Oilfield & pressure control

Rig-site hose replacement in Abu Dhabi and Al Dhafra: planning around the permit

On a drilling rig the hose work is the easy part. Access, permits and certification are what set the clock — and all three can be shortened before anything fails.

API 7K rotary and vibrator hose: coupling type, sour service and safety clamps

Same 5,000 psi rating, three different coupling methods, and one accessory that is not optional. What separates the constructions, and what changes for high-temperature and sour wells.

BOP control hose: why fire survival is half the specification

An API 16D control hose is rated on pressure like anything else — and then on something most hose never has to do: keep working inside a fire for long enough to shut the well in.

API 16C choke and kill lines: liner, temperature and the 1.5:1 problem

A choke and kill line runs closer to its burst pressure than almost anything else on a rig. What sets the temperature ceiling, why the liner is the decision, and what that margin means for handling.

API 7K, 16C and 16D: which standard governs which hose on a rig

Three API specifications cover three different jobs, and they do not share a design factor. What each one governs, and why a 16C line at 10,000 psi has less margin than a hydraulic hose at 400 bar.