CHUKAR WATERJET CASE HISTORY REPORT
A Successful Track Record of Completed Projects and Tests
July 2010 MC-252 Containment Project
The deepwater subsea skid including the Chukar Waterjet ultra high-pressure intensifier system was in the water, on-site, for approximately 32 hours total. During the period on-site the waterjet equipment skid went through four launch and recovery cycles and spent 27 hours at or near the well site, at 4,700 feet during three of these cycles. The ultra-high pressure intensifier was used on this water blasting project at various pressures for 11 hours.
The intensifier system operated well in salt water at depths up to 4,700 feet over a three day deployment period July 10 – July 13. No adverse effects were observed due to the use of salt water in the system, nor from the ambient ocean pressures that the system was subjected to.
June, 2012 – Simulated Cutting at Depth
Simulated cutting at depth – Cutting Head
The ability of Chukar WaterJet, Inc.’s water-jet cutting head to deliver abrasive in the subsea environment was verified by placing the subsea version of a Perm II water-jet cutting head in a hydrostatic pressure testing apparatus. The water-jet cutting head included a standard mixing chamber and a 0.045” nozzle and 0.015” orifice combination. While Ultra High Pressure (UHP) water was activated, the cutting head was subjected to hydrostatic pressures of up to 1000psi (2300ft of water). Proper operation at the abrasive inlet was measured via external connection.
Simulated cutting at depth – Abrasive Delivery via Abrasive Container
The ability of Chukar WateJet, Inc.’s abrasive container to control abrasive delivery to the cutting head in the subsea environment has been verified by subjecting the abrasive container to subsea pressures. Abrasive from the abrasive container was transferred to a Perm II water-jet cutting head via an abrasive delivery line. UHP water was activated to the cutting head and hydrostatic water pressure of up to 70 bar (700 msw) was applied to the abrasive container. Proper abrasive flow rate was measured.
July, 2012 – Shallow Water Test Cut – Inside Diameter cutting.
Demonstrated underwater cutting in a controlled test environment using an Inside diameter (ID) cutting tool. Successful underwater abrasivejet cut of 19 mm thick x 800 mm diameter pipe.
April, 2013 – Successful shallow water test cut in fresh water.
Chukar Waterjet’s Deepwater Subsea Skid was used to perform a successful test cut in Lake Superior. A diver-placed UHP waterjet pipe cutter was used to cut a 356 mm diameter, 12mm thick steel pipe, in less than 20 minutes.
August, 2013 – Delivered two subsea cutting systems to Royal Korean Navy.
Chukar Waterjet in partnership with sister company Jet Edge successfully delivered and verified diver operated subsea cutting equipment. SIT test video is available.
October, 2014 – Multi-string conductor cutting demonstration.
Successfully demonstrated waterjet cutting of a five conductor, 24 inch OD, cemented pipeline underwater and from the interior of the innermost (8-5/8”) pipe. The individual pipes were cemented to API 10 standards into the worst case configuration that might be found at an abandoned wellhead (see photos). Cut was completed in three and a half hours and with much less abrasive than is used by “abrasive saws”. Confidential test report is available for private review with customer.
November, 2014 – Concrete weight coating removal demonstration.
Successfully demonstrated concrete weight coating removal in hyperbaric chamber in an ambient environment corresponding to 700 msw. Results show effective removal of 55 mm thick wire reinforced concrete weight coating using Chukar Waterjet’s technique. Removal rate between 0 and 1.4 sq•m/hr is dependent on tool configuration and ambient pressure. Confidential test report is available for private review with customer.
February, 2015 – 3LPP coating removal demonstration.
Successfully demonstrated three layer polypropylene (3LPP) and concrete weight coating removal in hyperbaric chamber ambient environment corresponding to 700 msw. Results show removal of up to 28 mm of concrete in a single pass at ambient pressures correspondent to approximately 1,200 msw (140 bar). Test results give reason for high confidence that the Chukar Concrete Removal Tool would remove all the concrete and 3LPP under these conditions when incremented inwards on each subsequent pass to minimize standoff of the tool face from the work surface. Removal rate between 0 and 1.4 sq•m/hr for the weight coating, and between 0 and 0.25 sq•m/hr (projection) for the weight coating + 3LPP + protective epoxy, is dependent on tool configuration and ambient pressure. Confidential test report is available for private review with customer.
2015 – Active project for major oil and gas firm to supply deepwater subsea waterjet system.
Project includes successful delivery of customized equipment in support of customer-proprietary application, successful application and test of customized equipment at two pre-determined test levels, and engineering and build of major equipment order. All major milestones have been met and project is currently projected for on-time delivery.