Probes for measuring formation pressure

A technology of formation pressure and measurement components, which is applied in the direction of measurement, wellbore/well components, earthwork drilling and production, etc. It can solve problems such as stuck pipe and probe cannot be retracted normally, and achieves the effect of being easy to be cut off

Active Publication Date: 2016-08-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention proposes a probe for measuring formation pressure, which can solve the problem of drill sticking caused by the failure of the probe to be retracted normally

Method used

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  • Probes for measuring formation pressure
  • Probes for measuring formation pressure
  • Probes for measuring formation pressure

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Experimental program
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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing.

[0026] figure 1 A probe 10 for measuring formation pressure according to the present invention is schematically shown. The probe 10 for measuring formation pressure includes a casing 16, and a first protruding hole 17 is arranged on the peripheral wall of the casing 16. Inside the housing 16 a measuring assembly is mounted.

[0027] The measuring assembly comprises an axially mounted piston cylinder 15 , ie the axis of the piston cylinder 15 is perpendicular to the axis of the housing 16 . A second protruding hole 18 is provided on the first end of the piston cylinder 15 facing outward, and the second protruding hole 18 is radially aligned with the first protruding hole 17 . The second end of the piston cylinder 15 lying opposite the first end is closed with an end cap 60 . A cylindrical guide structure 61 for guiding the movement of the piston 20 and the filter 30 desc...

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Abstract

The invention relates to a probe for measuring formation pressure. The probe comprises a shell, a measuring component mounted inside the shell, and a piston, a first extending hole is arranged on the peripheral wall of the shell, the measuring component comprises an axially-mounted piston cylinder, a second extending hole aligning at the first extending hole is arranged on a first end portion, facing the outer side, of the piston cylinder, a second end portion, positioned on the opposite side of the first end portion, of the piston cylinder is closed by an end cap and provided with a fluid passage axially penetrating the end cap, the piston is arranged in the piston cylinder and can penetrate the first extending hole and the second extending hole to reciprocate, a through hole penetrating the piston is arranged along the axial direction of the piston, and a first notch capable of aligning at the peripheral wall of the shell is arranged on the outer surface of the peripheral wall of the piston. By the probe, the problem of pipe sticking caused by the fact that a probe cannot be normally withdrawn can be solved, and well drilling safety is improved.

Description

technical field [0001] The invention relates to a device for measuring formation pressure, in particular to a probe for measuring formation pressure while drilling. Background technique [0002] Formation pressure is an important parameter required by drilling engineering. Real-time formation pressure data can be used to optimize mud gravity and equivalent circulation density to prevent kicks, blowouts, formation damage or accidental formation fracturing and circulation loss, and can also help to correct algorithms for predicting formation pressure. At the construction site, the use of formation pressure data obtained in real time can improve drilling efficiency, make better field decisions, and update geological models in a timely manner. [0003] In order to obtain formation pressure data in real time and accurately, the formation pressure measurement device is usually used to measure the formation pressure data while drilling. The key element in the formation pressure m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/06E21B49/00
Inventor 牛新明郑俊华刘汝山王磊王彦祺沈建中钱德儒宗艳波杨春国高炳堂
Owner CHINA PETROLEUM & CHEM CORP
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