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Variable leverage oil field pump jackIn a heavy-duty pump jack as used in oil well pumping, a leverage beam is oscillated by a motor-driven crank and the leverage beam acts upon the walking beam through an adjustable stroke controller.C. Arthur Davis...
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Variable leverage oil field pump jack 来自 百度文库 喜欢 0 阅读量: 13 申请(专利)号: US06/378509 申请日期: 19820517 公开/公告号: US04492126A 公开/公告日期: 19850108 申请(专利权)人: DAVIS; C. ARTHUR 发明人: CA Davis 摘要: In a heavy-duty pump jack as used in oil well ...
A cast iron shiv wheel connects the jerker to the pump jack. Photo by Al Hayward Cast iron field wheels are hubs for the jerker line Photo by Al Hayward 17 17 Click to see What’s New The Audio Driving Tour includes a stop at the Fairbank Oil barn mural, first painted in 1981 when...
· Pump Parts Sample Provided Product Description Description Customized Counter Weight for Oil Lifting Pumping Jack Pumping Unit by Lost Foam Casting Material Stainless steel, carbon steel, titanium alloy, high chrome, cast iron, bronze, ductile iron, brass,...
Pump jack extracting oil from oil well; 1969 - HD stock video Sequence of close up shots of pumpjack, pump jack extracting crude oil from oil well in field, crude oil pump station, Romania; 1969 (217-69-01 - 05/08/1969 - AEXZ288W) Save PURCHASE...
1. In an oil well pump uiack including a supporting base, a motor` cylinder on the base adapted to be positioned with its axis in alignment with the axis of the well, an annular piston in the cylinder, a sleeve within the cylinder concentric therewith and packing means between outer ...