| 摘要 |
The borehole packer is for sealing the annular space around a pipe in a borehole. The packer is pre-manufactured, in-factory. To give the packer the rigidity it needs for handling and transport, the packer is built around an inner sleeve of rigid (metal) mesh. Alternatively, the packer may be built around a cardboard tube, which is discarded as the packer is assembled onto the pipe. When the packing material is bentonite, the bentonite may be compression-moulded into annular-rings, and the packer is built up from the rings.
|
