Claims
- 1. A method for laying a pipeline in an at least near neutral buoyancy condition comprising sealing a gas into at least part of a pipe string between a pipelay vessel at one end of the pipe string and a pressure releasable plug within the pipe string, connecting the pipe string to another pipe end, flooding the pipe string and releasing the plug with fluid pressure, and passing the plug out of the pipe string with the fluid pressure.
- 2. The method of claim 1 wherein the plug grips the wall of the pipe string until a predetermined pressure is achieved on the plug following flooding of the pipe string.
Parent Case Info
This is a division of application Ser. No. 278,937, filed June 30, 1981, now U.S. Pat. No. 4,390,043.
US Referenced Citations (3)
Divisions (1)
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Number |
Date |
Country |
Parent |
278937 |
Jun 1981 |
|