Anti-splashing device

Abstract

The invention relates to an anti-splashing device which comprises an inner screen pipe, an outer screen pipe and a blowout prevention container. A plurality of first through holes are formed in the pipe wall of the inner screen pipe; the two axial ends of the inner screen pipe respectively comprise an inner pipe liquid inlet and an inner pipe liquid outlet, and the inner pipe liquid outlet is closed; a plurality of second through holes are formed in the pipe wall of the outer screen pipe, the outer screen pipe is arranged on the periphery of the inner screen pipe in a sleeving mode, and a first buffer area is formed between the pipe walls of the outer screen pipe and the inner screen pipe; the blowout prevention container comprises a container liquid outlet, the outer screen pipe is installed in the blowout prevention container, and a second buffer area is formed between the pipe wall of the outer screen pipe and the blowout prevention container; and the second buffer area is communicated with the liquid outlet of the container. The device has the advantages that a triple pressure reduction structure of the inner screen pipe, the outer screen pipe and the blowout prevention box is arranged, high-pressure liquid sequentially impacts the pipe wall of the inner screen pipe, the pipe wall of the outer screen pipe and the inner wall of the blowout prevention box to complete pressure reduction for multiple times, the pressure of the finally discharged liquid meets the discharge requirement, and the liquid is prevented from splashing to pollute the environment.

Description

Technical Field

[0001] The invention relates to the technical field of oil testing operation equipment, in particular to an anti-splashing device. Background Art

[0002] At present, during the construction of oil test and blowout after fracturing and continuous tubing pressure drilling and plugging, due to the pressure in the well, the pressure of some self-flowing wells and pressure drilling and plugging wells reaches 30-40MPa. Therefore, during the construction process, the oil and gas brought out from the oil test outlet or circulation outlet often splashes on the surface of the circulation tank, causing environmental pollution.

[0003] Chinese patent CN204851157U discloses "a splash-proof device for testing oil pumping", which includes: a first tube body and a second tube body; the outer diameter of the first tube body is smaller than the inner diameter of the second tube body, a part of the first tube body in the length direction is located inside the second tube body, and the axis of the first tube body is parallel to the axis of the second tube body; a connecting mechanism is provided at the first end of the first tube body; the second end of the first tube body is located inside the second tube body and is closed; a plurality of first through holes are provided on the wall of the part of the first tube body located inside the second tube body, and a plurality of second through holes are provided at the second end of the second tube body, and the axis of the first through holes is perpendicular to the axis of the second through holes. The splash-proof device for testing oil pumping is installed at the outlet of the manifold, and the liquid gushing out from the manifold first enters the first tube body, and after impacting the closed second end of the first tube body, the flow rate is reduced and flows out from the first through hole on the first tube body into the second tube body; after the liquid enters the second tube body, it impacts the inner wall of the second tube body to further reduce the flow rate of the liquid, and finally flows out from the second through hole into the subsequent equipment.

[0004] However, although the above-mentioned oil test pumping anti-splashing device can reduce the liquid flow rate to a certain extent, when the liquid pressure and flow rate are too high, a part of the liquid still sprays out from the second through hole at a relatively high pressure after impacting the inner wall of the second tube body. Therefore, the anti-splashing effect of the oil test pumping anti-splashing device is poor. Summary of the invention

[0005] The object of the present invention is to provide a splash prevention device which can effectively reduce the outflow pressure of liquid.

[0006] The invention provides an anti-splashing device, comprising: an inner sieve tube, an outer sieve tube and an anti-splashing container; a plurality of first through holes are opened on the tube wall of the inner sieve tube; the axial ends of the inner sieve tube respectively comprise an inner tube liquid inlet and an inner tube liquid outlet, and the inner tube liquid outlet is closed; a plurality of second through holes are opened on the tube wall of the outer sieve tube, the outer sieve tube is sleeved on the outer periphery of the inner sieve tube, and a first buffer zone is formed between the tube walls of the outer sieve tube and the inner sieve tube; the anti-splashing container comprises a container liquid outlet, the outer sieve tube is installed in the anti-splashing container, and a second buffer zone is formed between the tube wall of the outer sieve tube and the anti-splashing container; and the second buffer zone is communicated with the container liquid outlet.

[0007] In one embodiment, along the radial direction of the inner sieve tube, the opening directions of some of the first through holes face the tube wall of the outer sieve tube.

