Goal was to minimize impact and ensure safety
An operators North Sea field was experiencing declining production
rates. A previously completed seismic survey of the field was reprocessed to
identify potentially accessible hydrocarbons remaining in the known reservoirs.
As a result, the operator updated its plans for future well workovers and new
well candidates. Because the operator was keenly attentive to the environmental
effects of uncontrolled hydrocarbon flow, especially in its mature North Sea
field, well integrity and safety were paramount to the planning process.
Choice was TRMAXX series safety valves
After a detailed review of the products and technologies available and a
rigorous evaluation of the service record of Schlumberger safety valves, the
operator selected the Schlumberger TRMAXX series surface-controlled subsurface
safety valves for these revenue-critical completions.
The TRMAXX valve series is the latest in a line of general service
products designed for reliable and cost-effective service. These compact,
modular valves are designed and tested for service in applications such as
those of this operators North Sea field. The TRMAXX series valves are
available with working pressure ratings to 68.95 MPa [10,000 psi] and a wide
range of materials for specific applications and operating environments.
Successful installations were continued worldwide
During 2006, more than thirty 4.5-in TRMAXX valves were run in the
operators North Sea field wells, and no installation or operational
anomalies were observed. Today these valves remain in place, performing as
designed. Since 2006, the operator has drilled 16 new wells in this field, and
all were completed using the TRMAXX safety valve systems. The operator
continues its use of these valves in North Sea completions at a rate of
approximately 25 systems per year and has begun using them in completions
throughout the world.