Garbage collecting device in pressure-controlled drilling choke manifold

Abstract

The utility model provides a garbage collecting device in a pressure-controlled drilling choke manifold, and belongs to the technical field of pressure-controlled drilling equipment. Comprising a filter barrel and a filter element assembly detachably installed in the filter barrel. The filter element assembly comprises an inner cylinder and an outer cylinder which are coaxially arranged in a sleeved mode, one end of the outer cylinder is detachably connected with the interior of the filter cylinder through a connecting base and communicated with the inlet pipe, one end of the inner cylinder is detachably connected with the connecting base and communicated with the inlet pipe through the connecting base, and a plug with a handle is arranged at the other end of the inner cylinder. A locking assembly used for limiting movement of the inner cylinder is arranged on the outer cylinder, and an end cover is detachably arranged on the filter cylinder. When the filter element assembly needs to be cleaned, only the inner barrel is pulled out to be cleaned by unlocking the locking assembly, the inner barrel and the outer barrel can be rotated together to be disassembled and cleaned at the same time, in the cleaning process of the inner barrel, the outer barrel can also play a role in partially intercepting impurities in drilling fluid, and the effect of protecting a drilling pipeline is achieved.

Description

Technical Field

[0001] This utility model relates to the field of controlled pressure drilling equipment technology, and in particular to a waste collection device in a controlled pressure drilling choke manifold. Background Technology

[0002] The choke manifold for controlled pressure drilling is an integrated manifold used in controlled pressure drilling technology. During controlled pressure drilling, it is inevitable that rock fragments (rock fragments that fall into the well due to loose rock in the open hole of a natural gas well, which will be carried to the choke manifold on the surface with the circulation of drilling fluid) and other foreign objects (even wrenches, large screws, towels, plastic, and rubber blocks that may have been accidentally dropped into the well being drilled for oil and gas) will be generated.

[0003] Patent CN206158629U discloses a high-pressure fine filtration manifold. The manifold mainly consists of two high-pressure filter sections, seven manual flat gate valves, two five-way connectors, four three-way connectors, and manifold piping. The two five-way connectors serve as the manifold's inlet and outlet, respectively. They are connected by three channels, one of which is a straight-through channel, and the other two channels are connected in series with high-pressure filter sections. The high-pressure filter sections contain erosion-resistant hard alloy filter cartridges with different slit sizes, machined using wire cutting technology. The two high-pressure filter sections can be alternately connected to the system for filtration operations, and the idle high-pressure filter sections can be cleaned simultaneously.

[0004] However, each time the filter cartridge and other structures in the high-pressure filter section are cleaned, the downhole space is small and the drilling fluid contains oil, so each cleaning takes a long time to remove debris and clean. If there is a lot of debris, the dual channels may not be able to switch automatically in time, and there is a risk that the controlled pressure drilling may not be able to resume temporarily. Utility Model Content

[0005] In view of the above problems, this utility model provides a waste collection device in a pressure-controlled drilling choke manifold.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A waste collection device for a pressure-controlled drilling choke manifold is provided, comprising a filter cylinder and a filter element assembly detachably installed inside the filter cylinder. One end of the filter cylinder is connected to an inlet pipe, and an outlet pipe is connected to the side wall of the filter cylinder.

[0008] The filter element assembly includes an inner cylinder and an outer cylinder coaxially fitted together. The outer cylinder has several first filter holes on its outer wall, and the inner cylinder has several second filter holes with a diameter smaller than the first filter holes on its outer wall. One end of the outer cylinder is provided with a connecting seat, and one end of the outer cylinder is detachably connected to the inside of the filter body through the connecting seat. One end of the outer cylinder is connected to the inlet pipe. The inner cylinder is coaxially inserted into the outer cylinder, and one end of the inner cylinder is detachably connected to the connecting seat. After the inner cylinder is connected to the connecting seat, it is connected to the inlet pipe. The other end of the inner cylinder is provided with a plug for cooperating with the outer cylinder, and the plug is provided with a handle. The outer cylinder is provided with a locking component for restricting the movement of the inner cylinder. The end of the filter body near the handle is detachably provided with an end cap.

