Drilling and completion integrated tool

Abstract

The utility model discloses a drilling and completion integrated tool which comprises a screen pipe sliding sleeve and a high-strength releasing tool. The screen pipe sliding sleeve comprises an upper shell, a first radial through hole is formed in the upper end of the upper shell, a first shear pin hole is formed in the middle end of the upper shell, the lower end of an inner cavity of the upper shell is in threaded connection with a lower connector, and an inner sliding sleeve is fixedly installed at the upper end of the inner cavity of the upper shell. And a first shear pin is fixedly mounted between the lower end of the outer surface of the inner sliding sleeve and the surface of the first shear pin hole. Under the action of the high-strength releasing tool and the multi-stage screen pipe sliding sleeve, the multi-stage screen pipe sliding sleeve can be connected with a drill rod, meanwhile, personnel can activate the mining section of the drilling and completion integrated tool stage by stage in a graded head ball mode, the operation procedure of drilling and completion is greatly simplified, and in the whole process from well drilling to well completion oil extraction, the working efficiency is greatly improved. And the operation procedures of pulling out, salvaging, lining pipe feeding, connecting oil feeding, perforating and the like are omitted.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology, specifically to an integrated drilling and completion tool. Background Technology

[0002] In major oilfield blocks in Xinjiang, such as the Northwest Oilfield and Tarim Oilfield, most wells are ultra-deep. For example, in the Shunbei block, the well depth exceeds 8,000 meters. The high temperature and pressure make drilling difficult and risky. Especially when approaching the designed well depth, the formation is unstable, which can easily lead to wellbore collapse and stuck drill bit accidents, and the subsequent handling is also very difficult.

[0003] Currently, the conventional approach is as follows: if drilling can be completed smoothly, a liner is first run to support the wellbore, followed by the running oil and perforation guns. After perforation, the drill string is pulled out to enter the well completion and production stage. If drilling fails to be completed smoothly and the drill string becomes stuck near the target formation, the lower drill string is dropped into the well after the splinter is loosened, and the running oil and perforation guns are run out to enter the well completion and production stage. This drilling and completion process requires multiple trips and runs, as well as running oil and perforation guns, which consumes a lot of time and costs. Furthermore, drilling and well completion and production cannot be organically connected, as they are handled separately by the drilling company and the oilfield completion and testing company, requiring the allocation of resources from multiple parties.

[0004] To address the aforementioned problems, this utility model provides an integrated drilling and completion tool. Utility Model Content

[0005] The purpose of this utility model is to provide an integrated drilling and completion tool that reduces tripping and drilling operations and the need for connecting oil perforations, thereby reducing construction difficulty and lowering drilling and completion costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated drilling and completion tool, comprising: a screen sleeve and a high-strength release mechanism;

[0007] The screen tube sleeve includes an upper shell, a first radial through hole at the upper end of the upper shell, a first shear pin hole at the middle end of the upper shell, a lower connector threaded to the lower end of the inner cavity of the upper shell, an inner sleeve fixedly installed at the upper end of the inner cavity of the upper shell, a first shear pin fixedly installed between the lower end of the outer surface of the inner sleeve and the surface of the first shear pin hole, and a ball seat threaded to the lower end of the inner cavity of the inner sleeve.

[0008] The high-strength release mechanism includes a lower body, an upper body at the upper end of the inner cavity of the lower body, an upper connector threaded to the upper end of the inner cavity of the upper body, second radial through holes on both sides of the upper body, a second shear pin hole at the upper end of the upper body and below the second radial through holes, a support shaft fixedly installed at the middle end of the inner cavity of the upper body, and a second shear pin fixedly installed between the outer surface of the support shaft and the surface of the second shear pin hole.

[0009] As a preferred embodiment, the inner sliding sleeve is a circular elongated tube. A first sealing surface is provided between the upper end of the outer surface of the inner sliding sleeve and the upper end of the inner cavity of the upper housing and above the first radial through hole. A second sealing surface is provided between the lower end of the outer surface of the inner sliding sleeve and the inner cavity of the upper housing and below the first shear pin hole.

