Patent ID: 9593545
Date: 2017-03-14
CPC Classifications: E21B

Claim:
1. A method of delivering fluid material into a hole via a tubular string, the method comprising: opening a bypass port in said tubular string located in a drilled hole, the bypass port being provided above fluid outlets in the distal end of the string; providing a plug with a cylindrical body having an outer diameter and an external profile provided on the cylindrical body, which profile extends beyond the outer diameter of the cylindrical body; providing a sleeve in the string, the sleeve defining a cylindrical bore having an internal diameter larger than the outer diameter of the cylindrical body of the plug, and the sleeve having an internal seat which extends inwardly of the inner diameter of the cylindrical bore; translating the plug into the string; translating the plug into the sleeve until the external profile lands on the internal seat such that a gap is present between the cylindrical body of the plug and the cylindrical bore of the sleeve, and a smaller gap is present between the cylindrical body of the plug and the internal seat; blocking the string with the plug below the port; delivering said fluid material through the string from surface, the material passing through the bypass port and into said drilled hole; and locking fluid in the string between the plug and the fluid outlets, at least in response to a reverse flow pressure, whereby fluid is prevented from passing up the string and past the plug.