Sand prevention device for rotary pumping of perforation joint seat tubular column
By setting up a sand-proof mechanism below the oil pumping mechanism of the perforated seat tube column, solid-liquid separation is achieved by cyclone flow and centrifugal movement, the problem of sand-proof failure after transfer and pumping in the prior art is solved, and equipment wear and production costs are reduced.
Patent Information
- Application Number
- CN202421418257.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The existing perforated seat pipe column cannot prevent sand from coming out of the well during the pumping, resulting in equipment wear, pump valve failure and pump clamping, which increases the pump inspection cycle and cost.
A perforated joint tube column rotation and sand prevention device is designed. By setting up a sand prevention mechanism below the oil pumping mechanism, including a sand sinking pipe, a sand prevention pipe and a spiral channel, the solid-liquid separation is achieved by cyclonic flow and centrifugal movement of the mixed liquid to prevent sand particles from entering the oil pump.
It effectively prevents sand particles from entering the oil pump, reduces equipment wear and pump jams, shortens the pump inspection cycle and frequency, and reduces production costs.
Smart Images
Figure CN222576647U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of petroleum production machinery, in particular to a perforating joint pipe column rotation and pumping sand prevention device. Background Art
[0002] Perforation completion is a common completion method. The perforating gun opens some channels between the casing, cement sheath and formation in a certain layer of the oil layer, allowing the formation fluid to flow into the wellbore. In order to facilitate the operation and simplify the process, a perforating string (perforating string + rod pump seat) is usually assembled. When performing the pumping operation, the rod string is lowered to carry the rod pump to realize pumping.
[0003] However, for wells with sand production, this type of pipe and rod combination does not have the effect of preventing sand, and severe sand production will accelerate the wear of downhole equipment, pump valve failure, pump jam, etc. In addition, ordinary rod pumps are usually unable to unblock, which will greatly extend the pump inspection cycle and increase production costs.
[0004] Therefore, it is desired in the art to provide a perforation joint pipe string rotation and pumping sand prevention device to solve the above technical problems. Utility Model Content
[0005] The purpose of the utility model is to propose a perforating joint pipe column rotation and pumping anti-sand device, which solves the problem that the prior art cannot prevent sand after rotation and pumping, and protects the overall structure of the oil pump and prevents the pump from getting stuck, thereby reducing the pump inspection cycle and frequency, and further reducing the cost of production operations and the cost of manpower output.
[0006] According to the utility model, a perforating joint pipe string rotation and pumping sand prevention device is provided, comprising a perforating pipe string concentrically arranged in a casing,
[0007] An oil pumping mechanism is arranged below the perforating string, the oil pumping mechanism comprises an oil pump and an oil pumping pipe arranged below the oil pump, and
[0008] A sand prevention mechanism is arranged below the oil pump, and the sand prevention mechanism includes a sand settling pipe fixed on the pump barrel and covering the outside of the oil pumping pipe, a sand prevention pipe arranged between the oil pumping pipe and the sand settling pipe, and a spiral channel formed between the sand prevention pipe and the oil pumping pipe and causing the mixed liquid to generate a swirl.
[0009] In one embodiment, a plurality of spiral channels are arranged at intervals along the circumference of the oil pumping pipe.
[0010] The mixed liquid generates a vortex after passing through the spiral channel and is separated in the sand settling tube. The separated liquid phase is discharged through the oil pump and the oil pump, and the separated solid phase is deposited at the bottom of the sand settling tube.
[0011] In one embodiment, the sand control tube and the spiral channel are both within the range of the oil pumping pipe in the axial direction.
[0012] In one embodiment, a filter screen is provided at the bottom of the oil extraction pipe.
[0013] In one embodiment, a plurality of inlets are arranged at intervals along the circumference of the sand settling pipe and allow the mixed liquid to enter, and the inlets are located above the sand control pipe.
[0014] In one embodiment, the sand settling pipe comprises a guide section and a sand settling section, the inner diameter of the sand settling section is larger than the inner diameters of the guide section and the sand control pipe, and the inlet is radially arranged on the guide section.
