Hybrid Drill Bits

Optimised Hybrid Drill Bit Technology Matched to

Application Yields Breakthrough in Drilling

Performance

Presenter: Waleed Agawani

Application Introduction

BHA Used: 12.25in Bit + Near Bit Stabiliser + 8in Pony

Drill Collar (10ft) + Stabiliser + 8.25in Drill Collar (29ft)

+ Stabiliser + 15 x 8.25in Drill Collars

Total interval length of 2,500 ft

Compressive strengths range from 20-35 Kpsi

Application Introduction

PDC Performance – Faster, Poor Durability

TCI Performance – Slower, Better Durability

Typically requires 2 bit runs to complete the section

Operator Objectives

• Complete Section in One Run Consistently – Save

Time and Cost

• Improve Cost Per Foot (CPF) – Faster vs Durable

Bit

Hybrid Solution

PDC cutting strcture and TCI cones completement

each other’s strengths.

Improved durability with faster and more efficient

drilling.

Trial Results

Goal 1: Complete the section in one run

• Conventional bit offset wells required 2 bits to

complete

• Hybrid bits were able to complete the section in one

run consistently

0

15

30

45

60

750

1000

2000

3000

4000

5000

Run 1 Run 2 Run 1 Run 2 Run 1 Run 1 Run 1 Run 1

Well 1 Well 2 Well 3 Well 4 Well 5 Well 6

Foota

ge (

ft.)

RO

P (

ft./hr.

)

Trial Results

Goal 2: Improve CPF

• Eliminating one bit trip reduced CPF from trip time.

• Efficient drilling improved ROP which compounded

on CPF improvement.

• Over 60% CPF reduction

0,0

10,0

20,0

30,0

40,0

50,0

60,0

70,0

0

10

20

30

40

50

60

70

Well 1 Well 2 Well 3 Well 4 Well 5 Well 6

Co

st P

er

Foo

t(U

SD

/ft.

)

RO

P (

ft./h

r.)

Trial Results

Post-run dull grading showed reduced damage than

conventional bit post-run dulls.

Hybrid cutting structure better suited to the application,

resulting in more efficient drilling.

Well No. Dull Grading

TCI Offset TCI Dull 3-4-BT-A-E-I-WT-TD

PDC Offset PDC Dull 4-5-BT-A-X-I-CT-TD

Hybrid Trial 1PDC Dull

TCI Dull

1-2-BT-S-X-I-NO-TD

1-2-WT-A-E-I-CT-TD

Hybrid Trial 2PDC Dull

TCI Dull

1-1-WT-A-X-I-NO-TD

2-2-WT-A-E-I-BT-TD

Hybrid Trial 3PDC Dull

TCI Dull

1-2-WT-S-X-I-NO-TD

2-3-WT-A-E-I-CT-TD

Hybrid Trial 4PDC Dull

TCI Dull

2-2-CT-A-X-I-WT-TD

2-2-WT-A-E-I-CT-TD

Conclusion

Where PDC bits suffer impact damage & TCI

bits are slow, hybrid drill bits optimizes

between them as the ideal choice.

The results in our application:

• 4 days faster section delivery

• 60% CPF improvement

• 100K section cost reduction

• Improved post-run dull

What are your questions?