CN214660048U

CN214660048U - Simple underwater oil gas exploitation wellhead

Info

Publication number: CN214660048U
Application number: CN202120769286.5U
Authority: CN
Inventors: 弓大为; 樊霞
Original assignee: Shanghai Xiawei Petroleum Equipment Technology Service Co ltd
Current assignee: Shanghai Xiawei Petroleum Equipment Technology Service Co ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-11-09
Anticipated expiration: 2031-04-15

Abstract

A simple underwater oil gas exploitation wellhead comprises a high-pressure wellhead head, a tubing hanger and an upper plug; the tubing hanger and the upper plug are arranged inside the high-pressure well head; the upper plug is arranged at the upper end of the tubing hanger; the device is used as drilling equipment and can be directly transferred to production; the device can be directly produced and developed and can also be used as a sample; the device can improve the installation efficiency and reduce the development cost; the device can be used independently, and can also be connected with other well heads for development and use together.

Description

Simple underwater oil gas exploitation wellhead

Technical Field

The utility model relates to an oil gas exploitation equipment technical field under water especially relates to a simple and easy oil gas exploitation well head under water.

Background

More and more countries develop hydrates, and research and exploration are carried out in China, and trial production is also carried out in the field. With the continuous improvement of the technology, the development strength is increased, the reserves of the hydrate in the south China sea are also higher, the country pays more and more attention to the field, and the exploration and development in the field promote the development and utilization of clean energy. Summarizing the existing exploration and development equipment in the epoch background, a new simple underwater development wellhead equipment is needed.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

In order to solve the technical problems existing in the background technology, the utility model provides a simple underwater oil gas exploitation well head, which is used as a drilling device and can be directly transferred to production; the device can be directly produced and developed and can also be used as a sample; the device can improve the installation efficiency and reduce the development cost; the device can be used independently, and can also be connected with other well heads for development and use together.

(II) technical scheme

In order to solve the problems, the utility model provides a simple underwater oil gas exploitation well head, which comprises a high-pressure well head, an oil pipe hanger and an upper plug; the tubing hanger and the upper plug are arranged inside the high-pressure well head; the upper plug is arranged at the upper end of the tubing hanger; a sitting and hanging step is arranged on the side wall of the lower end in the high-pressure wellhead; a support ring is arranged on the side wall of the lower end of the tubing hanger; the lower end of the support ring is arranged on the sitting hanging step; the oil pipe hanger is sleeved with a lower metal framework seal and an upper metal framework seal; the lower metal framework seal and the upper metal framework seal are positioned above the support ring, and a support framework is arranged between the lower metal framework seal and the upper metal framework seal; the side wall of the high-pressure wellhead is provided with a discharge hole; the middle part of the support framework is of a cage structure; holes corresponding to the discharge holes are arranged between the oil pipe hanger and the cage structure of the support framework; an annular step plane I is arranged on the outer side of the oil pipe hanger; the first annular step plane is positioned above the upper metal framework seal, and the upper end of the first annular step plane is provided with a first support ring; a first locking ring is arranged between the outer side wall of the first supporting ring and the high-pressure wellhead head; the locking ring is sleeved on the first supporting ring; a first compression ring is arranged above the first support ring; the lower end of the first compression ring is contracted and inserted between the side wall of the tubing hanger and the first support ring, and a third retaining ring is arranged between the upper end of the first compression ring and the tubing hanger; a first pipeline is axially arranged in the oil pipe hanger; the lower end of the first pipeline is provided with a production oil pipe, and the upper end of the inside of the first pipeline is provided with a plug thread and a plug; the plug is in threaded connection with one side wall of the pipeline through the plug; the upper end of the tubing hanger is provided with a first sealing hole; a cross-over joint is arranged in the first sealing hole; an anti-rotation block is arranged on the outer side wall of the lower end of the upper plug; an anti-rotation groove is formed in the side wall of the upper end of the oil pipe hanger; the lower end of the anti-rotation block is arranged in the anti-rotation groove; a cross-boundary pipeline is arranged inside the upper plug and the tubing hanger; the two groups of cross-boundary pipelines are connected through a cross-over joint; an annular step plane II is arranged on the side wall of the upper plug; the upper end of the second annular step plane is provided with a second supporting ring; a second locking ring is arranged between the second supporting ring and the high-pressure wellhead head, and a second compression ring is arranged above the second locking ring; the lower end of the pressure ring II is contracted and inserted between the side wall of the tubing hanger and the support ring II, and a baffle ring II is arranged between the upper end of the pressure ring II and the tubing hanger; a through hole is formed in the upper plug; the upper plug and a cross-boundary pipeline inside the tubing hanger correspond to the through hole; the upper end of the upper plug is provided with a second sealing hole, and a second pipeline is axially arranged in the upper plug; the upper end of the inside of the second pipeline is provided with a separator plug and separator threads; the separator plug is in threaded connection with the two side walls of the pipeline through the separator.

