Steel wire rope tripping-in drainage suction device

Abstract

The invention discloses a steel wire rope descending, draining and sucking device. Comprising a wire rope cap; the upper end of the suction valve is detachably connected with the steel wire rope cap; wherein the suction valve comprises: a valve body; an axial pipe cavity is formed in the pipe body, a pair of liquid discharging holes are formed in the upper portion of the pipe body in the radial direction, and a pair of liquid inlet holes are formed in the middle of the pipe body in the radial direction; the one-way valve seat is arranged at the middle upper part of the pipe cavity, a valve hole coaxial with the pipe cavity is formed in the one-way valve seat, and the valve hole is a conical hole of which the hole diameter is gradually reduced from top to bottom; the valve ball is arranged above the one-way valve seat and is matched with the one-way valve seat; the rubber sleeve is arranged on the upper portion of the pipe body in a covering mode, and the periphery of the rubber sleeve is in clearance fit with an oil pipe. The negative-pressure induced spraying device has the beneficial effects that negative-pressure induced spraying can be formed; and at least two groups of anti-top-rushing tools are arranged, so that top-rushing prevention can be realized. The lower portion of the rubber sleeve is connected with the pipe body through a safety pin, and emergency release can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of rock mechanics, and in particular to a wire rope lowering drainage and suction device. Background Art

[0002] After the completion of the gas well, the main methods of early drainage and inducing spraying are: replacing low specific gravity (such as diesel), air lifting by lowering the gas lift valve ring, and coiled tubing gas lifting. Practice has proved that the drainage of many gas wells by replacing diesel with liquid to induce spraying cannot activate the wells to spray. Often, the coiled tubing can be lowered to several hundred meters to activate the wells to spray. This fully shows that the reservoir properties of such wells are relatively good, but the negative pressure created by replacing diesel is not enough, and the use of gas lift valves for gas lifting often easily leads to the loss of wellbore integrity.

[0003] For gas wells with relatively good reservoir properties and relatively sufficient energy, the existing drainage and blowout induction methods have the following shortcomings: ① The negative pressure of diesel injection is not enough; ② The gas lift valve easily becomes the weak point of the gas well string, and gas scouring easily causes leakage of the string, resulting in incomplete wellbore integrity; ③ The continuous tubing gas lift occupies the wellhead for a long time; ④ Mouth-to-mouth gas lift induction blowout easily causes reservoir pollution.

[0004] In order to meet the requirements of drainage and blowout in gas wells with good reservoir properties and sufficient energy, and also to achieve drainage and gas production in the later stage, a drainage and suction valve device with a wire rope that does not occupy the wellhead is designed to achieve wellbore drainage. Summary of the invention

[0005] The object of the present invention is to provide a wire rope lowering drainage and suction device, which is provided with a wire rope cap and a suction valve and can form a negative pressure induced spray.

[0006] To achieve the above object, the present invention adopts the following technical solutions, including:

[0007] A wire rope cap, which is used to connect with the wire rope;

[0008] A suction valve, the upper end of which is detachably connected to the wire rope cap and is used to be lifted up and lowered under the drive of the wire rope cap to realize the suction of the wellbore liquid;

[0009] Wherein, the suction valve comprises:

[0010] A tube body, wherein an axial tube cavity is provided inside, a pair of liquid discharge holes are radially opened at the upper part of the tube body, and a pair of liquid inlet holes are radially opened at the middle part of the tube body;

[0011] A one-way valve seat is arranged in the upper middle part of the tube cavity, and a valve hole coaxial with the tube cavity is provided on the one-way valve seat, and the valve hole is a conical hole with a gradually decreasing aperture from top to bottom;

[0012] A valve ball, which is arranged above the one-way valve seat and matched with the one-way valve seat, and is used to open or close the valve hole of the one-way valve seat, thereby limiting the fluid in the pipe body to flow in one direction from bottom to top;

[0013] The rubber cylinder is covered on the upper part of the tube body. The outer circumference of the rubber cylinder is matched with the oil pipe clearance to generate negative pressure between the rubber cylinder and the oil pipe during the lifting process, so as to introduce liquid into the tube body from the liquid inlet hole and then be discharged through the liquid discharge hole and then pumped out.

[0014] Preferably, it also includes:

[0015] At least two groups of anti-top impact tools are detachably arranged in sequence between the wire rope cap and the suction valve to achieve anti-top impact.

