CN220958463U

CN220958463U - Baking device for inner cavity of blowout preventer for offshore oil drilling

Info

Publication number: CN220958463U
Application number: CN202322965984.4U
Authority: CN
Inventors: 陈忠华; 周德来; 黄小军; 瞿文明; 吴宏俊; 段茂增
Original assignee: Shanghai Driling Branch Of Sinopec Offshore Oilfield Services Co; Sinopec Oilfield Service Corp
Current assignee: Shanghai Driling Branch Of Sinopec Offshore Oilfield Services Co; Sinopec Oilfield Service Corp
Priority date: 2023-11-02
Filing date: 2023-11-02
Publication date: 2024-05-14
Anticipated expiration: 2033-11-02

Abstract

The application provides a baking device for an inner cavity of a blowout preventer for offshore oil drilling, which comprises a hollow rod, a righting disc, a baking gun and a gas pipe. The hollow rod extends a predetermined length in a straight direction. The centralizing disc is sleeved and arranged at the lower end of the hollow rod, and the outer diameter of the centralizing disc is smaller than the preset value of the inner diameter of the blowout preventer. The baking gun is mounted on the centralizing plate or on the hollow rod, and comprises a gun head, and an opening of the gun head faces to one side away from the hollow rod. The gas transmission pipe extends into the hollow rod from top to bottom, passes through the lower end of the hollow rod and then is communicated with the baking gun, and the gas transmission pipe is used for transmitting combustible gas and oxygen for baking. According to the technical scheme, the sealing steel ring at the joint of the universal blowout preventer and the ram blowout preventer can be baked circumferentially, and further looseness occurs at the sealing steel ring under the action of thermal expansion and cold contraction, so that the universal blowout preventer and the ram blowout preventer can be conveniently disconnected.

Description

Baking device for inner cavity of blowout preventer for offshore oil drilling

Technical Field

The application relates to the technical field of marine drilling, in particular to a baking device for an inner cavity of a blowout preventer for marine petroleum drilling.

Background

The blowout preventer is used for closing a wellhead in the operation processes of oil testing, well repairing, well completion and the like, so as to prevent blowout accidents, combines the full sealing function and the half sealing function into a whole, has the characteristics of simple structure, easy operation, high pressure resistance and the like, and is a safety sealing wellhead device for preventing blowout commonly used in oil fields.

In some offshore oil semi-submersible drilling platforms, when workers withdraw underwater blowout preventer groups, the failure that the universal blowout preventer and the ram blowout preventer cannot be separated occurs, and the universal blowout preventer and the ram blowout preventer cannot be separated by means of overpull, high-rotation-speed vibration and knocking by using a centralizer and the like. In addition, after the underground treatment is safe, the working personnel salvage the universal blowout preventer and the ram blowout preventer, and then repeatedly use methods such as super-pulling, vibration knocking and the like, which is not helpful. Through researches, the problem that the universal blowout preventer and the ram blowout preventer cannot be separated due to deformation of a sealing steel ring for connecting the universal blowout preventer and the ram blowout preventer, normal maintenance is affected, replacement efficiency is affected, and certain potential safety hazards are brought.

Disclosure of utility model

The application aims to provide an inner cavity baking device of an offshore oil drilling blowout preventer, which can be used for circumferentially baking a sealing steel ring at the joint of a universal blowout preventer and a ram blowout preventer, and further loosening the sealing steel ring under the action of thermal expansion and cold contraction so as to facilitate the detachment of the universal blowout preventer and the ram blowout preventer.

The application provides a baking device for an inner cavity of a blowout preventer for offshore oil drilling, which comprises a hollow rod, a righting disc, a baking gun and a gas pipe.

Wherein the hollow bar extends a predetermined length in a straight direction. The centralizing disc is sleeved and arranged at the lower end of the hollow rod, and the outer diameter of the centralizing disc is smaller than the preset value of the inner diameter of the blowout preventer. The baking gun is mounted on the centralizing plate or on the hollow rod, and comprises a gun head, and an opening of the gun head faces to one side away from the hollow rod. The gas transmission pipe extends into the hollow rod from top to bottom, passes through the lower end of the hollow rod and then is communicated with the baking gun, and the gas transmission pipe is used for transmitting combustible gas and oxygen for baking.

In one embodiment, the baking device of the inner cavity of the blowout preventer for offshore oil drilling further comprises a clamp, one end of the clamp is arranged at the lower end of the hollow rod and is close to the upper part of the centralizing disc, and the other end of the clamp is provided with the baking gun; the right disc is provided with a through hole penetrating up and down, and the lower end of the baking gun is inserted into the through hole; the air pipe penetrates out of the lower end of the hollow rod and is communicated with the lower end of the baking gun through the through hole.

