A device to replace the installation position function of 13-3 / 8” sleeve hanger

Abstract

This invention relates to a device that replaces the installation position function of a 13-3 / 8” casing hanger, comprising a body, a knurled support shoulder, a pressure relief hole, a casing hanger support shoulder, a flow channel groove, a suspension key, and an anti-rotation threaded hole. The body has a hollow cavity, with the knurled support shoulder and pressure relief hole at the lower part of the body, and the pressure relief hole located below the knurled support shoulder. The inner wall of the hollow cavity has a suspension key and a flow channel groove, which are spaced adjacent to each other. The anti-rotation threaded hole is located on the circumference of the body and penetrates the flow channel groove. The upper part of the hollow cavity has a casing hanger support shoulder for seating a 9-5 / 8” casing hanger. This invention ensures that the 9-5 / 8” casing hanger can be correctly seated in the original position of the high-pressure wellhead inner bore without the 13-3 / 8” casing hanger being installed.

Description

Technical Field

[0001] This invention relates to the field of offshore oil drilling and production equipment technology, specifically to a device that replaces the installation position function of a 13-3 / 8” casing hanger. Background Technology

[0002] In recent years, as offshore oil and gas development has continued to advance into deep-sea areas, the application of subsea wellheads has become increasingly widespread. Subsea wellhead systems consist of high and low pressure wellheads and casing hangers of various specifications. Faced with increasingly high drilling costs, how to reduce drilling costs has become an urgent problem to be solved in offshore oil and gas extraction.

[0003] Conventional drilling processes use a configuration of 30” casing + 20” casing + 13-3 / 8” casing + 9-5 / 8” casing, but this combination drilling method is costly.

[0004] Therefore, it is necessary to design a device to replace the installation position function of the 13-3 / 8” casing hanger, so as to ensure that the 9-5 / 8” casing hanger can be correctly seated in the original position of the inner hole of the high-pressure wellhead. Summary of the Invention

[0005] The purpose of this invention is to provide a device that can replace the installation position function of the 13-3 / 8” casing hanger, so as to solve the problem of how to ensure that the 9-5 / 8” casing hanger can be correctly seated in the original position of the inner hole of the high-pressure wellhead when the 13-3 / 8” casing hanger is not installed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for replacing the installation position function of a 13-3 / 8” sleeve hanger includes a body, a knurled support shoulder, a pressure relief hole, a sleeve hanger support shoulder, a flow channel groove, a suspension key, and an anti-rotation threaded hole. The body has a hollow cavity. The lower part of the body has the knurled support shoulder and the pressure relief hole. The pressure relief hole is located below the knurled support shoulder. The inner wall of the hollow cavity has the suspension key and the flow channel groove, which are arranged adjacent to each other at intervals. The anti-rotation threaded hole is located on the circumference of the body and penetrates the flow channel groove. The upper part of the hollow cavity has the sleeve hanger support shoulder, which is used to seat a 9-5 / 8” sleeve hanger.

[0008] Preferably, the device for replacing the installation position function of the 13-3 / 8” sleeve hanger is provided with a smooth support surface and a guide slope on the upper part of the hollow cavity. The smooth support surface is located above the bearing shoulder of the sleeve hanger, and the guide slope is located above the smooth support surface.

[0009] The device for replacing the installation position function of the 13-3 / 8” sleeve hanger, preferably, includes a first inclined surface and a second inclined surface, the first inclined surface being disposed above the second inclined surface, the second inclined surface being connected to the smooth support surface, and the slope of the second inclined surface being greater than the slope of the first inclined surface.

[0010] The device for replacing the installation position function of the 13-3 / 8” sleeve hanger is preferably provided in that the slope angle of the first inclined surface is 20-25° and the slope angle of the second inclined surface is 40-50°.

[0011] Preferably, the device that replaces the installation position function of the 13-3 / 8” sleeve hanger has a third inclined surface on the bearing knurled shoulder, the slope angle of the third inclined surface is 55-65°, and the third inclined surface is provided with grid knurling.

[0012] Preferably, in the device that replaces the installation position function of the 13-3 / 8” sleeve hanger, the bearing shoulder of the sleeve hanger is an inclined surface with a slope angle of 55-65°.

[0013] Preferably, in the device that replaces the installation position function of the 13-3 / 8” sleeve hanger, the upper end of the suspension key is provided with a 40-50° inclined surface.

[0014] The present invention has the following advantages due to the adoption of the above technical solutions:

[0015] The load-bearing knurled shoulder is used to sit on the inner hole shoulder surface of the high-pressure wellhead. The load-bearing knurled shoulder is machined with a grid knurling, which can increase the friction.

[0016] The pressure relief hole is used to provide a water pressure relief channel during installation to prevent the device from failing to be properly seated due to excessive water pressure at the installation location.