[0009] Furthermore, the connecting seat includes a mounting sleeve and a sealing sleeve. The mounting sleeve is coaxially fixedly connected to one end of the outer cylinder and has an external thread. A connecting sleeve is provided on the inner wall of the filter cylinder near the inlet pipe. The mounting sleeve and the connecting sleeve are threadedly connected. The sealing sleeve is located inside the mounting sleeve and is used to seal the end of the inner cylinder when the inner cylinder and the outer cylinder are connected.

[0010] Furthermore, the sealing sleeve assembly includes a sealing ring retainer, a sealing ring, and a spring. The sealing ring retainer is coaxially slidably connected inside the mounting sleeve, and the spring is coaxially disposed inside the mounting sleeve. The spring is used to drive the sealing ring retainer to move towards the outer cylinder away from the mounting sleeve. The sealing ring is coaxially fixed at one end of the sealing ring retainer near the inner cylinder, and the sealing ring is used to make sealing contact with the end of the inner cylinder.

[0011] Furthermore, the locking assembly includes a guide block fixedly mounted on the outer wall of the inner cylinder. The inner wall of the outer cylinder has a first guide groove formed along the axial direction of the outer cylinder. The first guide groove is open at one end away from the connecting seat. A second guide groove is formed at the other end of the first guide groove that is away from its own opening and is arranged along the axial direction of the outer cylinder. A limit groove is formed at the other end of the second guide groove that is away from the first guide groove. The first guide groove and the second guide groove allow the guide block to slide within them. The limit groove is used to cooperate with the guide block to restrict the rotation of the inner cylinder.

[0012] Furthermore, a flange is fixedly installed on the outer wall of the filter cylinder, and the end cover and the flange are detachably connected by flange bolts.

[0013] Furthermore, the first filter hole is a strip-shaped hole, and the first filter hole is simultaneously connected to multiple second filter holes on the inner cylinder.

[0014] The beneficial effects of this utility model are as follows: When the filter element assembly is installed in the filter cylinder, the drilling fluid flows in from the inlet pipe, passes through the first filter hole of the inner cylinder and the second filter hole of the outer cylinder, and then flows out from the outlet pipe. Impurities in the drilling fluid are intercepted and filtered in the inner cylinder. When the operator or computer determines that the filtration efficiency of the filter element assembly is lower than the set value based on the changes in the drilling fluid pressure or flow rate in the manifolds on both sides of the waste collection device, the manifolds on both sides of the waste collection device are closed. After confirming that there is no pressure in the waste collection device, the end cap is opened. The locking component can be released to pull out only the inner cylinder, replace it with a spare inner cylinder, and then close the end cap to clean the removed inner cylinder. Alternatively, the inner cylinder and outer cylinder can be rotated directly to remove them together for cleaning. During the cleaning of the inner cylinder, the outer cylinder can also partially intercept impurities in the drilling fluid, thus protecting the drilling pipeline. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the waste collection device according to an embodiment of this application.

[0016] Figure 2 This is a cross-sectional view of a waste collection device according to an embodiment of this application.

[0017] Figure 3 for Figure 2 A magnified view of part A in the diagram.

[0018] Figure 4 This is a schematic diagram of the filter element assembly according to an embodiment of this application.

[0019] Figure 5 This is a partial structural diagram of the filter element assembly according to an embodiment of this application.

