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Drill bit used for petroleum well-drilling

A technology for oil drilling and drill bits, which is used in drilling equipment, driving devices for drilling in wellbore, earth-moving drilling, etc.

Active Publication Date: 2019-02-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The buckle ring is set on the drill body

Method used

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  • Drill bit used for petroleum well-drilling
  • Drill bit used for petroleum well-drilling
  • Drill bit used for petroleum well-drilling

Examples

Experimental program
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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0024] figure 1 A schematic diagram of the overall cross-sectional structure of the drill bit 10 for oil drilling according to the embodiment of the present invention is schematically shown. figure 2 A schematic diagram of a partial three-dimensional structure of a drill bit 10 for oil drilling according to an embodiment of the present invention is shown. image 3 A schematic diagram of a cross-sectional structure of the connection between the drill bit 10 for oil drilling and the drilling pipe according to the embodiment of the present invention is schematically shown. Figure 4 It schematically shows a schematic cross-sectional structural view of the drill bit 10 for oil drilling according to the embodiment of the present invention in a throttling state.

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Abstract

The invention provides a drill bit used for petroleum well-drilling. The drill bit comprises a drill bit body and a buckling-connection ring used for being connected with a well-drilling pipe, and cutting blades and an impeller are arranged at the two ends of the drill bit body correspondingly. The buckling-connection ring sleeves the drill bit body. The drill bit body is internally provided witha first flow-passing channel communicating with an inner cavity of the well-drilling pipe and the ends of the cutting blades arranged on the drill bit body, and the cross section area of the first flow-passing channel is smaller than that of the inner cavity of the well-drilling pipe. The mode of transmitting the torque and the bit pressure through a drill column can be discarded, the torque is transmitted through a drill bit autorotation mode, the throttling pressure difference is generated in the drill bit body, under the effect of the throttling pressure difference, the drill bit generatesthe drill pressure to formation rock in contact with the cutting blades, the purpose of cutting for rock breaking is achieved, and thus the purpose of producing a micro petroleum borehole is achieved.

Description

technical field [0001] The invention belongs to the technical field of petroleum downhole tools, and in particular relates to a drill bit used for petroleum drilling and a using method thereof. Background technique [0002] The drill bit is a common tool for producing boreholes in oil drilling. In the prior art, the drill bit is usually connected to the bottom of the drill string to provide rotational torque and pressure through the drill string to cut formation rocks and form a borehole. When the borehole size is small to a certain size and the borehole reaches a certain depth, the drill string cannot transmit the torque on bit due to buckling, so the conventional drill bit cannot meet the needs of fine borehole drilling. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a drill bit for oil drilling suitable for fine oil well holes. [0004] In order to solve the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/02E21B10/43
CPCE21B4/02E21B10/43
Inventor 戴文潮光新军韩峰朱和明崔晓杰侯乃贺薛占峰
Owner CHINA PETROLEUM & CHEM CORP
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