Claims
- 1. A well operating method comprising:
providing a valve in a tubing string; running the tubing string into a cased bore; sealing the tubing string in the cased bore; closing the valve to isolate a lower end of the bore; uncoupling the tubing string from the valve; retrieving the tubing string above the valve; running a replacement tubing string into the bore; coupling the replacement tubing string to the valve; and opening the valve to permit fluid communication between the lower end of the bore and the tubing string.
- 2. The method of claim 1, further comprising running the valve into the bore with the tubing.
- 3. The method of claim 1, wherein the tubing string is a production tubing string.
- 4. The method of claim 1, further comprising locating the valve towards the lower end of the tubing string.
- 5. The method of claim 1, further comprising sealing the tubing string in the cased bore using a packer.
- 6. The method of claim 5, further comprising locating the valve in the bore above a packer.
- 7. The method of claim 5, further comprising locating the valve in the bore below a packer.
- 8. A bore-drilling method comprising:
mounting a valve in casing lined with a bore; advancing the bore by drilling using a drill string passing through the valve; retrieving the drill string through the valve; closing the valve to isolate a lower end of the bore; and opening the valve to re-establish fluid communication with the lower end of the bore.
- 9. The method of claim 10, further comprising the step of monitoring the bore for conditions indicative of the formation of a problem the bore is about to encounter.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9911648.3 |
May 1999 |
GB |
|
RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent application Ser. No. 09/575,325 filed May 19, 2000, which claims priority of United Kingdom Patent Application No. 9911648.3 filed May 19, 1999.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09575325 |
May 2000 |
US |
Child |
10331274 |
Dec 2002 |
US |