[0017] The bearing shoulder of the casing hanger is used to provide a seating position for the 9-5 / 8” casing hanger;

[0018] The flow channel is used to provide a return flow path for the fluid, and also to provide a path for the installation of 9-5 / 8” sleeve hangers;

[0019] The suspension key is used to mate with the 9-5 / 8” bushing hanger to suspend the weight of the device.

[0020] The anti-rotation threaded hole is used to mate with the anti-rotation screw, which is inserted into the bottom of the flow channel groove to provide anti-rotation function;

[0021] The guide ramp is used to guide the 9-5 / 8” sleeve hanger into the correct installation position;

[0022] The smooth front face is designed to mate with the straight face of a 9-5 / 8” casing, providing a straightening function.

[0023] This invention can be used to connect with a 9-5 / 8” casing hanger. When in use, it sits in the installation position of a 13-3 / 8” casing hanger, replacing the function of the 13-3 / 8” casing hanger. It satisfies the requirement to change the 20” casing suspended at the bottom of the high-pressure wellhead to a 13-3 / 8” casing by means of a diameter change, eliminating the need for the 13-3 / 8” casing hanger. This achieves the goal of saving one casing installation process, improving efficiency, and reducing operating costs. Attached Figure Description

[0024] Figure 1 This is a front cross-sectional view of the present invention;

[0025] Figure 2 This is a top sectional view of the present invention;

[0026] Figure 3 This is a front cross-sectional view of the present invention and the 9-5 / 8” sleeve hanger in use;

[0027] Figure 4 This is a top sectional view of the present invention and the 9-5 / 8” sleeve hanger in use;

[0028] Figure 5 This is a front cross-sectional view of the present invention in use with a 9-5 / 8” casing hanger and a high-pressure wellhead.

[0029] In the picture:

[0030] 100. Body; 200. 9-5 / 8” casing hanger; 300. High-pressure wellhead nozzle; 400. Anti-rotation screw;

[0031] 1. Load-bearing knurled shoulder; 2. Pressure relief hole; 3. Sleeve hanging load-bearing shoulder; 4. Flow channel groove; 5. Suspension key;

[0032] 6. Anti-rotation threaded hole; 7. Smooth support surface; 8. Guide slope; 9. Hollow cavity; 10-1. First slope;

[0033] 10-2, Second inclined plane; 10-3, Third inclined plane. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] In the description of this invention, it should be noted that the terms "above", "below", "first", "second" and "third", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up" and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] This invention provides a device to replace the installation position function of a 13-3 / 8” sleeve hanger. The invention includes a body, a knurled support shoulder, a pressure relief hole, a sleeve hanger support shoulder, a flow channel groove, a suspension key, and an anti-rotation threaded hole. The body has a hollow cavity. The lower part of the body has the knurled support shoulder and the pressure relief hole, with the pressure relief hole located below the knurled support shoulder. The inner wall of the hollow cavity has the suspension key and the flow channel groove, which are spaced apart and adjacent to each other. The anti-rotation threaded hole is located on the circumference of the body and penetrates the flow channel groove. The upper part of the hollow cavity has the sleeve hanger support shoulder, which is used to seat a 9-5 / 8” sleeve hanger.

[0038] This invention ensures that a 9-5 / 8” casing hanger can be correctly seated in the original position of the inner hole of the high-pressure wellhead without the need for a 13-3 / 8” casing hanger.

[0039] See Figure 1 and Figure 2 As shown, a device for replacing the installation position function of a 13-3 / 8” sleeve hanger includes a body 100, a bearing knurled shoulder 1, a pressure relief hole 2, a sleeve hanger bearing shoulder 3, a flow channel groove 4, a suspension key 5, an anti-rotation threaded hole 6, a smooth support surface 7, and a guide slope 8.

[0040] The body 100 has a hollow cavity 9. The lower part of the body 100 has a bearing knurled platform 1 and pressure relief holes 2. The bearing knurled platform shoulder 1 has a third inclined surface 10-3 with a slope angle of 55-65°, preferably 60°. A grid knurling is machined on the third inclined surface 10-3. The lower part of the bearing knurled platform 1 has pressure relief holes 2, which are through holes. The number of pressure relief holes 2 is 15-25, preferably 20.

[0041] The inner wall of the hollow cavity 9 is provided with a suspension key 5 and a flow channel 4. The suspension key 5 and the flow channel 4 are arranged adjacent to each other at intervals. The number of suspension keys 5 and flow channel 4 is 6-10, and preferably, the number of suspension keys 5 and flow channel 4 is 8.

[0042] The body 100 has an anti-rotation threaded hole 6 on its circumference, and the anti-rotation threaded hole 6 passes through the flow channel groove 4. The upper part of the hollow cavity 9 is provided with a sleeve hanger bearing shoulder 3, which is used to seat a 9-5 / 8” sleeve hanger 200.

[0043] The upper end of the suspension key 5 is provided with a 40-50° inclined surface, and the lower end of the suspension key 5 is a vertical surface. Preferably, the slope angle of the inclined surface of the suspension key 5 is 45°.

