CEMENTING A WELLBORE USING CEMENTING MATERIAL ENCAPLSULATEO IN A SHELL

摘要

A system for cementing a wellbore penetrating an earth formation into which a pipe extends. A cement material is positioned in the space between the wellbore and the pipe by circulated capsules containing the cement material through the pipe into the space between the wellbore and the pipe. The capsules contain the cementing material encapsulated in a shell. The capsules are added to a fluid and the fluid with capsules is circulated through the pipe into the space between the wellbore and the pipe. The shell is breached once the capsules contain the cementing material are in position in the space between the wellbore and the pipe.

主权项

1. A composition for use in a cementing process wherein the cement sets at a predetermined time, comprising:
a circulating fluid, capsules in said circulating fluid, a setting material encapsulated in said capsules, and a system for releasing said setting material from said capsules so that the cement sets at a predetermined time.