Downhole settled sand fishing tool

A salvage tool, sand settling technology, applied in wellbore/well components, earthwork drilling and other directions, can solve the problems of not allowing, affecting, not meeting the requirements of horizontal wells, etc., to avoid well killing, ensure wellbore, and ensure cleanliness Effect
CN107956444AInactive Publication Date: 2018-04-24CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2018-04-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a downhole settled sand fishing tool. The downhole settled sand fishing tool comprises a fishing cylinder, a liquid discharge bin and a suction machine. The fishing cylinder is used for containing settled sand, and a cover which is unidirectionally opened toward the interior of the fishing cylinder is arranged at the upstream end of the fishing cylinder; the liquid discharge bin is in liquid communication with the downstream end of the fishing cylinder, a filter is arranged between the liquid discharge bin and the fishing cylinder, and the liquid discharge bin is further directly communicated with the external environment; the suction machine drives the liquid of the liquid discharge bin to flow out continuously, so that liquid, with settled sand, in the external environment flows into a fishing bin continuously. According to the downhole settled sand fishing tool, downhole liquid can circularly flow into and out of the tool, the liquid with the settled sand stays in the tool, and accordingly settled sand fishing is achieved.
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Description

technical field

[0001] The invention relates to the field of petroleum engineering, in particular to an in-well sand setting and fishing tool. Background technique

[0002] At present, oil and gas wells are generally completed by multi-stage and staged fracturing. After a long period of production, fracturing sand or flowback sand (referred to as sand settling) will accumulate in the wellbore, which will adversely affect the productivity of a single well. This adverse effect is especially pronounced for horizontal wells. For example, during the production profile test, the accumulated sand in the well can cause the test tool to be unable to run in place, and the sand at the bottom of the hole will have a negative impact on the measuring instrument.

[0003] Since it is not allowed to inject liquid into the horizontal well of the production well to prevent the well from being killed, the sand washing method of the prior art cannot meet the requirements of the horizontal well...

Claims

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