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Desirable Drillable Anchored Packer

A packer and drill-anchor technology, which is applied in the field of drillable anchor packers, can solve problems such as increased construction costs and casing damage, and achieve the effects of avoiding scrapping, increasing the validity period, and reducing the possibility of leakage

Active Publication Date: 2016-09-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, drilling and milling is used for each pipe string, which virtually increases the construction cost, and the drill bit also causes damage to the casing

Method used

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  • Desirable Drillable Anchored Packer
  • Desirable Drillable Anchored Packer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing.

[0021] Such as Figure 1-2 As shown, a drillable anchored packer provided in this embodiment includes an upper joint 1, an inner central pipe 4 connected to the upper joint 1, an outer central pipe 13 sleeved outside the inner central pipe 4, and a lower joint. 18. Slip mechanism, hand-losing mechanism, rubber cartridge sealing assembly, setting mechanism, locking mechanism, upper unsealing and jamming mechanism, lower unsealing and jamming mechanism, oil sleeve connection mechanism, the said hand-losing mechanism includes installation The ring-shaped scissor seat 3 between the lower end of the upper joint 1 and the upper end of the outer central tube 13, the scissor seat 3 is connected with the upper slip seat 5 of the slip mechanism through the scissors 6, and the outer center The pipe 13 is provided with a slip mechanism, a rubber cartridge sealing assembly, and a setti...

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PUM

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Abstract

The invention discloses a drillable anchored packer, which includes an upper joint, an inner center pipe, an outer center pipe and a lower joint. Connected with the upper slip seat of the slip mechanism, a slip mechanism, a rubber cartridge sealing assembly, and a setting mechanism are sequentially arranged outside the outer central tube from top to bottom. The outer flange and the first unsealing pin, the outer flange is configured to be sealed with the inner wall of the outer central tube through a sealing ring, the outer diameter of the outer flange is larger than the inner diameter of the scissor seat, and the upper clip of the slip mechanism The tile seat is fixedly arranged on the upper joint through the first unsealing pin. The invention is simple in operation, reasonable in structure, and integrates anchoring and sealing. Compared with conventional pipe string tools, the number of seals in the pipe string is reduced, and the possibility of leakage is reduced. Milling function, reducing the difficulty of unblocking, saving construction time and cost.

Description

technical field [0001] The present invention relates to a drillable anchored packer. Background technique [0002] During the long-term use of water injection wells, due to downhole salt formation, scaling, corrosion and other factors, downhole pipe strings and tools are buried, slips and anchor claws cannot be retracted, etc., causing pipe strings to get stuck. Special equipment has to be used for salvage and drilling and milling. If the salvage, drilling and milling packer fails, the water well may be scrapped and bring greater economic losses. According to statistics, from January 2010 to August 2011 in Jianghan Oilfield, a total of 103 wells with packer strings were maintained, of which 30 wells were difficult to release. 21 wells resorted to undercut fishing or milling due to the inability to remove the jams. The average construction period was 37 days, and the average time to salvage downhole tools was 11 days. Some wells were completed by overhaul operations, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/129E21B33/128
Inventor 管斌徐峰程忱黄进熊力坤
Owner CHINA PETROLEUM & CHEM CORP