Injection head for carrying out jet grouting processes
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United States of America Patent
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Nov 5, 2013
Grant Date -
Feb 24, 2011
app pub date -
Dec 29, 2008
filing date -
May 6, 2008
priority date (Note) -
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Abstract
An injection head includes an upper inlet pipe (12) for receiving fluid from a set of tubular rods which can be mounted above the head, at least a first pipe (13) having a curved intermediate portion (14) which connects the upper inlet pipe (12) to at least one lateral injection nozzle (11), at least a second pipe (15) for conveying a fluid from the inlet pipe (12) to a lower outlet pipe (17) which can be connected to a drilling tool. The injection head also has valve (20-23) which can be actuated to cut off the flow of the fluid towards the lower outlet pipe (17). The valve is located in a position downstream of the upper inlet pipe (12) and above, or upstream of, the lateral nozzles (11) and the second pipes (15).
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