What is the drill?
Drill collar is a device used in drilling oil wells to weigh the drilling bite, allowing it to drill through the rock. It is a rod made of solid steel, either ordinary carbon steel or non -magnetic steel alloy, drilled longitudinally to allow drilling fluids. The drill collar is the lowest element of the drill chain, which includes all elements of the lower opening process from the surface to the rock bit.
These devices are usually 31 feet (about 9.45 m) long and thread at both ends, males at one end and women on the other to attach more drill collar above the bit assembly. The number of drills connected to the drill chain will depend on the composition of the layer material at the drill site and the probable depth of the well. A relatively shallow well with a less dense geological structure, through which a bit must go through the length of length, but may vary on average and their external configuration can be neat or spiral. The outer diameter may vary from about 3 inches (7.62cm) up to 11 inches (27.9 cm) and larger. The reference to a neat or spiral external configuration concerns the machining of the outer surface of the collar.
The sliding surface simply refers to a collar machined to a uniform cylindrical shape. The spiral collar is machined so that the spiral pattern is cut on its outer surface. The purpose of the spiral grooves is to allow the debris to pass the wire strings and prevent it from getting stuck in the hole.
pressure applied to the drill assembly using the collar and other elements of the drill chain must be carefully regulated for efficient drilling. The weight chain weight is monitored on the surface and the operator slowly reduces the drill to the hole of the registered weight does not change. If the bit rests on the bottom of the hole and the monitor shows a reduction of £ 10,000 (£ 4,540), there should be a corresponding increase in pressure to assemble the drill.
a device used in conjunction with drill collar in oil drilling behindIt pills the drill collar, drill collar clamps and hem collar. The drill click is a device used to process drill collar when connected to new sections and is adjustable to different diameters. Drills are also used when handling drill collar to prevent them from being dropped into the well. If the broken drill chain and the drill and the bit are on the bottom of the shaft, the collar is lowered and connects the connection to the drill collar by means of self -launching bits, allowing it to search.