Deep water WISON-APB CPT system for use in a drill pipe
The deep water WISON-APB wire line Cone Penetration Testing system comprises state-of-the-art technology and is well suited to operate in harsh offshore conditions. Its main components are a single multi purpose tool, a reinforced umbilical cable including fibre optics and an electric constant tensioning winch, allowing fast down hole operation. The system is modular in design, minimizing downtime with a reduced stock of spares. The deep water WISON-APB system is fully enclosed and does not affect the deep sea environment.
Multi purpose tool
The deep water thrust system is equipped with an easy click-on system, suitable for various in-situ investigation devices. Changing between Cone Penetration Testing and sampling can be done in minutes. The double acting stroke is adjustable in the range of 1 to 3 m. With a maximum force of 100 kN a constant penetration speed of 2 cm/sec can be maintained to comply with international Cone Penetration Testing standards. The tool is powered by its own battery pack. It has an automatic electro-mechanical system for locking itself in the bottom hole assembly. After a Cone Penetration Test the tool can be unlocked independently of the actual stroke reached. The deep water WISON-APB tool requires a drill string with an inner diameter of 4 ¼“ (109 mm) and a drill tower clearance of 11 m. The tool itself consists of several modules that can be easily replaced for maintenance or repair.
The tool is deployed from a aramid reinforced high strength umbilical cable. The umbilical provides continuous charging of the battery module in the tool, also during down hole lowering and lifting. It contains optical fibres for tool control and high speed communication of Cone Penetration Testing data.
Constant tensioning winch
The winch combines automatic compensation for heave and cable tension, providing a down hole speed which is constant relative to the drill string. This results in high speeds both up and down, reducing the overall tool deployment time. The winch has an automatic landing and recovery mode, which requires just one touch on the button to complete a full down hole journey with locking or a full return journey including tool recovery. The electric winch can store a maximum of 3.200 m umbilical cable and is driven by a frequency controller. The winch has a maximum speed of 5 m/sec.
The system is operated from two touch screens in the control room. The first screen is used to control the winch and the tool. The winch can also be operated on deck by a remote control. The second touch screen is used for real time data acquisition and includes the latest GOnsite! software.
More information is available in Leaflet S42.