[0015] In one embodiment, a plurality of sand collecting barrels arranged in series are provided at the bottom of the sand settling pipe, and the inner diameter of the sand collecting barrel is not less than the inner diameter of the sand settling section.
[0016] In one embodiment, the oil pump comprises a pump barrel, and a locking portion arranged on the outer wall of the pump barrel, wherein a hanging groove for forming a snap connection with the locking portion is provided on the inner wall of the sleeve.
[0017] In one embodiment, the oil pump further comprises a plunger disposed in the pump barrel and forming a sealed connection.
[0018] At least one oil inlet valve is arranged in the pump barrel, and at least one oil outlet valve is arranged in the plunger.
[0019] In one embodiment, the oil pump further comprises a valve stem extending into the pump barrel and fixedly connected to the plunger.
[0020] A guide sleeve is provided at the top end of the pump barrel and is sealedly connected to the valve stem.
[0021] Compared with the prior art, the advantages of the utility model are:
[0022] First, the utility model improves the pumping mechanism, that is, a sand prevention mechanism is arranged below the pumping mechanism. Therefore, when the perforating joint pipe string rotates to pump the sand prevention device, the mixed liquid can more easily perform centrifugal motion in the lower part of the sand settling tube to achieve solid-liquid separation, thereby helping to achieve the purpose of sand prevention.
[0023] Preferably, the mixed liquid enters different spiral channels, and the mixed liquid passing through the spiral channels will generate vortex and perform centrifugal motion at the bottom of the sand settling tube. Since the solid phase and the liquid phase have different purposes, the solid phase particles with high density will be subjected to a large centrifugal force and then thrown to the inner wall of the sand settling tube, and then settle to the bottom of the sand settling tube under the action of their own gravity, and the liquid phase (oil) with low density will be subjected to a small centrifugal force and then be located at the center of the sand settling tube, so that it can more easily enter the plunger through the oil pumping pipe.
[0024] Secondly, the utility model can solve the problem that the prior art cannot prevent sand after pumping, and protects the overall structure of the oil pump and prevents the pump from getting stuck, thereby reducing the pump inspection cycle and frequency, and further reducing the cost of production operations and the cost of manpower output. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:
[0026] Figure 1 The structure of the perforating joint pipe string rotation and pumping sand prevention device according to the utility model is schematically shown.
[0027] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION
[0028] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.
[0029] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
[0030] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.
[0031] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0032] The utility model will be further described below in conjunction with the accompanying drawings.
[0033] Figure 1 The structure of the perforating joint pipe string pumping sand control device 100 according to the utility model is schematically shown.
[0034] like Figure 1 As shown, the perforating joint pipe string pumping sand prevention device 100 according to the utility model mainly includes a perforating pipe string (not shown), an oil pumping mechanism and a sand prevention mechanism connected in sequence. Preferably, the perforating pipe string is concentrically arranged in the casing 11; the oil pumping mechanism is arranged below the perforating pipe string, and the oil pumping mechanism includes an oil pump 20 for hanging in the casing 11 and an oil pumping pipe 12 arranged below the oil pump 20; the sand prevention mechanism is arranged below the oil pump 20, and the sand prevention mechanism can make the mixed liquid do centrifugal movement to help the oil pump 20 extract the separated liquid phase (oil), and its content is introduced below.
[0035] In one embodiment, Figure 1 As shown, the sand control mechanism includes a sand settling pipe 31. Preferably, the sand settling pipe 31 is covered on the outside of the oil pumping pipe 12, and the top of the sand settling pipe 31 is fixedly connected to the lower end surface of the pump barrel 21 (described below) of the oil pump 20 to further improve the stability of the sand control mechanism.
[0036] In one embodiment, Figure 1 As shown, the sand control mechanism further includes a sand control pipe 32 and a spiral channel 33. Preferably, the sand control pipe 32 is arranged between the oil extraction pipe 12 and the sand settling pipe 31, and the spiral channel 33 is between the sand control pipe 32 and the oil extraction pipe 12, so that the mixed liquid discharged through the spiral channel 33 and entering the lower part of the sand settling pipe 31 will generate a vortex.