[0008] In one embodiment, along the radial direction of the outer screen tube, the opening direction of the second through hole avoids the liquid outlet of the container.

[0009] In one embodiment, the anti-splashing device further comprises side baffles, and the two side baffles are respectively arranged at two axial ends of the outer sieve tube and close the first buffer zone in the axial direction of the outer sieve tube.

[0010] In one embodiment, the inner sieve and the outer sieve are coaxially arranged.

[0011] In one embodiment, the liquid outlet of the container is located at the bottom of the blowout preventer container; in the projection of the length direction of the blowout preventer container, the bottom width of the blowout preventer container gradually decreases in the gravity direction; the length direction is the axial direction of the inner screen tube.

[0012] In one embodiment, the anti-splashing device further includes a sand receiving assembly, which includes a sand receiving container. The sand receiving container is located in the anti-splashing container, and the outer screen pipe and the sand receiving container are arranged in sequence along the gravity direction.

[0013] In one embodiment, the sand receiving assembly includes a support member; a socket is opened on the side wall of the blowout preventer container, the support member is fixed in the blowout preventer container, the sand receiving container can be inserted into the blowout preventer container through the socket, and the support member supports the sand receiving container.

[0014] In one embodiment, the anti-splashing device further includes a liquid inlet pipe and a sampling pipe; the liquid inlet pipe is connected to the liquid inlet of the inner pipe, the sampling pipe and the liquid inlet pipe are interconnected, and a valve is provided on the sampling pipe.

[0015] In one embodiment, the anti-splashing device further includes a balancing tube and a plugging member, wherein the balancing tube is connected to the liquid outlet of the inner tube, and the plugging member plugs the tube outlet of the balancing tube, and the plugging member is detachably connected to the balancing tube.

[0016] The advantage of the present invention is that during the construction process, part of the high-pressure liquid enters the inner screen tube through the inner tube liquid inlet and impacts the tube wall of the inner screen tube to complete the first decompression; another part of the high-pressure liquid and the high-pressure liquid after decompression by impacting the tube wall of the inner screen tube flows into the first buffer zone from the first through hole, and impacts the tube wall of the outer screen tube to decompress again; the decompressed liquid flows into the second buffer zone from the second through hole, and impacts the inner wall of the blowout prevention container to decompress; the flow rate and pressure of the liquid after multiple decompressions are greatly reduced, and it flows out from the liquid outlet of the container to complete the external discharge of the high-pressure liquid. Compared with the prior art, the present invention adds an outer screen tube between the first tube body and the second tube body to achieve three decompressions of the high-pressure liquid, and the decompression effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0018] Figure 1 is a structural diagram of a splash prevention device in an embodiment of the present invention;

[0019] Figure 2 is a partial structural diagram of an anti-splashing device in an embodiment of the present invention;

[0020] Figure 3 is a partial structural diagram of a splash prevention device in an embodiment of the present invention;

[0021] Figure 4 is a structural diagram of a blowout prevention box in an embodiment of the present invention;

[0022] Figure 5 It is a partial structural diagram of the blowout prevention box in an embodiment of the present invention;

[0023] Figure 6 1 is a diagram of the inner sieve tube structure and an outer sieve tube structure in an embodiment of the present invention;

[0024] Figure 7 is a structural diagram of a support assembly in an embodiment of the present invention;

[0025] Figure 8 It is a structural diagram of a sand box in an embodiment of the present invention.

[0026] Reference numerals:

[0027] 1. Tank body; 2. Sealing piece; 3. Right cover plate; 4. Balance pipe; 5. Blowout preventer box; 6. Sampling tube; 7. Liquid inlet pipe; 8. Fastening clamp; 9. Left cover plate; 10. Vertical baffle plate; 11. Movable cover plate; 12. Base; 13. Support column; 14. Retaining ring; 15. Coupling; 16. Sand box; 17. Fixed ring; 18. Sampling gate; 19. Front cover plate; 20. Rear cover plate; 21. Support beam; 22. External screen tube; 23. Side hole of blowout preventer box; 24. Bottom of blowout preventer box; 25. Internal screen tube. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] See also Figures 1 to 3 The present embodiment discloses a splash prevention device, comprising a tank body 1, a balance pipe 4, a spray prevention box 5, a liquid inlet pipe 7, a vertical baffle 10, a coupling 15, an inner screen tube 25 and an outer screen tube 22; the spray prevention box 5 is the spray prevention container of the present invention.

