Oilfield oil extraction sampling device and operation method

Abstract

The invention discloses an oilfield oil extraction sampling device and an operation method, and particularly relates to the field of oilfield sampling. The device comprises a sampling circular sleeve,wherein the top of the sampling circular sleeve is movably provided with a piston rod in a sleeving mode, the top of the piston rod is fixedly provided with a magnet, the top of the magnet is magnetically connected with an electromagnet, the top of the electromagnet is fixedly connected with a pneumatic rod, the top of the pneumatic rod is electrically connected with an air pump, the outer portion of the piston rod is movably sleeved with a positioning cover, and the bottom of the positioning cover is sleeved with a sampling inner barrel sleeve in a threaded mode. According to the device andthe method, in the actual operation process, the electromagnet and the air pump are started by a controller, the electromagnet is enabled to generate magnetic force to attract the magnet, at the moment, the air pump lifts the piston rod to ascend, the space in the bottom of a piston is increased, internal air pressure of the sampling inner barrel sleeve is increased, crude oil inside a scraping blade at the bottom of the sampling circular sleeve is extracted, the magnetic force generated by the electromagnet is more stable, and the controllability is strong.

Description

technical field [0001] The invention relates to the technical field of oilfield sampling, and more specifically, the invention relates to an oilfield oil recovery sampling device and an operation method. Background technique [0002] The structure of the existing oil field sampling device is relatively complicated, and several parts need to be controlled at the same time. The oil field sampling device is put into the wellhead for use, and the control state cannot be observed when adjusting the control. Because there are many control parts, sometimes the coordination is not Very flexible, regardless of the effect of use. [0003] The invention patent of patent application publication number CN109000980A discloses an oil field oil recovery sampling device and an operation method. The composition of this product includes: sampling circular sleeve, the upper part of the sampling circular sleeve has a group of oil inlets around the circumference, the inner side of the sampling c...

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Problems solved by technology

[0004] However, in actual use, the device uses magnets to split the air rod, so as to facilitate disassembly and fixation, but the magnetism of the magnet will weaken due to time accumulation, and the greater the strength of the attractive force between the magnets, the more stable it will be. On the contrary, disassembly The difficulty increases accordingly, so the device is difficult to fix and easy to disassemble in the actual use process. In addition, there are solid debris such as stones in the sampling process, which greatly affects the subsequent detection and reduces the detection efficiency.

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