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Formation testing probe

A technology for formation testing and plugging, which is applied in measurement, wellbore/well parts, earthwork drilling and production, etc. It can solve the problem that the seat seal body is easy to fall off, etc., and meet the needs of fluid suction, good strength performance, and increased thickness. Effect

Active Publication Date: 2018-08-14
CHINA NAT OFFSHORE OIL CORP +1
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  • Description
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  • 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 testing probe comprising a probe base body, a filter cartridge and a setting assembly. The probe base body comprises a fixing bush, a hydraulic pipeline and a fluidpipeline; the filter cartridge is arranged outside the fluid pipeline in a sleeving mode and comprises a sampling opening; the setting assembly comprises a packing bush, a pushing-abutting sleeve, a pushing-abutting seat and a setting body; the packing bush is arranged in the fixing bush in a sleeved mode and can slide relative to the fixing bush; the pushing-abutting sleeve is arranged in the packing bush in a sleeved mode and can slide relative to the packing bush; and the pushing-abutting sleeve is fixedly connected with the setting body through the pushing-abutting seat, and the setting body is located on the inner side of the packing bush. The formation testing probe can be applied to the technical field of downhole drilling, and the packing protecting effect on the setting body is achieved by arranging the setting body, so that slurry scouring force applied to the joint of the setting body and the pushing-abutting seat and the scouring area are decreased; the problem that a setting body is prone to falling off, and consequently setting fails is solved; and the formation testing probe has the advantages that setting performance is good, setting reliability is high, and the service life of the setting body is long.

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 Applications(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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