Drilling power tool, drilling tool and drilling method for forming boreholes

A technology of power tools and drilling tools, applied in drilling equipment and methods, drilling equipment, drill pipes, etc., can solve the problems of large damage, slow drilling speed, and short life of drilling tools, and achieve the goal of improving rock breaking efficiency Effect
CN102705140AActive Publication Date: 2012-10-03SINOPEC OILFIELD EQUIP CORP +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SINOPEC OILFIELD EQUIP CORP
Publication Date
2012-10-03

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Abstract

The invention discloses a drilling power tool, a drilling tool and a drilling method for forming boreholes. The drilling power tool comprises an energy conversion mechanism and a valve shaft system. The energy conversion mechanism is a rotary generator. The valve shaft system comprises a stator, a rotor, a movable valve sheet assembly, a fixed valve sheet assembly and a shaft assembly, wherein the rotor makes a reciprocating motion right and left and drives the movable valve sheet assembly directly connected with the rotor. The energy conversion mechanism is a screw rod or a turbine or an impeller. According to the invention, when a drilling bit is rotated, the drilling pressure at the drilling bit and the drilling pressure at the bottom of a drilling well are similar to the continuous gentle change of the sine law, which is favorable for the strength reduction of surrounding rocks and the development of fractures, so that the rock breaking efficiency can be improved obviously. In addition, because the pressure at the drilling bit and at the bottom of the drilling well is changed periodically, the negative-pressure injection and the high-pressure injection are generated alternately; and when the pressure becomes lower, the well drilling in an underbalance manner or by using the gas drilling fluid is carried out, so that the surrounding rock environment is changed, and the mechanical drilling rate is improved obviously.
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Description

technical field

[0001] The invention relates to a drilling power tool used in drilling engineering to improve the rock-breaking efficiency of the drill bit, prolong the service life of the drill bit, and prevent the drill from sticking, a new drilling tool composed of the same and a drilling method for forming a well hole. Background technique

[0002] The purpose of drilling is not only to build oil and gas channels, but more importantly, to discover more oil and gas resources and to improve drilling efficiency as much as possible. The problem faced by drilling engineering is always how to ensure "excellent, fast and economical". The research and development of drilling technology has been launched in response to these problems. Among them, "excellent" refers to safety, and "fast" refers to high efficiency, that is, how to safely improve drilling efficiency. "Excellent and fast" is an important goal that oil companies, drilling contractors and technical service companies ...

Claims

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