Preferably, the outer side of the lower end of the high-pressure well head is sleeved with a low-pressure well head; the lower end of the low-pressure wellhead is connected with a fixed pile.

Preferably, the lower end of the tubing hanger is provided with a baffle ring I; the support ring is sleeved at the lower end of the oil pipe hanger through a baffle ring.

Preferably, a third fixing bolt is arranged at the lower end of the support ring and is arranged at the upper end of the first annular step plane through the third fixing bolt; the lower end of the second supporting ring is provided with a second fixing bolt which is arranged at the upper end of the second annular step plane.

Preferably, a feeding screw thread I is arranged at the upper end of the inner side wall of the pipeline I; and a feeding thread II is arranged at the upper end of the inner side wall of the pipeline II.

Preferably, the anti-rotation block is provided with a first fixing bolt, and the first fixing bolt is arranged on the outer side wall of the lower end of the upper plug.

Preferably, a robot control module is arranged in the second sealing hole.

The above technical scheme of the utility model has following profitable technological effect:

in the utility model, the water-saving device is provided with a water-saving valve,

1. the device can be directly transferred to production as well drilling equipment.

2. The device can be directly produced and developed and can also be used as a sample.

3. The device can improve the installation efficiency and reduce the development cost.

4. The device can be used independently, and can also be connected with other well heads for development and use together.

Drawings

Fig. 1 is the utility model provides a simple and easy underwater oil gas exploitation well head's schematic structure.

Reference numerals: 1. a high-pressure wellhead head; 2. hanging the oil pipe; 3. an upper plug; 4. a discharge hole; 5. a support ring; 6. a first baffle ring; 7. sealing the lower metal framework; 8. sealing the upper metal framework; 9. a first lock ring; 10. a first supporting ring; 11. a first compression ring; 12. feeding the screw thread I; 13. a plug; 14. plug threads; 15. a rotation prevention block; 16. fixing a first bolt; 17. an anti-rotation slot; 18. sealing the first hole; 19. a crossover joint; 20. a second lock ring; 21. fixing a second bolt; 22. a second compression ring; 23. a second baffle ring; 24. a baffle ring III; 25. sealing the second hole; 26. feeding the screw thread II; 27. a separator plug; 28. a divider thread; 29. a through hole; 30. a robot control module; 101. a low-pressure wellhead head; 102. fixing the pile; 201. step hanging is carried out; 202. producing an oil pipe; 203. a support framework; 204. fixing a bolt III; 205. and a second support ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1, the utility model provides a simple underwater oil gas exploitation well head, which comprises a high-pressure well head 1, a tubing hanger 2 and an upper plug 3; the tubing hanger 2 and the upper plug 3 are arranged inside the high-pressure wellhead head 1; the upper plug 3 is arranged at the upper end of the tubing hanger 2; a sitting and hanging step 201 is arranged on the side wall of the lower end in the high-pressure wellhead head 1; a support ring 5 is arranged on the side wall of the lower end of the tubing hanger 2; the lower end of the support ring 5 is arranged on the sitting hanging step 201; a lower metal framework seal 7 and an upper metal framework seal 8 are sleeved on the oil pipe hanger 2; the lower metal framework seal 7 and the upper metal framework seal 8 are positioned above the support ring 5, and a support framework 203 is arranged between the lower metal framework seal and the upper metal framework seal; the side wall of the high-pressure well head 1 is provided with a discharge hole 4; the middle part of the support framework 203 is of a cage structure; holes corresponding to the discharge holes 4 are arranged between the oil pipe hanger 2 and the cage structure of the support framework 203; an annular step plane I is arranged on the outer side of the tubing hanger 2; the first annular step plane is positioned above the upper metal framework seal 8, and the upper end of the first annular step plane is provided with a first support ring 10; a first locking ring 9 is arranged between the outer side wall of the first supporting ring 10 and the high-pressure wellhead head 1; the first locking ring 9 is sleeved on the first support ring 10; a first compression ring 11 is arranged above the first support ring 10; the lower end of the compression ring I11 is contracted and inserted between the side wall of the tubing hanger 2 and the support ring I10, and a baffle ring III 24 is arranged between the upper end of the compression ring I and the tubing hanger 2; a first pipeline is axially arranged inside the tubing hanger 2; the lower end of the first pipeline is provided with a production oil pipe 202, and the upper end inside the first pipeline is provided with a plug thread 14 and a plug 13; the plug 13 is connected with one side wall of the pipeline through a plug thread 14; the upper end of the tubing hanger 2 is provided with a first sealing hole 18; a crossover joint 19 is arranged inside the first sealing hole 18; the outer side wall of the lower end of the upper plug 3 is provided with an anti-rotation block 15; an anti-rotation groove 17 is arranged on the side wall of the upper end of the tubing hanger 2; the lower end of the anti-rotation block 15 is arranged in the anti-rotation groove 17; a cross-boundary pipeline is arranged inside the upper plug 3 and the tubing hanger 2; the two groups of cross-boundary pipelines are connected through a cross-over joint 19; an annular step plane II is arranged on the side wall of the upper plug 3; a second supporting ring 205 is arranged at the upper end of the second annular step plane; a second locking ring 20 is arranged between the second support ring 205 and the high-pressure wellhead head 1, and a second compression ring 22 is arranged above the second locking ring; the lower end of the second compression ring 22 is contracted and inserted between the side wall of the tubing hanger 2 and the second support ring 205, and a second baffle ring 23 is arranged between the upper end of the second compression ring and the tubing hanger 2; a through hole 29 is formed in the upper plug 3; the cross-boundary pipeline inside the upper plug 3 and the tubing hanger 2 corresponds to the through hole 29; a second sealing hole 25 is formed in the upper end of the upper plug 3, and a second pipeline is axially arranged in the second sealing hole; the upper end of the interior of the second pipeline is provided with a separator plug 27 and separator threads 28; the divider plug 27 is connected to the two side walls of the conduit by divider threads 28.

