Measurement method of down-hole boring tool (drill) rotative velocity and direction and short node

A technology of rotation speed and measurement method, applied in the direction of drilling measurement, devices using electric/magnetic methods, measurement, etc., can solve non-intuitive and inaccurate problems, and achieve easy implementation, low measurement cost and simple structure Effect

Active Publication Date: 2008-05-21
XI'AN PETROLEUM UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to provide a method for measuring the rotational speed and direction of a

Method used

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  • Measurement method of down-hole boring tool (drill) rotative velocity and direction and short node
  • Measurement method of down-hole boring tool (drill) rotative velocity and direction and short node
  • Measurement method of down-hole boring tool (drill) rotative velocity and direction and short node

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, see Fig. 1 and Fig. 2. The magnetic field in nature is distributed according to the north-south direction. Two sets of fluxgate assemblies are installed on the drilling tool (drill bit). Axial vertical lines and located on different horizontal planes. When the drilling tool (drill bit) rotates once, the magnetic field signal measured by the corresponding fluxgate assembly is displayed as a sinusoidal waveform, and a complete waveform represents one rotation. Since two sets of fluxgate assemblies are provided, the magnetic field signals measured by the two sets of fluxgate assemblies are displayed as two sinusoidal waveforms, but their rates are consistent.

[0030] Since the signals sent by the two sets of fluxgate assemblies are displayed as two sinusoidal waveforms, the two sinusoidal waveforms will have a phase difference, and the rotation order of the two sets of fluxgate assemblies can be judged by using the phase difference, and the rotation directi...

Embodiment 2

[0031] Embodiment 2, see Fig. 3 and Fig. 4. The magnetic field in nature is distributed according to the north-south direction. Two sets of fluxgate assemblies are installed on a pup joint rigidly connected with the upper part of the drilling tool (drill bit). The two sets of fluxgate assemblies are respectively located at 90 degrees of the pup joint rotation plane Different axial vertical lines in the arc area, and located on a horizontal plane. The speed measurement method is the same as in Example 1.

[0032] Same as Embodiment 1, the rotation sequence of the two sets of fluxgate assemblies can be determined by using the phase difference, and the rotation direction of the drilling tool (drill bit) can also be determined by the rotation direction of the pup joint. In this embodiment, it can be seen that the drill (drill bit) rotates clockwise.

Embodiment 3

[0033] Embodiment 3, see Fig. 5 and Fig. 6. A short joint for measuring the rotation speed and direction of downhole drilling tools (drill bits, etc.), including a hollow body 3, the two ends of the body 3 are provided with an internal thread connection end 1 and an external thread connection end 6, and the outside of the body 3 is provided with an external thread connection end. The sleeve 2 is provided with two sets of fluxgate assemblies (4) and fluxgate assemblies (5) between the body 3 and the outer sleeve 2 . The two groups of fluxgate assemblies (4) and fluxgate assemblies (5) are respectively located on different axial vertical lines within the 90-degree arc region of the rotating surface, and are located on different horizontal planes. Therefore, the measurement of the rotational speed of the downhole drilling tool is realized by using the fluxgate. Both the fluxgate assembly (4) and the fluxgate assembly (5) include a fluxgate, a control acquisition storage module a...

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Abstract

The present invention relates to the art of underground parameters measuring technology, in particular to a method of measuring the rotating speed and the direction of an underground drilling tool (a drilling head) and a short chord. In order to overcome the non-intuitive and the inaccurate problem of the prior technology, the technical method provided by the present invention is that two groups of fluxgate modules are arranged on the drilling tool (the drilling head) which is measured or the short chord rigidly coupled with the upper and the lower parts of the drilling tool (the drilling head) which is measured; the two fluxgate modules are respectively arranged on different axial vertical lines in the 90-degree arc region of a rotating surface. The short cord for measuring provided by the present invention includes a hollow body; the two ends of the body are provided with an internal threaded joint end and an external threaded joint end; the external side of the body is provided with a non-magnetic external sleeve; two groups of fluxgate modules are arranged between the body and the external sleeve, and respectively located on vertical lines of different axial direction in the 90-degree arc region of a rotating surface. The present invention has the advantages of low cost, wide application range, simple structure and high security.

Description

Technical field: [0001] The invention relates to the technical field of downhole parameter measurement, in particular to a method for measuring the rotation speed and direction of a downhole drilling tool (drill bit) and a short joint. Background technique: [0002] In order to understand the working state of the mining drilling tool (drill bit) during the downhole drilling process, it is necessary to master various parameters of the downhole drilling tool (drill bit) operation. Among these parameters, the rotational speed is one of the important data. In order to obtain accurate parameters, the method used in the past is to estimate the speed of the downhole drilling tool (bit) from the speed of the uphole drilling tool. At present, there is no method that can directly measure the speed of the downhole drilling tool (bit). The problem with this method of estimating the rotational speed of the downhole drilling tool (drill bit) is that it is inaccurate, because the drill pi...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B47/02G01P3/44E21B45/00
Inventor 王宇邵增元张骁勇陆忠华黄敏沈建诚
Owner XI'AN PETROLEUM UNIVERSITY
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