Axial impact oscillating screw drill
A technology of screw drilling tools and axial impact, which is applied to earthwork drilling, drilling equipment, and driving devices for drilling in boreholes. Increased the effect of eating into rock depth
Active Publication Date: 2022-07-05
BEIJING UNIV OF TECH +1
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Problems solved by technology
[0009] The purpose of the present invention is to provide an axial impact oscillating screw drilling tool to solve the problem of low rock breaking efficiency when using a screw drilling tool to drill in deep hard formations existing in the prior art. The axial impact oscillating screw drilling tool Combining the screw drilling tool and the axial impact assembly, the compatibility is good, and the ROP and drilling capacity of the drilling tool are effectively improved
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[0051] In order to have a clearer understanding of the technical features, objects and effects of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings.
[0052] The specific embodiments of the present invention described herein 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 modifications 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 can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening element...
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The present invention is an axial impact oscillating screw drilling tool, comprising a screw drilling tool body, and the screw drilling tool body includes a bypass valve assembly, a motor assembly and a drive shaft assembly sequentially connected from top to bottom. The bottom of the drive shaft assembly is connected with an axial impact assembly, the axial impact assembly includes an impact shaft that can move axially reciprocatingly, the bottom of the impact shaft is connected to a drill bit, and the outer side of the impact shaft is sleeved with a heavy duty shaft. A hammer, the axial impact assembly is used to convert the fluid energy of the drilling fluid into an axial impact force on the drill bit. The invention solves the problem of low rock-breaking efficiency when drilling with a screw drilling tool in the deep well hard strata in the prior art. The axial impact oscillating screw drilling tool combines the screw drilling tool and the axial impact assembly together. Good compatibility, effectively improve the ROP and drilling capacity of drilling tools.
Description
technical field [0001] The invention relates to downhole drilling tools in the field of petroleum development, in particular to an axial impact oscillating screw drilling tool. Background technique [0002] With the rapid development of drilling engineering, the use of downhole power drilling tools has become a relatively common drilling method. This type of tool converts a part of the hydraulic kinetic energy of the high-pressure drilling fluid into rotational mechanical energy to provide rotational torque near the drill bit. Driving the drill bit to rotate has the advantages of large output torque, high energy transfer efficiency, simple operation and deflection ability. [0003] The current downhole power drilling tools mainly include screw drilling tools and turbo drilling tools. Among them, screw drilling tools have gradually become an indispensable conventional drilling tool in drilling engineering due to their large torque, strong deflection ability and simple structu...
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IPC IPC(8): E21B4/16
CPCE21B4/16
Inventor 查春青柳贡慧李军
Owner BEIJING UNIV OF TECH