ACOUSTIC METHOD FOR MONITORING OF TECHNICAL CONDITIONS OF SUCKER-ROD PUMP AND TUBINGS Russian patent published in 1996 - IPC

FIELD: oil producing industry; applicable in monitoring technical conditions of sucker-rod pumps and tubings in producing wells irrespective of their crooking. SUBSTANCE: acoustic method for monitoring of technical conditions of sucker-rod pumps and tubings includes measurement, conversion, amplification and recording on the primary document of signal produced by pump operation, decoding of the document and adoption of the decision. Used as informative parameter is pressure differential in casing-borehole annulus at wellhead which is converted into symmetric antiphase a.c. signals and filtered from noises and amplified with suppression of inphase signals and electromagnetic hums. Hums are depressed by rejection of fundamental harmonic at industrial mains frequency. In course of conversion of pressure into electric signals, static potential is discharged which is produced in casing-borehole annulus at wellhead. EFFECT: higher efficiency. 2 cl, 1 dwg