A high-efficiency sealing blowout preventer for oil field gas production

Abstract

The utility model relates to the technical field related to efficient sealing blowout preventers, specifically, an efficient sealing blowout preventer for oilfield gas production, including an oilfield gas production pipe, a fixing bolt, an oilfield gas production flange pipe, and an installation assembly, wherein a fixing bolt is installed at a threaded connection on the oilfield gas production pipe, an oilfield gas production flange pipe is movably installed at the top of the oilfield gas production pipe, and a fixing bolt and an oilfield gas production flange pipe are arranged at a fixed position on the installation assembly. In the utility model, the oilfield gas production flange pipe is sealed and reinforced through a flange wellhead and a rotatable sealing plate, and after the efficient sealing blowout preventer performs oilfield gas production sealing, the user manually twists the rotatable sealing plate to connect and seal the oilfield gas production flange pipe, thereby avoiding leakage of residual gas through the oilfield gas production flange pipe and the wellhead where the pipe string is connected to the wellhead, preventing residual overflow and gas blowout, and preventing the efficient sealing blowout preventer from being damaged due to gas leakage.

Description

Technical Field

[0001] The utility model relates to the technical field related to high-efficiency sealing blowout preventers, in particular to a high-efficiency sealing blowout preventer used for oil field gas production. Background Art

[0002] When there is a pipe string in the well, the high-efficiency sealing blowout preventer can use a rubber core to seal the annular space formed by the pipe string and the wellhead. When the well is empty, the wellhead can be completely sealed. During drilling, milling, casing grinding, logging and salvaging of fallen objects in the well, if overflow or blowout occurs, the space formed by the square drill rod, cable, wire rope and tools for handling accidents and the wellhead can be sealed. With the cooperation of the pressure reducing and regulating valve or a small energy accumulator, the 18° buckleless butt-welded pipe string joint can be forcibly lifted and lowered. In case of severe overflow or blowout, it is used to cooperate with the gate blowout preventer and the throttling manifold to achieve soft well closing.

[0003] The existing high-efficiency sealing blowout preventer can only seal the tubing in the well. The wellhead where the tubing is connected to the wellhead is prone to residual overflow and gas blowout, which can cause damage to the high-efficiency sealing blowout preventer and directly affect its service life. Utility Model Content

[0004] The utility model aims to provide a high-efficiency sealing blowout preventer for oil field gas production, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-efficiency sealed blowout preventer for oilfield gas production, comprising an oilfield gas production pipe, a fixing bolt, an oilfield gas production flange pipe and an installation assembly, wherein a fixing bolt is installed at a threaded connection on the oilfield gas production pipe, an oilfield gas production flange pipe is movably installed at the top of the oilfield gas production pipe, a fixing bolt and an oilfield gas production flange pipe are arranged at a fixed position on the installation assembly, and further comprising,

[0007] A wellhead sealing assembly is installed on the oilfield gas production flange pipe;

[0008] A connecting sealing assembly is arranged on the oilfield gas production flange pipe;

[0009] Among them, reinforcement holes are arranged at the threads on the oilfield gas production flange pipe, a manual valve is movably installed on one side of the oilfield gas production flange pipe, connecting pipes are installed on both sides of the oilfield gas production pipe, a single gate plate group is arranged at the welding point on the connecting pipe, a lower sealing pipe is fixed at the bottom end of the oilfield gas production pipe, and a pneumatic pipe end is installed on one side of the lower sealing pipe.

[0010] The highly efficient sealing blowout preventer for oilfield gas production as described above: the oilfield gas production pipe is connected to the single gate assembly through a connecting pipe.

[0011] The highly efficient sealing blowout preventer for oilfield gas production as described above: the oilfield gas production pipe is connected to the lower sealing pipe, and the lower sealing pipe is pneumatically sealed through the pneumatic pipe end.

[0012] The highly efficient sealing blowout preventer for oilfield gas production as described above: the wellhead sealing assembly comprises a flange wellhead movably mounted inside the oilfield gas production flange pipe, and a rotatable sealing plate is provided at the movable part of the manual valve.

