Heat exchange – Geographical
Reexamination Certificate
2000-07-21
2002-01-15
Lazarus, Ira S. (Department: 3743)
Heat exchange
Geographical
C166S061000, C166S302000, C166S303000
Reexamination Certificate
active
06338381
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention, in at least certain embodiments, is directed to heat exchange systems for exchanging heat between an earth conduit and/or earth loop and a rig, wellhead, pipe, pipeline or riser; the systems, in certain aspects, having an earth conduit or loop and associated apparatus for transferring heat between transfer fluid circulating in the conduit or loop and the rig, wellhead, pipe, pipeline or riser.
2. Description of Related Art
The prior art discloses a wide variety of earth heat exchange systems. Typically such systems include conduit, conduits, and/or a pipe loop within the earth, apparatus for circulating heat transfer fluid therethrough and through other systems or apparatuses above the surface, and heat exchange apparatus for exchanging heat between the transfer fluid and an item, apparatus, device or other thing.
SUMMARY OF THE PRESENT INVENTION
The present invention, at least in certain preferred aspects, discloses a system for heating or cooling a rig, apparatus thereon, a pipeline (above ground, under ground, and/or under water), wellhead, pipe, wellbore or a riser, the system including an earth heat exchange conduit or loop within the earth and heat exchange apparatus for conveying heated (or cooled) transfer fluid circulating through the earth heat exchange conduit or loop to the rig, pipe, wellbore, riser, or pipeline. The heat exchange apparatus may encompass a portion of an item's exterior and/or it may include heat exchange device(s) within the item or pipeline to heat or cool fluid flowing therein.
In certain embodiments according to the present invention the heat exchange apparatus is permanently or semi-permanently installed on a pipe, rig, riser, wellhead or pipeline section. In other embodiments a movable jacket or module is used that is selectively interconnectible to one of a series of earth heat exchange conduits or loops so that a selected portion of the item or section can be heated or cooled. In another aspect a mobile heat exchange apparatus is used within a pipe, riser, or a pipeline that can be connected so that it is in fluid communication with an earth heat exchange system nearby. In certain embodiments one or more flow rate control devices are used within a conduit or loop to control and/or maintain fluid flow rate through a portion thereof.
In one aspect an earth conduit or loop is provided that has a portion thereof that is insulated. In another aspect one or more valves and/or one or more flow rate control devices are used in an earth conduit or loop to control fluid flow rate therein and/or to selectively flow heat transfer fluid through a selected portion of a loop or conduit.
What follows are some of, but not all, the objects of this invention. In addition to the specific objects stated below for at least certain preferred embodiments of the invention, other objects and purposes will be readily apparent to one of skill in this art who has the benefit of this invention's teachings and disclosures. It is, therefore, an object of at least certain preferred embodiments of the present invention to provide:
New, useful, unique, efficient, nonobvious devices and methods for transferring heat between a rig, wellhead, or pipeline and heat transfer fluid circulating through an earth conduit or loop;
Such devices and methods wherein a heat exchange device is selectively emplaceable at a desired location and removably interconnectible with one, two, three, or more or a series of a plurality of earth conduits and/or loops;
Such devices and methods with remotely controlled controllers, pumps, etc;
Such devices and methods with pumps, etc. powered with a solar power system and/or a wind power system;
Such devices and methods for a portion of a pipeline above ground and/or below ground;
Such devices and methods with a heat exchange device on the outside of or within a pipeline;
Such devices and methods with a heat exchange device movable within a pipeline;
Such devices and methods with a heat exchange device within a wellbore, the device in fluid communication with an earth conduit or loop;
Such devices and methods with an earth conduit or earth loop having an insulated portion to enhance heat transfer efficiency; and
Such devices and methods with one or more pumps, valves, and/or flow control devices in an earth conduit or loop, or in part thereof, or in an earth loop with one or more crossover portions.
Certain embodiments of this invention are not limited to any particular individual feature disclosed here, but include combinations of them distinguished from the prior art in their structures and functions. Features of the invention have been broadly described so that the detailed descriptions that follow may be better understood, and in order that the contributions of this invention to the arts may be better appreciated. There are, of course, additional aspects of the invention described below and which may be included in the subject matter of the claims to this invention. Those skilled in the art who have the benefit of this invention, its teachings, and suggestions will appreciate that the conceptions of this disclosure may be used as a creative basis for designing other structures, methods and systems for carrying out and practicing the present invention. The claims of this invention are to be read to include any legally equivalent devices or methods which do not depart from the spirit and scope of the present invention.
The present invention recognizes and addresses the previously-mentioned problems and long-felt needs and provides a solution to those problems and a satisfactory meeting of those needs in its various possible embodiments and equivalents thereof. To one skilled in this art who has the benefits of this invention's realizations, teachings, disclosures, and suggestions, other purposes and advantages will be appreciated from the following description of preferred embodiments, given for the purpose of disclosure, when taken in conjunction with the accompanying drawings. The detail in these descriptions is not intended to thwart this patent's object to claim this invention no matter how others may later disguise it by variations in form or additions of further improvements.
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Duong Tho Van
Lazarus Ira S.
McClung Guy
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