Cost effective constant circulation system which can be used on the following projects;
- Conventional Overbalanced Drilling with hole problems
- Deep Water operations
- Extended Reach Drilling (ERD) long high angle/horizontal sections
- High Pressure, High Temperature wells (HPHT)
- Air and Foam Drilling
- Managed Pressure Drilling (MPD)
- Underbalanced Drilling (UBD)
Non Stop Driller© - HPHT and Deep Water Applications
- Eliminates downtime circulating out "connection gas"
- Eliminates deep/extended well bore "ballooning"
- Saves casing strings
- Provides fully rated kelly valves in drill string, can also be used as safety devices for well control
- Reduced swab and surge circulating in/out of hole
- Constant circulation reduces Bottom HoleTemperature
- Available for 6 5/8” drill pipe rated to 10,000psi
Non Stop Driller© - Enables Drilling Problem Wells
- Continuous ECD control and BHP while circulating
- Reduces risk of kicks on connections
- Reduces risk of losses post connection, no BHP spikes
- Place drill-in liners with tight clearance
- Reduced swab and surge circulating in/out of hole
- Enables operating within a narrow Pore Pressure/Fracture Gradient window
Non Stop Driller© - Improves Hole Conditions
- Improved hole cleaning
- continuous cuttings transport
- no cuttings slugs or drop out
- prevents cuttings beds
- no pack offs
- Constant BHP prevents hole collapse
- Significantly reduces stuck pipe incidents
- Improved ROP
- Even and constant drilling mud treatment cycling
- Ideal for ERD
Non Stop Driller© - UBD and MPD Applications
- Constant BHP on MPD / UBD connections
- Eliminates post connection stabilisation time multiphase drilling on air, foam and underbalanced wells (up to 90 minutes on some UBD wells!)
- Eliminates need to maintain increased surface pressure, to maintain BHP on connections and trips on MPD wells – so no Back Pressure Pump
- Reduces risk of overbalanced spikes on UBD wells
- Alternative to near surface float valves for UBD, air and foam drilling operations – allows full bore drill string access
- More accurate BHP control on MPD and UBD wells
The
Non Stop Driller© Sub consists of a Ball Valve and a custom designed high-pressure side entry Connection Valve.
- Fastest & simplest operational system on the market
- No hammer unions on Quick Connect, improved safety
- Design pressure is 10k psi (with 15k psi under development)
- Subs designed for 600gpm through Ball and Connection Valves
- Torque & tension capacity exceeds drill pipe rating
- NSD Valves easily removed and serviced without complex tooling
- NSD Connection Valve has double seals
- Secondary lock mechanism on Non Stop Driller© Connection Valve
