An integrated completion string

Abstract

The utility model provides an integral well completion pipe column relates to well completion pipe column technical field, include: well completion pipe column body, the well completion pipe column body upper end pipe is connected with the oil pipe, the well completion pipe column body outer pipe face welds has the link block, the link block outside inserts the support plate, the support plate is fixed with the link block through the location screw post and the nut and screws, the support plate outside end is connected with the link frame through the limiting block, the link frame and the limiting block interval between the adhesion has the damping block, the link frame side end welds has the well wall fixed part, the well wall fixed part side end is connected with the support plate through the hydraulic buffer, the well completion pipe column body upper end face presses down has the sealing press plate, the sealing press plate lower end face holds the sealing inner race and sealing outer race through the ring air bag. The utility model has solved the vibration load of high pressure fluid impact in prior art well completion pipe column, is easy to cause the problem of the fixed assembly fixed unstable influence well completion pipe column stability.

Description

Technical Field

[0001] This utility model relates to the field of well completion string technology, specifically to an integrated well completion string. Background Technology

[0002] Completion tubing refers to a complete set of tubing at the wellhead, used to control the depth and pressure of oil and gas wells, and to realize oil and gas production and process operations. It is an indispensable tool in oilfield development. After searching, the existing technology (announcement number: CN202321252511.3) is an integrated well testing and completion tubing string. The text describes that "the side of the tubing string body is provided with a fixing component, which includes a connecting block. The connecting block is welded to both sides of the tubing string body, and a connecting plate is fixed on one side of the connecting block. The connecting plate is provided with mounting bolts. The fixing component can fix the tubing string to the well wall." However, in the existing technology, the vibration load generated by the high pressure fluid impact inside the completion tubing string can easily lead to the instability of the fixing component, affecting the stability of the completion tubing string. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, an integrated completion string is provided to solve the problem that vibration loads generated by high-pressure fluid impact inside the completion string can easily lead to unstable fixing of the fixing components, affecting the stability of the completion string.

[0004] To achieve the above objectives, an integrated completion string is provided, comprising: a completion string body, wherein an oil tubing is connected to the upper end of the completion string body.

[0005] The completion string body has a connecting block welded to its outer surface. A support plate is inserted into the outer side of the connecting block. The support plate is screwed and fixed to the connecting block by positioning studs and nuts. A connecting frame is connected to the outer end of the support plate by a limiting block. A damping block is bonded between the connecting frame and the limiting block. A well wall fixing component is welded to the side end of the connecting frame. The side end of the well wall fixing component is connected to the support plate by a hydraulic buffer. A sealing pressure plate is pressed down on the upper end face of the completion string body. The lower end face of the sealing pressure plate is held by an annular airbag to compress the inner sealing ring and the outer sealing ring.

[0006] Furthermore, a technical casing end is integrally welded to the middle of the completion string body, and an oil layer casing end is welded to the lower end of the technical casing end.

[0007] Furthermore, a fixed sleeve cover is welded to the upper end face of the sealing pressure plate, and a spacer ring plate is welded to the lower end face of the sealing pressure plate. Annular airbags are adhered to both the inner and outer sides of the spacer ring plate.

[0008] Furthermore, the spacer ring is provided with an inner sealing ring and an outer sealing ring on its inner and outer sides, and the inner side of the inner sealing ring is in close contact with the completion string body.

[0009] Furthermore, the upper surface of the sealing plate is provided with two sets of inflation ports, and the lower ends of the inflation ports are connected to the air nozzles of the annular airbags via air pipes.

[0010] Furthermore, the connecting blocks are welded in a triangular distribution on the outer surface of the completion string body, and a positioning stud runs through the inner side of the connecting blocks, with a screw threaded onto the surface of the positioning stud.

[0011] Furthermore, the hydraulic buffers are symmetrically distributed at the outer ends of the connecting frame, and the support plate has positioning studs welded to its insertion slot surface.

[0012] The beneficial effects of this utility model are as follows: the integrated completion string of this utility model utilizes wellbore fixing components, hydraulic buffers, damping blocks, support plates, and limiting blocks to form a buffer-type fixing structure. The connecting blocks on the outer surface of the completion string are inserted and fixed to the support plate, so that the triangularly distributed hydraulic buffers and damping blocks absorb and buffer the vibration load generated by the integrated completion string. This effectively reduces the vibration transmission caused by fluid impact within the integrated completion string, enhances the in-well fixing effect of the integrated completion string, ensures that the integrated completion string is more firmly fixed in the wellbore, guarantees the normal operation of oil and gas production, and improves the stability of the integrated completion string. Attached Figure Description

[0013] Figure 1 This is a front view cross-sectional structural diagram of the integrated well completion string according to an embodiment of the present utility model.

