Injection-production integrated thermal recovery wellhead device capable of ascending and descending

Abstract

The utility model provides an injection-production integrated thermal recovery wellhead device capable of ascending and descending, and relates to the technical field of thermal recovery wellhead devices, the injection-production integrated thermal recovery wellhead device comprises a wellhead four-way body and a sleeve, the sleeve is arranged in the wellhead four-way body, and the surface of a fixed oil pipe is sleeved with the sleeve. An oil pipe hanger is installed at the top end of the wellhead four-way body, thermal recovery gate valves are installed at the two ends and the top end of the wellhead four-way body, and the top ends of the thermal recovery gate valves at the top end of the wellhead four-way body are connected with four-way connecting pieces. The thermal recovery gate valve and the four-way connecting piece on one side of the wellhead four-way body are both connected with conveying pipes, telescopic flow assemblies are arranged on the surfaces of the conveying pipes, an original single, non-deformable and easily-squeezed flow pipeline is changed into a combined structure capable of being lengthened and shortened, the measuring and cutting steps in the installation process are omitted, and the installation efficiency is improved. And the operation time and the fire operation are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of thermal recovery wellhead devices, and in particular to an integrated injection and production thermal recovery wellhead device that can be raised and lowered. Background Technology

[0002] As my country’s underground heavy oil thermal recovery scale gradually increases, both onshore and offshore thermal recovery wellheads will face the problem of wellhead equipment being heated and lifted when in use. That is, when high temperature and high pressure steam is injected into the bottom of the well through the wellhead, the pipe body expands and elongates due to heat, and the cementing quality deteriorates over time (the bonding between the pipe body and the underground cement is destroyed). At this time, the wellhead equipment will be heated and lifted as a whole.

[0003] After the wellhead equipment is installed, the on-site steam injection and oil production pipelines have been welded. When the wellhead equipment is raised to a large height, it will exert significant shear force on the pipelines, posing a safety hazard. If the pipeline ruptures, it will not only cause the leakage of high-temperature steam, endangering the lives of on-site personnel, but also cause the spillage of produced oil, resulting in environmental pollution. Furthermore, thermal recovery wellheads usually require on-site process welding, which can only be carried out after the wellhead installation is completed. Before welding, on-site measurement, cutting, welding, and other hot work operations are required, which are inherently dangerous.

[0004] To address these issues, an integrated injection-production thermal recovery wellhead device that can be raised and lowered is designed. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides an integrated injection and production wellhead device that can be raised and lowered, with the functions of horizontal and vertical flow extension or shortening, and is easy to install.

[0006] This utility model adopts the following technical solution: a raised and lowerable injection-production integrated thermal recovery wellhead device, including a wellhead four-way body and a casing. The casing is installed inside the wellhead four-way body, and the inside of the casing is fitted onto the surface of the fixed tubing. A tubing hanger is installed at the top of the wellhead four-way body. Thermal recovery gate valves are installed at both ends and the top of the wellhead four-way body. The top of the thermal recovery gate valve at the top of the wellhead four-way body is connected to a four-way connector. The thermal recovery gate valve and the four-way connector on one side of the wellhead four-way body are both connected to a delivery pipe. A telescopic flow assembly is provided on the surface of the delivery pipe. The telescopic flow assembly includes a telescopic outer tube, a telescopic inner tube, a gasket, a combined seal, a packing gland, a sealing gland, and a flange gland. The telescopic inner tube is inserted inside the telescopic outer tube. The gasket, the combined seal, and the packing gland are all installed between the telescopic inner tube and the telescopic outer tube. The sealing gland is installed on the surface of the telescopic outer tube, and the flange gland is installed on the surface of the telescopic outer tube.

[0007] As a preferred embodiment of the present invention, an integrated injection and production thermal recovery wellhead device that can be raised and lowered, the thermal recovery gate valve on the other side of the wellhead four-way body is fixed by a welded neck flange, and the tubing hanger is installed on the top of the wellhead four-way body by an upper flange.

[0008] As a preferred embodiment of the integrated injection and production thermal recovery wellhead device of this utility model, the thermal recovery gate valve on one side of the wellhead four-way body is connected to the delivery pipe through an elbow connector.

[0009] As a preferred embodiment of the integrated injection and production thermal recovery wellhead device of this utility model, the telescopic flow assembly at the top of the wellhead four-way body is connected to the heavy oil production device, and the telescopic flow assembly on one side of the wellhead four-way body is connected to the dual-channel steam generator.

[0010] As a preferred embodiment of the injection-production integrated thermal recovery wellhead device of this utility model, the telescopic flow component at the top of the wellhead four-way body and the telescopic flow component on the side of the wellhead four-way body are vertically distributed.

[0011] As a preferred embodiment of the injection-production integrated thermal recovery wellhead device of this utility model, which can be raised and lowered, the combined seal is V-shaped.

[0012] In a preferred embodiment of this utility model of an integrated injection and production thermal wellhead device that can be raised and lowered, the sealing cap, the flange cap, and the telescopic outer pipe are all fixed together by bolts and nuts.

