Research on Feature Extraction of Indicator Card Data for Sucker-Rod Pump Working Condition Diagnosis

Table 1

Normalized Fourier Descriptors of 12 typical fault indicator cards.

	FD1	FD2	FD3	FD4	FD5	FD6	FD7	FD8	FD9	FD10
Top pump bumping	1	0.04825	0.06673	0.00921	0.01938	0.01228	0.01789	0.00373	0.00615	0.00368
Bottom pump bumping	1	0.04190	0.06150	0.01079	0.02105	0.00580	0.02075	0.00018	0.00525	0.00382
Broken-dropped of sucker rod	1	0.00256	0.07137	0.04122	0.00181	0.00423	0.01041	0.00278	0.00612	0.00312
Insufficient fluid supply	1	0.09135	0.07921	0.03970	0.02756	0.00268	0.00274	0.02133	0.00656	0.00519
Leakage of traveling valve	1	0.02729	0.08138	0.01280	0.02071	0.02071	0.01073	0.00803	0.00936	0.00458
Leakage of standing valve	1	0.04080	0.08172	0.01214	0.02129	0.01990	0.00740	0.00619	0.00890	0.00371
Leakage of both valves	1	0.00256	0.08158	0.01256	0.02517	0.01928	0.00683	0.00725	0.00912	0.00369
Stuck piston	1	0.00823	0.07259	0.01193	0.00158	0.00925	0.00957	0.00458	0.00349	0.00344
Gas lock	1	0.08365	0.06759	0.02358	0.02135	0.00245	0.00256	0.02325	0.00589	0.00623
Liquid hammer	1	0.09195	0.06064	0.02082	0.02073	0.00283	0.00255	0.04195	0.00764	0.00082
Sand inflow	1	0.00925	0.07436	0.00564	0.02577	0.00556	0.01728	0.00058	0.00278	0.00166
Plunger out pump barrel	1	0.04255	0.08212	0.01223	0.02019	0.01625	0.00722	0.00539	0.00693	0.00316