| 摘要 |
FIELD: pumping liquids from oil wells. SUBSTANCE: pumping unit is carried on transport platform. Frame of trailer has vertical holes for mounting the members for lowering the frame on ground. Pumping unit includes also foldable walking beam support mounted on trailer frame, walking beam with head, crank mechanism, drive engine with reduction gear and mechanism for shifting the walking beam to transportation or working position. Walking beam support consists of two parts: movable and immovable. Immovable part of walking beam support is made in form of vertical guide members rigidly mounted on trailer frame. Movable part is mounted inside immovable one for motion over guide members and is connected with mechanism for shifting the walking beam to transportation or working position by means of rope device. Walking beam support is provided with locking device for fixing the movable part in upper working position. EFFECT: enhanced reliability irrespective of temperature conditions. 4 cl, 4 dwg
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