Valve device for rotary steering tool

Abstract

The utility model provides a valve device for a rotary steering tool. The valve device comprises an outer pipe and a valve cavity pipe, the valve cavity pipe is arranged in the outer pipe, a valve piston rod and a valve switching piston rod are sequentially arranged in the valve cavity pipe in the axial direction of the valve cavity pipe, a spring is arranged on the outer wall of the valve switching piston rod, and a valve indexing supporting sleeve and a bypass valve upper sleeve are sequentially arranged on the inner wall of the valve cavity pipe in the axial direction of the valve cavity pipe. The valve piston rod is connected with the valve switching piston rod, an oil injection space used for containing hydraulic oil is formed between the outer wall of the valve piston rod and the inner wall of the valve cavity pipe, and the valve indexing supporting sleeve, the guide groove and the valve balance piston are all arranged in the oil injection space, so that the tool is more sensitive to switch between a guide mode and a vertical well mode through a switch pump. And the pump switching frequency and waiting time required by mode conversion of the tool are shortened, namely, the mode conversion time of the tool is shortened, the mode conversion efficiency is improved, the performance of the rotary steering tool is improved, the construction time is shortened, and the construction cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of rotary steering tools for oil drilling, in particular to a valve device used for the rotary steering tools. Background Art

[0002] Figure 1 FIG. 2 shows a connection structure of a valve device of a rotary guide tool in the prior art. Figure 1 As shown, the outer tube 1 is the main body, the valve cavity tube 2 and the outer tube 1 are placed in the outer tube 1 through the hole-axis clearance, the bypass valve upper sleeve 9 and the valve cavity tube 2 are placed in the valve cavity tube through the hole-axis clearance, and are fixed by the bypass valve positioning pin 10, so that the mud hole 1 and the mud hole 2 are aligned. The throttling nozzle 4 and the bypass valve piston 3 are placed in the bypass valve piston through the hole-axis clearance and fixed by the clamping ring 5, the bypass valve piston 3 and the valve cavity tube 2 are placed in the valve cavity tube through the hole-axis clearance, and the guide pin 6 is fixed in the guide groove, so that the bypass valve piston can move along the guide groove under the action of the guide pin. The 9.5mm diameter spring 8 and the bypass valve piston 3 are placed on the bypass valve piston through the hole-axis clearance, and thrust bearings 7 are installed at both ends.

[0003] The current valve device requires a long time to debug the tool during the drilling mode conversion process. The 9.5mm diameter spring has a weak rebound force after compression, which requires the pump to be stopped for a long time before the valve device can be reset, which prolongs the construction period and increases the construction cost. During the use of the current valve device, it was found that the conversion is not sensitive, the downhole reversal time is long, and the pump needs to be turned on and off multiple times to adjust the rotary steering tool to the corresponding mode. Utility Model Content

[0004] The utility model provides a valve device for a rotary guide tool to solve at least one of the above technical problems.

[0005] To solve the above problems, as one aspect of the utility model, a valve device for a rotary guide tool is provided, comprising: an outer tube and a valve cavity tube;

[0006] The valve cavity tube is arranged in the outer tube, and a valve piston rod and a valve conversion piston rod are arranged in sequence in the valve cavity tube along the axial direction of the valve cavity tube, a spring is arranged on the outer wall of the valve conversion piston rod, and a valve indexing support sleeve and a bypass valve upper sleeve are arranged in sequence on the inner wall of the valve cavity tube along the axial direction of the valve cavity tube; the valve piston rod is connected to the valve conversion piston rod;

[0007] The valve indexing support sleeve is provided with a guide pin, the lower end of which is arranged in a guide groove on the outer wall of the valve piston rod, and a valve balancing piston is arranged on the outer side of the valve piston rod, and the valve balancing piston is located on the side of the valve indexing support sleeve facing the valve conversion piston rod;

[0008] An oil filling space for accommodating hydraulic oil is formed between the outer wall of the valve piston rod and the inner wall of the valve cavity tube, and the valve indexing support sleeve, the guide groove, and the valve balancing piston are all arranged in the oil filling space.

[0009] Preferably, the inlet end of the valve piston rod is provided with a throttling nozzle via a clamping ring.

