Chapter 2

Rig Components (Calculations)

Updated Schedule

Day Time Venue

Wednesday 09.00 – 12.00 15.02.07

Wednesday 12.00 – 15.00 15.02.07

▣ Lab

5 minutes HSE3

Which One Are You?while driving in UTP

Xhttps://www.youtube.com/watch?v=hGir-a0g9aQGood example:

What's Your Learning Style?

PDB3033 Drilling Engineering I (Part 1)May 2016 SemesterM Aslam Md Yusof

1. Search http://www.educationplanner.org/students/self-assessments/learning-styles-quiz.shtml

Kindly answer all the 20 questions. It will take less than 5 minutes of your time.

2. Get your result

Click on the ‘Printer Friendly Version’ link.

3. Fill in your details Fill in your Full Name & Matric No in the empty column.

Click ‘Yes, add my name’ link.

4. Print your result

Print only the 1st page of your result on a A4 paper.

Kindly submit your result on 9th June 2016 during the class

The analysis will be used to improve the teaching and learning activities throughout the course

Thank you for your understanding!

Learning Objectives

▹ To describe the main systems available on drilling rig ▹ To identify the main components of the drilling rig and

its functions ▹ To perform calculations related to the respective drilling

systems

10

Power System

11

POWER SYSTEM12

▹ Provide necessary power to carry drilling job▹ Modern rig: Diesel powered▹ Raw power transmission (Mechanical drives, DC, AC)

https://www.youtube.com/watch?v=io6DYFRzlTs

13 Example 1

Based on the data given, determine the output power, BHP and overall efficiency, 𝐸𝑜

▹ Output torque from a diesel engine, 𝑇 = 1300 𝑓𝑡. 𝑙𝑏𝑓▹ Engine speed, 𝑁 = 1000 𝑟𝑝𝑚▹ Fuel type = Diesel▹ Fuel consumption rate, 𝑤𝑓 = 30 𝑔𝑎𝑙 ℎ𝑟

14 Example 1

Output power, BHP

𝐵𝐻𝑃 =2 × 𝜋 × 𝑁 × 𝑇

33000 𝑓𝑡. 𝑙𝑏𝑓 𝑚𝑖𝑛 ℎ𝑝

𝐵𝐻𝑃 = 6283.2𝑟𝑎𝑑

𝑚𝑖𝑛× 1300 𝑓𝑡. 𝑙𝑏𝑓 ×

ℎ𝑝.𝑚𝑖𝑛

33000𝑓𝑡. 𝑙𝑏𝑓

𝐵𝐻𝑃 = 247.5 ℎ𝑝

15 Example 1

Total heat energy consumed by the engine

𝑄𝑖 =𝑤𝑓 × 𝐻 × 𝜌

33000 𝑓𝑡. 𝑙𝑏𝑓 𝑚𝑖𝑛 ℎ𝑝

𝑄𝑖 =30

𝑔𝑎𝑙ℎ𝑟

× 7.2𝑙𝑏𝑚𝑔𝑎𝑙

×ℎ𝑟

60 𝑚𝑖𝑛× 19000

𝐵𝑡𝑢𝑙𝑏𝑚

× 779𝑓𝑡. 𝑙𝑏𝑓𝐵𝑡𝑢

33000𝑓𝑡. 𝑙𝑏𝑓ℎ𝑝.𝑚𝑖𝑛

𝑄𝑖 = 1614.7 ℎ𝑝

16 Example 1

The overall efficiency of the engine at 1000 rpm is

𝐸𝑜 =𝐵𝐻𝑃

𝑄𝑖

𝐸𝑜 =247.5

1614.7= 0.153 𝑜𝑟 15.3%

17 Example 2

The following data were obtained on a diesel engine. Based on the data given, determine the output power, BHP and overall efficiency, 𝐸𝑜 at each engine speed

Engine speed

(rpm)

Torque

(𝑓𝑡. 𝑙𝑏𝑓)

Fuel Consumption

( 𝑔𝑎𝑙 ℎ𝑟)

1200 1400 25.3

1000 1550 19.7

800 1650 15.7

600 1700 12.1

18 Example 2

The following data were obtained on a diesel engine. Based on the data given, determine the output power, BHP and overall efficiency, 𝐸𝑜 at each engine speed

Engine speed

(rpm)

Torque

(𝑓𝑡. 𝑙𝑏𝑓)

Fuel

Consumption

( 𝑔𝑎𝑙 ℎ𝑟)

BHP 𝐸𝑜

1200 1400 25.3 319.9 23%

1000 1550 19.7 295.1 27.8%

800 1650 15.7 251.3 29.7%

600 1700 12.1 194.2 29.8%

19 Example 3

In a drilling operation major power supply is required by the hoistingsystem, rotary system, circulation system and mud cleaning equipment. Ifthe output horsepower required by the top drive is 2200 hp, the hoistingsystem, 2000hp, the circulation system, 2400hp, cleaning equipment,300hp and 20% of all is required for additional facilities, calculate thediesel consumption for a 25 days drilling operation and casing operation(in gallons). The overall engine efficiency, 𝐸𝑡, is 15% and transmissionefficiency, 𝐸𝑡ℎ, is 85%. Other data;

▹ Heat value of fuel, 𝐻 = 19500 𝐵𝑡𝑢 𝑙𝑏𝑚▹ Density of fuel, 𝜌 = 7.5 𝑙𝑏𝑚 𝑔𝑎𝑙

20 Example 3

The overall power system efficiency, 𝐸𝑜

𝐸𝑜 = 𝐸𝑡 × 𝐸𝑡ℎ𝐸𝑜 = 0.15 × 0.85 = 0.128

Total output horsepower

𝐻𝑃 = 2200ℎ𝑝 + 2000ℎ𝑝 + 2400 + 300 1.2 = 8280ℎ𝑝

Input horsepower

𝑄𝑖 =𝐵𝐻𝑃

𝐸𝑜=

8280

0.128= 64687.5 ℎ𝑝

21 Example 3

Fuel consumption rate, 𝑤𝑓

𝑤𝑓 =𝑄𝑖

𝐻 × 𝜌

𝑤𝑓 =64687.5 × 33000

19500 × 7.5 × 779= 18.74

𝑔𝑎𝑙

𝑚𝑖𝑛×60 𝑚𝑖𝑛

ℎ𝑟×24 ℎ𝑟

𝑑𝑎𝑦= 26981

𝑔𝑎𝑙

𝑑𝑎𝑦

Fuel consumption for the total drilling operation of 25 days

𝑤𝑓 = 26981𝑔𝑎𝑙

𝑑𝑎𝑦× 25 𝑑𝑎𝑦𝑠 = 674533.4 𝑔𝑎𝑙

22

Thank you!