[0020] The components include: 1. Filter cylinder; 11. Inlet pipe; 12. Outlet pipe; 13. End cap; 14. Connecting sleeve; 15. Flange; 16. Flange bolt; 2. Filter element assembly; 21. Inner cylinder; 211. Second filter hole of the first filter hole; 22. Outer cylinder; 221. First filter hole; 3. Plug; 31. Handle; 41. Guide block; 42. First guide groove; 43. Second guide groove; 44. Limiting groove; 5. Connecting seat; 51. Mounting sleeve; 52. Sealing ring retainer; 53. Sealing ring; 54. Spring. Detailed Implementation

[0021] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0022] This application discloses a waste collection device in a pressure-controlled drilling choke manifold, referring to... Figure 1 and Figure 2The filter includes a filter housing 1 and a filter element assembly 2 detachably installed inside the filter housing 1. One end of the filter housing 1 is connected to an inlet pipe 11, and the other end has an opening for the filter element assembly 2 to enter and exit. An end cap 13 is detachably mounted on the filter housing 1 to seal the opening. An outlet pipe 12 is connected to the outer wall of the filter housing 1. Drilling fluid enters the filter housing 1 through the inlet pipe 11, is filtered by the filter element assembly 2, and is discharged from the outlet pipe 12. In this embodiment, a flange 15 is integrally fixed to the outer wall of the filter housing 1. Both the end cap 13 and the flange 15 have through holes. The end cap 13 and the flange 15 are connected by flange bolts 16 passing through the through holes and then connected to nuts, thereby achieving a detachable connection between the end cap 13 and the filter housing 1.

[0023] Specifically, the filter element assembly 2 includes an inner cylinder 21 and an outer cylinder 22 coaxially fitted together. The outer cylinder 22 has a plurality of first filter holes 221 on its outer wall, and the inner cylinder 21 has a plurality of second filter holes on its outer wall. The diameter of the second filter holes is smaller than that of the first filter holes 221. In this embodiment, the first filter holes 221 can be strip-shaped holes. When the inner cylinder 21 is coaxially installed in the outer cylinder 22, each first filter hole 221 simultaneously connects to multiple second filter holes on the inner cylinder 21. By using first filter holes 221 with larger diameters, oil stains can be effectively prevented from adhering to and clogging the first filter holes 221. During the cleaning process of the filter assembly, the cleaning of the first filter holes 221 can be focused on, thus improving the cleaning efficiency of the filter assembly.

[0024] Reference Figure 3 and Figure 4 One end of the outer cylinder 22 is provided with a connecting seat 5, and the outer cylinder 22 is detachably connected to the inside of the filter cylinder 1 through the connecting seat 5, and the outer cylinder 22 is connected to the inlet pipe 11 through the connecting seat 5. One end of the inner cylinder 21 is detachably connected to the connecting seat 5, and when the inner cylinder 21 is connected to the connecting seat 5, the inner cylinder 21 is connected to the inlet pipe 11. The other end of the inner cylinder 21 is connected to a plug 3, and when the inner cylinder 21 is connected to the connecting seat 5, the plug 3 engages with the end of the outer cylinder 22 away from the connecting seat 5. A handle 31 is provided on the plug 3 for easy operation by the operator. A locking component is provided on the outer cylinder 22 to limit the movement of the inner cylinder 21, which can effectively limit the inner cylinder 21 when it is connected to the connecting seat 5.

[0025] Specifically, the connecting seat 5 includes a mounting sleeve 51 and a sealing sleeve assembly. The mounting sleeve 51 is coaxially fixedly connected to one end of the outer cylinder 22. The mounting sleeve 51 can be integrally formed with the outer cylinder 22, or it can be integrally fixedly connected with the outer cylinder 22 by means of welding, bonding, snap-fit, interference fit, etc. The outer wall of the mounting sleeve 51 away from the outer cylinder 22 is provided with external threads. A connecting sleeve 14 is welded and fixed on the inner wall of the filter cylinder 1. The connecting sleeve 14 and the mounting sleeve 51 can be threadedly engaged, thereby fixing the outer cylinder 22 in the filter sleeve and communicating with the inlet pipe 11.

