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Totally closed downhole pressure gauge

A downhole pressure and fully enclosed technology, applied in the field of pressure gauges, can solve problems such as poor sealing of pressure gauges, and achieve the effect of ensuring the isolation effect

Inactive Publication Date: 2016-10-12
方永和
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem of poor sealing of existing pressure gauges, it is difficult to effectively seal for a long time under high pressure, high temperature and strong corrosive gas environment

Method used

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  • Totally closed downhole pressure gauge

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with accompanying drawing:

[0010] As shown in the drawings, the fully enclosed downhole pressure gauge includes a welding electrode 1 , a welding sleeve 2 , and a sensor welding bracket 3 . The welding insulating ring 4 is welded and connected to each other between the welding electrode 1 and the welding sleeve 2, and all connections between the inner cavity of the instrument and the outside are welded. There is a circuit support 6 in the welding sleeve 2, and the upper end of the circuit support 6 is connected to the welding electrode 1 through the rotating connector 5. There is a posture detection circuit 7 and a battery in the circuit support 6. There is a memory and a temperature sensor core on the posture detection circuit 7. The temperature signal is collected and stored, and the instrument uses the attitude detection circuit 7 to detect the working state of the instrument attitude control inst...

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Abstract

The invention discloses a totally closed downhole pressure gauge and mainly solves the problems that a conventional pressure gauge has poor airtightness and cannot keep long-term effective airtightness in environments with high pressure, high temperature and strong aggressive gas. The totally closed downhole pressure gauge is characterized in that a welding insulation ring (4) is arranged between a welding electrode (1) and a welding sleeve (2) for mutual welding connection, a circuit bracket (6) is arranged in the welding sleeve (2), the upper end of the circuit bracket (6) is in circuit communication with the welding electrode (1) through a rotary connector (5), an attitude detection circuit (7) and a battery are arranged in the circuit bracket (6), the attitude detection circuit (7) is in data communication with the outside through the rotary connector (5) and the welding electrode (1), the upper end of a sensor welding bracket (3) is connected with the circuit bracket and welded with the welding sleeve (2), and the lower end is in welding connection with a pressure sensor (8). The totally closed downhole pressure gauge has the characteristics that instrument working states are controlled through attitude detection and good airtightness can be still kept when the downhole pressure gauge is placed at a high pressure, at a high temperature and in strong aggressive gas.

Description

Technical field: [0001] The invention relates to a pressure gauge used in the field of oil production in an oil field, in particular to a fully enclosed downhole pressure gauge. Background technique: [0002] Downhole pressure gauges are frequently used instruments for testing pressure and temperature during oilfield injection and production, such as various storage downhole pressure gauges and direct-reading downhole pressure gauges. No matter what kind of pressure gauge, it is necessary to connect the pressure gauge with cables or wire ropes and put it into the underground for data collection, and there must be various complex fluid media and high pressure and temperature in the underground. However, the existing pressure gauge has the problem of poor sealing due to structural reasons, especially when working for a long time under high pressure, high temperature, and strong corrosive gas environment, the sealing fails. Therefore, once the seal fails, any medium downhole, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/06
CPCE21B47/06
Inventor 方永和
Owner 方永和
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