In one embodiment, the number of the baking guns is two or more, and a plurality of the baking guns are uniformly distributed around the circumference of the central axis of the hollow shaft.

In one embodiment, the righting disc is removably sleeved on the lower end of the hollow rod.

In one embodiment, the center of the righting disc is provided with a polygonal through hole; the lower end of the hollow rod is provided with a step structure, and the lower end of the step structure is provided with a mounting section and a locking section in sequence; the section appearance of the mounting section is the same as the shape of the polygonal through hole, and the length of the mounting section is smaller than the thickness of the centralizing disc; the locking section is provided with external threads and extends from the mounting section to the lower end part of the hollow rod; the polygonal through hole of the centralizing disc is sleeved on the mounting section; and a tightening nut is arranged on the locking section in a threaded manner so as to tightly prop the righting disc on the step structure.

In one embodiment, graduation marks are provided along the surface of the hollow shaft in the direction of extension.

In one embodiment, the marine oil drilling blowout preventer cavity baking apparatus further comprises a rotating apparatus for detachably connecting with the upper end of the hollow rod, the rotating apparatus being for driving the hollow rod to rotate.

In one embodiment, the marine oil drilling blowout preventer cavity baking apparatus further comprises a lifting device for detachably connecting with the upper end of the hollow rod, and the lifting device is used for lifting or lowering the hollow rod.

In one embodiment, the baking device of the inner cavity of the blowout preventer for offshore oil drilling further comprises a control valve, wherein the control valve is arranged at one end of the gas pipe, which is transmitted out from the upper end of the hollow rod, so as to adjust the flow in the gas pipe.

Compared with the prior art, the application has the beneficial effects that at least:

When the baking device for the inner cavity of the blowout preventer of the petroleum drilling well is used, the combination of the universal blowout preventer and the ram blowout preventer is firstly fished out of water. The lower end of the hollow rod and the centralizer are then inserted into the bore intermediate the universal blowout preventer and ram blowout preventer, and the tip of the baking gun is aligned to the height of the seal ring. The hollow rod is rotated, flame is sprayed out of the gun head of the baking gun, baking of the inner wall of the blowout preventer corresponding to the sealing steel ring is achieved, baking is stopped after baking is kept for a period of time, certain looseness occurs at the joint of the sealing steel ring, the universal blowout preventer and the flashboard blowout preventer through the principle of thermal expansion and cold contraction, and then an ultra-pulling acting force is applied to the universal blowout preventer and the flashboard blowout preventer, so that the universal blowout preventer and the flashboard blowout preventer can be pulled open relatively easily, the fault that the universal blowout preventer and the flashboard blowout preventer cannot be pulled open is solved satisfactorily, subsequent maintenance is facilitated, piece replacement efficiency is improved, and potential safety hazards in some operations can be reduced correspondingly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a marine oil drilling blowout preventer inner cavity baking apparatus according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a marine oil drilling blowout preventer inner cavity baking apparatus according to an embodiment of the present application;

FIG. 3 is an enlarged view of a partial structure according to the position A in FIG. 2;

Fig. 4 is a schematic structural view showing a baking apparatus having two baking guns according to an embodiment of the present application;

FIG. 5 is a schematic view showing a partial structure of a connection position of a centralizing disk and a lower end of a hollow disk according to an embodiment of the present application;

FIG. 6 is a schematic view of an exploded structure showing the connection location of the centralizing disk and the lower end of the hollow disk according to an embodiment of the present application;

Fig. 7 is a schematic view showing the composition of a baking apparatus having a control valve according to an embodiment of the present application.

In the figure: 10. a hollow rod; 11. scale marks; 20. centralizing the disc; 21. a through hole; 22. polygonal through holes; 30. a baking gun; 31. a gun head; 40. a gas pipe; 50. a clamp; 60. a step structure; 61. a mounting section; 62. a locking section; 63. tightening the nut; 70. a control valve; 100. a universal blowout preventer; 200. ram blowout preventer; 300. and (5) sealing the steel ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1, the present embodiment provides a baking apparatus for an inner cavity of a blowout preventer for offshore oil drilling, comprising:

a hollow bar 10 extending a predetermined length in a straight direction;

the centralizing disc 20 is sleeved at the lower end of the hollow rod 10, and the outer diameter of the centralizing disc 20 is smaller than the preset value of the inner diameter size of the blowout preventer;

A baking gun 30 mounted on the righting disc 20 or on the hollow bar 10, the baking gun 30 comprising a gun head 31, the opening of the gun head 31 facing away from the side of the hollow bar 10;

The gas pipe 40 extends into and passes through the hollow rod 10 from top to bottom, and is communicated with the baking gun 30 after extending out from the lower end of the hollow rod 10, and the gas pipe 40 is used for conveying combustible gas and oxygen for baking.

