Casing running circulation tool for top drive

Abstract

The utility model discloses a lower casing circulation tool for a top drive. The lower casing circulation tool comprises an oil cylinder assembly, an oil cylinder upper protection buckle connector and an oil cylinder lower protection buckle connector. The oil cylinder assembly is connected with the top drive connecting assembly through the oil cylinder upper protection buckle connector, and the external top drive component is connected with the oil cylinder assembly through the top drive connecting assembly. The oil cylinder assembly is connected with the inner circulation sealing head assembly at the lower end through an oil cylinder lower protection buckle connector, and a sealing pressing cap assembly is arranged between the inner circulation sealing head assembly and the oil cylinder lower protection buckle connector. The inner circulation sealing head assembly extends into the casing pipe in the axial direction of the casing pipe, and the sealing pressing cap assembly is connected with a casing pipe coupling which is arranged outside the casing pipe and makes contact with the outer wall of the casing pipe. According to the circulation tool, the inner circulation sealing head assembly and the sealing pressing cap assembly are arranged at the lower end of the oil cylinder assembly, the hydraulic cylinder is controlled to stretch out through the control panel, the sealing effect is achieved in the mode that outer seal oil pressure assists sealing and inner seal achieves pressure expansion sealing through pressure, and it can be guaranteed that casing running operation is smoothly completed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to a casing running circulation tool for a top drive. Background Art

[0002] During the process of casing running by a rig equipped with a top drive, safety grouting and casing running resistance in the previous casing running process are problems that need to be considered key. In the current construction, the installation time of the accident joint is long, resulting in the phenomenon of casing jamming, and it cannot be smoothly run to the designated position, and even the problem of wellbore abandonment may occur.

[0003] Therefore, based on the above technical problems, those skilled in the art urgently need to develop a casing running circulation tool for a top drive. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a casing running circulation tool for a top drive. An inner circulation seal head assembly and a seal gland assembly are arranged at the lower end of the oil cylinder assembly. By controlling the extension of the hydraulic cylinder through a control panel, the sealing effect is achieved by means of external seal oil pressure assistance sealing and internal seal pressure inflation sealing, which can ensure the smooth completion of the casing running operation.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A casing running circulation tool for a top drive of the utility model, the tool includes:

[0007] An oil cylinder assembly;

[0008] An upper oil cylinder retaining ring joint arranged at the upper end of the oil cylinder assembly and a lower oil cylinder retaining ring joint arranged at the lower end of the oil cylinder assembly;

[0009] The oil cylinder assembly is connected to a top drive connection component through the upper oil cylinder retaining ring joint, and an external top drive component is connected to the oil cylinder assembly through the top drive connection component;

[0010] The oil cylinder assembly is connected to the lower-end inner circulation seal head assembly through the lower oil cylinder retaining ring joint, and a seal gland assembly is arranged between the inner circulation seal head assembly and the lower oil cylinder retaining ring joint;

[0011] The inner circulation seal head assembly extends axially into the casing along the casing, and the seal gland assembly is connected to a casing collar placed outside the casing and contacting the outer wall of the casing.

[0012] Further, the top drive connection component includes:

[0013] An adjustable joint connected to the upper oil cylinder retaining ring joint; and

[0014] A variable thread adapter disposed at one end of the stroke adjustment adapter away from the oil cylinder assembly;

[0015] The variable thread adapter and the stroke adjustment adapter are connected by a universal joint;

[0016] The variable thread adapter is used to connect an external top drive component, and the universal joint is used to adjust the angles of the oil cylinder assembly and the inner circulation seal head assembly at the front end so as to drive the inner circulation seal head assembly to be coaxial with the casing;

[0017] The stroke adjustment adapter adjusts its own length by means of threads.

[0018] Further, a movable mud guard is provided between the upper retaining buckle adapter of the oil cylinder and the stroke adjustment adapter.

[0019] Further, one end of the lower retaining buckle adapter of the oil cylinder is connected to the oil cylinder assembly, and the other end of the lower retaining buckle adapter of the oil cylinder extends into the inside of the seal gland assembly and is connected to the inner circulation seal head assembly.

