| 摘要 |
<p>The invention relates to a pneumatic hydraulic pump, designed mainly for testing oil drilling equipment (swivel flow head, landing head, etc.) or other equipments, at very high pressure. The high pressure pump, according to the invention, consists of a plunger cylinder, controlled by a pneumatic block, equipped with a double-action piston, continuously supplied by one or more distributors. The pneumatic block piston rod is fitted to the rod of the hydraulic block plunger through an articulation, also being equipped inside with an opening in which can slide a direction-changing rod; this direction-changing rod changes the position of a control air distributor rod.</p> |