[0010] As a preferred embodiment, the upper end of the ball seat cavity is provided with a first conical inner hole, the lower end of the ball seat is provided with a first pawl structure, the lower end of the first pawl structure is provided with an inverted conical step, and the upper end of the first pawl structure is provided with a first circumferential groove.

[0011] As a preferred embodiment, the top of the lower connector is provided with a first toothed groove, and the upper end of the inner cavity of the lower connector is provided with an inverted conical groove.

[0012] As a preferred embodiment, the number of the first radial through holes is 40, and the diameter of the first radial through holes is 9 mm.

[0013] As a preferred embodiment, a third sealing surface is provided between the upper end of the outer surface of the support shaft and the upper end of the inner cavity of the upper body and above the second radial through hole, and a fourth sealing surface is provided between the upper end of the outer surface of the support shaft and the upper end of the inner cavity of the upper body and below the second shear pin hole.

[0014] As a preferred embodiment, the upper body has an inner stepped surface at the middle of its inner cavity, a first outer stepped surface at the lower end of its outer surface, a second circumferential groove at the lower end of its outer surface and above the first outer stepped surface, a second pawl structure at the lower end of its upper body and below the first outer stepped surface, a small protrusion at the lower end of the second pawl structure, a second toothed slot at the top of its lower body, and a small groove in its inner cavity.

[0015] As a preferred embodiment, the surface of the second circumferential groove engages with the surface of the second toothed slot, and the surface of the small protrusion engages with the surface of the small groove.

[0016] As a preferred embodiment, the upper end of the inner cavity of the support shaft is provided with a second conical inner hole, the upper end of the outer surface of the support shaft is provided with a second outer stepped surface, and the lower end of the outer surface of the support shaft is provided with a flange.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This utility model, through the action of high-strength release and multi-stage screen sleeve, can connect with the drill pipe while personnel can use a staged ball head method to activate the mining section of this integrated drilling and completion tool step by step, greatly simplifying the drilling and completion operation procedures. From drilling to completion and oil production, it eliminates the need for operations such as tripping, fishing, running liners, running oil connections, and perforation, greatly saving mining costs and improving mining efficiency. Attached Figure Description

[0019] Figure 1 This is a main cross-sectional view of the integrated drilling and completion tool of this utility model;

[0020] Figure 2 This is a schematic diagram of the ball seat structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the lower connector structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the upper body structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the lower body structure of this utility model;

[0024] Figure 6 This is a main cross-sectional view of the support shaft of this utility model;

[0025] Figure 7 This is a diagram showing the overall drill string connection of the integrated drilling and completion tool of this utility model.

[0026] In the figure: 1. Upper shell; 2. Lower connector; 21. First toothed slot; 22. Inverted conical groove; 3. Internal sliding sleeve; 4. Ball seat; 41. First conical inner hole; 42. First circumferential groove; 43. First pawl structure; 44. Inverted conical step; 5. First shear pin; 6. Upper connector; 7. Upper body; 71. Inner step surface; 72. First outer step surface; 73. Second circumferential groove; 74. Second pawl structure; 7 5. Small protrusion; 8. Lower body; 81. Second toothed groove; 82. Small groove; 9. Support shaft; 91. Second conical inner hole; 92. Second outer stepped surface; 93. Flange; 10. Second shear pin; H1. First radial through hole; H2. First shear pin hole; H3. Second radial through hole; H4. Second shear pin hole; S1. First sealing surface; S2. Second sealing surface; S3. Third sealing surface; S4. Fourth sealing surface. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] Example 1:

[0030] Please see Figures 1-7 As shown, this utility model provides an integrated drilling and completion tool, including: a screen sleeve and a high-strength release mechanism;

[0031] The screen tube sleeve includes an upper housing 1, with a first radial through hole H1 at the upper end of the upper housing 1, a first shear pin hole H2 at the middle end of the upper housing 1, a lower connector 2 threadedly connected to the lower end of the inner cavity of the upper housing 1, an inner sleeve 3 fixedly installed at the upper end of the inner cavity of the upper housing 1, a first shear pin 5 fixedly installed between the lower end of the outer surface of the inner sleeve 3 and the surface of the first shear pin hole H2, and a ball seat 4 threadedly connected to the lower end of the inner cavity of the inner sleeve 3.