[0044] The bearing shoulder 3 of the sleeve hanger is an inclined surface with a slope angle of 55-65°. Preferably, the slope angle of the inclined surface of the bearing shoulder 3 of the sleeve hanger is 60°.

[0045] Continue reading Figure 1 The upper part of the hollow cavity 9 is also provided with a smooth support surface 7 and a guide slope 8. The smooth support surface 7 is located above the bearing shoulder 3 of the sleeve hanger, and the guide slope 8 is located above the smooth support surface 7.

[0046] The guide slope 8 includes a first slope 10-1 and a second slope 10-2. The first slope 10-1 is located above the second slope 10-2. The second slope 10-2 is connected to the smoothing support surface 7. The slope of the second slope 10-2 is greater than the slope of the first slope 10-1.

[0047] The slope angle of the first inclined plane 10-1 is 20-25°, preferably 23°.

[0048] The slope angle of the second inclined plane 10-2 is 40-50°, preferably 45°.

[0049] See Figure 3 , Figure 4 and Figure 5Before placing the 9-5 / 8” casing hanger 200 seat into the main body 100, the lifting key of the 9-5 / 8” casing hanger 200 needs to be aligned with the flow channel groove 4 of the main body 100. After alignment, the 9-5 / 8” casing hanger 200 is introduced into the smooth support face 7 through the guide ramp 8 and seated on the casing hanger bearing shoulder 3. After the seat is placed, the angle of the 9-5 / 8” casing hanger 200 is rotated, and the anti-rotation screw 400 is installed into the anti-rotation threaded hole 6. The anti-rotation screw 400 is rotated until the bottom of the anti-rotation screw 400 contacts the flow channel groove 4. After the anti-rotation screw 400 is installed, the 9-5 / 8” casing hanger 200 cannot rotate relative to the device 100 or move axially. Finally, the connected 9-5 / 8” casing hanger 200 and the device 100 are placed together into the high-pressure wellhead 300. At this time, the knurled bearing shoulder seat of the device 100 is placed into the inner hole of the high-pressure wellhead.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An apparatus for replacing the 13-3 / 8" casing hanger installation position function, characterized by, The device includes a body, a knurled support shoulder, a pressure relief hole, a sleeve hanger support shoulder, a flow channel groove, a suspension key, and an anti-rotation threaded hole. The body has a hollow cavity. The lower part of the body has the knurled support shoulder and the pressure relief hole. The pressure relief hole is located below the knurled support shoulder. The inner wall of the hollow cavity has the suspension key and the flow channel groove, which are arranged adjacent to each other at intervals. The anti-rotation threaded hole is located on the circumference of the body and penetrates the flow channel groove. The upper part of the hollow cavity has the sleeve hanger support shoulder, which is used to seat a 9-5 / 8” sleeve hanger. The upper part of the hollow cavity is also provided with a smooth support surface and a guide slope. The smooth support surface is located above the bearing shoulder of the sleeve hanger, and the guide slope is located above the smooth support surface. Before placing the 9-5 / 8” casing hanger into the main body, the lifting key of the 9-5 / 8” casing hanger needs to be aligned with the flow channel groove of the main body. After alignment, the 9-5 / 8” casing hanger is introduced into the smooth support face through the guide ramp and placed on the casing hanger bearing shoulder. After placement, the angle of the 9-5 / 8” casing hanger is rotated to install the anti-rotation screw into the anti-rotation threaded hole, and rotated until the bottom of the anti-rotation screw contacts the flow channel groove. After the anti-rotation screw is installed, the 9-5 / 8” casing hanger cannot rotate relative to the device or move axially. Finally, the connected 9-5 / 8” casing hanger and the device are placed together into the high-pressure wellhead. At this time, the bearing knurled shoulder seat of the device is placed into the inner hole of the high-pressure wellhead.

2. The device to replace the function of a 13-3 / 8" casing hanger installation position as claimed in claim 1, wherein, The guide slope includes a first slope and a second slope. The first slope is disposed above the second slope, and the second slope is connected to the smoothing support surface. The slope of the second slope is greater than the slope of the first slope.

3. The device to replace the 13-3 / 8" casing hanger installation position function according to claim 2, characterized in that, The slope angle of the first inclined plane is 20-25°, and the slope angle of the second inclined plane is 40-50°.

4. The device to replace the 13-3 / 8" casing hanger installation position function according to any one of claims 1 to 3, characterized in that, The bearing knurled shoulder is provided with a third inclined surface, the slope angle of the third inclined surface is 55-65°, and the third inclined surface is provided with grid knurling.

5. The device to replace the 13-3 / 8" casing hanger installation position function according to any one of claims 1 to 3, characterized in that, The bearing shoulder of the sleeve is an inclined surface with a slope angle of 55-65°.

6. The device to replace the 13-3 / 8" casing hanger installation position function according to any one of claims 1 to 3, characterized in that, The upper end of the suspension key has a 40-50° slope.

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