[0020] Further, the seal gland assembly includes:

[0021] A first seal gland structure and a second seal gland structure;

[0022] The first seal gland structure is connected to one end of the second seal gland structure close to the lower retaining buckle adapter of the oil cylinder;

[0023] The casing coupling is provided inside the second seal gland structure, and the end of the casing coupling extends to the first seal gland structure. A thickened gasket is provided between the casing coupling and the first seal gland structure;

[0024] A lip seal ring is provided between the casing coupling and the second seal gland structure;

[0025] One end of the casing coupling away from the seal gland assembly is sleeved outside the casing.

[0026] Further, the inner circulation seal head assembly includes:

[0027] An inner circulation head extending into the casing; and

[0028] An inner circulation head shaft rod connected axially to the inner circulation head, and the other end of the inner circulation head shaft rod is connected to the lower retaining buckle adapter of the oil cylinder;

[0029] A lip seal sleeve is provided outside the inner circulation head shaft rod close to the inner circulation head, and the lip seal sleeve contacts the inner wall of the casing.

[0030] In the above technical solution, a casing running circulation tool for top drive provided by the utility model has the following beneficial effects:

[0031] For the circulation tool of the utility model, an internal circulation seal head assembly and a seal gland assembly are arranged at the lower end of the oil cylinder assembly. The hydraulic cylinder is controlled to extend through the control panel, and the sealing effect is achieved by the external sealing oil pressure assistance sealing and the internal sealing pressure expansion sealing method, which can ensure the smooth completion of the casing running operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0033] Figure 1 It is a schematic structural view of the casing running circulation tool for top drive disclosed in the embodiment of the present application;

[0034] Figure 2 It is a schematic structural view of the sealing part of the casing running circulation tool for top drive disclosed in the embodiment of the present application;

[0035] Figure 3 It is a schematic structural view of the reducer sub of the casing running circulation tool for top drive disclosed in the embodiment of the present application.

[0036] DESCRIPTION OF THE REFERENCE NUMERALS:

[0037] 1, reducer sub; 2, universal joint; 3, adjustable joint; 4, movable mud bucket; 5, upper retaining ring joint of the oil cylinder; 6, oil cylinder assembly; 7, lower retaining ring joint of the oil cylinder; 8, seal gland assembly; 9, internal circulation seal assembly;

[0038] 901, internal circulation head; 902, casing collar; 903, lip seal sleeve; 904, lip seal ring; 905, thickened gasket; 906, locking nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] In order to enable those skilled in the art to better understand the technical solutions of the utility model, the following will further introduce the utility model in detail with reference to the drawings.

[0040] Refer to Figures 1 to 3 as shown;

[0041] This embodiment discloses a casing running circulation tool for top drive, and the tool includes:

[0042] oil cylinder assembly 6;

[0043] The upper guard buckle joint 7 of the oil cylinder assembly 6 arranged at the upper end of the oil cylinder assembly 6 and the lower guard buckle joint 7 of the oil cylinder assembly 6 arranged at the lower end of the oil cylinder assembly 6;

[0044] The oil cylinder assembly 6 is connected to the top drive connection assembly through the upper guard buckle joint 5 of the oil cylinder, and the external top drive component is connected to the oil cylinder assembly 6 through the top drive connection assembly;

[0045] The oil cylinder assembly 6 is connected to the inner circulation seal head assembly 9 at the lower end through the lower guard buckle joint 7 of the oil cylinder, and a seal compression nut assembly 8 is arranged between the inner circulation seal head assembly 9 and the lower guard buckle joint 7 of the oil cylinder;

[0046] The inner circulation seal head assembly 9 extends axially into the casing 11 along the casing 11, and the seal compression nut assembly 8 is connected with a casing collar 902 placed outside the casing 11 and contacting the outer wall of the casing 11.

[0047] Specifically, this embodiment discloses a circulation tool that can quickly establish circulation during the process of running casing by a top drive drilling construction team and reduce the complexity rate of downhole accidents; it includes an oil cylinder assembly 6, a top drive connection assembly, an inner circulation seal head assembly 9 and a seal compression nut assembly 8; among them, the upper end of the oil cylinder assembly 6 is connected to the top drive connection assembly through the upper guard buckle joint 5 of the oil cylinder, so as to connect the external top drive component; the lower end of the oil cylinder assembly 6 is connected to the inner circulation seal head assembly 9 and the seal compression nut assembly 8 through the lower guard buckle joint 7 of the oil cylinder. Among them, the inner circulation seal head assembly 9 of this embodiment extends into the casing 11 for casing running operation, while the seal compression nut assembly 8 is placed outside the casing 11 and abuts against the outer wall of the casing 11 through the casing collar 902.

