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A ground test probe

A technology of formation testing and plugging, which is applied in measurement, wellbore/well components, construction, etc., can solve the problem that the seat seal body is easy to fall off, etc., and achieve the effect of improving the scope of application, increasing the service life and reducing the stress

Active Publication Date: 2021-12-10
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a formation test probe with good sealing performance and high sealing reliability to solve the technical problem that the sealing body is easy to fall off

Method used

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Embodiment Construction

[0040] In order to solve the technical problem that the sealing body is easy to fall off in the prior art and cause the sealing failure, the present invention provides a formation test probe with good sealing performance and high sealing reliability. The advantages are clearer, and the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0041] figure 1 It is a structural schematic diagram of the initial state of the formation testing probe 100 according to an embodiment of the present invention, from figure 1 It can be seen from the figure that the formation testing probe 100 provided by the embodiment of the present invention includes a probe base 1 , a filter cartridge 2 and a sealing assembly. The probe base 1 includes a fixed sleeve...

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Abstract

The invention provides a formation test probe, which includes a probe base, a filter cartridge and a seat seal assembly, the probe base includes a fixed sleeve, a hydraulic pipeline and a fluid pipeline; the filter cartridge is set outside the fluid pipeline, and the filter cartridge includes a sampling port The seat seal assembly includes a packing sleeve, a push sleeve, a push seat and a seat seal body. The packing sleeve is set in the fixed sleeve and can slide relative to the fixed sleeve. It can slide relative to the packing sleeve, and the pushing sleeve is fixedly connected with the seat seal body through the pushing seat, and the seat seal body is located inside the packing sleeve. The present invention can be applied to the technical field of downhole drilling. By arranging the packing sleeve, the seat seal body can be sealed and protected, so as to reduce the mud scouring force and the scouring area of ​​the connection between the seat seal body and the push seat, and solve the problem of The seat seal body is easy to fall off, causing the seat seal to fail. The invention has the advantages of good seat seal performance, high seat seal reliability and long service life of the seat seal body.

Description

technical field [0001] The invention relates to the technical field of downhole drilling, in particular to a formation testing probe. Background technique [0002] When the formation tester is working downhole, the hydraulic system first drives the elastic seating body in the formation testing probe to isolate the target formation from the external mud to realize the seating; then the formation fluid is sucked into the formation tester instrument through the fluid channel, It is used to detect formation parameters. In practical engineering applications, it is found that the seat seal body is prone to cracks at the connection between it and the seat seal body fixing seat. The crack accelerates to expand, and finally causes the entire body of the seat seal to fall off, causing the seat seal to fail, and then causes the external mud to flow into the probe, resulting in the inability to accurately measure the formation parameter results. Drilling and logging engineering progre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00E21B47/00E21B47/017
CPCE21B47/00E21B49/00E21B47/017
Inventor 鲍忠利黄琳于会媛余强秦小飞
Owner CHINA NAT OFFSHORE OIL CORP
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