Hydraulic occlusion tool

Abstract

The utility model discloses a hydraulic occlusion tool which comprises an occlusion mechanism assembly and a lower bearing assembly installed in the occlusion mechanism assembly in a sleeved mode, the end, away from the occlusion mechanism assembly, of the lower bearing assembly is sleeved with a far-away valve assembly, and the end, away from the lower bearing assembly, of the valve assembly is sleeved with an upper bearing assembly. A valve outer pipe and a valve inner assembly are arranged in the valve assembly, the valve inner assembly is in butt joint with the lower bearing assembly, and the outer side of the valve inner assembly is sleeved with the valve outer pipe. According to the hydraulic occlusion tool, when a drilling tool combination of a screw tool and the hydraulic occlusion tool is used for directional drilling, the good deflecting capacity and the high drilling speed can be obtained, sealing and oil injection treatment are conducted in the hydraulic occlusion tool, the mode conversion of the tool is more sensitive, the mode conversion efficiency is improved, and the drilling efficiency is improved. Therefore, the construction time is reduced to a certain extent, and the construction cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling tools, in particular to a hydraulic biting tool. Background Art

[0002] Petroleum is a natural mixture of hydrocarbons that can be refined into gasoline and diesel. Petroleum is often stored underground and needs to be extracted from the ground using tools. Hydraulic biting tools are used in the process of oil extraction.

[0003] The directional deflection tools currently used on the market are mainly screw tools and rotary steerable tools. Screw tools have a fast drilling speed and a high average drilling base, and are mainly used in wells with small well deviations. Due to the characteristics of the tools, they do not have sufficient deflection capacity and cannot be used in extended reach wells and horizontal wells.

[0004] For extended reach wells and horizontal wells, we usually use rotary steerable tools. Rotary steerable tools have strong deflection capabilities, but the cost of using rotary steerable tools is very high. In addition, since the working principle of rotary steerable tools is often pointing or pushing, the drilling rate is slow during the drilling process, increasing construction time and cost.

[0005] In response to the above problems, it is urgent to carry out innovative design based on the original tool structure. Utility Model Content

[0006] The purpose of the present utility model is to provide a hydraulic engagement tool to solve the problem raised in the above background technology that for large displacement wells and horizontal wells, we usually use rotary steering tools. Rotary steering tools have strong deflection ability, but the cost of using rotary steering tools is very high. In addition, since the working principle of rotary steering tools is often pointing or pushing, the drilling base is slow during the drilling process, which increases construction time and cost.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic engaging tool, comprising an engaging mechanism assembly and a lower bearing assembly sleeved and mounted inside the engaging mechanism assembly;

[0008] The end of the lower bearing assembly away from the engaging mechanism assembly is sleeved with the valve assembly, and the end of the valve assembly away from the lower bearing assembly is sleeved with the upper bearing assembly;

[0009] The valve assembly is provided with a valve outer tube and a valve inner assembly inside, the valve inner assembly is docked with the lower bearing assembly, and the valve outer tube is sleeved on the outer side of the valve inner assembly.

[0010] Preferably, a waist slot hole is provided on the outer side of the internal component of the valve, and the waist slot hole is arranged corresponding to the outer tube of the valve.

[0011] Preferably, the interior of the engaging mechanism assembly is provided with an engaging outer tube, a rotating connecting shaft and a rotating driving rod, the engaging outer tube is sleeved on the outside of the upper bearing assembly, and the rotating connecting shaft is rotatably installed inside the engaging outer tube.

[0012] Preferably, a rotation drive rod is sleeved inside the rotation connecting shaft, and one end of the rotation connecting shaft away from the rotation drive rod is located outside the occlusal outer tube.

[0013] Preferably, a balancing piston and a connecting shaft nut are provided inside the engaging mechanism assembly, the balancing piston is sleeved on the outside of the rotating drive rod, and the connecting shaft nut is threadedly installed on the end of the rotating connecting shaft.

[0014] Preferably, a drive rod nut and a compression spring are provided inside the engaging mechanism assembly, and the drive rod nut is threadedly mounted on the outside of the rotating drive rod, and the compression spring is sleeved on the outside of the rotating drive rod.

