Anti-seismic structure and anti-seismic method for gyro measurement while drilling

A technology of seismic structure and gyroscope, which is used in surveying, earth-moving drilling, wellbore/well components, etc., can solve the problems of poor seismic performance, affecting the service life of equipment, and inconvenient maintenance.

Pending Publication Date: 2022-03-29
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the actual operation and use of the current gyro measuring equipment, due to its poor anti-seismic performance, it can only be measured through the cable after the drilling is stopped, and the drilling while drilling cannot be re

Method used

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  • Anti-seismic structure and anti-seismic method for gyro measurement while drilling
  • Anti-seismic structure and anti-seismic method for gyro measurement while drilling
  • Anti-seismic structure and anti-seismic method for gyro measurement while drilling

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as Figure 1-Figure 6 As shown, the present embodiment provides a kind of anti-seismic structure for gyro measurement while drilling, including a sleeve 1, a hanging wire 10, a hanging plate 11, a pendant 8, a damping spring 9 and a damping limit block 22. The sleeve 1 Including the second section cylinder 4, the second section cylinder 4 has a section cylinder inner chamber, the lower end of the shock absorbing spring 9 is fixedly connected with the bottom surface of the section cylinder inner cavity, and the hanging plate 11 is connected to the section cylinder. The side wall of the cylinder cavity is slidingly connected, the bottom surface of the hanging plate 11 is connected with the pendant 8 through the hanging wire 10, and the bottom surface of the pendant 8 abuts against the upper end of the shock absorbing spring 9, so The hanging plate 11 is used to install the gyro measuring instrument, the damping limit block 22 is detachably connected with the side wal...

Embodiment 2

[0051] On the basis of Example 1, such as figure 1 , figure 2 , Figure 4 with Figure 5 As shown, the anti-seismic structure also includes a limiting plate assembly, the upper end of which is rotatably connected to the outer side wall of the second segment cylinder 4, and the limiting plate assembly can be rotated to the level or connected to the second The side walls of the section cylinder 4 abut against each other.

[0052] Before measurement, during equipment debugging or maintenance, the limit plate assembly can be extended to the level, and the limit plate assembly can be placed on the wellhead, so that the sleeve 1 can be positioned, the sleeve 1 can be assembled and fixed, or the inside of the sleeve 1 can be fixed. parts to adjust.

[0053] Wherein, there are at least two limiting plate assemblies, preferably, at least two limiting plate assemblies are evenly distributed in the circumferential direction of the second section cylinder 4, so that the supporting fo...

Embodiment 3

[0055] On the basis of Example 2, such as Figure 4 with Figure 5 As shown, the limiting plate assembly includes a roller shaft 16 and a limiting plate 15, and the outer wall of the second section cylinder 4 also has two vertical second slide grooves 18, and the upper end of the limiting plate 15 It is rotatably connected with the roller shaft 16 , and the two ends of the roller shaft 16 are respectively slidably connected with the corresponding second chute 18 .

[0056] The limiting plate 15 is expanded to the level, and the limiting plate 15 is placed on the wellhead, so that the sleeve 1 can be positioned. The roller shaft 16 is positioned after sliding along the second chute 18, and the height of the limit plate 15 can be adjusted, thereby adjusting the positioning height of the sleeve 1 and increasing the operational adaptability. When measuring while drilling, the limit plate 15 is rotated to abut against the side wall of the second section cylinder 4 and positioned ...

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Abstract

The invention relates to an anti-seismic structure and an anti-seismic method for gyro measurement while drilling, and relates to the field of underground azimuth measurement while drilling. A second section cylinder is internally provided with a section cylinder inner cavity, the lower end of a damping spring is fixedly connected with the bottom surface of the section cylinder inner cavity, a hanging plate is slidably connected with the side wall of the section cylinder inner cavity, and the bottom surface of the hanging plate is connected with a falling block through a hanging line; the bottom face of the falling block abuts against the upper end of the damping spring, the hanging plate is used for installing a gyro measuring instrument, the damping limiting blocks are detachably connected with the side wall of the inner cavity of the section cylinder, and the two sets of damping limiting blocks are located on the upper side and the lower side of the hanging plate respectively and abut against the hanging plate. The device has the beneficial effects that the falling block is additionally arranged below the hanging plate for mounting the gyro measuring instrument for counterweight, so that the stability of the hanging plate is enhanced. A damping spring and a damping limiting block are used for buffering and protecting the falling block and the hanging plate, so that the stability and damping of the gyro measuring instrument are realized, the measuring precision of the gyro measuring instrument is ensured, and measurement while drilling can be realized. The anti-seismic structure is simple and convenient to repair and maintain.

Description

technical field [0001] The invention relates to the technical field of underground azimuth measurement while drilling, in particular to an anti-seismic structure and an anti-seismic method for gyro measurement while drilling. Background technique [0002] With the continuous development of offshore oilfields, the problem of anti-collision in shallow layers of offshore oil cluster wells has become more and more prominent, and the well control risk caused by anti-collision of wellbore is becoming more and more serious. In order to solve the anti-collision in shallow layers of cluster wells, Gyro measurement tools are introduced into the drilling tool assembly. Gyro measurement is to use gyro theodolite to measure the gyro azimuth angle of a certain control network edge, and obtain the true azimuth angle of this edge through conversion. It is often used for directional connection measurement. The gyro azimuth is obtained from The gyroscope meridian (the meridian plane passing t...

Claims

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Application Information

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IPC IPC(8): E21B47/017E21B47/022
CPCE21B47/017E21B47/022
Inventor 曹川张燕萍吴千里罗勇何坤刘志同彭嵩梁国红
Owner BC P INC CHINA NAT PETROLEUM CORP
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