[0010] Preferably, a valve support sleeve upper seat is installed on the inner wall of the valve cavity tube through an upper seat positioning pin, and the valve support sleeve upper seat is located on the side of the valve indexing support sleeve away from the valve conversion piston rod, and the valve support sleeve upper seat is in contact with the valve indexing support sleeve through a thin-walled bearing.

[0011] Preferably, a valve support sleeve base is installed on the inner wall of the valve cavity tube through a base positioning pin, and the valve support sleeve base is in contact with the valve support sleeve base through a thrust bearing between the valve support sleeve base and the valve balancing piston.

[0012] Preferably, the bypass valve upper sleeve is installed on the inner wall of the valve cavity tube through a bypass valve positioning pin.

[0013] Preferably, a valve oil chamber sealing plug is provided inside the valve support sleeve base, and the valve oil chamber sealing plug is located on a side of the base positioning pin away from the valve chamber tube.

[0014] Preferably, the wire diameter of the spring is 10 mm.

[0015] Due to the adoption of the above technical scheme, the utility model forms an oil injection space and a corresponding sealing structure inside, and hydraulic oil is added to the oil injection space, so that the tool is more sensitive to switch the guiding mode and the vertical well mode through the switching pump, and the number of switching pumps and waiting time required for the tool to perform mode switching are shortened, that is, the time for the tool to perform mode switching is shortened, the efficiency of mode switching is improved, and the performance of the rotary steering tool is improved, thereby reducing the construction time to a certain extent and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure schematically shows a connection structure diagram of a valve device of a rotary guide tool in the prior art;

[0017] Figure 2 The structural diagram of the utility model is schematically shown;

[0018] Figure 3 The schematic diagram of the local structure of the utility model when it is in the pump-on guide mode is shown schematically;

[0019] Figure 4The local structure diagram of the utility model when in the pump-on vertical well mode is schematically shown;

[0020] Figure 5 A schematic diagram of a guide groove is shown schematically.

[0021] The reference numerals in the figure are: outer tube 1; valve cavity tube 2; valve piston rod 3; throttling nozzle 4; retaining ring 5; upper seat positioning pin 6; guide pin 7; base positioning pin 8; valve support sleeve upper seat 9; thin-walled bearing 10; valve indexing support sleeve 11; thrust bearing 12; valve support sleeve base 13; valve balancing piston 14; valve conversion piston rod 15; spring 16; bypass valve upper sleeve 17; bypass valve positioning pin 18; valve oil chamber sealing plug 19; guide groove 20; oil injection space 21; first mud hole 22; second mud hole 23; third mud hole 24. DETAILED DESCRIPTION

[0022] The following is a detailed description of the embodiments of the present invention, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0023] The utility model is a key device for controlling directional drilling of the tool and disengagement and engagement of the clutch inside the tool in a rotary steering tool. As one aspect of the utility model, a valve device for a rotary steering tool is provided, comprising: an outer tube 1 and a valve cavity tube 2; the valve cavity tube 2 is arranged in the outer tube 1, and a valve piston rod 3 and a valve conversion piston rod 15 are arranged in sequence in the valve cavity tube 2 along the axial direction of the valve cavity tube 2, a spring 16 is arranged on the outer wall of the valve conversion piston rod 15, and a valve indexing support sleeve 11 and a bypass valve upper sleeve 17 are arranged in sequence on the inner wall of the valve cavity tube 2 along the axial direction of the valve cavity tube 2; the valve piston rod 3 is connected to the valve conversion piston rod 15; the valve indexing support sleeve 11 and the bypass valve upper sleeve 17 are arranged in sequence on the inner wall of the valve cavity tube 2 along the axial direction of the valve cavity tube 2; the valve piston rod 3 is connected to the valve conversion piston rod 15; the valve indexing support sleeve 11 and the bypass valve upper sleeve 17 are arranged on the inner wall ... indexing support sleeve A guide pin 7 is arranged on the indexing support sleeve 11, and the lower end of the guide pin 7 is arranged in the guide groove 20 on the outer wall of the valve piston rod 3. A valve balancing piston 14 is arranged on the outer side of the valve piston rod 3, and the valve balancing piston 14 is located on the side of the valve indexing support sleeve 11 facing the valve conversion piston rod 15; an oil filling space 21 for accommodating hydraulic oil is formed between the outer wall of the valve piston rod 3 and the inner wall of the valve cavity tube 2, and the valve indexing support sleeve 11, the guide groove 20, and the valve balancing piston 14 are all arranged in the oil filling space 21. Preferably, a throttling nozzle 4 is arranged at the inlet end of the valve piston rod 3 through a clamping ring 5.

