Apparatus and method for plugging voids in a ground stratum

Apparatus and method for reverse circulation cementing a...

Apparatus and method for reverse circulation cementing a...

Apparatus and method for sealing well bores and bore holes

Apparatus and method for temporarily plugging a tubular

Apparatus and method for the mechanical sequential release of ce

Apparatus and method for vibrating a casing string during cement

Apparatus and methods for preventing or limiting rotation of...

Apparatus and methods for use in cementing a casing string withi

Apparatus for coupling a tubular member to a preexisting...

Aqueous and petroleum gel method for preventing water-influx

Aqueous spacer composition compatible with drilling muds and cem

Aqueous treatment fluid and method of use

Arrangement and method for conducting substance and lock therefo

Arrangement and method for conducting substance and seal therefo

Attic oil reservoir recovery method

Bentonite nodules

Bidirectional disappearing plug

Bidirectional disappearing plug

Biodegradable dispersants for cement compositions and...