[0032] The high-strength release mechanism includes a lower body 8, an upper body 7 at the upper end of the inner cavity of the lower body 8, an upper connector 6 threadedly connected to the upper end of the inner cavity of the upper body 7, second radial through holes H3 on both sides of the upper body 7, a second shear pin hole H4 at the upper end of the upper body 7 and below the second radial through holes H3, a support shaft 9 fixedly installed at the middle end of the inner cavity of the upper body 7, and a second shear pin 10 fixedly installed between the outer surface of the support shaft 9 and the surface of the second shear pin hole H4.

[0033] In this technical solution, the high-strength release mechanism and multi-stage screen sleeve allow for connection with the drill pipe. Simultaneously, personnel can use a staged ball joint to activate the production section of this integrated drilling and completion tool step by step, greatly simplifying the drilling and completion operation procedures. From drilling to completion and oil production, the entire process eliminates operations such as tripping, fishing, running liners, running oil connections, and perforation, significantly saving production costs and improving production efficiency.

[0034] Example 2:

[0035] Based on Embodiment 1, this utility model is as follows: Figures 1-3As shown, the inner sliding sleeve 3 is a circular elongated tube. A first sealing surface S1 is provided between the upper end of the outer surface of the inner sliding sleeve 3 and the upper end of the inner cavity of the upper housing 1, and above the first radial through hole H1. A second sealing surface S2 is provided between the lower end of the outer surface of the inner sliding sleeve 3 and the inner cavity of the upper housing 1, and below the first shear pin hole H2. A first conical inner hole 41 is provided at the upper end of the inner cavity of the ball seat 4. A first pawl structure 43 is provided at the lower end of the ball seat 4. An inverted conical step 44 is provided at the lower end of the first pawl structure 43. A first circumferential groove 42 is provided at the upper end of the first pawl structure 43. A first toothed groove 21 is provided at the top of the lower connector 2. An inverted conical groove 22 is provided at the upper end of the inner cavity of the lower connector 2. The number of first radial through holes H1 is 40, and the diameter of the first radial through holes H1 is 9 mm.

[0036] Example 3:

[0037] Based on Embodiment 1, this utility model is as follows: Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a third sealing surface S3 is provided between the upper end of the outer surface of the support shaft 9 and the upper end of the inner cavity of the upper body 7, and above the second radial through hole H3. A fourth sealing surface S4 is provided between the upper end of the outer surface of the support shaft 9 and the upper end of the inner cavity of the upper body 7, and below the second shear pin hole H4. An inner stepped surface 71 is provided at the middle of the inner cavity of the upper body 7. A first outer stepped surface 72 is provided at the lower end of the outer surface of the upper body 7. A second circumferential groove 73 is provided at the lower end of the outer surface of the upper body 7, and above the first outer stepped surface 72. A second pawl structure 74 is provided below the first outer step surface 72. A small protrusion 75 is provided at the lower end of the second pawl structure 74. A second toothed groove 81 is provided at the top of the lower body 8. A small groove 82 is provided in the inner cavity of the lower body 8. The surface of the second circumferential groove 73 engages with the surface of the second toothed groove 81. The surface of the small protrusion 75 engages with the surface of the small groove 82. A second conical inner hole 91 is provided at the upper end of the inner cavity of the support shaft 9. A second outer step surface 92 is provided at the upper end of the outer surface of the support shaft 9. A flange 93 is provided at the lower end of the outer surface of the support shaft 9.

