A new single barrel double well casing head

Abstract

The utility model relates to a single-cylinder double-well casing head belongs to the well mouth field, including single-cylinder double-well pedestal, cutting edge casing cross, manual flat valve, slip tooth, P type sealing ring, slip hanger, secondary sealing assembly, screw flange, joint and pressure gauge etc. This single-cylinder double-well casing head is installed above the surface casing column, and is used for hanging the well mouth device component of each layer casing and sealing casing annular space outside the surface casing. The single-cylinder double-well casing head pedestal adopts two well mouths on a water isolation casing, and drilling operation is simple, and installation space is saved. The single-cylinder double-well casing head solves the problem that a limited platform drills multiple production wells, saves platform space and facilitates production operation.

Description

Technical Field

[0001] This utility model relates to the field of wellheads, specifically to a single-tube double-well casing head. Background Technology

[0002] The casing head is a wellhead device component installed above the surface casing string to suspend the casing layers other than the surface casing and seal the casing annular space. As a key piece of equipment in the wellhead device, the casing head is a conventional single-tube single-well casing head, which can only extract a single oil layer. For offshore or surface oil field development, there is always a desire to drill more wells with a limited platform in order to save installation space. Summary of the Invention

[0003] The purpose of this utility model is to provide a new type of single-tube double-well casing head, which can use one water-proof casing to drill two independent wells, and the operation between the two wells does not interfere with each other, so as to make full use of the limited platform, save installation space, and improve operation efficiency.

[0004] This utility model provides the following technical solution: a novel single-tube double-well casing head, including a base (1) with a water-proof casing (18) designed, which is sealed between the casing and the base by a slip tooth (5) and a P-type sealing ring (4). The base (1) is provided with a set screw assembly (20) to hold the water-proof casing (18). Two cut-edge casing four-way connectors (8) are installed on the top of the base body (1) and are fastened to the base (1) by bolts (7) and nuts (6). 8) Each borehole is equipped with a sleeve (19), which forms a seal with the base (1) and the base (2) through the slip hanger (2) and the secondary sealing assembly (3). The cut-edge sleeve four-way (8) is installed on one side of the cut-edge sleeve four-way (8). The manual flat valve (9) and the threaded flange (10) form a seal through the steel ring (14). The connection is fastened by the threaded bolt (16), the double-ended bolt (17), and the nut (15). The joint (11) is connected to the pressure gauge (12) and the shut-off valve (13).

[0005] Preferably, the novel single-tube double-well casing head is characterized in that: the base (1) adopts an integral design of a single water-proof casing (18), which saves installation space.

[0006] Preferably, the novel single-tube double-well casing head is characterized in that: the base (1) is provided with a top screw hole, and the water-proof casing (18) is held in place by the top screw assembly (20), so that the water-proof casing (18) is positioned in the center.

[0007] Preferably, the novel single-tube double-well casing head is characterized in that: the casing (19) is equipped with a sealing ring using a slip hanger (2) and a secondary sealing assembly (3) to increase the reliability of the seal.

[0008] Preferably, the novel single-tube double-well casing head is characterized in that: the manual flat valve (9) is connected to the threaded flange (10), the joint (11), the pressure gauge (12), and the shut-off valve (13), and can be used to detect the casing interlayer pressure.

[0009] The beneficial effects of this utility model are: The novel single-tube double-well casing head provided by this utility model adopts a single water-proof casing design, which allows two sets of cut-edge casings to be installed in the same water-proof casing. It is convenient to operate, has a compact structure, and the operation of the two wells does not affect each other, saving installation space and improving operation efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] In the diagram: 1. Base; 2. Slip hanger; 3. Secondary sealing assembly; 4. P-type sealing ring; 5. Slip teeth; 6. Nut; 7. Threaded bolt; 8. Cut-edge sleeve tee; 18. Waterproof sleeve; 19. Sleeve; 20. Top screw assembly.