[0024] In this way, the utility model fills the valve piston rod 3 and the valve balance piston 14 with high temperature resistant hydraulic oil, and seals them with valve oil chamber sealing plugs, etc. The new hydraulic valve device can switch tool modes more sensitively and improve the efficiency of tool switching.

[0025] Due to the adoption of the above-mentioned technical scheme, the utility model forms an oil filling space 21 and a corresponding sealing structure inside. Hydraulic oil is filled in the oil filling space 21, so that the tool is more sensitive to switch the guiding mode and the vertical well mode through the switching pump, and the number of switching pumps and waiting time required for the tool to perform mode switching are shortened, that is, the time for the tool to perform mode switching is shortened, the efficiency of mode switching is improved, and the performance of the rotary steering tool is improved, thereby reducing the construction time to a certain extent and saving construction costs.

[0026] Preferably, a valve support sleeve upper seat 9 is installed on the inner wall of the valve cavity tube 2 through an upper seat positioning pin 6, and the valve support sleeve upper seat 9 is located on the side of the valve indexing support sleeve 11 away from the valve conversion piston rod 15, and the valve support sleeve upper seat 9 is in contact with the valve indexing support sleeve 11 through a thin-walled bearing 10.

[0027] Preferably, a valve support sleeve base 13 is installed on the inner wall of the valve cavity tube 2 through a base positioning pin 8, and the valve support sleeve base 13 is in contact with the valve balance piston 14 through a thrust bearing 12.

[0028] Preferably, the bypass valve upper sleeve 17 is installed on the inner wall of the valve cavity tube 2 through the bypass valve positioning pin 18 .

[0029] Preferably, a valve oil chamber sealing plug 19 is provided inside the valve support sleeve base 13 , and the valve oil chamber sealing plug 19 is located on a side of the base positioning pin 8 away from the valve chamber tube 2 .

[0030] Preferably, the wire diameter of the spring 16 is 10 mm.

[0031] During operation, when the mud pump is turned on, the valve piston rod 3 and the valve conversion piston rod 15 are connected together by threads and perform linear motion under pressure. The valve indexing support sleeve 11 performs rotational motion under the action of the bearings at both ends and the guide pins 7.

[0032] During use, the tool switches modes by switching on and off the mud pump, specifically, the cycle mode of "off pump - on pump vertical well - off pump - on pump guidance - off pump". When the mode is needed, the mud pump is switched on and off to switch the mode, and the current tool mode is determined by the MWD measurement while drilling related software instructions.

[0033] like Figure 3 As shown, in the guide mode, the first mud hole 22, the second mud hole 23, and the third mud hole 24 are aligned and connected, and the mud flows out of the third mud hole 24 into the first mud hole 22 and the second mud hole 23, and flows into the gap between the outer tube 1 and the valve cavity tube 2, the tool enters the guide mode, and the clutch is disengaged.

[0034] like Figure 4 As shown, in the vertical well mode, the first mud hole 22, the second mud hole 23, and the third mud hole 24 are not aligned and connected, the mud flows inside the piston rod, the tool enters the vertical well mode, and the clutch is engaged. A 10mm diameter spring is used, and the spring has a greater rebound force after compression, and rebounds more quickly, shortening the waiting time after shutting down the pump.

