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Shaft bottom particle injection drilling speed increasing tool

A particle and drilling technology, which is applied in the direction of drilling with liquid/gas jet, can solve the problem of poor particle suction effect, and achieve the effect of increasing the suction effect

Active Publication Date: 2014-05-07
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of poor particle inhalation effect of the above-mentioned particle impact drilling technology, the embodiment of the present invention provides a bottom hole particle ejection drilling speed-increasing tool

Method used

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  • Shaft bottom particle injection drilling speed increasing tool

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] see figure 1 , the bottom hole particle ejection drilling speed-up tool provided by the embodiment of the present invention includes an upper joint 1 connected to a drill collar (not shown in the figure), a casing 2, a shrinking nozzle 3 installed in the casing 2, a nozzle installed in the casing 2 The inner bushing 5 and the lower joint 7. Wherein, the lower joint 7 is connected with the drill bit 8 of the drilling device, and the drill bit 8 is provided with a plurality of water holes 81 penetrating with each other.

[0020] The upper joint 1 is axially provided with a stepped through hole 11 passing through its first end and its second end. Wherein, the stepped through hole 11 located at the first end is a large hole sectio...

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Abstract

The invention discloses a shaft bottom particle injection drilling speed increasing tool and belongs to the field of matched devices of petroleum and natural gas drilling. The tool comprises an upper connector, a contracting nozzle, a casing and a lower connector. The lower connector is connected with a drill bit provided with a water hole. The contacting nozzle is provided with a nozzle channel, an annular space is formed between the contacting nozzle and the casing, the nozzle channel is communicated with the annular space, the casing is provided with a particle suction port, a conical diffusion flowing channel is arranged on the lower connector, and the diameter of the inlet position where the diffusion flowing channel is communicated with the annular space is smaller than the diameter of the outlet position where the diffusion flowing channel is communicated with the water hole. In the drilling process, drilling liquid forms high speed injection flow through the contacting nozzle to be sprayed, a low pressure area is formed in the annular space under the injection effect of the injection flow, steelmaking particles in the annular space is sucked into the annular space through pressure difference of high pressure and low pressure, and the particle suction effect is improved.

Description

technical field [0001] The invention belongs to the field of supporting devices for oil and natural gas drilling, and in particular relates to a bottom-hole particle injection drilling speed-increasing tool capable of increasing the rock-breaking speed of drilling in deep hard formations. Background technique [0002] In recent years, with the continuous depletion of shallow oil and gas resources in my country, the discovery of oil and gas in deep hard formations and complex geological conditions is an important task for current exploration and development. During the drilling process, formation hardness and drilling difficulty increase continuously with the increase of well depth. Improving the rate of penetration in hard formations is one of the world-recognized problems. In the drilling of deep wells and hard rock formations in various oilfields at home and abroad, there are generally problems such as slow drilling speed, short life of drilling tools, long drilling cycle,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18
Inventor 孔璐琳汪海阁纪国栋査永进程荣超王灵碧崔猛张富成陈志学崔柳
Owner BC P INC CHINA NAT PETROLEUM CORP
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