ZFD type leaking stoppage system

A technology of bypass holes and water holes, which is applied in the direction of wellbore/well components, earthwork drilling, sealing/isolation, etc., which can solve the limitation of the number of throwing balls, no water holes, and can not handle the salvage accidents of sit-key MWD instruments To ensure safe use and reduce the effect of tripping out

Inactive Publication Date: 2019-07-05
BEIJING LIUHE GREATNESS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its internal structure is complicated and there is no large and smooth water eye, and the number of throws is also limited by the capacity of the short section of the basket, so the price is expensive
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Method used

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  • ZFD type leaking stoppage system
  • ZFD type leaking stoppage system
  • ZFD type leaking stoppage system

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Embodiment Construction

[0049] The present invention will be described in detail below in conjunction with accompanying drawings and embodiments, but those skilled in the art should know that the following embodiments are not the only limitation to the technical solution of the present invention, and any work done under the spirit of the technical solution of the present invention Equivalent transformation or modification shall be considered as belonging to the protection scope of the present invention.

[0050] The invention provides a ZFD type plugging system which can be used for many times, which is suitable for plugging without drilling when lost circulation occurs in the drilling process. The system consists of three parts: bypass valve nipple, salvage throwing ball, and self-floating fisher. The bypass valve nipple is an underground leak plugging tool, and the salvageable ball is used to perform ball throwing plugging operations unlimited times.

[0051] Bypass valve pup joints are composed of...

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Abstract

The invention discloses a ZFD type leaking stoppage system. According to the ZFD type leaking stoppage system, when well leaking occurs in the well drilling process, leaking stoppage can be conductedin time for many times under the condition without putting out of hole, well leaking complex accidents are dealt with, and the number of times of putting out of hole and running in hole can be effectively decreased. The ZFD type leaking stoppage system is more suitable for leaking stoppage in a well internally provided with various downhole instruments and downhole tools such as rotating guiding instruments, vertical guiding instruments, MWD instruments and screws, and the various downhole instruments can be effectively protected. Due to large and unblocked water holes of the ZFD type leakingstoppage system, the key sleeve type MWD instruments can be salvaged and put, and the advantages which other leaking stoppage tools do not have are achieved. A PBL leaking stoppage system is used generally currently, the effect is ideal, but the cost is high. Due to the fact that the ZFD type leaking stoppage system is provided with a basket pup joint, the key sleeve type MWD instruments cannot besalvaged and put. The ZFD type leaking stoppage system is easy to manufacture, high in practicability and less in investment. Bypass leaking stoppage is flexible and convenient, work reliability is high, the ZFD type leaking stoppage system can be widely applied to a petroleum well-drilling system, and comprehensive economic benefits of well drilling are increased.

Description

technical field [0001] The present invention is a ZFD type plugging system for petroleum drilling system. After lost circulation occurs in drilling, it can perform multiple plugging at any time without drilling. While plugging, it can effectively protect the downhole rotary steering, Various downhole instruments and tools, such as vertical guide, MWD, and screw rod, meet the requirements of salvage of MWD sit-key instruments after the occurrence of stuck pipe, salvage maintenance and release after instrument failure, ensuring the safe use of wireless MWD instruments and reducing tripping . Background technique [0002] Lost circulation is one of the most serious and complex situations that affect drilling safety. The occurrence of lost circulation will not only bring losses to drilling engineering, but also bring great difficulties to the exploration and development of oil and gas resources. Blowout, wellbore instability, reservoir damage, etc. are the problems caused by lo...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21B34/06
CPCE21B33/13E21B34/06
Inventor 张耀先张鹏翔冯建宇
Owner BEIJING LIUHE GREATNESS TECH
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