[0013] In a preferred embodiment of this utility model of an integrated injection and production thermal recovery wellhead device that can be raised and lowered, the delivery pipe, the dual-channel steam generator, and the heavy oil production device are all connected by welded neck flanges.

[0014] Compared with existing technologies, the advantages and positive effects of this utility model are as follows: In actual use, the nuts below the flange of the telescopic outer pipe can be adjusted according to the actual situation of the on-site process pipeline to lengthen or shorten the telescopic flow. Then, the required length is adjusted, and finally, the upper end of the telescopic inner pipe and the lower end of the telescopic outer pipe are welded to the on-site process pipeline. At this time, the telescopic inner pipe and the telescopic outer pipe are not fixed axially. When the wellhead is heated and lifted, the on-site process pipeline and the telescopic outer pipe move upward together, while the telescopic inner pipe can move axially within the telescopic outer pipe. This avoids problems such as misalignment of the flow connection on the wellhead side. It transforms the original single, non-deformable, and easily compressed flow pipeline into a combined structure that can be lengthened and shortened, saving measurement and cutting steps during installation, reducing operation time and hot work operations; it also avoids problems such as misalignment of the flow connection on the side when the wellhead is heated and lifted. Attached Figure Description

[0015] Figure 1 A schematic diagram of an integrated injection and production thermal recovery wellhead device that can be raised and lowered is provided for this utility model;

[0016] Figure 2 This invention presents a schematic diagram of a telescopic flow component in an integrated injection-production thermal recovery wellhead device that can be raised and lowered.

[0017] Legend:

[0018] 1. Wellhead four-way body; 2. Casing; 3. Fixed tubing; 4. Tubing hanger; 5. Thermal recovery gate valve; 6. Four-way connector; 7. Delivery pipe; 8. Telescopic flow assembly; 801. Telescopic outer pipe; 802. Telescopic inner pipe; 803. Gasket; 804. Combined seal; 805. Packing gland; 806. Sealing gland; 807. Flange gland; 9. Weld neck flange; 10. Upper flange; 11. Elbow connector; 12. T-connector; 13. Dual-channel steam generator; 14. Heavy oil production device. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1

[0022] This application incorporates existing technologies, such as Figures 1 to 2 As shown, this utility model provides a technical solution: a raised and lowerable integrated injection and production thermal recovery wellhead device, including a wellhead four-way body 1 and a casing 2. The casing 2 is installed inside the wellhead four-way body 1, and the inside of the casing 2 is fitted onto the surface of the fixed tubing 3. A tubing hanger 4 is installed at the top of the wellhead four-way body 1, and the tubing hanger 4 is installed at the top of the wellhead four-way body 1 through an upper flange 10. Thermal recovery gate valves 5 are installed at both ends and the top of the wellhead four-way body 1. The top of the thermal recovery gate valve 5 at the top of the wellhead four-way body 1 is connected to a four-way connector 6. The thermal recovery gate valve 5 and the four-way connector 6 on one side of the wellhead four-way body 1 are both connected to a delivery pipe 7. The thermal recovery gate valve 5 on one side of the wellhead four-way body 1 is connected to the delivery pipe 7 through an elbow connector 11. The thermal recovery gate valve 5 on the other side of the wellhead four-way body 1 is fixed by a weld neck flange 9. The delivery pipe 7 is connected to the dual-channel steam generator 13 and the heavy oil production device 14 through weld neck flanges 9. The surface of the delivery pipe 7 is provided with a telescopic extension mechanism. The process assembly 8, the telescopic process assembly 8 at the top of the wellhead four-way body 1, is connected to the heavy oil production device 14. The telescopic process assembly 8 on one side of the wellhead four-way body 1 is connected to the dual-channel steam generator 13. The telescopic process assembly 8 at the top of the wellhead four-way body 1 and the telescopic process assembly 8 on the side of the wellhead four-way body 1 are vertically distributed. The telescopic process assembly 8 includes a telescopic outer pipe 801, a telescopic inner pipe 802, a gasket 803, a combined seal 804, a packing gland 805, and a sealing gland 806. The flange cover 807 and the combination seal 804 are V-shaped. The telescopic inner tube 802 is inserted into the telescopic outer tube 801. The gasket 803, the combination seal 804 and the packing cover 805 are all installed between the telescopic inner tube 802 and the telescopic outer tube 801. The sealing cover 806 is installed on the surface of the telescopic outer tube 801. The flange cover 807 is installed on the surface of the telescopic outer tube 801. The sealing cover 806, the flange cover 807 and the telescopic outer tube 801 are all fixed by bolts and nuts.

