LandOfFree - US Patents - Listing for Wells

Wells – With below and above ground modification – Eduction pump or plunger in well

Drive head for rotary down hole pump

Wells – Above ground apparatus – Inner member anchor or seal with lateral port

Drive pipe adaptor

Wells – Submerged well – Means removably connected to permanent well structure

Drive system for turning a swivel

Wells – Processes – Placing or shifting well part

Driving device for displacing an element in a conduit filled wit

Wells – Valves – closures or changeable restrictors – Operated by dropped element

Drop ball catcher apparatus

Wells – Processes – Destroying or dissolving well part

Drop ball sub and system of use

Wells – Processes – Placing or shifting well part

Drop ball sub and system of use

Wells – Valves – closures or changeable restrictors – Destructible element

Drop ball sub-assembly for a down-hole device

Wells – Processes – Perforating – weakening – bending or separating pipe at an...

Drop off method for perforating gun capsule charge carriers

Wells – Above ground apparatus – Well caps or casing heads

Dry pellet dispensing device for wells

Wells – Submerged well – Means removably connected to permanent well structure

Dry tree subsea well communications apparatus and method...

Wells – Submerged well – Means removably connected to permanent well structure

Dry tree subsea well communications apparatus using variable...

Wells – Processes – Producing the well

Dual action pumping system

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Dual action valve including a built in hydraulic circuit

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Dual action valve including at least two pressure responsive mem

Wells – Conduit wall or specific conduit end structure – Plural – parallel – nonconcentric conduits

Dual annulus production tool

Wells – Processes – Electric current or electrical wave energy through earth for...

Dual aquafer electrical heating of subsurface hydrocarbons

Wells – Above ground apparatus – Inner member anchor or seal with valve

Dual bore annulus access valve

Wells – Submerged well – Connection or disconnection of submerged members remotely...

Dual bore riser