[0013] The highly efficient sealing blowout preventer for oilfield gas production as described above: the flange wellhead is sealed by rotating a rotatable sealing plate through a manual valve.

[0014] The highly efficient sealed blowout preventer for oilfield gas production as described above: the connection sealing assembly comprises a pneumatic lifting rod movably mounted inside the lower sealing pipe, and a sealing sleeve is fixed to the bottom end of the pneumatic lifting rod.

[0015] The highly efficient sealing blowout preventer for oilfield gas production as described above: the sealing sleeve is lifted and lowered by a pneumatic lifting rod and sealed to the inside of the lower sealing pipe.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the oilfield gas production flange pipe is sealed and reinforced through the flange wellhead and the rotatable sealing plate. After the high-efficiency sealing blowout preventer performs oilfield gas production sealing, the user manually twists the rotatable sealing plate to connect and seal the oilfield gas production flange pipe, thereby avoiding leakage of residual gas through the oilfield gas production flange pipe and the wellhead where the pipe string is connected to the wellhead, preventing residual overflow and gas blowout, and preventing the high-efficiency sealing blowout preventer from being damaged due to gas leakage.

[0017] Start the pneumatic equipment connected to the pneumatic pipe end. Under the action of its air pressure, the pneumatic lifting rod and the sealing sleeve are lifted and sealed inside the lower sealing pipe. The pneumatic lifting rod and the sealing sleeve are pneumatically locked inside the lower sealing pipe to prevent residual gas from entering the lower sealing pipe. Then start the high-efficiency sealing blowout preventer to seal the annular space between the pipe string and the wellhead with the rubber core. When the well is empty, the wellhead can be completely sealed. The pneumatic lifting rod and the sealing sleeve play a role in preventing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the wellhead sealing assembly of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the connection sealing component of the utility model.

[0021] In the figure: 1. Oilfield gas production pipe; 2. Fixing bolt; 3. Oilfield gas production flange pipe; 4. Reinforcement hole; 5. Connecting pipe; 6. Single gate assembly; 7. Manual valve; 8. Lower sealing pipe; 9. Pneumatic pipe end; 10. Flange wellhead; 11. Rotatable sealing plate; 12. Pneumatic lifting rod; 13. Sealing sleeve. DETAILED DESCRIPTION

[0022] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0023] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0024] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0025] See also Figures 1 to 3 , a high-efficiency sealing blowout preventer for oilfield gas production is proposed, including an oilfield gas production pipe 1, a fixing bolt 2, an oilfield gas production flange pipe 3 and an installation component.

[0026] A fixing bolt 2 is installed at the threaded connection of the oilfield gas production pipe 1, and an oilfield gas production flange pipe 3 is movably installed at the top of the oilfield gas production pipe 1. The fixing bolt 2 and the oilfield gas production flange pipe 3 are arranged at the fixing part of the installation assembly, and the wellhead sealing assembly is installed on the oilfield gas production flange pipe 3; the connection sealing assembly is arranged on the oilfield gas production flange pipe 3;

[0027] The oilfield gas production pipe 1 is movably installed at the oilfield gas production wellhead, so that the fixing bolts 2 are distributed and penetrated on the oilfield gas production pipe 1 for fixed installation, and then the oilfield gas production flange pipe 3 on the oilfield gas production pipe 1 is sealed and connected to the oilfield gas production wellhead;

[0028] Among them, a reinforcement hole 4 is arranged at the thread on the oilfield gas production flange pipe 3, a manual valve 7 is movably installed on one side of the oilfield gas production flange pipe 3, connecting pipes 5 are installed on both sides of the oilfield gas production pipe 1, a single gate group 6 is arranged at the welding point on the connecting pipe 5, a lower sealing pipe 8 is fixed at the bottom end of the oilfield gas production pipe 1, and a pneumatic pipe end 9 is installed on one side of the lower sealing pipe 8.

