US20080202042A1 - Drawworks and motor - Google Patents
Drawworks and motor Download PDFInfo
- Publication number
- US20080202042A1 US20080202042A1 US11/709,940 US70994007A US2008202042A1 US 20080202042 A1 US20080202042 A1 US 20080202042A1 US 70994007 A US70994007 A US 70994007A US 2008202042 A1 US2008202042 A1 US 2008202042A1
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- United States
- Prior art keywords
- motor
- power cables
- channels
- shaft
- power
- Prior art date
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- Abandoned
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/008—Winding units, specially adapted for drilling operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/12—Driving gear incorporating electric motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/14—Power transmissions between power sources and drums or barrels
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys
- H02K7/1012—Machine arranged inside the pulley
- H02K7/1016—Machine of the outer rotor type
Definitions
- the present invention is directed to: drawworks, particularly to drawworks used with well drilling rigs in the performance of various operations on the rig; motors for such drawworks; power cables for such motors; and methods of using these things.
- a drawworks is used in connection the raising and lowering of a variety of loads.
- a drawworks is used on a rig or with a derrick to hold and to raise and lower tubulars, e.g., but not limited to, a drill string and associated equipment above, into and/or out of a wellbore.
- a traveling block, having an appropriate hook or other similar assembly typically used for the raising and lowering operations is secured in block-and-tackle fashion to a crown block or other limit fixture located at the top of the rig or derrick.
- Operation of the traveling block is performed by means of a hoist cable or line, one end of which is secured to the rig floor or ground forming a “dead line”, with the other end secured to the drawworks proper and forming a “fast line”.
- load bearing assemblies are possible.
- load bearing assemblies are referred to as the “traveling block”, which can include a hook or other attachment, associated equipment, and/or other load associated therewith as it moves up and down.
- prior drawworks include a rotatable cylindrical drum upon which cable or fast line is wound by means of a prime mover (motor) and power assembly.
- the drawworks and traveling block assembly are automatically controlled or operated by an operator, e.g. a “driller”.
- the prime mover (motor) is controlled by the operator e.g. with a foot or hand throttle; or the drawworks is automatically controlled by a suitable control system.
- the drawworks is supplied with one or more suitable brakes—for routine operation and for emergencies.
- the lines or wirelines are usually wire ropes or steel cables, although other materials have also been used.
- Drawworks' motors are relatively heavy high-horsepower motors. They provide the power to raise and lower loads that can be many hundred ton loads, some exceeding a thousand tons. Power cables that provide power to these motors can heat up due to the high flow of current through the cables. In the past these cables have been insulated and cooled with air flow or cooled by the media in which a cable is located, e.g. the earth. With certain known cooling methods there is insufficient heat exchange and, regarding certain cooling media, the media must be compatible with cable insulation or with the cable wires.
- the present invention provides a drawworks system with a motor having cooled power cables.
- the power cables are cooled by heat exchange with cooling flowing adjacent the power cables.
- the power cables are encased in insulating material to further maintain them at a desired operating temperature.
- the heat exchange fluid can be any suitable fluid, e.g., but not limited to water, freon, liquid nitrogen, or antifreeze.
- the present invention discloses, in certain aspects, systems for use in wellbore operations, the systems including: a rig; a derrick on the rig; a drawworks; a motor for powering the drawworks, the motor having a motor shaft, a plurality of power cables for providing electrical power to the motor, a portion of each of the plurality of power cables passing through the shaft; and a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables.
- the present invention discloses, in certain aspects, motors having: a motor shaft; a plurality of power cables for providing electrical power to the motor; a portion of each of the plurality of power cables passing through the shaft; and a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables.
- the present invention discloses, in certain aspects, methods for moving an item in a rig system, the rig system for use in wellbore operations, the rig system as any described herein; the method including: raising or lowering the item by running a rig motor; and cooling motor power cables by passing heat exchange fluid through a plurality of channels adjacent the cables.
- the present invention discloses, in certain aspects, motors including: a motor shaft; at least one power cable for providing electrical power to the motor; a portion of the at least one power cable passing through the shaft; and at least one channel passing through the shaft adjacent the at least one power cable and spaced-apart therefrom, the at least one channel for the passage therethrough of a heat exchange fluid for the exchange of heat with the at least one power cable to cool the at least one power cable.
- the present invention includes features and advantages which are believed to enable it to advance drawworks and drawworks motor technology. Characteristics and advantages of the present invention described above and additional features and benefits will be readily apparent to those skilled in the art upon consideration of the following detailed description of preferred embodiments and referring to the accompanying drawings.
- FIG. 1 is a schematic view of a system according to the present invention.
- FIG. 1A is a schematic view of a motor of the system of FIG. 1 .
- FIG. 2A is a side cross-section view of a drawworks according to the present invention.
- FIG. 2B is an enlarged perspective view of a motor of the drawworks of FIG. 2A .
- FIG. 2C is an end view of part of the motor of FIG. 2A .
- FIG. 3A is a perspective view of a shaft of the motor of FIG. 2A .
- FIG. 3B is a perspective view of part of the shaft of FIG. 3A .
- FIG. 3C is an end view of part of the shaft of FIG. 3A .
- FIG. 4A is a perspective view of a shaft according to the present invention for a motor according to the present invention.
- FIG. 4B is an end view of the shaft of FIG. 4A .
- drilling system 10 is used in conjunction with a drilling rig R according to the present invention.
- the drilling rig R has a derrick 10 with a crown block 15 .
- a traveling block 20 Suspended by a rope arrangement 17 from the crown block 15 is a traveling block 20 , or load bearing part, for supporting a hook structure 25 .
- the traveling block 20 can be formed as a hook block or other conventional related load bearing parts of a hoist assembly attached to the rope arrangement 17 .
- the term “hook block” refers to the load bearing part 20 of the hoist assembly.
- a hoisting line 30 is securely fixed at one end to ground by a dead line 35 and a dead line anchor 40 .
- the other end of the hoisting line 30 forms a fast line 45 attached to a drawworks 50 according to the present invention.
- the drawworks 50 includes one, two (or more) or more electrical motors 55 according to the present invention for rotating a cylindrical rotatable drum 65 for wrapping and unwrapping the fast line 45 as required for operation of the associated crown block 15 and traveling block 20 .
