Methods for actuating a downhole tool
a technology of mechanical plugs and downhole tools, which is applied in the direction of borehole/well accessories, drilling casings, pipes, etc., can solve the problems of adding complexity to the system, reducing the safety of field personnel, and preventing manual methods of releasing darts from conventional cementing manifolds in some countries
Inactive Publication Date: 2008-08-14
HALLIBURTON ENERGY SERVICES INC
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Benefits of technology
The patent text describes a method for servicing a well bore by using a launching apparatus to activate a downhole tool positioned in the well. This allows for the pumping of cement slurry into the well to improve its performance. The technical effect of this method is to provide a more efficient and effective way to service well bores.
Problems solved by technology
When operating from a drilling platform, for example, field personnel may be wenched into a harness and suspended from a derrick within reach of the cementing manifold so that such personnel may manually manipulate valves to release darts into the work string at desired times. This manual method of releasing darts creates the risk of injury to field personnel, especially when operating from an offshore floating platform, for example, where wind and waves create additional hazards to personnel suspended in a harness.
Therefore, such manual methods of releasing darts from conventional cementing manifolds are not permitted in some countries, such as Norway, for example.
In addition, remote actuation of the cementing manifold valves to release darts adds complexity to the system, and therefore more cost and less reliability as compared to the traditional manual method using field personnel to manipulate the valves.
Method used
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[0021]A remote launching apparatus and mechanical plugs that may be released into a work string to actuate downhole tools will now be described with reference to the accompanying drawings, wherein like reference numerals are used for like features throughout the several views. There is shown in the drawings, and herein will be described in detail, one embodiment of a remote launching apparatus and two embodiments of mechanical plugs with the understanding that this disclosure is representative only and is not intended to limit the invention to the specific embodiments illustrated and described herein. One skilled in the art will readily appreciate that the remote launching apparatus is not limited to a design that launches any particular number of devices, but may be designed to launch one, two, or more devices, such as mechanical plugs. Moreover, one skilled in the art will understand that the mechanical plugs are not limited to the shapes disclosed herein but may assume many other...
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A method of servicing a well bore comprising positioning a launching apparatus at a location remote from a work string, routing a first mechanical plug through the work string and a tubular, actuating a first cementing plug within the tubular via the first mechanical plug, and pumping a cement slurry into the well bore. A method of servicing a well bore comprising disposing a downhole tool within a work string in the well bore, positioning a launching apparatus remote from the work string, wherein the launching apparatus comprises a first device operable to actuate the downhole tool, and launching the first device into the work string to actuate the downhole tool.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The subject matter of the present application is related to U.S. patent application Ser. No. ______ [Docket No. 2005-IP-017260U2 (1391-64001)] filed ______ and entitled “Systems for Actuating a Downhole Tool,” which is hereby incorporated herein by reference in its entirety for all purposes.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not applicable.REFERENCE TO A MICROFICHE APPENDIX[0003]Not applicable.FIELD OF THE INVENTION[0004]The present invention relates generally to apparatus and methods of releasing mechanical plugs into a well bore. More particularly, the present invention relates to compressible mechanical plugs that may be released into a work string disposed within a well bore to actuate downhole tools, and methods of releasing the mechanical plugs remotely from the work string.BACKGROUND[0005]In general, when drilling hydrocarbon wells, a drill bit is disposed at the end of a drill string, and typicall...
Claims
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IPC IPC(8): E21B33/13
CPCE21B17/05E21B33/16E21B33/05E21B21/106E21B33/165
Inventor TJORSWAAG, THOROLAUSSEN, STEINROGERS, HENRY E.BRAUN, NICHALOS C.FEARS, BRETT
Owner HALLIBURTON ENERGY SERVICES INC