[0038] The specific working principle is as follows:

[0039] This integrated drilling and completion tool features multi-stage screen sleeves and high-strength release mechanisms, designed and installed at different positions on the drill string according to the drill string assembly, such as... Figure 1The diagram shows the overall drill string connection of the integrated drilling and completion tool. (It should be noted that when the screen sleeve is installed on the drill string in a multi-stage configuration, the first conical inner hole 41 on the selected ball seat 4 needs to be progressively enlarged from bottom to top, i.e., the inner hole d of the ball seat 4 of the first-stage screen sleeve is the smallest, the second stage is next, and the third stage is the largest.) When drilling reaches the target layer and can be completed smoothly, or when a stuck pipe accident occurs during drilling, and the multi-stage screen sleeve is located near the oil layer, and well completion and oil production operations can be carried out directly, in this case, the starting ball of the first-stage screen sleeve is pumped in from the surface. The diameter of the ball is slightly larger than the orifice diameter d of the ball seat 4 of the first-stage screen tube sliding sleeve, but smaller than the orifice diameter d of the ball seat 4 of the second and third-stage screen tube sliding sleeves. The ball can pass smoothly through the upper drill string and be seated on the ball seat 4 of the first-stage screen tube sliding sleeve. Mud is continuously pumped in for pressurization. When the pressure rises to the set value, the first shear pin 5 breaks. Under the impact of the high-pressure mud, the inner sliding sleeve 3 and the ball seat 4 move downward together until the ball seat 4 is stuck in the inverted conical groove 22 of the lower connector 2. During this process, the first pawl structure 43 of the ball seat 4 will undergo elastic deformation, and the inverted conical step 44 will contract inward and be stuck in the lower connector. After the ball seat 4 is inserted into the inverted conical groove 22 of the lower connector 2, the first pawl structure 43 of the ball seat 4 springs back to its original position. This confines the ball seat 4 within the inverted conical groove 22 of the lower connector 2, preventing it from moving upwards out of the groove. Consequently, the first radial through-hole H1 of the upper housing 1 is fully exposed, allowing for internal and external communication of the tool and opening the circulation channel. The pump pressure monitored on the ground drops significantly, indicating successful activation of the first-stage screen sleeve. Correspondingly, formation oil and gas can also enter the tool through the first radial through-hole H1, forming a smooth oil production channel. Simultaneously, the first toothed clamp of the lower connector 2... The slot 21 engages with the first circumferential groove 42 of the ball seat 4 to prevent the internal sliding sleeve 3 and the ball seat 4 from rotating. Similarly, the ball can continue to be thrown to activate the second and third stage screen tube sliding sleeves respectively, so as to expand the oil production channel of different well sections. Since the internal sliding sleeve 3 and the ball seat 4 cannot move upward to exit the inverted conical groove 22, the upward movement of crude oil during the oil production process cannot drive the internal sliding sleeve 3 upward to block the first radial through hole H1 of the upper shell 1 again, thereby avoiding the risk of the oil production channel being blocked. At the same time, the starting ball is preferably made of soluble magnesium-aluminum alloy to prevent the starting ball from blocking the oil production channel.After all the multi-stage screen sleeves are activated, the high-strength release ball is inserted. The ball is sealed at the second conical inner hole 91 at the upper end of the support shaft 9. Pressure is increased and the second shear pin 10 is cut in the same manner. The second outer step surface 92 of the support shaft 9 descends to the inner step surface 71 of the upper body 7. Thus, the flange 93 at its lower end disengages from the inner wall of the second pawl structure 74 of the upper body 7. The second pawl structure 74 loses its internal support, and the support shaft 9 slides below the second radial through hole H3 of the upper body 7. The second radial through hole H3 opens, the mud circulation channel opens, and the pump pressure monitored on the surface drops significantly. At this time, the drill string is lifted, and the second pawl structure 74 of the upper body 7 slides out of the small groove 82 of the lower body 8. The upper body 7 and the entire drill string above it can then be pulled out of the wellbore. The tubing is then lowered and connected to the lower body 8, after which oil production operations can begin.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A drilling and completion integrated tool, characterized in that, include: Screen tube sliding sleeve, high-strength release mechanism; The screen tube sleeve includes an upper shell (1), the upper end of which is provided with a first radial through hole (H1), the middle end of which is provided with a first shear pin hole (H2), the lower end of the inner cavity of the upper shell (1) is threaded with a lower connector (2), the upper end of the inner cavity of the upper shell (1) is fixedly installed with an inner sleeve (3), the lower end of the outer surface of the inner sleeve (3) is fixedly installed with a first shear pin (5) between the lower end of the outer surface of the inner sleeve (3) and the surface of the first shear pin hole (H2), and the lower end of the inner cavity of the inner sleeve (3) is threaded with a ball seat (4). The high-strength release mechanism includes a lower body (8), an upper body (7) is provided at the upper end of the inner cavity of the lower body (8), an upper connector (6) is threaded to the upper end of the inner cavity of the upper body (7), a second radial through hole (H3) is provided at the upper end of both sides of the upper body (7), a second shear pin hole (H4) is provided at the upper end of the upper body (7) and below the second radial through hole (H3), a support shaft (9) is fixedly installed at the middle end of the inner cavity of the upper body (7), and a second shear pin (10) is fixedly installed between the outer surface of the support shaft (9) and the surface of the second shear pin hole (H4).