- the rotatable drum 65 is also referred to as a winding drum or a hoisting drum.
- a brake arrangement 70 connected to the drawworks 50 typically includes a band type primary brake or disk brake, an auxiliary brake, such as an eddy current type brake or a magnetic brake, and an emergency brake.
- Various sensors 90 and 92 provide information to a drawworks control system 80 .
- Electrical power from a power source 60 e.g. a typical rig power apparatus
- a junction box 64 e.g. a typical rig power apparatus
- Coolant channels 66 adjacent the cables 62 provide for indirect heat exchange cooling of the cables 62 .
- Channels 68 in fluid communication with the channels 66 , provide for the exit of fluid pumped through the channels 66 by a pump 72 from a fluid reservoir 74 .
- FIGS. 2A-2C show a drawworks 100 according to the present invention which includes a rotatable drum 110 rotatably secured to mounts 102 , 104 on a base 106 .
- a rotor 132 of a motor 130 encompasses a stator 134 .
- the stator 134 has a body 131 with a plurality of windings 136 on a body 135 and the rotor 132 has a plurality of permanent magnets 138 .
- a shaft 140 projects from the body 131 through the drum 110 and through one of the mounts 102 .
- the motor is interconnected with a gear system 105 .
- Power cables 150 extend from outside the drum 110 (e.g. from a junction box), through a channel or central bore 142 in the shaft 140 , and to connections with the stator windings 136 , exiting through a hole 144 in the shaft 140 for connection to the windings 136 .
- the present invention includes within its scope a motor with at least one power cable.
- the shaft 140 has one or a plurality of fluid channels 146 (multiple channels shown) through which heat exchange fluid is pumped. In communication with these shaft channels 146 are a plurality of corresponding channels 139 in the body 131 of the stator 134 . The fluid pumped through the channels 146 is conveyed, via the channels 139 away from the stator 134 .
- certain of the channels 146 are input channels and certain of the channels 146 are output channels, with a pump pumping the heat exchange fluid into the input channels and out the output channels (at the same end of the shaft; the right end as viewed in FIG. 2A ).
- the power cables may run through any part of the shaft (other than the central bore); and the water channels, shown surrounding the power cables, may optionally, be centrally located or located as desired.
- An inner housing 160 with ends 162 , 164 contains the stator 134 . These ends 162 , 164 move on bearings 166 , 168 respectively.
- the shaft 140 is on the bearings 114 in a drum end 116 and on bearings 172 in the mount 102 .
- Each cable 150 includes a plurality of wires 154 (e.g. copper or aluminum) running therethrough potted in a potting material 154 .
- wires 154 e.g. copper or aluminum
- these wires are in groups of three.
- FIGS. 4A and 4B illustrate an end 181 of a shaft 180 (like the shaft 140 ) which is part of or connected to a body (not shown; like the body 131 ).
- the shaft 180 has a plurality of fluid channels 186 therethrough (like the channels 146 ) and a central channel 182 (like the channel 142 ).
- a plurality of cables 190 (like the cables 150 ) run through the shaft 180 .
- a heat exchange fluid 188 (e.g. water, antifreeze, oil, or mineral oil) is pumped through the channels 186 .
- the cables 190 include a plurality of conducting wires 192 (like the wires 154 ) are insulated with an insulating jacket 196 , e.g. of silicon or high temperature silicones.
- the wires 192 are in group of three bundled together and twisted along their length to minimize inductance heating of metal and objects adjacent the cables.
- each wire has individual insulation.
- each grouping of three wires constitutes a power cable.
- the cables are all potted in a matrix 198 of potting material (e.g., but not limited to, e.g. insulating material with a high dielectric constant such as cable jacketing material made from, e.g. insulating resin compounds, thermosetting epoxy material).
- a junction box used with such cables, e.g. the junction box 64 , FIG. 1A is, optionally sealed to prevent water leakage.
- the overall size of the power cables is reduced as compared to certain prior art power cables, e.g. from 1 ⁇ 3 to 2 ⁇ 3 size reduction, and, in certain cases, a 50% reduction in size.
- less of the conductor metal copper or aluminum
- a system according to the present invention with water cooling will be about fifty percent smaller in size than a comparable prior art system with air cooling.
- the rotor and stator are housed within a drum or housing. It is within the scope of the present invention to provide a motor according to the present invention which is outside such a drum or housing. It is within the scope of the present invention to provide cooling of power cables according to the present invention, cooled power cables according to the present invention, and a motor with such cables according to the present invention, in one aspect with the motor outside a drum or housing for a drawworks or other apparatus.
- the present invention therefore, provides, in at least certain but not necessarily all embodiments, a system for use in wellbore operations, the system including: a rig; a derrick on the rig; a drawworks; a motor for powering the drawworks, the motor including a motor shaft, a plurality of power cables for providing electrical power to the motor, a portion of each of the plurality of power cables passing through the shaft and a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables.
- Such an apparatus may have one or some, in any possible combination, of the following: a drum on the drawworks for taking in and playing out a line, and the motor disposed within and connected to the drum; the power cables including at least one wire through which electric current flows, the wires insulated with insulating material; each power cable comprises a plurality of conducting wires, each conducting wire is insulated, and all the power cables are potted in a matrix of potting material; the power cables extend within the motor shaft along a first length, the channels for the passage therethrough of a heat exchange fluid extend within the motor shaft along a second length, and the second length at least as long as the first length; the motor shaft having a center bore, the power cables extend through the center bore of the motor shaft, and the channels are around the center bore; and/or the motor shaft having a first portion, a second portion, and a stator between the first portion and the second portion, the channels extending from the first portion, through the stator, and to the second portion, and the heat exchange fluid entering the channels at the first portion
- the present invention therefore, provides, in at least certain but not necessarily all embodiments, a system for use in wellbore operations, the system including: a rig; a derrick on the rig; a drawworks; a motor for powering the drawworks, the motor including a motor shaft, a plurality of power cables for providing electrical power to the motor, a portion of each of the plurality of power cables passing through the shaft, a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables, a drum on the drawworks for taking in and playing out a line, the motor disposed within and connected to the drum, and wherein motor shaft has a center bore, the power cables extend through the center bore of the motor shaft, and the channels are around the center bore.
