Grouting method - chemical method
AssigneeHalliburton Company
InventorsL. Carter Knox, Clayton A. Moore
Life of this patent
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Abstract
An improved grouting method and arrangement using particulate material and aqueous solutions of alkali silicate materials confined between pile seal assembly and top of an offshore platform in sealing the annular space formed between either a jacket leg or pile sleeve and a pile driven therethrough or similar annular space of an offshore platform to support a column of grout thereon so that the annular space may ultimately be filled with grouting material.
Claims17
A method of grouting an annular space formed by an annular support member having an pile seal assembly thereon and a pile driven therethrough of an offshore platform, said annular space being located between said annular support member and said pile, said method comprising the steps of:
- injecting particulate material into said annular space above said pile seal assembly;
- injecting an alkali silicate material which floculates upon contact with a di- or multivalent cation fluid into said annular space above said pile seal assembly;
- and
- injecting cement or grout into said annular space above said pile seal assembly.
A method of grouting an offshore platform having a jacket portion including jacket legs thereon, each jacket leg having a pile driven therethrough forming an annulus between said jacket leg and pile, and a deck portion attached to the top of the jacket portion, a diaphragm assembly, a pile seal assembly forming an annular space between said jacket leg and pile and the top of said jacket leg, and a grout system including a first grout line extending from the top of said jacket leg to adjacent the bottom thereof, a grout control valve having the inlet thereof connected to the first grout line, a first valve outlet line connected to said annular space and a second valve outlet line connected to said annular space above said first valve outlet line, said method of grouting comprising the steps of:
- injecting particulate material into said annular space through said grout line, grout control valve and first valve outlet line;
- injecting an alkali silicate material which floculates upon contact with di- or multivalent cation fluid into said annular space through said grout line, grout control valve and first valve outlet line;
- and
- injecting cement or grout into said annular space through said grout line, grout control valve and second valve outlet line.
Dependencies are inferred from the claim text.