Blowout prevention equipment for coiled tubing in oil field

Abstract

The utility model provides coiled tubing blowout prevention equipment for an oil field, and belongs to the technical field of coiled tubing blowout prevention. The oil field coiled tubing blowout prevention equipment comprises a shell, a through pipe is arranged at the top of the shell, a detection mechanism comprises a vacuum pipe, a sealing sleeve, a vacuum pump and a pressure detector, the vacuum pipe is arranged in the through pipe in a sleeved mode, the bottom of the vacuum pipe is open, and an inner cavity of the vacuum pipe is communicated with an inner cavity of the through pipe. The detection mechanism is arranged, the positioning plate is inserted along the inlet and outlet groove, the vacuum pipe is rotated, the positioning plate is made to rotate in the positioning groove, the through pipe is connected with the positioning plate through the bolt, the vacuum pump is started, and air in the through pipe and the vacuum pipe is sucked away. The rubber core and the coiled tubing should be in a sealed state, at the moment, the pressure detector is started to detect the pressure in the vacuum tube, and therefore the sealing performance is detected.

Description

Technical Field

[0001] The utility model relates to the technical field of coiled tubing blowout prevention, in particular to an oil field coiled tubing blowout prevention device. Background Art

[0002] Coiled tubing is a technical equipment that plays an important role in oilfield operations. It has the characteristics of high operating efficiency and reusability. It can be used in acidizing and fracturing operations as well as drilling and well repair in oilfields, providing strong support for the efficient development and production of oilfields. In order to prevent major accidents such as blowouts, blowout prevention equipment is often used together with coiled tubing.

[0003] When in use, the main function of existing blowout preventers is to form a seal between the blowout preventer and the coiled tubing through its precision. However, its precision itself has a certain error value. If the error value is large, resulting in insufficient sealing, and the staff cannot be aware of it in advance, it will cause a major safety accident. Utility Model Content

[0004] In order to make up for the above deficiencies, the present invention provides an oilfield coiled tubing blowout prevention device that overcomes the above technical problems or at least partially solves the above problems.

[0005] The utility model is achieved in this way:

[0006] The utility model provides an oil field coiled tubing blowout prevention device, comprising a shell, a through pipe is provided on the top of the shell,

[0007] A detection mechanism, comprising:

[0008] A vacuum tube, the vacuum tube being sleeved inside the through tube, the vacuum tube being open at the bottom, and the inner cavity of the vacuum tube being in communication with the inner cavity of the through tube;

[0009] A sealing sleeve, the sealing sleeve being arranged at the bottom of the vacuum tube and in contact with the inner wall of the through tube;

[0010] A vacuum pump installed on the top of the vacuum tube;

[0011] A pressure detector, wherein the pressure detector is installed on the surface of the vacuum tube;

[0012] The tightening mechanism is arranged inside the vacuum tube and is used for squeezing the sealing sleeve.

[0013] In a preferred embodiment, the tightening mechanism includes:

[0014] A sealing ring, the sealing ring being fixedly mounted on the bottom of the vacuum tube;

[0015] A top plate, the top of which is arranged between the sealing ring and the sealing sleeve, the shape of the top plate is arranged to be arc-shaped, and the top plate contacts the inner wall of the sealing sleeve.

[0016] In a preferred solution, the shape of the sealing sleeve is set to be annular, the inner wall of the sealing sleeve is set to be open, and the sealing ring is set inside the opening of the sealing sleeve.

[0017] In a preferred embodiment, an entry and exit groove is provided on the inner wall of the through pipe, a positioning groove is provided at the bottom of the entry and exit groove, a positioning plate is fixedly installed at the bottom of the vacuum tube, the vacuum tube and the positioning plate are integrally formed, and the positioning plate is sleeved inside the positioning groove.

[0018] In a preferred solution, a gear is rotatably mounted inside the sealing ring, a rotating plate is rotatably mounted between the sealing ring and the top plate, meshing teeth are fixedly mounted on the inner wall of the rotating plate, and the meshing teeth are meshedly connected with the gear.

[0019] In a preferred embodiment, a plurality of arc-shaped plates are fixedly mounted on the surface of the rotating plate, an arc-shaped groove is provided on the top of the arc-shaped plate, a connecting shaft is provided on the internal sliding sleeve of the arc-shaped groove, and a limiting plate is fixedly mounted on the bottom of the connecting shaft.