- the present invention therefore, provides, in at least certain but not necessarily all embodiments, a system for use in wellbore operations, the system including: a rig; a derrick on the rig; a drawworks; a motor for powering the drawworks, the motor including a motor shaft, a plurality of power cables for providing electrical power to the motor, a portion of each of the plurality of power cables passing through the shaft, a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables, a drum on the drawworks for taking in and playing out a line, the motor disposed within and connected to the drum, and wherein motor shaft has a center bore, the power cables extend through the center bore of the motor shaft, and the channels are around the center bore.
- the present invention therefore, provides, in at least certain but not necessarily all embodiments, a motor including: a motor shaft; a plurality of power cables for providing electrical power to the motor; a portion of each of the plurality of power cables passing through the shaft; and a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables.
- Such an apparatus may have one or some, in any possible combination, of the following: a drum for taking in and playing out a line, and the motor disposed within and connected to the drum; the power cables including at least one wire through which electric current flows, the wires insulated with insulating material; each power cable is a plurality of conducting wires, each conducting wire is insulated, and all the power cables are potted in a matrix of potting material; the power cables extending within the motor shaft along a first length, the channels for the passage therethrough of a heat exchange fluid extend within the motor shaft along a second length, and the second length at least as long as the first length; the motor shaft having a center bore, the power cables extending through the center bore of the motor shaft, and the channels are around the center bore; and/or the motor shaft having a first portion, a second portion, and a stator between the first portion and the second portion, the channels extending from the first portion, through the stator, and to the second portion, and the heat exchange fluid entering the channels at the first portion and exit
- the present invention therefore, provides, in at least certain but not necessarily all embodiments, a method for moving an item in a rig system, the rig system for use in wellbore operations, the rig system being any rig disclosed herein, the method including: raising or lowering the item by running a rig motor, and cooling a power cable or power cables of the rig motor by passing heat exchange fluid through a plurality of channels adjacent the cable or cables.
- Such an apparatus may have one or some, in any possible combination, of the following: the power cable or cables extend within a motor shaft along a first length, the channels for the passage therethrough of a heat exchange fluid extend within the motor shaft along a second length, and the second length at least as long as the first length; and/or the motor shaft has a center bore, the power cables extend through the center bore of the motor shaft, and the channels are around the center bore.
- the present invention therefore, provides, in at least certain but not necessarily all embodiments, a motor including: a motor shaft; at least one power cable for providing electrical power to the motor; a portion of the at least one power cable passing through the shaft; and at least one channel passing through the shaft adjacent the at least one power cable and spaced-apart therefrom, the at least one channel for the passage therethrough of a heat exchange fluid for the exchange of heat with the at least one power cable to cool the at least one power cable.
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- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
Description
- 1. Field of the Invention
- The present invention is directed to: drawworks, particularly to drawworks used with well drilling rigs in the performance of various operations on the rig; motors for such drawworks; power cables for such motors; and methods of using these things.
- 2. Description of Related Art
- A drawworks is used in connection the raising and lowering of a variety of loads. In wellbore operations, such as drilling a well for oil or gas, a drawworks is used on a rig or with a derrick to hold and to raise and lower tubulars, e.g., but not limited to, a drill string and associated equipment above, into and/or out of a wellbore. A traveling block, having an appropriate hook or other similar assembly typically used for the raising and lowering operations is secured in block-and-tackle fashion to a crown block or other limit fixture located at the top of the rig or derrick. Operation of the traveling block is performed by means of a hoist cable or line, one end of which is secured to the rig floor or ground forming a “dead line”, with the other end secured to the drawworks proper and forming a “fast line”. Other load bearing assemblies are possible. Herein such load bearing assemblies are referred to as the “traveling block”, which can include a hook or other attachment, associated equipment, and/or other load associated therewith as it moves up and down.
- In certain aspects, prior drawworks include a rotatable cylindrical drum upon which cable or fast line is wound by means of a prime mover (motor) and power assembly. The drawworks and traveling block assembly are automatically controlled or operated by an operator, e.g. a “driller”. In association with the raising of the traveling block, the prime mover (motor) is controlled by the operator e.g. with a foot or hand throttle; or the drawworks is automatically controlled by a suitable control system. The drawworks is supplied with one or more suitable brakes—for routine operation and for emergencies. The lines or wirelines are usually wire ropes or steel cables, although other materials have also been used.
- Drawworks' motors are relatively heavy high-horsepower motors. They provide the power to raise and lower loads that can be many hundred ton loads, some exceeding a thousand tons. Power cables that provide power to these motors can heat up due to the high flow of current through the cables. In the past these cables have been insulated and cooled with air flow or cooled by the media in which a cable is located, e.g. the earth. With certain known cooling methods there is insufficient heat exchange and, regarding certain cooling media, the media must be compatible with cable insulation or with the cable wires.
- There is a need, recognized by the present inventors, for effective and efficient drawworks systems and motors for them. There is a need, recognized by the present inventors, for effective and efficient drawworks motor.
- There is a need, recognized by the present inventors, for an effective and efficient drawworks motor with power cables maintained at an efficient operating temperature.
- The present invention, in certain embodiments, provides a drawworks system with a motor having cooled power cables. In one aspect the power cables are cooled by heat exchange with cooling flowing adjacent the power cables. In one aspect, the power cables are encased in insulating material to further maintain them at a desired operating temperature. The heat exchange fluid can be any suitable fluid, e.g., but not limited to water, freon, liquid nitrogen, or antifreeze.
- The present invention discloses, in certain aspects, systems for use in wellbore operations, the systems including: a rig; a derrick on the rig; a drawworks; a motor for powering the drawworks, the motor having a motor shaft, a plurality of power cables for providing electrical power to the motor, a portion of each of the plurality of power cables passing through the shaft; and a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables.
- The present invention discloses, in certain aspects, motors having: a motor shaft; a plurality of power cables for providing electrical power to the motor; a portion of each of the plurality of power cables passing through the shaft; and a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables.
