Drilling Rig System Having Improved Electrical Subsystem
In embodiments, a drilling rig system includes a rig unit having rig equipment and a rig electrical subsystem configured for electrical communication with the rig equipment and including a rig electrical subsystem input transformer, an electrical system including a primary power supply subsystem remote from the rig unit, and an intermediate electrical subsystem.
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This application is a continuation of U.S. patent application Ser. No. 15/481,227, filed Apr. 6, 2017, which is a continuation of U.S. patent application Ser. No. 14/593,776, filed Jan. 9, 2015, which is a continuation-in-part of U.S. patent application Ser. No. 14/554,882 filed on Nov. 26, 2014.
FIELD OF THE INVENTIONThe disclosure relates to improved drilling rig systems, such as for drilling wells at plural discrete locations at a drilling site. Those of ordinary skill will appreciate that need exists for drilling rig systems having an improved electrical subsystem.
BACKGROUND OF THE INVENTIONThe disclosure relates to improved drilling rig systems, such as for drilling wells at plural discrete locations at a drilling site. Those of ordinary skill will appreciate that need exists for drilling rig systems having an improved electrical subsystem.
BRIEF SUMMARY OF THE INVENTIONEmbodiments provide a drilling rig system that may have a stationary primary power subsystem and movable rig unit that can be relocated across a foundation pad between plural discreet drilling locations at a drilling site. A drilling rig system can include only a single intermediate conductor, or a single composite intermediate cable structure, extending between a stationary primary power subsystem and movable rig unit. Embodiments provide a drilling rig system that may have a stationary primary power subsystem and movable rig unit with a single power conductor member extending therebetween that is simplified and of reduced size and number, and of improved reliability, and may provide for more efficient operation with reduced time and labor, and with improved safety. In embodiments, a drilling rig system may have a stationary primary power subsystem and a movable rig unit that can be relocated across foundation pad between plural discreet drilling locations, and that can include only a single first releasable power connector assembly between a primary power supply subsystem and intermediate electrical subsystem, and only a second releasable power connector assembly between intermediate electrical subsystem and a rig electrical subsystem of the movable rig unit, and that are simplified and of reduced size and number, and of improved reliability, and provide for more efficient operation with reduced time and labor, and with improved safety. Embodiments provide the advantages of eliminating numerous 600 volt alternating current (“VAC”) intermediate cables that would otherwise extend from a primary power supply subsystem to a movable rig unit. Embodiments provide for simplified and more efficient use of the foundation pad by personnel and mobile equipment, such as tow motors, at a drilling site without requiring personnel to navigate over or around, or to physically move and reposition and connect or disconnect a plurality of 600 VAC intermediate cables. Embodiments provide the benefit of eliminating numerous drag links and festoons for handling numerous intermediate cables when relocating the rig unit. Embodiments provide the benefit of eliminating numerous electrical plugs and receptacles, and thus reducing high maintenance and resulting maintenance and repair downtime for same. Embodiments provide the benefit of enabling use of 600 VAC equipment at the primary power supply subsystem and rig unit. Embodiments provide the benefit of eliminating a large number of power cables and draglinks or festoons necessary to hand long multiple cables, and minimizing the number of power connector assemblies and components, such as releasable plug and receptacle power connector assemblies. Embodiments provide the benefit that power can be transferred to a movable rig unit at 4160 VAC over a single three-phase intermediate conductor or cable. Embodiments provide the benefit that a drawworks variable frequency drive (VFD), a top drive variable frequency drive and related control equipment can be included in a local equipment room (LER) that may be combined with the drillers control cabin on the movable rig unit. Embodiments provide the benefit that the control logic equipment for the drawworks, top drive and rig mounted equipment is located in the drillers control cabin and can communicate back via wire, fiber or wireless. Embodiments provide control wiring from rig mounted equipment that runs only a short distance from the rig equipment to the drilling control unit, such as from local equipment room (LER) of the driller's control cabin, and thus can eliminate or reduce communication problems associated with long control leads and numerous intermediate connections.
The novel features believed characteristic of the disclosed subject matter will be set forth in any claims that are filed later. The disclosed subject matter itself, however, as well as a preferred mode of use, further objectives, and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein:
Reference now should be made to the drawings, in which the same reference numbers are used throughout the different figures to designate the same components.
