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Steam-propelling packer

A packer and push-type technology, which is applied in the field of steam-push packers, can solve the problems of long time required for sealing, long telescopic tubes, inconvenient operation, etc., to improve the success rate of setting seal, good sealing effect, well-designed effects

Inactive Publication Date: 2006-08-16
潘昌德
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many types of steam injection thermal recovery packers used in the field, the most important of which are mechanical, thermal expansion and heat-sensitive metal packers. These packers have their own characteristics, but they also have the following disadvantages. It is manifested by low success rate of seat seal or lax seat seal, long time required for seat seal, low isolation pressure, low temperature resistance, difficult to pass coupling during lifting operation, and easy loss of parts at casing deformation, etc. The telescopic tube is long, the operation is inconvenient and the cost is high. Due to the above defects, the effect of the existing thermal recovery packers is affected, and its application is limited.

Method used

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  • Steam-propelling packer

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Embodiment Construction

[0014] The present invention is provided by the following embodiments, and the present invention will be further described below in conjunction with the accompanying drawings.

[0015] In the figure, the upper joint is connected with it through the upper threaded buckle of the central tube. The material of the upper joint 1 is 35CrMo, and the upper inner circle is provided with a 4" partial ladder buckle, and the inner circle of the lower part is 2 7 / 8 "TBG buckle, with 15-20° arc on the outer edge, the central tube 2 is made of 35CrMo, and its upper and lower ends are respectively equipped with 2 7 / 8 "TBG buckle, two groups of seal seats 11,14 are respectively used to seal the pusher 8 on the side wall of the middle part. 7 / 8 "Oil pipe or tailpipe are connected, and the material of rubber tube 3 is a hollow cylinder made of polytetrafluororubber, which is packed into the cavity of protection seat 16. Limit cap 4 and positioning seat 10 are all made of 35CrMo Made o...

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Abstract

A vapor impellent packer, which belongs to packer type of thick oil fill into underground well. This invention is advanced than the existing technologies, which compose of central tube, back bonnet, tube of rubber that are connected with upper adapter by buckle, and mover, expander, piston, spacing hat, spring, location-holder, airtight packing and protective holder. When switch-in the underground well filler pipe, rubber tube can glue on the well wall by the mover and expander which achieve the hermetization and sealed-off. The technology can decrease the accident of underground well, and improve the successful ratio and effect of seat-seal.

Description

Technical field: [0001] The invention belongs to a downhole packer used for the exploitation of heavy oil steam injection wells, in particular to a steam-driven packer. Background technique: [0002] Thermal recovery by steam injection in oil wells is the main development method of heavy oil fields. At present, there are many types of steam injection thermal recovery packers used in the field, the most important of which are mechanical, thermal expansion and heat-sensitive metal packers. These packers have their own characteristics, but they also have the following disadvantages. The performance is that the success rate of the seat seal is low or the seat seal is not strict, the time required for the seat seal is long, the isolation pressure is low, the temperature resistance is low, it is difficult to pass the coupling during the lifting operation, and the parts are easy to be lost at the deformation of the casing, etc. In addition, The telescopic tube is long, and the ope...

Claims

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Application Information

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IPC IPC(8): E21B33/128
Inventor 潘昌德潘琳高侃
Owner 潘昌德
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