[0020] In a preferred solution, a limiting groove is provided at the bottom of the outer wall of the sealing ring, the limiting plate is slidably sleeved inside the limiting groove, and the top of the limiting plate is fixedly connected to the bottom of the top plate.

[0021] In a preferred solution, an electric motor is fixedly installed inside the sealing ring, and the output end of the electric motor is fixedly connected to the top of the gear.

[0022] The utility model provides an oil field coiled tubing blowout prevention device, the beneficial effects of which include:

[0023] 1. By setting up a detection mechanism, insert the positioning plate along the inlet and outlet slots, rotate the vacuum tube to make the positioning plate rotate inside the positioning slot, connect the through pipe to the positioning plate with bolts, start the vacuum pump, and suck away the air inside the through pipe and vacuum tube. Since the rubber core and the coiled tubing should be in a sealed state when the blowout preventer is in use, start the pressure detector at this time to detect the pressure inside the vacuum tube to test the sealing.

[0024] 2. By setting up a tightening mechanism, multiple top plates are provided, and the shape of the top plates when viewed from the side is convex, and a groove hole that matches the protruding side is opened on its flat side, so that multiple top plates are grouped together to form a ring, and multiple top plates are moved to the side away from the center of the sealing ring. Since the surface of the top plate contacts the inner wall of the sealing sleeve, the sealing sleeve has a certain elasticity, so that the sealing sleeve is more tightly contacted with the inner wall of the vacuum tube, thereby improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure provided by the embodiment of the utility model;

[0027] Figure 2 A schematic diagram of a positioning plate and a positioning slot is provided for an embodiment of the present utility model;

[0028] Figure 3 A partial cross-sectional view of a positioning plate is provided for an embodiment of the present utility model;

[0029] Figure 4 A partial cross-sectional view of a sealing sleeve is provided for an embodiment of the utility model;

[0030] Figure 5 A partial cross-sectional view of a sealing ring is provided for an embodiment of the present utility model;

[0031] Figure 6 Provided for the implementation of the utility model Figure 5 A partial enlarged view of point A in the middle.

[0032] In the figure: 1. Shell; 2. Through pipe; 3. Vacuum tube; 4. Sealing sleeve; 5. Vacuum pump; 6. Pressure detector; 7. Sealing ring; 8. Top plate; 9. Inlet and outlet grooves; 10. Positioning groove; 11. Positioning plate; 12. Gear; 13. Rotating piece; 14. Meshing teeth; 15. Arc plate; 16. Arc groove; 17. Connecting shaft; 18. Limit plate; 19. Limit groove; 20. Electric motor. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Reference Figure 1-6 The utility model provides a technical solution: an oilfield continuous tubing blowout prevention device, comprising a shell 1, a through pipe 2 is arranged on the top of the shell 1, a detection mechanism comprises a vacuum tube 3, a sealing sleeve 4, a vacuum pump 5 and a pressure detector 6, the vacuum tube 3 is sleeved inside the through pipe 2, the vacuum tube 3 is set with a bottom opening, the inner cavity of the vacuum tube 3 is connected to the inner cavity of the through pipe 2, the sealing sleeve 4 is arranged at the bottom of the vacuum tube 3, the sealing sleeve 4 is in contact with the inner wall of the through pipe 2, the vacuum pump 5 is installed on the top of the vacuum tube 3, the pressure detector 6 is installed on the surface of the vacuum tube 3, the tightening mechanism is arranged inside the vacuum tube 3, for squeezing the sealing sleeve 4, the inner wall of the through pipe 2 is provided with an inlet and outlet groove 9, and the bottom of the inlet and outlet groove 9 is provided with a fixed The positioning groove 10 is provided with a positioning plate 11 fixedly mounted on the bottom of the vacuum tube 3. The vacuum tube 3 and the positioning plate 11 are integrally formed. The positioning plate 11 is sleeved inside the positioning groove 10. By setting a detection mechanism, the positioning plate 11 is inserted along the inlet and outlet grooves 9, and the vacuum tube 3 is rotated to rotate the positioning plate 11 inside the positioning groove 10. The through pipe 2 is connected to the positioning plate 11 by bolts, and the vacuum pump 5 is started. Since the inner cavities between the through pipe 2 and the vacuum tube 3 are connected, the air inside the through pipe 2 and the vacuum tube 3 is sucked away. Since the rubber core and the coiled tubing should be in a sealed state when the blowout preventer is in use, the pressure detector 6 is started at this time to detect the pressure inside the vacuum tube 3, thereby detecting the sealing performance.

