Blowout preventer for downhole operation in gas field development

Abstract

The utility model discloses a blowout preventer for gas field development downhole operation, which comprises a base body, a round through hole is formed in the upper surface of the base body, square grooves are symmetrically formed in the through hole, round holes are symmetrically formed in the side surface of the base body in a penetrating manner, movable grooves are symmetrically formed in the round holes, the round holes are communicated with the square grooves, and the movable grooves are communicated with the square grooves. Shaft sleeves are symmetrically and fixedly connected to the two side faces of the base body, the inner diameter of the shaft sleeves is concentric with the inner diameter of the round hole, threaded sleeves are fixedly connected to the side faces of the two shaft sleeves, threaded rods are connected into the threaded sleeves in a threaded mode, rotary knobs are fixedly connected to the side faces of the threaded rods, and mounting blocks are fixedly connected to the side faces of the other two shaft sleeves. And a movable rod is slidably connected to the side surface of the mounting block in a penetrating manner. The blowout preventer has the advantages that the threaded rod and the threaded sleeve are used in cooperation, if the blowout preventer cannot be closed when a remote control device breaks down, the blowout preventer can be manually controlled to be normally closed, a wellhead is rapidly closed through the blowout preventer, and blowout accidents are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of gas field development, in particular to a blowout preventer used for downhole operation in gas field development. Background Art

[0002] With the development of modern society, various types of oil and gas resources have been exploited on a large scale. In order to ensure the safety of oil and gas exploitation, downhole blowout preventers are required in oil and gas exploitation. At the downhole operation site of the petroleum industry, the blowout preventer is a device that prevents the well fluid from spraying out of the well. The quick connector of the blowout preventer is a necessary facility for connecting the blowout preventer with other equipment.

[0003] In the prior art, general gas field blowout preventers are operated by remotely controlling the blowout preventer through electrical devices. If an unexpected situation occurs during operation and causes the electrical device to fail, the blowout preventer cannot be closed, resulting in a blowout accident, causing huge economic losses and ecological damage to the society. Utility Model Content

[0004] The utility model aims to solve the problems described in the above background technology and proposes a blowout preventer for downhole operation in gas field development.

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

[0006] A blowout preventer for downhole operation in gas field development, comprising a base, a circular through hole is provided on the upper surface of the base, a square groove is symmetrically provided in the through hole, a circular hole is symmetrically provided through the side surface of the base, a movable groove is symmetrically provided in the circular hole, the circular hole is connected with the square groove, the two sides of the base are symmetrically fixedly connected with shaft sleeves, the inner diameter of the shaft sleeve is concentric with the inner diameter of the circular hole, two sides of the shaft sleeves are fixedly connected with threaded sleeves, the inner diameter of the threaded sleeves is concentric with the inner diameter of the shaft sleeves, a screw is connected with the inner thread of the threaded sleeves, a knob is fixedly connected with the side surface of the screw, and the sides of the other two shaft sleeves are fixedly connected with the inner thread of the threaded sleeves. A mounting block is fixedly connected, a movable rod is slidably connected to the side surface of the mounting block, the outer diameter of the movable rod is concentric with the inner diameter of the sleeve, the side surface of the movable rod is fixedly connected to the output end of the electric hydraulic column, the bottom of the electric hydraulic column is fixedly connected to a fixing plate, a plurality of support rods are fixedly connected to the side surface of the fixing plate, one end of the plurality of support rods is fixedly connected to the side surface of the mounting block, a flange is fixedly connected at the center of the upper and lower surfaces of the base, a sealing groove is provided on the upper surface of the flange, a plurality of connecting holes are provided on the upper surface of the flange, and the inner diameter of the flange is concentric with the circular through hole.

[0007] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: a sliding rod is slidably connected in the circular hole, a baffle is fixedly connected to the arc surface of the sliding rod, the baffle is located in the movable groove, a spring is slidably connected to the annular outer surface of the sliding rod, the spring is located in the movable groove, one end of the spring is fixedly connected to the side of the baffle, one end of the sliding rod is fixedly connected to a spray prevention head, and the spray prevention head is slidably connected in the square groove.