[0012] Figure 2 This is a schematic diagram of the structure of this utility model;

[0013] In the diagram: 9. Manual flat valve; 10. Threaded flange; 11. Connector; 12. Pressure gauge; 13. Gate valve; 14. Steel ring; 15. Nut; 16. Threaded bolt; 17. Double-ended bolt. Detailed Implementation

[0014] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0015] As shown in the figure, this new type of single-tube double-well casing head includes: a base (1) designed with a water-proof casing (18), which is sealed to the base by means of slip teeth (5) and P-type sealing rings (4); the base (1) is equipped with a set screw assembly (20) to hold the water-proof casing (18); and two cut-edge casing four-way connectors (8) are installed on the top of the base body (1), which are fastened to the base (1) by bolts (7) and nuts (6). Each borehole is equipped with a sleeve (19), which forms a seal with the base (1) and the base (2) through the slip hanger (2) and the secondary sealing assembly (3). The cut-edge sleeve four-way (8) is installed on one side of the cut-edge sleeve four-way (8). The threaded flange (10) forms a seal through the steel ring (14). The connection is fastened by the threaded bolt (16), the double-ended bolt (17), and the nut (15). The joint (11) is connected to the pressure gauge (12) and the shut-off valve (13).

[0016] Preferably, the novel single-tube double-well casing head is characterized in that: the base (1) adopts an integral design of a single water-proof casing (18), which saves installation space.

[0017] Preferably, the novel single-tube double-well casing head is characterized in that: the base (1) is provided with a top screw hole, and the water-proof casing (18) is held in place by the top screw assembly (20), so that the water-proof casing (18) is positioned in the center.

[0018] Preferably, the novel single-tube double-well casing head is characterized in that: the casing (19) is equipped with a sealing ring using a slip hanger (2) and a secondary sealing assembly (3) to increase the reliability of the seal.

[0019] Preferably, the novel single-tube double-well casing head is characterized in that: the manual flat valve (9) is connected to the threaded flange (10), the joint (11), the pressure gauge (12), and the shut-off valve (13), and can be used to detect the casing interlayer pressure.

[0020] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel single barrel double well casing head characterized in that: The base (1) is designed with a water-proof sleeve (18). The sleeve and the base are sealed by a slipper (5) and a P-type sealing ring (4). The base (1) is equipped with a top screw assembly (20) to hold the water-proof sleeve (18). Two cut-edge sleeve four-way (8) are installed on the top of the base (1) and are fastened to the base (1) by a threaded bolt (7) and a nut (6). Each cut-edge sleeve four-way (8) has a sleeve (19) in its through hole. It is sealed to the base (1) and the cut-edge sleeve four-way (8) by a slipper hanger (2) and a secondary sealing assembly (3). A manual flat valve (9) and a threaded flange (10) are installed on one side of the cut-edge sleeve four-way (8) and are sealed by a steel ring (14). They are fastened by a threaded bolt (16), a double-ended bolt (17), and a nut (15). The joint (11) is connected to a pressure gauge (12) and a shut-off valve (13).

2. A novel single barrel double well casing head as claimed in claim 1, wherein: The base (1) is designed with a single waterproof sleeve (18), which saves installation space.

3. A new single barrel double well casing head as claimed in claim 1, wherein: The base (1) is provided with a set screw hole, and the set screw assembly (20) presses against the water-proof sleeve (18) so that the water-proof sleeve (18) is positioned in the center.

4. The novel single barrel double well casing head as claimed in claim 1, wherein: The sleeve (19) is equipped with a sealing ring using a slip hanger (2) and a secondary sealing assembly (3) to increase the reliability of the seal.

5. The novel single barrel double well casing head as claimed in claim 1, wherein: The manual flat valve (9) is connected to the threaded flange (10), connector (11), pressure gauge (12), and shut-off valve (13), and can be used to detect the pressure of the casing interlayer.

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