[0030] Combination Figure 1The tank body 1 is a rectangular parallelepiped structure, and the vertical baffle 10 is vertically arranged inside the tank body 1, dividing the tank body 1 into a first chamber and a second chamber; the top of the vertical baffle 10 is provided with multiple through holes, and the first chamber and the second chamber are interconnected through the through holes; the advantage of the through holes being arranged at the top is that when the liquid in the first chamber is mixed with solids such as mud and sand, preliminary sedimentation can be carried out in the first chamber, and the solids in the liquid at the top of the first chamber are reduced. Even if there are still some solids at the top of the first chamber, they will be filtered and isolated in the first chamber by the through holes at the top, so that the solids in the liquid in the second chamber are reduced as much as possible. A movable cover 11 is arranged at the top of the second chamber, and the movable cover 11 can be a flip cover structure or a sliding cover structure, and the movable cover 11 can close the top opening of the second chamber.

[0031] Combination Figure 4 Circular spray-proof box side holes 23 are respectively provided on the side walls on both sides of the length direction of the spray-proof box 5, and a long strip-shaped spray-proof box bottom opening 24 is provided at the bottom of the spray-proof box 5.

[0032] Combination Figure 3 and Figure 6 The inner sieve tube 25 is coaxially arranged inside the outer sieve tube 22. The length of the inner sieve tube 25 is slightly longer than that of the outer sieve tube 22. A first buffer zone is formed between the inner sieve tube 25 and the tube wall of the outer sieve tube 22. Two retaining rings 14 are respectively arranged at the axial ends of the outer sieve tube 22. The outer periphery of the retaining ring 14 is fixedly connected to the inner wall of the outer sieve tube 22. The inner periphery of the retaining ring 14 is fixedly connected to the outer wall of the inner sieve tube 25. The two retaining rings 14 close the first buffer zone in the axial direction of the inner sieve tube 25. A plurality of second through holes 221 are evenly distributed on the wall of the outer sieve tube 22, and a plurality of first through holes 251 are evenly distributed on the wall of the inner sieve tube 25. The first through holes 251 are located in the area of ​​the inner sieve tube 25 covered by the outer sieve tube 22. In the radial direction of the inner sieve tube 25, the first through holes 251 face the wall of the outer sieve tube 22, so that the first through holes 251 and the second through holes 221 are staggered, and the liquid sprayed from the first through holes 251 is blocked by the wall of the outer sieve tube 22, thereby reducing the flow pressure of the liquid. The retaining ring 14 is a side baffle of the present invention.

[0033] In some embodiments, the arrangement density of the first through holes 251 is greater than the arrangement density of the second through holes 221 , and the first through holes 251 and the second through holes 221 are arranged in different ways.

[0034] Combination Figure 3The outer sieve tube 22 is arranged in the blowout preventer box 5, and the two extended ends of the outer sieve tube 22 are respectively located in the two blowout preventer box side holes 23, and the outer circumference of the tube wall of the outer sieve tube 22 abuts against the inner circumference of the blowout preventer box side holes 23. The second through holes 221 are all located inside the blowout preventer box 5, and a second buffer zone is formed between the outer wall of the outer sieve tube 22 and the inner wall of the blowout preventer box 5. The liquid flowing out through the second through holes 221 enters the second buffer zone and is sprayed on the inner wall of the blowout preventer box 5 to reduce the pressure again. Under the action of gravity, it finally flows out from the long strip blowout preventer box bottom opening 24 at the bottom of the blowout preventer box 5. The blowout preventer box bottom opening 24 is the liquid outlet of the container of the present invention.

[0035] In some embodiments, the blowout preventer box 5 further includes an inner baffle, which is fixedly connected to the inner wall of the blowout preventer box 5 and extends toward the wall of the outer sieve tube 22; of course, the extended end of the inner baffle is inclined toward the bottom opening 24 of the blowout preventer box, and the inner baffle blocks the second through hole 221 in the radial direction of the outer sieve tube 22, and the high-pressure liquid overflowing from the second through hole 221 impacts the inner baffle to reduce the liquid flow rate.

