Cementing with electric line coiled tubing
US8220544B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2009 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Jun 18, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/206
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An open hole is drilled with coiled tubing that has an electric line. At the conclusion of drilling the drilling bottom hole assembly is removed and a liner running tool is connected between the coiled tubing and the liner. The electric line remains in the coiled tubing but spacers can be added to keep the lower end of the electric line away from the running tool. A wiper plug has a passage therethrough and a movable stinger that can hold open a pair of flapper valves. The liner is released from the running tool and cement is delivered through the stinger with a bit of excess that is above the running tool. The lifting of the stinger with the coiled tubing closes the flappers and allows circulation out of excess cement. Setting down on the coiled tubing allows a seal to re-engage in the deployment sleeve, allowing pressure to be placed against the wiper plug, such that it can be launched to displace the remaining cement within the liner into the annulus around the liner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.