Universal produced liquid sediment radical treatment device

Abstract

A universal produced liquid sediment radical treatment device relates to the technical field of petroleum equipment and comprises an upper connector, an outer working barrel, a liquid suction pipe, an eccentric single-flow filtrate pipe, a multifunctional spiral blade, a pure liquid isolation pipe and a lower connector, the multifunctional spiral blade is surrounded by the outer wall of the liquid suction pipe, and an arc-shaped hole is formed in the inner side of the multifunctional spiral blade. The upper portion of the eccentric single-flow filtrate pipe is provided with an open pipe wall, the lower portion of the eccentric single-flow filtrate pipe is closed, the lower end of the eccentric single-flow filtrate pipe is welded to the top end of the pure liquid isolation pipe, the whole formed by the eccentric single-flow filtrate pipe and the pure liquid isolation pipe is sleeved with the outer working barrel, and the top end of the outer working barrel is welded to the upper connector. The lower joint is welded at the bottom; a liquid inlet hole is formed in the outer working barrel. The universal produced liquid sediment radical treatment device not only can effectively separate liquid, gas, sand and dirt, but also can separate fine-particle muddy substances, the separation rate can reach 99% or above, and meanwhile, the separated substances can be automatically collected.

Description

Technical Field

[0001] This utility model relates to the field of petroleum equipment technology, specifically to a general-purpose produced fluid sediment removal device. Background Technology

[0002] During oilfield production, whether it's a pumping unit well, an electric arc pump well, or a screw pump well (including coalbed methane production wells), there's always the possibility of pump jamming after shutdown. Even with various sand control screens installed, the risk of pump jamming and screen blockage remains. Electric arc pump and screw pump wells, in particular, are prone to pump jamming during power outages or shutdowns because sand control screens cannot be installed. Furthermore, many wells contain produced fluids containing mud, cement, or rock powder, and currently, no tool (or method) can prevent these from entering the pump casing, resulting in a very high rate of pump jamming. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a universal extractable mud and sand removal device. It can not only effectively separate liquid, gas, sand and scale, but also separate fine mud particles with a separation rate of over 99%. At the same time, it can automatically collect the separated materials.

[0004] To address the problems existing in the background technology, this utility model adopts the following technical solution: It includes an upper connector, an outer working cylinder, a suction tube, an eccentric single-flow filtrate tube, a multifunctional spiral blade, a pure liquid isolation tube, and a lower connector. The outer wall of the suction tube surrounds the multifunctional spiral blade from top to bottom. The inner side of the multifunctional spiral blade is provided with several arc-shaped holes at equal intervals. The multifunctional spiral blade is fitted with an eccentric single-flow filtrate tube. The upper part of the eccentric single-flow filtrate tube has an open tube wall, and the lower part is closed. One side of the upper part of the multifunctional spiral blade is flush with the inner wall of the eccentric single-flow filtrate tube. The upper side of the multifunctional spiral blade is an open-type tube wall. The lower ring of the multifunctional spiral blade is welded to the inner wall of the eccentric single-flow filtrate tube. The lower end of the eccentric single-flow filtrate tube is welded to the top of the pure liquid isolation tube. A centralizer is provided at the bottom of the pure liquid isolation tube. The eccentric single-flow filtrate tube and the pure liquid isolation tube are fitted with an outer working cylinder. The top of the outer working cylinder is inserted into and welded to the upper connector. The part of the upper connector inserted into the outer working cylinder is connected to the suction tube. The bottom of the outer working cylinder is inserted into and welded to the lower connector. An inlet hole is opened at the top of the outer working cylinder.

[0005] The aforementioned arc-shaped holes encircle the outer wall of the suction tube from top to bottom, forming a channel between the arc-shaped holes and the suction tube.

[0006] One end of the upper connector is inserted into the outer working cylinder and fixedly connected, and the other end of the upper connector is connected to the external thread of the pump cylinder through the internal thread; one end of the lower connector is inserted into the outer working cylinder and fixedly connected, and the other end of the lower connector is connected to the screen pipe through the external thread, and the screen pipe is connected to the sediment tail pipe through the thread.

[0007] The number of liquid inlet holes is several, and the several liquid inlet holes are evenly distributed on the outer circumferential wall of the outer working cylinder; an air outlet hole is provided above the liquid inlet hole, and the number of air outlet holes is several, and the several air outlet holes are evenly distributed on the outer circumferential wall of the outer working cylinder, and the diameter of the air outlet hole is smaller than the diameter of the liquid inlet hole.