[0026] A sealing sleeve assembly is disposed within the mounting sleeve 51. The sealing sleeve assembly is used to seal the end of the inner cylinder 21 when the inner cylinder 21 is connected to the outer cylinder. Specifically, the sealing sleeve assembly includes a sealing ring 53 retainer 52, a sealing ring 53, and a spring 54. An annular guide groove is coaxially provided on the inner wall of the mounting sleeve 51. The sealing ring 53 retainer 52 is coaxially slidably connected in the annular guide groove within the mounting sleeve 51. The sealing ring 53 is coaxially fixed to one end of the sealing ring 53 retainer 52 facing the inner cylinder 21. The spring 54 is coaxially disposed in the annular guide groove. One end of the spring 54 is fixedly connected to the mounting sleeve 51, and the other end is fixedly connected to the sealing ring 53 retainer 52. The spring 54 is used to drive the sealing ring 53 retainer 52 to move towards the inner cylinder 21. A channel for drilling fluid to pass through is coaxially provided on the sealing ring 53 retainer 52. The sealing ring 53 can be made of rubber. After the inner cylinder 21 is inserted into the outer cylinder 22, the end of the inner cylinder 21 abuts against the sealing ring 53, and under the elastic force of the spring 54, the sealing ring 53 seals against the end of the inner cylinder 21, thereby connecting the inlet pipe 11 with the inner cylinder 21.

[0027] Reference Figure 5 In this embodiment, the locking component includes a guide block 41 fixedly connected to the outer wall of the inner cylinder 21. A first guide groove 42 is provided on the inner wall of the outer cylinder 22 from the end of the outer cylinder 22 away from the connecting seat 5 along the axial direction of the outer cylinder 22. A second guide groove 43 is provided at the end of the first guide groove 42 away from its own opening and is arranged along the axial direction of the outer cylinder 22. A limiting groove 44 is provided at the end of the second guide groove 43 away from the first guide groove 42. The limiting groove 44 is provided from the side of the second guide groove 43 toward the opening of the outer cylinder 22. After the inner cylinder 21 is inserted into the outer cylinder 22, the guide block 41 is inserted into the first guide groove 42. After the guide block 41 passes through the first guide groove 42 and the second guide groove 43, the spring 54 pushes the sealing ring 53, the retainer 52 and the inner cylinder 21 to move, so that the guide block 41 is embedded in the limiting groove 44, thereby restricting the rotation and separation of the inner cylinder 21 and the outer cylinder 22.

[0028] When the waste collection device is in use, drilling fluid enters the filter cylinder 1 through the inlet pipe 11, passes through the second filter hole of the inner cylinder 21 and the first filter hole 221 of the outer cylinder 22, and is discharged from the outlet pipe 12. Pressure gauges and flow meters can be installed on the manifolds on both sides of the filter cylinder 1 to monitor the filtration effect of the filter components. When the outlet pressure decreases, the inlet pressure increases, or the outlet flow rate decreases to a set threshold, it can be confirmed that there is a blockage in the filter components that needs to be cleaned. Workers open the valves on both sides of the bypass filter section and close the valves on both sides of the filter section to be cleaned. After confirming that there is no pressure in the filter section to be cleaned, they open the end cover 13. By holding the handle 31, they push, pull, and rotate the inner cylinder 21, allowing the guide block 41 to pass through the limiting groove 44, the second guide groove 43, and the first guide groove 42. Then, the inner cylinder 21 can be pulled out from the outer cylinder 22. A spare clean inner cylinder 21 of the same model is quickly inserted, and the cover is closed. The cleaning of the inner cylinder 21 can then begin. The installation process of the inner cylinder 21 is the reverse of the disassembly process. Depending on the actual needs, the handle 31 can also be rotated directly without removing the inner cylinder 21 to rotate the outer cylinder 22 and the inner cylinder 21 synchronously, disconnecting the installation sleeve 51 from the connecting sleeve 14, thereby allowing the outer cylinder 22 and the inner cylinder 21 to be removed simultaneously for cleaning.

[0029] Those skilled in the art will understand that although preferred embodiments of the present invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if these modifications and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and modifications.