[0014] Figure 2 This is a partial cross-sectional view of the integrated well completion string according to an embodiment of the present invention.

[0015] Figure 3 This is a top view schematic diagram of the connection structure of the completion string and well wall fixing component according to an embodiment of the present utility model.

[0016] Figure 4 This is a cross-sectional structural diagram of the sealing pressure plate according to an embodiment of the present utility model.

[0017] In the diagram: 1. Completion string body; 11. Connecting block; 12. Tubing; 13. Technical casing end; 14. Oil layer casing end; 2. Wellbore fixing component; 21. Hydraulic buffer; 22. Damping block; 23. Connecting frame; 3. Sealing pressure plate; 31. Fixing sleeve cap; 32. Sealing inner ring; 33. Annular airbag; 34. Air inlet; 35. Air pipe; 36. Sealing outer ring; 37. Spacer ring plate; 4. Support plate; 41. Limiting block; 42. Positioning stud; 43. Nut. Detailed Implementation

[0018] Reference Figures 1 to 4As shown, this utility model provides an integrated completion string, including: a completion string body 1, with an oil tubing 12 connected inside the upper end of the completion string body 1.

[0019] A connecting block 11 is welded to the outer surface of the completion string body 1. A support plate 4 is inserted into the outer side of the connecting block 11. The support plate 4 is screwed and fixed to the connecting block 11 by a positioning stud 42 and a nut 43. A connecting frame 23 is connected to the outer end of the support plate 4 by a limiting block 41. A damping block 22 is bonded between the connecting frame 23 and the limiting block 41. A well wall fixing component 2 is welded to the side end of the connecting frame 23. The side end of the well wall fixing component 2 is connected to the support plate 4 by a hydraulic buffer 21. A sealing pressure plate 3 is pressed down on the upper end surface of the completion string body 1. The lower end surface of the sealing pressure plate 3 is pressed and held by an annular airbag 33 to hold the inner sealing ring 32 and the outer sealing ring 36.

[0020] The completion string body 1 is installed and fixed inside the well. A buffer-type fixing structure is formed by the well wall fixing component 2, hydraulic buffer 21, damping block 22, support plate 4 and limiting block 41. The connecting block 11 on the outer pipe surface of the completion string body 1 is inserted and fixed to the support plate 4. The triangularly distributed hydraulic buffer 21 and damping block 22 absorb and buffer the vibration load generated by the integrated completion string, effectively reducing the vibration transmission caused by fluid impact inside the integrated completion string. This ensures that the integrated completion string is more firmly fixed in the well wall, guarantees the normal operation of oil and gas production, and improves the stability of the integrated completion string.

[0021] In this embodiment, a technical casing end 13 is integrally welded to the middle of the completion string body 1, and an oil layer casing end 14 is welded to the lower end of the technical casing end 13.

[0022] In a preferred embodiment, the completion string body 1 is constructed from multiple integrally connected components. The technical casing end 13 is used to isolate pressure differences and oil, gas, and water layers between different formations, preventing mutual interference and contamination of formation fluids. The oil layer casing end 14 is the lowest part of the completion string body 1, directly connected to the underground oil layer, and is a key part of oil extraction. The oil layer casing end 14 contains a production casing to guide oil from the underground oil layer into the wellhead.

[0023] In this embodiment, a fixing sleeve 31 is welded to the upper end face of the sealing pressure plate 3, and a spacer ring plate 37 is welded to the lower end face of the sealing pressure plate 3. Annular airbags 33 are bonded to both the inner and outer sides of the spacer ring plate 37. An inner sealing ring 32 and an outer sealing ring 36 are provided on the inner and outer sides of the spacer ring plate 37, with the inner side of the inner sealing ring 32 in close contact with the completion tubing body 1. Two sets of air inlets 34 are provided on the upper surface of the sealing pressure plate 3, and the lower ends of the air inlets 34 are connected to the air nozzles of the annular airbags 33 via air pipes 35.

