Motor Handbook Edition 1

Motor Handbook

Edition 1

Interpretation of the data presented is the responsibility of individuals

using this data. Crescent Directional Drilling cannot be held

responsible for any loss or damage to any property whatsoever; injury

or death to any persons whatsoever; or any claims, demands, actions,

complaints, proceedings, judgement, losses, damages, compensation,

liabilities, costs or charges, however arising from the unauthorized or

undirected use of this handbook.

Copyright © 2011 by Crescent Directional Drilling LP. All rights

reserved.

Without the express written consent of Crescent Directional Drilling

LP., this handbook or any of its part may NOT be reproduced or

distributed in any form or by any means, including electronic media.

Edition 1 : November 2011

Handbook Designer and Editor:

Brandt Weimar

Tommy Simmons

Brandt Weimar

Cody Christensen

Jeff Pool

Wayne Johnson

Steve McCleskey

BJ Goodnight

Ron Handley

Lynn Hensley

Wayne Mills

John Jordan

Joel McCranie

Jay Hammonds

Clay Nagle

David O’Connell

www.crescentdirectional.com

Technical Contributions:

Facility Locations 1

Forward 2

Crescent Directional Drilling Services 3

Health, Safety, & Environment 4

Crescent Motor Adjustment 5

Tomahawk Motor Adjustment 6

Motor Operation Procedure 7

Motor Diagram 8

Pressure Reduction Factor 9-10

4-3/4” Motor Performance Data 11-20

6-1/2” Motor Performance Data 21-32

6-3/4” Motor Performance Data 33-44

8” Motor Performance Data 45-48

9-5/8” Motor Performance Data 49-50

LCM Tolerances (MWD) 51

MWD Measurements 52

Magnetic Spacing Chart 53

Formulas 54

Fishing Dimensions 55-56

Drill Collar Torques 57-59

Bit Make-Up Torques 60

Directional Radius of Curvature 61

Total Flow Area Chart 62

Bouyancy Factor 63

Float Valve Dimensions 64

Heavy-Weight Drill Pipe 65

Drill Collar Weight 66

Recommended Maximum Drillstring Rotary Speed 67

Build Up Rate Formula 68

4 3/4” Build Up Rates 69

6 1//2” Build Up Rates 70

6 3/4” Build Up Rates 71

8” Build Up Rates 72

9 5/8’ Build Up Rates 73

Table of Contents:

1

Facility Locations

Corporate Office

2040 Aldine Western Rd.

Houston, Texas 77038

Corporate: 281-668-9535

Houston Operations: 281-668-9500

Fax: 281-668-9539

Facility Locations

Rocky Mountain Sales Office

1600 Glenarm Place

Suite 904

Denver, CO 80202

Phone: 303-258-6278

Fax: 303-534-2236

Rocky Mountain Operations &

Repair Facility

1354 Seven Mile Road

Casper, WY 82604

Phone: 307-266-6500

Fax: 307-266-6505

Mid Continent Operations &

Repair Facility

1231 East Reno

Oklahoma City, OK 73117

Phone: 405-553-9909

Fax: 405-553-9920

Appalachian Region

100 Imperial Industrial Park

Oakdale, PA 15071

Phone: 724-695-1408

Fax: 724-695-1413

Permian Basin Sales Office

7715 West Industrial Ave.

Midland, TX 79706

Phone: 432-618-1135

2

Foreward

Foreward

TAKING YOU IN NEW DIRECTIONS

Crescent Directional Drilling, is a leader in

Directional Drilling - a complex process of drilling

non-vertical wells to increase energy production,

decrease hazardous situations and reduce

environmental impact.

Founded in 2003, the Company has extensive

experience, with its management boasting an average

of 25 years of experience - many with even more.

That expertise also extends to its staff of

coordinators and planners - all with significant

knowledge.

Crescent is a customer-focused, employee-friendly

and technically-advanced company. Known to many

as the "World's best Directional Drilling company,"

Crescent Directional Drilling prides itself on

customer attentiveness, its focus on their employees

and its industry-leading position.

CORE IDEOLOGY

We exist to serve our customers. All else is

secondary. We will accomplish this by fielding the

industry's best Directional Drillers and MWD/EM-

MWD engineers armed with a commitment to go the

extra mile to insure our customer's success in a safe

manner. In addition, office support will be like

minded and employ state of the art technology. An

emphasis on quality will permeate our organization

and the industry's best fit for purpose equipment

will be utilized on all jobs.

