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NewBarrier valve
Reservoir Isolation Tool (RIT)
A bidirectional ball valve system which can hold pressure from above and below. The RIT can be opened remotely by user-defined pressure cycles, and it can independently be opened and closed with a matching shifting tool.
| Type | Bidirectional ball-valve barrier |
|---|---|
| Qualification | Meets and exceeds API 19V / ISO 28781 V3 |
| Remote opening | User-defined tubing pressure cycles |
| Mechanical operation | Open and close with a shifting tool, multiple times |
| OD / ID | 8.00 in. (203.2 mm) / 4.50 in. (114.3 mm) |
| Temperature rating | 350 °F (177 °C) |
Overview
The Reservoir Isolation Tool (RIT) is a bidirectional ball valve system which can hold pressure from above and below. The RIT can be opened remotely by user-defined cycles, and it can independently be opened and closed via a matching shifting tool.
The RIT is a bidirectional barrier valve used in oil and gas wells to isolate reservoir fluids in the lower completion. It features a sealing ball design providing a higher differential pressure rating compared to flapper-type fluid loss prevention devices. It meets and exceeds API 19V / ISO 28781 V3 standards, making it suitable for various applications, including intelligent, multizone, gravel-pack, frac-pack, stand-alone screen completions, as well as suspension and temporary abandonment of wells in challenging environments like deepwater and underbalanced perforating.
The valve’s opening and closing mechanisms are notable. It employs a customizable one-time remote-opening mechanism, eliminating the need for intervention to open the valve. Tubing pressure cycles are applied to trigger the opening mechanism, allowing testing of various components before reconnecting with the reservoir.
Additionally, the RIT can be opened and closed mechanically multiple times using a shifting tool, before or after the remote actuation, which can be run at the end of a washpipe, perforating string, or coiled tubing. The shifting tool engages the valve’s shifting profile to open or close the ball valve.
Technical specifications
| Outside diameter | 8.00 in. (203.2 mm) |
|---|---|
| Inside diameter | 4.50 in. (114.3 mm) |
| Overall length | 242.90 in. (6.17 m) |
| Material | 13Cr 80 ksi |
| Max tensile load | 530 000 lbf |
| Max burst pressure | 6500 psi (45 MPa) |
| Max collapse pressure | 6500 psi (45 MPa) |
| Qualifications | ISO 28781:2010 or API Spec 19V |
| Temperature rating | 350 °F (177 °C) |
Inside the RIT
Six key mechanisms
Select a mechanism to see it in the cut-away render.
Meets and exceeds API 19V / ISO 28781 V3
Mechanisms
Features
How the RIT works
Eight features of the opening, closing and debris-management system.
- 01
Configurable counting mechanism
Operates with tubing pressure cycles to initiate remote opening of the ball valve assembly. System operates consistently, independent of TVD as the system is balanced with annulus pressure. The counter is initiated by the first high pressure cycle, which is set with an externally replaceable rupture disk, ensuring internals stay clean and debris free until the initiation sequence commences.
- 02
High force remote actuation
High force actuator opens the ball valve utilizing annulus hydrostatic pressure. Connected in-line with an integral hydraulic dampening unit, force is delivered in a controlled state so as not to damage internal components due to otherwise high inertia values.
- 03
Collet profile sleeve
High debris tolerant design. Full drift profile works in conjunction with the collet shifting tool to ensure consistent latching and releases. Built-in permanent profile ensures a secondary method of manipulating the sleeve if dynamic profiles become damaged.
- 04
Pressure differential compensated ball valve
Ball valve features a balancing double piston design which increases sealing force if pressure is higher from above or below the ball.
- 05
Remote actuation defeat system
Once the remote activation has completed the opening process, continued motion through this mechanism releases the engagement from the actuating assembly. This ensures that closing the valve post remote opening is as easy as initial open and close cycles.
- 06
Special disconnect mechanism
After remote opening of the RIT there is a special mechanism that disconnects the manual shifting sleeve from the remote actuator. This allows the valve to be further manually operated after the remote shift.
- 07
Superior debris management
Throughout the RIT assembly, state of the art debris relief designed components ensure a highly reliable and smooth-running system in the worst possible environments.
- 08
Adjustable pressure cycle system
The adjustable cycle system provides the customer customizable remote pressure operated cycles for each Reservoir Isolation Tool.
Applications
Where the RIT is used
Intelligent, multizone, gravel-pack, frac-pack and stand-alone screen completions; suspension and temporary abandonment; deepwater and underbalanced perforating.
Production
Injection
Zonal isolation
Gravel pack
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