A derrick is a lifting device composed at minimum of one guyed mast, as in a gin pole, which may be articulated over a load by adjusting its guys. … To lift a load, a separate line runs up and over the mast with a hook on its free end, as with a crane.
Whats the difference between a crane and a derrick?
Cranes whether fixed or mobile are driven manually or by power. A “derrick” is an apparatus consisting of a mast or equivalent member held at the head by guys or braces, with or without a boom, for use with a hoisting mechanism and operating ropes. OSHA often refers to these two lifting machines together.
What are derricks mainly used for?
In the petroleum industry, a derrick consisting of a framework or tower of wood or steel is erected over the deep drill holes of oil wells to support the tackle for boring, to raise and lower the drilling tools in the well, and to insert and remove the well casing or pipe.
How many types of derricks are there?
Oil derricks are manufactured to suit a particular rig operation such as jack-ups, platforms, semi-submersibles, or drill ships. Types of derricks include basket, breast, gin pole, guy and stiffleg.
What is the difference between Derrick and mast?
is that derrick is a device that is used for lifting and moving large objects while mast is a tall, slim post or tower, usually tapering upward, used to support, for example, the sails on a ship, flags, floodlights, or communications equipment such as an aerial, usually supported by guy-wires or mast can be the fruit …
What is the advantage of crane over Derrick?
Cranes are acceptably safer to operate because of their simplicity, where derrick rigs can be overly complicated in rigging and operation. Cranes can easily service two hatches, or twin hatches in the fore and aft direction because of their 360° slew ability.
Is a crane a derrick?
A crane is a machine that makes use of a hoist rope, wire rope, or chain with a sheave (a pulley system) to lift heavy objects. A derrick is a machine that makes use of a least one guyed mast or self-supporting tower and a boom. … Both are machines that have a history that spans as far back as ancient times.
Why it is called Derrick?
The term derrick is also applied to the framework supporting a drilling apparatus in an oil rig. The derrick derives its name from a type of gallows named after Thomas Derrick, an Elizabethan era English executioner.
What does Derick mean?
The name Derick is primarily a male name of English origin that means People Ruler.
What caused the mud rocks and oil to explode out of the drilling hole?
In addition to oil, the output of a well blowout might include natural gas, water, drilling fluid, mud, sand, rocks, and other substances. Blowouts will often be ignited from sparks from rocks being ejected, or simply from heat generated by friction.
What is difference between lifting and rigging?
Rigging refers to the maneuvering of heavy objects by way of pushing, pulling, lifting or hoisting. Lifting is a way to move heavy objects by moving the object up from below most commonly using a jack.
What is another word for Derrick?
What is another word for derrick?
What will be the tension of the cargo runners when its on 90 degrees?
a) At 60° included angle, the tension in each runner would be just over half the load; b) At 90° the tension would be nearly three-quarters of the load; c) At 195° the tension would be nearly 12 times the load.
What is mast in drilling rig?
1. n. [Drilling] The structure used to support the crown block and the drillstring. Masts are usually rectangular or trapezoidal in shape and offer a very good stiffness, important to land rigs whose mast is laid down when the rig is moved.
What is Derrick ballast?
If a strong wind comes up suddenly the LTR 1220, acting as “mobile derrick ballast”, can be used to lower the boom quickly and safely whatever its location. The new erection concept from Liebherr can be used for all long boom systems up to a length of 156 metres with a 12 metre fixed jib.
What is a derrick oil and gas?
An oil derrick is used to dig a hole for an oil well, then to push the drill pipe deep into the earth. A mud mixture is sprayed from the drill bit to push material from the cuttings up out of the hole and cool the drill equipment, as well as to keep the bore hole stable.