Hydrodynamic tool

Abstract

The utility model discloses a water power tool which is arranged in an oil pipe, and an annular structure is formed between the water power tool and the oil pipe. The outer diameter of the water power tool is of a variable outer diameter structure, and the water power tool extrudes liquid in the annular structure in the outer diameter changing state so as to change the thrust on an instrument string in the horizontal well. According to the utility model, the instrument string is pushed to reach a target well section through variable thrust generated during liquid injection of the hydrodynamic tool with the variable outer diameter, so that the problem that the instrument cannot reach the target operation well section by virtue of self gravity during horizontal well operation is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of well logging conveying instruments, in particular to a water power tool. Background Art

[0002] Hydrodynamic tools, also known as hydrodynamic auxiliary tools, are used as conveying tools for horizontal well operations during pumping or injection logging operations. In horizontal well operations, when there is a large inclination, horizontal section, or the instrument is stuck, the instrument cannot reach the target well section by its own gravity. At this time, the instrument needs to use an auxiliary tool to reach the target well section, and the hydrodynamic tool can play this auxiliary role. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a hydraulic tool that generates variable thrust when injecting liquid through a hydraulic tool with a variable outer diameter to push the instrument string to the target well section, thereby solving the problem that the instrument cannot reach the target operating well section by its own gravity.

[0004] Technical solution: To achieve the above purpose, the utility model provides a water power tool, which is arranged in an oil pipe, and an annular structure is formed between the water power tool and the oil pipe;

[0005] The outer diameter of the hydrodynamic tool is a variable outer diameter structure. The hydrodynamic tool squeezes the liquid in the annular structure when the outer diameter changes, so as to change the thrust on the instrument string in the horizontal well.

[0006] Furthermore, the water power tool includes an inner diameter-changing portion and an outer flexible portion, the inner diameter-changing portion is axially movably arranged in the outer flexible portion; the outer diameter of the rear end portion of the inner diameter-changing portion is a structure that gradually increases from front to rear, and the inner diameter of the outer flexible portion is a structure that gradually increases from front to rear; when the inner diameter-changing portion moves axially relative to the outer flexible portion, the outer flexible portion is squeezed in an internal supporting manner, and the outer flexible portion is deformed to change the outer diameter size.

[0007] Furthermore, the water power tool further comprises a front fixing block, which is fixedly arranged relative to the front end of the outer flexible portion, and the front end of the inner diameter reducing portion extends into the inner cavity of the front fixing block.

[0008] Furthermore, the water power tool further comprises a rear fixing block, the rear fixing block is fixedly arranged relative to the rear end of the outer flexible portion, and the rear end of the inner diameter reducing portion is slidably interlaced with the rear fixing block.

[0009] Furthermore, the inner diameter-changing portion is a diameter-changing rod.

[0010] Furthermore, the outer flexible portion is a rubber barrel.

[0011] Beneficial effects: The utility model changes the outer diameter of the water power tool by driving a power source, and then injects relevant liquid through the ground to provide a variable thrust to the water power tool, and then pushes the tool and the instrument to the target well section to complete the logging operation, solving the problem that the instrument cannot reach the target operation well section by its own gravity when there is a large inclination, horizontal section or the instrument is stuck in the horizontal well operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a structural schematic diagram of a water power tool;

[0013] Attached Figure 2 It is a structural schematic diagram of an embodiment of a water power tool before the diameter reducing rod is moved;

[0014] Attached Figure 3 The schematic diagram is a structural diagram of an embodiment of a water power tool after the reducer rod is moved. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings.

[0016] As attached Figure 1 As shown, a hydrodynamic tool is arranged in an oil pipe 5, and an annulus structure 6 is formed between the hydrodynamic tool and the oil pipe 5; the outer diameter of the hydrodynamic tool is a variable outer diameter structure, and the hydrodynamic tool squeezes the liquid in the annulus structure 6 when the outer diameter changes, so as to change the thrust on the instrument string in the horizontal well. The utility model generates a variable thrust when the hydrodynamic tool with a variable outer diameter is injected with liquid to push the instrument string to the target well section, thereby solving the problem that the instrument cannot reach the target operating well section by its own gravity when the well is at a large inclination, horizontal section or the instrument is stuck in the horizontal well operation. The working principle is roughly as follows: the outer diameter of the hydrodynamic tool is changed by driving a power source, and then the relevant liquid is injected through the ground to provide a variable thrust to the hydrodynamic tool, and then the tool and the instrument are pushed to the target well section to complete the logging operation.

