Elastic sieve pipe and sand prevention pipe column

A technology of sand control pipe and elastic screen, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve problems such as affecting the production of oil wells in the development of blocks, and achieve the effect of overcoming poor neutrality

CN109138933AActive Publication Date: 2019-01-04PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-04

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Abstract

The invention discloses an elastic sieve pipe and a sand prevention pipe column. The elastic sieve pipe comprises a central slotted sieve pipe, a pressure transmitting piece, a supporting cylinder sleeve, a reset mechanism, and an outer-layer slotted sieve pipe; the outer side of the upper end of the central slotted sieve pipe is fixed to the lower end of an upper joint through a central sieve pipe coupling, a control pin and an upper cylinder body, and the lower end of the central slotted sieve pipe is fixedly connected with the upper end of a lower joint; the pressure transmitting piece is arranged outside the central slotted sieve pipe in a sleeving mode, and an upper expansion mechanism and a lower expansion mechanism are arranged at the two ends of the pressure transmitting piece correspondingly; the supporting cylinder sleeve and the reset mechanism are arranged between the lower expansion mechanism and the lower joint; the two ends of the outer-layer slotted sieve pipe are positioned through sieve pipe protecting sleeves, and the middle of the outer-layer slotted sieve pipe is matched with the upper expansion mechanism and the lower expansion mechanism; and when the pipe column is tripped, the control pin is sheared off, the gravity of the pipe column is transmitted to the upper expansion mechanism and the lower expansion mechanism, and thus the elastic sieve pipe is set. According to the elastic sieve pipe and the sand prevention pipe column, it can be ensured that set sand is basically avoided in a wellbore, the good sand prevention effect is achieved, the pump inspection cycle is effectively prolonged, meanwhile, during using, tripping and salvaging operation is easy and convenient, safety and reliability are achieved, and the cost is low.
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Description

technical field

[0001] The invention relates to the technical field of oil field sand control technology, in particular to an elastic screen pipe and a sand control pipe string. Background technique

[0002] For oil and gas reservoirs whose reservoirs are mostly unconsolidated sandstone, there is generally a serious problem of sand production, and necessary sand control measures must be taken during the production process.

[0003] At present, mechanical sand control is mainly completed by running various screens in the casing. When the screen is run in the casing, a sand blocking well wall can be established between the casing and the screen to prevent the formation sand from entering the screen, thereby reducing pump jamming. After the formation sand is spit out, a void will be formed around the borehole wall, which will easily cause collapse and damage to the casing. In addition, during operation, because the screen pipe in the casing is buried in sand, it is difficult ...

Examples

Embodiment Construction

[0045] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0046]Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application.

[0047] It should be noted that when an element is referred to as being “di...