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Measurement method of liquid column height of blowout fluid in offshore drilling based on hull degree of freedom

A technology for offshore drilling and height measurement, which is used in distance measurement, measurement device, line-of-sight measurement, etc. to improve measurement accuracy, facilitate the use of equipment, and reduce environmental errors.

Active Publication Date: 2021-07-13
CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the above problems, the object of the present invention is to provide a method for measuring the height of the blowout fluid column in offshore drilling based on the degree of freedom of the hull for accurately measuring the height of the blowout liquid column and solving the problem of bottomhole pressure measurement during blowout accidents.

Method used

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  • Measurement method of liquid column height of blowout fluid in offshore drilling based on hull degree of freedom
  • Measurement method of liquid column height of blowout fluid in offshore drilling based on hull degree of freedom
  • Measurement method of liquid column height of blowout fluid in offshore drilling based on hull degree of freedom

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Embodiment 1

[0046] Such as figure 1 As shown, the device for measuring the height of the blowout fluid column in offshore drilling based on the hull degree of freedom provided by the present invention includes at least three inclination measuring devices 1 (the number of inclination measuring devices 1 in this embodiment is three, as an example), one Signal conditioning and preprocessing device 2, a data acquisition unit 3 and a computer 4, wherein three inclination measuring devices 1 are fixedly arranged on the hull at equal intervals along the hull direction of the observation ship, and the three inclination measuring devices 1 are arranged along the same line Aligned straight lines.

[0047] Such as figure 2 As shown, each inclination measuring device 1 includes a structural support 11 , a movable arm 12 , a high point viewing mirror 13 , an angle measuring sensor 14 , a moving mirror 15 , a small telescope 16 and a fixed mirror 17 . The back side of the structural support 11 is mo...

Embodiment 2

[0056] The present invention also provides a measurement method for a liquid column height measuring device for offshore drilling blowout fluid based on the degree of freedom of the hull, the specific content of which is:

[0057] 1. If figure 1 As shown, three inclination measuring devices 1 are fixedly installed on the hull of the observation ship, and the three inclination measuring devices 1 are arranged at equal intervals along the same line along the direction of the hull.

[0058] 2. Connect each inclination measuring device 1 to the signal conditioning and preprocessing device 2 respectively, and connect the signal conditioning and preprocessing device 2, the data acquisition unit 3 and the computer 4 in sequence, and perform a power-on self-check on each device.

[0059] 3. If image 3 As shown, the small telescopes 16 of the three inclination measuring devices 1 are all placed horizontally, and at the same time, they are aligned with the low point of the blowout flu...

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Abstract

The invention relates to a method for measuring the liquid column height of an offshore drilling well blowout fluid based on the degree of freedom of the hull, which includes fixing all the inclination measuring devices on the hull at equal intervals along the hull direction of the observation ship, and all the inclination measuring devices are at the same height along the same straight line Arrangement; place the small telescopes of all inclination measuring devices horizontally, and align them with the low point of the blowout fluid at the same time, adjust the high point observation mirrors of all inclination measuring devices to align with the high point of the blowout fluid, so that the high point of the blowout fluid is horizontally introduced Corresponding small telescope; based on the observation inclination angle of each observation point and the hull state information of the observation ship, the height of the blowout fluid liquid column is calculated. The invention converts the liquid column height, which is difficult to measure directly, into three inclination measurements. In this process, only the angle of the high point of the blowout liquid column needs to be measured, and the actual distance to the platform is not required, which reduces the impact on the measurement distance of the laser pulse instrument due to harsh sea conditions. environment error.

Description

technical field [0001] The invention relates to a method for measuring the liquid column height of blowout fluid in offshore drilling based on the hull degree of freedom, and relates to the field of offshore oil and gas well drilling. Background technique [0002] The world's marine oil resources are rich in reserves, accounting for 34% of the world's total oil resources. With the development of offshore oil and gas exploration and development technology, offshore oil and gas production has risen steadily and has become a new source of growth in world oil and gas production. However, offshore drilling and exploitation of oil and gas resources is a typical high-return, high-risk investment project. Once a blowout accident occurs on the drilling platform , will cause huge economic losses, casualties and ecological disasters. For example, in 2010, the Deepwater Horizon drilling platform blowout explosion in the Gulf of Mexico in the United States lasted 87 days and was rescued ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C3/20
CPCG01C3/20
Inventor 耿亚楠董星亮任美鹏刘书杰周建良孙东征张兴全杨向前夏强岳家平
Owner CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD