A blowout preventer rubber sleeve for coiled tubing

Abstract

The utility model discloses a blowout preventer box rubber cylinder of coiled tubing, it contains: a rubber cylinder body, the rubber cylinder body has an inner hole, an upper wear -resisting ring and a lower wear -resisting ring, the upper wear -resisting ring and lower wear -resisting ring coaxially install in the inner hole of rubber cylinder body, the upper wear -resisting ring is not contacted with lower wear -resisting ring, make the inner hole hole face between both form an inner hole sealing surface, the utility model discloses rubber cylinder adopts combined structure, in the sealing of rubber cylinder in coiled tubing operation, wear resistance is realized simultaneously to meet the sulphur resistance demand of rubber cylinder in operation. Wear -resisting ring, rubber cylinder body are all semicircle structure, and two pieces are made into a pair, and the rubber cylinder is replaced in coiled tubing operation conveniently. The rubber cylinder is deformed under the action of the extrusion piston of blowout preventer box liquid cylinder, holds tightly coiled tubing, realizes the sealing, can adjust the liquid cylinder working pressure according to the well working pressure, realizes dynamic sealing effectively, and reduces the wear and tear simultaneously.

Description

Technical Field

[0001] This utility model relates to a control device for oil and gas drilling, and particularly to a blowout preventer sleeve for coiled tubing. Background Technology

[0002] Blowout preventer (BOP) cartridges are key components of well control systems, used in coiled tubing operations to effectively prevent blowouts and ensure safe operation. Their working principle involves hydraulic pressure compressing the sealing cartridge during coiled tubing runs to create a tight seal, isolating the well's internal pressure from the atmosphere and achieving well control. Currently used BOP cartridges have requirements for sealing performance, wear resistance, sulfur resistance, and lifespan; existing cartridge structures struggle to simultaneously meet all these functional requirements. Utility Model Content

[0003] The purpose of this invention is to provide a continuous tubing blowout preventer sleeve that addresses the difficulty of existing sleeve structures in simultaneously meeting requirements for sealing performance, wear resistance, sulfur resistance, and service life. This sleeve can simultaneously achieve sealing performance, wear resistance, sulfur resistance, and a longer service life.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: A continuous tubing blowout preventer cartridge, characterized in that it comprises: A glue tube body, the glue tube body having an inner hole; An upper wear-resistant ring and a lower wear-resistant ring are coaxially installed in the inner hole of the rubber sleeve body. The upper wear-resistant ring and the lower wear-resistant ring do not contact each other, so that the inner hole surface between the two forms an inner hole sealing surface.

[0005] In a preferred embodiment of this utility model, both the upper wear-resistant ring and the lower wear-resistant ring are longitudinally split two halves, and the two halves are combined together by an alternating contact structure or an inclined contact structure.

[0006] In a preferred embodiment of the present invention, a coaxial upper concave surface and a lower concave surface are provided on the upper and lower end faces of the rubber sleeve body, the upper wear-resistant ring is provided with an upper end face, the upper end face is placed in the upper concave surface, and the lower end face is placed in the lower concave surface.

[0007] In a preferred embodiment of this utility model, the upper section of the inner hole sealing surface is an upper conical hole, the lower section of the inner hole sealing surface is a lower conical hole, the portion below the upper end face of the upper wear-resistant ring is an upper conical cylinder, the upper conical cylinder mates with the upper conical hole, and the portion above the lower end face of the lower wear-resistant ring is a lower conical cylinder, the lower conical cylinder mates with the lower conical hole.

[0008] In a preferred embodiment of the present invention, the rubber tube body is a longitudinally split two-half structure, and the two halves are in staggered contact or inclined contact structure.

[0009] By employing the above technical solution, the assembled rubber sleeve of the coiled tubing blowout preventer (BOP) is installed inside the BOP. The BOP relies on hydraulic oil to push the extrusion piston upwards, compressing the BOP sleeve. The sleeve body deforms, compressing the wear-resistant rings into contact with the coiled tubing. Simultaneously, the inner sealing surface of the sleeve body between the upper and lower wear-resistant rings also deforms towards the periphery of the coiled tubing, contacting it as well. The surfaces of the upper and lower wear-resistant rings that are in staggered or inclined contact are mutually compressed, as are the surfaces of the sleeve bodies that are in staggered or inclined contact. This deformation creates a complete sealing band between the BOP sleeve and the coiled tubing, achieving the function of sealing the coiled tubing. Furthermore, because the wear-resistant band uses a relatively wear-resistant sealing material, its wear resistance is effectively improved. The sleeve body uses a relatively softer sealing material, achieving a deformable seal for the entire sleeve assembly. The modular structure allows for the use of various materials to meet different functional requirements, thus simultaneously fulfilling multiple functional needs of the BOP sleeve.

[0010] The structural features of this invention are its simple structure and convenient and reliable installation. This invention adopts a modular structure, allowing for assembly with various materials according to functional requirements, thereby simultaneously fulfilling multiple functional needs of the blowout preventer cartridge. This more effectively prevents blowout accidents. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the assembly structure of the continuous tubing blowout preventer cartridge according to Embodiment 1 of this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of the rubber tube body in Embodiment 1 of this utility model.

[0013] Figure 3 This is a schematic diagram of the upper wear-resistant ring structure in Embodiment 1 of this utility model.

[0014] Figure 4 This is a schematic diagram of the lower wear-resistant ring structure in Embodiment 1 of this utility model.

[0015] Figure 5 This is a schematic diagram of the installation and use of the continuous tubing blowout preventer sleeve in Embodiment 1 of this utility model.

[0016] Figure 6 This is a schematic diagram of the structure of the rubber tube body in Embodiment 2 of this utility model.

[0017] Figure 7 This is a schematic diagram of the upper wear-resistant ring structure in Embodiment 2 of this utility model.

[0018] Figure 8This is a schematic diagram of the lower wear-resistant ring structure in Embodiment 2 of this utility model. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings, through a preferred embodiment. Example 1

[0020] like Figures 1 to 5 The figure shows a continuous tubing blowout preventer cartridge, which includes a cartridge body 51, an upper wear-resistant ring 52, and a lower wear-resistant ring 53.

[0021] like Figure 2 As shown, the glue tube body 51 has an inner hole 511 and an upper concave surface 512 is provided on the upper end face of the glue tube body 51, and a lower concave surface 513 is provided on the lower end face of the glue tube body 51. The inner hole 511, the upper concave surface 512 and the lower concave surface 513 are coaxial.

[0022] The rubber sleeve body 51 is a longitudinally divided two-half structure, with the two halves connected by an alternating contact structure 516. The inner hole 511 of the rubber sleeve body 51 consists of an upper conical hole 514 and a lower conical hole 515. The upper conical hole 514 and the lower conical hole 515 are coaxial.

[0023] The upper wear-resistant ring 52 is provided with an upper end face 521, an upper cone 522 and an inner straight hole 523. The upper cone 522 and the inner straight hole 523 are coaxial. The upper wear-resistant ring 52 is a longitudinally split two-half structure. The two halves are combined together by an interlocking contact structure 524.

[0024] The lower wear-resistant ring 53 is provided with a lower end face 531, a lower tapered cylinder 532, and an inner straight hole 533. The lower tapered cylinder 532 and the inner straight hole 533 are coaxial. The lower wear-resistant ring 52 is a longitudinally split two-half structure, and the two halves are combined together by an interlocking contact structure 534. In addition, the inner straight hole 533 is flared 536 away from the lower end face 531, which can make the inner hole sealing surface 517 tightly grip the oil pipe.

[0025] During assembly, the upper wear-resistant ring 52 and the lower wear-resistant ring 53 are coaxially installed in the inner hole 511 of the rubber sleeve body 51. The upper wear-resistant ring 52 and the lower wear-resistant ring 53 do not contact each other, so that the inner hole 511 between them forms an inner hole sealing surface 517.

[0026] The upper end face 521 of the upper wear-resistant ring 52 is inserted into the upper concave surface 512 of the rubber tube body 51, and the upper conical cylinder 522 of the upper wear-resistant ring 52 is engaged with the upper conical hole 514 of the rubber tube body 51; the lower end face 531 of the lower wear-resistant ring 53 is inserted into the lower concave surface 513 of the rubber tube body 51, and the lower conical cylinder 532 of the lower wear-resistant ring 53 is engaged with the lower conical hole 515 of the rubber tube body 51.

