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Schlumberger Oilfield Glossary: wellhead Listen to this article ( 5 minutes ) This audio file was created from a revision of this article dated 9 June 2021 ( 2021-06-09 ) , and does not reflect subsequent edits.

In March of 2012, Schlumberger announced an agreement with Altor Fund II for the acquisition of SPT Group. The acquisition was completed in Q2. SPT Group, founded in 1971, was headquartered in Norway employing approximately 280 people in 11 countries at the time of the acquisition.

A mud motor (or drilling motor) is a progressive cavity positive displacement pump (PCPD) placed in the drill string to provide additional power to the bit while drilling. . The PCPD pump uses drilling fluid (commonly referred to as drilling mud, or just mud) to create eccentric motion in the power section of the motor which is transferred as concentric power to the drill

This is a list of oilfield service companies – notable companies that provide services to the petroleum exploration and production industry but do not typically produce petroleum.

In the petroleum industry, a well test is the execution of a set of planned data acquisition activities. The acquired data is analyzed to broaden the knowledge and increase the understanding of the hydrocarbon properties therein and characteristics of the underground reservoir where the hydrocarbons are trapped.

In geophysics and reflection seismology, amplitude versus offset (AVO) or amplitude variation with offset is the general term for referring to the dependency of the seismic attribute, amplitude, with the distance between the source and receiver (the offset).