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Drilling tool assembly and method for well drilling with same

A drilling tool assembly and drill bit technology, which is applied in mines and oil and gas fields, can solve problems affecting drilling efficiency, under pressure, and risk increase, and achieve the effects of simple drilling tool assembly structure, improved cleanliness, and reduced occurrence probability

Inactive Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, during the drilling process of the drilling tool, the drill string is in static contact with the bottom of the well for a long time, and the risk of sticking increases, and the "back pressure" phenomenon frequently occurs during the drilling process
[0004] In the existing technology, the field engineers improve the quality of the wellbore by strengthening the short-start and reaming measures based on the wellbore. Bottom and readjust the tool face to continue drilling, thereby affecting drilling efficiency

Method used

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  • Drilling tool assembly and method for well drilling with same
  • Drilling tool assembly and method for well drilling with same
  • Drilling tool assembly and method for well drilling with same

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with accompanying drawing.

[0037] figure 1 A block diagram of a drill tool assembly 100 according to an embodiment of the present invention is shown in detail. Such as figure 1 As shown, the drilling tool assembly 100 includes a curved screw motor 1 , a centralizer 2 and a drill bit 3 . Wherein, the upper end of the centralizer 2 is fixedly connected with the rotor of the curved screw motor 1, so as to rotate together under the drive of the rotor of the curved screw motor 1, thereby playing the role of repairing the well wall. The upper end of the drill bit 3 is fixedly connected with the lower end of the centralizer 2, so as to follow the rotation of the rotor of the curved screw motor 1, thereby cutting the formation.

[0038] Therefore, by arranging the centralizer 2 on the rotor of the curved screw motor 1, the centralizer 2 can rotate together with the rotor of the curved screw motor 1, so th...

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Abstract

The invention discloses a drilling tool assembly and a method for well drilling with the same. The drilling tool assembly comprises a bent screw rod motor, a centralizer and a drill bit, wherein the upper end of the centralizer is firmly connected to a rotor of the bent screw rod motor; and the upper end of the drill bit is firmly connected to the lower end of the centralizer. The drilling tool assembly is characterized in that well walls could be trimmed during drilling; the occurrence probability of "supporting and pressing" can be reduced; and efficiency of oriented drilling can be increased.

Description

technical field [0001] The invention relates to the technical fields of oil and gas, mining, etc., in particular to a drilling tool assembly for directional drilling of horizontal wells and extended-reach wells and a drilling method using the same. Background technique [0002] In the past two decades, horizontal well technology has developed rapidly due to its advantages of increasing oil and gas single well production and realizing scale-effective development, and has played an important role in the field of oil and gas exploration and development. [0003] The performance of the drilling tool assembly directly affects the construction progress and the quality of the wellbore. In the drilling of horizontal wells and extended-reach wells, due to the relatively large curvature of the borehole generated by drilling, the frictional torque of the drill string when it is lifted and lowered in the borehole becomes larger. Moreover, during the drilling process of the drilling too...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B17/10E21B29/00E21B21/00
Inventor 郭瑞昌牛新明刘匡晓范红康刘卫东张建龙刘建华陈小锋孙连环王果马东军周号博
Owner CHINA PETROLEUM & CHEM CORP
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