[0035] Please refer to Figure 5 The guide groove 20 is composed of grooves of different lengths. When the mud pump is turned off, the guide pin 7 moves along the guide groove 20. When the mud pump is turned on, the guide pin 7 moves along the guide groove 2, and the tool enters the straight well mode. In the straight well mode, the first mud hole 22, the second mud hole 23, and the third mud hole 24 are not aligned and connected, and the mud flows in the piston rod. When the guide pin 7 moves along the guide groove 3, the tool enters the guide mode. In the guide mode, the first mud hole 22, the second mud hole 23, and the third mud hole 24 are aligned and connected. The mud flows from the third mud hole 24 into the first mud hole 22 and the second mud hole 23, and then flows into the gap between the outer tube and the valve cavity tube, pushing the clutch to disengage.

[0036] During operation, after the valve support sleeve upper seat 9 and the valve support sleeve base 13 are fixed by the positioning pins, the valve piston indexing support sleeve 11 can move along the track of the guide groove 20 under the action of the guide pin 7. Since the valve piston rod 3 and the valve balance piston 14 are filled with oil, the movement of the valve piston indexing support sleeve 11 is well lubricated, and the two sides are in contact with the thin-walled bearing 10 and the thrust bearing 12 respectively, so that the valve piston indexing support sleeve 11 can move very smoothly along the guide groove 20, improving the sensitivity of the tool mode conversion and improving the efficiency of the tool. For the rotary guide tool as a whole, the overall performance of the tool is improved, the debugging time required for mode conversion using the rotary guide tool is shortened, the construction period is reduced to a certain extent, and the construction cost is saved.

[0037] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A valve device for a rotary guide tool, characterized in that include: An outer tube (1) and a valve cavity tube (2); The valve cavity tube (2) is arranged in the outer tube (1), and a valve piston rod (3) and a valve conversion piston rod (15) are arranged in sequence in the valve cavity tube (2) along the axial direction of the valve cavity tube (2); a spring (16) is arranged on the outer wall of the valve conversion piston rod (15), and a valve indexing support sleeve (11) and a bypass valve upper sleeve (17) are arranged in sequence on the inner wall of the valve cavity tube (2) along the axial direction of the valve cavity tube (2); the valve piston rod (3) is connected to the valve conversion piston rod (15); A guide pin (7) is arranged on the valve indexing support sleeve (11), and the lower end of the guide pin (7) is arranged in a guide groove (20) on the outer wall of the valve piston rod (3). A valve balancing piston (14) is arranged on the outer side of the valve piston rod (3), and the valve balancing piston (14) is located on the side of the valve indexing support sleeve (11) facing the valve conversion piston rod (15); An oil injection space (21) for accommodating hydraulic oil is formed between the outer wall of the valve piston rod (3) and the inner wall of the valve cavity tube (2); the valve indexing support sleeve (11), the guide groove (20), and the valve balancing piston (14) are all arranged in the oil injection space (21).

2. The valve device for a rotary guide tool according to claim 1, characterized in that The inlet end of the valve piston rod (3) is provided with a throttling nozzle (4) via a clamping ring (5).

3. The valve device for a rotary guide tool according to claim 1, characterized in that The inner wall of the valve cavity tube (2) is mounted with a valve support sleeve upper seat (9) via an upper seat positioning pin (6); the valve support sleeve upper seat (9) is located on the side of the valve indexing support sleeve (11) away from the valve conversion piston rod (15); the valve support sleeve upper seat (9) is in contact with the valve indexing support sleeve (11) via a thin-walled bearing (10).

4. The valve device for a rotary guide tool according to claim 3, characterized in that A valve support sleeve base (13) is installed on the inner wall of the valve cavity tube (2) via a base positioning pin (8), and the valve support sleeve base (13) is in contact with the valve support sleeve base (13) via a thrust bearing (12) between the valve support sleeve base (13) and the valve balancing piston (14).

5. The valve device for a rotary guide tool according to claim 1, characterized in that The bypass valve upper sleeve (17) is installed on the inner wall of the valve cavity tube (2) via a bypass valve positioning pin (18).

6. The valve device for a rotary guide tool according to claim 4, characterized in that A valve oil chamber sealing plug (19) is arranged inside the valve support sleeve base (13), and the valve oil chamber sealing plug (19) is located on a side of the base positioning pin (8) away from the valve chamber tube (2).

7. The valve device for a rotary guide tool according to claim 1, characterized in that The wire diameter of the spring (16) is 10 mm.

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