Tubing conveyed, reservoir control
The Welltec DHA Downhole Actuator is a robust, Bi-directional shifter, designed to be deployed on the tailpipe of upper or intermediate completions, to facilitate the mechanical opening / closing of Welltec large bore WFV (Welltec Flow Valve).
The DHA provides controlled access to multiple zones isolated during the safe deployment of upper / intermediate completion.
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Furthermore the DHA can be incorporated within applications that require periodical work-over, such as ESP or HSP type wells, for isolation of producing zones, via manipulation of WFV, to allow for work-over in a safe and stable well-bore environment.
The Welltec DHA will engage within the mandrel of the large bore WFV, and through application of set down weight will shift the WFV to open and via overpull will shift the WFV to close.
The Welltec DHA will then pass through, giving a confirmation load signature at surface.
| Applications |
| Multi zone open hole completions |
| ESP Producers |
| HSP Producers |
| Features |
| Debris tolerant design |
| Bi-directional |
| Emergency release |
| Full bore ID |
| Benefits |
| Multiple open/close capability |
| Robust life of well design |
| No reduction to production ID |
| Specifications | |
| Rigid OD | 5.79" |
| Key relaxed diameter, max | 6.37" |
| Key collapsed diameter, min | 5.79" |
| Minimum ID | 3.49" |
| ID drift diameter | 3.38" |
| Length | 89.31” |
| Max. operating temperature | 257°F |
| Tensile strength | 250 klbf |
| Compressive strength | 350 klbf |
| Quality grade | ISO 14998:2013 Q1 |
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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.