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Variable flute jet drill

A chip flute and variable technology, applied in the field of oil and gas well drilling, to reduce pressure, prevent accumulation, and reduce hold-down effect

Inactive Publication Date: 2019-11-29
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods have certain effects, they all have corresponding requirements on drilling equipment, formation conditions, drilling costs, etc., so they have certain limitations

Method used

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  • Variable flute jet drill
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Embodiment Construction

[0029] The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted", "connec...

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Abstract

The invention discloses a jet flow drill bit with a variable chip groove, and relates to the field of oil and gas well drilling. The jet flow drill bit comprises a body extending along an axis and provided with a runner; a cutting mechanism is arranged on the body and used for cutting rocks; a first jet flow nozzle communicating with the runner is arranged at the lower end of the body and used forjetting flows to the bottom of a well and flushing rock debris particles generated by the cutting mechanism; a chip groove extending in an axis direction is formed in the side wall of the body; a notch for accommodating a sealing plate is formed in the side wall of the body; a first channel communicating with the runner and the notch is formed in the body in the radial direction; a telescopic mechanism in transmission with the sealing plate is arranged in the first channel; and the telescopic mechanism can drive the sealing plate to move in the radial direction under the hydraulic action of the flow channel, so that the chip groove has a blocking state and a smooth state. The state of the chip groove can be changed according to the working state of the drill bit, so that the using effectof the jet drill bit is improved.

Description

technical field [0001] The invention relates to the field of oil and gas well drilling, in particular to a variable jet drill bit with flutes. Background technique [0002] With the continuous development of unconventional oil and gas resources, the proportion of related complex structure wells based on horizontal wells is increasing year by year. During the drilling process of horizontal wells, it is difficult to carry rocks and it is not easy to increase the weight on bit. At the same time, large particles of cuttings are easy to form cuttings beds in the horizontal well section due to gravity, which may cause a series of complicated problems such as pump holding and drill sticking. underground accidents. [0003] The above problems not only restrict the improvement of ROP and drilling efficiency, but also affect the safety of drilling. In order to eliminate the problem of cuttings bed in horizontal wells and increase the rate of penetration of horizontal wells, methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/42E21B10/60
CPCE21B10/42E21B10/602
Inventor 喻开安曹通陈绪跃罗云清高德利
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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