Versatile fluid motor and pump

US4059165A · kind A · utility

Inventor

• Wallace Clark · Indianapolis, US

Key dates

• Filing date: Jul 14, 1976
• Grant date: Nov 22, 1977
• Expiry date: Jul 14, 1996

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B4/02
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

There is disclosed a fluid motor composed of a helical gear pair wherein an inner member has one or more external helical threads and a cooperating outer member has one or more internal helical threads, the number of helical threads on the inner and outer members differing by one. The outer member is secured to one of the sections of a water swivel which is conventional except that it has an axial intake, radial tube and inner member supporting guide, and means are associated with an end of the inner member and with the outer section of the water swivel to prevent relative rotation between said inner and outer members while permitting gyration with oscillation of the inner member in relation to the outer member. Each end of the device has a tapered thread. The motor may be used either end up. A drill pipe or suitable sub is threaded into one end of the device and a tool is threaded into the other end of the device, directly or with a sub between. In one embodiment the outer member of the gear pair is held stationary by the drill pipe which is threaded into it or with a sub between, and the tool which is threaded into the other end is rotated by the rotation of the inner member and …