In an alternative embodiment, the low-pressure wellhead head 101 is sleeved outside the lower end of the high-pressure wellhead head 1; the lower end of the low-pressure wellhead 101 is connected with a spud 102.

In an alternative embodiment, the lower end of the tubing hanger 2 is provided with a baffle ring I6; the support ring 5 is sleeved at the lower end of the tubing hanger 2 through the baffle ring I6.

In an alternative embodiment, the lower end of the first bracing ring 10 is provided with a third fixing bolt 204, and the third fixing bolt 204 is arranged at the upper end of the first annular step plane; the lower end of the second supporting ring 205 is provided with a second fixing bolt 21, and the second fixing bolt 21 is arranged at the upper end of the second annular step plane.

In an alternative embodiment, the upper end of the inner side wall of the pipeline is provided with a feeding screw thread I12; and a feeding screw thread II 26 is arranged at the upper end of the inner side wall of the pipeline II.

In an alternative embodiment, the anti-rotation block 15 is provided with a first fixing bolt 16, and is arranged on the outer side wall of the lower end of the upper plug 3 through the first fixing bolt 16.

In an alternative embodiment, a robot control module 30 is disposed within the second seal bore 25.

The utility model discloses in, the device's theory of operation is at a spud pile 102 section of thick bamboo preinstallation well head equipment, fixes the oral 101 of low-pressure well on spud pile 102, then fixes the installation of high-pressure well head 1 that has the technical casing pipe in the oral 101 the inside of low-pressure well, sends into with spud pile 102 together. After the drilling equipment is put in place, the drilling equipment is put down to operate according to the design, the tubing hanger 2 is put down to be installed at a preset position, and the tubing hanger 2 can be sent to the electric submersible pump, the sensor and the chemical agent pipeline together according to the design requirement in the putting down process. At the upper part of the tubing hanger 2 there is a crossover connection 19 for various lines, which can be connected to the control line of the upper plug 3.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A simple underwater oil gas exploitation wellhead is characterized by comprising a high-pressure wellhead head (1), a tubing hanger (2) and an upper plug (3); the tubing hanger (2) and the upper plug (3) are arranged inside the high-pressure well head (1); the upper plug (3) is arranged at the upper end of the tubing hanger (2);

