Well system
First Claim
1. A system for conveying a well apparatus in a well, comprising:
- a composite umbilical having a conductor disposed in a wall of said composite umbilical;
a propulsion system attached downhole to said composite umbilical; and
said composite umbilical including a tube which is non-isotropic and which carries axial loads placed on said composite umbilical.
2 Assignments
0 Petitions
Accused Products
Abstract
A drilling system includes a work string supporting a bottom hole assembly. The work string including lengths of pipe having a non-metallic portion. The work string preferably includes a composite umbilical having a fluid impermeable liner, multiple load carrying layers, and a wear layer. Multiple electrical conductors and data transmission conductors are embedded in the load carrying layers for carrying current or transmitting data between the bottom hole assembly and the surface. The bottom hole assembly includes a bit, a gamma ray and inclinometer instrument package, a propulsion system with resistivity antenna and steerable assembly, an electronics section, a transmission, and a power section for rotating the bit. The electrical conductors in the composite umbilical provide power to the electronics section and may provide power to the power section. The data transmission conduits in the composite umbilical transmit the data from the downhole sensors to the surface where the data is processed. The propulsion system includes two or more traction modules connected by rams disposed in cylinders for walking the bottom hole assembly up and down the borehole. The propulsion system includes a steerable assembly, controlled from the surface, for changing the trajectory of the borehole.
333 Citations
69 Claims
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1. A system for conveying a well apparatus in a well, comprising:
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a composite umbilical having a conductor disposed in a wall of said composite umbilical;
a propulsion system attached downhole to said composite umbilical; and
said composite umbilical including a tube which is non-isotropic and which carries axial loads placed on said composite umbilical.
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2. A system for conveying a well apparatus in a well from the surface, comprising:
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a composite umbilical having a flowbore and forming an annulus in the well to circulate fluids through the flowbore and annulus;
a propulsion system attached downhole to said composite umbilical and powered by the circulating fluids; and
said composite umbilical including a tube having a modulus of elasticity which is not the same in all axes. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
at least one end connector disposed on ends of adjacent lengths and receiving one end of said liners, load carrying layers, electrical conductor and data transmission conductor; and
said end connector having conductor connectors for connecting said electrical conductors and said data transmission conductors and having seals to seal said flowbore through said composite umbilical.
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11. The system of claim 2 further including a control at the surface receiving and sending signals downhole to and from said propulsion system and the well apparatus via a conductor in a wall of said composite umbilical.
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12. The system of claim 2 further including:
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a control at the surface controlling the drilling of the well;
said composite umbilical having a data transmission conduit coupled to said control;
the well apparatus including a drill bit coupled to said propulsion system for drilling a borehole in the well;
a steerable assembly coupled to said propulsion system and said data transmission conduit;
an orientation assembly coupled to said propulsion system and sending signals through said data transmission conduit to said control;
said steerable assembly and propulsion system receiving signals from said control;
said steerable assembly adapted to move said drill bit three dimensionally within the borehole in response to said signals received by said steerable assembly; and
said propulsion system adapted to move said drill bit upstream or downstream within the borehole in response to said signals received by said propulsion system.
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13. The system of claim 12 further including a magnetometer and an inclinometer which provide representative signals of the borehole'"'"'s radial orientation and inclination for transmission to said control.
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14. The system of claim 2 wherein said composite umbilical includes load carrying layers.
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15. The system of claim 14 further including a conductor embedded in said load carrying layers, said conductor being embedded linearly, wound spirally or braided among said layers.
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16. The system of claim 15 wherein said conductor conducts two-way communications with the surface.
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17. The system of claim 16 wherein said conductor is multi-plexed to conduct two-way communication through a single conductor.
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18. A system for conveying a well apparatus in a well, comprising:
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a composite umbilical having a conductor disposed in a wall of said composite umbilical;
a propulsion system attached downhole to said composite umbilical; and
said composite umbilical including a tube having a modulus of elasticity which is not linear and having a yield strain which allows said tube to withstand loads placed on said composite umbilical.