[0029] In this embodiment, the reinforcement holes 4 are opened around the top of the oilfield gas production flange pipe 3 to facilitate the docking installation of the oilfield gas production flange pipe 3, so that the connecting pipe 5 is fixedly connected to both sides of the oilfield gas production pipe 1, and the single gate group 6 is distributed and installed on the connecting pipe 5. The single gate group 6 is sealed by the blowout preventer, and then the lower sealing pipe 8 at the bottom end of the oilfield gas production pipe 1 is installed at the oilfield gas production wellhead, relying on the pneumatic pipe end 9 for pneumatic sealing.

[0030] Preferably, the oilfield gas production pipe 1 is connected to the single gate group 6 through the connecting pipe 5, and the single gate group 6 is installed inside the oilfield gas production pipe 1 and the connecting pipe 5. The single gate group 6 is sealed inside the oilfield gas production pipe 1 through the operation of the high-efficiency sealing blowout preventer, and the wellhead in the oilfield gas production pipe 1 can be sealed for gas production.

[0031] Preferably, the oilfield gas production pipe 1 is connected to the lower sealing pipe 8, and the lower sealing pipe 8 is pneumatically sealed through the pneumatic pipe end 9. The pneumatic pipe end 9 can be externally connected to pneumatic equipment, and the sealing component inside the lower sealing pipe 8 can be pushed by air pressure to seal the lower sealing pipe 8 at the wellhead.

[0032] Please refer to Figure 1 and Figure 2 In this embodiment, the wellhead sealing assembly includes a flange wellhead 10 movably installed inside the oilfield gas production flange pipe 3, and a rotatable sealing plate 11 is provided at the movable part of the manual valve 7. The manual valve 7 is movably installed on the rotatable sealing plate 11. The user manually twists the manual valve 7 to push the rotatable sealing plate 11 to rotate, and then the rotatable sealing plate 11 is movably installed inside the flange wellhead 10 for sealing.

[0033] Preferably, the flange wellhead 10 is sealed by rotating the rotatable sealing plate 11 through the manual valve 7, and the rotatable sealing plate 11 is manually twisted through the manual valve 7, and the rotatable seal is inside the flange wellhead 10. The oilfield gas production flange pipe 3 is sealed and reinforced through the flange wellhead 10 and the rotatable sealing plate 11. After the high-efficiency sealing blowout preventer seals the oilfield gas production, the user manually twists the rotatable sealing plate 11 to connect and seal the oilfield gas production flange pipe 3 to prevent residual gas from leaking through the oilfield gas production flange pipe 3.

[0034] Please refer to Figure 1 and Figure 3 In this embodiment, the connection sealing assembly includes a pneumatic lifting rod 12 movably installed inside the lower sealing tube 8, and a sealing sleeve 13 is fixed to the bottom end of the pneumatic lifting rod 12.

[0035] The pneumatic lifting rod 12 is movably installed inside the lower sealing tube 8, so that the sealing sleeve 13 is fixedly connected to the pneumatic lifting rod 12. The pneumatic tube end 9 can be externally connected to pneumatic equipment, and the sealing component inside the lower sealing tube 8 is pushed by air pressure. When the lower sealing tube 8 is sealed at the wellhead, the pneumatic lifting rod 12 and the sealing sleeve 13 are pushed up and down and sealed by the air pressure at the pneumatic tube end 9.

[0036] Preferably, the sealing sleeve 13 is lifted and lowered by the pneumatic lifting rod 12 and sealed to the inside of the lower sealing tube 8. Before the high-efficiency sealing blowout preventer is used for sealing, the pneumatic pipe end 9 can be started to connect to an external pneumatic device. Under the action of its air pressure, the pneumatic lifting rod 12 and the sealing sleeve 13 are lifted and lowered to seal the inside of the lower sealing tube 8.

