Data Sheet | TC9814-003

MOZLEY™ Wellhead DesanderProven efficient separation systemsMOZLEY Wellhead Desanders are used to remove sand and other solid particles from multi-phase wellstreams of the wellhead choke. The units can be used as a permanently installed facility or as a temporary well service tool.

Overview

MOZLEY Wellhead Desanders are utilized at the production wellhead and

consist of single or multiple cyclone inserts housed inside a vessel operating

at the appropriate wellhead design pressure. These efficient units protect

downstream equipment from mechanical damage and erosion. They also

prevent partial blocking and settlement of sand in separators that lead to a

reduction in capacity.

Operating Principle and Key Features

MOZLEY Wellhead Desanders typically consist of single or multiple cyclone

inserts housed inside a vessel. The cyclone inserts are specifically designed for

each application using our proprietary computer simulations. Wellstream fluids

enter the cyclone tangential inlet, which forces the mixture to spin, and causes

the gas to disengage quickly. Both gas and liquids migrate toward the center

of the cyclone, as a reduction in cyclone diameter accelerates the fluid while at

the same time generating strong centrifugal forces.

The gas and liquid flow then reverses and moves upward towards the

overflow vortex finder. Solids are separated from the gas and liquid, forced

towards the cyclone wall and travel down the length of the conical section

of the cyclone in a spiral pattern towards the solids outlet. The separated

solids fall through into the accumulator vessel situated on the underflow of

the wellhead desander or a continuous hydrotransport device can be utilized.

The accumulator vessel is periodically isolated and collected solids are flushed

out. The wellhead desander itself remains on-line and operating while the

accumulator is being cleaned.

Performance

Depending on solids particle size distribution and wellstream properties,

up to 99% by weight solids removal is achieved on typical wellhead sand size

distributions. Pressure drops are only in the range of 5 to 150 PSIG (0.35 Kg/cm2

to 10.5 Kg/cm2).

Product Range

• Up to 30-inch (762 mm) diameter cyclone inserts available as standard with

larger sizes available if required

• Liquid capacity up to 50,000 BPD (7950 m3/day) per wellhead desander

• Optional geometry for a range of gas void/volume fractions in oil and gas

wells

• Housing designs up to 15,000 PSIG (1055 Kg/cm2)

• Hydrocyclone insert materials available in stainless, duplex, super duplex

steels, a range of ceramics and tungsten carbide

PROCESSSYSTEMS

S O L I D S

© 2010 Cameron | MOZLEY is a trademark of Cameron | Printed in USA, 1M | 07/10 TC9814-003

PROCESSSYSTEMS

Benefits and Advantages

Proven reliable experience over many years

with units operating worldwide in a wide

variety of applications.

• Significant capital and operating cost

savings

• Allows increased flowrates from wells that

are choked back due to sand production

• Avoid wellhead choke and manifold erosion,

significantly reducing changeout frequency

• Avoid erosion, solids build-up and blockage

in downstream process equipment

• Avoid need of highly erosive vessel sand-

jetting systems

• Removal of clean sand prior to oil

contamination in separators

Options and Types

• Upstream or downstream of the choke

Installation Examples

• Offshore - Shell Brent, UK - High sand

producing wells

• Offshore - BP Marlin - GOM

• Onshore - Maersk, Harald West, Denmark

Applications

• High sand production wells

• Coiled tubing clean-out

• Solids removal for produced water

re-injection

• Underbalanced drilling cuttings removal

• Increased flow rates from sand “constrained”

wells

• Re-start production from sand plugged wells

LOCATIONS

United States of America

11210 Equity Dr., Suite 100

Houston, TX 77041 USA

TEL +713.849.7500

United Kingdom

Cameron House

61-73 Staines Road West

Sunbury-on-Thames

Middlesex, UK TW16 7AH

TEL +44.1932.732000

Singapore

2 Gul Circle (Gate 2)

Jurong, Singapore 629560

TEL +65.6861.3355

OTHERLOCATIONS

Abu Dhabi

Australia

Brazil

Calgary

Colombia

France

Japan

Mexico

Saudi Arabia

Russia

www.c-a-m.com

Wellhead Desander Diagram