Title:
【発明の名称】水力式穿孔用ジャーに使用する複動式加速装置
Document Type and Number:
Japanese Patent JPH06509852
Kind Code:
A
Abstract:
A double acting accelerator 1 includes a mandrel 2 arranged in a housing 3 for sliding longitudinal movement. A pair of pistons 89, 111 are positioned radially between the housing 3 and mandrel 2 to form a substantially sealed chamber 88 longitudinally therebetween. Movement of the mandrel 2 in a first direction urges the first piston 89 toward the second piston 111, thereby greatly increasing the pressure of fluid in the chamber 88. Movement of the mandrel 2 in a second, opposite direction urges the second piston 111 toward the first piston 89 to, likewise, greatly increase the pressure of fluid in the chamber 88. Thus, a large amount of energy is stored in the accelerator 1 independent of the relative direction of movement of the mandrel 2 and housing 3.
Inventors:
Robert W. Evans
Application Number:
JP50429093A
Publication Date:
November 02, 1994
Filing Date:
July 02, 1992
Export Citation:
Assignee:
Daily Petroleum Services Corporation
International Classes:
E21B17/07; E21B31/107; E21B31/113; (IPC1-7): E21B31/107
Attorney, Agent or Firm:
Heikichi Odashima