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19. A system for conveying a well apparatus in a well, comprising:
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a composite umbilical;
a propulsion system attached downhole to said composite umbilical; and
one or more sensors being housed within a wall of said composite umbilical.
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20. A system for conveying a well apparatus in a well, comprising:
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a composite umbilical for supplying fluids downhole in the well;
a propulsion system attached downhole to said composite umbilical;
said composite umbilical including a tube engineered to cause said composite umbilical to achieve substantially neutral buoyancy in the fluids in the well;
said tube having a modulus of elasticity which is not the same in all axes.
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21. A system for conveying a well apparatus in a well, comprising:
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a composite umbilical for supplying fluids downhole in the well;
a propulsion system attached downhole to said composite umbilical;
said composite umbilical being engineered to cause said composite umbilical to achieve substantially neutral buoyancy in the fluids in the well;
one or more sensors being housed within a wall of said composite umbilical.
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22. A system for conveying a well apparatus in a well from the surface, comprising:
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a composite umbilical having a flowbore and forming an annulus in the well to circulate fluids through the flowbore and annulus;
said composite umbilical having an energy conductor disposed in a wall of said composite umbilical;
a propulsion system attached downhole to said composite umbilical;
said composite umbilical including a tube having a modulus of elasticity which is not the same in all axes;
said propulsion system being powered by the circulating fluids and being a part of a bottom hole assembly; and
said energy conductor supplying power to said bottom hole assembly. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A system for use in a well from the surface, comprising:
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a composite tube having fibers in a predetermined orientation bonded in a matrix;
said composite tube having a modulus of elasticity which is not the same in all axes and which withstands axial loads;
said composite tube including a liner and a plurality of conductors disposed between said liner and said fibers; and
a propulsion system attached downhole to said composite tube and conveying a well apparatus, one of said conductors supplying power to said well apparatus. - View Dependent Claims (44, 45, 46, 47, 48, 49)
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50. A system for conveying a well apparatus through a wellbore having wellbore fluids, comprising:
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a composite umbilical having a conductor disposed in a wall of said composite umbilical;
a propulsion system attached downhole to said composite umbilical; and
said composite umbilical having a density substantially the same as that of the wellbore fluids and a tube having a modulus of elasticity which is,not the same in all axes. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57)
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58. A system for conveying a well apparatus, comprising:
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a composite tube made of oriented layers of fibers in a matrix and including a liner and a plurality of conductors disposed between said liner and said fiber layers;
said composite tube having a yield strain which allows said composite tube sufficient bending to be spooled onto a spool;
said composite tube having a modulus of elasticity which is not the same in all axes; and
a propulsion system attached downhole to said composite tube adapted for attachment to the well apparatus. - View Dependent Claims (59, 60, 61, 62, 63, 64)
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65. A system for conveying a well apparatus through a wellbore having wellbore fluids, comprising:
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a composite tube made of oriented layers of fibers in a matrix and including a liner and a plurality of conductors disposed between said liner and said fiber layers;
said composite tube having a conductor disposed in a wall of said composite tube and having a modulus of elasticity which is not the same in all axes;
said composite tube having a yield strain, modulus of elasticity in an axial direction, and a yield stress, said modulus of elasticity in the axial direction being determined by dividing the yield strain into the yield stress required for said composite tube to be spoolable; and
a propulsion system attached downhole to said composite tube. - View Dependent Claims (66, 67)
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68. A system for drilling a wellbore using drilling fluids having a specific gravity between 8.4 and 12.5 pounds per gallon, comprising:
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a composite umbilical having a conductor disposed in a wall of said composite umbilical and a tube having a modulus of elasticity which is not the same in all axes;
said composite umbilical having a density substantially the same as that of the drilling fluids; and
a propulsion system attached downhole to said composite umbilical applying a pull force on said composite umbilical between zero and 14,000 pounds depending upon the specific gravity of the drilling fluids. - View Dependent Claims (69)
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Specification