Novel oil sleeve packing synchronous suspension casing head device

Abstract

The utility model relates to the technical field of oil extraction, in particular to a novel oil sleeve packing synchronous suspension casing head device which comprises a mandrel type casing hanger assembly and a mandrel type oil pipe hanger assembly which are connected through a packing sealing sleeve. The packing sealing sleeve is arranged in the oil pipe four-way joint, the mandrel type casing pipe hanger assembly and the mandrel type oil pipe hanger assembly are inserted into the two ends of the oil pipe four-way joint respectively and connected with the packing sealing sleeve, the other end of the mandrel type casing pipe hanger assembly is inserted into the casing four-way joint, and the other end of the mandrel type oil pipe hanger assembly is inserted into the crossover flange. A sucker rod blowout preventer is connected to the upper portion of the crossover flange, and a slip is connected to the lower portion of the casing pipe four-way joint. The packing sealing sleeve is arranged in the oil pipe four-way joint and used for being communicated with the mandrel type casing pipe hanger assembly and the mandrel type oil pipe hanger assembly, and the sealing effect of the oil pipe four-way joint is further enhanced.

Description

Technical Field

[0001] This utility model relates to the field of oil production technology, specifically a novel oil casing isolation synchronous suspension casing head device. Background Technology

[0002] The existing casing head device hanger mainly consists of the hanger body and a metal sealing assembly. This traditional structural design can still be used normally in oil production and water injection operations, but gas injection operations have higher requirements for product specifications and performance levels, and the safety factor of the ordinary casing head device structure will be greatly reduced during operation.

[0003] Data from oilfield feedback shows that existing casing head devices frequently experience CO2 gas leaks during downhole CO2 gas injection operations. Once a leak occurs, given current technology, the only recourse is to release the bottom hole pressure, resulting in very serious consequences.

[0004] First, it releases a large amount of high-density CO2 gas into the air, affecting the natural ecological environment and the daily lives of the surrounding people.

[0005] Secondly, leaks in the casing head pose a great threat to the lives of workers on site. The CO2 gas injected into the well is in a low-temperature liquid state. Even if it reaches the surface, the temperature is below -40°C, plus a working pressure of over 20MPa. Therefore, if a leak occurs suddenly and sprays onto the workers, it is extremely dangerous.

[0006] Third, once a leak occurs, it involves subsequent maintenance. Oilfield equipment is mostly composed of massive steel mechanical structures. Once maintenance is needed, a large number of mechanized equipment will need to be relocated. This requires a large investment of human resources and also wastes a lot of energy, such as water and electricity. Summary of the Invention

[0007] The purpose of this invention is to provide a novel oil jacket sealing synchronous suspension sleeve head device to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0009] This utility model proposes a novel oil casing and casing packer synchronous suspension casing head device, including a spindle-type casing hanger assembly and a spindle-type tubing hanger assembly. The spindle-type casing hanger assembly and the spindle-type tubing hanger assembly are connected by a packer sealing sleeve. The packer sealing sleeve is disposed inside the tubing four-way connector. The spindle-type casing hanger assembly and the spindle-type tubing hanger assembly are respectively inserted into both ends of the tubing four-way connector and connected to the packer sealing sleeve. The other end of the spindle-type casing hanger assembly is inserted into the casing four-way connector, and the other end of the spindle-type tubing hanger assembly is inserted into a conversion flange. A sucker rod blowout preventer is connected above the conversion flange. A slip is connected below the casing four-way connector. The slip is connected to a base through a slip seat below the slip. The lower end of the casing four-way connector is sealed above the slip through a first sealing ring and a grease injection valve.

[0010] Preferably, one end of the two transverse ferrules of the sleeve is sealed by a first pipe plug, and the other end is provided with a ball valve. The first pipe plug is fixed to the sleeve ferrule by a threaded flange. The threaded flange is fixed to the sleeve ferrule by a first threaded bolt and a first nut, and a first gasket is provided between the threaded flange and the sleeve ferrule.

[0011] Preferably, the casing tee and the oil pipe tee are fixedly connected by a double-ended bolt and a second nut, and a second washer is provided between the casing tee and the oil pipe tee.

