Patent ID: 8753041
Filing Date: 2014-06-17
Classification: E21B,E21D

Abstract:
1. An injection, sealing, valving and passageway system for injecting fluids for use with a rock bolt, a cable bolt or a hollow injection bar, comprising: an injector having a first plurality of fluid passageways configured for fluid to flow along one of said first plurality of fluid passageways without cross contamination with fluid flowing along another one of said first plurality of fluid passageways; a valving assembly contained within a hollow member of the rock bolt or cable bolt or injection bar, the valving assembly having a second plurality of passageways communicating with said first plurality of passageways; a connection providing a hydraulic seal between the first passageways of the injector and the second passageways of the valving assembly both in presence and absence of relative rotation between the injector and the valving assembly; and at least one of the second passageways has at least one one-way flow valve to prevent backflow of fluid into the injector, wherein fluids injected through at least two of said first plurality of passageways of the injector are kept separate until downstream of the one way flow valve.