- The present invention discloses, in certain aspects, methods for moving an item in a rig system, the rig system for use in wellbore operations, the rig system as any described herein; the method including: raising or lowering the item by running a rig motor; and cooling motor power cables by passing heat exchange fluid through a plurality of channels adjacent the cables.
- The present invention discloses, in certain aspects, motors including: a motor shaft; at least one power cable for providing electrical power to the motor; a portion of the at least one power cable passing through the shaft; and at least one channel passing through the shaft adjacent the at least one power cable and spaced-apart therefrom, the at least one channel for the passage therethrough of a heat exchange fluid for the exchange of heat with the at least one power cable to cool the at least one power cable.
- Accordingly, the present invention includes features and advantages which are believed to enable it to advance drawworks and drawworks motor technology. Characteristics and advantages of the present invention described above and additional features and benefits will be readily apparent to those skilled in the art upon consideration of the following detailed description of preferred embodiments and referring to the accompanying drawings.
- 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, there are other objects and purposes which 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 systems and methods for drawworks, drawworks motors, power cables for such motors, and cooling of such cables.
- 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, functions, and/or results achieved. 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 problems and needs in this area and provides a solution to those problems and a satisfactory meeting of those needs in its various possible embodiments and equivalents thereof. To one of skill 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 certain 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 attempt to disguise it by variations in form, changes, or additions of further improvements.
- The Abstract that is part hereof is to enable the U.S. Patent and Trademark Office and the public generally, and scientists, engineers, researchers, and practitioners in the art who are not familiar with patent terms or legal terms of phraseology to determine quickly from a cursory inspection or review the nature and general area of the disclosure of this invention. The Abstract is neither intended to define the invention, which is done by the claims, nor is it intended to be limiting of the scope of the invention or of the claims in any way.
- It will be understood that the various embodiments of the present invention may include one, some, or all of the disclosed, described, and/or enumerated improvements and/or technical advantages and/or elements in claims to this invention.
- A more particular description of embodiments of the invention briefly summarized above may be had by references to the embodiments which are shown in the drawings which form a part of this specification. These drawings illustrate certain preferred embodiments and are not to be used to improperly limit the scope of the invention which may have other equally effective or equivalent embodiments.
-
FIG. 1 is a schematic view of a system according to the present invention. -
FIG. 1A is a schematic view of a motor of the system ofFIG. 1 . -
FIG. 2A is a side cross-section view of a drawworks according to the present invention. -
FIG. 2B is an enlarged perspective view of a motor of the drawworks ofFIG. 2A . -
FIG. 2C is an end view of part of the motor ofFIG. 2A . -
FIG. 3A is a perspective view of a shaft of the motor ofFIG. 2A . -
FIG. 3B is a perspective view of part of the shaft ofFIG. 3A . -
FIG. 3C is an end view of part of the shaft ofFIG. 3A . -
FIG. 4A is a perspective view of a shaft according to the present invention for a motor according to the present invention. -
FIG. 4B is an end view of the shaft ofFIG. 4A . - Presently preferred embodiments of the invention are shown in the above-identified figures and described in detail below. It should be understood that the appended drawings and description herein are of preferred embodiments and are not intended to limit the invention or the appended claims. On the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims. In showing and describing the preferred embodiments, like or identical reference numerals are used to identify common or similar elements. The figures are not necessarily to scale and certain features and certain views of the figures may be shown exaggerated in scale or in schematic in the interest of clarity and conciseness.
- As used herein and throughout all the various portions (and headings) of this patent, the terms “invention”, “present invention” and variations thereof mean one or more embodiment, and are not intended to mean the claimed invention of any particular appended claim(s) or all of the appended claims. Accordingly, the subject or topic of each such reference is not automatically or necessarily part of, or required by, any particular claim(s) merely because of such reference.
- Referring to
FIG. 1 andFIG. 1A ,drilling system 10 according to the present invention is used in conjunction with a drilling rig R according to the present invention. The drilling rig R has aderrick 10 with acrown block 15. Suspended by arope arrangement 17 from thecrown block 15 is a travelingblock 20, or load bearing part, for supporting ahook structure 25. Alternatively, the travelingblock 20 can be formed as a hook block or other conventional related load bearing parts of a hoist assembly attached to therope arrangement 17. As used herein, the term “hook block” refers to theload bearing part 20 of the hoist assembly. - A hoisting
line 30 is securely fixed at one end to ground by adead line 35 and adead line anchor 40. The other end of thehoisting line 30 forms afast line 45 attached to adrawworks 50 according to the present invention. Thedrawworks 50 includes one, two (or more) or moreelectrical motors 55 according to the present invention for rotating a cylindricalrotatable drum 65 for wrapping and unwrapping thefast line 45 as required for operation of the associatedcrown block 15 and travelingblock 20. Therotatable drum 65 is also referred to as a winding drum or a hoisting drum. Abrake arrangement 70 connected to thedrawworks 50 typically includes a band type primary brake or disk brake, an auxiliary brake, such as an eddy current type brake or a magnetic brake, and an emergency brake.Various sensors drawworks control system 80. Electrical power from a power source 60 (e.g. a typical rig power apparatus) is provided tocables 62 according to the present invention via ajunction box 64.Coolant channels 66 adjacent thecables 62 provide for indirect heat exchange cooling of thecables 62.Channels 68, in fluid communication with thechannels 66, provide for the exit of fluid pumped through thechannels 66 by apump 72 from afluid reservoir 74. -
FIGS. 2A-2C show adrawworks 100 according to the present invention which includes arotatable drum 110 rotatably secured tomounts base 106. Arotor 132 of amotor 130 encompasses astator 134. Thestator 134 has abody 131 with a plurality ofwindings 136 on abody 135 and therotor 132 has a plurality ofpermanent magnets 138. Ashaft 140 projects from thebody 131 through thedrum 110 and through one of themounts 102. The motor is interconnected with agear system 105. - Power cables 150 (or a cable) extend from outside the drum 110 (e.g. from a junction box), through a channel or
central bore 142 in theshaft 140, and to connections with thestator windings 136, exiting through ahole 144 in theshaft 140 for connection to thewindings 136. The present invention includes within its scope a motor with at least one power cable. Theshaft 140 has one or a plurality of fluid channels 146 (multiple channels shown) through which heat exchange fluid is pumped. In communication with theseshaft channels 146 are a plurality ofcorresponding channels 139 in thebody 131 of thestator 134. The fluid pumped through thechannels 146 is conveyed, via thechannels 139 away from thestator 134. Alternatively, certain of thechannels 146 are input channels and certain of thechannels 146 are output channels, with a pump pumping the heat exchange fluid into the input channels and out the output channels (at the same end of the shaft; the right end as viewed inFIG. 2A ). optionally, the power cables may run through any part of the shaft (other than the central bore); and the water channels, shown surrounding the power cables, may optionally, be centrally located or located as desired. - An
