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Circulating plugging-while-drilling device

A plugging device and drilling-while-drilling technology, which is applied in the field of drilling, achieves the effects of saving drilling time, being convenient to use, and having a reasonable and compact structure.

Pending Publication Date: 2019-06-25
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a circulating plugging device while drilling, which can effectively solve the technical problems of plugging while drilling and cleaning the cuttings bed during drilling, and greatly saves drilling time and drilling costs

Method used

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] Such as figure 1 As shown, the present invention provides a circulating leak stopper while drilling, which includes an outer cylinder 1, a perforated sliding sleeve 2 and a ball basket 3, wherein: the outer cylinder 1 is provided with at least one bypass nozzle 11; the perforated sliding sleeve A sleeve 2 is axially movably installed in the outer cylinder 1, the perforated sliding sleeve 2 can block the at least one bypass nozzle 11, and the perforated ...

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Abstract

The invention provides a circulating plugging-while-drilling device. The circulating plugging-while-drilling device comprises an outer cylinder, a hole-opening sliding sleeve and a ball basket; at least one bypass nozzle is arranged on the outer cylinder; the hole-opening sliding sleeve is inserted into the outer cylinder in an axial-moving manner, can plug the at least one bypass nozzle, and is provided with fluid flow holes capable of being communicated with the bypass nozzle; a ball catching claw and a ball seat are connected in the hole-opening sliding sleeve; the ball catching claw is positioned at the upper end of the ball seat; the fluid flow holes are positioned above the ball catching claw; and the ball basket is connected in the outer cylinder in a penetrating way, is positionedbelow the hole-opening sliding sleeve, and is provided with at least one hole-opening groove group. The circulating plugging-while-drilling device provided by the invention has the advantages that thetechnical problems of plugging-while-drilling and cleaning of a rock debris bed in a drilling process can be effectively solved, and the drilling time and cost can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a multifunctional circulation plugging device while drilling. Background technique [0002] During the drilling process, an urgent problem to be solved is the plugging while drilling when the lost formation is encountered. When drilling in loss-prone formations, when lost circulation occurs, due to the directional tools such as MWD or other drilling auxiliary tools in the drilling tool assembly, the plugging material cannot pass through the drill string smoothly. [0003] The conventional practice is that when the plugging operation is required, the well team must carry out the drilling operation, replace the drilling tool assembly and the drill bit water hole, and then carry out the drilling operation. After the plugging is completed, the drilling operation will be carried out again, and the drilling tool assembly will be replaced with the drilling tool assembly, and then the ...

Claims

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Application Information

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IPC IPC(8): E21B21/00E21B34/14
Inventor 穆总结李根生黄中伟葛洪魁王镇全
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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