Force Balanced Reciprocating Valve For MUD Pulse Telemetry
Publication Date: 2005-Jun-30
The IP.com Prior Art Database
The present invention relates to drilling fluid telemetry systems and, more particularly, to a telemetry system incorporating a (reciprocating) pulser system for modulating the pressure of a drilling fluid circulating in a drill string within a well bore. State of the art positive pulsers are either passively operated (UPU, BCPM) to reduce the power consumption or actively pushed against the high hydraulic forces (Teleco). In order to reduce the risk of plugging an actively controlled reciprocating valve is preferred. This invention describes the possibility to reduce the power consumption and describes in addition a concept for a reciprocating valve without dynamic oil exchange with a compensator.