For multiple zones completions
The Welltec Isolation Valve (WIV) design, when incorporated to lower completions or liners, enables circulation & wash down or annulus fluid displacement during deployment and provides bi-directional sealing for permanent lower completion or liner isolation upon closure.
To close the WIV, a ball is dropped from surface and circulated down, generating a differential pressure to shift the sleeve and create a permanent bi-directional seal, such that WAB / WLP can be hydraulically expanded. The sleeve is locked in the closed position and can be milled out if required.
Product name: WIV (Welltec Isolation Valve).
Product structure: ball-drop activated, bi-directional seal
Base casing: compatibility with all standard casing material / weight / threads
Metallurgy: 4140 / S13 Cr / 25 Cr / Inc 718 / 925
Primary seal type: o-ring
Standard elastomers & seals: HNBR (160°C) / Aflas (200°C) / FFKM (260°C)
| Applications |
| Liner Installation that incorporate WAB / WLP or alternate hydraulically actuated technology |
| Multi-zone one open hole completions |
| Inner string valve for cased and open hole applications |
| Forming the upper and lower seal assemblies for casings, liners or liners |
| Features |
| High differential pressure rating with bi-directional sealing |
| Low diametrical profile, minimal running OD |
| Provides safe and cost-effective sealing |
| Corrosion resistant alloy are available for hostile environments |
| No impact on casing tensile, torque specifications |
| High circulation rate option while RIH |
| Heavy-duty design |
| Benefits |
| Allows for fluid circulation and high rate wash down / displacement during deployment of lower completion / liner |
| Fully balanced, permanent, bi – directional sealing mechanism |
| Specifications | |
| Base pipe size | 4 1/2" |
| Max. burst pressure | 10,000 psi |
| Max. collapse pressure | 10,000 psi |
| Shear pin arrangement | Up to 4 pins |
| Max. OD | 5" |
| Min. ID | 1.98" |
| Flow area | 1.49 sq. in |
| Ball OD | 1.50" |
| ISO14310 Standard | V3 |