What is drill collar in drilling?
1. n. [Drilling] A component of a drillstring that provides weight on bit for drilling. Drill collars are thick-walled tubular pieces machined from solid bars of steel, usually plain carbon steel but sometimes of nonmagnetic nickel-copper alloy or other nonmagnetic premium alloys.
What is a collar clamp used for on a drilling rig?
Type C Safety Clamp The KET Type “C” Safety Clamp is one of the most valuable tools on the Rig Floor. It helps guard against dropping flush-joint pipe, streamlined drill collars, etc. into the hole while making-up or breaking-out the string.
What is the main difference between HWDP and drill collar?
The function of the HWDP is to provide a flexible transition between the drill collars and the drill pipe. This helps to reduce the number of fatigue failures seen directly above the BHA. A secondary use of HWDP is to add additional weight to the drill bit. HWDP is most often used as weight on bit in deviated wells.
What size is drill pipe?
The length of a drill pipe is typically Range 2 at 31 feet but can come in other lengths as well. A drill pipe is thick-walled and designed to hold its own weight in a drill string as the drill pipes are often run thousands of feet under the surface.
What is a stop collar?
noun In machinery, an adjustable collar which can be placed and held by a set-screw on a shaft or rod as a stop or gage to limit the motion of a movable part sliding on the rod or shaft, as a fitting on the main shaft on which the carriage of a typewriter slides, and adjustments in many other machines.
What is the purpose of a shaft collar?
Shaft collars are used on applications from holding up a flag on a flag pole, to positioning devices on medical equipment to the more common industrial applications of holding other shaft components such as bearings, sprockets and pulleys in place.
What is a set screw collar used for?
Set screw collars are best used when the material of the shaft is softer than the set screw. Unfortunately, the set screw causes damage to the shaft – a flare-up of shaft material – which makes the collar harder to adjust or remove.
Why heavy weight drill pipe is used?
Because it bends easily, heavy weight drill pipe simplifies directional control and minimizes connection fatigue problems that are common in high-angle or horizontal drilling. For extended reach and horizontal wells, high-strength heavy weight drill pipe is often used high in the hole to apply weight on the bit.
Why do we use heavy weight drill pipe?
What is the purpose of heavy weight drill pipe?
Heavy weight drill pipe is the most commonly used in the vertical section of the hole and provides weight on the bit for directional drilling while maintaining more flexibility than a drill collar.