Press release August 2003

Improved scale control technology Offshore Europe 2003

For immediate release:

Cleansorb is pleased to announce that it will be exhibiting at the Offshore Europe Conference in Aberdeen, Scotland from 2^nd  - 5^th September 2003, located on the European Commission stand number 1567 which highlights technologies under development.

Cleansorb will be presenting its proprietary enzyme based process for depositing scale inhibitor chemicals in the near wellbore formation.  “Precipitation Squeeze Treatments” of this type have proved very successfully in relatively hot formations by increasing the quantity of inhibitor placed downhole by each treatment.  This enables wells to be flowed longer before re-treatment is required with significant savings in treatment costs and reduced production downtime.

Cleansorb’s technology will enable technically superior precipitation squeeze treatments to be applied in cool formations, which has not been possible to date.  Following initial development in Cleansorb’s labs, core flood tests by Clariant Oil Services are being used to optimise treatment procedures.  Results to date are very encouraging and field tests are expected to take place in the near future.

Cleansorb would be pleased to discuss the above in more detail with visitors to the stand.

For further information contact:

Dr Ralph Harris or Dr. Ian McKay

Cleansorb Ltd, Surrey Technology Centre , 40 Occam Road, Surrey Research Park, Guildford, Surrey GU2 7YG, U.K. 

Tel. ++44 (0)1483 295090  

Fax. ++44 (0)1483 845358 

Notes for editors:

1. In-situ deposition of materials has been developed by Cleansorb Limited, based at the Surrey Research Park in Guildford, Surrey, UK. The process combines enzymes (biological catalysts) with suitable chemicals to achieve the deposition of solid materials from an initially particle free fluid.

2. The controlled deposition of scale inhibitor chemicals within the formation increases the amount of inhibitor placed downhole by each treatment and allows wells to be produced for longer before re-treatment is necessary.  These precipitation squeeze treatments are regarded as technically superior to conventional adsorption squeeze treatments.   

3. The chemical and biochemical components used to deposit the scale inhibitors are  environmentally friendly and very low hazard. 

4. A catalyst is a compound which promotes (speeds up) a chemical reaction without itself being consumed by the reaction.  The catalysts used in Cleansorb’s deposition processes are enzymes.  Enzymes are chemical compounds found in nature.  They are, however, single chemical compounds which can be manufactured to the usual standards of purity of industrial chemicals.

5. Although Cleansorb’s deposition technology is a biotechnological process it should be clearly distinguished from oilfield well treatments based on bacteria.  Using enzymes confers many advantages including a high level of process control, high yield and better thermotolerance.  Enzyme based systems are also particulate free.

6. Cleansorb Limited, based at the Surrey Research Park, Guildford, Surrey, UK, is a privately owned biotechnology company which specializes in developing catalyst-based processes which assist oil and gas production. Contact:  Ralph Harris or Ian McKay,

Tel. ++44 (0) 1483 295090 Fax. ++44 (0) 1483 845358.

7. In addition to deposition technology Cleansorb offers other catalyst-based processes with applications in oil and gas production.   Cleansorb’s Arcasolve^TM acidizing process is already being successfully used in the oilfield by independent and major multinational oil companies. 

© Cleansorb Limited 2006.  All rights reserved.