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A new solution to an old problem Introduction

A recent evolution in artificial lift utilizes concentric coiledtubing and jet pump technology for gas well dewatering

operations. The implications of this novel adaptation arequite significant.

In the AquaLift™ Gas Well Dewatering System (patent

pending), the inner coiled tubing string is used to power adownhole jet pump, returning produced wellbore fluids andpower fluid up a concentric coiled tubing annulus through

to the surface production equipment. This system allowsfor consistent draw-down of the reservoir. Benefits include

"Dry Gas" flow performance and production characteristics.

 Background

Jet pumps are a proven technology used in various well

configurations to artificially lift liquids from under-pressuredreservoirs. The principals are quite simple. Based on a

venturi effect, system fluid pressure is converted into ahigh-energy jet stream, creating low pressure at the pump

intake. Subsequently, the flow enters a profiled diffusersection which converts the jet kinetic energy into pressurewhich is harnessed to drive fluid to surface.

Taking this technology one step further, the AquaLift

process combines a miniature jet pump with concentriccoiled tubing which is run in gas wells. The well can then flow gas up the annulus between the AquaLift

string and the completion (which is not liquid-loaded).

AquaLiftTM SystemProduct Sales Bulletin

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B J S E R V I C E S C O M P A N Y  

The above features and/or data are supplied solely for informational purposes and BJ Services Company makes no guarantees or warranties, either expressed or implied, with respect to their accuracy or use. All

product warranties and guarantees shall be governed by the BJ Services Company standard at the time of sale or delivery of service. Actual product performance or availability depends on the timing and locationof the job, the type of job and the particular characteristics of each job. This document is controlled by the reference date. To ensure that this is the current version, please reference the Services section of the BJServices Website (www.bjservices.com) or ask your BJ representative.

April 17, 2006

AquaLiftTM SystemProduct Sales Bulletin

 Systems Features

A typical AquaLift system features the following:  1" x 1.75" - Concentric Coiled Tubing (CCT)

completion string• 1.75" AquaLift pump with surface-retrievable

carrier assembly• 30 or 60 HP surface pump package• level-controlled fluid separation and supply system• dual-string wellhead hanger• performance optimization via proprietary software

 Production Benefits

The AquaLift system provides a number ofsignificant benefits that greatly improve gas

well production. These include:

1. Remove liquid load in gas productionflow stream:• Eliminate hydrostatic suppression,

slugging and production killing• Eliminate choking effects of

velocity strings• Higher draw down• "Nearly-dry" gas flow

2. De-water "frac wings"

3. Significantly increase recoverable reserves

AquaLift™ Jet Pump 

Carrier Assembly 

AquaLift™ Design and Optimization Software 

AquaDrive Surface Pump Package