AT A GLANCE
Where: Latin America
When: 2018
Scope: SprayCementing in large section milled window using HydraHemera™
Reduced operational risk and seceral days of rig-time saved
CLIENT CHALLENGE
The well in question was scheduled for Permanent Plug & Abandonment (PP&A), and the client was facing some huge challenges including pressures from the reservoir migrating through multiple casing strings.
The cap rock where the abandonment plugs had to be placed was adjacent to both the 9-5/8" production casing and the 13-3/8" surface casing. Due to well complexities, section milling was planned in the two casing strings which resulted in a rather large annulus (24" open hole) due to section milling operations.
Hydrawell proposed our HydraHemera™ SprayCementing Valve to jet cement with high energy out to the under-reamed window in order to secure a proper placement of cement.
BACKGROUND
The Operator reached out to HydraWell due to our proven track record and ability to demonstrate out-of-the-box thinking when it comes to well integrity solutions. As innovators and passionate problem solvers, HydraWell previously supported the Operator’s affiliate in Norway to deliver an extensive decommissioning campaign in the North Sea.
This time, we were presented with one of the Operator’s largest projects that year, and only top performance, in depth experience, superior solutions and full commitment to the project would be accepted.
HYDRAWELL SOLUTION
wasdeployed on a 5" work string. After an initial circulation of bottoms up, spacer and cement were displaced down the work string, and the SprayCement Valve was pulled and rotated through the section milled window (Fig. 1-3). Cement was exiting from the nozzles with high energy from bottom to top of the section milled window displacing the wellbore fluids and leaving an uniform and homogenous rock-to-rock cement plug (Fig. 4).
RESULTS & BENEFITS
Using the HydraHemera™ SprayCement Valve limits the contamination of cement with existing wellbore fluids and secures a homogenous and uniform cement plug in the whole cross-section.
This solution meant the Operator did not have the same risk of cement contamination as with conventional balanced cement plugs in a (large) section milled window. The likely time savings is approximately seven days compared with conventional methods where the innermost casing is cut and pulled with only the outer casing section milled.