[0048] Preferably, the top drive connection assembly of this embodiment includes:

[0049] An adjustment joint 3 connected to the upper guard buckle joint 5 of the oil cylinder; and

[0050] A reducer joint 1 arranged at one end of the adjustment joint 3 far from the oil cylinder assembly 6;

[0051] The reducer joint 1 and the adjustment joint 3 are connected through a universal joint 2;

[0052] The reducer joint 1 is used to connect the external top drive component, and the universal joint 2 is used to adjust the angle of the oil cylinder assembly 6 and the front-end inner circulation seal head assembly 9 to drive the inner circulation seal head assembly 9 to be coaxial with the casing 11; the adjustment joint 3 adjusts its own length through threads.

[0053] Among them, a movable mud guard cylinder 4 is arranged between the upper guard buckle joint 5 of the oil cylinder and the adjustment joint 3 of this embodiment.

[0054] This embodiment further defines the structure of the process upstream end of the oil cylinder assembly 6, that is, the structure of the top drive connection assembly, which includes an adjustable joint 3, a universal joint 2, and a reducer sub 1. Among them, the reducer sub 1 is a joint with multiple internal diameter connection areas, which can adapt to the connection of external top drive components of different specifications. The universal joint 2 can adjust the distance of the tool in any axial direction, ensuring that the inner circulation seal head assembly 9 can smoothly enter the casing 11, and avoiding the problem that the casing 11 cannot be inserted due to a large wellhead eccentricity. In addition, this embodiment also designs an adjustable joint 3 that can adjust the length, which can adjust the axial length and lengthen the axial length to achieve good sealing.

[0055] Preferably, one end of the lower guard sub 7 of the oil cylinder in this embodiment is connected to the oil cylinder assembly 6, and the other end of the lower guard sub 7 of the oil cylinder extends into the seal gland assembly 8 and is connected to the inner circulation seal head assembly 9.

[0056] Among them, the seal gland assembly 8 of this embodiment includes:

[0057] A first seal gland structure and a second seal gland structure;

[0058] The first seal gland structure is connected to one end of the second seal gland structure close to the lower guard sub 7 of the oil cylinder;

[0059] A casing coupling 902 is arranged inside the second seal gland structure, and the end of the casing coupling 902 extends to the first seal gland structure. A thickened gasket 905 is arranged between the casing coupling 902 and the first seal gland structure;

[0060] A lip seal 904 is arranged between the casing coupling 902 and the second seal gland structure;

[0061] One end of the casing coupling 902 far from the seal gland assembly 8 is sleeved outside the casing 11.

[0062] Among them, the inner circulation seal head assembly 9 of this embodiment includes:

[0063] An inner circulation head 901 extending into the casing 11; and

[0064] An inner circulation head shaft rod connected axially to the inner circulation head 901, and the other end of the inner circulation head shaft rod is connected to the lower guard sub 7 of the oil cylinder;

[0065] A lip seal sleeve 903 is arranged outside one end of the inner circulation head shaft rod close to the inner circulation head 901, and the lip seal sleeve 903 contacts the inner wall of the casing 11.

[0066] In addition, a lock nut 906 is arranged at the connection between the lower guard sub 7 of the oil cylinder and the seal gland assembly 8 to maintain the position of the seal gland assembly 8 relative to the lower guard sub 7 of the oil cylinder.

[0067] During construction, first connect the tool to the external top drive component through the reducer sub 1, and adjust the universal joint 2 so that the tool and the casing 11 are on the same axis to achieve unobstructed passing during hoisting and lowering. Subsequently, connect the pipeline and the control panel, use the external top drive component to lift the casing 11, apply the corresponding torque according to the casing 11 of the corresponding size, use the control panel to adjust the cylinder assembly 6, and determine the sealing condition according to the pressure value so that the seal gland assembly 8 can fit the casing collar 902, and then carry out the construction.

