Offshore staff
HOUSTON --Schlumberger has developed FUTUR active-set cement technology that automatically seals microleaks in a cement sheath.
Schlumberger says the active components of the FUTUR cement system remain dormant after pumping and placement of the primary cementing operation until it is exposed to hydrocarbons, such as those seeping through cracks or microannulae in the cement sheath. Upon activation by contact with hydrocarbons, the FUTUR cement sheath self-repairs, says the company.
"FUTUR cement system represents a major technological breakthrough that solves several vexing problems that have impacted the industry for some time," says Belgacem Chariag, president, Well Services, Schlumberger. "In underground gas storage wells in Germany and Italy, the technology had a double benefit. In addition to preventing annular pressure buildup, the technology sealed against gas leaks into depleted zones that would have resulted in significant financial losses for the well owners over time."
Schlumberger explains this new technology can be mixed and pumped as a lead or tail system during any primary cement job. The properties of this system are comparable to those of conventional cements meaning it can be pumped with standard cementing equipment and no additional equipment or personnel are required, says the company.
12/04/2007
