Spoolable flexible hydraulically set, straight pull release well packer

a flexible, hydraulically set technology, applied in the direction of drilling casings, drilling pipes, borehole/well accessories, etc., can solve the problems of complex installation, increased equipment requirements, and increased complexity of well control equipmen

Inactive Publication Date: 2000-01-25
CAMCO INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is directed to a spoolable, flexible coiled tubing completion system which includes a flexible coiled tubing having an outer wall and a bore therethrough in which the outer wall has a continuous outer diameter without upsets and the bore is adapted to pass wireline tools. The system may include one or more of the following completion components: a longitudinally flexible safety valve, a longitudinally flexible annular control valve positioned in the coiled tubing, one or more longitudinally flexible gas lift valves positioned in the coiled tubing, a longitudinally flexible isolation packer positione

Problems solved by technology

Furthermore, various specialized well control equipment, such as pack-offs and BOP stacks, were required because of the external upsets in the installatio

Method used

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  • Spoolable flexible hydraulically set, straight pull release well packer
  • Spoolable flexible hydraulically set, straight pull release well packer
  • Spoolable flexible hydraulically set, straight pull release well packer

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Embodiment Construction

While the spoolable coiled tubing completion system of the present invention will be described, for purposes of illustration only as including a tubing retrievable safety valve, an annular safety valve, one or more concentric gas lift valves, an isolation packer, a landing nipple, a sliding sleeve, a production packer and a pump out plug, many completion systems may utilize only some of this equipment depending upon the particular application.

Referring now to FIGS. 1A-1U, the spoolable coiled tubing completion system of the present invention is best seen and is referred to by the reference numeral 10 and is installed and retrieved though a retrieval system generally indicated by the reference numeral 12 (FIG. 15). The completion system 10 is installed and retrieved by the retrieval system 12 which generally includes a mobile truck and power unit 14 having a conventional coiled tubing reel 16 which inserts and removes the completion system 10 through a guide arch 18, an injector head...

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Abstract

A coiled tubing completion system is provided with a plurality of completion apparatus, all of which is designed flush with the diameter of the coiled tubing outside diameter for avoiding upsets and are flexible, spoolable on a coiled tubing reel and having through bores large enough to pass wireline tools for performing other operations. The spoolable coiled tubing system may use standard coiled tubing well control equipment and can be used in live wells. The flush, flexible, spoolable and through bore completion equipment may include a tubing retrievable safety valve, an annular control valve, concentric gas lift valves, a zone packer, a landing nipple, a sliding sleeve, and may include at the end a non-flexible but flush and open bore production packer and pump out plug. The completion system may be retrieved through a retrieval system.

Description

BACKGROUND OF THE INVENTIONThe present invention is directed to a method and apparatus for completion or recompletion of oil and / or gas wells with spoolable, flexible coiled tubing and retrieving the same.In place of conventional drilling rigs or workover rigs, completions or recompletions of conventional oil and gas wells by coiled tubing have been disclosed in U.S. Pat. No. 4,844,166. However, the various completion equipment utilized, such as safety valves, gas lift mandrels and packers are rigid tools placed in the coiled tubing while the coiled tubing is being inserted into the well. In addition, the various completion equipment components are of a larger diameter than the coiled tubing (called upset). Since the completion equipment is rigid and has a larger outside diameter than the coiled tubing, these characteristics prevent the completion equipment from being run through a coiled tubing injector head. Therefore, equipment including windows must be provided to couple and spl...

Claims

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Application Information

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IPC IPC(8): E21B19/00E21B19/22E21B34/06E21B34/00E21B34/10E21B23/02E21B23/00E21B33/12E21B43/12E21B17/20E21B33/04E21B33/068E21B43/00
CPCE21B17/20E21B19/22E21B23/02E21B33/12E21B34/06E21B34/10E21B43/122
Inventor PRINGLE, RONALD E.
Owner CAMCO INT
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