[0008] The eccentric single-flow filtrate tube is inserted into the outer working cylinder. The open-type tube wall at the top of the eccentric single-flow filtrate tube springs open and contacts the inner wall of the outer working cylinder, causing the eccentric single-flow filtrate tube to be eccentric in the outer working cylinder. A separation cavity is formed between the open-type tube wall and the inner wall of the outer working cylinder.

[0009] The centralizer consists of several blades that are dispersed downwards, with the tips of the blades abutting against the inner wall of the outer working cylinder.

[0010] The stabilizer forms a channel between itself and the inner wall of the outer working cylinder, and the channel is connected to the sedimentation tailpipe.

[0011] The stabilizer is equipped with a flow restrictor above it. The flow restrictor is located inside the pure liquid isolation tube. The flow restrictor is a steel plate with a small hole drilled in the center.

[0012] The suction tube has a return hole at the bottom, and there are several return holes. These return holes are distributed not only from top to bottom, but also on the outer circumferential wall of the suction tube.

[0013] The suction tube is not equipped with a multi-functional spiral blade at the tail end.

[0014] The beneficial effects of this utility model are:

[0015] 1. The multi-functional spiral blades used have a small pitch, resulting in good centrifugation effect and thorough separation;

[0016] 2. No matter how much debris and mud is separated, it will not cause pump jamming;

[0017] 3. The separated gas flows through its own channel and will not re-enter the liquid, resulting in multiple separations;

[0018] 4. This utility model can not only separate sand, scale, and gas, but also separate fine mud particles;

[0019] 5. It works even better when used in screw pumps and electric pump wells due to its high flow rate and large centrifugal force;

[0020] 6. This utility model uses an eccentric single-flow filtration tube for separation. With the cooperation of the pure liquid isolation tube, the separated substances will never be sucked into the suction tube.

[0021] 7. A flow restrictor is used to accelerate the settling speed of the separated material when there is too much sediment. This is because the separated material has a larger mass than the liquid in the pure liquid isolation tube, which can generate microcirculation and accelerate the settling speed of the sediment.

[0022] 8. This utility model has a reasonable design and is easy to operate. All internal vulnerable parts are made of stainless steel, requiring no disassembly and requiring no maintenance for life. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the outer working cylinder of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of this utility model;

[0025] Figure 3 This is a partially enlarged view of the present invention;

[0026] Figure 4 This utility model is a three-dimensional eccentric single-flow filtrate tube. Figure 1 ;

[0027] Figure 5 This utility model is a three-dimensional eccentric single-flow filtrate tube. Figure 2 ;

[0028] Figure 6 This is a perspective view of the connection relationship between the eccentric single-flow filtrate tube and the outer working cylinder of this utility model;

[0029] Figure 7 This is a cross-sectional view showing the connection relationship between the eccentric single-flow filtrate tube and the outer working cylinder of this utility model;

[0030] Figure 8 This is a schematic diagram of the structure of the centralizer of this utility model;

[0031] Figure 9 This is a schematic diagram of the current limiting plate structure of this utility model;

[0032] Figure 10 This is a schematic diagram of the upper connector structure of this utility model;

[0033] Figure 11 This is a schematic diagram of the lower connector structure of this utility model. Detailed Implementation