3

Conventional Directional Drilling on Land

or Offshore

Extended Reach Wells

3-D Directional Wells

Horizontal Directional Drilling

Casing Jet-in

Jetting / Nudging

Multi-well Platform Drilling

Deepwater Directional Drilling

Cased and Open Hole Sidetracks

Wellbore Correction

Directional Drilling for Underbalanced

Applications

Straight Hole Performance Motor Drilling

Having the proper tools and equipment to

accomplish the job in a quick, efficient and

safe manner is paramount to Crescent

Directional Drilling. We offer our clients a

large selection of in-house products and tools,

each assembled and packaged to meet and

exceed the unique needs of the directional

drilling.

Crescent Directional Drilling Services

Drilling Services

4

Health, Safety, & Environment

Health, Safety, & Environment

Crescent Directional Drilling understands the

importance of providing a safe, accident-free and

healthy work environment. Everyone at Crescent

Directional Drilling takes an active role in safety

and accident avoidance by diligent work and

careful attention to all company policies.

The prevention of occupationally induced injuries

and illnesses is of such significance that we give

it precedence over operating productivity

whenever necessary—no questions asked. Our

safety and accident avoidance programs helped

establish a foundation on which Crescent

Directional Drilling was built—protecting our

greatest assets to ensure our future success.

Crescent Directional Drilling’s primary goal is to

serve our customers by providing the industry’s

best Directional Drillers and MWD/EM-MWD

Engineers to ensure our customer’s success.

5

Crescent Adjustable Motor Instructions

Motor Adjustment

CRESCENT ABH ADJUSTMENT PROCEDURE *ADJUST FROM 0° to 1°

6

Tomahawk Adjustable Motor Instructions

Motor Adjustment

7

Motor Operation

All Crescent motors are sent to the job site with connections

torqued and adjustable housings set to desired angle requested.

Thread protectors are installed on the bit box and top sub. The

motor serial number will be stamped on the bit box of each motor.

Crescent motors can be configured to operate in various conditions

including hot hole, oil based and caustic drilling fluids. The motor

should be visually inspected upon arrival at the rig site for any

damages that may have occurred during shipping and also to make

sure the motor is configured properly.

Thrust bearing wear can be determined by hanging the motor above

the rig floor and taking a measurement between the bit box and the

bottom of the motor bearing housing. Record the measurement.

Then set the bit box on the rig floor allowing the weight of the

motor to compress the bearings, take a measurement from the same

point and subtract from the previous measurement. The difference

between these two measurements should be as follows:

.167” (max.) for 4 3/4” motors

.217” (max.) for 6 1/2” & 6 3/4” motors

.295” (max.) for 8” motors

.333” (max.) for 9 5/8” motors

**Replace the motor if the maximum measurement is exceeded**

A shallow test is recommended to insure proper operation of the

motor and MWD tool. It is also recommended to run a float on top of

the motor to prevent damage to the motor. Some Crescent motors

incorporate a top sub bored for a float, otherwise a float sub will be

provided. When tripping in the hole, it is recommended to break

circulation periodically especially if heat is a factor. Pressure

readings should be recorded for reference later if any problems

should occur.

To start the motor, avoid dropping or ‘spudding’ the motor on the

bottom of the hole. Start circulating a few feet off bottom and raise

the flow rate to recommendations of the particular motor. Apply

weight gradually to achieve optimum differential pressure. Do not

exceed specified maximum differential pressure. The motor may

stall if the power demand exceeds the output of the motor. If the

motor stalls while sliding, immediately shut off the pumps, pull the

motor off bottom, and restart. If the motor stalls while rotating,

shut down the pumps and rotary immediately, pull off bottom, and

then restart. Prolonged stalling will damage the power section. When

the motor run is completed, drain the motor and reinstall thread

protectors.

Motor Operation Procedure

8

FLOW DIVERTER

END NUT & LOWER

INNER RADIAL SLEEVE

BALL BEARING STACKUP

BEARING MANDREL

UPPER INNER & OUTER

RADIAL SLEEVE

TRANSMISSION

ROTOR & STATOR

ROTOR CATCH TOP SUB

CATCH RING

Motor Diagram

FIXED BEND HOUSING

9

Effects of Downhole Temperature

The strength of the elastic liner in the stator diminishes

as the static downhole temperature increases. With an

increase in the downhole temperature, the maximum

recommended pressure drop across the power section

should be adjusted accordingly to avoid premature

deterioration of the stator elastomer.

No adjustment is needed for temperatures up to 140°F.

However, with temperatures above 140°F, the maximum

differential pressure (from the power section charts)

must be multiplied by the ∆P Reduction Factor that

corresponds to the downhole temperature being

experienced by the motor.

Example:

For a maximum recommended differential pressure of

500 psi and a static downhole temperature of 160°F:

∆P Reduction Factor = 87%

500 psi * .87 = 435 psi

As can be seen above, the maximum recommended

differential pressure for this example is 435 psi.

