/463,876
- Filed: 2023-09-08
- Published: 2024-03-21
- Granted: 2024-10-08
- Earliest claimed: 2022-09-20
- Assignees: Chengdu University of Technology
- Applicants: Chengdu University of Technology
- Inventors: Qingyou Liu; Jianguo Zhao; Guorong Wang; Haiyan Zhu; Xuecheng Dong; Xingming Wang; Xu Luo; Yingju Pei; Xianwei Dai
- Web page: https://patentgrep.com/patent/US12110794B2

## CPC

- E21B 7/067: {with means for locking sections of a pipe or of a guide for a shaft in angular relation, e.g. adjustable bent sub}
- E21B 17/042: Threaded
- E21B 31/00: Fishing for or freeing objects in boreholes or wells
- E21B 34/066: {electrically actuated}
- E21B 47/06: Measuring temperature or pressure
- E21B 47/13: by electromagnetic energy, e.g. radio frequency
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

Provided is a two-stage reverse-torque bent screw orientation tool. An existing bent screw orientation technology has the technical problems of large friction resistance, difficult control of a borehole track, a low drilling speed and the like, and restricts economic, safe and long-acting development of oil and gas. In order to solve the above problems, the two-stage reverse-torque bent screw orientation tool is invented and composed of a first-stage clutch mechanism and a second-stage clutch mechanism, and the first-stage clutch mechanism and the second-stage clutch mechanism are both composed of a battery, a battery compartment, a pressure sensor, an electromagnetic valve, a body, a plug, a piston, an outer tooth cylinder, an inner tooth cylinder, a transmission cylinder, a connecting cylinder, a bearing, a limiting cylinder, a lower joint, a thrust bearing, a battery compartment, a circuit board, a cover plate and the like.

## Claims

### Claim 1

A two-stage reverse-torque bent screw orientation tool, composed of a first-stage clutch mechanism (100) and a second-stage clutch mechanism (200), wherein the first-stage clutch mechanism (100) and the second-stage clutch mechanism (200) are both composed of a fixing screw A (1), a battery plug (2), a cover plate (3), a circuit board (4), a battery (5), a battery compartment (6), a pressure sensor (7), an electromagnetic valve (8), a body (14), a plug (15), a fixing screw B (17), a piston (18), an outer tooth cylinder (20), an inner tooth cylinder (21), a transmission cylinder (22), a bearing A (23), a limiting cylinder (24), a bearing B (25), a lower joint (26), a connecting cylinder (27) and a diamond compact (28);
the lower joint (26) of the first-stage clutch mechanism (100) is in threaded connection with the battery compartment (6) of the second-stage clutch mechanism (200);
the battery compartment (6) is in threaded connection with the body (14), the body (14) is in threaded connection with an upper end of the inner tooth cylinder (21), and a lower end of the inner tooth cylinder (21) is in threaded connection with the limiting cylinder (24);
the plug (15) is in threaded connection with an upper end of the outer tooth cylinder (20), a spline A (2002) at a lower end of the outer tooth cylinder (20) is in splined connection with a spline B (2201) at an upper end of the transmission cylinder (22), a lower end of the transmission cylinder (22) is in threaded connection with an upper end of the connecting cylinder (27), and a lower end of the connecting cylinder (27) is in threaded connection with the lower joint (26);
a step A (2101) is machined on the inner tooth cylinder (21) for limiting a position of the outer tooth cylinder (20);
a step B (2003) is machined on the outer tooth cylinder (20) for being matched with the step A (2101) for limiting;
a bearing A (23) is assembled between the connecting cylinder (27) and the limiting cylinder (24);
a bearing B (25) is assembled between the connecting cylinder (27) and the body (14);
the piston (18) is assembled in a cavity formed by the plug (15) and the inner tooth cylinder (21), and the piston (18) is fixed on the body (14) through the fixing screw B (17); and
the pressure sensor (7) and the electromagnetic valve (8) are in threaded connection onto the body (14).

### Claim 2 (depends on 1)

The two-stage reverse-torque bent screw orientation tool according to claim 1, wherein the tool is composed of 2 to 4 first-stage clutch mechanisms (100) or second-stage clutch mechanisms (200) to meet requirements of different control precisions and drill rod rotating speeds.

### Claim 3 (depends on 1)

The two-stage reverse-torque bent screw orientation tool according to claim 1, wherein 4 to 8 battery mounting holes are machined in the battery compartment (6), and 4 to 8 batteries (5) are mounted to meet requirements of different electric energy.

### Claim 4 (depends on 1)

The two-stage reverse-torque bent screw orientation tool according to claim 1, wherein the cover plate (3) is composed of a signal channel (3001) and a cover plate body (3002), and the signal channel (3001) is made of a ceramic material and sintered on the cover plate body (3002) to provide the signal channel for wireless electromagnetic wave transmission.

### Claim 5 (depends on 1)

The two-stage reverse-torque bent screw orientation tool according to claim 1, wherein 1 to 3 radial through holes are machined in the inner tooth cylinder (21) for balancing an internal pressure of a cavity formed by the inner tooth cylinder (20) and the body (14); and 1 to 3 radial through holes (29) are machined in the limiting cylinder (24) for lubricating a bearing assembly (13) and balancing an internal pressure of a cavity formed by the limiting cylinder (24) and the body (14).

### Claim 6 (depends on 1)

The two-stage reverse-torque bent screw orientation tool according to claim 1, wherein an inner side and an outer side of the piston (18) are both provided with a combined sealing system of a dust ring (1801), a sealing ring (1802), and a supporting ring (1803) for isolating pressures of a piston upper hydraulic cavity (16) and a piston lower hydraulic cavity (19).

### Claim 7 (depends on 1)

The two-stage reverse-torque bent screw orientation tool according to claim 1, wherein a diamond compact (28) is sintered at a lower end of the body (14) and an upper end of the lower joint (26) to reduce a friction coefficient between the body (14) and the lower joint (26), thus improving wear resistance of the body (14) and the lower joint (26).

### Claim 8 (depends on 1)

The two-stage reverse-torque bent screw orientation tool according to claim 1, wherein a seam between an upper end of the limiting cylinder (24) and the outer tooth cylinder (20) is welded and fixed to prevent the limiting cylinder (24) from falling, so as to avoid a falling risk of the transmission cylinder (22) and the lower joint (26) caused by loosening of the limiting cylinder (24), thus further avoiding other drill tools from falling.

### Claim 9 (depends on 1)

The two-stage reverse-torque bent screw orientation tool according to claim 1, wherein the electromagnetic valve (8) is a two-position four-way electromagnetic valve, or an electromagnetic valve set capable of realizing the same function.

### Claim 10 (depends on 1)

The two-stage reverse-torque bent screw orientation tool according to claim 1, wherein rectangular teeth A (2102) are machined in an axial direction and a circumferential direction of the inner tooth cylinder (21), rectangular teeth B (2001) are machined in an axial direction and a circumferential direction of the outer tooth cylinder (20), and the rectangular teeth A (2102) and the rectangular teeth B (2001) have the same number.