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Measuring speed of rotation of downhole motor

A rotation speed, drilling technology, applied in the direction of measurement, measurement device, drilling measurement, etc., can solve the problem of high cost efficiency

Inactive Publication Date: 2013-11-27
PRAD RES & DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Downhole motors are likely to be the most cost-effective method, although other methods can be used to steer the drilling process to directionally drill the borehole

Method used

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  • Measuring speed of rotation of downhole motor
  • Measuring speed of rotation of downhole motor
  • Measuring speed of rotation of downhole motor

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Experimental program
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Embodiment Construction

[0049] The ensuing description provides preferred exemplary embodiments only, and is not intended to limit the scope, applicability or configuration of the present invention. Rather, the ensuing description of the preferred exemplary embodiment will provide those skilled in the art with an enabling description for implementing the preferred exemplary embodiment of the invention. It should be understood that various changes can be made in the function and arrangement of elements without departing from the scope of the invention as set forth herein.

[0050] In the following description specific details are given to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that the embodiments may be practiced without these specific details. For example, circuits are shown in block diagram form in order not to obscure the embodiments with unnecessary detail. In other instances, well-known circuits, processes, algorithms, stru...

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Abstract

The invention provides a method of optimising the rate of penetration of a hydraulically or pneumatically powered rotor and stator driven drill as it drills a wellbore into the earth, the method comprising: (a) measuring a first set of rotor and stator operating parameters including the weight applied to the drill bit, the speed of rotation of the rotor and rotor torque for a first period of time, (b) generating a first set of relationships from the first set of operating parameters to enable the rotor speed and rotor torque to be predicted over a range of operating parameter values, (c) determining the rate of penetration for the first period of time from measurements of weight applied to the bit and rotation speed of the bit, (d) determining whether any other combination of weight applied to bit and rotation speed of bit, provided by the relationships determined in step (b) are capable of providing a greater rate of penetration, and (e) adjusting at least one operating parameter to move the weight applied to bit and / or speed of rotation of bit towards the combination which provides a first greater rate of penetration.

Description

technical field [0001] Embodiments of the invention relate to drilling equipment, such as positive displacement motors or turbines, comprising a drill bit connected to a rotor rotatably mounted inside a stator. Background technique [0002] In the petroleum and petrochemical industry, in oil and / or gas wells, downhole motors are used to apply power to the drill bit at the downhole location for drilling. A downhole motor, sometimes called a "mud motor," is positioned at the bottom of the drill string and is coupled to the drill bit via an output shaft. Drilling fluid, sometimes called "drilling mud," or simply "mud," is pumped up the drill string and through a downhole motor. The downhole motor uses the force of the pumped / flowing drilling fluid to produce a mechanical output, producing rotation of the output shaft, which in turn produces rotation of the drill bit. [0003] Although there are different types of downhole / mud motors, the most common type used today is the pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K11/00H02K7/14
CPCE21B4/02G01P3/44E21B47/00E21B45/00H02K11/0021E21B44/02G01P3/487E21B44/00H02K11/215
Inventor A·约翰逊M·巴雷特B·杰弗瑞斯W·奥尔德雷德M·林格
Owner PRAD RES & DEV LTD