[0037] In the utility model, the outer surface of the sand prevention tube 32 forms a sealed connection with the inner surface of the sand settling tube 31. Therefore, the mixed liquid can only flow to the lower part of the sand settling tube 31 through a single channel, the spiral channel 33, to ensure that all the mixed liquid can generate a vortex in the lower part of the sand settling tube 31.
[0038] In one embodiment, Figure 1 As shown, a plurality of inlets 311 are arranged at intervals along the circumference of the sand settling tube 31. Therefore, when the oil pump 20 is pumping oil, the mixed liquid can smoothly enter the sand settling tube 31 through the inlet 311, and then flow out through the spiral channel 33 to generate a vortex, and perform centrifugal motion in the sand settling tube 31, further improving the solid-liquid separation effect of the mixed liquid.
[0039] Preferably, all inlets 311 are located above the sand control tube 32. In other words, the mixed liquid entering through the inlet 311 must pass through the spiral channel 33 before flowing to the lower part of the sand settling tube 31, thereby ensuring that the mixed liquid can generate a vortex in the lower part of the sand settling tube 31.
[0040] In one embodiment, Figure 1 As shown, a plurality of spiral channels 33 are arranged at intervals along the circumference of the oil extraction pipe 12. Therefore, the mixed liquid can enter different spiral channels 33 respectively, and the mixed liquid passing through the spiral channels 33 will generate swirl and perform centrifugal motion at the lower part of the sand settling tube 31.
[0041] As a result, the solid particles with high density will be subjected to a larger centrifugal force and will be thrown to the inner wall of the sand settling tube 31, thereby settling to the bottom of the sand settling tube 31 under the action of their own gravity. The liquid phase (oil) with low density will be subjected to a smaller centrifugal force and will be located at the center of the sand settling tube 31, thereby being able to more easily enter the plunger 22 through the oil suction pipe 12.
[0042] Preferably, Figure 1 The motion trajectory shown in is the motion path of the liquid phase.
[0043] Preferably, a filter screen (not shown) is provided at the bottom of the pumping pipe 12. Therefore, when the liquid phase enters the pumping pipe 12 through the filter screen, further filtration can be achieved, thereby improving the filtration accuracy and sand control capability of the perforating joint pipe string pumping sand control device 100.
[0044] In one embodiment, the sand control tube 32 and the spiral channel 33 are both within the range of the pumping pipe 12 in the axial direction. In this way, not only the movement space of the mixed liquid in the sand settling tube 31 for centrifugal movement is effectively increased, so that the mixed liquid can be separated from the solid and liquid more easily and fully, but also the space for storing solid particles in the sand settling tube 31 can be effectively increased to further avoid the situation where the solid particles follow the liquid phase movement.
[0045] In one embodiment, the sand settling pipe 31 includes a guide section and a sand settling section. Preferably, the inner diameter of the sand settling section is larger than the inner diameters of the guide section and the sand control pipe 32. Therefore, the mixed liquid passing through the spiral channel 33 can generate a larger range of swirl in the sand settling pipe 31, thereby enhancing the solid-liquid separation capability of the mixed liquid, so that the liquid phase at the center of the sand settling pipe 31 can be extracted at a faster speed through the pumping pipe 12.
[0046] Preferably, the inlet 311 is radially arranged on the guide section. Therefore, the mixed liquid entering through the inlet 311 must pass through the spiral channel 33 before flowing to the lower part of the sand settling tube 31.
[0047] According to the utility model, the perforating joint pipe column rotation and extraction sand prevention device 100 also includes a plurality of sand collecting barrels (not shown) arranged in series. Preferably, the sand collecting barrel is arranged at the bottom of the sand settling pipe 31, and the inner diameter of the sand collecting barrel is not less than the inner diameter of the sand settling section. Therefore, the mixed liquid passing through the spiral channel 33 can generate a larger range of swirl in the sand settling pipe 31, thereby enhancing the solid-liquid separation capability of the mixed liquid.
