| 摘要 |
A method of delivering material, typically lost circulation material (LCM), into a hole via a tubular string comprises: opening a bypass port (32) in a tubular string located in a drilled hole, the bypass port being provided above fluid outlets (28) in the distal end of the string,- delivering material through the string from surface, the material passing through the bypass port and into the drilled hole; and locking a volume of fluid in the string between the bypass port and the fluid outlets such that fluid is prevented from passing from the hole into the string via the fluid outlets. |