[0023] In this implementation scheme: by installing the gasket 803, combined seal 804, packing gland 805, and sealing gland 806 into the inner cavity of the telescopic outer pipe 801, the sealing gland 806 can compress the gasket 803 and combined seal 804, causing them to elastically deform, thereby achieving a better sealing effect. Simultaneously, the combined seal 804 is designed as a V-shape; the V-shaped cross-section can expand radially under pressure, tightly fitting the sealing surface, effectively preventing liquid or gas leakage and improving the sealing effect of the telescopic flow assembly 8. In actual use, it can be adjusted according to the on-site flow pipeline... In practice, the nuts below the flange of the telescopic outer tube 801 are adjusted to lengthen or shorten the telescopic flow, and then adjusted to the required length. Finally, the upper end of the telescopic inner tube 802 and the lower end of the telescopic outer tube 801 are welded to the field flow pipeline. At this time, the telescopic inner tube 802 and the telescopic outer tube 801 are not fixed in the axial direction. When the wellhead is heated and lifted, the field flow pipeline and the telescopic outer tube 801 move upward together, while the telescopic inner tube 802 can move axially within the telescopic outer tube 801. This avoids problems such as misalignment of the flow connection on the wellhead side.

[0024] Working principle: In actual use, the nuts below the flange of the telescopic outer pipe 801 are adjusted according to the actual situation of the on-site process pipeline to extend or shorten the telescopic pipeline. Then, it is adjusted to the required length. Finally, the upper end of the telescopic inner pipe 802 and the lower end of the telescopic outer pipe 801 are welded to the on-site process pipeline respectively. At this time, the telescopic inner pipe 802 and the telescopic outer pipe 801 are not fixed in the axial direction. When the wellhead is heated and lifted, the on-site process pipeline and the telescopic outer pipe 801 move upward together, while the telescopic inner pipe 802 can move axially in the telescopic outer pipe 801. This avoids the problem of misalignment of the process connection on the side of the wellhead. The original single, non-deformable, and easily squeezed process pipeline is changed into a combined structure that can be extended and shortened. This saves the measurement and cutting steps during installation, reduces the operation time and hot work, and avoids the problem of misalignment of the process connection on the side when the wellhead is heated and lifted.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A raised and lowerable integrated injection-production thermal recovery wellhead device, comprising a wellhead four-way body (1) and a casing (2), characterized in that: The wellhead four-way body (1) is internally provided with a casing (2), the inside of which is fitted onto the surface of the fixed tubing (3). A tubing hanger (4) is installed at the top of the wellhead four-way body (1). Thermal recovery gate valves (5) are installed at both ends and the top of the wellhead four-way body (1). A four-way connector (6) is connected to the top of the thermal recovery gate valve (5) at the top of the wellhead four-way body (1). A delivery pipe (7) is connected to both the thermal recovery gate valve (5) and the four-way connector (6) on one side of the wellhead four-way body (1). A telescopic flow assembly (8) is provided on the surface of the delivery pipe (7). The device includes a telescopic outer tube (801), a telescopic inner tube (802), a gasket (803), a combination seal (804), a packing gland (805), a sealing gland (806), and a flange gland (807). The telescopic inner tube (802) is inserted inside the telescopic outer tube (801). The gasket (803), the combination seal (804), and the packing gland (805) are all installed between the telescopic inner tube (802) and the telescopic outer tube (801). The sealing gland (806) is installed on the surface of the telescopic outer tube (801), and the flange gland (807) is installed on the surface of the telescopic outer tube (801).

2. The raised and lowerable integrated injection-production thermal recovery wellhead device according to claim 1, characterized in that: The thermal recovery gate valve (5) on the other side of the wellhead four-way body (1) is fixed by a weld neck flange (9), and the tubing hanger (4) is installed on the top of the wellhead four-way body (1) by an upper flange (10).

3. The raised and lowerable integrated injection-production thermal recovery wellhead device according to claim 2, characterized in that: The thermal recovery gate valve (5) on one side of the wellhead four-way body (1) is connected to the delivery pipe (7) through the elbow connector (11).

4. The raised and lowerable integrated injection-production thermal recovery wellhead device according to claim 3, characterized in that: The telescopic flow assembly (8) at the top of the wellhead four-way body (1) is connected to the heavy oil production device (14), the telescopic flow assembly (8) on one side of the wellhead four-way body (1) is connected to the dual-channel steam generator (13), and a three-way connector (12) is connected between the dual-channel steam generator (13) and the telescopic flow assembly (8).

5. The raised and lowerable integrated injection-production thermal recovery wellhead device according to claim 4, characterized in that: The telescopic flow assembly (8) at the top of the wellhead four-way body (1) and the telescopic flow assembly (8) on the side of the wellhead four-way body (1) are distributed vertically.

6. The raised and lowerable integrated injection-production thermal recovery wellhead device according to claim 5, characterized in that: The combined seal (804) is V-shaped.

7. The raised and lowerable integrated injection-production thermal recovery wellhead device according to claim 6, characterized in that: The sealing gland (806), the flange gland (807), and the telescopic outer tube (801) are all fixed together by bolts and nuts.

8. The raised and lowerable integrated injection-production thermal recovery wellhead device according to claim 7, characterized in that: The delivery pipe (7), the dual-channel steam generator (13), and the heavy oil extractor (14) are all connected by weld neck flanges (9).

Images