[0034] Referring to the figures, the present invention specifically adopts the following embodiment: It includes an upper connector 1, an outer working cylinder 14, a suction tube 9, an eccentric single-flow filtrate tube 8, a multifunctional spiral blade 7, a pure liquid isolation tube 10, and a lower connector 5. The outer wall of the suction tube 9 surrounds the multifunctional spiral blade 7 from top to bottom. The inner side of the multifunctional spiral blade 7 is provided with several arc-shaped holes 15 at equal intervals. The multifunctional spiral blade 7 is fitted with the eccentric single-flow filtrate tube 8. The upper part of the eccentric single-flow filtrate tube 8 is an open-type tube wall 6, and the lower part is closed. One side of the upper part of the multifunctional spiral blade 7 is welded to the inner wall of the eccentric single-flow filtrate tube 8. The upper part of the blade 7 has an open-type tube wall 6 on the other side. The lower part of the multi-functional spiral blade 7 is welded to the inner wall of the eccentric single-flow filtrate tube 8. The lower end of the eccentric single-flow filtrate tube 8 is welded to the top of the pure liquid isolation tube 10. The bottom end of the pure liquid isolation tube 10 is provided with a stabilizer 13. The eccentric single-flow filtrate tube 8 and the pure liquid isolation tube 10 are fitted with an outer working cylinder 14. The top of the outer working cylinder 14 is inserted into and welded to the upper connector 1. The part of the upper connector 1 inserted into the outer working cylinder 14 is connected to the suction tube 9. The bottom end of the outer working cylinder 14 is inserted into and welded to the lower connector 5. The upper part of the outer working cylinder 14 has a liquid inlet hole 3. The several arc-shaped holes 15 surround the outer wall of the suction tube 9 from top to bottom, and a channel is formed between the arc-shaped holes 15 and the suction tube 9. One end of the upper connector 1 is inserted into and fixedly connected to the outer working cylinder 14, and the other end of the upper connector 1 is connected to the external thread of the pump cylinder through an internal thread. One end of the lower connector 5 is inserted into and fixedly connected to the outer working cylinder 14, and the other end of the lower connector 5 is connected to the screen pipe through an external thread. The screen pipe is connected to the sedimentation tail pipe through a thread. There are several liquid inlet holes 3, which are evenly distributed on the outer circumferential wall of the outer working cylinder 14. Above each liquid inlet hole 3, there is a number of air outlet holes 2, which are evenly distributed on the outer circumferential wall of the outer working cylinder 14. The diameter of the air outlet holes 2 is smaller than the diameter of the liquid inlet holes 3. The eccentric single-flow filtrate tube 8 is fitted into the outer working cylinder 14. The open-type tube wall 6 at the top of the eccentric single-flow filtrate tube 8 springs open and contacts the inner wall of the outer working cylinder 14, causing the eccentric single-flow filtrate tube 8 to be eccentric within the outer working cylinder 14. A separation cavity 16 is formed between the open-type tube wall 6 and the inner wall of the outer working cylinder 14. The centralizer 13 is composed of several blades that are dispersed downwards, with the blade tips abutting against the inner wall of the outer working cylinder 14. A channel is formed between the centralizer 13 and the inner wall of the outer working cylinder 14, and the channel communicates with the sedimentation tail pipe. A flow-limiting plate 12 is provided above the centralizer 13. The flow-limiting plate 12 is located inside the pure liquid isolation tube 10. The flow-limiting plate 12 is a steel plate with a small hole 11 drilled in the center. The suction tube 9 has several return holes 17 at its lower part. These return holes 17 are distributed not only from top to bottom, but are also distributed on the outer circumferential wall of the suction tube 9. The suction tube 9 does not have a multi-functional spiral blade 7 at its tail.

[0035] When using this universal produced fluid and sludge removal device, the mixed liquid is drawn in through the inlet hole 3 at the top of the outer working cylinder 14 and falls onto the multi-functional spiral blades 7. The mixed liquid rotates and flows along the multi-functional spiral blades 7 from top to bottom. During this rotational movement, the mixed liquid passes through multiple stages of the multi-functional spiral blades 7. During the rotation, gas, liquid, sand, scale, and sludge are automatically separated at high speed. At the same time, due to the small pitch of the multi-functional spiral blades 7, a high-speed centrifugal force is generated. Solid particles and sludge, due to their heavier mass, are thrown to the outside of the multi-functional spiral blades 7 under the action of centrifugal force and rotate along the inner wall of the eccentric single-flow filtration tube 8. The upper part of the eccentric single-flow filtration tube 8 has an open-type tube wall 6, which is connected to the inner cavity of the outer working cylinder 14. A separation chamber 16 is formed between the outer working cylinder 14 and the inner wall. When solid particles and muddy materials move to the open-type pipe wall 6, they will automatically enter the separation chamber 16 between the open-type pipe wall 6 and the outer working cylinder 14. They will then flow downwards along the wall of the separation chamber 16. The lower part of the eccentric single-flow filtrate pipe 8 is closed, so the solid particles and muddy materials flowing downwards along the wall of the separation chamber 16 will not enter the eccentric single-flow filtrate pipe 8. They will continue downwards through the pure liquid isolation pipe 10, which is a closed tubular structure. Solid particles and muddy materials will not enter the eccentric single-flow filtrate pipe 8 and the suction pipe 9 through the pure liquid isolation pipe 10. Continuing downwards, they will flow into the sedimentation tail pipe through the channel formed between the centralizer 13 and the outer working cylinder 14 and the lower connector, and will be deposited in the sedimentation tail pipe.

[0036] Heavier solid particles and muddy material in the mixed liquid are thrown to the outside of the multi-functional spiral blade 7 and separated along the separation chamber. The lighter clean liquid in the mixed liquid rotates inside the multi-functional spiral blade 7 and rotates along the multi-functional spiral blade 7 and the arc-shaped hole 15 opened inside the multi-functional spiral blade 7. The arc-shaped hole 15 and the outer wall of the suction pipe 9 form a channel. The clean liquid flows down along the channel. When the pump is started, when the clean liquid flows to the end of the suction pipe 9, the pump will draw the clean liquid into the suction pipe 9 and finally re-enter the pump through the suction pipe 9 and the upper connector 1.

