ALRDC Technical Library

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GAS ANCHOR DESIGN CHANGES USED TO IMPROVE GAS SEPARATION IN COALBED METHANE OPERATIONS IN WYOMING
by: John C. Patterson, Nathan Leonard — Added 6/10/2009 12:00:00 AMSWPSC - PC Pump Design


Dewatering gas wells with progressing cavity pumps has been aggravated by gas ingestion into the pump. Typical gas anchor designs have not provided the necessary separation when the pumps are set in the producing interval to minimize the flowing bottom hole pressure. Gas and water impinging on large intake slots on the mud anchor appears to reduce the ability to separate gas. Larger slots also allow coal to enter the mud joint and plug of the dip tube. By reducing the intake slot size and adding vent holes, the gas separation performance has increased. One of the fundamental changes is to mechanically prevent gas and water entering the well bore from directly impinging on the vent holes. Case histories will be provided.

New Control Technology for Progressing Cavity Pumps
by: Kelly Woolsey, Andy Cordova, Jeffrey DaCunha — Added 9/20/2009 12:00:00 AMSWPSC - PC Pump Design


Variable Speed Drive technology has been adapted to work with rod pumping to increase run life, decrease failures and reduce operation costs. This paper will show the technology being used and show several examples of systems installed and the benefits from this technology.