[0015] Preferably, the valve assembly and the upper bearing assembly are located inside the bite outer tube, and the valve assembly is located between the bite outer tube and the valve outer tube.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. When using a drill string combination of a screw tool and a hydraulic engagement tool for directional drilling, better deflection capability and faster drilling speed can be achieved;

[0018] 2. The hydraulic bite tool is sealed and oiled internally, making the tool more sensitive in mode switching and improving the efficiency of mode switching, thereby reducing construction time and saving construction costs to a certain extent;

[0019] 3. Furthermore, in order to combine the advantages of the rotary guide tool's strong deflection capability and the screw tool's fast drilling speed, when using the screw tool for deflection, it is possible to have better deflection capability while retaining the screw's own fast drilling speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view structural diagram of the bite mechanism assembly of the utility model;

[0021] Figure 2 This is a schematic diagram of the front view structure of the occlusal outer tube of the utility model;

[0022] Figure 3 This is a schematic diagram of the front view of the internal components of the valve of the utility model;

[0023] Figure 4 This is a schematic diagram of the front view structure of the balancing piston of the utility model;

[0024] Figure 5 For this utility model Figure 3 Schematic diagram of the cross-sectional structure at point A in FIG;

[0025] Figure 6 This is a schematic diagram of the front view structure of the outer tube of the valve of this utility model.

[0026] In the figure: 1. Engaging mechanism assembly; 2. Lower bearing assembly; 3. Valve assembly; 4. Upper bearing assembly; 5. Valve outer tube; 6. Valve internal assembly; 7. Engaging outer tube; 8. Rotating connecting shaft; 9. Rotating drive rod; 10. Balancing piston; 11. Connecting shaft nut; 12. Drive rod nut; 13. Compression spring; 14. Waist groove hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In a specific embodiment, Figures 1-6 As shown, the basic internal composition of the tool is disclosed;

[0029] An engaging mechanism assembly 1 and a lower bearing assembly 2 sleeved and mounted inside the engaging mechanism assembly 1;

[0030] The end of the lower bearing assembly 2 away from the engaging mechanism assembly 1 is sleeved with the valve assembly 3, and the end of the valve assembly 3 away from the lower bearing assembly 2 is sleeved with the upper bearing assembly 4;

[0031] The valve assembly 3 is provided with a valve outer tube 5 and a valve inner assembly 6, and the valve inner assembly 6 is docked with the lower bearing assembly 2, and the valve outer tube 5 is sleeved on the outer side of the valve inner assembly 6;

[0032] A waist slot hole 14 is provided on the outside of the valve internal component 6, and the waist slot hole 14 is provided correspondingly to the valve outer tube 5;

[0033] The interior of the bite mechanism assembly 1 is provided with a bite outer tube 7, a rotation connecting shaft 8 and a rotation driving rod 9. The bite outer tube 7 is sleeved on the outer side of the upper bearing assembly 4, and the rotation connecting shaft 8 is rotatably installed inside the bite outer tube 7;

[0034] A rotation drive rod 9 is sleeved inside the rotation connecting shaft 8 , and one end of the rotation connecting shaft 8 away from the rotation drive rod 9 is located outside the occlusal outer tube 7 .

[0035] The hydraulic biting tool consists of four major parts: an upper bearing assembly 4, a valve assembly 3, a lower bearing assembly 2, and a biting mechanism assembly 1. The valve assembly 3 is composed of a valve outer tube 5 and a valve internal assembly 6. The biting mechanism assembly 1 is composed of a biting outer tube 7, a rotating connecting shaft 8, a rotating drive rod 9, a balancing piston 10, a connecting shaft nut 11, a drive rod nut 12 and a compression spring 13. An electromagnetic valve is provided in the valve internal assembly 6. By controlling the current on and off of the electromagnetic valve, the valve is opened and closed, completing the basic structural relationship of the internal structure of the tool.

[0036] In one specific embodiment, Figures 1-6 As shown, the adaptation process between the internal structures of the tool is disclosed;

[0037] The engaging mechanism assembly 1 is internally provided with a balancing piston 10 and a connecting shaft nut 11. The balancing piston 10 is sleeved on the outer side of the rotating drive rod 9, and the connecting shaft nut 11 is threadedly installed on the end of the rotating connecting shaft 8.

[0038] A drive rod nut 12 and a compression spring 13 are provided inside the engaging mechanism assembly 1, and the drive rod nut 12 is threadedly mounted on the outside of the rotating drive rod 9, and the compression spring 13 is sleeved on the outside of the rotating drive rod 9;

[0039] The valve assembly 3 and the upper bearing assembly 4 are located inside the bite outer tube 7 , and the valve assembly 3 is located between the bite outer tube 7 and the valve outer tube 5 .

