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Multipoint interpolation well diameter scale device

A calibration and interpolation technology, applied in wellbore/well components, measurement, earthwork drilling and production, etc., can solve the problems of scaled well diameter deviation and unfixed adhering posture, so as to ensure the correctness and improve the fitting accuracy

Active Publication Date: 2014-05-07
CNPC GREATWALL DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manual ring scale is not fixed due to the gravity of the pole plate itself, and there is no centering at all due to manual reasons, so the well diameter of the scale deviates far from the actual value

Method used

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  • Multipoint interpolation well diameter scale device
  • Multipoint interpolation well diameter scale device
  • Multipoint interpolation well diameter scale device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Such as figure 1 As shown, the scale device shown is formed by connecting two scale carriages and three scale beams 13 by pins.

[0022] Such as figure 2 As shown, the scale carriage is made up of a centering holder 11, a scale slide bar 12, a slide bar connector 15 and a slide bar connecting rod 16. After the scale sliding frame is assembled, it can be used as an independent component, and there is no need to disassemble it in the subsequent scale. When grading, you only need to put the entire slide frame on the tubular body of the instrument, tighten three fixing screws to fix it, and then start working. The main purpose of the scale slider is to provide precise pin position values. The centering and fixing seat 11 is a ring-shaped structure with a shoulder, and the inner large hole is a positioning hole with a finished size, which is used for automatic centering with the central axis of the instrument body; there are two kinds of threaded holes on the shoulder, o...

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Abstract

The invention relates to a multipoint interpolation well diameter scale device. The multipoint interpolation well diameter scale device comprises a scale beam, and a scale slide frame which is composed of a centering fixing seat, scale slide rods, slide rod connection rods and slide rod connecting heads. The multipoint interpolation well diameter scale device is characterized in that each scale slide rod is provided with a plurality of pin holes with precise location degrees, the scale beam is connected with the scale slide frame through a tight fit pin, and the scale beam simulates a life-size wellbore. The multipoint interpolation well diameter scale device has a self centering function and improves precision.

Description

technical field [0001] The invention relates to a borehole calibration device, in particular to a wellbore calibration device which is more suitable for application on petroleum logging instruments with wall-attached polar plates. Background technique [0002] A typical petroleum logging instrument with wall-attached plates is a micro-resistivity scanning imaging instrument. The typical structural principle of this type of instrument probe is to push multiple measuring plates to the Close to the well wall, the sensor in the measuring plate transmits formation parameter information in the form of coupled electrical signals to the electronic circuit part for processing, and finally the computer interpolates and reproduces the collected signals into an intuitive image As the basis for the analysis of stratigraphic geological interpreters. [0003] Based on the accuracy of formation reproduction and the need to be close to the well wall, the pole plate for wall-mounted measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/08
Inventor 韦海王黄涛刘越魏威
Owner CNPC GREATWALL DRILLING ENG
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