inner housing 160 withends stator 134. These ends 162, 164 move onbearings shaft 140 is on thebearings 114 in adrum end 116 and onbearings 172 in themount 102. - Each
cable 150 includes a plurality of wires 154 (e.g. copper or aluminum) running therethrough potted in apotting material 154. For three phase power transmission, these wires are in groups of three. -
FIGS. 4A and 4B illustrate anend 181 of a shaft 180 (like the shaft 140) which is part of or connected to a body (not shown; like the body 131). Theshaft 180 has a plurality offluid channels 186 therethrough (like the channels 146) and a central channel 182 (like the channel 142). A plurality of cables 190 (like the cables 150) run through theshaft 180. - A heat exchange fluid 188 (e.g. water, antifreeze, oil, or mineral oil) is pumped through the
channels 186. Thecables 190 include a plurality of conducting wires 192 (like the wires 154) are insulated with an insulatingjacket 196, e.g. of silicon or high temperature silicones. In one aspect thewires 192 are in group of three bundled together and twisted along their length to minimize inductance heating of metal and objects adjacent the cables. In one aspect each wire has individual insulation. In one aspect each grouping of three wires constitutes a power cable. - The cables are all potted in a
matrix 198 of potting material (e.g., but not limited to, e.g. insulating material with a high dielectric constant such as cable jacketing material made from, e.g. insulating resin compounds, thermosetting epoxy material). A junction box used with such cables, e.g. thejunction box 64,FIG. 1A is, optionally sealed to prevent water leakage. - By using the channels adjacent the power cables to flow heat exchange fluid for cooling the power cables, the overall size of the power cables is reduced as compared to certain prior art power cables, e.g. from ⅓ to ⅔ size reduction, and, in certain cases, a 50% reduction in size. In certain aspects less of the conductor metal (copper or aluminum) is needed to transmit a desired amount of power. For example, in certain aspects with four cables, each conducting 800 amps (total 3600 amps) with basic parameters (geometry, size, material conductivity of cable insulation, number of cables) being equal, a system according to the present invention with water cooling will be about fifty percent smaller in size than a comparable prior art system with air cooling.
- As shown e.g. in
FIG. 2A the rotor and stator are housed within a drum or housing. It is within the scope of the present invention to provide a motor according to the present invention which is outside such a drum or housing. It is within the scope of the present invention to provide cooling of power cables according to the present invention, cooled power cables according to the present invention, and a motor with such cables according to the present invention, in one aspect with the motor outside a drum or housing for a drawworks or other apparatus. - The present invention, therefore, provides, in at least certain but not necessarily all embodiments, a system for use in wellbore operations, the system including: a rig; a derrick on the rig; a drawworks; a motor for powering the drawworks, the motor including a motor shaft, a plurality of power cables for providing electrical power to the motor, a portion of each of the plurality of power cables passing through the shaft and a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables. Such an apparatus may have one or some, in any possible combination, of the following: a drum on the drawworks for taking in and playing out a line, and the motor disposed within and connected to the drum; the power cables including at least one wire through which electric current flows, the wires insulated with insulating material; each power cable comprises a plurality of conducting wires, each conducting wire is insulated, and all the power cables are potted in a matrix of potting material; the power cables extend within the motor shaft along a first length, the channels for the passage therethrough of a heat exchange fluid extend within the motor shaft along a second length, and the second length at least as long as the first length; the motor shaft having a center bore, the power cables extend through the center bore of the motor shaft, and the channels are around the center bore; and/or the motor shaft having a first portion, a second portion, and a stator between the first portion and the second portion, the channels extending from the first portion, through the stator, and to the second portion, and the heat exchange fluid entering the channels at the first portion and exiting from the second portion.
- The present invention, therefore, provides, in at least certain but not necessarily all embodiments, a system for use in wellbore operations, the system including: a rig; a derrick on the rig; a drawworks; a motor for powering the drawworks, the motor including a motor shaft, a plurality of power cables for providing electrical power to the motor, a portion of each of the plurality of power cables passing through the shaft, a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables, a drum on the drawworks for taking in and playing out a line, the motor disposed within and connected to the drum, and wherein motor shaft has a center bore, the power cables extend through the center bore of the motor shaft, and the channels are around the center bore.
- The present invention, therefore, provides, in at least certain but not necessarily all embodiments, a system for use in wellbore operations, the system including: a rig; a derrick on the rig; a drawworks; a motor for powering the drawworks, the motor including a motor shaft, a plurality of power cables for providing electrical power to the motor, a portion of each of the plurality of power cables passing through the shaft, a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables, a drum on the drawworks for taking in and playing out a line, the motor disposed within and connected to the drum, and wherein motor shaft has a center bore, the power cables extend through the center bore of the motor shaft, and the channels are around the center bore.
- The present invention, therefore, provides, in at least certain but not necessarily all embodiments, a motor including: a motor shaft; a plurality of power cables for providing electrical power to the motor; a portion of each of the plurality of power cables passing through the shaft; and a plurality of channels passing through the shaft adjacent the power cables and spaced-apart therefrom, the channels for the passage therethrough of a heat exchange fluid for the exchange of heat with the power cables to cool the power cables. Such an apparatus may have one or some, in any possible combination, of the following: a drum for taking in and playing out a line, and the motor disposed within and connected to the drum; the power cables including at least one wire through which electric current flows, the wires insulated with insulating material; each power cable is a plurality of conducting wires, each conducting wire is insulated, and all the power cables are potted in a matrix of potting material; the power cables extending within the motor shaft along a first length, the channels for the passage therethrough of a heat exchange fluid extend within the motor shaft along a second length, and the second length at least as long as the first length; the motor shaft having a center bore, the power cables extending through the center bore of the motor shaft, and the channels are around the center bore; and/or the motor shaft having a first portion, a second portion, and a stator between the first portion and the second portion, the channels extending from the first portion, through the stator, and to the second portion, and the heat exchange fluid entering the channels at the first portion and exiting from the second portion.
