Chuong 1a overview of drilling engineering

Well Drilling Engineering Overview of Rotary Drilling Dr.. 1.3 - Typical drilling rig organizationPersonnel involved in drilling a well... 1.4 The rotary drilling process... Prepare dr

Well Drilling Engineering

Overview of Rotary Drilling

Dr DO QUANG KHANH

Fig: Role of drilling in field development

Introduction:

The life of an oil or gas field

can be sub-divided into the

Fig 1.3 - Typical drilling rig organization

Personnel involved in drilling a well

Fig 1.4

The rotary

drilling

process

Steps to Drill A Gas/Oil Well

1 Complete or obtain seismic, log, scouting information or other data.

2 Lease the land or obtain concession.

3 Calculate reserves or estimate from best

Steps to Drill a Well - cont’d

6 Prepare drilling and completion

program

7 Ask for bids on footage, day work, or

combination from selected drilling

contractors based on drilling program

8 If necessary, modify program to fit

selected contractor equipment

Steps to Drill a Well - cont’d

9 Construct road, location/platforms and other marine equipment necessary for access

to site

10 Gather all personnel concerned for

meeting prior to commencing drilling

(pre-spud meeting)

11 If necessary, further modify program.

12 Drill well.

Steps to Drill a Well - cont’d

13 Move off contractor if workover unit

14 Complete well.

15 Install surface facilities.

16 Analysis of operations with

Drilling Operations

Field Engineers, Drilling Foremen

A Well planning prior to SPUD

B Monitor drilling operations

C After drilling, review drilling results and

recommend future improvements

- prepare report

D General duties

What are the well requirements? Objectives, safety, cost

a

Connection

Making a

Trip

Making a mouse hole connection

Making a mouse hole connection - cont’d

Single Added Ready to Drill

Moving Kelly

to Single in

Mousehole

Stabbing the Pipe

Use Elevators for

Making a trip - cont’d

Tripping one stand

at a time 60-90 ft

Fig 1.5

Classification of rotary drilling

rigs

Sonat’s

George

Washington

A Submersible

Semi-Rig

Zapata’s Trader

A Drillship

Deep Water Development Options

SUBSEA

COMPLET

IONS

FIXED PLATFO

ANT TOWER

S FLOATIN G

PRODUC TION

SYSTEM S

TENSIO

N LEG PLATFO RMS

TENSION LEG PLATFORM

Shell’s Auger

Tension

Leg

Platform

Shell’s

Bullwinkle

World’s tallest offshore structure