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Drilling System Control

A drilling and controller technology, which is applied in the drilling automatic control system, program control, drilling equipment and other directions, and can solve problems such as performance degradation

Active Publication Date: 2018-05-01
PRAD RES & DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar to US Patent Publication No. 2011 / 0232966, as the drill string length changes, the model must be adjusted and model errors can lead to degraded performance

Method used

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Experimental program
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Embodiment Construction

[0033] Embodiments of the present invention involve a control / drive drilling system-including a top drive, a drill string, and a drill bit-to drill a borehole through the formation. The embodiment of the present invention proposes to drive the drill bit with a top drive device to optimize the rotation speed of the drill bit while minimizing the energy going down the drill string during the drilling process.

[0034] The following description only provides preferred exemplary embodiments, and is not intended to limit the scope, applicability, or configuration of the present invention. In fact, the following description of the preferred exemplary embodiment will provide those skilled in the art with a description of the preferred exemplary embodiment that can implement the present invention. It should be understood that it may be possible without departing from the scope of the present disclosure. Various changes were made to the function and arrangement of the components.

[0035] ...

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Abstract

The present disclosure provides a method for controlling a drilling system including a drive system, a drill string, and a drill bit. The drive system rotates the drill string to drill a wellbore through the formation during the drilling process. The method includes: setting a desired rotational speed v0 of the drill string; receiving property measurements of the drilling system, and deriving therefrom a component vup of the rotational speed of the drill string related to up-going rotational energy; by optimizing an expression to determine the rotational speed v of the drill string, which reconciles the conflicting goals of (i) maintaining a stable rotational speed centered on v0, and (ii) minimizing the down-rotating energy, the optimization The expression expresses v based on v0 and vup; and the drive system is controlled to rotate the drill string at v.

Description

Technical field [0001] Embodiments of the present disclosure relate to a method and controller for controlling a drilling system. Background technique [0002] Drilling oil and / or gas wells may involve drilling a considerable length of borehole; the vertical and / or horizontal length of the borehole is usually up to several kilometers. The drill string includes a drill bit at its lower end and some length of drill rod screwed / coupled together. The driving mechanism on the ground rotates the drill bit against the ground to drill the borehole through the ground. The drilling mechanism can be a top drive, a turntable, and so on. [0003] During the drilling procedure, the drill string will experience complex dynamic behavior in the wellbore. This complex behavior may include axial, lateral, and torsional vibrations as well as friction and vibration interactions with the wellbore. Simultaneous measurements of drilling rotation on the ground and at the drill bit show that when the top...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B44/00G05B19/02
CPCE21B44/00E21B3/022E21B44/02G05B19/401G05B2219/45129
Inventor B·P·杰夫赖伊斯
Owner PRAD RES & DEV LTD