Pre-formed stress rings for inflatable packers

Pre-formed wear pads for drill stabilizers

Pre-set torque limiter sub

Precision drill grinding collector

Preconditioning an oilfield reservoir

Precured coated particulate material

Precussion actuated core sampler

Prefabricated mine overcast arch and the like

Prefabricated support and covering structure, particularly...

Preferential solution mining process

Preferred embodiment

Preform device and processes for coating and/or lining a...

Preform or matrix tubular structure for well casing

Preformed tooth for tooth bit

Preload headboard for an elongate prop

Prepacked flush joint well screen

Prepacked multi-graded sand screen

Prepacked screen

Prepacked well screen and casing assembly

Preparation of aqueous solutions of polyacrylamides suitable...