[0008] The utility model has the advantages that, by setting the coordinated use of the screw rod and the threaded sleeve, if the remote control device fails and the blowout preventer cannot be closed, the blowout preventer can be manually controlled to close normally, so that the blowout preventer quickly closes the wellhead and prevents the occurrence of blowout accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of a blowout preventer for downhole operations in gas field development proposed by the utility model;

[0010] Figure 2 This is a schematic diagram of the cross-sectional structure of a base of a blowout preventer for downhole operation in gas field development proposed by the utility model;

[0011] Figure 3 The utility model is a schematic cross-sectional structure diagram of a blowout preventer for downhole operation in gas field development.

[0012] In the figure: 1 base, 2 circular through hole, 3 square groove, 4 movable groove, 5 circular hole, 6 sleeve, 7 threaded sleeve, 8 screw, 9 knob, 10 slide bar, 11 baffle, 12 spring, 13 spray head, 14 mounting block, 15 movable rod, 16 electric hydraulic column, 17 fixing plate, 18 support rod, 19 flange, 20 sealing groove, 21 connecting hole. DETAILED DESCRIPTION

[0013] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Reference Figure 1-Figure 3As shown, a blowout preventer for downhole operation in gas field development comprises a base body 1, a circular through hole 2 is provided on the upper surface of the base body 1, a square groove 3 is symmetrically provided in the through hole 2, a circular hole 5 is symmetrically provided through the side of the base body 1, a movable groove 4 is symmetrically provided in the circular hole 5, the circular hole 5 is communicated with the square groove 3, the side of the other two shaft sleeves 6 is fixedly connected with a mounting block 14, the side of the mounting block 14 is slidably connected with a movable rod 15, the outer diameter of the movable rod 15 is concentric with the inner diameter of the shaft sleeve 6, the side of the movable rod 15 is fixedly connected with the output end of an electric hydraulic column 16, the bottom of the electric hydraulic column 16 is fixedly connected with a fixing plate 17, the side of the fixing plate 17 is fixedly connected with a plurality of support rods 18, and one of the plurality of support rods 18 The end is fixedly connected to the side of the mounting block 14. When the remote-controlled electric hydraulic column 16 works, the electric hydraulic column will drive the movable rod 15 to slide in the groove, thereby pushing the sliding rod 10 to move. The sliding rod 10 will drive the blowout preventer 13 to move, thereby electrically realizing the opening and closing of the blowout preventer. A flange 19 is fixedly connected to the center of the upper and lower surfaces of the base 1. A sealing groove 20 is provided on the upper surface of the flange 19. A plurality of connecting holes 21 are provided on the upper surface of the flange 19. The inner diameter of the flange 19 is concentric with the circular through hole 2. The connecting pipe is connected through the connecting hole 21 on the flange 19 for oil and gas transmission. The sealing groove 20 on the upper surface of the flange 19 is used to place a sealing ring to prevent oil and gas leakage.

[0015] The two sides of the base 1 are symmetrically fixedly connected with shaft sleeves 6, and the inner diameter of the shaft sleeve 6 is concentric with the inner diameter of the circular hole 5. The sides of the two shaft sleeves 6 are fixedly connected with threaded sleeves 7, and the inner threads of the threaded sleeves 7 are connected with screws 8. The sides of the screws 8 are fixedly connected with knobs 9, and the inner diameter of the threaded sleeves 7 is concentric with the inner diameter of the shaft sleeve 6. A slide rod 10 is slidably connected in the circular hole 5, and a baffle 11 is fixedly connected to the arc surface of the slide rod 10, and the baffle 11 is located in the movable groove 4. A spring 12 is slidably connected to the annular outer surface of the slide rod 10, and the spring 12 is located in the movable groove 4. One end of the spring is fixedly connected to the side of the baffle 11, and one end of the slide rod 10 is fixedly connected to a spray prevention head 13, which is slidably connected in the square groove 3. When the knob 9 is manually turned, the rotation The button 9 drives the threaded rod 8 to rotate. Since the threaded rod 8 and the threaded sleeve 7 are threadedly connected, the threaded rod 8 moves horizontally while rotating. When the threaded rod 8 moves horizontally, it will push the sliding rod 10 to move, and the sliding rod 10 drives the blowout preventer 13 to move. Since the sliding rod 10 is fixedly and slidably connected with the spring 12, when the sliding rod 10 moves, the spring 12 will enter a compressed state. When the threaded rod 8 is reset, the sliding rod 10 will also return to its original position under the action of the spring 12, thereby manually realizing the rapid closing and opening of the blowout preventer. By setting the coordinated use of the screw rod and the threaded sleeve, if the remote control device fails and the blowout preventer cannot be closed, the blowout preventer can be manually controlled to close normally, so that the blowout preventer can quickly close the wellhead to prevent the occurrence of blowout accidents.

