Oil well blow-out preventer and sealing device
US5746249A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Nov 12, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/88046
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An oil well blow-out preventer and sealing device for use on an oil well equipped with a well casing, a wellhead, a production tubing string, and a pump rod receivable within the production tubing string. The blow-out preventer and sealing device comprises a central housing member that includes a flow passageway and a pump rod passageway, blow-out prevention means and pump rod passageway sealing means, both contained within the central housing member. The flow passageway is in communication with the production tubing string and provides a means for fluid to be removed from the well while the pump rod passageway provides a means for entry of the pump rod into the well. The blow-out prevention means includes a pair of rams that are adjustable to seal around the pump rod to prevent the accidental loss or spillage of oil or fluid from the well. The pump rod passageway sealing means prevents the spillage of fluids from the oil well upon the breakage or removal of the pump rod from said pump rod passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.