[0016] Preferably, the anti-capping tool comprises:

[0017] An upper joint, the upper end of which is detachably connected to the lower end of the wire rope cap;

[0018] A center tube is detachably connected to the lower end of the upper joint, a first wedge-shaped surface is provided on the upper periphery of the center tube; a stopper extending toward the periphery is provided in the middle of the center tube; and an axially penetrating center hole is provided inside the center tube;

[0019] A slip, the cover of which is arranged on the outer periphery of the first wedge-shaped surface, and a second wedge-shaped surface adapted to the first wedge-shaped surface is arranged on the inner periphery of the slip;

[0020] A spring, the cover of which is arranged in the lower middle part of the central tube, and the upper end of the spring abuts against the lower end of the limit block;

[0021] A sliding sleeve, the sleeve is arranged on the outer periphery of the limit block, and the upper end of the sliding sleeve abuts against the lower end of the slip;

[0022] A spring shield, which is arranged on the outer periphery of the spring, wherein the front part of the spring shield is sealed and connected to the outer periphery of the limit block; and the rear part of the spring shield is sealed and connected to the outer periphery of the lower part of the central tube;

[0023] A lower joint, whose cover is arranged at the lower part of the central tube, the inner periphery of the upper part of the lower joint is matched with the outer periphery of the lower part of the spring shield, and the inner periphery of the lower part of the lower joint is matched with the outer periphery of the central tube; a pressure transmission chamber is formed between the lower joint, the spring shield and the central tube;

[0024] A pressure transmission hole is radially arranged at the lower part of the central tube, and the pressure transmission hole communicates with the central hole and the pressure transmission cavity, and is used for transmitting the pressure in the central tube to the end of the spring shield.

[0025] Preferably, it also includes:

[0026] The weighting rod has an upper end which is detachably connected to the end of the tube body.

[0027] Preferably, the lower portion of the rubber cylinder is connected to the tube body via a safety pin.

[0028] Preferably, an upper sliding sleeve assembly is provided on the outer periphery of the upper portion of the tube body, and the lower end of the upper sliding sleeve assembly abuts against the rubber cylinder.

[0029] Preferably, the wire rope cap, at least two sets of anti-top impact tools, the suction valve and the weighting rod are detachably connected via threads.

[0030] Preferably, the slopes of the first wedge-shaped surfaces of adjacent anti-collision tools are arranged in opposite directions, so as to realize anti-collision in upper and lower directions respectively.

[0031] The beneficial effects of the present invention are: a wire rope cap and a suction valve are provided to form a negative pressure-induced spray; at least two sets of anti-topping tools are provided to achieve anti-topping. The lower part of the rubber tube is connected to the tube body through a safety pin. When the lifting force is too large and it is judged that it is difficult to carry liquid, the safety pin can be lifted up and sheared to achieve emergency release. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a wire rope lowered into a drainage and suction device according to the present invention.

[0033] Figure 2 It is a schematic diagram of the wire rope cap in the present invention.

[0034] Figure 3 It is a half-section schematic diagram of the anti-top impact tool in the present invention.

[0035] Figure 4 It is a half-section schematic diagram of the suction valve in the present invention.

[0036] Figure 5 It is a half-section schematic diagram of the weight rod in the present invention. DETAILED DESCRIPTION

[0037] The invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it according to the description.

[0038] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or other elements or combinations thereof.

[0039] like Figure 1-5 As shown, a wire rope lowering drainage and suction device 1 of the present invention comprises:

[0040] A wire rope cap 110, which is used to connect with the wire rope;

[0041] The suction valve 130, whose upper end is detachably connected to the wire rope cap 110, is used to be lifted up and lowered under the drive of the wire rope cap 110 to realize the extraction of the wellbore liquid; wherein, the suction valve 130 comprises: a tube body 131, an axial tube cavity is provided inside, a pair of drainage holes 132 are radially opened in the upper part of the tube body 131, and a pair of liquid inlet holes 133 are radially opened in the middle part of the tube body 131; a one-way valve seat 134, which is arranged in the upper middle part of the tube cavity, and the one-way valve seat 134 is provided with a valve hole coaxial with the tube cavity, and the valve hole It is a conical hole with a gradually decreasing aperture from top to bottom; the valve ball 135, which is arranged above the one-way valve seat 134 and is adapted to the one-way valve seat 134, and is used to open or close the valve hole of the one-way valve seat 134, thereby limiting the one-way flow of the fluid in the tube body 131 from bottom to top; the rubber cylinder 136, which is covered on the upper part of the tube body, and the outer periphery of the rubber cylinder 136 is matched with the oil pipe clearance, and is used to generate negative pressure between the rubber cylinder 136 and the oil pipe during the lifting process, so as to introduce the liquid into the tube body 131 from the liquid inlet hole 133, and then be discharged through the liquid discharge hole 132 and then pumped out.

