Preset downhole switch valve
A switching valve and preset technology, which is applied in wellbore/well components, wellbore/well valve devices, earthwork drilling and production, etc., can solve the problems of complex structure, high cost, poor versatility, etc., and achieve structural design Reasonable and low-cost effect
Active Publication Date: 2017-07-07
BAOJI JINHUI OILFIELD MACHINERY
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0003] One model of the upper lock cylinder of the existing preset downhole switch valve can only correspond to one type of seat joint, which has poor versatility, complex structure and high cost, which brings many problems to on-site operation
Method used
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Embodiment Construction
[0019] Such as figure 1 As shown, the preset downhole switching valve of the present invention includes an inner fishing neck 1, a positioning claw sleeve 2, a positioning claw 3, a support sleeve 4, a spring 5, a connecting body 6, a body 7, an extension rod 8, a pressing rod 9, Spool 10, spring 11, locking ring 12, balance rod 13, piston cylinder 14, joint body 15, bottom plug 16, upper joint 17, sealing assembly 18, screw 19 and O-ring (20, 21, 22, 23, 24, 25).
[0020] The inner fishing neck 1 is a cylindrical structure, and an installation through hole is arranged in the axial direction.
[0021] The positioning claw 3 is a tubular structure, one end of which is assembled and connected to the inner salvage neck 1 through the positioning claw sleeve 2, the other end is equipped with a first spring 5 inside and a plurality of elastic claws separated from each other are evenly arranged on the outer wall along the circumferential direction 3. Wherein, one end of the positio...
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The invention relates to a preset downhole switching valve, which comprises an inner fishing neck, a positioning claw sleeve, a positioning claw, a connecting body, a body, a joint body, a piston cylinder, an upper joint, a balance rod and a connecting rod; the positioning claw is elastic The claw body, the positioning claw sleeve is matched and sleeved inside the positioning claw, one end is assembled and connected with the inner salvage neck and fixed by the set screw with the flat end of the hexagon socket, and the other end is assembled and connected with the connecting body and fixed by the set screw with the flat end of the hexagon socket. The outer wall of the middle section of the body is covered with a sealing assembly; one end of the body is connected to the connecting body and fixed by a hexagon socket flat end set screw, and the other end is connected to the joint body; one end of the joint body is sleeved inside the other end of the body, and the other end is connected to the upper joint Assembled and connected and fixed by hexagon socket flat-end set screws; the piston cylinder is connected with the body internally, and a balance bar is installed inside, and a pressure rod, valve core and spring are installed inside the connection between the balance bar and the connecting rod. The structure design of the invention is simple, The utility model has the advantages of reasonableness, low cost and convenient use, and can efficiently use steel wire to open / close the preset downhole switching valve.
Description
technical field [0001] The invention relates to a switch valve, in particular to a preset downhole switch valve. Background technique [0002] The preset downhole switch valve is one of the downhole tools commonly used in oil and gas development well strings. Its function is to make the upper and lower fluids of the string communicate, and the fluid can flow out of the wellhead. Its switch type: use a wire tool to open / close the preset downhole switch valve, and the design principle is wire operation. [0003] One model of the existing preset type upper lock cylinder of downhole switch valve can only correspond to one type of seat joint, which has poor versatility, complex structure and high cost, which brings many problems to on-site operation. Contents of the invention [0004] In view of the above problems, the present invention provides a reasonable and compact structural design, which is very simple to use, and can be used in seated joints manufactured by domestic an...
Claims
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IPC IPC(8): E21B34/14
Inventor 李旭东杨万里
Owner BAOJI JINHUI OILFIELD MACHINERY