[0048] In other embodiments, the inner diameter of the sand collecting barrel is consistent with the inner diameter of the sand settling section. Therefore, in terms of installation, the sand collecting barrel can be more easily fixed on the sand settling tube 31 and communicated with the sand settling tube 31, so as to help increase the space for storing solid phase particles. In addition, during the lowering process, the sand collecting barrel can more easily move smoothly in the casing 11.
[0049] In one embodiment, Figure 1 As shown, the oil pump 20 includes a pump barrel 21 and a locking portion 211 disposed on the outer wall of the pump barrel 21. Preferably, the locking portion 211 includes a limit block and a hook disposed below the limit block. In addition, a hanging groove 111 for forming a snap connection with the locking portion 211 is provided on the inner wall of the sleeve 11.
[0050] Therefore, when the oil pump 20 is lowered, the hook claw first contracts inwardly under the action of the inner wall of the casing 11, and when the limit block abuts against the inner wall of the casing 11, the hook claw enters the hanging groove 111 and expands outwardly to form a firm clamping connection, thereby ensuring that the oil pump 20 is smoothly clamped on the inner wall of the casing 11.
[0051] In one embodiment, Figure 1 As shown, the oil pump 20 further includes a plunger 22 disposed in the pump barrel 21 and forming a sealed connection, and a valve stem 23 extending and penetrating into the pump barrel 21. Preferably, the valve stem 23 is fixedly connected to the plunger 22, and a guide sleeve 24 is provided at the top end of the pump barrel 21 to form a sealed connection with the valve stem 23. In this way, the valve stem 23 can be ensured to be always in a centered state, thereby effectively preventing the eccentric wear of the valve stem 23 during the production process.
[0052] Preferably, if Figure 1 As shown, at least one oil inlet valve 201 is provided in the pump barrel 21, and at least one oil outlet valve 202 is provided in the plunger 22. The production process of the utility model is briefly described below in combination with the oil inlet valve 201 and the oil outlet valve 202:
[0053] In the present invention, when the plunger 22 performs an upward stroke movement in the pump barrel 21, the oil inlet valve 201 is opened and the oil outlet valve 202 is closed, and the mixed liquid enters the upper part of the sand settling tube 31 through the inlet 311, and then enters the lower part of the sand settling tube 31 through the spiral channel 33, and generates a vortex in the sand settling tube 31 to perform centrifugal movement.
[0054] During this process, solid particles with high density will be subjected to a larger centrifugal force and thus thrown to the inner wall of the sand settling tube 31, thereby settling to the bottom of the sand settling tube 31 under the action of their own gravity; the liquid phase (oil) with low density will be subjected to a smaller centrifugal force and thus be located at the center of the sand settling tube 31, thereby being able to enter the plunger 22 through the oil pumping pipe 12.
[0055] In the utility model, when the plunger 22 makes a downward stroke in the pump barrel 21, the oil outlet valve 202 is opened and the oil inlet valve 201 is closed, thereby allowing the oil to flow up and down through the pump body 21 and the plunger 22 in sequence, and the oil is discharged to the outside after the next upward stroke process to complete the downhole production work.
[0056] Preferably, the utility model solves the problem that the perforating joint pipe string cannot prevent sand after pumping, effectively prevents sand, prevents pump jams, and reduces the frequency of pump inspections. At present, there are 47 rod pump wells in production and operation, and 10 rod pump wells will be inspected from 2021 to 2023, generating an operating cost of 2.6 million yuan.
[0057] Compared with the prior art, the advantages of the present invention are:
[0058] First, the utility model improves the pumping mechanism, that is, a sand prevention mechanism is arranged below the pumping mechanism. Therefore, when the perforating joint pipe string rotates to pump the sand prevention device 100, the mixed liquid can more easily perform centrifugal motion in the lower part of the sand settling tube 31 to achieve solid-liquid separation, thereby helping to achieve the purpose of sand prevention.