[0042] During use, the steel wire rope is first lowered into the drainage and suction device 1 and into the oil pipe, and then the steel wire rope is continuously lifted up and lowered into the drainage and suction device 1. During the lowering process, the valve ball 135 is separated from the one-way valve seat 134, the lumen of the tube body 131 is opened, and the liquid is introduced into the tube body 131 through the liquid inlet hole 133 and then discharged through the drainage hole 132. During the lifting process, the valve ball 135 fits with the one-way valve seat 134, the lumen of the tube body 131 is closed, and the rubber cylinder 136 draws out the liquid above.

[0043] In another embodiment, it further includes: at least two groups of anti-top impact tools 120, which are detachably disposed in sequence between the wire rope cap 110 and the suction valve 130 to achieve anti-top impact.

[0044] In another embodiment, the anti-top impact tool 120 includes: an upper joint 121, whose upper end is detachably connected to the lower end of the wire rope cap 110; a center tube 120, which is detachably connected to the lower end of the upper joint 121, and a first wedge surface 122a is provided on the upper outer periphery of the center tube 122; a limit block 122b extending toward the outer periphery is provided in the middle of the center tube 120; an axially penetrating center hole 122c is provided inside the center tube 120; a slip 124, whose cover is provided on the outer periphery of the first wedge surface 122a, and a second wedge surface adapted to the first wedge surface is provided on the inner periphery of the slip 124; a spring 125, whose cover is provided on the middle and lower part of the center tube 122, and the upper end of the spring 125 abuts against the lower end of the limit block 122b; a sliding sleeve 126, whose cover is provided on the outer periphery of the limit block 122b, and the upper end abuts against the slip The lower ends of the bushes 124 are abutted against each other; a spring shield 127, which is arranged at the periphery of the spring 125, and the front part of the spring shield 127 is sealed and connected with the periphery of the limit block 122b; the rear part of the spring shield 127 is sealed and connected with the lower periphery of the center tube 122; a lower joint 128, which is arranged at the lower part of the center tube 122, the upper inner periphery of the lower joint 128 is adapted to the lower outer periphery of the spring shield 127, and the lower inner periphery of the lower joint 128 is adapted to the outer periphery of the center tube 122; a pressure transmission chamber 128a is formed between the lower joint 128, the spring shield 127 and the center tube 122; a pressure transmission hole 129, which is radially arranged at the lower part of the center tube 122, and the pressure transmission hole 129 connects the center hole 122c and the pressure transmission chamber 128a, and is used to transmit the pressure in the center tube 122 to the end of the spring shield 127. When the well is induced to flow, if gas rises, the pressure is transmitted to the end of the spring shield 127 through the pressure transmission hole 129, and the spring shield 127 pushes the sliding sleeve 126 and the slip 124 upward in sequence. The slip 124 slides along the first wedge surface and expands outward to form a damping effect.

[0045] In another embodiment, the upper end of the weight rod 140 is detachably connected to the end of the tube body 131 .

[0046] In another embodiment, the lower part of the rubber cylinder 136 is connected to the tube body 131 through a safety pin 137. When the lifting force is too large and it is judged that it is difficult to carry liquid, the safety pin 137 can be sheared by lifting up to make the rubber cylinder 136 slide to the lower part of the tube body 131 to achieve emergency release.

[0047] In another embodiment, an upper sliding sleeve assembly 138 is provided on the outer periphery of the upper portion of the tube body 131 , and the lower end of the upper sliding sleeve assembly 138 abuts against the rubber cylinder 136 .

[0048] In another embodiment, the wire rope cap 110, at least two sets of anti-top impact tools 120, the suction valve 130 and the weight rod 140 are detachably connected via threads.

[0049] In another embodiment, the slopes of the first wedge surfaces 122a of adjacent anti-impact cresting tools 120 are set in opposite directions to respectively achieve anti-impact cresting in upper and lower directions.

