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Pressure-while-drilling measuring device and measurement method thereof

A measuring instrument and formation pressure technology, applied in the field of pressure measuring instruments and its measurement, can solve the problems that the formation pressure data is not real-time, and the formation pressure can not be monitored in real time while drilling, so as to achieve easy start-up and shutdown, avoid the difficulty of going into the well, The effect of reducing volume

Active Publication Date: 2011-07-13
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

Although conventional wireline formation testing can measure formation pressure, its biggest disadvantage is that the measured formation pressure data is not real-time. Therefore, in complex geological environments, real-time monitoring of formation pressure while drilling cannot be effectively performed to prevent downhole accidents However, using the formation pressure measuring instrument while drilling to predict the downhole pressure at any time is an effective way to solve this problem

Method used

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  • Pressure-while-drilling measuring device and measurement method thereof
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  • Pressure-while-drilling measuring device and measurement method thereof

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 As shown, the present invention includes an outer casing 1 of the device, and a central flow channel 2 is arranged in the outer casing 1 . The outer casing 1 is provided with a diverting and pressurizing mechanism 3 , an actuator 4 and an oil circuit reversing mechanism 5 in sequence. The actuator 4 is provided with a suction mechanism 6 .

[0017] Such as figure 2 As shown, the flow splitting pressurization mechanism 3 includes a splitter tube 31 arranged in the outer shell 1, a splitter channel 32 is arranged between the splitter tube 31 and the outer shell 1, and the inlet end of the splitter tube 31 is provided with a communication splitter channel 32 and a central flow channel. Channel 2 split inlet 33. A hollow splitter piston 34 is arranged in the splitter cylinder 31 , a spring 35 is arranged between the splitter p...

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Abstract

The invention relates to a pressure-while-drilling measuring device and a measurement method thereof. The pressure-while-drilling measuring device is characterized by comprising an outer shell in which a central flow channel is formed; the outer shell is provided with a split-flow pressurization mechanism, an execution mechanism and an oil line reversing mechanism sequentially; the execution mechanism is provided with a pumping mechanism; the split-flow pressurization mechanism controls the opening and closing of the execution mechanism by using the acting force of slurry in the central flow channel and a split-flow piston; and the execution mechanism and the oil line reversing mechanism are matched with each other to push out and reset all sliding blocks in the pumping mechanism, so thatthe stretching and retraction of a probe can be realized, and bottom fluid is pumped by a pumping cylinder and a piston rod of the pumping mechanism and is measured. The pressure-while-drilling measuring device can accurately acquire the underground formation pressure in real time, staff can timely identify the complex underground geological factors by using the formation pressure data and further adjust the drilling parameters, and the complex conditions of leakage, collapse, overflowing, blowing and the like during drilling can be effectively avoided, so that the pressure-while-drilling measuring device can be widely used in the drilling process.

Description

technical field [0001] The invention relates to a pressure measuring instrument and a measuring method thereof, in particular to a pressure-while-drilling formation measuring instrument (PWD) and a measuring method thereof applied in the field of petroleum exploration and development. Background technique [0002] In recent years, petroleum exploration and development have shifted from conventional geological environment formations to unconventional geological environment formations. Due to the complex geological factors (high temperature, high pressure, etc.) in the unconventional geological environment, the safety of oil drilling is seriously threatened. Among them, formation pressure is the most important factor, but how to obtain formation pressure data accurately and in real time is a technical difficulty. Although conventional wireline formation testing can measure formation pressure, its biggest disadvantage is that the measured formation pressure data is not real-ti...

Claims

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Application Information

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IPC IPC(8): E21B47/06E21B49/00
Inventor 姜伟陈平蒋世全黄万志夏宏泉朱荣东胡泽许亮斌刘健郑华林韩雄
Owner CHINA NAT OFFSHORE OIL CORP
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