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The guidelines act as a guidance for equipment and tools that must be lowered to the template. If there was no tensioner and the platform moved, the guidelines would become slack and could be broken. For this reason a number of guideline tensioners are mounted between the platform and riser.
A hydraulic riser tensioner consists of a hydraulic cylinder with sheaves at both sides. The cylinder is connected to a number of high-pressure gas bottles via a medium separator. A wire rope is rigged in the cylinder; one end is connected to the fixed part of the tensioner, the other end is connected to the riser. [1]
Drilling riser joints with buoyancy modules. A drilling riser is a conduit that provides a temporary extension of a subsea oil well to a surface drilling facility. Drilling risers are categorised into two types: marine drilling risers used with subsea blowout preventer (BOP) and generally used by floating drilling vessels; and tie-back drilling risers used with a surface BOP and generally ...
[12] [13] The risers are typically 8-12 inches in diameter and operate at a pressure of 2000-5000 psi. [14] Designs beyond those ranges of pipe sizes and operating pressures are also feasible. Free hanging SCRs were first used by Shell on the Auger tension leg platform (TLP) [15] in 1994 which was moored in 872 m of water. [16]
Riser clamp for a standpipe through-penetration firestop inside a fire hose cabinet under construction. A riser clamp is a type of hardware used by mechanical building trades for pipe support in vertical runs of piping (risers) at each floor level. The devices are placed around the pipe, and integral fasteners are then tightened to clamp them ...
Used hydraulic lifters should be drained of oil before installation, to prevent them from holding open the valves on startup and potentially causing damage to the valve-train/pistons. This is easily accomplished by compressing them in a vise. Oil pressure will build quickly upon startup and they will set themselves to the proper height.
The company produces dynamic and static risers, static flowlines, subsea and topside jumpers, and expansion joints for use in the offshore oil and gas industry. The NKT flexible pipe is an unbonded structure consisting of helically wound metallic armour wires or tapes combined with concentric layers of polymers, textiles, fabric strips and ...
The number of instances the bolt shank can be reached by the feeler gage is then compared to either the results of a pre-installation verification procedure or the manufacturer's instructions. Applied Bolting Technology Products, LLC manufactures self-indicating DTIs, which are a subset of the standard DTIs described above.