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The method of using the auto-compensation device for suspension diameter shrinkage of the coiled tubing four-ram blowout preventer

A technology of automatic compensation and blowout preventer, applied in drilling pipe, casing, earthwork drilling and other directions, can solve the problems of falling off, affecting the inner diameter of coiled tubing, micro-deformation, etc., to improve efficiency and reduce the number of workover operations , the effect of extending working hours

Active Publication Date: 2020-09-01
DONGYING YUANJIE PETROLEUM MACHINERY CO LTD
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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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  • The method of using the auto-compensation device for suspension diameter shrinkage of the coiled tubing four-ram blowout preventer
  • The method of using the auto-compensation device for suspension diameter shrinkage of the coiled tubing four-ram blowout preventer
  • The method of using the auto-compensation device for suspension diameter shrinkage of the coiled tubing four-ram blowout preventer

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Effect test

Embodiment 1

[0032] 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, a spring seat 4, a moving steel ball 5. Slips 15, the outer side of the compensation fixed body 1 is connected to the moving piston 8, and the two sets of compensation fixed bodies 1 form a trapezoidal body cavity structure, and cooperate with the two sets of compensation movable bodies 2 of the trapezoidal body structure, and the compensation activities The height of the body 2 is smaller than that of the compensation fixed body 1. Slips 15 are installed on the inner side of each compensation movable body 2, and are fixed with the outer wall of the coiled tubing 13 through the slips 15 to prevent the coiled tubing from falling off; each group of compensation movable bodies 2 The...

Embodiment 2

[0044] Embodiment 2, with reference to attached Figure 11 , 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

[0045] 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 method for using an automatic compensation device for continuous oil pipe four-ram preventer suspension diameter reduction. The outsides of compensation fixed bodies are connected with movable pistons. Two groups of compensation fixed bodies are matched with two groups of compensation movable bodies. The inside of each group of compensation movable bodies is installed with slips, and is fixed on the outer wall of a continuous oil pipe through the slips. In addition, the compensation movable bodies move along the inclined surfaces of the compensation fixed bodies, andthe compensation movable bodies move downward and inward under the combined force of the elastic force of a support spring and the gravity of the compensation movable bodies, and drive further tightening and fixing of the slips and the outer wall of the continuous oil pipe to achieve real-time compensation. The method has the advantage that the slips and the continuous oil pipe in diameter reduction are tightened to achieve the dynamic compensation effect, thus tightening of the slips can be achieved before the diameter of the continuous oil pipe is reduced to a certain extent, the oil well working time is prolonged, the well repair operation times are reduced, and the oil production efficiency is improved.

Description

technical field [0001] The invention relates to a coiled tubing four-ram blowout preventer suspension auxiliary device and method, in particular to a method for using a coiled tubing four-ram blowout preventer suspension diameter shrinkage automatic compensation device. 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 r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/06E21B19/10
CPCE21B19/10E21B33/06
Inventor 秘天昊
Owner DONGYING YUANJIE PETROLEUM MACHINERY CO LTD