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Drilling device and method

A drilling and drill bit technology, which is applied to drilling equipment, liquid/gas jet drilling, drill bits, etc., can solve the problems of limiting drilling speed and limited rock-carrying capacity, and achieve the effects of stabilizing the well wall and improving efficiency and capacity

Inactive Publication Date: 2018-09-25
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] However, in the drilling process, it is often found that the rock-carrying ability of high-pressure water jet drilling is limited, which limits the drilling speed to a certain extent.

Method used

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  • Drilling device and method

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with accompanying drawing.

[0032] figure 1 A drilling arrangement 100 according to the invention is shown. Such as figure 1 As shown, the device 100 includes a coiled tubing assembly 1 and a drill bit 2 . Among them, the coiled tubing assembly 1 is used to connect the drill bit 2 and surface pumping equipment to transport drilling fluid. The drill bit 2 is used to receive the drilling fluid delivered by the coiled tubing assembly 1 and spray the drilling fluid to the formation to break the rock formation and form grooves in the formation. The coiled tubing assembly 1 according to the present invention has at least two fluid channels to communicate with different fluid channels provided on the drill bit 2 respectively.

[0033] Through different fluid passages of the coiled tubing assembly 1 , different fluid passages on the drill bit 2 are supplied with drilling fluids of different pressure value...

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Abstract

The invention provides a drilling device and method. The device includes a continuous tube assembly and a drill bit, and the continuous tube assembly is provided with at least two fluid passages in communication with different fluid passages disposed on the drill bit. The device is capable of pumping drilling fluid of two different pressures into a rock formation, and the high pressure drilling fluid is mainly used for breaking rocks and cutting grooves on the rocks. After the low pressure drilling fluid and the high pressure drilling fluid meet, the drill bit can be cooled, a well wall can bestabilized, and the efficiency and capability of carrying rock fragments to the ground can be improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a drilling device and method. Background technique [0002] In drilling, high pressure water jet technology is often used. That is, the high-pressure jet flow formed by the drilling fluid through the drill bit is used to break the rock. Compared with the mechanical method, this drilling method has the advantages of high drilling efficiency and low cost. [0003] However, during the drilling process, it is often found that the rock-carrying ability is limited when the high-pressure water jet is used for drilling, which limits the drilling speed to a certain extent. Contents of the invention [0004] Aiming at part or all of the above-mentioned technical problems existing in the prior art, the present invention proposes a drilling device and method. The device can pump two kinds of drilling fluids with different pressures to the rock formation, among which the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/18E21B17/18E21B17/10E21B10/60
CPCE21B7/18E21B10/60E21B17/1042E21B17/18
Inventor 王敏生光新军皮光林闫娜思娜邸伟娜胡静
Owner CHINA PETROLEUM & CHEM CORP
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