Drill string information

A drill string on a drilling rig is a column, or string, of drill pipe that transmits drilling fluid (via the mud pumps) and torque (via the kelly drive...

oil-based fluid. On a drilling rig, mud is pumped from the mud pits through the drill string, where it jets out of nozzles on the drill bit, thus clearing...

driven by the hydraulic power of drilling mud circulated down the drill string) became common. These allowed the drill bit to continue rotating at the...

modern core drill is a drill specifically designed to remove a cylinder of material, much like a hole saw. The material left inside the drill bit is referred...

Eventually the drill pipe will be graded as scrap and marked with a red band. Drill pipe is a portion of the overall drill string. The drill string consists...

Rotary table Drill floor Bell nipple Blowout preventer (BOP) Annular type Blowout preventer (BOP) Pipe ram & blind ram Drill string Drill bit Casing head...

reservoir of oil and gas. As the well is drilled, drilling fluid, "mud", is fed through the drill string down to the drill bit, "blade", and returns up the wellbore...

weight onto the drill string. The earliest scientific ice drilling expedition used percussion drilling; Louis Agassiz used iron rods to drill holes in the...

block and crown block to facilitate the lowering and lifting of the drill string into and out of the wellbore. On larger diameter lines, traveling block...

A drill string compensator decreases the influence of the heave of a drilling vessel on the drill bit. Drill string compensators are also known under...

To drill the well The rotating drill bit, aided by the weight of the drill string above it, cuts into the rock. There are different types of drill bits;...

sequence or in parallel Casing string Drill string Production string Brock string, an instrument used in vision therapy String galvanometer, an instrument...

the driller & assistant driller; handles the top end of drill string on round trips. Dope: A thick lubricant used on pipe connections. Drill string: A...

diameter of the excavation, is attached to the drill string and raised back towards the machine. The drill cuttings from the reamer head fall to the floor...

A drilling stabilizer is a piece of downhole equipment used in the bottom hole assembly (BHA) of a drill string. It mechanically stabilizes the BHA in...

top drive is a mechanical device on a drilling rig that provides clockwise torque to the drill string to drill a borehole. It is an alternative to the...

riser allows for drilling fluids to move between the floor and the rig. Engineers lower a drill string – a series of pipes designed to drill down to the oil...

attached drill string turn while the polygonal pipe is free to slide vertically in the bushing as the bit digs the well deeper. When drilling, the drill bit...

drilling hit a molten sulfur deposit, which solidified around the drill string, causing the drill pipe to twist-off and a loss of the bottom-hole assembly. The...

The drill floor is the heart of any drilling rig. This is the area where the drill string begins its trip into the earth. It is traditionally where joints...

breakdown after drilling resumed; on 27 September 1984, after drilling to 12,066 metres (39,587 ft), a 5 metres (16 ft) section of the drill string twisted off...

component of a drilling rig. It is the lowest part of the drill string, extending from the bit to the drill pipe. The assembly can consist of drill collars,...

wear during the drilling process, so as to expose more diamonds. The bit is mounted onto a core barrel, that is attached to the drill string, which is connected...