TREA

Valve arrangements for boreholes or wells

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Industry

  • CPC
  • E21B34/00
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21BEARTH DRILLING

Current Industry

E21B34/00Valve arrangements for boreholes or wells

Sub Industries

E21B34/02in well heads E21B34/04in underwater well heads E21B34/045adapted to be lowered on a tubular string into position within a blow-out preventer stack E21B34/06in wells E21B34/063Valve or closure with destructible element E21B34/066electrically actuated E21B34/08responsive to flow or pressure of the fluid obtained E21B34/085with time-delay systems E21B34/10operated by control fluid supplied from above ground E21B34/101with means for equalizing fluid pressure above and below the valve E21B34/102with means for locking the closing element inopen or closed position E21B34/103with a shear pin E21B34/105retrievable, e.g. wire line retrievable E21B34/106the retrievable element being a secondary control fluid actuated valve landed into the bore of a first inoperative control fluid actuated valve E21B34/107the retrievable element being an operating or controlling means retrievable separately from the closure member E21B34/108with time delay systems E21B34/12operated by movement of casings or tubings E21B34/125with time delay systems E21B34/14operated by movement of tools E21B34/16Above-ground control means therefor
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