Throttle unit for dump bailer and method of blocking a water out zone in a production well utilizing the same
US7735550B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2007 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Nov 9, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/105
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of blocking a water out zone in a production well includes the steps of connecting a throttle unit to a dump bailer, wherein the throttle unit is internally defined a flowing space, which can be adjusted in size to thereby control a flow rate of cement for blocking the water out zone; loading the cement into the dump bailer; slowly lowering down the loaded dump bailer to the water out zone in the production well; opening an outlet of the dump bailer under control, so that the cement flows from the dump bailer into the throttle unit and is released at a flow rate preset by adjusting the size of the flowing space; allowing the released cement to load up in the water out zone and slowly permeate into a gravel layer in the production well before becoming cured to block the water out zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.