[0040] The valve outer tube 5 is the main body, and the valve internal component 6 is placed inside the valve outer tube 5 through the hole-shaft clearance fit, and is connected to the lower bearing component 2 and the upper bearing component 4 through threads. There are four waist slot holes 14 on the valve internal component 6, and the solenoid valve can be used to control the opening and closing of the four waist slot holes 14. The bite mechanism component 1 is based on the bite outer tube 7 inside the bite mechanism component 1. The rotating drive rod 9 inside the bite mechanism component 1 is placed in the bite outer tube 7 inside the bite mechanism component 1 through the spline hole-shaft clearance fit, and the balance piston 1 inside the bite mechanism component 1 0 is tightly fitted on the rotating drive rod 9 inside the bite mechanism assembly 1 through a transition fit. The compression spring 13 inside the bite mechanism assembly 1 is placed on the rotating drive rod 9 through a hole-shaft clearance fit. The drive rod nut 12 is connected to the bottom of the rotating drive rod 9 through a thread. The rotating connecting shaft 8 passes through the rotating drive rod 9 through a hole-shaft clearance fit. The connecting shaft nut 11 is connected to the end of the rotating connecting shaft 8 through a thread. The rotating drive rod 9 and the balancing piston 10 are filled with high-temperature resistant hydraulic oil, making the tool more sensitive to mode conversion through the switch valve, thereby improving the efficiency of mode conversion.

[0041] In one of the specific embodiments, the basic working process of the tool is disclosed;

[0042] During use, the hydraulic engagement tool controls the mode conversion by switching the solenoid valve, specifically the cycle mode of "opening the solenoid valve - disengaging the engagement structure - closing the solenoid valve - disengaging the engagement mechanism component 1". When a certain mode is needed, the mode conversion is performed by switching the solenoid valve, and the relevant instructions are sent through the MWD measurement while drilling equipment to determine the current tool mode. In the disengagement mode of the engagement mechanism component 1, the solenoid valve is opened, and after the mud flows out of the waist groove hole 14, the rotating drive rod 9 is pushed to disengage. At this time, the tool can be combined with other tools for rotary drilling. In the engagement mode of component 1, the solenoid valve is closed, and the engagement structure engages and rotates the connecting shaft 8 under the action of the compression spring 13. At this time, the tool can be matched with other tools for sliding drilling and directional inclination. After the mode is determined, the drilling speed of the tool is slowed down in the early stage to determine the direction and inclination ability, and then the drilling speed is accelerated. The hydraulic engagement tool uses the solenoid valve to control the disengagement and engagement of the engagement mechanism component 1, so as to realize the directional inclination function in combination with other tools. When the hydraulic engagement tool and other tools are combined for directional drilling, better inclination ability and faster drilling speed can be obtained, which increases the overall practicality.

[0043] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic engagement tool comprising an engagement mechanism assembly (1) and a lower bearing assembly (2) sleeved and mounted inside the engagement mechanism assembly (1); Its characteristics are: The invention also includes: the end of the lower bearing assembly (2) away from the engaging mechanism assembly (1) is sleeved with a valve assembly (3), and the end of the valve assembly (3) away from the lower bearing assembly (2) is sleeved with an upper bearing assembly (4); The valve assembly (3) is provided with a valve outer tube (5) and a valve inner assembly (6), the valve inner assembly (6) is docked with the lower bearing assembly (2), and the valve outer tube (5) is sleeved on the outer side of the valve inner assembly (6).

2. A hydraulic biting tool according to claim 1, characterized in that: A waist groove hole (14) is provided on the outer side of the valve internal component (6), and the waist groove hole (14) is arranged corresponding to the valve outer tube (5).

3. The hydraulic engagement tool according to claim 1, characterized in that: The interior of the engaging mechanism assembly (1) is provided with an engaging outer tube (7), a rotating connecting shaft (8) and a rotating driving rod (9); the engaging outer tube (7) is sleeved on the outside of the upper bearing assembly (4), and the rotating connecting shaft (8) is rotatably installed inside the engaging outer tube (7).

4. A hydraulic biting tool according to claim 3, characterized in that: A rotation drive rod (9) is sleeved inside the rotation connection shaft (8), and one end of the rotation connection shaft (8) away from the rotation drive rod (9) is located outside the occlusal outer tube (7).

5. The hydraulic engagement tool according to claim 1, characterized in that: A balancing piston (10) and a connecting shaft nut (11) are provided inside the engaging mechanism assembly (1). The balancing piston (10) is sleeved on the outside of the rotating drive rod (9), and the connecting shaft nut (11) is threadedly mounted on the end of the rotating connecting shaft (8).

6. The hydraulic engaging tool according to claim 1, characterized in that: A drive rod nut (12) and a compression spring (13) are provided inside the engaging mechanism assembly (1), and the drive rod nut (12) is threadedly mounted on the outside of the rotating drive rod (9), and the compression spring (13) is sleeved on the outside of the rotating drive rod (9).

7. The hydraulic engaging tool according to claim 1, characterized in that: The valve assembly (3) and the upper bearing assembly (4) are located inside the occlusal outer tube (7), and the valve assembly (3) is located between the occlusal outer tube (7) and the valve outer tube (5).

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