When the baking device for the inner cavity of the petroleum drilling blowout preventer of the embodiment is used, the combination of the universal blowout preventer and the ram blowout preventer is firstly fished out of water. Then, as shown in fig. 2 and 3, the lower end of the hollow rod 10 and the centering disc 20 are inserted into the hole between the universal blowout preventer 100 and the ram blowout preventer 200, and the gun head 31 of the baking gun 30 is aligned with the height of the seal ring 300. The hollow rod 10 is rotated, flame is sprayed out of the gun head 31 of the baking gun 30, baking of the inner wall of the blowout preventer corresponding to the sealing steel ring 300 is achieved, baking is stopped after baking is kept for a period of time, certain looseness occurs at the joint of the sealing steel ring 300 and the universal blowout preventer 100 and the flashboard blowout preventer 200 through the principle of thermal expansion and cold contraction, and then an overpull acting force is applied to the universal blowout preventer 100 and the flashboard blowout preventer 200, so that the universal blowout preventer 100 and the flashboard blowout preventer 200 can be pulled open relatively easily, the fault that the universal blowout preventer 100 and the flashboard blowout preventer 200 cannot be pulled open is solved satisfactorily, subsequent maintenance is facilitated, replacement efficiency is improved, and potential safety hazards in some operations can be reduced correspondingly.

Furthermore, the centralizer disk 20 serves at least two purposes, in that, in a first aspect, the weight of the centralizer disk 20 may keep the entire device as vertical as possible, and in a second aspect, the centralizer disk 20 may define the position of the firing gun 30 in the universal blowout preventer 100 and ram blowout preventer 200 to prevent the gun head 31 from plugging the gun head too close to the inner wall of the blowout preventer.

In this embodiment, as shown in fig. 1, the baking apparatus for the inner cavity of the blowout preventer for offshore oil drilling further comprises a collar 50, one end of the collar 50 is installed at the lower end of the hollow rod 10 and above the centering disc 20, and the other end of the collar 50 is installed with the baking gun 30. The righting disc 20 is provided with a through hole 21 penetrating up and down, and the lower end of the baking gun 30 is inserted into the through hole 21. The air pipe 40 is connected with the lower end of the baking gun 30 through the through hole 21 after penetrating out from the lower end of the hollow rod 10.

It should be noted that the through hole 21 may be used to mount and fix the lower end of the baking gun 30, and then the air pipe 40 is connected to the lower end of the baking gun 30. It is also possible that the lower end of the baking gun 30 is not installed in the through hole 21, and then the baking gun 30 is fixed using only the yoke 50.

In this embodiment, as shown in fig. 4, the number of the roasting guns 30 is two or more, and the plurality of roasting guns 30 are uniformly distributed around the circumference of the central axis of the hollow shaft 10. The plurality of baking guns 30 can shorten the overall heating time and improve the heating efficiency.

For example, the toasting device in fig. 4 has two toasting guns 30, and toasting is performed simultaneously to improve toasting efficiency.

In this embodiment, as shown in fig. 5, the righting disc 20 may be detachably fitted over the lower end of the hollow rod 10. The removable form of the centralizer disk 20 allows for replacement of the centralizer disk 20 with different outer diameters when facing blowout preventers of different inner diameters to extend the applicability.

In this embodiment, as shown in fig. 5 and 6, the center of the centralizing plate 20 may be provided with a polygonal through hole 22, the lower end of the hollow rod 10 is provided with a step structure 60, and the lower end of the step structure 60 is sequentially provided with a mounting section 61 and a locking section 62. The cross-sectional profile of the mounting section 61 is the same as the shape of the polygonal through-hole 22, and the length of the mounting section 61 is less than the thickness of the centralizing disk 20. The locking section 62 is provided with an external thread and it extends from the mounting section 61 to the lower end of the hollow rod 10. The polygonal through hole 22 of the centralizing plate 20 is sleeved on the mounting section 61; the locking section 62 is threadably mounted with a tightening nut 63 to tighten the centralizing plate 20 against the step structure 60.

In this embodiment, as shown in fig. 7, graduation marks 11 are provided on the surface along the extending direction of the hollow rod 10, and the depth of the hollow rod 10 extending into the universal blowout preventer 100 and the ram blowout preventer 200 can be seen through the graduation marks 11, so as to determine whether the gun head 31 of the baking gun 30 is aligned with the position of the seal ring 300.