- The present invention, therefore, provides, in at least certain but not necessarily all embodiments, a method for moving an item in a rig system, the rig system for use in wellbore operations, the rig system being any rig disclosed herein, the method including: raising or lowering the item by running a rig motor, and cooling a power cable or power cables of the rig motor by passing heat exchange fluid through a plurality of channels adjacent the cable or cables. Such an apparatus may have one or some, in any possible combination, of the following: the power cable or cables extend within a motor shaft along a first length, the channels for the passage therethrough of a heat exchange fluid extend within the motor shaft along a second length, and the second length at least as long as the first length; and/or the motor shaft has a center bore, the power cables extend through the center bore of the motor shaft, and the channels are around the center bore.
- The present invention, therefore, provides, in at least certain but not necessarily all embodiments, a motor including: a motor shaft; at least one power cable for providing electrical power to the motor; a portion of the at least one power cable passing through the shaft; and at least one channel passing through the shaft adjacent the at least one power cable and spaced-apart therefrom, the at least one channel for the passage therethrough of a heat exchange fluid for the exchange of heat with the at least one power cable to cool the at least one power cable.
- In conclusion, therefore, it is seen that the present invention and the embodiments disclosed herein and those covered by the appended claims are well adapted to carry out the objectives and obtain the ends set forth. Certain changes can be made in the subject matter without departing from the spirit and the scope of this invention. It is realized that changes are possible within the scope of this invention and it is further intended that each element or step recited in any of the following claims is to be understood as referring to all equivalent elements or steps. The following claims are intended to cover the invention as broadly as legally possible in whatever form it may be utilized. The invention claimed herein is new and novel in accordance with 35 U.S.C. § 102 and satisfies the conditions for patentability in § 102. The invention claimed herein is not obvious in accordance with 35 U.S.C. § 103 and satisfies the conditions for patentability in § 103. This specification and the claims that follow are in accordance with all of the requirements of 35 U.S.C. § 112. The inventor may rely on the Doctrine of Equivalents to determine and assess the scope of their invention and of the claims that follow as they may pertain to apparatus not materially departing from, but outside of, the literal scope of the invention as set forth in the following claims. Any patent or patent application referred to herein buy patent number or application number is incorporated fully herein for all purposes.
Claims (20)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/709,940 US20080202042A1 (en) | 2007-02-22 | 2007-02-22 | Drawworks and motor |
PCT/GB2008/050016 WO2008102165A1 (en) | 2007-02-22 | 2008-01-08 | A drilling rig and drawworks therefor |
MX2009008832A MX2009008832A (en) | 2007-02-22 | 2008-01-08 | A drilling rig and drawworks therefor. |
CA002678096A CA2678096A1 (en) | 2007-02-22 | 2008-01-08 | A drilling rig and drawworks therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/709,940 US20080202042A1 (en) | 2007-02-22 | 2007-02-22 | Drawworks and motor |
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US20080202042A1 true US20080202042A1 (en) | 2008-08-28 |
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ID=39277000
Family Applications (1)
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US11/709,940 Abandoned US20080202042A1 (en) | 2007-02-22 | 2007-02-22 | Drawworks and motor |
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US (1) | US20080202042A1 (en) |
CA (1) | CA2678096A1 (en) |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US20140332204A1 (en) * | 2011-12-02 | 2014-11-13 | Schlumberger Technology Corporation | Quick Drum Connect |
US20150263575A1 (en) * | 2014-03-13 | 2015-09-17 | Canrig Drilling Technology Ltd. | Low Inertia Direct Drive Drawworks |
DE102016112036A1 (en) * | 2016-06-30 | 2018-01-04 | Interroll Holding Ag | Drive unit for a drum motor, drum motor, rear flange and manufacturing process |
US10351398B2 (en) * | 2014-06-06 | 2019-07-16 | Kito Corporation | Rope hoist |
US20220204320A1 (en) * | 2020-12-31 | 2022-06-30 | Paccar Inc | Electric motor assemblies and spindle assemblies for rotation |
US20220282594A1 (en) * | 2021-03-03 | 2022-09-08 | Cenovus Energy Inc. | System and process for installing a hydrocarbon production system |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102296933B (en) * | 2011-08-08 | 2014-07-30 | 仲帅 | Miniature folding automatic well drill |
CN105347217A (en) * | 2015-11-09 | 2016-02-24 | 南宁市正极机电有限公司 | Maintenance support device for maintenance of small power generation equipment |
NO20181034A1 (en) * | 2018-07-27 | 2020-01-28 | Flekkefjord Elektro As | Electric winch comprising a fully integrated cooling system |
Citations (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1733379A (en) * | 1928-05-04 | 1929-10-29 | Lowy Ludwig | Roller conveyer |
US1820985A (en) * | 1927-07-01 | 1931-09-01 | Central United Nat Bank | Temperature controlled motor driven roller |