[0068] In the above technical solution, a casing running-in circulating tool for a top drive provided by the present utility model has the following beneficial effects:

[0069] The circulating tool of the present utility model is provided with an internal circulating seal head assembly 9 and a seal gland assembly 8 at the lower end of the cylinder assembly 6. By controlling the extension of the hydraulic cylinder through the control panel, the sealing effect is achieved by means of external sealing oil pressure assistance sealing and internal sealing through pressure to realize expansion sealing, which can ensure the smooth completion of the casing running-in 11 operation.

[0070] Only some exemplary embodiments of the present utility model have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A casing circulation tool for top drive, characterized by: The tool includes: Oil cylinder assembly (6); An upper oil cylinder buckle joint (5) provided at the upper end of the oil cylinder assembly (6) and a lower oil cylinder buckle joint (7) provided at the lower end of the oil cylinder assembly (6); The oil cylinder assembly (6) is connected to the top drive connection assembly via the oil cylinder upper buckle joint (5), and the external top drive component is connected to the oil cylinder assembly (6) via the top drive connection assembly; The oil cylinder assembly (6) is connected to the inner circulation sealing head assembly (9) at the lower end via the oil cylinder lower buckle joint (7), and a sealing pressure cap assembly (8) is provided between the inner circulation sealing head assembly (9) and the oil cylinder lower buckle joint (7); The inner circulation sealing head assembly (9) extends into the sleeve (11) along the axial direction of the sleeve, and the sealing pressure cap assembly (8) is connected to a sleeve coupling (902) disposed outside the sleeve (11) and in contact with the outer wall of the sleeve (11).

2. The casing running circulation tool for top drive according to claim 1, characterized in that: The top drive connection assembly comprises: a distance-adjusting joint (3) connected to the upper retaining joint (5) of the oil cylinder; and A variable buckle joint (1) provided at one end of the distance adjustment joint (3) away from the oil cylinder assembly (6); The variable buckle joint (1) and the adjustable distance joint (3) are connected via a universal joint (2); The variable buckle joint (1) is used to connect an external top drive component, and the universal joint (2) is used to adjust the angle of the oil cylinder assembly (6) and the front end internal circulation sealing head assembly (9) to drive the internal circulation sealing head assembly (9) to be coaxial with the casing (11); The length of the distance adjusting joint (3) is adjusted by means of a thread.

3. The casing running circulation tool for top drive according to claim 2, characterized in that: A movable mud guard cylinder (4) is provided between the oil cylinder upper buckle joint (5) and the distance adjustment joint (3).

4. The casing running circulation tool for top drive according to claim 1, characterized in that: One end of the oil cylinder lower buckle joint (7) is connected to the oil cylinder assembly (6), and the other end of the oil cylinder lower buckle joint (7) extends into the interior of the sealing pressure cap assembly (8) and is connected to the internal circulation sealing head assembly (9).

5. The casing running circulation tool for top drive according to claim 4, characterized in that: The sealing cap assembly (8) comprises: a first sealing pressure cap structure and a second sealing pressure cap structure; The first sealing pressure cap structure is connected to one end of the second sealing pressure cap structure close to the oil cylinder lower buckle joint (7); The casing coupling (902) is provided on the inner side of the second sealing pressure cap structure, and the end of the casing coupling (902) extends to the first sealing pressure cap structure, and a thickened sealing gasket (905) is provided between the casing coupling (902) and the first sealing pressure cap structure; A lip seal ring (904) is provided between the casing coupling (902) and the second sealing pressure cap structure; The sleeve coupling (902) is sleeved on the outside of the sleeve (11) at one end away from the sealing pressure cap assembly (8).

6. The casing running circulation tool for top drive according to claim 5, characterized in that: The inner circulation sealing head assembly (9) comprises: an inner circulation head (901) extending into the casing (11); and An inner circulation head shaft rod connected to the axial direction of the inner circulation head (901), and the other end of the inner circulation head shaft rod is connected to the oil cylinder lower buckle joint (7); A lip seal sleeve (903) is provided on the outside of the inner circulation head shaft rod close to one end of the inner circulation head (901), and the lip seal sleeve (903) contacts the inner wall of the sleeve (11).

Images