2. The drilling and completion integrated tool according to claim 1, characterized in that: The inner sliding sleeve (3) is a circular long tube. A first sealing surface (S1) is provided between the upper end of the outer surface of the inner sliding sleeve (3) and the upper end of the inner cavity of the upper housing (1) and above the first radial through hole (H1). A second sealing surface (S2) is provided between the lower end of the outer surface of the inner sliding sleeve (3) and the inner cavity of the upper housing (1) and below the first shear pin hole (H2).

3. The drilling and completion integrated tool according to claim 1, characterized in that: The upper end of the inner cavity of the ball seat (4) is provided with a first conical inner hole (41), the lower end of the ball seat (4) is provided with a first pawl structure (43), the lower end of the first pawl structure (43) is provided with an inverted conical step (44), and the upper end of the first pawl structure (43) is provided with a first circumferential groove (42).

4. The drilling and completion integrated tool according to claim 1, characterized in that: The top of the lower connector (2) is provided with a first tooth-clamping groove (21), and the upper end of the inner cavity of the lower connector (2) is provided with an inverted conical groove (22).

5. The drilling and completion integrated tool according to claim 1, characterized in that: The number of the first radial through holes (H1) is 40, and the diameter of the first radial through holes (H1) is 9 mm.

6. The drilling and completion integrated tool according to claim 1, characterized in that: A third sealing surface (S3) is provided between the upper end of the outer surface of the support shaft (9) and the upper end of the inner cavity of the upper body (7) and above the second radial through hole (H3). A fourth sealing surface (S4) is provided between the upper end of the outer surface of the support shaft (9) and the upper end of the inner cavity of the upper body (7) and below the second shear pin hole (H4).

7. The drilling and completion integrated tool according to claim 1, characterized in that: The upper body (7) has an inner stepped surface (71) at the middle of its inner cavity, a first outer stepped surface (72) at the lower end of its outer surface, a second circumferential groove (73) at the lower end of its outer surface and above the first outer stepped surface (72), a second pawl structure (74) at the lower end of its outer surface and below the first outer stepped surface (72), a small protrusion (75) at the lower end of the second pawl structure (74), a second toothed slot (81) at the top of its lower body (8), and a small groove (82) in its inner cavity.

8. The drilling and completion integrated tool according to claim 7, characterized in that: The surface of the second circumferential groove (73) engages with the surface of the second toothed slot (81), and the surface of the small protrusion (75) engages with the surface of the small groove (82).

9. The drilling and completion integrated tool according to claim 1, characterized in that: The upper end of the inner cavity of the support shaft (9) is provided with a second conical inner hole (91), the upper end of the outer surface of the support shaft (9) is provided with a second outer step surface (92), and the lower end of the outer surface of the support shaft (9) is provided with a flange (93).

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