US2894155A (en) * | 1955-03-21 | 1959-07-07 | Gen Electric | Liquid cooled dynamoelectric machine |
US3629634A (en) * | 1970-07-06 | 1971-12-21 | Gen Motors Corp | Conduit arrangement for a liquid-cooled dynamoelectric machine |
US3961127A (en) * | 1975-06-11 | 1976-06-01 | G & W Electric Specialty Company | Universal power cable joint for use with power cables having various insulations |
US4063122A (en) * | 1974-04-16 | 1977-12-13 | Siemens Aktiengesellschaft | Rotor containing a field winding cooled to a low temperature |
US4076988A (en) * | 1976-08-17 | 1978-02-28 | Westinghouse Electric Corporation | Superconducting dynamoelectric machine having a liquid metal shield |
US4171494A (en) * | 1976-08-11 | 1979-10-16 | Hitachi, Ltd. | Electric rotary machine having superconducting rotor |
US4187546A (en) * | 1977-03-15 | 1980-02-05 | B. J. Hughes Inc. | Computer-controlled oil drilling rig having drawworks motor and brake control arrangement |
US4295068A (en) * | 1979-05-18 | 1981-10-13 | General Electric Company | Cantilevered field winding support for a superconducting AC machine |
US4438904A (en) * | 1982-01-07 | 1984-03-27 | White Bobby E | Drawworks |
US4458228A (en) * | 1980-10-29 | 1984-07-03 | Pierburg Gmbh & Co. Kg. | Rotary positioning apparatus and associated methods, such as for a carburetor choke valve |
US4519585A (en) * | 1982-10-12 | 1985-05-28 | Cooper Industries | Drawworks brake control |
US4529669A (en) * | 1982-09-20 | 1985-07-16 | Hitachi, Ltd. | Welded structure for use at very low temperatures |
US4574210A (en) * | 1983-07-07 | 1986-03-04 | Wilhelm Gebhardt Gmbh | External rotor motor having a cooling system |
US4626619A (en) * | 1983-02-07 | 1986-12-02 | The Furukawa Electric Co., Ltd. | Water impervious rubber or plastic insulated power cable |
US4642495A (en) * | 1982-02-19 | 1987-02-10 | Hitachi, Ltd. | Electric rotary machine having superconducting rotor |
US4696377A (en) * | 1985-09-27 | 1987-09-29 | Ltv Energy Products Company | Brake system for drawworks |
US4782194A (en) * | 1985-11-25 | 1988-11-01 | Alcatel Usa Corp. | High voltage mass-impregnated power cable |
US5019733A (en) * | 1987-09-25 | 1991-05-28 | Honda Giken Kogyo Kabushiki Kaisha | AC generator |
US5145298A (en) * | 1989-09-11 | 1992-09-08 | Optima Industries, Inc. | High speed drill spindle |
US5147983A (en) * | 1990-12-24 | 1992-09-15 | Ashley James R | Six phase distribution powerline |
US5189325A (en) * | 1990-06-15 | 1993-02-23 | General Electric Company | Liquid cooling the rotor of an electrical machine |
US5280131A (en) * | 1992-07-06 | 1994-01-18 | Sarro Claude A | Fluid-filled electric power cable system with two-way piston check valve |
US5300733A (en) * | 1992-11-30 | 1994-04-05 | The Furukawa Electric Co., Ltd. | Water impervious rubber or plastic insulated power cable |
US6029951A (en) * | 1998-07-24 | 2000-02-29 | Varco International, Inc. | Control system for drawworks operations |
US6182945B1 (en) * | 1996-09-12 | 2001-02-06 | National Oilwell, L.P. | Redundant drawworks |
US6351045B1 (en) * | 1999-09-30 | 2002-02-26 | Reliance Electric Technologies, Llc | Croyogenic rotary transfer coupling for superconducting electromechanical machine |
US6657333B2 (en) * | 2001-09-17 | 2003-12-02 | Reliance Electric Technologies, Llc | Vacuum coupling of rotating superconducting rotor |
US20040134693A1 (en) * | 2002-10-23 | 2004-07-15 | Nissan Motor Co., Ltd. | Cooling system for electric motor of vehicle |
US20050006633A1 (en) * | 2003-06-30 | 2005-01-13 | Franks Charles Gllen | Drawworks apparatus |
US20050104470A1 (en) * | 2003-11-13 | 2005-05-19 | Perkins William P. | Integrated stator-axle for in-wheel motor of an electric vehicle |
US20050256701A1 (en) * | 2004-05-17 | 2005-11-17 | Nokia Corporation | Selection of coding models for encoding an audio signal |
US7084349B1 (en) * | 2005-02-03 | 2006-08-01 | E. I. Du Pont De Nemours And Company | Insulated power cable |
US20060249719A1 (en) * | 2005-04-29 | 2006-11-09 | Gerald Lesko | Electric drawworks for a drilling rig |
US7185881B2 (en) * | 2004-04-27 | 2007-03-06 | National-Oilwell, L.P. | Electric winch |
US7362016B2 (en) * | 2003-10-07 | 2008-04-22 | Aec-Motionstar, Inc. | Belt drive system with outer rotor motor |
US20080116432A1 (en) * | 2006-11-22 | 2008-05-22 | Victory Rig Equipment Corporation | Electric winch motor |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE563085C (en) * | 1932-11-01 | Aeg | Electric motor to drive a conveyor drum | |
US1614031A (en) * | 1921-10-08 | 1927-01-11 | Sullivan Machinery Co | Traction mechanism |
FR726294A (en) * | 1930-11-25 | 1932-05-26 | Himmelwerk Ag | Drum for lifting devices |
FR797302A (en) * | 1935-11-04 | 1936-04-24 | Location D App De Levage Const | Electric gear motor-winch unit |
FR1430184A (en) * | 1964-12-23 | 1966-03-04 | Forges Ateliers Const Electr | Self-propelled drum drive system |
US3850501A (en) * | 1973-04-09 | 1974-11-26 | Gen Electric | Feedthrough electrical terminal for hollow liquid cooled shaft of a dynamoelectric machine |
JPS6032537A (en) * | 1983-07-29 | 1985-02-19 | Mitsubishi Electric Corp | Liquid-sealed motor |
DE19733299A1 (en) * | 1997-08-01 | 1999-02-25 | Gustav Ad Koch Maschinenfabrik | Electric drive for winch |
WO2000066479A1 (en) * | 1999-05-02 | 2000-11-09 | Varco I/P, Inc. | System for measuring torque applied to the drum shaft of a hoist |
JP4025173B2 (en) * | 2002-10-30 | 2007-12-19 | トヨタ自動車株式会社 | Power cable cooling system |
