An injection, sealing, valving and passageway system

E - Fixed Constructions – 21 – D

Patent

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Details

E21D 20/02 (2006.01) E21B 21/10 (2006.01)

Patent

CA 2737726

The invention provides an injection, sealing, valving and passageway system for use with hollow rock bolts and hollow injection bars used in mining, civil engineering, tunneling and construction including use with hollow self drilling rock bolts. The invention comprises a plurality of passageways with one or more one way flow valves along the passageways. The invention enables one or more fluids to be pumped into a hollow rock bolt or other hollow elongate member either sequentially or simultaneously without cross contamination of fluids in another passageway or back flow of fluids along the wrong passageway. The invention is typically used to install self drilling rock bolts whereby a drilling fluid is initially pumped through the hollow bolt during the drilling cycle, and then a two part chemical resin or cement grout is pumped through the hollow bolt to anchor the bolt in the borehole.

L'invention porte sur un système d'injection, d'étanchéité, de robinetterie et de passage destiné à être utilisé avec des boulons de roche creux et des barres d'injection creuses utilisées dans les mines, le génie civil, la construction de tunnels et la construction impliquant l'utilisation de boulons de roche auto-forants creux. L'invention comprend une pluralité de passages avec une ou plusieurs vannes unidirectionnelles le long des passages. L'invention permet à un ou plusieurs fluides d'être pompés dans un boulon de roche creux ou dans un autre élément allongé creux, soit de façon séquentielle, soit de façon simultanée, sans contamination mutuelle des fluides dans un autre passage ni retour d'écoulement de fluides le long du mauvais passage. L'invention est typiquement utilisée pour installer des boulons auto-forants, un fluide de forage étant initialement pompé à travers le boulon creux durant le cycle de forage, puis un coulis en ciment ou en résine à deux composants étant pompé à travers le boulon creux pour ancrer le boulon dans le trou de forage.

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