[0059] Preferably, the mixed liquid enters different spiral channels 33, and the mixed liquid passing through the spiral channels 33 generates vortex flow and performs centrifugal motion at the lower part of the sand settling tube 31. Since the solid phase and the liquid phase have different purposes, the solid phase particles with high density will be subjected to a large centrifugal force and then thrown to the inner wall of the sand settling tube 31, and then settle to the bottom of the sand settling tube 31 under the action of their own gravity, and the liquid phase (oil) with low density will be subjected to a small centrifugal force and then be located at the center of the sand settling tube 31, so that it can more easily enter the plunger 22 through the oil pumping pipe 12.
[0060] Secondly, the utility model can solve the problem that the prior art cannot prevent sand after pumping, and protects the overall structure of the oil pump 20 and prevents the pump from getting stuck, thereby reducing the pump inspection cycle and frequency, and further reducing the cost of production operations and the cost of manpower output.
[0061] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.
Claims
1. A perforating joint pipe string pumping sand prevention device, characterized in that: include: a perforating string arranged concentrically in the casing (11), An oil pumping mechanism is arranged below the perforating string, the oil pumping mechanism comprising an oil pump (20) and an oil pumping pipe (12) arranged below the oil pump (20), and A sand prevention mechanism is arranged below the oil pump (20), the sand prevention mechanism comprising a sand settling pipe (31) fixed on the pump barrel (21) and covering the outside of the oil pumping pipe (12), a sand prevention pipe (32) arranged between the oil pumping pipe (12) and the sand settling pipe (31), and a spiral channel (33) formed between the sand prevention pipe (32) and the oil pumping pipe (12) and causing the mixed liquid to generate a swirl.
2. The perforating joint pipe string pumping sand control device according to claim 1, characterized in that: A plurality of spiral channels (33) are arranged at intervals along the circumference of the oil extraction pipe (12). The mixed liquid generates a vortex after passing through the spiral channel (33) and is separated in the sand settling tube (31). The separated liquid phase is discharged through the oil pump (12) and the oil pump (20), and the separated solid phase is deposited at the bottom of the sand settling tube (31).
3. The perforation joint pipe string pumping sand control device according to claim 2, characterized in that: The sand control pipe (32) and the spiral channel (33) are both located within the range of the oil pumping pipe (12) in the axial direction.
4. The perforating joint pipe string pumping sand control device according to claim 3, characterized in that: A filter screen is provided at the bottom of the oil extraction pipe (12).
5. The perforating joint pipe string pumping sand control device according to claim 4, characterized in that: A plurality of inlets (311) are arranged at intervals along the circumference of the sand settling pipe (31) and allow the mixed liquid to enter. The inlets (311) are located above the sand control pipe (32).
6. The perforating joint pipe string pumping sand control device according to claim 5, characterized in that: The sand settling pipe (31) comprises a guide section and a sand settling section, the inner diameter of the sand settling section is larger than the inner diameters of the guide section and the sand control pipe (32), and the inlet (311) is radially arranged on the guide section.
7. The perforating joint pipe string pumping sand control device according to claim 6, characterized in that: A plurality of sand collecting tubes arranged in series are provided at the bottom of the sand settling tube (31), and the inner diameter of the sand collecting tube is not less than the inner diameter of the sand settling section.
8. The perforating joint pipe string pumping sand control device according to claim 1, characterized in that: The oil pump (20) comprises a pump barrel (21) and a locking portion (211) arranged on the outer wall of the pump barrel (21), wherein a hanging groove (111) for forming a snap connection with the locking portion (211) is provided on the inner wall of the sleeve (11).
9. The perforating joint pipe string pumping sand control device according to claim 8, characterized in that: The oil pump (20) further comprises a plunger (22) disposed in the pump barrel (21) and forming a sealed connection. At least one oil inlet valve (201) is arranged in the pump barrel (21), and at least one oil outlet valve (202) is arranged in the plunger (22).
10. The perforating joint pipe string pumping sand control device according to claim 9, characterized in that: The oil pump (20) further comprises a valve stem (23) extending into the pump barrel (21) and fixedly connected to the plunger (22). A guide sleeve (24) is provided at the top end of the pump barrel (21) and is sealedly connected to the valve stem (23).