TECHSHORE INSPECTION SERVICES : HOISTING SYSTEM

INTRODUCTION

All the lifting activities in rig are carrying out with the help of hoisting system. Lifting activities include lowering and raising of equipments in and out of the hole for performing drilling activities. For all the purpose that is for drilling operation, casing operation, slickline operation, coring, production we use hoisting system to lowering and lifting the respective tool in or out of the hole.

DERRICK

The structure used to support the crown block and traveling block of a drilling rig. Usually pyramid in shape. It cannot be built as a single unit. It can withstand high weight ratio. Derrick is the identifiable symbol of drilling rig in oil and gas industry.

MAST

This is also a type of derrick which can be erected as a single unit. This is designed to withstand low weight ratio. It is called as portable derrick.

SUBSTRUCTURE

It is like a platform in which derrick or mast is placed.BOP or X-tree is placed below the substructure. The top of substructure is like a platform called as RIG FLOOR, where the floor mans work.

DRAW-WORK

It is a mechanical device that consists of spool. The main function of draw work is to real in & real out the drill line, so that the travelling block can be raised or lowered.

DRILL LINE

It is a thick metal rope which is used for raising or lowering the drillstring.It has an outside diameter of 1 3/8”.It has two line dead line and fast line.The moving portion of drill line is known as fast line and the line which is fixed is known as dead line.

DEADLINE ANCHOR

It is positioned at the A-block structure. It holds the dead line of the drill line. After concerned tone mile, when drill line undergoes wear and tear, it supplies drill line to the draw works.

CROWN BLOCK

It is placed at the top of derrick; IT is also called as head of derrick. It is fixed and it consists of set of pulleys called as sheaves. By the movement of sheaves uniformly the travelling block is moved upwards and downwards in a controlled manner. 

 

TRAVELLING BLOCK

Travelling block is designed to move freely up and down by the action of set of pulleys called sheaves, as they are connected with sheaves of crown block through drill line. It comes with a combination of hook and load host. IT can withstand load up to 650 tons.

SUPPLY REAL

It is like a round drum which stores the drill line that uses for drilling. It supplies drill line to crown block then to the draw-works.

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