[0037] A pure liquid isolation tube 10 is added to the bottom of the eccentric single-flow filtrate tube 8. First, it serves to isolate the separated solid particles and mud in the cavity formed between the pure liquid isolation tube 10 and the inner wall of the outer working cylinder 14, preventing the separated solid particles and mud from being sucked into the suction tube 9. Second, it provides space, ensuring that there is enough storage space when the clean liquid flows to the end of the suction tube 9, so that the clean liquid is sucked into the suction tube 9 in an orderly and unobstructed manner.

[0038] When the separated solid particles and muddy material pass through the suction pipe 9, they will not be sucked in by the pure liquid isolation pipe 10 (the internal and external liquids are sealed and isolated). A screen pipe is connected between the sediment tail pipe and the lower connector 5. When the sediment tail pipe is full of sediment, the excess sediment will flow into the casing from the lower screen pipe of the lower connector 5, and will not be drawn into the pump barrel due to excessive sediment, causing pump jamming.

[0039] When the liquid stops rotating, the gas in the mixed liquid, being the lightest, will definitely move upwards. The gas will move upwards through the arc-shaped hole 15 and be discharged from the gas outlet 2 at the top of the outer working cylinder 14. It will not follow the mixed liquid back in through the liquid inlet 3. The gas discharge and the mixed liquid entry are separated by two holes, each going through its own hole, to avoid secondary separation.

[0040] The diameter of the vent 2 is smaller than that of the inlet 3 because the gas has a low density and a small volume, so it can be discharged through the smaller vent 2. However, the mixed liquid has a high density and a large volume, so it needs to enter through the larger inlet 3.

[0041] The tail end of the suction tube 9 is provided with several return holes 17. The tail end of the suction tube 9 is not provided with a multi-functional spiral blade 7. The return holes 17 occupy the end of the multi-functional spiral blade 7 and also occupy the tail end of the suction tube 9 without the multi-functional spiral blade 7. When clean liquid flows downward, it can not only be sucked into the suction tube 9 at the end of the suction tube 9, but also sucked into the suction tube 9 through the return holes 17.

[0042] The pure liquid isolation tube 10 and the stabilizer 13 are integrated into one structure. The stabilizer 13 is open downwards and dispersed. The stabilizer 13 abuts against the inner wall of the outer working cylinder 14, which plays the role of aligning the eccentric single-flow filtrate tube 8 and the pure liquid isolation tube 10 as a whole, preventing the eccentric single-flow filtrate tube 8 and the pure liquid isolation tube 10 from moving around inside the outer working cylinder 14.

[0043] A flow restrictor 12 is placed inside the pure liquid isolation tube 10 above the stabilizer 13. The small hole 11 drilled in the center of the flow restrictor 12 creates a microcirculation between the inner cavity of the pure liquid isolation tube 10 and the inner cavity of the outer working cylinder 14, which can accelerate the flow rate of solid particles and mud.

[0044] This utility model can be installed at the lower end of various oil pumps. For ordinary oil pump wells, a regular screen pipe can be installed below this utility model; for electric pump and screw pump wells, no screen pipe is installed; for sand settling tailpipes, more can be installed depending on the actual site conditions.

[0045] In summary, this general-purpose produced fluid sludge removal device utilizes multi-functional spiral blades with a small pitch, resulting in excellent centrifugal effect and thorough separation. Even with large amounts of separated debris and sludge, it will not cause pump jamming. The separated gas flows through its own channel, preventing re-entry with the liquid and subsequent multiple separations. This invention can separate not only sand, scale, and gas, but also fine sludge particles. It performs even better in screw pumps and electric pump wells due to its high flow rate and strong centrifugal force. The device employs an eccentric single-flow filtration tube for separation, and with the assistance of a pure liquid isolation tube, the separated material will never be sucked into the suction tube. The use of a flow restrictor accelerates the settling speed of the separated material, as the separated material has a larger mass than the liquid in the pure liquid isolation tube, creating micro-circulation and accelerating sediment settling. This invention is rationally designed, simple to operate, and all internal vulnerable parts are made of stainless steel, requiring no disassembly and lifetime maintenance.