[0012] Preferably, both transverse lateral ...

[0013] Preferably, the tubing tee is fixed to the conversion flange by a second threaded bolt, the tubing tee is provided with a set screw assembly that holds the spindle-type tubing hanger assembly in place, and the conversion flange is provided with a plug to seal the gap between the tubing tee and the spindle-type tubing hanger assembly.

[0014] Preferably, the sucker rod blowout preventer is fixed to the conversion flange by a third bolt and a third nut, and the conversion flange and the sucker rod blowout preventer are provided with a third gasket. Ball valves are provided at both ends of the sucker rod blowout preventer, and a fourth gasket is provided on the upper end face of the sucker rod blowout preventer.

[0015] This utility model has the following beneficial effects: A sealing sleeve is installed inside the tubing four-way connector to connect the mandrel-type casing hanger assembly and the mandrel-type tubing hanger assembly. A channel connecting the sealing sleeve is provided on the tubing four-way connector, and the seal is achieved through a manual flat valve and a second pipe plug. Furthermore, a gasket is used between the tubing four-way connector and the casing four-way connector to further enhance the sealing effect. A set screw assembly is provided on the tubing four-way connector to hold the mandrel-type tubing hanger assembly in place. The conversion flange is equipped with a plug to seal the gap between the tubing four-way connector and the mandrel-type tubing hanger assembly, further improving the sealing effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] In the diagram: 1. Base; 2. Slip seat; 3. Slip; 4. First sealing ring; 5. Grease injection valve; 6. Casing tee; 7. First threaded bolt; 8. First nut; 9. Threaded flange; 10. First pipe plug; 11. First gasket; 12. Mandrel-type casing hanger assembly; 13. Second gasket; 14. Double-ended bolt; 15. Second nut; 16. Tubing tee; 17. Manual flat valve; 18. Second pipe plug; 19. Sealing sleeve; 20. Mandrel-type tubing hanger assembly; 21. Top screw assembly; 22. Plug; 23. Second threaded bolt; 24. Converter flange; 25. Third gasket; 26. Third threaded bolt; 27. Third nut; 28. Ball valve; 29. ​​Sucker rod blowout preventer; 30. Fourth gasket. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1As shown, this utility model is a novel oil casing and casing sealing synchronous suspension casing head device, including a mandrel-type casing hanger assembly 12 and a mandrel-type tubing hanger assembly 20. The mandrel-type casing hanger assembly 12 and the mandrel-type tubing hanger assembly 12 are connected by a sealing sleeve 19. The sealing sleeve 19 is disposed inside the tubing cross 16, and the mandrel-type casing hanger assembly 12 and the mandrel-type tubing hanger assembly 20 are respectively inserted into the two ends of the tubing cross 16. One end is connected to the sealing sleeve 19. The other end of the shaft-type casing hanger assembly 12 is inserted into the casing four-way 6. The other end of the spindle-type tubing hanger assembly 20 is inserted into the conversion flange 24. A sucker rod blowout preventer 29 is connected above the conversion flange 24. A slip 3 is connected below the casing four-way 6. The slip 3 is connected to the base 1 through the slip seat 2. The lower end of the casing four-way 6 is sealed above the slip 3 through the first sealing ring 4 and the grease injection valve 5.

[0022] This utility model provides a sealing sleeve 19 inside the tubing four-way connector to connect the mandrel-type sleeve hanger assembly 12 and the mandrel-type tubing hanger assembly 20. The sealing sleeve 19 is fixed inside the tubing four-way connector 16 and connects to the two transverse passages of the tubing four-way connector 16. Both transverse passages of the tubing four-way connector 16 are equipped with a manual flat valve 17 and a second pipe plug 18 for sealing and adjustment. The tubing four-way connector 16 is provided with a set screw assembly 21 that holds the mandrel-type tubing hanger assembly 20 in place. The conversion flange 24 is provided with a plug 22 to seal the gap between the tubing four-way connector 16 and the mandrel-type tubing hanger assembly 20, further enhancing the sealing effect between the tubing four-way connector and the conversion flange.

