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The PIRANHA Dissolvable Cement Retainer is a dissolvable isolation tool developed by Vertechs for squeeze cementing, remedial cementing, well integrity restoration, and plug-and-abandonment (P&A) applications. Constructed from high-strength dissolvable materials and a fast-drillable mandrel, the tool enables setting, pressure testing and cementing squeezing operations in a single run, delivering efficient and reliable downhole isolation.
Once set, the tool provides dependable bidirectional pressure integrity and supports tubing pressure testing to verify system integrity prior to cement placement, enhancing operational safety and treatment reliability. After drill-out, the remains and the majority of the cuttings will dissolve in the wellbore environment, significantly reducing intervention costs while accelerating well return-to-production.
Features
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5,000 psi differential pressure rating
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Suitable for low temperature application at 104℉ (40℃) and high temperature up to 302℉ (150℃)
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One-trip setting and squeezing
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Bidirectional pressure holding after setting
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Allows tubing pressure test before squeezing
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Dissolvable packing elements
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Customizable ROD (Rate of Dissolution)
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Setting with special wireline/hydraulic setting tools
Specification
| Casing Size in. [mm] | Casing Weight lb/ft | Casing ID in. [mm] |
| 4.5 [114.3] | 12.6 | 3.96 [100.5] |
| Tool OD in. [mm] | Tool ID in. [mm] | Length in. [mm] |
| 3.35 [85] | 1.02 [26] | 16.73 [425] |
| Pressure Rating psi [MPa] | Temp Rating ℉ [℃] | Stinger OD in. [mm] |
| 5000 [35] | 104-302 [40-150] | 1 [25.4] |
| *Special customizable designs available upon request | ||
Case Study
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BACKGROUND
In a North Europe field, three water producing zones were successfully treated with one-trip dissolvable cement retainers and dissolvable plugs. By setting a Chameleon Dissolvable Plug below the problem zone and thereafter setting the PIRANHA Dissolvable Cement Retainer above, cement slurry was squeezed and sealed. Mill-out operation quickly cleaned out the wellbore with minimal debris from the cement retainers and plugs.
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CHALLENGES
Tubing ID 3.958” with 3.688” downhole restriction requires cement retainer to be customized with smaller OD and longer setting range
Debris left in hole after mill-out if setting traditional cement retainer and plug
High risk of clogging the well if non-dissolvable plug parts left downhole
Low temperature (125℉) and low salinity (KCl 450ppm) will impair dissolvability of dissolvable tools
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SOLUTION
PIRANHA Dissolvable Cement Retainer and Chameleon Dissolvable Plug with 3.5” OD to set in 3.958” tubing ID
Customized dissolvable metal & elastomer for low temperature;
No tubing clogging risk after dissolving
One-trip dissolvable cement retainer reducing overall treating time and cost for one more CTU run
