Annulus multi-stage sampling sand tester
A technology of sand measuring instrument and style, which is applied in the direction of wellbore/well components, earth cube drilling and production, etc., and can solve the problems of not being able to take samples in different layers and take one sample
Active Publication Date: 2021-05-07
PETROCHINA CO LTD +1
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Problems solved by technology
[0003] In order to overcome the shortcomings of the existing sampling sand measuring instrument that can only take one sample in the sand layer at one time, and cannot take samples in layers and perform quantitative analysis, the present invention provides a sand measuring instrument with multi-stage sampling in the annulus. The graded sand detector can take samples in multiple layers and perform quantitative analysis
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[0016] The present invention will be further described below in conjunction with accompanying drawing:
[0017] Depend on Figure 1 to Figure 7 As shown in the figure, a sand measuring instrument with multi-stage sampling in the annular space includes a micro-motor push rod mechanism 1, a central tube 4, and a collector umbrella 7 is arranged outside the central tube 4, and the output rod at the bottom of the micro-motor push rod mechanism 1 is Connected with a push rod 2, the micro-motor push rod mechanism 1 can convert the rotary motion of the DC micro-motor into the linear motion of the push rod 2 through the screw rod, and control it by supplying positive and negative direct current and upper and lower dead center micro switches The reciprocating movement of the push rod 2 drives the retraction of the flow collecting umbrella 7 at the same time.
[0018] The central tube 4 is tubular, and the diameter of the upper section is smaller than that of the lower section, wherein...
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The invention relates to an annular space multi-stage sampling sand measuring instrument. The method mainly solves the problem that the existing sampling sand measuring instrument can only take one sample in the sand producing layer at one time, and cannot take samples in different layers and perform quantitative analysis. It is characterized in that: the bottom of the micro-motor push rod mechanism (1) is connected with a push rod (2), the center tube (4) is equipped with a slide rod sleeve (10), a slide rod sleeve (10) and a fixed sleeve (6) A control rod (5) is provided inside the control rod (5), and a limit sleeve (8) is provided on the bottom of the convex edge of the control rod (5). 11) There are several sand sample spacers at the bottom, the guide rod (16) is connected to the bottom of the slide rod sleeve (10), and the outer surface of the lower section of the control rod (5) is provided with a circumferential ring groove; the central tube (4) The bottom is connected with a sand collection tube (17). The multi-stage sand sampling instrument for annulus can take multi-stage and layered samples and perform quantitative analysis.
Description
technical field [0001] The invention relates to the field of well logging in oil fields, in particular to a sand measuring instrument for annular space multi-stage sampling. Background technique [0002] Some oil wells and gas wells in domestic oilfields undergo a period of production or operation transformation, and some production layers will discharge sandy particles along with the produced liquid or gas. These sandy particles mainly come from the formation of the production well itself and the production well. It is of great significance for the operation and stimulation of such wells to test and understand the sand production law of each layer of the production well. At present, the instruments used for sand production testing and sampling in production wells mainly include a single-stage sand sampling instrument. Due to the limitation of structure and other factors, this sampling sand testing instrument can only take one sample from the lower part of the sand productio...
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IPC IPC(8): E21B49/02
CPCE21B49/02
Inventor 刘慧东庄海军张永余孙冠男季小磊
Owner PETROCHINA CO LTD