a sitting and hanging step (201) is arranged on the side wall of the lower end in the high-pressure wellhead head (1); a support ring (5) is arranged on the side wall of the lower end of the oil pipe hanger (2); the lower end of the support ring (5) is arranged on the sitting hanging step (201); a lower metal framework seal (7) and an upper metal framework seal (8) are sleeved on the oil pipe hanger (2); the lower metal framework seal (7) and the upper metal framework seal (8) are positioned above the support ring (5), and a support framework (203) is arranged between the lower metal framework seal and the upper metal framework seal; the side wall of the high-pressure well head (1) is provided with a discharge hole (4); the middle part of the support framework (203) is of a cage structure; holes corresponding to the discharge holes (4) are arranged between the oil pipe hanger (2) and the cage structure of the support framework (203); the outer side of the tubing hanger (2) is provided with a first annular step plane; the first annular step plane is positioned above the upper metal framework seal (8), and the upper end of the first annular step plane is provided with a first support ring (10); a first locking ring (9) is arranged between the outer side wall of the first supporting ring (10) and the high-pressure wellhead head (1); the first lock ring (9) is sleeved on the first support ring (10); a first compression ring (11) is arranged above the first support ring (10); the lower end of the compression ring I (11) is contracted and inserted between the side wall of the tubing hanger (2) and the support ring I (10), and a baffle ring III (24) is arranged between the upper end of the compression ring I and the tubing hanger (2); a first pipeline is axially arranged inside the tubing hanger (2); the lower end of the first pipeline is provided with a production oil pipe (202), and the upper end inside the first pipeline is provided with a plug thread (14) and a plug (13); the plug (13) is connected with one side wall of the pipeline through a plug thread (14); the upper end of the tubing hanger (2) is provided with a first sealing hole (18); a cross-over joint (19) is arranged inside the first sealing hole (18);

the outer side wall of the lower end of the upper plug (3) is provided with an anti-rotation block (15); an anti-rotation groove (17) is arranged on the side wall of the upper end of the oil pipe hanger (2); the lower end of the anti-rotation block (15) is arranged in the anti-rotation groove (17); a cross-boundary pipeline is arranged inside the upper plug (3) and the tubing hanger (2); the two groups of cross-boundary pipelines are connected through a cross-over joint (19); an annular step plane II is arranged on the side wall of the upper plug (3); a second supporting ring (205) is arranged at the upper end of the second annular step plane; a second locking ring (20) is arranged between the second support ring (205) and the high-pressure wellhead head (1), and a second compression ring (22) is arranged above the second locking ring; the lower end of the compression ring II (22) is contracted and inserted between the side wall of the tubing hanger (2) and the support ring II (205), and a baffle ring II (23) is arranged between the upper end of the compression ring II and the tubing hanger (2); a through hole (29) is arranged in the upper plug (3); the cross-boundary pipelines inside the upper plug (3) and the tubing hanger (2) correspond to the through hole (29); a second sealing hole (25) is formed in the upper end of the upper plug (3), and a second pipeline is axially arranged in the second sealing hole; the upper end of the interior of the second pipeline is provided with a separator plug (27) and separator threads (28); the divider plug (27) is connected to the two side walls of the conduit by divider threads (28).

2. The simple subsea hydrocarbon production wellhead as claimed in claim 1, wherein the low pressure wellhead section (101) is sleeved outside the lower end of the high pressure wellhead section (1); the lower end of the low-pressure well head (101) is connected with a fixed pile (102).

3. The simple subsea hydrocarbon recovery wellhead as claimed in claim 1, wherein a first stop ring (6) is provided at the lower end of the tubing hanger (2); the support ring (5) is sleeved at the lower end of the oil pipe hanger (2) through the first baffle ring (6).

4. The simple underwater oil and gas exploitation wellhead as claimed in claim 1, wherein a third fixing bolt (204) is arranged at the lower end of the first support ring (10), and is arranged at the upper end of the first annular step plane through the third fixing bolt (204); the lower end of the second supporting ring (205) is provided with a second fixing bolt (21) which is arranged at the upper end of the second annular step plane through the second fixing bolt (21).

5. The simple subsea hydrocarbon recovery wellhead assembly of claim 1 in which the upper end of the inner sidewall of the conduit is provided with a feed screw thread one (12); and a feeding screw thread II (26) is arranged at the upper end of the inner side wall of the pipeline II.

6. The simple underwater oil and gas exploitation wellhead as claimed in claim 1, wherein the anti-rotation block (15) is provided with a first fixing bolt (16) which is arranged on the outer side wall of the lower end of the upper plug (3) through the first fixing bolt (16).

7. The simple subsea hydrocarbon recovery wellhead as claimed in claim 1 in which a robotic control module (30) is located within the second seal bore (25).