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Drilling string torsional energy control assembly and method

A technology for controlling components and drill strings, which is applied in the automatic control system of drilling, earth-moving drilling, drilling equipment, etc., can solve problems such as the inability to provide reliable sliding adhesion devices.

Inactive Publication Date: 2006-07-05
STRATALOC TECH PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The prior art cited above does not provide a reliable means for preventing slip sticking during drilling

Method used

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  • Drilling string torsional energy control assembly and method
  • Drilling string torsional energy control assembly and method
  • Drilling string torsional energy control assembly and method

Examples

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Embodiment Construction

[0044] Referring now to the drawings, and more particularly to the figure 1 and figure 2 , these figures show a downhole rotation control assembly 10 that may be used in drilling, drilling and / or in other applications that require the drill string to transmit torque, typically to the bottom hole assembly and drill bit. Although a specific embodiment of the rotary control system 10 is provided herein, the rotary control assembly 10 may also include any mechanism operable to connect and disconnect torque between the shaft or drilling tubular section to eliminate torsional oscillations, And thereby control the torsional energy in the drill string. Accordingly, the rotary control assembly 10 may include an on-off clutch that substantially or completely connects (engages) two rotary shafts and / or two drilling tubular sections and / or a drilling tubular section and drill bit for torque transmission , but can also be substantially or completely disconnected (disengaged) for little ...

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Abstract

The present invention provides a torsional energy control assembly and method for eliminating slip-stick and / or drill bit oscillations comprising axial and / or rotational oscillations. In one preferred embodiment, the assembly permits slippage between an upper portion of the drilling string and a lower portion of a drill string. The rotational control assembly may be installed at any desired position in the drill string. The rotational control assembly could also be utilized as a component of other drilling mechanisms such as a downhole drilling motor. The rotational control permits slippage while drilling for a selected time or selected rotational distance or other criteria to thereby release torsional energy in the drilling string which otherwise may produce damaging slip-stick torsional oscillations such as slip-stick. The rotational control assembly may, in one embodiment, comprise an on-off clutch whereby torque is either substantially completely transmitted or substantially not transmitted through the assembly for brief periods.

Description

technical field [0001] The present invention generally relates to drilling wellbores for oil, natural gas, and the like. More specifically, the present invention relates to assemblies and methods operable to quickly connect and disconnect upper and lower drill string sections to greatly enhance drilling performance by preventing drill bit oscillations. Background technique [0002] Energy industry experts consider slip sticking to be one of the biggest problems in modern oil and gas drilling. Other industry technologists believe that axial bit vibration and / or bit bounce constitute the most significant problems in oil and gas drilling. Based on studies of these problems by the present inventors, including the understanding of these problems as part of the present invention, it has been deduced and demonstrated by means of computer simulations that the two problems are closely related, as hereinafter described, and In fact both are directly equated with drill string torsion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B44/04
Inventor R·A·尼科尔斯L·G·帕尔莫B·L·泰勒
Owner STRATALOC TECH PROD
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