[0037] As can be seen from the above, the connecting pipe 5 is fixedly connected to both sides of the oilfield gas production pipe 1, the single gate group 6 is distributed and installed on the connecting pipe 5, the single gate group 6 is sealed by the blowout preventer, and then the lower sealing pipe 8 at the bottom end of the oilfield gas production pipe 1 is installed at the oilfield gas production wellhead, relying on the pneumatic sealing of the pneumatic pipe end 9, the manual valve 7 is movably installed on the rotatable sealing plate 11, and the user manually twists the manual valve 7 to push the rotatable sealing plate 11 to rotate.

[0038] The sealing sleeve 13 is fixedly connected to the pneumatic lifting rod 12, and the pneumatic pipe end 9 can be connected to an external pneumatic device. The air pressure pushes the sealing component inside the lower sealing tube 8 to seal the lower sealing tube 8 at the wellhead. The pneumatic lifting rod 12 and the sealing sleeve 13 are lifted and sealed under the push of the air pressure at the pneumatic pipe end 9. The oilfield gas production flange pipe 3 is sealed and reinforced through the flange wellhead 10 and the rotatable sealing plate 11. After the high-efficiency sealing blowout preventer performs oilfield gas production sealing, the user manually twists the rotatable sealing plate 11 to connect and seal the oilfield gas production flange pipe 3.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-efficiency sealed blowout preventer for oilfield gas production, comprising an oilfield gas production pipe (1), a fixing bolt (2), an oilfield gas production flange pipe (3) and a mounting assembly, wherein a fixing bolt (2) is mounted on a threaded connection on the oilfield gas production pipe (1), an oilfield gas production flange pipe (3) is movably mounted on the top of the oilfield gas production pipe (1), and a fixing bolt (2) and an oilfield gas production flange pipe (3) are arranged at a fixed position on the mounting assembly, characterized in that: It also includes the following: A wellhead sealing assembly, mounted on the oilfield gas extraction flange pipe (3); A connecting sealing assembly is arranged on the oilfield gas extraction flange pipe (3); The threaded part of the oilfield gas extraction flange pipe (3) is provided with a reinforcement hole (4), a manual valve (7) is movably installed on one side of the oilfield gas extraction flange pipe (3), connecting pipes (5) are installed on both sides of the oilfield gas extraction pipe (1), a single gate plate group (6) is provided at the welding part of the connecting pipe (5), a lower sealing pipe (8) is fixed at the bottom end of the oilfield gas extraction pipe (1), and a pneumatic pipe end (9) is installed on one side of the lower sealing pipe (8).

2. The high-efficiency sealing blowout preventer for oilfield gas production according to claim 1, characterized in that: The oilfield gas production pipe (1) is connected to the single gate assembly (6) via a connecting pipe (5).

3. The high-efficiency sealing blowout preventer for oilfield gas production according to claim 1, characterized in that: The oilfield gas production pipe (1) is connected to a lower sealing pipe (8), and the lower sealing pipe (8) is pneumatically sealed via a pneumatic pipe end (9).

4. The high-efficiency sealing blowout preventer for oilfield gas production according to claim 1, characterized in that: The wellhead sealing assembly comprises a flange wellhead (10) movably mounted inside an oilfield gas extraction flange pipe (3), and a rotatable sealing plate (11) is provided at a movable position on the manual valve (7).

5. The high-efficiency sealing blowout preventer for oilfield gas production according to claim 4, characterized in that: The flange wellhead (10) is sealed by rotating a rotatable sealing plate (11) through a manual valve (7).

6. The high-efficiency sealing blowout preventer for oilfield gas production according to claim 1, characterized in that: The connection sealing assembly comprises a pneumatic lifting rod (12) movably mounted inside the lower sealing tube (8), and a sealing sleeve plate (13) is fixed to the bottom end of the pneumatic lifting rod (12).

7. The high-efficiency sealing blowout preventer for oilfield gas production according to claim 6, characterized in that: The sealing sleeve plate (13) is lifted and lowered by a pneumatic lifting rod (12) and sealed inside the lower sealing tube (8).

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