Drilling rig system 10 is located at a drilling site. Referring to
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It will be understood that rig unit 30 may include a driller's control unit (not shown) that can enable a controls and information interface (not shown) for personnel such as a driller. In some embodiments, for example, a driller's control unit may be housed in a driller's control cabin (not shown). A driller's control unit can include rig equipment controls (not shown) and data communications subsystem equipment and controls (not shown) configured to enable control and operation of drilling rig system 10 including, for example, rig equipment 50 and remote subsystems 200. It will be understood that control and operations functions of drilling rig system 10, rig unit 30, rig equipment 50 and remote subsystems 200 may be performed by automated systems, or by automated systems under control, or partial control, of personnel such as a driller. It will be understood that a driller's control cabin may be configured to house a driller for operating a control interface, and may include a driller's control chair having, for example, one or more joystick-type input devices.
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It will be understood that in embodiments as illustrated in
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An exemplary embodiment of a drilling rig system 710 is illustrated in
Embodiments provide a drilling rig system having a stationary primary power subsystem 400 and movable rig unit 30 that can be relocated across foundation pad 20 between plural discreet drilling locations 18a, 18b, 18c that can include only a single intermediate conductor 310, or a single composite intermediate cable structure 370 extending between stationary primary power subsystem 400 and movable rig unit 30. Embodiments provide a drilling rig system having a stationary primary power subsystem 400 and movable rig unit 30 with a single power conductor member therebetween that is simplified and of reduced size and number, and of improved reliability, and provide for more efficient operation with reduced time and labor, and with improved safety. Embodiments similarly provide a drilling rig system having a stationary primary power subsystem 400 and movable rig unit 30 that can be relocated across foundation pad 20 between plural discreet drilling locations 18a, 18b, 18c that can include only a single first releasable power connector assembly between primary power supply subsystem 400 and intermediate electrical subsystem 300, and only a second releasable power connector assembly between intermediate electrical subsystem 300 and rig electrical subsystem 70 of movable rig unit 30, that are simplified and of reduced size and number, and of improved reliability, and provide for more efficient operation with reduced time and labor, and with improved safety. Embodiments provide the advantages of eliminating numerous 600 VAC intermediate cables that would otherwise extend from primary power supply to a movable rig unit. Embodiments provide for simplified and more efficient use of the foundation pad by personnel and mobile equipment, such as tow motors, at a drilling site without requiring personnel to navigate over or around, or to physically move and reposition and connect or disconnect a plurality of such 600 VAC intermediate cables. Embodiments provide the benefit of eliminating numerous drag links and festoons for handling numerous intermediate cables when relocating the rig unit. Embodiments provide the benefit of eliminating numerous electrical plugs and receptacles, and thus reducing high maintenance and resulting maintenance and repair downtime for same. Embodiments provide the benefit of enabling use of 600 VAC equipment at the primary power supply subsystem and rig unit. Embodiments provide the benefit of eliminating a large number of power cables and draglinks or festoons necessary to hand long multiple cables, and minimizing the number of power connector assemblies and components, such as releasable plug and receptacle power connector assemblies. Embodiments provide the benefit that power can be transferred to the rig at 4160 VAC over a single three-phase intermediate conductor or cable. Embodiments provide the benefit that a drawworks variable frequency drive (VFD), a top drive variable frequency drive and related control equipment can be included in a local equipment room (LER) that may be combined with the drillers control cabin for movement with the rig unit. Embodiment provide the benefit that the control logic equipment for the drawworks, top Drive and rig mounted equipment is located in the drillers control cabin and can communicate back via wire, fiber or wireless. Embodiments provide control wiring from rig mounted equipment that runs only a short distance from the rig equipment to the drilling control unit, local equipment room (LER) of the driller's control cabin, and thus can eliminate or reduce communication problems associated with long control leads and numerous intermediate connections.
Claims
1. A drilling rig power system comprising:
- a movable rig electrical subsystem electrically coupled to a plurality of rig equipment, the movable rig electrical subsystem comprising a rig electrical subsystem input transformer for transforming intermediate power at a high voltage to rig power at a voltage that is less than the high voltage;
- a stationary primary power supply subsystem remote from the movable rig electrical subsystem; and
- an intermediate electrical subsystem comprising an intermediate subsystem input transformer electrically coupled to the stationary primary power supply subsystem for transforming primary power at another voltage that is less than the high voltage of the intermediate power to the high voltage of the intermediate power, and an intermediate conductor electrically coupled to the intermediate subsystem input transformer and the rig electrical subsystem input transformer.
2. The drilling rig power system of claim 1, wherein the another voltage of the primary power is at or below 690 Volts AC, and the high voltage of the intermediate power is at or above 2300 Volts AC.
