Enhancing Cementing Operations
SeaCure®, DeltaTek’s flagship technology, is a revolutionary subsea cementing system, which delivers stabbed-in, inner string cementing for subsea wells, eliminating the need for shoe tracks, improving cement placement, drill out performance and reducing the need for remedial cementing.
SeaCure® is a completely mechanical system with no electronics or hydraulics, making it a robust and reliable technique for optimising cement jobs and saving rig time. Thanks to funding from The Oil and Gas Technology Centre, DeltaTek completed successful trials both onshore and offshore, with the technology providing a range of major cost and time benefits to drilling and field development operations.
DeltaTek’s SeaCure® technology is saving rig time by reducing costs, risk and unproductive time. Advances in drilling technology are paving the way for unlocking challenging reservoirs and achieving the industry wide goal of maximising economic recovery. The focus on technology, collaboration and people are required to keep the industry moving forward – and DeltaTek aims to be at the forefront of that movement.
How does SeaCure® work?
Stabbed In, Inner-string cementing involves drill pipe being run inside the casing to be cemented and is generally considered to be a more efficient technique due to better control of cement displacement and fluid interfaces. The SeaCure® system takes this process to the next level and provides a range of major operational, cost and time benefits to drilling and field development operations.
A standard latch-in float shoe is run on the bottom of the casing or liner with no requirement for a float collar. Once the required casing length is run, the SeaCure® system, which has been racked back, is run inside the casing until the latch in adaptor lands in the shoe. Now the SeaCure® tool can be stroked partially closed to allow full rotation of the upper string and allow make up of the Casing Running Tool to the casing.
Once at cementing depth, cement is pumped into the casing annulus through the SeaCure® inner string. When the required slurry volume is pumped a drill pipe wiper dart is launched chased by a small amount of slurry followed by displacement fluid until the wiper dart locks into the shoe. The pressure is then increased to burst the rupture discs thus allowing the contents of the inner string and casing to be cleaned out through the running tool ball valve. Alternatively, the SeaCure® ball drop system is available to be used to execute the same process.
Casing pressure tests can be conducted immediately after this process and while the cement is still green which eliminates the risk of micro-annulus development. These tests are critical to ensure the integrity of the wellbore envelope.
With the casing tests completed as part of the cementing process, the inner string and SeaCure® tool can be recovered allowing the next section to be drilled with no cement plugs or shoe track to damage the bottom hole assembly (BHA) or drill bit.
SeaCure® Field Trial
Key SeaCure® Value
- Eliminates the shoetrack – reduction in drill-out time and associated risks
- Eliminates laminar fluid interface – reduced fluid contamination, enhanced set cement properties
- Provides efficient displacement – reduce displacement volumes, cement volumes, time and costs
- Assists in controlling excessive U-tubing or free-fall of the slurry helping to maintain fluid flow properties
- More aggressive slurry setting for shorter WOC
- Removal of remedial cementing techniques (e.g. TITUS)
- Zero reliance on wellhead tooling or cement port seals
- Improved drill out performance and minimised risk of cement block stuck BHA risk/BHA damage
- Internal chamfered float shoe to allow slim-hole drill ahead by maintaining a centralised BHA
- Cement Bond Log from the shoe