Selective rotary valve (RSV) and multi-phase flowmeter (MPFM)

RSV was developed in the early 1900s for use in irrigation systems. In the late 1940s, the product gained traction in the growing oil and gas industry throughout Texas and California. The purpose of this unit was to manipulate multiple wells in a group flow line to feed restraining vessels or various production facilities and to maintain the ability to test wells or specific resources on a command-line basis.

Today, RSV is widely used throughout the oil and gas industry in addition to chemical applications, refineries, water purifiers, pulp and paper, cementing, food production, and general industries.

Rotary selector valve components (RSV-Figure 1):

• RSV Actuator
• Heat Shield
• Riser Kit
• Thermal Coil
• Thermal Blanket
• Mounting Brackets
• Lifting Pads

Application:

Multi-port valve can be used for liquid or gas systems:

• Multi-port flow
• Single port test
• Manual or automatic operation
• Water injection
• Collected in the tank battery
• Another application

The RSV supports the ability to bypass multiple input ports, allowing each port to flow uninterruptedly into a single chamber called the valve body and exit through a group output port. A rotor shaft located in the center of the bowl allows a single inlet source to be selected to deflect the 1.2 or 1.5-dimensional flow line through one elbow and exit through a test outlet port.

The position of the valve is controlled by manual or automatic operation. Manual operation requires placing the index wrench directly on the outer stem of the rotor and rotating to the selected position. Automatic operation uses a hydraulic, pneumatic or electric controller that attaches directly to the outer stem of the rotor.

Action:

The RSV can be operated clockwise or counterclockwise.

As the rotor passes through each port, a spring-loaded wiper engages the sealing surface of the valve body. This creates a self-cleaning action and removes accumulated debris that may limit proper operation. It also increases the life of the port seal and the valve body.

Adjustable carbon Teflon port seal and spring act as a soft seal that prevents leakage in the test line and connection of the valve body. The back rings on the port seal are designed to accommodate extra pressure, higher temperatures or the presence of chemicals.

Two-way rotation

• Self cleaning
• Self-sealing
• Adjustable sealing surface
• Backup loops improve performance life
• Improved and revised metallurgy for longer life and advanced product performance
• Improved elastomers and seat design to meet today’s standards and applications

Port selection and flow:

 

Port Seal can be adjusted with a specially designed tool. This tool has two retractable spring bases that engage and separate through a pistol grip trigger. Each pin is placed in a slot on either side of the adjusting nut.

O-Rings prevent external leakage through the body or valve head.

Emergency shutdown facilities; Close upstream ports individually or in groups.

The downstream control valve can be connected remotely and automatically to the upstream adjustment point according to the user’s needs. The control system can work locally or remotely.

Optional quick cut-off connections on all inlet / outlet flanges allow easy slip separation or displacement.

Special coverages for offshore or extreme conditions.

Design criteria:

• ASME B16.34 (American Society of Mechanical Engineers)
• ASME Section 8, Section 1 / Section 2 (FCI – Fluid Control Institute)
• ASME B16.5 (FCC-Fluid Cracking Catalytic Cracking)
• NACE MR 0175 / ISO 15156 (National Association of Corrosion Engineers)
• API 598 (American Petroleum Institute)
• ANSI / FCI 70-2-2006 (American National Standards Institute)
• MSS SP-55 (Manufacturers Standardization Association)
• FEA analysis, appropriate safety factors, industry / local code requirements
• Design Criteria Part 1 ASME VIII

ANSYS finite element analysis software was used for the main components of the RSV. Working and testing conditions are analyzed and usage factors (safety factors) are approved to encrypt the permitted items.

The standard approach is to use ASME VIII Part 1 design criteria and always use the casting quality factor unless the design is unique, limited in quantity, and customized for specific applications.

Due to metallurgy, flow, pipeline characteristics, valve size, pressure classes, seals, differentials, controllers, communication protocols, serviceability, measurement capabilities, and leak prevention, RSV improvement continues.

In addition, we have the task of ensuring that each design supports ergonomic performance, safety, simple integration, and environmental protection against leakage, such as H²S liquids or gases.

Simple design – 3 main parts:

Skate design:

Based on the results of the analysis performed using FEA, the sledge meets AISC requirements with a safety factor greater than 1.5 for all loading conditions and a safety factor greater than 3 for Lifting Eyes.

The multi-port modular skid system uses a simple design that saves time, money and human resources. This system includes the ability to extend fast connectivity for future field growth or rapid disconnection to transfer those resources to other areas for better use.

New designs based on customer needs:

• ANSI CL 1500 – 2500
• SAG-D – Extreme temperature
• Full body alloy
• Custom Skid – GA / Design

 

SKIDS RSV with a single flow meter:

Multiphase flow meter:

Continuous Multiphase Flowmeter (MPFM) uses technology to measure continuous flow. Conventional multi-phase flowmeter works well in both oil and dry gas environments and allows monitoring and testing of dry gas, condensate and oil wells with one meter.

Through a multi-phase multi-phase data link, users can verify well data, perform quality control, generate well test reports, analyze well data, detect production, and Interpret tank distances. Eliminating the need for separators and associated systems or support controls, the system is ideal for onshore and offshore applications, satellites or unmanned spacecraft, including underwater installations.

As the need for a separator is eliminated, the need for space, load and maintenance is reduced. Continuous and highly accurate flow rate measurements enable faster response times to production anomalies. A typical MPFM has limited or no moving parts and is essentially maintenance free. Remote monitoring increases the safety of field personnel and enables better use of human resources.

Flow features:

The RSV can be operated clockwise or counterclockwise.
As the rotor passes through each port, a spring-loaded wiper engages the sealing surface of the valve body. This creates a self-cleaning action and removes accumulated debris that may limit proper operation. It also increases the life of the port seal and the valve body.
Adjustable carbon Teflon port seal and spring act as a soft seal that prevents leakage in the test line and connection of the valve body. The back rings on the port seal are designed to accommodate extra pressure, higher temperatures or the presence of chemicals.

Result:

RSV Multiport Skid offers a simple and cost-effective solution for manifold fluids in low maintenance and environmentally friendly packaging. Intensive design reduces capital costs and allows better use of resources at the required time and place. The latest data communication technologies provide continuous feedback to help maintain a high level of operational efficiency and ensure a faster response time to production anomalies.

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