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A Drilling Caliper Measurement System Applicable to Working Conditions While Drilling

A technology of borehole caliper measurement and working conditions, which is applied in the directions of measurement, wellbore/well components, earthwork drilling and production, etc. It can solve the problems of shrinking borehole diameter, expanding borehole diameter, and inability to identify cuttings beds, etc., and achieve stable borehole wall , Guarantee the effect of increasing speed and improving efficiency, and ensuring the safety of drilling operations

Active Publication Date: 2021-10-22
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only the average borehole diameter value can be obtained, and it is impossible to accurately identify the "blocks" and "debris beds", because "blocks" cause the diameter to expand, and "debris beds" cause the diameter to shrink

Method used

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  • A Drilling Caliper Measurement System Applicable to Working Conditions While Drilling
  • A Drilling Caliper Measurement System Applicable to Working Conditions While Drilling
  • A Drilling Caliper Measurement System Applicable to Working Conditions While Drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] see figure 1 , a drilling caliper measurement system suitable for working conditions while drilling, including a caliper measurement unit, a downhole data transmission unit and a surface interpretation unit, the caliper measurement unit is installed on the outer wall of the drill collar, and the caliper measurement unit It includes a power supply module 1, a caliper measurement analysis module 2 and an azimuth measurement module 3, the downhole data transmission unit includes a caliper data encoding module 4 and a caliper data transmission module 5, and the ground interpretation unit includes a caliper data decoding module 6 and real-time caliper reconstruction module 7; the caliper data transmission module 5 and the caliper data decoding module 6 carry out signal transmission through the MWD mud pulse, and the caliper measurement and analysis module 2, the azimuth measurement module 3, the caliper data encoding The module 4 and the real-time borehole reconstruction mod...

Embodiment 2

[0036] see Figure 1-Figure 2 , a drilling caliper measurement system suitable for working conditions while drilling, including a caliper measurement unit, a downhole data transmission unit and a surface interpretation unit, the caliper measurement unit is installed on the outer wall of the drill collar, and the caliper measurement unit It includes a power supply module 1, a caliper measurement analysis module 2 and an azimuth measurement module 3, the downhole data transmission unit includes a caliper data encoding module 4 and a caliper data transmission module 5, and the ground interpretation unit includes a caliper data decoding module 6 and real-time caliper reconstruction module 7; the caliper data transmission module 5 and the caliper data decoding module 6 carry out signal transmission through the MWD mud pulse, and the caliper measurement and analysis module 2, the azimuth measurement module 3, the caliper data encoding The module 4 and the real-time borehole reconstruc...

Embodiment 3

[0039] see Figure 1-Figure 3 , a drilling caliper measurement system suitable for working conditions while drilling, including a caliper measurement unit, a downhole data transmission unit and a surface interpretation unit, the caliper measurement unit is installed on the outer wall of the drill collar, and the caliper measurement unit It includes a power supply module 1, a caliper measurement analysis module 2 and an azimuth measurement module 3, the downhole data transmission unit includes a caliper data encoding module 4 and a caliper data transmission module 5, and the ground interpretation unit includes a caliper data decoding module 6 and real-time caliper reconstruction module 7; the caliper data transmission module 5 and the caliper data decoding module 6 carry out signal transmission through the MWD mud pulse, and the caliper measurement and analysis module 2, the azimuth measurement module 3, the caliper data encoding The module 4 and the real-time borehole reconstr...

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Abstract

The invention discloses a drilling caliper measurement system suitable for working conditions while drilling, which belongs to the technical field of oil and gas drilling, and is characterized in that: the caliper measurement unit includes a power supply module, a caliper measurement analysis module and an azimuth measurement module, and the downhole data The transmission unit includes a caliper data encoding module and a caliper data transmission module, and the surface interpretation unit includes a caliper data decoding module and a real-time caliper reconstruction module; The module decodes the azimuth information and caliper data, and the real-time caliper reconstruction module draws the condition of the downhole wall according to the azimuth information and the caliper data, and generates the shape of the downhole caliper. The invention can realize the measurement of the average well diameter and the azimuth well diameter, and can accurately identify "dropped blocks" and "cuttings beds", thereby ensuring the safety of drilling operations and increasing the speed and efficiency in oil and gas exploration and development.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a drilling caliper measurement system suitable for working conditions while drilling. Background technique [0002] There are two types of caliper measurement: contact and non-contact. Due to the limited working conditions while drilling, only non-contact measurement can realize real-time measurement of caliper. [0003] The caliper tools used in most caliper logging are usually conventional wireline caliper tools, which have high cost and low efficiency. A variety of ultrasonic caliper logging while drilling methods have been proposed in the prior art, which can better overcome the disadvantages of conventional wireline caliper tools. [0004] At present, it is a mature technology to detect borehole wall information by ultrasonic reflection method. Ultrasonic caliper measurement while drilling, regardless of the measurement method of single, two or three ultrasoni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/085E21B47/12
CPCE21B47/12
Inventor 李雷白璟黄崇君贾利春邓虎范黎明李伟成姚建林何弦桀刘殿琛周杨连太炜韩雄刘伟陈科旭
Owner BC P INC CHINA NAT PETROLEUM CORP
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