[0027] like Figure 5As shown, a continuous tubing blowout preventer (BOP) sleeve is installed in the inner hole of the BOP window piston 3. The upper support sleeve 1 of the BOP is threadedly connected to the upper connecting flange 2. The window piston 3 is installed between the upper support sleeve 1 and the upper connecting flange 2. The upper connecting flange 2 and the lower flange 7 are bolted together. The compression piston 6 is installed inside the lower flange 7. In the inner hole of the window piston 3, from top to bottom, there is a guide sleeve 9, an anti-extrusion ring 4, a BOP sleeve 5, an anti-extrusion ring 4, and a lower guide sleeve 8.

[0028] Specific Application: During coiled tubing operations, hydraulic oil enters the lower cylinder of the lower flange 7 from inlet 71, pushing the compression piston 6 upward. The hydraulic pressure is transmitted through the compression piston 6 to the lower guide sleeve 8 and the anti-extrusion ring 4, compressing the blowout preventer sleeve 5. Under hydraulic force, the blowout preventer sleeve body deforms, compressing the wear-resistant rings and gripping the coiled tubing. Simultaneously, the portion 517 of the sleeve body 51 between the upper and lower wear-resistant rings also deforms towards the periphery of the coiled tubing, gripping it tightly. The interlocking contact surfaces 524 and 534 of the wear-resistant rings are mutually compressed, as are the interlocking contact surfaces 516 of the sleeve bodies. This deformation forms a complete sealing band between the blowout preventer sleeve and the coiled tubing, achieving the function of sealing the coiled tubing. Simultaneously, because the wear-resistant rings use a relatively wear-resistant sealing material, wear resistance is effectively improved, while the sleeve body uses a relatively softer sealing material, achieving assembly deformation sealing of the sleeve. The modular structure allows for the use of various materials according to functional requirements, thus simultaneously fulfilling multiple functional requirements of the blowout preventer sleeve. Example 2

[0029] See Figures 6 to 8 The difference between this embodiment and Embodiment 1 is that: the rubber sleeve body 51 is a longitudinally split two-half structure, with the two halves connected by an inclined surface contact structure 518. The upper wear-resistant ring 52 is a longitudinally split two-half structure, with the two halves connected by an inclined surface contact structure 525. The lower wear-resistant ring 53 is a longitudinally split two-half structure, with the two halves connected by an inclined surface contact structure 535. The rest of this embodiment is the same as Embodiment 1.

[0030] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A continuous tubing blowout preventer cartridge, characterized in that, Include: A glue tube body, the glue tube body having an inner hole; An upper wear-resistant ring and a lower wear-resistant ring are coaxially installed in the inner hole of the rubber sleeve body. The upper wear-resistant ring and the lower wear-resistant ring do not contact each other, so that the inner hole surface between the two forms an inner hole sealing surface.

2. The continuous tubing blowout preventer sleeve according to claim 1, characterized in that: Both the upper and lower wear-resistant rings are longitudinally split two halves, and the two halves are combined together using an alternating contact structure or an inclined contact structure.

3. The continuous tubing blowout preventer sleeve according to claim 2, characterized in that: The upper and lower end faces of the rubber sleeve body are provided with coaxial upper concave surface and lower concave surface. The upper wear-resistant ring is provided with an upper end face, the upper end face is placed in the upper concave surface, and the lower end face is placed in the lower concave surface.

4. The continuous tubing blowout preventer sleeve according to claim 3, characterized in that: The upper section of the inner hole sealing surface is an upper conical hole, the lower section of the inner hole sealing surface is a lower conical hole, the part below the upper end face of the upper wear-resistant ring is an upper conical cylinder, the upper conical cylinder mates with the upper conical hole, and the part above the lower end face of the lower wear-resistant ring is a lower conical cylinder, the lower conical cylinder mates with the lower conical hole.

5. The continuous tubing blowout preventer sleeve according to claim 4, characterized in that: The rubber sleeve body is a longitudinally split two-half structure, with the two halves in an alternating contact structure or a beveled contact structure.

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