In this embodiment, the baking device of the inner cavity of the blowout preventer for offshore oil drilling further comprises a rotating device, wherein the rotating device is detachably connected with the upper end of the hollow rod 10, and the rotating device is used for driving the hollow rod 10 to rotate.

In this embodiment, the baking device of the inner cavity of the blowout preventer for offshore oil drilling further comprises a lifting device, wherein the lifting device is detachably connected with the upper end of the hollow rod 10, and the lifting device is used for lifting or lowering the hollow rod 10.

The rotating device and the lifting device can be similar to a top drive device (with the functions of rotation and lifting) in drilling equipment. The rotating device and the lifting device can also be respectively and independently arranged, for example, the lifting device can be a linear guide rail module which is vertically arranged, and the rotating device can adopt a high-power rotating motor and is arranged on the displacement output end of the linear guide rail module.

In this embodiment, as shown in fig. 7, the baking apparatus for the inner cavity of the blowout preventer for offshore oil drilling may further comprise a control valve 70, wherein the control valve 70 is installed at one end of the gas pipe 40 which is transferred from the upper end of the hollow rod 10, so as to adjust the flow rate in the gas pipe 40, thereby changing the fire intensity of the baking gun 30.

The combustible gas used in the baking gun 30 may be acetylene.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An apparatus for baking an inner cavity of a blowout preventer for offshore oil drilling, comprising:

A hollow rod (10) extending a predetermined length in a straight direction;

The centralizing disc (20) is sleeved at the lower end of the hollow rod (10), and the outer diameter of the centralizing disc (20) is smaller than the preset value of the inner diameter size of the blowout preventer;

A baking gun (30) mounted on the righting disc (20) or on the hollow rod (10), the baking gun (30) comprising a gun head (31), the opening of the gun head (31) facing towards the side facing away from the hollow rod (10);

The gas pipe (40) stretches into the hollow rod (10) from top to bottom, stretches out from the lower end of the hollow rod (10) and then is communicated with the baking gun (30), and the gas pipe (40) is used for conveying combustible gas and oxygen for baking.

2. The apparatus as claimed in claim 1, further comprising a collar (50), one end of the collar (50) being mounted at the lower end of the hollow rod (10) and being located above the righting disc (20), the other end of the collar (50) being mounted with the baking gun (30);

The centering disc (20) is provided with a through hole (21) penetrating up and down, and the lower end of the baking gun (30) is inserted into the through hole (21);

The air pipe (40) penetrates out of the lower end of the hollow rod (10) and is communicated with the lower end of the baking gun (30) through the through hole (21).

3. The baking apparatus for the inner cavity of the blowout preventer for offshore oil drilling according to claim 1, wherein the number of the baking guns (30) is two or more, and a plurality of the baking guns (30) are uniformly distributed around the circumference of the central axis of the hollow rod (10).

4. The baking device for the inner cavity of the blowout preventer of the offshore petroleum drilling well according to claim 1, wherein the righting disc (20) is detachably sleeved and installed at the lower end of the hollow rod (10).

5. The marine oil drilling blowout preventer inner cavity baking apparatus according to claim 4, wherein the centralising disc (20) is provided with a polygonal through hole (22);

The lower end of the hollow rod (10) is provided with a step structure (60), and the lower end of the step structure (60) is provided with a mounting section (61) and a locking section (62) in sequence;

The cross-sectional shape of the mounting section (61) is the same as the shape of the polygonal through hole (22), and the length of the mounting section (61) is smaller than the thickness of the centralizing disk (20);

The locking section (62) is provided with an external thread and extends from the mounting section (61) to the lower end of the hollow rod (10);

The polygonal through hole (22) of the centralizing disc (20) is sleeved on the mounting section (61); a tightening nut (63) is mounted on the locking section (62) in a threaded manner so as to tightly press the righting disc (20) against the step structure (60).

6. The baking apparatus of the inner cavity of a blowout preventer for offshore oil drilling according to claim 1, wherein graduation marks (11) are provided along the surface of the hollow rod (10) in the extending direction.

7. The marine oil drilling blowout preventer inner cavity baking apparatus according to claim 1, further comprising a rotation means for detachably connecting with the upper end of the hollow rod (10), the rotation means being for driving the hollow rod (10) in rotation.

8. The marine oil drilling blowout preventer inner cavity firing apparatus according to claim 7, further comprising a lifting device for releasable connection with the upper end of the hollow rod (10), the lifting device being for lifting or lowering the hollow rod (10).

9. The marine oil well blowout preventer cavity firing apparatus of any one of claims 1 to 8, further comprising a control valve (70), the control valve (70) being mounted at an end of the gas line (40) that exits the upper end of the hollow stem (10) to regulate the amount of flow within the gas line (40).