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Drill pipe (#16) is a joint of hollow tubing used to connect the surface equipment to the bottom hole assembly (BHA) and acts as a conduit for the drilling fluid. In the diagram, these are stands of drill pipe which are 2 or 3 joints of drill pipe connected and stood in the derrick vertically, usually to save time while tripping pipe.
It is a circular concrete gravity structure, 140 m in diameter at its base, with seven concentric walls of stepped heights intersected by radial walls at 45-degree angles. A 14 m wide central shaft is surrounded by a breakwater wall ("Jarlan Wall") 45 m in diameter and 1.6 m thick pierced with 1.5 m diameter holes.
The mousehole of a drill rig. The mousehole is the storage area on a drilling rig where the next joint of drilling pipe is held until needed. This hole is in the floor of the rig, bored into the earth for a short way, and usually lined with a metal casing known as a scabbard.
Last October, an Idaho farmer using a backhoe punched a hole into a 22-inch (56-cm) pipeline buried under a field, sending more than 51 million cubic feet of natural gas hissing into the air.
It was on a platform high up in the trees opposite a dip in the road between the two old telegraph poles. My recollection is that the tank was as high as the telegraph poles. A vertical pipe from the tank was connected to a horizontal pipe fixed to the top of the wall. This pipe had a line of small holes along its length.
The concrete is poured in to form the base with slopes from the precast concrete wall down to the half point of the existing pipe. This forms a half bench for the manhole base. The top half of that existing pipe is cut open to form a channel. A new pipe is inserted through the wall hole.
The corrosion rate of copper in most drinkable waters is less than 2.5 μm/year, at this rate a 15 mm tube with a wall thickness of 0.7 mm would last for about 280 years. In some soft waters the general corrosion rate may increase to 12.5 μm/year, but even at this rate it would take over 50 years to perforate the same tube.
The holes were found as NOAA explored a submerged mountain range. ... An organized series of holes punched in the floor of the Atlantic Ocean. The discovery was made Saturday, July 23, and photos ...