Claims

1. A waste collection device in a pressure-controlled drilling choke manifold, characterized in that: It includes a filter cylinder (1) and a filter element assembly (2) that is detachably installed inside the filter cylinder. One end of the filter cylinder (1) is connected to an inlet pipe (11), and an outlet pipe (12) is connected to the side wall of the filter cylinder (1). The filter element assembly (2) includes an inner cylinder (21) and an outer cylinder (22) coaxially sleeved. The outer cylinder (22) has several first filter holes (221) on its outer wall, and the inner cylinder (21) has several second filter holes (211) with a diameter smaller than the first filter holes (221) on its outer wall. A connecting seat (5) is provided at one end of the outer cylinder (22), and one end of the outer cylinder (22) is detachably connected to the interior of the filter cylinder (1) via the connecting seat (5). One end of the outer cylinder (22) is connected to the inlet pipe (11), and the inner cylinder (211)... The inner cylinder (21) is coaxially inserted in the outer cylinder (22). One end of the inner cylinder (21) is detachably connected to the connecting seat (5). After the inner cylinder (21) is connected to the connecting seat (5), the inner cylinder (21) is connected to the inlet pipe (11). The other end of the inner cylinder (21) is provided with a plug (3) for cooperating with the outer cylinder (22). The plug (3) is provided with a handle (31). The outer cylinder (22) is provided with a locking component for restricting the movement of the inner cylinder (21). The filter cylinder (1) is detachably provided with an end cap (13) at the end near the handle (31).

2. The waste collection device in a pressure-controlled drilling choke manifold according to claim 1, characterized in that, The connecting seat (5) includes an mounting sleeve (51) and a sealing sleeve assembly. The mounting sleeve (51) is coaxially fixedly connected to one end of the outer cylinder (22). The mounting sleeve (51) is provided with an external thread. A connecting sleeve (14) is provided on the inner wall of the filter cylinder (1) near the inlet pipe (11). The mounting sleeve (51) and the connecting sleeve (14) are threadedly connected. The sealing sleeve assembly is disposed inside the mounting sleeve (51). The sealing sleeve assembly is used to seal the end of the inner cylinder (21) when the inner cylinder (21) and the outer cylinder are connected.

3. The waste collection device in a pressure-controlled drilling choke manifold according to claim 2, characterized in that, The sealing sleeve assembly includes a sealing ring (53) retainer (52), a sealing ring (53), and a spring (54). The sealing ring (53) retainer (52) is coaxially slidably connected inside the mounting sleeve (51). The spring (54) is coaxially disposed inside the mounting sleeve (51). The spring (54) is used to drive the sealing ring (53) retainer (52) to move towards the outer cylinder (22) away from the mounting sleeve (51). The sealing ring (53) is coaxially fixed at one end of the sealing ring (53) retainer (52) near the inner cylinder (21). The sealing ring (53) is used to make sealing contact with the end of the inner cylinder (21).

4. A waste collection device in a pressure-controlled drilling choke manifold according to claim 3, characterized in that, The locking assembly includes a guide block (41) fixedly mounted on the outer wall of the inner cylinder (21). The inner wall of the outer cylinder (22) is provided with a first guide groove (42) along the axial direction of the outer cylinder (22). The first guide groove (42) is open at one end away from the connecting seat (5). The first guide groove (42) is provided with a second guide groove (43) along the axial direction of the outer cylinder (22) at one end away from its own opening. The second guide groove (43) is provided with a limiting groove (44) at one end away from the first guide groove (42). The first guide groove (42) and the second guide groove (43) allow the guide block (41) to slide within them. The limiting groove (44) is used to cooperate with the guide block (41) to restrict the rotation of the inner cylinder (21).

5. A waste collection device in a pressure-controlled drilling choke manifold according to claim 1, characterized in that, A flange (15) is fixedly installed on the outer wall of the filter cylinder (1), and the end cover (13) and the flange (15) are detachably connected by flange bolts (16).

6. A waste collection device in a pressure-controlled drilling choke manifold according to claim 1, characterized in that, The first filter hole (221) is a strip-shaped hole, and the first filter hole (221) is connected to multiple second filter holes on the inner cylinder (21).

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