-
2007
- 2007-02-22 US US11/709,940 patent/US20080202042A1/en not_active Abandoned
-
2008
- 2008-01-08 CA CA002678096A patent/CA2678096A1/en not_active Abandoned
- 2008-01-08 WO PCT/GB2008/050016 patent/WO2008102165A1/en active Application Filing
- 2008-01-08 MX MX2009008832A patent/MX2009008832A/en not_active Application Discontinuation
Patent Citations (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1820985A (en) * | 1927-07-01 | 1931-09-01 | Central United Nat Bank | Temperature controlled motor driven roller |
US1733379A (en) * | 1928-05-04 | 1929-10-29 | Lowy Ludwig | Roller conveyer |
US2894155A (en) * | 1955-03-21 | 1959-07-07 | Gen Electric | Liquid cooled dynamoelectric machine |
US3629634A (en) * | 1970-07-06 | 1971-12-21 | Gen Motors Corp | Conduit arrangement for a liquid-cooled dynamoelectric machine |
US4063122A (en) * | 1974-04-16 | 1977-12-13 | Siemens Aktiengesellschaft | Rotor containing a field winding cooled to a low temperature |
US3961127A (en) * | 1975-06-11 | 1976-06-01 | G & W Electric Specialty Company | Universal power cable joint for use with power cables having various insulations |
US4171494A (en) * | 1976-08-11 | 1979-10-16 | Hitachi, Ltd. | Electric rotary machine having superconducting rotor |
US4076988A (en) * | 1976-08-17 | 1978-02-28 | Westinghouse Electric Corporation | Superconducting dynamoelectric machine having a liquid metal shield |
US4187546A (en) * | 1977-03-15 | 1980-02-05 | B. J. Hughes Inc. | Computer-controlled oil drilling rig having drawworks motor and brake control arrangement |
US4295068A (en) * | 1979-05-18 | 1981-10-13 | General Electric Company | Cantilevered field winding support for a superconducting AC machine |
US4458228A (en) * | 1980-10-29 | 1984-07-03 | Pierburg Gmbh & Co. Kg. | Rotary positioning apparatus and associated methods, such as for a carburetor choke valve |
US4438904A (en) * | 1982-01-07 | 1984-03-27 | White Bobby E | Drawworks |
US4642495A (en) * | 1982-02-19 | 1987-02-10 | Hitachi, Ltd. | Electric rotary machine having superconducting rotor |
USRE33186E (en) * | 1982-02-19 | 1990-03-27 | Hitachi, Ltd. | Electric rotary machine having superconducting rotor |
US4529669A (en) * | 1982-09-20 | 1985-07-16 | Hitachi, Ltd. | Welded structure for use at very low temperatures |
US4519585A (en) * | 1982-10-12 | 1985-05-28 | Cooper Industries | Drawworks brake control |
US4626619A (en) * | 1983-02-07 | 1986-12-02 | The Furukawa Electric Co., Ltd. | Water impervious rubber or plastic insulated power cable |
US4574210A (en) * | 1983-07-07 | 1986-03-04 | Wilhelm Gebhardt Gmbh | External rotor motor having a cooling system |
US4696377A (en) * | 1985-09-27 | 1987-09-29 | Ltv Energy Products Company | Brake system for drawworks |
US4782194A (en) * | 1985-11-25 | 1988-11-01 | Alcatel Usa Corp. | High voltage mass-impregnated power cable |
US5019733A (en) * | 1987-09-25 | 1991-05-28 | Honda Giken Kogyo Kabushiki Kaisha | AC generator |
US5145298A (en) * | 1989-09-11 | 1992-09-08 | Optima Industries, Inc. | High speed drill spindle |
US5189325A (en) * | 1990-06-15 | 1993-02-23 | General Electric Company | Liquid cooling the rotor of an electrical machine |
US5147983A (en) * | 1990-12-24 | 1992-09-15 | Ashley James R | Six phase distribution powerline |
US5280131A (en) * | 1992-07-06 | 1994-01-18 | Sarro Claude A | Fluid-filled electric power cable system with two-way piston check valve |
US5300733A (en) * | 1992-11-30 | 1994-04-05 | The Furukawa Electric Co., Ltd. | Water impervious rubber or plastic insulated power cable |
US6182945B1 (en) * | 1996-09-12 | 2001-02-06 | National Oilwell, L.P. | Redundant drawworks |
US6029951A (en) * | 1998-07-24 | 2000-02-29 | Varco International, Inc. | Control system for drawworks operations |
US6351045B1 (en) * | 1999-09-30 | 2002-02-26 | Reliance Electric Technologies, Llc | Croyogenic rotary transfer coupling for superconducting electromechanical machine |
US6657333B2 (en) * | 2001-09-17 | 2003-12-02 | Reliance Electric Technologies, Llc | Vacuum coupling of rotating superconducting rotor |
US20040134693A1 (en) * | 2002-10-23 | 2004-07-15 | Nissan Motor Co., Ltd. | Cooling system for electric motor of vehicle |
US20050006633A1 (en) * | 2003-06-30 | 2005-01-13 | Franks Charles Gllen | Drawworks apparatus |
US7362016B2 (en) * | 2003-10-07 | 2008-04-22 | Aec-Motionstar, Inc. | Belt drive system with outer rotor motor |
US20050104470A1 (en) * | 2003-11-13 | 2005-05-19 | Perkins William P. | Integrated stator-axle for in-wheel motor of an electric vehicle |
US7185881B2 (en) * | 2004-04-27 | 2007-03-06 | National-Oilwell, L.P. | Electric winch |
US20050256701A1 (en) * | 2004-05-17 | 2005-11-17 | Nokia Corporation | Selection of coding models for encoding an audio signal |
US7084349B1 (en) * | 2005-02-03 | 2006-08-01 | E. I. Du Pont De Nemours And Company | Insulated power cable |
US20060249719A1 (en) * | 2005-04-29 | 2006-11-09 | Gerald Lesko | Electric drawworks for a drilling rig |
US20080116432A1 (en) * | 2006-11-22 | 2008-05-22 | Victory Rig Equipment Corporation | Electric winch motor |
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US20150263575A1 (en) * | 2014-03-13 | 2015-09-17 | Canrig Drilling Technology Ltd. | Low Inertia Direct Drive Drawworks |
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MX2009008832A (en) | 2009-08-31 |
WO2008102165A1 (en) | 2008-08-28 |
CA2678096A1 (en) | 2008-08-28 |
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