Pump-off control by integrating a portion of the area of a...

Details Pump-off control by integrating a portion of the area of a... Pump-off control by integrating a portion of the area of a...

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 49/02 (2006.01) F04B 49/06 (2006.01) E21B 47/00 (2006.01)

Patent

CA 2123784

New apparatus and methods are disclosed for controlling the operation of a rod-pumped oil well (shown generally in Fig. 1). The load on (30, 32, 62, 100, 108) and position of (40, 48, 50, 64, 102, 108) the rod string (4, 8) are measured, an integration calculation (116) related to the work done during a portion of the downstroke (97, 98) is performed, and the result is compared (110) to a reference value (120), to detect a pumped-off condition in the well.

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