Method and apparatus for placing foamed plugs
US3956439A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1974 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Nov 20, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
For manipulating a length of non-rigid tubing into position around a swing joint (which includes a 90.degree. fitting) in an underground pipe, a rigid guide tube (through which the non-rigid tubing may be passed) is utilized. The lower end of this guide tube is landed in the 90.degree. fitting, and a wedging member or whipstock, manipulatable from the surface, is operated to hold this end of the guide tube solidly in position in the 90.degree. fitting. After the guide tube is thus secured, the non-rigid tubing is passed down through the guide tube and around the 90.degree. fitting into a laterally-extending pipe; then, a foam-forming composition is pumped through the non-rigid tubing into this latter pipe to form a foamed plug therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.