FI (list display)

  • E21B33/00
  • Sealing or packing boreholes or wells HB CC 2D129
  • E21B33/02
  • .Surface sealing or packing HB CC 2D129
  • E21B33/03
  • ..Well heads; Setting-up thereof [2006.01] HB CC 2D129
  • E21B33/035
  • ...specially adapted for underwater installations (E21B 33/043, E21B 33/064, E21B 33/076 take precedence) [3] HB CC 2D129
  • E21B33/037
  • ....Protective housings therefor [3] HB CC 2D129
  • E21B33/038
  • ....Connectors used on well heads, e.g. for connecting blow-out preventer and riser [2006.01] HB CC 2D129
  • E21B33/04
  • ...Casing heads; Suspending casings or tubings in well heads [2006.01] HB CC 2D129
  • E21B33/043
  • ....specially adapted for underwater well heads (E21B 33/047 takes precedence) [3] HB CC 2D129
  • E21B33/047
  • ....for plural tubing strings [3] HB CC 2D129
  • E21B33/05
  • ....Cementing-heads, e.g. having provision for introducing cementing plugs HB CC 2D129
  • E21B33/06
  • ...Blow-out preventers [3] HB CC 2D129
  • E21B33/064
  • ....specially adapted for underwater well heads [2006.01] HB CC 2D129
  • E21B33/068
  • ...having provision for introducing objects or fluids into, or removing objects from, wells (cementing-heads E21B 33/05) [3] HB CC 2D129
  • E21B33/072
  • ....for cable-operated tools (E21B 33/076 takes precedence) [3] HB CC 2D129
  • E21B33/076
  • ....specially adapted for underwater installations [3] HB CC 2D129
  • E21B33/08
  • ..Wipers; Oil savers HB CC 2D129
  • E21B33/10
  • .in the borehole HB CC 2D129
  • E21B33/12
  • ..Packers; Plugs (used for cementing E21B 33/134, E21B 33/16) HB CC 2D129
  • E21B33/122
  • ...Multiple-string packers HB CC 2D129
  • E21B33/124
  • ...Units with longitudinally-spaced plugs for isolating the intermediate space HB CC 2D129
  • E21B33/126
  • ...with fluid-pressure-operated elastic cup or skirt (E21B 33/122, E21B 33/124 take precedence) HB CC 2D129
  • E21B33/127
  • ...with inflatable sleeve (E21B 33/122, E21B 33/124 take precedence) HB CC 2D129
  • E21B33/128
  • ...with a member expanded radially by axial pressure (E21B 33/122, E21B 33/124 take precedence) HB CC 2D129
  • E21B33/129
  • ...with mechanical slips for hooking into the casing (E21B 33/122, E21B 33/124 take precedence) HB CC 2D129
  • E21B33/1295
  • ....actuated by fluid pressure [6] HB CC 2D129
  • E21B33/13
  • ..Methods or devices for cementing, for plugging holes, crevices or the like [2006.01] HB CC 2D129
  • E21B33/134
  • ...Bridging plugs HB CC 2D129
  • E21B33/136
  • ...Baskets, e.g. of umbrella type HB CC 2D129
  • E21B33/138
  • ...Plastering the borehole wall; Injecting into the formation HB CC 2D129
  • E21B33/14
  • ...for cementing casings into boreholes HB CC 2D129
  • E21B33/16
  • ....using plugs for isolating cement charge; Plugs therefor HB CC 2D129
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