Dimple Tool (ShiftLoK)
The Well Key® Dimple Tool is designed to permanently lock open surface-controlled subsurface safety valves (SCSSVs) in a single run.
With pinpoint accuracy, it deforms the sleeve by making “dimples” in its surface, securing the sleeve in a fixed open position. Active hydraulic control and a high expansion ratio ensure full integrity of downhole jewelry and reduced risk, as the tool is only opened once it reaches target depth.
As an added option, the ShiftLoK configuration integrates a mechanical shifting feature, enabling operators to shift the flow tube and then dimple it in a single run – providing a reliable solution even when valves are mechanically inoperable.
Featured case
A critical well barrier issue in the North Sea prompted the rapid development of a hybrid ShiftLoK solution. Within just 10 days, Welltec designed, tested, and deployed the tool to shift, dimple, and lock open an inoperable DHSV in a single run. Together with cable recovery, the operation restored well access and re-established integrity for continued intervention.
| Applications |
| Locking SCSSSV sleeves in position via flow tube deformation |
| Downhole hardware |
| Features |
| Applies high, controllable force directly to the target |
| Surface-controlled dimpling with real-time monitoring via SRO2 |
| High expansion ratio for broad ID compatibility |
| NACE compliant materials |
| Rugged design for repeated actuations |
| Benefits |
| Precise and reliable sleeve locking |
| Fewer runs, reducing time and operational costs |
| Minimized risk of damage to well hardware |
| No jarring required, improving safety and control |
| Custom-designed for specific valves |
| Operates on any e-line via DC |
| Specification range* | |
| Length | 9 ft → 12 ft |
| Running OD nominal | 2 1/8” → 3 2/5” |
| Weight in air | 62 lbs → 220 lbs |
| Completion ID | 2.4” → 6.2” |
| Max. well pressure | 20,000 psi → 25,000 psi |
| Max. well temperature | 302°F |
| Tensile strength | 30,000 lbs → 45,000 lbs |
| Compressive strength | 30,000 lbs → 50,000 lbs |
| * | Dependent upon configuration |
Talk to your local expert
At Welltec, our team of specialists is experienced in resolving the unique challenges of well drilling and operations across diverse terrain. Whatever your need, we can help you find a solution.