Method and device for measuring downhole formation fluid pressure

A formation fluid and pressure technology, applied in the direction of measurement, earthwork drilling and production, wellbore/well components, etc., can solve the problems of inaccurate measurement and inability to meet the needs of pressure measurement, so as to reduce impact, save energy consumption, increase The effect of pushing force

Active Publication Date: 2019-09-13
BEIJING LIUHE GREATNESS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, this patent cannot meet the needs of formation pressure measurement at different depths and different fluidities, and there is a problem of inaccuracy

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  • Method and device for measuring downhole formation fluid pressure
  • Method and device for measuring downhole formation fluid pressure
  • Method and device for measuring downhole formation fluid pressure

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "another end" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that ...

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Abstract

The invention discloses a method and device for measuring downhole formation fluid pressure. The device comprises ground equipment and downhole apparatus, wherein the downhole apparatus is connected with the ground equipment; the ground equipment comprises a vertical pipe, a three-way pipe is installed on the vertical pipe, a pressure sensor is installed at the position of the three-way pipe, thepressure sensor is connected with a wireless pressure sensor main machine through a data line, the wireless pressure sensor main machine is connected with a sucker antenna, the sucker antenna is in signal connection with a wireless transceiver, and the wireless transceiver is connected with a data processing meter; and the downhole apparatus comprises a thrust assembly, and a thrust module and a probe module are installed on the thrust assembly. According to the method and device for measuring the downhole formation fluid pressure, the magnitude of different thrust force is set according to different well depths, when shallow well measurement is carried out, the energy consumption of the downhole apparatus can be reduced, and meanwhile, the risk of pressure damage to the well wall due to too large thrust force is reduced; and when deep well measurement is carried out, the thrust force is reasonably increased to enable the seal between a sealing probe and a well wall mud cake to be reliable, the influence of annulus pressure on formation fluid is reduced, and thus the accuracy of the measurement is improved.

Description

technical field [0001] The invention relates to the technical field of downhole instruments, in particular to a method and device suitable for measuring downhole formation fluid pressure. Background technique [0002] Chinese patent CN106555582A "A Device for Measuring Formation Pressure While Drilling and a Method for Measuring Formation Pressure" discloses a device for measuring formation pressure while drilling and a method for measuring formation pressure. The decompression piston chamber and the measuring chamber arranged on one side of the decompression piston chamber and connected to the decompression piston chamber; the probe and the pressure sensor are tubular and the inner cavity is connected to the decompression piston chamber. The probe of the pressure sensor is arranged in the inner cavity or communicated with the inner cavity; and a hydraulic drive system. The device for measuring formation pressure while drilling has simple structure and convenient operation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/06E21B49/00
CPCE21B47/06E21B49/00
Inventor 冯建宇杨勇董学嵩
Owner BEIJING LIUHE GREATNESS TECH
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