Primary cementing

Primary leak containment device for well-heads

Primary transfer sub for dual concentric drillpipe

Primary well cementing methods and apparatus

Principal supporting structure for a portable machine used,...

Probablistic imaging with azimuthally sensitive mwd/lwd sensors

Probe isolation seal pad

Procede de diagraphie instantanee en cours de forage et...

Procede et appareillage de realisation du soutenement pour...

Procede et dispositifs le mettant en oeuvre, pour deplacer...

Procede pour rendre optimal l'avancement d'un outil de...

Procedure and production pipe for production of oil or gas...

Procedure for controlling a rock drill and rock drill for...

Procedure for determining an indicator of the stresses on a...

Procedure for drawing water from a ground water store

Procedure for measuring the rate of penetration of a drill bit

Procedures and equipment for profiling and jointing of pipes

Procedures and equipment for profiling and jointing of pipes

Procedures and equipment for profiling and jointing of pipes

Process and apparatus for cleaning particulate solids