[0036] Combination Figure 2 and Figure 3 , the two extended ends of the inner sieve tube 25 extend from the side hole 23 of the blowout prevention box to the outside of the blowout prevention box 5 respectively. The two extended ends of the inner sieve tube 25 are the inner tube liquid inlet and the inner tube liquid outlet respectively. The inner tube liquid inlet is connected to the liquid inlet pipe 7 through a coupling 15, and the inner tube liquid outlet is connected to the balance pipe 4 through a coupling 15. The extended end of the balance pipe 4 is provided with a plugging member 2, and the plugging member 2 closes the pipe opening of the balance pipe 4. A sampling tube 6 is provided on the tube wall of the liquid inlet pipe 7, which is interconnected with the sampling tube 6. The sampling tube 6 is an L-shaped tube and a sampling gate 18 is provided on the sampling tube 6. The sampling gate 18 is a valve of the present invention. The liquid outlet of the sampling tube 6 is arranged downward to facilitate sampling from the sampling container.

[0037] Combination Figure 2 Along the length direction of the tank body 1, the right cover plate 3 and the left cover plate 9 are respectively covered on the opposite sides of the top opening of the first chamber, and a spray-proof box installation position is sandwiched between the two; along the width direction of the tank body 1, a front cover plate 19 and a rear cover plate 20 are respectively arranged on both sides of the spray-proof box installation position.

[0038] Combination Figure 2 and Figure 7 Along the width direction of the tank body 1, a base 12 is respectively provided on the top of the two side walls of the tank body 1, and a support column 13 is fixedly connected to the base 12, and a fastening clamp 8 is provided on the top of the support column 13; after the balance pipe 4 and the liquid inlet pipe 7 are respectively clamped and fixed by the fastening clamp 8, the lower part of the spray-out box 5 is embedded in the first chamber by the spray-out box installation position, and the spray-out box bottom 24 extends along the width direction of the tank body 1 and faces the bottom plate of the tank body 1. The fastening clamp 8, the base 12 and the support column 13 constitute a support assembly.

[0039] Furthermore, along the radial direction of the outer screen tube 22, the opening direction of the second through hole 221 avoids the bottom opening 24 of the blowout preventer box as much as possible, so that the liquid flowing out of the second through hole 221 impacts the inner wall of the blowout preventer box 5 and decompresses, and then flows into the first chamber from the bottom opening 24 of the blowout preventer box.

[0040] Combination Figure 4 Furthermore, the bottom of the blowout preventer box 5 is set to be tightened, that is, in the projection of the length direction of the blowout preventer box 5, the bottom width of the blowout preventer box 5 gradually decreases in the gravity direction, forming a certain slope at the bottom of the blowout preventer box 5, forming a certain liquid collection effect, so that the liquid in the blowout preventer box 5 can be emptied as much as possible; the length direction of the blowout preventer box 5 is the axial direction of the inner screen tube 25.

[0041] In some embodiments, the bottom cross-section of the blowout preventer box 5 is semicircular or arc-shaped.

[0042] In some embodiments, the top of the spray box 5 includes a spray box top cover, which is hinged to the side wall of the spray box in an openable and closable manner, and the spray box top cover and the side wall of the spray box are sealed by a sealing ring.

[0043] Combination Figures 2 to 5 as well as Figure 8 Furthermore, the anti-splash device further includes a sand receiving assembly, which includes a sand receiving box 16 and a support beam 21. A socket 51 is provided on one side wall of the blowout prevention box 5. The support beam 21 extends from the socket to the inside of the blowout prevention box 5 along the width direction of the blowout prevention box 5. The sand receiving box 16 is inserted into the blowout prevention box 5 from the socket 51. The support beam 21 supports the sand receiving box 16, and the sand receiving box 16 slides on the support beam 21. In the working state, the sand receiving box 16 is located below the outer screen tube 22. A mutually matching fixing ring 17 is respectively provided on the sand receiving box 16 and the blowout prevention box 5. When the sand receiving box 16 is inserted into the working position, the two mutually matching fixing rings 17 are opposite to each other, and the sand receiving box 16 and the blowout prevention box 5 can be locked together by a locking member. Specifically, two sand receiving boxes 16 are provided, and the two sand receiving boxes 16 are sequentially provided in the axial direction of the outer screen tube 22.

[0044] In some embodiments, the support beam 21 is a slide rail, and a slide groove or slideway matching the support beam 21 is provided at the bottom of the sand receiving box 16 .

