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Bypass flow guiding sieve tube

A flow screen and base pipe technology, applied in the direction of production fluid, wellbore/well parts, earthwork drilling and production, etc., can solve the problems of low efficiency of pressure test operation, difficult disassembly and assembly, and high time-consuming operation, and achieve simplified gravel packing pipe Column, easy to operate, safe and reliable, and improve the effect of working time

Pending Publication Date: 2019-05-17
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sand control string of the primary multi-layer gravel packing sand control technology using conventional screens is complex, with high operational risk and high labor intensity. The wellhead connection and pressure test operation efficiency of the outer string and the service string is low. It is difficult to disassemble and assemble, the whole operation is time-consuming, and the cost of re-completion in the later stage is high, and there is no secondary fracturing sand control technology for later overhaul or immobile string

Method used

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  • Bypass flow guiding sieve tube
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  • Bypass flow guiding sieve tube

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Embodiment Construction

[0018] In order to further understand the content of the present invention, the present invention will be further described in conjunction with the accompanying drawings.

[0019] refer to figure 1 , the present invention provides a bypass diversion screen, including a base pipe 101, the two ends of the base pipe 101 are provided with threads, the upper end of which is connected with the tie-back sealing cylinder 103 through a fastening mechanism 201, and the outside of the base pipe 101 A screen assembly 104 is set therein, the upper end of the screen assembly 104 is connected with an upper tie-back sealing joint 301 , and the lower end is connected with a lower tie-back sealing joint 302 .

[0020] refer to Figure 1-Figure 4 , two through-holes 105 are arranged symmetrically on the cylinder wall of the tie-back seal cylinder 103; the fastening mechanism 201 is composed of a bypass collar 202 and a flat key 203; the bypass collar 202 is symmetrically distributed with two T...

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Abstract

The invention belongs to the technical field of oilfield development and production and relates to a bypass flow guiding sieve tube applied to once multiple gravel pack sand control completion operation. The bypass flow guiding sieve tube comprises a tie-back sealing cylinder, a flat key, a bypass coupling, a base tube, a sealing ring, an upper tie-back sealing joint, a screen assembly and a lowertie-back sealing joint. The bypass flow guiding sieve tube provided by the invention has the advantages that the bypass flow guiding sieve tube is connected to an once multiple gravel pack sand control tube column to satisfy circulating passage demand of packing operation and a slicing mining demand during oil production; the whole set of gravel pack tube column can be simplified; a special assorted tool does not need to be additionally arranged; the mounting and connecting operation is simple and convenient; and the integral operation timeliness can be obviously enhanced.

Description

technical field [0001] The invention belongs to the technical field of oil field development and production, and in particular relates to a bypass diversion screen used in a multi-layer gravel packing sand control completion operation. Background technique [0002] There are many unconsolidated or relatively unconsolidated oil and gas reservoirs discovered offshore in my country, and most oil and gas layers have sand production. Sand production will wear and erode surface equipment and downhole tools (such as pumps, separators, heaters, pipelines, etc.), bridge or block wellbore, reduce oil and gas well production or force oil and gas wells to stop production. The development cost of offshore oil and gas fields is high, the life of the platform is limited, and the production capacity of a single well is high. Sand control is one of the key factors to ensure long-term high and stable production of oil and gas wells. [0003] Gravel packing sand control is to form a certain t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/08
Inventor 范白涛左凯徐刚韩耀图陈胜宏杨秋荣包陈义袁伟伟张斌
Owner CHINA NAT OFFSHORE OIL CORP
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