[0035] Reference Figure 1-6 , the tightening mechanism includes a sealing ring 7 and a top plate 8. The sealing ring 7 is fixedly installed at the bottom of the vacuum tube 3, and the top is set between the sealing ring 7 and the sealing sleeve 4. The shape of the top plate 8 is set to be arc-shaped, and the top plate 8 contacts the inner wall of the sealing sleeve 4. By setting the tightening mechanism, multiple top plates 8 are provided, and the top plates 8 are convex in side view. A groove hole is opened on the flat side to match the protruding side, so that multiple top plates 8 are grouped together to form a ring around a circle, and multiple top plates 8 are moved to the side away from the center of the sealing ring 7. Since the surface of the top plate 8 contacts the inner wall of the sealing sleeve 4, the sealing sleeve 4 has a certain elasticity, so that the sealing sleeve 4 is more tightly contacted with the inner wall of the vacuum tube 3, thereby improving the sealing effect;

[0036] Reference Figure 1-6The shape of the sealing sleeve 4 is set to be annular, the inner wall of the sealing sleeve 4 is set to be open, the sealing ring 7 is set inside the opening of the sealing sleeve 4, the gear 12 is rotatably installed inside the sealing ring 7, and a rotating piece 13 is rotatably installed between the sealing ring 7 and the top plate 8. The inner wall of the rotating piece 13 is fixedly installed with meshing teeth 14, and the meshing teeth 14 are meshed with the gear 12. An electric motor 20 is fixedly installed inside the sealing ring 7, and the output end of the electric motor 20 is fixedly connected to the top of the gear 12. By setting the gear 12 and the meshing teeth 14, the electric motor 20 is started to drive the gear 12 to rotate, and the rotating piece 13 is rotated through the meshing connection between the gear 12 and the meshing teeth 14;

[0037] Reference Figure 1-6 , a number of arc-shaped plates 15 are fixedly installed on the surface of the rotating piece 13, and an arc-shaped groove 16 is provided on the top of the arc-shaped plate 15. A connecting shaft 17 is provided inside the sliding sleeve of the arc-shaped groove 16, and a limiting plate 18 is fixedly installed on the bottom of the connecting shaft 17. A limiting groove 19 is provided at the bottom of the outer wall of the sealing ring 7. The limiting plate 18 is slidably sleeved inside the limiting groove 19, and the top of the limiting plate 18 is fixedly connected to the bottom of the top plate 8. By setting the arc-shaped plate 15, when the rotating piece 13 rotates, the arc-shaped plate 15 is driven to rotate, so that the inner wall of the arc-shaped groove 16 squeezes the connecting shaft 17. Through the cooperation of the limiting groove 19, the limiting plate 18 drives the top plate 8 to move along the direction of the limiting groove 19, providing a driving force for the movement of the top plate 8.

[0038] Specifically, the working process or working principle of the oil field continuous tubing blowout prevention device is as follows: when in use, the positioning plate 11 is inserted along the inlet and outlet grooves 9, the vacuum tube 3 is rotated to rotate the positioning plate 11 inside the positioning groove 10, the through pipe 2 is connected to the positioning plate 11 by bolts, the electric motor 20 is started, the gear 12 is driven to rotate, and the meshing connection between the gear 12 and the meshing teeth 14 is used to rotate the rotating plate 13. When the rotating plate 13 rotates, it drives the arc plate 15 to rotate, so that the inner wall of the arc groove 16 squeezes the connecting shaft 17, and the limiting groove 1 9 cooperates with the limit plate 18 to drive the top plate 8 to move along the direction of the limit groove 19. Since the surface of the top plate 8 is in contact with the inner wall of the sealing sleeve 4, the sealing sleeve 4 has a certain elasticity, so that the sealing sleeve 4 is in closer contact with the inner wall of the vacuum tube 3. The vacuum pump 5 is started. Since the inner cavities between the through pipe 2 and the vacuum tube 3 are connected, the air inside the through pipe 2 and the vacuum tube 3 is sucked away. Since the rubber core and the coiled tubing should be in a sealed state when the blowout prevention equipment is in use, the pressure detector 6 is started at this time to detect the pressure inside the vacuum tube 3.