[0017] The water power tool comprises an inner diameter reducing part 3 and an outer flexible part 2, wherein the inner diameter reducing part 3 is axially movable and arranged in the outer flexible part 2; the outer diameter of the rear end part of the inner diameter reducing part 3 is a structure that gradually increases from front to back, and the inner diameter of the outer flexible part 2 is a structure that gradually increases from front to back; when the inner diameter reducing part 3 moves axially relative to the outer flexible part 2, it squeezes the outer flexible part 2 in an inner supporting manner, and the outer flexible part 2 is deformed and changes the outer diameter size. The water power tool also comprises a front fixing block 1, which is fixedly arranged relative to the front end of the outer flexible part 2, and the front end of the inner diameter reducing part 3 extends into the inner cavity of the front fixing block 1. The water power tool also comprises a rear fixing block 4, which is fixedly arranged relative to the rear end of the outer flexible part 2, and the rear end of the inner diameter reducing part 3 is slidably interlaced with the rear fixing block 4. Preferably, the inner diameter reducing part 3 is a diameter reducing rod, and the outer flexible part 2 is a rubber barrel.

[0018] As attached Figure 2 and attached Figure 3 As shown, during operation, the front fixing block 1, the rear fixing block 4 and the rubber barrel are fixed together and are in a relatively static state, and the reducer rod is in relative motion with them. Since the front and rear diameters of the reducer rod are not consistent, the rubber barrel is squeezed from the inside by the movement of the reducer rod, so that the outer diameter of the rubber barrel becomes larger, and the cross-sectional area becomes larger accordingly. After the cross-section becomes larger, the axial force of the instrument string in the oil pipe 5 becomes larger, thereby pushing the instrument string to move to the target position. The movement of the reducer rod is controlled. The reducer rod can be moved to different positions as needed, so that the rubber barrel can have different outer diameters and form different cross-sectional areas, thereby providing thrusts of different sizes to push the instrument string to move.

[0019] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A hydrodynamic tool, the hydrodynamic tool being arranged in an oil pipe (5), and an annular structure (6) being formed between the hydrodynamic tool and the oil pipe (5); Features: The outer diameter of the hydrodynamic tool is a variable outer diameter structure. When the outer diameter of the hydrodynamic tool changes, the hydrodynamic tool squeezes the liquid in the annular structure (6) to change the thrust of the instrument string in the horizontal well.

2. A water power tool according to claim 1, characterized in that: The water power tool comprises an inner diameter-changing portion (3) and an outer flexible portion (2); the inner diameter-changing portion (3) is axially movable and arranged inside the outer flexible portion (2); the outer diameter of the rear end portion of the inner diameter-changing portion (3) is a structure that gradually increases from front to back, and the inner diameter of the outer flexible portion (2) is a structure that gradually increases from front to back; when the inner diameter-changing portion (3) moves axially relative to the outer flexible portion (2), it squeezes the outer flexible portion (2) in an internal supporting manner, and the outer flexible portion (2) is deformed to change the outer diameter size.

3. A water power tool according to claim 2, characterized in that: The water power tool further comprises a front fixing block (1), wherein the front fixing block (1) is fixedly arranged relative to the front end of the outer flexible portion (2), and the front end of the inner diameter reducing portion (3) extends into the inner cavity of the front fixing block (1).

4. A water power tool according to claim 2, characterized in that: The water power tool further comprises a rear fixing block (4), wherein the rear fixing block (4) is fixedly arranged relative to the rear end of the outer flexible portion (2), and the rear end of the inner diameter reducing portion (3) is slidably interlaced with the rear fixing block (4).

5. A water power tool according to claim 2, characterized in that: The inner diameter reducing portion (3) is a diameter reducing rod.

6. A water power tool according to claim 2, characterized in that: The outer flexible part (2) is a rubber barrel.

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