[0016] When the electrical device of the remote control is damaged, the knob 9 is manually turned, and the knob 9 drives the threaded rod 8 to rotate. Since the threaded rod 8 and the threaded sleeve 7 are threadedly connected, the threaded rod 8 moves horizontally while rotating. When the threaded rod 8 moves horizontally, it will push the sliding rod 10 to move, and the sliding rod 10 drives the blowout preventer 13 to move. Since the sliding rod 10 is fixedly and slidably connected with the spring 12, when the sliding rod 10 moves, the spring 12 will enter a compressed state. When the threaded rod 8 is reset, the sliding rod 10 will also return to its original position under the action of the spring 12, thereby manually realizing the rapid closing and opening of the blowout preventer. By setting the coordinated use of the screw rod and the threaded sleeve, if the remote control device fails and the blowout preventer cannot be closed, the blowout preventer can be manually controlled to close normally, so that the blowout preventer can quickly close the wellhead to prevent the occurrence of blowout accidents.

Claims

1. A blowout preventer for downhole operation in gas field development, comprising a base body (1), characterized in that: The upper surface of the base body (1) is provided with a circular through hole (2), and a square groove (3) is symmetrically provided in the through hole (2). A circular hole (5) is symmetrically provided through the side surface of the base body (1), and a movable groove (4) is symmetrically provided in the circular hole (5). The circular hole (5) is connected to the square groove (3). The two side surfaces of the base body (1) are symmetrically fixedly connected with shaft sleeves (6), and the inner diameter of the shaft sleeve (6) is concentric with the inner diameter of the circular hole (5). The side surfaces of two shaft sleeves (6) are fixedly connected with threaded sleeves (7), and the inner diameter of the threaded sleeves (7) is concentric with the inner diameter of the shaft sleeve (6). The inner thread of the threaded sleeve (7) is connected with a screw rod (8), and the side surface of the screw rod (8) is fixedly connected with a knob (9). The side surfaces of the other two shaft sleeves (6) are fixedly connected with mounting blocks (14). A movable rod (15) is slidably connected to the side of the block (14), the outer diameter of the movable rod (15) is concentric with the inner diameter of the shaft sleeve (6), the side of the movable rod (15) is fixedly connected to the output end of the electric hydraulic column (16), the bottom of the electric hydraulic column (16) is fixedly connected to a fixed plate (17), the side of the fixed plate (17) is fixedly connected to a plurality of support rods (18), one end of the plurality of support rods (18) is fixedly connected to the side of the mounting block (14), the upper surface and the lower surface of the base (1) are fixedly connected to a flange (19) at the center, the upper surface of the flange (19) is provided with a sealing groove (20), the upper surface of the flange (19) is provided with a plurality of connection holes (21), and the inner diameter of the flange (19) is concentric with the circular through hole (2).

2. A blowout preventer for downhole operation in gas field development according to claim 1, characterized in that: A slide rod (10) is slidably connected in the circular hole (5), a baffle (11) is fixedly connected on the arc surface of the slide rod (10), the baffle (11) is located in the movable groove (4), a spring (12) is slidably connected on the annular outer surface of the slide rod (10), the spring (12) is located in the movable groove (4), one end of the spring is fixedly connected to the side of the baffle (11), and one end of the slide rod (10) is fixedly connected to a spray prevention head (13), the spray prevention head is slidably connected in the square groove (3).

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