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Petroleum drilling well drilling tool spherical flexible joint

A flexible joint, oil drilling technology, applied in drilling equipment, drill pipes, drill pipes, etc., can solve the problems of uneven and stable wellbore track curvature, and achieve the effect of simple structure, uniform and stable curvature

Inactive Publication Date: 2008-04-30
无锡浩安科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curvature of the wellbore trajectory drilled when drilling horizontal wells and directional wells cannot be uniform and stable

Method used

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  • Petroleum drilling well drilling tool spherical flexible joint

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Embodiment Construction

[0010] Below the present invention will be further described in conjunction with the embodiment in the accompanying drawing:

[0011] The present invention is mainly composed of a joint 1 with teeth, a seal 2, a spline shaft 3, a joint 4 with internal splines, a joint 5 with teeth and an adjusting piece 6, etc.

[0012] The present invention mainly adopts that a spherical head is provided at the front end of the spline shaft 3, which is sleeved on the joint 1 with teeth, and a seal 2 is arranged between them for sealing. The joint 4 of the spline is connected with the embedded joint 5 with teeth, and the adjusting plate 6 is installed on the bottom of the spline shaft 3 in the inner cavity of the embedded joint 5 with teeth.

[0013] Concave-convex platforms are arranged on the plane between the joint 1 with teeth and the joint 4 with internal splines to transmit torque, and the entire flexible joint is hollow and can transport drilling fluid.

[0014] The present invention i...

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Abstract

The invention relates to a spherical flexible tie-in for the oil-well drilling tool, which is in particular positioned in the drilling tool combination on the bottom of the oil-well. The invention is characterized in that a sphere is arranged on the front end of a spline shaft, the sphere is sleeved on a tie-in with embedded teeth, and a sealing piece is arranged between the sphere and the tie-in with embedded teeth for sealing. A tie-in of an inner spline is arranged on the outside of the lower part of the spline shaft, the tie-in of the inner spline is connected with a lower tie-in, an adjusting piece is arranged on the bottom of the spline shaft in the inner cavity of the lower tie-in with embedded teeth. The invention has simple, compact and rational structure. The pad in the adjusting lower tie-in can change the clearance of the embedded teeth, and then can change the degree of the rotation angle; can ensure that the track curvature of the well hole drilled during drilling horizontal well and directional well is even and stable (cannot be influenced by drilling pressure); thereby reaching the purposes of slope reducing and steadying when being positioned on a specific position of the aiguille during drilling straight well.

Description

technical field [0001] The invention relates to a spherical flexible joint of an oil drilling tool. Specifically, it is placed in an oil drilling bottom drilling tool assembly to achieve the purpose of reducing and stabilizing the inclination. Background technique [0002] During drilling, the oil drilling bottom hole tool transmits torque and drilling pressure to the drill bit, so that the wellbore azimuth and inclination change. The curvature of the wellbore trajectory drilled when drilling horizontal wells and directional wells cannot be uniform and stable. Contents of the invention [0003] The object of the present invention is to overcome above-mentioned weak point, thereby provides a kind of spherical flexible joint of petroleum drilling tool, when drilling horizontal well, directional well, the wellbore orbit curvature that is drilled is even and stable (not affected by drilling pressure); Adding it to a specific position on the drill bit in vertical well drilling...

Claims

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Application Information

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IPC IPC(8): E21B17/02
Inventor 贾仲宣
Owner 无锡浩安科技发展有限公司
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