[0045] In some embodiments, the locking member is a latch, and the insertion rod of the latch passes through two oppositely arranged fixing rings 17 in sequence, and the latch is limitedly matched with the fixing rings 17 on the sand receiving box 16 in the withdrawal direction and the insertion direction of the sand receiving box 16. Preferably, the outer diameter of the insertion rod is equal to or slightly smaller than the inner diameter of the fixing ring 17.

[0046] In summary, the inner sieve tube 25, the outer sieve tube 22 and the blowout prevention box 5 successively reduce the pressure of the high-pressure liquid, so that the pressure of the liquid finally discharged meets the discharge requirements, avoiding liquid splashing and polluting the environment. The first through hole 251 faces the wall of the outer sieve tube 22, so that the first through hole 251 and the second through hole 221 are staggered, and the liquid sprayed from the first through hole 251 is blocked by the wall of the outer sieve tube 22, reducing the flow pressure of the liquid. Similarly, the opening direction of the second through hole 221 avoids the bottom opening 24 of the blowout prevention box as much as possible, so that the liquid flowing out of the second through hole 221 impacts the inner wall of the blowout prevention box 5 and flows into the first chamber from the bottom opening 24 of the blowout prevention box after decompression. The setting of the sand receiving box 16 can reduce the entry of mud and sand into the first chamber. The setting of the L-shaped tube makes the sampling pressure of the sampling tube 6 smaller, which is convenient for sampling.

[0047] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A splash prevention device, characterized in that: include: Inner screen, outer screen and blowout preventer container; A plurality of first through holes are provided on the wall of the inner sieve tube; the axial ends of the inner sieve tube respectively include an inner tube liquid inlet and an inner tube liquid outlet, and the inner tube liquid outlet is closed; A plurality of second through holes are opened on the wall of the outer sieve tube, the outer sieve tube is sleeved on the outer circumference of the inner sieve tube, and a first buffer zone is formed between the outer sieve tube and the wall of the inner sieve tube; The blowout prevention container comprises a container liquid outlet, the outer screen tube is installed in the blowout prevention container, a second buffer zone is formed between the tube wall of the outer screen tube and the blowout prevention container; and the second buffer zone is communicated with the container liquid outlet.

2. The splash protection device according to claim 1, characterized in that: Along the radial direction of the inner sieve tube, at least part of the first through holes open toward the tube wall of the outer sieve tube.

3. The splash protection device according to claim 1 or 2, characterized in that: Along the radial direction of the outer screen tube, the opening direction of the second through hole avoids the liquid outlet of the container.

4. The splash prevention device according to claim 1 or 2, characterized in that: The anti-splashing device further comprises side baffles. The two side baffles are respectively arranged at two axial ends of the outer sieve tube and close the first buffer zone in the axial direction of the outer sieve tube.

5. The splash prevention device according to claim 1 or 2, characterized in that: The inner sieve tube and the outer sieve tube are coaxially arranged.

6. The splash prevention device according to claim 1 or 2, characterized in that: The container liquid outlet is located at the bottom of the blowout preventer container; in the projection of the length direction of the blowout preventer container, the bottom width of the blowout preventer container gradually decreases in the gravity direction; the length direction is the axial direction of the inner screen tube.

7. The splash prevention device according to claim 1 or 2, characterized in that: The anti-splashing device further comprises a sand receiving assembly, wherein the sand receiving assembly comprises a sand receiving container, the sand receiving container is located in the anti-splashing container, and the outer screen pipe and the sand receiving container are sequentially arranged along the gravity direction.

8. The splash protection device according to claim 7, characterized in that: The sand receiving assembly includes a support member; a socket is opened on the side wall of the blowout prevention container, the support member is fixed in the blowout prevention container, the sand receiving container can be inserted into the blowout prevention container through the socket, and the support member supports the sand receiving container.

9. The splash prevention device according to claim 1 or 2, characterized in that: The anti-splashing device also includes a liquid inlet pipe and a sampling pipe; the liquid inlet pipe is connected to the liquid inlet of the inner pipe, the sampling pipe is communicated with the liquid inlet pipe, and a valve is arranged on the sampling pipe.

10. The splash protection device according to claim 9, characterized in that: The anti-splashing device also includes a balancing pipe and a blocking piece. The balancing pipe is connected to the liquid outlet of the inner pipe. The blocking piece blocks the pipe opening of the balancing pipe. The blocking piece is detachably connected to the balancing pipe.

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