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Coiled tubing four-ram blowout preventer full sealing device

A technology of blowout preventer and four rams, which is applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc., can solve the problems of increasing the volume of wellhead devices, reduce personal injury accidents, reduce difficulty, The effect of low processing cost

Active Publication Date: 2021-04-20
YANCHENG JIAXIN PETROCHEMICAL MASCH MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent adopts an integral fully-sealed ram, but its driving method is to install a lower ram active chamber on the outside of the blowout preventer, which not only increases the volume of the wellhead device, but also adopts a hydraulic method when sealing the well. Push the lower ram into the elastic valve seat to achieve full sealing. In addition, this structural design is not suitable for the well sealing device for the four-ram blowout preventer dedicated to coiled tubing.

Method used

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  • Coiled tubing four-ram blowout preventer full sealing device
  • Coiled tubing four-ram blowout preventer full sealing device
  • Coiled tubing four-ram blowout preventer full sealing device

Examples

Experimental program
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Effect test

Embodiment 1-5

[0030] Embodiment 1-5, a coiled tubing four-ram blowout preventer full-sealing device mentioned in the present invention, its technical solution is: including the main casing 19 and the hydraulic cylinder 20, the inner cavity of the main casing 19 is from the upper Install the full-sealing device, shearing device, suspension device and half-sealing device sequentially downwards, and a hydraulic cylinder 20 is installed on the outside of the main housing 19 to drive the full-sealing device, shearing device, suspension device or half-sealing device. , the improvements are: the full sealing device includes an upper joint 1, a full sealing outer cylinder liner 2, a ram fixing bolt 3, a ram shaft 4, a ram opening piston group 5, a connecting nozzle 6, and a sealing rubber 7 , sealing carrier 8, shutter closing bracket 9, return force spring 10, cutting and hanging body 11, the upper joint 1 and the cutting and hanging body 11 are fixedly connected through the fully sealed outer cylind...

Embodiment 2

[0046] Embodiment 2, with reference to attached Image 6 , the difference between the present invention and Embodiment 1 is that a return force spring 10 is provided on the outside of the guide shaft 9.2, the lower end of the return force spring 10 is arranged on the upper end of the cutting and hanging body 11, and the upper end of the return force spring 10 is in contact with the lower surface of the connection plate 9.1 In this way, the guide shaft can also be moved up and down along the reserved cylindrical groove of the cutting and hanging body 11, and at the same time, the accumulated spring compression force can make the sealing ram be pressed to the lower end surface of the upper joint when the well is sealed; in addition , the guide shaft 9.2 provided here can adopt a solid structure, since it is not necessary to install a spring in the inner cavity of the guide shaft, it is not necessary to adopt a hollow structure.

Embodiment 3

[0047] Embodiment 3, with reference to attached Figure 7 , the present invention differs from Embodiments 1 and 2 in that: the coiled tubing four-ram blowout preventer used in the present invention adopts the full-sealing device, shearing device and suspension device in Embodiments 1 and 2, but the half-sealing What device adopted is the improved half-sealing device, like this, the improvement of the present invention just lies in full-sealing device and half-sealing device, specifically as follows:

[0048] The present invention comprises a main housing 19 and a hydraulic cylinder 20, and a full-sealing device, a shearing device, a suspension device and a half-sealing device are successively installed in the inner chamber of the main housing 19 from top to bottom, and a The hydraulic cylinder 20 is used to drive the action of the full-sealing device, the shearing device, the suspension device or the semi-sealing device. The full-sealing device includes an upper joint 1, a fu...

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Abstract

The invention relates to a full sealing device for a four-ram blowout preventer of a coiled tubing. The technical solution is: including the main shell and the hydraulic cylinder, install the full sealing device, the shearing device, the suspension device and the semi-sealing device in the inner cavity of the main shell from top to bottom. When sealing the well, close the bracket through the gate The seal carrier is supported on the lower end surface of the upper joint by the return spring and the return spring to realize the seal; during the workover, the piston group is driven down by hydraulically driving the ram, and the seal carrier is pushed away, and further pressed down, so that the seal carrier rotates around the ram shaft , the coiled tubing can be run downhole along the inner cavity of the upper joint. The beneficial effect of the present invention is: because the whole seal is a vertical structure, that is, at least one double wing is removed, the working space is expanded, and the personal trauma accidents in the working are greatly reduced; the weight of the whole device is also greatly reduced, In this way, the difficulty in the operation reduces the processing cost, and it is safer and more reliable than the original 4FZ blowout preventer, more convenient to use, lower in processing cost and lighter in weight.

Description

technical field [0001] The invention relates to a four-ram blowout preventer full-sealing device and method, in particular to a coiled tubing four-ram blowout preventer full-sealing device. Background technique [0002] During the construction of coiled tubing in oil production, the 4FZ blowout preventer, that is, the four-ram blowout preventer, is a safety protection device that must be installed. In this device, the coiled tubing four-ram blowout preventer is Coiled tubing plays a pivotal role in the operation, and it is used to prevent blowout during the coiled tubing operation. Equipped with four ram assemblies, it can realize wellhead without pipe sealing, tubing shearing, tubing suspension, and pipe sealing; it is suitable for high-pressure wellhead and H2S working environment, adopts hydraulic drive, fast response speed, and manual locking, safety factor high. [0003] Among them, the full seal plays the role of safety guarantee when the well is shut down after shea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/06
CPCE21B33/06
Inventor 刘森瑞
Owner YANCHENG JIAXIN PETROCHEMICAL MASCH MFG CO LTD