High-frequency circumferential impact type screw drilling tool structure

A kind of screw drilling tool and impact technology, which is applied to earth-moving drilling, drilling equipment, driving devices for drilling in wellbore, etc. question

Pending Publication Date: 2019-10-25
SHANDONG LUHAI GASOLINEEUM EQUIP
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the simple drill string or screw drilling tool assembly only provides power to the drill bit, which cannot keep the torque of the entire drill string stable and balanced, and cannot transmit the power to the drill bit evenly and stably, while the movement of the PDC bit is extremely disordered. Including transverse, longitudinal and torsional vibrations and combinations of these vibrations
Downhole vibration can damage a single PDC cutter, resulting in reduced bit life, causing torque fluctuations to interfere with directional control and logging-while-drilling (LWD) signals, and producing irregular boreholes that reduce wellbore quality, thereby greatly reducing ROP and improving drilling cost

Method used

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  • High-frequency circumferential impact type screw drilling tool structure

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Embodiment Construction

[0017] The technical solutions of the present invention will be further described below through specific examples.

[0018] Such as figure 1 The structure of a high-frequency circumferential impact screw drilling tool is shown, including a bypass valve assembly 1, an anti-drop assembly 2, a motor assembly 3, a cardan shaft assembly 4, a drive shaft assembly 5 and a circumferential impact Assembly 6, bypass valve assembly 1, anti-drop assembly 2, motor assembly 3, cardan shaft assembly 4, transmission shaft assembly 5, and circumferential impact assembly 6 are connected in sequence.

[0019] The transmission shaft assembly includes a transmission shaft, an upper radial bearing, an upper bearing shell, a lower radial bearing, a lower bearing shell and a bearing, and the lower radial bearing, the lower bearing shell and the bearing are installed in the The upper end of the transmission shaft connects the upper bearing shell with the lower bearing shell, puts into the upper radia...

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Abstract

The invention provides a high-frequency circumferential impact type screw drilling tool structure. The structure comprises a bypass valve assembly, an anti-fall assembly, a motor assembly, a universalshaft assembly, a transmission shaft assembly and a circumferential impact assembly which are connected in sequence. The high-frequency circumferential impact type screw drilling tool structure has the beneficial effects that the high-frequency circumferential impact type screw drilling tool structure cooperates with a PDC drill bit to be used together, the phenomenon that one or more vibrations(in the transverse, longitudinal and torsional direction) and clamping slip occur during downhole drill bit motion is eliminated, and the torque of a whole drill column keeps stable and is transmittedto the drill bit in a balanced mode; and according to the rock breaking mechanism, impact breaking is mainly conducted, a rock layer is subjected to high-frequency rotational shear, accordingly, quick and smooth drilling is achieved, the well drilling efficiency is improved, and the well drilling cost is reduced.

Description

technical field [0001] The invention relates to the field of drilling tools for oil and natural gas exploitation, and more specifically relates to a high-frequency circumferential impact screw drilling tool structure. Background technique [0002] At present, the simple drill string or screw drilling tool assembly only provides power to the drill bit, which cannot keep the torque of the entire drill string stable and balanced, and cannot transmit the power to the drill bit evenly and stably, while the movement of the PDC bit is extremely disordered. Including transverse, longitudinal and torsional vibrations and combinations of these vibrations. Downhole vibration will damage a single PDC cutter, resulting in reduced bit life, causing torque fluctuations to interfere with directional control and logging-while-drilling (LWD) signals, and producing irregular boreholes that reduce wellbore quality, thereby greatly reducing ROP and improving drilling cost. Contents of the inv...

Claims

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Application Information

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IPC IPC(8): E21B4/16
CPCE21B4/16
Inventor 杨金龙秦泽旭赵志刚王玉卓冯婷婷张志凯王春秀刘嘉麒
Owner SHANDONG LUHAI GASOLINEEUM EQUIP
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