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Special Services:
Hot tap/ Subsea hot tap
Hot tapping is drilling a hole in a pipe or tube when no means of measuring or relieving the pressure contained within them are present. It is often used to gain access to wellbore when wellhead valves are rendered inoperable.
Cudd Well Control has designed and developed a unique hydraulic subsea hot tap which can be used in marine environments in water depths up to 300 feet.
 Subsea hot tap / valve drilling unit is the first of its kind ever built for subsea well intervention. This unit is remotely operated, reduces cost, operates safely and minimizes environmental concerns. It is designed and rated to work up to 10000 psi.
Gate valve drilling
Gate valve drilling is drilling out a malfunctioned gate or plug in the closed position while maintaining control over pressure below the gate or plug.
- Allows pressure to be released or pumped against
- Can drill gate or TIW valve to full ID
 Gate Valve drilling machine can be utilized to gain access to equipment under pressure. Pressure can then be monitored, bled off, or fluids can be pumped in to freeze or kill a well. They have a hydraulic or pneumatic drive for milling up valve gates and other jobs requiring additional time and effort. Units are available for up to 15,000 psi pressure ratings in H2S service. Gate valve units are pressure compensated, and can be used for longer reach operations, where the target to be drilled is several feet away from the unit.
Freezing
Freezing is a technique used to form a temporary ice plug across the ID or bore of tubulars or pressure control vessels, while under pressure. Freezing allows faulty equipment to be removed and replaced. CWC has performed cryogenic and dry ice freezing operations on a number wells, both onshore and offshore.
 Freeze equipment can be utilized to place a temporary pressure barrier in a wellbore or other conduit for removal of faulty equipment when other methods of pressure isolation are not available. In addition to conventional freeze services, CWC freeze equipment can be used for the cryogenic freeze technique for oilfield tubulars. The conventional freeze technique involve utilizing dry ice as a heat transfer medium, and is still used on trees, valves, BOP’s, and other non-cylindrical items. For tubulars of all sizes, the cryogenic freeze is faster, easier to maintain, and can freeze through multiple casing and cement layers.
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