CHOKE MANIFOLD

Content• Introduction

• The principal functions

• Choke manifold description

• Adjustable - Fixed chokes

• Common operation

• Different choke manifolds

• Choke manifold Specifications

• Maintenance and safety

IntroductionThe choke manifold is downstream of the flow head.

The main function:control the flow rate and pressure at the well head.

Principal functionsThe 5 points

Safety function: control of the well head pressure.

Allows different choke sizes: control the FLOWRATE.

Prevents water and gas coning: limitation of flow rate.

Prevents formation sand from entering the well: limitation of flow rate.

Ensure critical flow: the pressure fluctuations downstream of the choke manifold do not affect downhole pressure and flow rate of the well.

Choke Manifold Description

Four gates valves

A Fixed chokeAn Adjustable choke

Tapping points for measurement up and down stream choke

Thermometric well

Adjustable and Fixed chokes

Common operationChanging from Adj. choke to Fixed choke

Different choke manifoldsAccording to the:

• Working Pressure:

Choke manifolds are available in 5,000; 10,000; and 15,000 psi. The wide range

of choke manifolds available makes it possible to select a choke manifold that

accommodates the well tests required, while not being larger, more complicated,

or expensive than the overall project requires.

• Gate Valves:

The choke manifolds used by Schlumberger can be assembled with gate

valves from several different manufacturers: Malbranque, McEvoy, and WOM.

Choke manifold specifications

Safety and Maintenance• Safety

Always Open one valve before closing another.

Never flow through the manifold if the choke is not in place, threads will be eroded

by sand or/and corrosive fluids.

Do not use the adjustable choke to stop the flow, you can break the stem tip.

Use only brass and copper hammers to prevent sparks.

Always bleed off pressure using the bleed off port changing a choke.

Stay upwind when taking samples.

• Maintenance and referencesFOH II

Maintenance Manual

CHOKE MANIFOLD

The END