Chapter Summary:

Field fix at midnight: With flow lost from an unmanned satellite platform, a small team uses a basket lift to a supply vessel, “Tarzan‑swings” aboard the dark platform, and troubleshoots by flashlight.
Pneumatic logic: Unmanned wellheads rely on gas‑powered (pneumatic) control panels to operate safety valves—no grid power required.
Root cause: A leaky ¼'' hydraulic line and a tired Haskel pump had dropped SSSV pressure. New fittings + pump restored the 2,100‑psi hold → wells reopened, flow hiss resumed.
Takeaway: Offshore reliability depends on simple, serviceable components and teams who can diagnose and fix them under pressure—literally and figuratively.

Additional Notes:

Sub surface safety valve: https://www.drillingmanual.com/subsurface-safety-valve-sssv/
Nice video explaining how the SSSV works and is controlled: https://youtu.be/8E4ERMfzslM
Haskel pumps: https://www.haskel.com/en/products/liquid-pumps/