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

Table 3

Gray Level Matrix Statistics of typical faults indicator card.

	𝑓1	𝑓2	𝑓3	𝑓4	𝑓5	𝑓6
Top pump bumping	2.7046	29.6603	−0.3710	2.9569	0.0589	0.9699
Bottom pump bumping	2.0381	29.292	−0.14445	2.4059	0.0568	0.9796
Broken-dropped of sucker rod	0.0078	20.3339	−0.1684	2.4799	0.0710	0.9634
Insufficient fluid supply	−4.1172	59.7812	−0.7084	2.6101	0.0483	0.9753
Leakage of traveling valve	2.4658	40.9686	−0.5122	3.1043	0.0505	0.9742
Leakage of standing valve	3.8604	23.7471	−0.0216	2.2812	0.0618	0.9684
Leakage of both valves	0.3887	35.5648	0.0830	2.4249	0.0518	0.9735
Stuck piston	−9.0381	67.0591	−0.6385	2.2935	0.0454	0.9768
Gas lock	−5.2549	60.6294	−0.6209	2.2908	0.0473	0.9759
Liquid hammer	0.3276	43.7525	−0.6760	3.4674	0.0530	0.9729
Sand inflow	2.6519	25.0238	−0.1072	2.3713	0.0620	0.9682
Plunger out pump barrel	1.3003	37.3400	−0.1966	2.6507	0.0521	0.9734