[0024] In a preferred embodiment, the sealing pressure plate 3 is fixed to the upper wellhead surface via a fixed sleeve 31. By inflating the annular airbag 33 at the lower end of the sealing pressure plate 3, the annular airbag 33 expands and compresses the inner sealing ring 32 and the outer sealing ring 36, causing the inner sealing ring 32 and the outer sealing ring 36 to adhere tightly to the pipe surface of the completion string body 1 and the well wall surface, respectively, thereby achieving a sealing effect and preventing the leakage of oil and gas in the well.

[0025] In this embodiment, the connecting blocks 11 are welded in a triangular distribution on the outer surface of the completion tubing body 1. A positioning stud 42 penetrates the inner side of the connecting blocks 11, and a nut 43 is screwed onto the surface of the positioning stud 42. The hydraulic buffers 21 are symmetrically distributed at the outer end of the connecting frame 23, and the positioning studs 42 are welded to the insertion groove surface of the support plate 4.

[0026] As a preferred implementation, the completion string body 1 and the well wall fixing component 2 are connected by a triangularly distributed support plate 4, hydraulic buffer 21 and damping block 22, which absorb and buffer the vibration load generated by the completion string body 1, effectively reduce the vibration transmission caused by fluid impact in the completion string body 1, enhance the well wall fixing effect of the completion string body 1, and ensure that the completion string body 1 is more firmly fixed in the well wall.

[0027] This utility model's integrated completion string effectively solves the problem in existing technologies where vibration loads generated by high-pressure fluid impact within the completion string can easily lead to unstable fixing of the fixing components, affecting the stability of the completion string. It effectively reduces the vibration transmission caused by fluid impact within the integrated completion string, enhances the in-well fixing effect of the integrated completion string, ensures that the integrated completion string is more firmly fixed in the well wall, guarantees the normal operation of oil and gas production, and improves the stability of the integrated completion string. It is suitable for integrated completion strings.

Claims

1. An integrated well completion string, comprising: The completion string body (1), wherein an oil pipe (12) is connected inside the upper end of the completion string body (1), characterized in that: The completion string body (1) has a connecting block (11) welded to its outer surface. A support plate (4) is inserted into the outer side of the connecting block (11). The support plate (4) is screwed to the connecting block (11) by a positioning stud (42) and a nut (43). A connecting frame (23) is connected to the outer end of the support plate (4) by a limiting block (41). A damping block (22) is bonded between the connecting frame (23) and the limiting block (41). A well wall fixing component (2) is welded to the side end of the connecting frame (23). The support plate (4) is connected to the side end of the well wall fixing component (2) by a hydraulic buffer (21). A sealing pressure plate (3) is pressed down on the upper end surface of the completion string body (1). The sealing pressure plate (3) is pressed down on the lower end surface of the sealing plate (3) by an annular airbag (33) to hold the sealing inner ring (32) and the sealing outer ring (36).

2. The integrated well completion string according to claim 1, characterized in that, The completion string body (1) is integrally welded with a technical casing end (13) in the middle, and an oil layer casing end (14) is welded to the lower end of the technical casing end (13).

3. The integrated well completion string according to claim 1, characterized in that, A fixed cover (31) is welded to the upper end face of the sealing pressure plate (3), and a spacer ring plate (37) is welded to the lower end face of the sealing pressure plate (3). Annular airbags (33) are bonded to both the inner and outer sides of the spacer ring plate (37).

4. The integrated well completion string according to claim 3, characterized in that, The spacer ring (37) is provided with a sealing inner ring (32) and a sealing outer ring (36) on its inner and outer sides. The inner side of the sealing inner ring (32) is in close contact with the completion string body (1).

5. The integrated well completion string according to claim 1, characterized in that, The upper surface of the sealing plate (3) is provided with two sets of inflation ports (34), and the lower end of the inflation ports (34) is connected to the air nozzle of the annular airbag (33) through the air pipe (35).

6. The integrated well completion string according to claim 1, characterized in that, The connecting blocks (11) are welded in a triangular distribution on the outer surface of the completion string body (1). A positioning stud (42) runs through the inner side of the connecting blocks (11), and a nut (43) is screwed onto the surface of the positioning stud (42).

7. The integrated well completion string according to claim 1, characterized in that, The hydraulic buffer (21) is symmetrically distributed at the outer end of the connecting frame (23), and the support plate (4) has a positioning stud (42) welded to the insertion groove surface.

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