Underwater Drilling TRIZ Cases

A serrated tail pipe is rotated into the seabed before drilling to limit washout, support conductor casing cementing, and reduce cuttings loss.

Segmented fluid circulation maintains overbalanced pressure below the blowout preventer stack, preventing gas influx during deep water operations.

Modular subsea fluid distributor segments hydraulic distribution to reduce structural complexity while enabling flexible well connections.

Internal bore hard coatings resist erosion and cavitation damage from fluid particles, extending subsea valve service life.

Hydraulic ratchet mechanism aligns subsea structures with damaged wellheads, eliminating complex underwater manual operations.

Embedded pipes in suction foundations stabilize subsea wellheads, eliminating conductor casings to reduce seabed washouts and installation labor.

A tree cap wedge seal system uses a cam element to compress an annular metal seal against a bore.

Multiphase flow meters provide real-time data to automatically adjust choke valve positions.

Reverse circulation via the drill string removes heavy riser tubulars, reducing fluid volume requirements and lowering construction costs.

Hydraulic pressure expands a split lock ring via a wedge piston, enabling remote engagement and disengagement without plastic deformation.

Mixing low-density lifting fluid with drilling returns reduces return mixture density, resolving dual gradient instability in deep water wells.

Segmented valve element cuts tubing while sealing passageway to prevent discharge during well shutdown.

Water-soluble phosphate esters and sulfide compounds reduce seawater corrosion and bioaccumulation in blowout preventer devices.

Shape charges replace mechanical rams to sever high-strength pipes, resolving reliability issues caused by insufficient accumulator pressure.

Removing the marine riser eliminates wellhead bending stress while flexible hoses maintain reliable fluid management and prevent seawater pollution.

Water-based drilling fluid formulation maintains constant rheological properties across 4-65°C, preventing reservoir damage and hydrate blockage.