Claims

1. A universal produced fluid sediment removal device, characterized in that: The device includes an upper connector (1), an outer working cylinder (14), a suction tube (9), an eccentric single-flow filtrate tube (8), a multi-functional spiral blade (7), a pure liquid isolation tube (10), and a lower connector (5). The outer wall of the suction tube (9) surrounds the multi-functional spiral blade (7) from top to bottom. The inner side of the multi-functional spiral blade (7) is provided with several arc-shaped holes (15) at equal intervals. The multi-functional spiral blade (7) is covered by an eccentric single-flow filtrate tube (8). The upper part of the eccentric single-flow filtrate tube (8) is an open tube wall (6), and the lower part of the eccentric single-flow filtrate tube (8) is closed. One side of the upper part of the multi-functional spiral blade (7) is welded to the inner wall of the eccentric single-flow filtrate tube (8), and the other side of the upper part of the multi-functional spiral blade (7) is an open tube wall. (6) The lower ring of the multifunctional spiral blade (7) is welded to the inner wall of the eccentric single-flow filtrate tube (8). The lower end of the eccentric single-flow filtrate tube (8) is welded to the top of the pure liquid isolation tube (10). The bottom end of the pure liquid isolation tube (10) is provided with a stabilizer (13). The eccentric single-flow filtrate tube (8) and the pure liquid isolation tube (10) are covered with an outer working cylinder (14). The top end of the outer working cylinder (14) is inserted into the upper connector (1) and welded to the upper connector (1). The part of the upper connector (1) inserted into the outer working cylinder (14) is connected to the suction tube (9). The bottom end of the outer working cylinder (14) is inserted into the lower connector (5) and welded to the lower connector (5). The upper part of the outer working cylinder (14) is provided with an inlet hole (3).

2. The universal produced fluid sediment removal device according to claim 1, characterized in that: The aforementioned arc-shaped holes (15) encircle the outer wall of the suction tube (9) from top to bottom, forming a channel between the arc-shaped holes (15) and the suction tube (9).

3. The universal produced fluid sediment removal device according to claim 1, characterized in that: One end of the upper connector (1) is inserted into the outer working cylinder (14) and fixedly connected, and the other end of the upper connector (1) is connected to the pump cylinder external thread through the internal thread; one end of the lower connector (5) is inserted into the outer working cylinder (14) and fixedly connected, and the other end of the lower connector (5) is connected to the screen pipe thread through the external thread, and the screen pipe is connected to the sediment tail pipe thread through the thread.

4. The universal produced fluid sediment removal device according to claim 1, characterized in that: The number of liquid inlet holes (3) is several, and the several liquid inlet holes (3) are evenly distributed on the outer circumferential wall of the outer working cylinder (14); an air outlet hole (2) is provided above the liquid inlet hole (3), and the number of air outlet holes (2) is several, and the several air outlet holes (2) are evenly distributed on the outer circumferential wall of the outer working cylinder (14). The diameter of the air outlet hole (2) is smaller than the diameter of the liquid inlet hole (3).

5. The universal produced fluid sediment removal device according to claim 1, characterized in that: The eccentric single-flow filtrate tube (8) is inserted into the outer working cylinder (14). The open-type tube wall (6) at the top of the eccentric single-flow filtrate tube (8) springs open and contacts the inner wall of the outer working cylinder (14), resulting in the eccentric single-flow filtrate tube (8) being eccentric in the outer working cylinder (14). A separation cavity (16) is formed between the open-type tube wall (6) and the inner wall of the outer working cylinder (14).

6. The universal produced fluid sediment removal device according to claim 1, characterized in that: The stabilizer (13) consists of several blades that are dispersed downwards, with the tips of the blades abutting against the inner wall of the outer working cylinder (14).

7. The universal produced fluid sediment removal device according to claim 1 or 6, characterized in that: A channel is formed between the stabilizer (13) and the inner wall of the outer working cylinder (14), and the channel is connected to the sedimentation tail pipe.

8. The universal produced fluid sediment removal device according to claim 1, characterized in that: The stabilizer (13) is provided with a flow restrictor (12) above it. The flow restrictor (12) is located inside the pure liquid isolation tube (10). The flow restrictor (12) is a steel plate with a small hole (11) drilled in the center of the flow restrictor (12).

9. The universal produced fluid sediment removal device according to claim 1, characterized in that: The suction tube (9) has a return hole (17) at the bottom. There are several return holes (17). The return holes (17) are distributed not only from top to bottom, but also on the outer circumferential wall of the suction tube (9).

10. The universal produced fluid sediment removal device according to claim 1, characterized in that: The suction tube (9) is not equipped with a multi-functional spiral blade (7) at its tail.

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