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Coiled tubing four-flashboard blowout preventer suspended radial-shrinkage automatic compensation device and method

A technology of automatic compensation and blowout preventer, which is applied in the direction of drill pipe, casing, earthwork drilling and production, etc. It can solve the problems affecting the inner diameter of coiled tubing, micro-deformation, shedding, etc., to achieve better clamping effect and increase contact area, the effect of improving efficiency

Active Publication Date: 2019-02-15
融创达科技成果转化(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems with the suspension ram as follows: Although the eccentric structure is used to increase the frictional force, the utility model patent does not fundamentally solve the problem of radial shrinkage, and the eccentric structure still squeezes the coiled tubing , and cause micro-deformation, and even affect the inner diameter of the coiled tubing. Since the utility model does not implement compensation for the radial shrinkage force of the coiled tubing, when the diameter shrinks to a certain extent, it will still fall off

Method used

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  • Coiled tubing four-flashboard blowout preventer suspended radial-shrinkage automatic compensation device and method
  • Coiled tubing four-flashboard blowout preventer suspended radial-shrinkage automatic compensation device and method
  • Coiled tubing four-flashboard blowout preventer suspended radial-shrinkage automatic compensation device and method

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Embodiment 1

[0033] Embodiment 1, with reference to attached figure 1, a coiled tubing four-ram blowout preventer hanging diameter automatic compensation device mentioned in the present invention, its technical solution is: comprising a compensation fixed body 1, a compensation movable body 2, a support spring 3, slips 15, the described The outer side of the compensating fixed body 1 is connected with the moving piston 8, and the two sets of compensating fixed bodies 1 form a trapezoidal body cavity structure, and cooperate with two groups of compensating movable bodies 2, and the height of the compensating movable body 2 is equal to the height of the compensating fixed body 1, each Slips 15 are installed on the inner side of the compensation movable body 2, and the outer wall of the coiled tubing 13 is fixed through the slips 15 to prevent the coiled tubing from falling off; There is a lower baffle 17; the outer slope of each compensation movable body 2 and the inner slope of the compensa...

Embodiment 2

[0045] Embodiment 2, with reference to attached Figure 8 , a coiled tubing four-ram blowout preventer hanging diameter automatic compensation device mentioned in the present invention is different from Embodiment 1 in that the slip teeth on the inner surface of the slips mentioned in the present invention adopt ring teeth, The cross-section of the ring teeth is a right triangle structure, so that the cylindrical slip surface formed by the combination of two sets of slips can be firmly fixed and hugged when in contact with the outer wall of the coiled tubing.

Embodiment 3

[0046] Embodiment 3, a coiled tubing four-ram blowout preventer hanging diameter automatic compensation device mentioned in the present invention, differs from Embodiments 1 and 2 in that the slip teeth on the slip inner surface mentioned in the present invention The adopted "well" shaped teeth have grooves distributed both horizontally and vertically. In this way, when the cylindrical slip surface formed by the combination of two sets of slips contacts the outer wall of the coiled tubing, the gripping force is better.

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Abstract

The invention relates to a coiled tubing four-flashboard blowout preventer suspended radial-shrinkage automatic compensation device and method. According to the technical scheme, two groups of compensation fixed bodies form a trapezoid cavity structure and is matched with two groups of compensation movable bodies, the outer side inclined surfaces of the compensation movable bodies are connected with the inner side inclined surfaces of the compensation fixed bodies through I-shaped tracks, the heights of the compensation movable bodies are equal to the heights of the compensation fixed bodies,slips are mounted on the inner sides of the groups of compensation movable bodies, and the compensation movable bodies are fixed to the outer wall of a coiled tubing through the slips to prevent the coiled tubing from falling off. The coiled tubing four-flashboard blowout preventer suspended radial-shrinkage automatic compensation device and method have the beneficial effects that the lengths of the slips are equal to the heights of the compensation fixed bodies, the contract area of the outer wall of the coiled tubing is increased, therefore, under the condition of not changing body space, working parts and effective working segments of the slips are increased, the capacity of tightly holding the coiled tubing is further improved, so that the working time of an oil well is prolonged, times of well repair operation are reduced, and the production efficiency of the oil well is improved.

Description

technical field [0001] The invention relates to a suspension auxiliary device of a coiled tubing four-ram blowout preventer, in particular to an automatic compensation device and method for suspension diameter reduction of a coiled tubing four-ram blowout preventer. Background technique [0002] During the construction of coiled tubing, 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 used in coiled tubing operations It has a pivotal position and is used to prevent blowout during coiled tubing operations. 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. Among them, the function of the suspension ram i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/06E21B19/10
CPCE21B19/10E21B33/06
Inventor 秘天昊
Owner 融创达科技成果转化(江苏)有限公司
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