Drill Rig Research Paper

PCB 2033 Drilling Engineering

Sept 2014

Group Project

Petroleum Engineering

Submitted by:

Name ID

Aqil Bin Muhammad Yusof 18161

Chew Siang Zhi 17970

Lim Zi Bing 18043

Ling Zong Hin 18454

Gan Zhe Jun 18576

1.0 INTRODUCTION

1.1 Objectives To decide the most suitable type of drill rig to be set up in a specified location (Gulf of Mexico) To illustrate the rig design with the given dimensions To calculate the technical specifications of the drill rig and the drill string

1.2 Learning Outcomes The advantages of the jack up rig when compared to other type of rigs and also its limitations Process of setting up the jack up rig in an offshore environment Listing the possible drilling activities can be done on the jack up rig To

The platform actually rests on the seabed rather than floats and is not subjected by the motion of the water compared to semi-submersibles and drill ships.

2.1.1 Setting Up

The rig is to be towed to the drilling location with its leg raised up. Upon reaching its destination, the three legs are lowered by electric jacks until they rest on the seabed. It can be slightly tilted for better stability. The deck is then set to be around 60ft above the waves.

2.1.2 Choice of Jack up Legs

The two main type used are open-truss legs which resembles a high voltage towers and columnar legs with criss-crosses:

In the case of 300ft depth of water, open-truss legs is more preferable in the design because columnar legs are less stable and can’t adapt to stresses in water as well as the open-truss legs( meant for water <250ft). Since the Gulf of Mexico is 300ft deep, open-truss legs are the best choice for the operation.

2.1.3 Advantages: Very stable drilling platform that can withstand winds up to

Towing Jack ups Rig

Move the rented Jack ups Rig to assigned location Arrangement of equipment

Move the required drilling equipment to the assigned location Jack up the rig

The process required around 5 hours. As the length is 133.5m and the jack up speed is 0.45m/minute Inspection of rig

Safety inspection is conduction before drilling process is carried out. Drilling process

Cementing and Casing are conducted in when certain depth is drilled.

Tripping out process, where the process to replace drill bits.

Logging While Drilling and Measurement While Drilling are conducted along with drilling to obtain data in order to decide whether a well should be completed, plugged or abandoned.

If the well is determined to be production well, production casing is run. Perforation

The purpose of conducting perforation is to create holes through the cement encasing and formation connecting the well bore to the reservoir. ‘Choke’

Determine the best location of choke which control the flow of oil and gas, once pressure is released hydrocarbon flow into well