| Title | Development of a Wireline Blowout Preventer for Usage on Producing Vapor-Dominated Geothermal Wells |
|---|---|
| Authors | Roesner, Raymond E.; Garney, Tom A. |
| Year | 1979 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Production; Steam; Safety; Equipment; USA; Castle Rock Springs; High Temperature; Pack Off; Wireline Lubricator; Wellhead Control; Control System; Field Test; Valves; Hydraulic; Elastomer; Seal; Dresser Industries; Bowen Tool Inc |
| Abstract | A reliable, low maintenance wellhead control system to support logging services in producing geothermal wells has been developed by Dresser Atlas in cooperation with Bowen Tools, Inc. Two hydraulic wireline blowout preventers (BOP's) were stacked in series over a well's master gate valve. Their internal components were modified to withstand steam flowing at 260°C (500°F), 3.45 MPa (500psi). The BOP was incorporated with an advanced four valve pressure equalization and monitoring system. High temperatures called for special hydraulic fluid and severe service pressure gauges. For safety, a pressure/temperature monitor and grease pack off were added. This new Geothermal Wellhead Control System proved itself in field tests earlier this year. |