Patent ID: 7429934
Filing Date: 2008-09-30
Classification: E21B

Abstract:
1. A mud pulse assembly for producing mud pulses for communicating during directional drilling data telemetry, comprising: a removable mud pulse generator for positioning a landing sub body, said removable mud pulse generator having a outlet end, and a retainer for releasably engaging said removable mud pulse generator in said landing sub body, said retainer engaging said mud pulse generator at or upstream of said outlet end, said retainer being remotely operable to release said removable mud pulse generator from said mud pulse assembly, wherein said retainer comprises at least one detent for retention of said removable mud pulse generator, and a coupler for preventing rotation of said removable mud pulse generator relative to said landing sub body, said removable mud pulse generator being adapted to receive said detent and engage said coupler, wherein said at least one detent is a spring-actuated ball detent, biased towards said removable mud pulse generator.