Angle position measurement method and system

A technology of angle position and measurement method, which is applied in the field of oil drilling, and can solve the problems of unfavorable on-site installation, many magnetic grid unit disks, and large volume

Active Publication Date: 2015-06-24
CHINA PETROCHEMICAL CORP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, when high-precision measurement is required, the magnetic grid code disc needs more magnetic grid unit discs, so the problem is that the volume is large and it is not conducive to on-site installation

Method used

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  • Angle position measurement method and system
  • Angle position measurement method and system

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Embodiment Construction

[0039] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment of the present invention and each feature in each embodiment can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0040] Such as figure 1As shown, it shows a block diagram of the hardware structure of the downhole drilling tool angular position measurement system according to an embodiment of the present invention. The system includes, for example, a three-axis acceleration sensor 101 , at least two-axis fluxgate sensor 102 , a data acquisition unit 103 , a flow switch sensor 104 , a communication unit 105 , a zero-crossing comparator ...

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Abstract

The invention discloses an angle position measurement method and system. The method includes: collecting downhole condition information in real time; judging whether a drilling tool is in a static state or not on the basis of rotating speed determined by mud flow information and geomagnetic field information or gravity field information; when the drilling tool is static, calculating well deviation and a static gravity tool surface and a static magnetic tool surface of the drilling tool, and determining a benchmarking tool surface to be the static gravity tool surface or the static magnetic tool surface; when the drilling tool is dynamic, calculating variation of the magnetic tool surface; subjecting the variation of the benchmarking tool surface and the magnetic tool surface to superposition calculation to a dynamic gravity tool surface of the drilling tool and determining the angle position of the drilling tool. The gravity tool surface of the drilling tool is measured in real time by relative change of a rotating magnetic field, magnetic interference is monitored, affect of magnetic inference on measurement results can be avoided, and the angle position of the drilling tool is accurately measured.

Description

technical field [0001] The present invention relates to the field of oil drilling, and more specifically, the present invention relates to a method and system for measuring angular positions of rotary steering, logging while drilling and geological steering tools or instruments. Background technique [0002] In directional wells and horizontal wells, drilling downhole systems such as rotary steering, logging while drilling and geosteering need to determine the direction of a fixed reference point on the drilling tool Measurement or control of the circumferential direction of the eye. Among them, the reference point of the borehole circumferential direction usually refers to the north pole of the earth's magnetic field or the high side of the borehole, and a fixed reference point on the drilling tool usually refers to the tool face of the drilling tool. For example, in a rotary steerable system, in order to realize steering control, it is necessary to determine the direction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/024
CPCE21B47/024
Inventor 杨锦舟肖红兵韩来聚李作会杨全进杨宁宁
Owner CHINA PETROCHEMICAL CORP
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