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
  • E21B19/10—Slips; Spiders ; Catching devices

Definitions

• the rotary seal system includes an interlock control such that the pressurized fluid is prevented from energizing the rotary seal assembly when the rotary housing is rotating.
• one rotary seal is utilized as a slips down seal in fluid communication with a slips down second conduit arranged such that pressurized fluid flowing through the slips down second conduit activates the fluid actuated operator to extend the slip
• the second rotary seal is utilized as a slips up seal in fluid communication with a slips up second conduit arranged such that pressurized fluid flowing through the slips up second conduit activates the fluid actuated operator to retract the slip.
• the third rotary seal is utilized as a slips set seal and is arranged such that when the fluid actuated operator has been fully extended or retracted, the pressurized fluid is directed into the slips set second conduit, through the slips set seal to a slips set first conduit arranged in fluid communication with a fluid detector capable of detecting the presence of the pressurized fluid in the slips set first conduit and communicating that presence to an operator.
• the rotary support table according to the invention may further include an annular adjustment ring for adjusting the position of the rotary housing in relation to the stationary housing such that the rotary seals fully seal the passage between the fluid conduits within the stationary and rotary housings.
• FIG. 4 is a close-up cut-away side view of a rotary support table according to this invention
• FIG. 5 is a cross-sectional side view of a rotary support table according to this invention
• FIG. 6 is a front view of a set of rotary seals according to this invention.
• FIG. 8 is an operational schematic of a power slip hydraulic system according to this invention.
• the slip assembly includes a plurality of slips having tapered outer walls that are adapted to engage the tapered inner wall 30 of the slip bowl 20 such that the slip assembly is prevented from lateral, but not rotational movement within the slip bowl 20.
• each slip carries along its inner surface an engaging insert designed to gripingly engage the drill string to prevent it from falling into the central bore 12.
• the wiper seals 74a, 74b and 74c are designed to provide a wiping seal with the outer surface 28 of the rotary slip bowl 20 such that the hydraulic communication seals 72, the inlets 66 and the outlets 68 disposed between the wiper seals 74 are kept free from foreign substances.
• the wiper seals 74a, 74b and 74c can include any seal design suitable for providing fluid sealing means across the gap between the outer surface 28 of the rotary slip bowl 20 and the inner surface 26 of the slip ring 24.
• the wiper seals 74 could include conventional resilient polymer o-ring-type seals which apply a continuous and steady fluid sealing pressure against the outer surface 28 of the slip bowl 20.
• FIGs. 7 and 8 show schematic diagrams of one exemplary embodiment of the hydraulic power supply and control system according to the invention.
• the hydraulic seal inlets 66a, 66b, and 66c are connected through hydraulic tubing 64 to a series of control valves 84a, 84b and 84c which in turn connect the inlets to a hydraulic power source manifold 86.
• Hydraulic seal outlets 68a, 68b and 68c are connected through hydraulic drain lines 88 to the hydraulic power source manifold 86.
• the hydraulic system further includes a shuttle valve 96 which connects the hydraulic power source 60 to the slips set control valve 84b such that the slips set control valve 84b is activated automatically when either the slips up 84a or slips down 84c valves are opened.
• the hydraulic power system further includes a pressure sensitive slips set check valve 98 (FIG.
• the fluid then flows through the plurality of seal inlets 66c around the circumference of the seal 72c and into the slip bowl slips down inlets 61c disposed about the outer circumference of the slip bowl.
• the fluid then passes through slip bowl slips down conduit 94c, shown in FIG. 8, and into the actuating rams such that the actuators push a set of slips inwardly to engage the drillstem 14.
• the slips up and slips down lines 64a and 64c are connected to the slips set line 64b via a shuttle valve 96 such that when the pressurized fluid passes through one of the lines the shuttle valve 96 is opened to allow pressurized fluid to also energize the slips set seal 72b such that the slips set seal 72b also engages the outer surface of the slip bowl 28 such that a fluid passage is formed between the slip bowl slips set inlet 61b and the slips set seal inlet 66b.
• slips set check valve 98 which is in fluid communication with both the slips up and slips down conduits 94a and 94c, to open allowing the fluid to move from the slip bowl slips down or up conduits 94a or 94c and into the slip bowl slips set conduit 94b.
• the fluid passes outward through the slip bowl slips set inlet 61b, in fluid communication with the slip bowl slips set conduit 94b and into the slips set seal 72b.
• the fluid then passes through the slips set seal inlets 66b and into the slips set line 64b such that the fluid interacts with the slips set control valve 84b signaling that the rams 40 have either been fully engaged or disengaged, and thus that the associated slips are fully engaged or disengaged from the drillstem, i.e., that the slips are in a "set” position.
• the operator can once again start rotation of the rotary slip bowl, which in turn will automatically pressurize the interlock line 92 preventing the activation of the control valves 84 to engage the rams 99.

Landscapes

• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Mining & Mineral Resources (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Environmental & Geological Engineering (AREA)
• Fluid Mechanics (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Joints Allowing Movement (AREA)
• Earth Drilling (AREA)
• Sawing (AREA)
• Constitution Of High-Frequency Heating (AREA)
• Drilling And Boring (AREA)
• Ladders (AREA)
• Sealing With Elastic Sealing Lips (AREA)
• Sealing Devices (AREA)
• Holding Or Fastening Of Disk On Rotational Shaft (AREA)
• Rotational Drive Of Disk (AREA)
• Iron Core Of Rotating Electric Machines (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (2)

Family

ID=23344231

Family Applications (1)

Country Status (10)

Cited By (1)

Families Citing this family (23)

Family Cites Families (19)

• 2002
  • 2002-12-20 JP JP2003560351A patent/JP2005515328A/ja not_active Ceased
  • 2002-12-20 CA CA002470653A patent/CA2470653C/en not_active Expired - Lifetime
  • 2002-12-20 AT AT02799266T patent/ATE463654T1/de not_active IP Right Cessation
  • 2002-12-20 AU AU2002364191A patent/AU2002364191A1/en not_active Abandoned
  • 2002-12-20 CN CNB028256492A patent/CN100335736C/zh not_active Expired - Lifetime
  • 2002-12-20 DE DE60235914T patent/DE60235914D1/de not_active Expired - Lifetime
  • 2002-12-20 US US10/325,184 patent/US6896048B2/en not_active Expired - Lifetime
  • 2002-12-20 WO PCT/US2002/040876 patent/WO2003060280A2/en not_active Ceased
  • 2002-12-20 EP EP02799266A patent/EP1458949B1/en not_active Expired - Lifetime
• 2004
  • 2004-06-17 NO NO20042533A patent/NO332177B1/no not_active IP Right Cessation

Also Published As

Similar Documents

Legal Events