[0050] In summary, the present invention provides a wire rope lowering drainage suction device 1, which is provided with a wire rope cap 110 and a suction valve 130, which can form a negative pressure induced spray; and is provided with at least two sets of anti-topping tools 120, which can achieve anti-topping. The lower part of the rubber cylinder 136 is connected to the tube body 131 through a safety pin 137. When the lifting force is too large and it is judged that it is difficult to carry liquid, the safety pin can be lifted up to shear to achieve emergency release.

[0051] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A wire rope lowering drainage suction device, characterized in that: include: A wire rope cap, which is used to connect with the wire rope; A suction valve, the upper end of which is detachably connected to the wire rope cap and is used to be lifted up and lowered under the drive of the wire rope cap to realize the suction of the wellbore liquid; Wherein, the suction valve comprises: A tube body, wherein an axial tube cavity is provided inside, a pair of liquid discharge holes are radially opened at the upper part of the tube body, and a pair of liquid inlet holes are radially opened at the middle part of the tube body; A one-way valve seat is arranged in the upper middle part of the tube cavity, and a valve hole coaxial with the tube cavity is provided on the one-way valve seat, and the valve hole is a conical hole with a gradually decreasing aperture from top to bottom; A valve ball, which is arranged above the one-way valve seat and matched with the one-way valve seat, and is used to open or close the valve hole of the one-way valve seat, thereby limiting the fluid in the pipe body to flow in one direction from bottom to top; The rubber cylinder is covered on the upper part of the tube body. The outer circumference of the rubber cylinder is matched with the oil pipe clearance to generate negative pressure between the rubber cylinder and the oil pipe during the lifting process, so as to introduce liquid into the tube body from the liquid inlet hole and then be discharged through the liquid discharge hole and then pumped out.

2. The wire rope lowering drainage and suction device according to claim 1, characterized in that: Also includes: At least two groups of anti-top impact tools are detachably arranged in sequence between the wire rope cap and the suction valve to achieve anti-top impact.

3. The wire rope lowering drainage and suction device according to claim 2, characterized in that: The anti-capping tool comprises: An upper joint, the upper end of which is detachably connected to the lower end of the wire rope cap; A center tube is detachably connected to the lower end of the upper joint, a first wedge-shaped surface is provided on the upper periphery of the center tube; a stopper extending toward the periphery is provided in the middle of the center tube; and an axially penetrating center hole is provided inside the center tube; A slip, the cover of which is arranged on the outer periphery of the first wedge-shaped surface, and a second wedge-shaped surface adapted to the first wedge-shaped surface is arranged on the inner periphery of the slip; A spring, the cover of which is arranged in the lower middle part of the central tube, and the upper end of the spring abuts against the lower end of the limit block; A sliding sleeve, the sleeve is arranged on the outer periphery of the limit block, and the upper end of the sliding sleeve abuts against the lower end of the slip; A spring shield, which is arranged on the outer periphery of the spring, wherein the front part of the spring shield is sealed and connected to the outer periphery of the limit block; and the rear part of the spring shield is sealed and connected to the outer periphery of the lower part of the central tube; A lower joint, whose cover is arranged at the lower part of the central tube, the inner periphery of the upper part of the lower joint is matched with the outer periphery of the lower part of the spring shield, and the inner periphery of the lower part of the lower joint is matched with the outer periphery of the central tube; a pressure transmission chamber is formed between the lower joint, the spring shield and the central tube; A pressure transmission hole is radially arranged at the lower part of the central tube, and the pressure transmission hole communicates with the central hole and the pressure transmission cavity, and is used for transmitting the pressure in the central tube to the end of the spring shield.

4. The wire rope lowering drainage and suction device according to claim 3 is characterized in that: Also includes: The weighting rod has an upper end which is detachably connected to the end of the tube body.

5. The wire rope lowering drainage and suction device according to claim 1, characterized in that: The lower part of the rubber cylinder is connected to the tube body through a safety pin.

6. The wire rope lowering drainage and suction device according to claim 1, characterized in that: An upper sliding sleeve assembly is arranged on the outer periphery of the upper part of the tube body, and the lower end of the upper sliding sleeve assembly is in contact with the rubber cylinder.

7. The wire rope lowering drainage and suction device according to claim 4, characterized in that: The wire rope cap, at least two groups of anti-top impact tools, the suction valve and the weighting rod are detachably connected via threads.

8. The wire rope lowering drainage and suction device according to claim 3, characterized in that: The slopes of the first wedge-shaped surfaces of adjacent anti-collision tools are set in opposite directions, so as to realize anti-collision in upper and lower directions respectively.

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