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Micro mud floating electronic pressure gauge, working method thereof, and pressure measurement device

A floating type pressure gauge technology, which is applied to the temperature device and real-time measurement of downhole pressure, can solve the problems that ordinary storage pressure gauges cannot recover data in time and cannot work stably E-MWD, etc., and achieve simple structure, low cost, high precision effect

Active Publication Date: 2014-04-30
CHENGDU HAOHAN WELL COMPLETION & LOGGING SCI & TECH
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  • Application Information

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Problems solved by technology

The purpose of the present invention is to solve the problem that the pressure measurement while drilling (PWD) cannot work stably when the gas holdup rate is high in the existing aerated underbalanced mud drilling, and the E-MWD is affected by the formation resistivity, and the ordinary storage pressure gauge cannot be recovered in time For the problem of data, provide a micro-storage electronic pressure gauge under mud drilling conditions, its working method, and pressure measurement device, and recover the downhole pressure and temperature measurement data in time through mud circulation

Method used

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  • Micro mud floating electronic pressure gauge, working method thereof, and pressure measurement device
  • Micro mud floating electronic pressure gauge, working method thereof, and pressure measurement device

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[0034] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0035] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0036] Such as figure 1 As shown, CR626 lithium-manganese button battery 12, single-chip microcomputer 4, circuit board 5, connection block 13, pressure chip 7 are stacked in order from bottom to top in aluminum alloy casing 9, and the negative electrode of the battery is connected to the negative electrode on the back of single-chip microcomputer 4 2, the single-chip microcomputer 4 is welded to the circuit board 5, and the data read-write e...

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Abstract

The invention discloses a micro mud floating electronic pressure gauge, a working method thereof, and a pressure measurement device, relates to the field of oil and gas extraction, and aims to provide a device for measuring underground pressure and temperature in the mud drilling process in real time, and a working method thereof. The technical key point is that: a button cell, a singlechip with acquisition software, a circuit board, a connection block, and a pressure chip are stacked in a shell sequentially from bottom to top; the shell is a cylindrical shell of which the upper and lower ends are provided with openings, and the interior and the exterior of the shell are isolated by isolation protective adhesive; the pressure gauge acquires temperature and pressure information intermittently under a well; and the pressure measurement device comprises the pressure gauge, a data loading system, and a pressure and temperature calibrating device. The pressure gauge is as small as drill cuttings, so the pressure gauge can float in mud and move along with mud, measure pressure timely and recover data, and does not influence the drill construction.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation, in particular to a device and working method for real-time measurement of downhole pressure and temperature during mud drilling. Background technique [0002] Mud underbalanced drilling and managed pressure drilling, especially air-filled managed pressure drilling, have been popularized and applied in recent years. There are also many problems, especially the situation that the bottomhole pressure cannot be measured in time and the underpressure can be judged under the condition of a large amount of gas inflation. The following are some common practices for measuring downhole pressure and temperature during mud drilling: [0003] Utilize mud pulse transmission signal - the measurement of bottom hole pressure (PWD) while drilling in mud wells uses mud pulse transmission signal. This technology is very mature. The disadvantage of this technology is that the mud wave signal is greatly attenu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/06
Inventor 陈一健孟英峰李永杰陈星宇李诚
Owner CHENGDU HAOHAN WELL COMPLETION & LOGGING SCI & TECH
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