[0023] In this invention, one end of the two transverse sections of the sleeve four-way 6 is sealed by a first pipe plug 10, and the other end is equipped with a ball valve. The first pipe plug 10 is fixed to the sleeve four-way 6 by a threaded flange 9. The threaded flange 9 is fixed to the sleeve four-way 6 by a first threaded bolt 7 and a first nut 8, and a first gasket 11 is provided between the threaded flange 9 and the sleeve four-way 6. The sleeve four-way 6 and the oil pipe four-way 16 are fixedly connected by a double-ended bolt 14 and a second nut 15, and a second gasket 13 is provided between the sleeve four-way 6 and the oil pipe four-way 16. Both transverse sections of the oil pipe four-way 16 are equipped with manual flat valves 17, and the manual flat valves 17 are equipped with second pipe plugs 18. The oil pipe tee 16 is fixed to the conversion flange 24 by the second threaded bolt 23. The oil pipe tee 16 is provided with a set screw assembly 21 that holds the spindle type oil pipe hanger assembly 20 in place. The conversion flange 24 is provided with a plug 22 that seals the gap between the oil pipe tee 16 and the spindle type oil pipe hanger assembly 20.

[0024] In this utility model, the sucker rod blowout preventer 29 is fixed to the conversion flange 24 by the third threaded bolt 26 and the third nut 27, and the conversion flange 24 and the sucker rod blowout preventer 29 are provided with a third gasket 25. Ball valves 28 are provided at both ends of the sucker rod blowout preventer 29 in the lateral direction, and a fourth gasket 30 is provided on the upper end face of the sucker rod blowout preventer 29.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A novel oil casing and casing isolation synchronous suspension casing head device, comprising a spindle-type casing hanger assembly and a spindle-type tubing hanger assembly, characterized in that: The spindle-type casing hanger assembly and the spindle-type tubing hanger assembly are connected by a sealing sleeve. The sealing sleeve is located inside the tubing four-way connector. The spindle-type casing hanger assembly and the spindle-type tubing hanger assembly are respectively inserted into both ends of the tubing four-way connector and connected to the sealing sleeve. The other end of the spindle-type casing hanger assembly is inserted into the casing four-way connector, and the other end of the spindle-type tubing hanger assembly is inserted into the conversion flange. A sucker rod blowout preventer is connected above the conversion flange. A slip is connected below the casing four-way connector. The slip is connected to the base through a slip seat. The lower end of the casing four-way connector is sealed above the slip through a first sealing ring and a grease injection valve.

2. The novel oil sleeve sealing synchronous suspension sleeve head device according to claim 1, characterized in that, The sleeve tee has two transverse joints, one end of which is sealed by a first pipe plug and the other end is equipped with a ball valve. The first pipe plug is fixed to the sleeve tee by a threaded flange. The threaded flange is fixed to the sleeve tee by a first threaded bolt and a first nut, and a first gasket is provided between the threaded flange and the sleeve tee.

3. The novel oil sleeve sealing synchronous suspension sleeve head device according to claim 1, characterized in that, The casing tee and the oil pipe tee are fixedly connected by a double-ended bolt and a second nut, and a second washer is provided between the casing tee and the oil pipe tee.

4. The novel oil sleeve sealing synchronous suspension sleeve head device according to claim 1, characterized in that, The four-way valve is equipped with two manual flat valves on the horizontal sides, and the manual flat valve is equipped with a second pipe plug.

5. A novel oil sleeve sealing synchronous suspension sleeve head device according to claim 1, characterized in that, The oil pipe tee is fixed to the conversion flange by a second threaded bolt. The oil pipe tee is provided with a set screw assembly that holds the spindle-type oil pipe hanger assembly in place. The conversion flange is provided with a plug to seal the gap between the oil pipe tee and the spindle-type oil pipe hanger assembly.

6. A novel oil sleeve sealing synchronous suspension sleeve head device according to claim 1, characterized in that, The sucker rod blowout preventer is fixed to the conversion flange by a third bolt and a third nut. The conversion flange and the sucker rod blowout preventer are provided with a third gasket. Ball valves are provided at both ends of the sucker rod blowout preventer. A fourth gasket is provided on the upper end face of the sucker rod blowout preventer.

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