[0039] It should be noted that the electric motor 20, vacuum pump 5 and pressure detector 6 are devices or equipment existing in the prior art, or are devices or equipment that can be realized in the prior art. Their power supply, specific composition and principles are clear to those skilled in the art, so they will not be described in detail.

Claims

1. An oilfield coiled tubing blowout prevention device, comprising a housing (1), a through pipe (2) being provided on the top of the housing (1), characterized in that: A detection mechanism, comprising: A vacuum tube (3), wherein the vacuum tube (3) is sleeved inside the through tube (2), the vacuum tube (3) is provided with an opening at the bottom, and the inner cavity of the vacuum tube (3) is in communication with the inner cavity of the through tube (2); A sealing sleeve (4), the sealing sleeve (4) being arranged at the bottom of the vacuum tube (3), the sealing sleeve (4) being in contact with the inner wall of the through tube (2); A vacuum pump (5), the vacuum pump (5) being installed on the top of the vacuum tube (3); a pressure detector (6), wherein the pressure detector (6) is mounted on the surface of the vacuum tube (3); A tightening mechanism is provided inside the vacuum tube (3) and is used for squeezing the sealing sleeve (4).

2. The oilfield coiled tubing blowout prevention equipment according to claim 1, characterized in that: The tightening mechanism includes: A sealing ring (7), wherein the sealing ring (7) is fixedly mounted on the bottom of the vacuum tube (3); A top plate (8), the top of which is arranged between the sealing ring (7) and the sealing sleeve (4), the shape of the top plate (8) is arranged to be arc-shaped, and the top plate (8) contacts the inner wall of the sealing sleeve (4).

3. The oilfield coiled tubing blowout prevention equipment according to claim 2, characterized in that: The shape of the sealing sleeve (4) is set to be annular, the inner wall of the sealing sleeve (4) is set to be open, and the sealing ring (7) is set inside the opening of the sealing sleeve (4).

4. The oilfield coiled tubing blowout prevention equipment according to claim 1, characterized in that: An inlet and outlet groove (9) is provided on the inner wall of the through pipe (2), a positioning groove (10) is provided at the bottom of the inlet and outlet groove (9), a positioning plate (11) is fixedly installed at the bottom of the vacuum tube (3), the vacuum tube (3) and the positioning plate (11) are integrally formed, and the positioning plate (11) is sleeved inside the positioning groove (10).

5. The oilfield coiled tubing blowout prevention equipment according to claim 3, characterized in that: A gear (12) is rotatably mounted inside the sealing ring (7), a rotating plate (13) is rotatably mounted between the sealing ring (7) and the top plate (8), and meshing teeth (14) are fixedly mounted on the inner wall of the rotating plate (13), and the meshing teeth (14) are meshedly connected with the gear (12).

6. The oilfield coiled tubing blowout prevention equipment according to claim 5, characterized in that: A plurality of arc-shaped plates (15) are fixedly mounted on the surface of the rotating plate (13), an arc-shaped groove (16) is provided on the top of the arc-shaped plate (15), a connecting shaft (17) is provided in a sliding sleeve inside the arc-shaped groove (16), and a limiting plate (18) is fixedly mounted on the bottom of the connecting shaft (17).

7. The oilfield coiled tubing blowout prevention equipment according to claim 6, characterized in that: A limiting groove (19) is provided at the bottom of the outer wall of the sealing ring (7), the limiting plate (18) is slidably sleeved inside the limiting groove (19), and the top of the limiting plate (18) is fixedly connected to the bottom of the top plate (8).

8. The oilfield coiled tubing blowout prevention equipment according to claim 5, characterized in that: An electric motor (20) is fixedly installed inside the sealing ring (7), and the output end of the electric motor (20) is fixedly connected to the top of the gear (12).

Images