High-pressure injection proppant system
High-pressure pipe string for continuous fusion drilling of...
High-pressure sealing means for longitudinally movable parts...
High-pressure vaporization process of secondary recovery of...
High-pressure, tubing-to-liner annulus seal for a well
High-strength sealed connection for expandable tubulars
High-strength, high-toughness matrix bit bodies
High-strength, high-toughness matrix bit bodies
High-strength/high-toughness alloy steel drill bit blank
High-temperature diverting agent system for the oil industry...
High-temperature downhole devices
High-velocity discharge equalizing system and method
High-volume sand trap and method
High/low slow safety valve
Highly reinforced elastomer for use in downhole stators
Highly saline ethoxylated surfactant system for oil recovery
Hinge joint of bottom-hole helical planetary hydraulic machine
Hinged conductor casing for deviated driving and method...
Hinged drilling tool
Hinged jet pump, particularly for activating water or...