3. The drilling rig power system of claim 1, wherein the voltage of the rig power is at or below 690 Volts AC.
4. The drilling rig power system of claim 1, wherein the intermediate conductor comprises no more than a set of conductor members for carrying three-phase electrical current.
5. The drilling rig power system of claim 1, wherein the intermediate electrical subsystem comprises another intermediate conductor electrically coupled to the intermediate subsystem input transformer and the rig electrical subsystem input transformer.
6. The drilling rig power system of claim 1, wherein the intermediate electrical subsystem comprises a conductor carrier reel configured to support the intermediate conductor for rotation about a conductor carrier reel axis during extension or retraction of the intermediate conductor.
7. A drilling rig power system comprising:
- a movable rig electrical subsystem electrically coupled to a plurality of rig equipment, the movable rig electrical subsystem comprising a rig electrical subsystem input transformer;
- a stationary primary power supply subsystem remote from the movable rig electrical subsystem; and
- an intermediate electrical subsystem comprising no more than two three-phase intermediate conductors electrically coupled to the stationary primary power supply subsystem and the rig electrical subsystem input transformer.
8. The drilling rig power system of claim 7, wherein the intermediate electrical subsystem enables the movable rig electrical subsystem to travel away from the stationary primary power supply subsystem while maintaining electrical communication with the stationary primary power supply subsystem.
9. The drilling rig power system of claim 7, wherein the no more than two three-phase intermediate conductors are retractable to enable the movable rig electrical subsystem to travel toward the stationary primary power supply subsystem while maintaining electrical communication with the stationary primary power supply subsystem.
10. The drilling rig power system of claim 7, wherein the no more than two three-phase intermediate conductors are configured to carry intermediate power at a high voltage.
11. The drilling rig power system of claim 7, wherein at least one of the no more than two three-phase intermediate conductors is included in a composite intermediate cable structure that comprises the intermediate conductor and a control cable for communicating data between a rig unit and subsystems remote from the rig unit.
12. The drilling rig power system of claim 7, wherein the rig electrical subsystem input transformer transforms intermediate power received through the no more than two three-phase intermediate conductors at a high voltage to rig power at a voltage lower than the high voltage.
13. The drilling rig power system of claim 7, wherein the intermediate electrical subsystem comprises a conductor carrier reel configured to support the no more than two three-phase intermediate conductors for rotation about a conductor carrier reel axis during extension or retraction of the intermediate conductor.
14. A method of powering a movable drilling rig unit, comprising:
- transmitting primary power at a voltage that is less than a high voltage from a stationary power supply subsystem to an intermediate subsystem input transformer;
- transforming the primary power at the intermediate subsystem input transformer into intermediate power at the high voltage;
- transmitting the intermediate power from the intermediate subsystem input transformer to a rig electrical subsystem input transformer on the movable drilling rig unit through a high voltage intermediate conductor;
- transforming the intermediate power at the rig electrical subsystem input transformer into rig power at another voltage that is lower than the high voltage; and
- transmitting the rig power from the rig electrical subsystem input transformer to a plurality of rig equipment on the movable drilling rig unit.
15. The method claim 14, wherein the another voltage of the primary power is at or below 690 Volts AC, and the high voltage of the intermediate power is at or above 2300 Volts AC.
16. The method claim 14, wherein the voltage of the rig power is at or below 690 Volts AC.
17. The method claim 14, wherein the high voltage intermediate conductor comprises no more than a set of conductor members for carrying three-phase electrical current.
18. The method claim 14, comprising:
- transmitting the intermediate power from the intermediate subsystem input transformer to the rig electrical subsystem input transformer on the movable drilling rig unit through an additional high voltage intermediate conductor.
19. A method of powering a movable drilling rig unit, comprising:
- transmitting primary power from a stationary power supply subsystem to a plurality of rig equipment on a moveable drilling rig unit through no more than two three-phase intermediate conductors.
20. The method of claim 19, comprising:
- supporting the no more than two three-phase intermediate conductors on a conductor carrier reel for rotation about a conductor carrier reel axis during extension or retraction of the no more than two three-phase intermediate conductors.
Type: Application
Filed: Jul 27, 2020
Publication Date: Nov 12, 2020
Applicant: ORION HOLDCO LLC (Houston, TX)
Inventors: Norman S. Myers (Spring, TX), David Carroll (Pinehurst, TX)
Application Number: 16/939,733