Pressure Reduction Factor

10

Pressure Reduction Factor

11

4-3/4” 4:5 Lobe 6.3 Stage

12

4-3/4” 4:5 Lobe 6.3 Stage

13

4-3/4” 5:6 Lobe 8.3 Stage

14

4-3/4” 5:6 Lobe 8.3 Stage

15

4-3/4” 7:8 Lobe 2.6 Stage

16

4-3/4” 7:8 Lobe 2.6 Stage

17

4-3/4” 7:8 Lobe 3.8 Stage

18

4-3/4” 7:8 Lobe 3.8 Stage

19

4-3/4” 7:8 Lobe 5.0 Stage

20

4-3/4” 7:8 Lobe 5.0 Stage

21

6-1/2” 2:3 Lobe 7.8 Stage

22

6-1/2” 2:3 Lobe 7.8 Stage

23

6-1/2” 4:5 Lobe 7.0 Stage

24

6-1/2” 4:5 Lobe 7.0 Stage

25

6-1/2” 7:8 Lobe 2.1 Stage

26

6-1/2” 7:8 Lobe 2.1 Stage

27

6-1/2” SLOW 7:8 Lobe 3.0 Stage

28

6-1/2” SLOW 7:8 Lobe 3.0 Stage

29

6-1/2” 7:8 Lobe 3.0 Stage

30

6-1/2” 7:8 Lobe 3.0 Stage

31

6-1/2” 7:8 Lobe 5.0 Stage

32

6-1/2” 7:8 Lobe 5.0 Stage

33

6-3/4” 2:3 Lobe 7.8 Stage

34

6-3/4” 2:3 Lobe 7.8 Stage

35

6-3/4” 4:5 Lobe 7.0 Stage

36

6-3/4” 4:5 Lobe 7.0 Stage

37

6-3/4” 7:8 Lobe 2.1 Stage

38

6-3/4” 7:8 Lobe 2.1 Stage

39

6-3/4” SLOW 7:8 Lobe 3.0 Stage

40

6-3/4” SLOW 7:8 Lobe 3.0 Stage

41

6-3/4” 7:8 Lobe 3.0 Stage

42

6-3/4” 7:8 Lobe 3.0 Stage

43

6-3/4” 7:8 Lobe 5.0 Stage

44

6-3/4” 7:8 Lobe 5.0 Stage

45

8” 7:8 Lobe 3.4 Stage

46

8” 7:8 Lobe 3.4 Stage

47

8” 7:8 Lobe 4.0 Stage

48

8” 7:8 Lobe 4.0 Stage

49

9-5/8” 5:6 Lobe 4.0 Stage

50

9-5/8” 5:6 Lobe 4.0 Stage

51

LCM Tolerances M

WD

LC

M T

ole

ran

ces

No

te:

Th

e to

lera

nce

s sh

ow

n a

bo

ve a

re f

or

info

rma

tio

n p

urp

ose

s o

nly

an

d a

re n

ot

gu

ara

nte

ed.

52

MWD Measurements

53

Magnetic Spacing Chart

No

te:

Mo

re t

ha

n o

ne

dri

ll co

llar

is n

eed

ed a

bo

ve t

he

sen

sor

wh

en in

th

e re

gio

n b

elo

w a

nd

to

th

e ri

gh

t o

f th

e re

d c

urv

e.

54

Formulas

Horse Power

T = Torque (lb-ft)

N = Speed (rpm)

P = Pressure Drop (psi)

Q = Flow Rate (gpm)

Pressure

Total Flow Area

P = Pressure Drop (psi)

Q = Flow Rate (gpm)

W = Mud Weight (ppg)

A = Total Flow Area (in2)

Bit Pressure Drop

Hydrostatic D = Vertical Depth (ft)

W = Mud Weight (ppg)

P = Bit Pressure Drop (psi)

Q = Flow Rate (gpm)

W = Mud Weight (ppg)

55

Fishing Dimensions

56

Fishing Dimensions

No

te: L

eng

ths

are

giv

en in

fee

t a

nd

dia

met

ers

are

giv

en in

inch

es.

57

API Drill Collar Torques

Note: Pick the closest value for ID and OD, pick material type,

and use the lowest torque of the values (pin/box).

Drill Collar Torques

58

Drill Collar Torques

59

Drill Collar Torques

60

Reco

mm

en

ded

Bit

Make-u

p T

orq

ues

Bit Make-Up Torques

61

Directional Radius of Curvature

Radius of Curvature

62

Total Flow Area Chart

63

Bouyancy Factor

Bouyancy Factor

64

Float Valve Dimensions

Float Valve Dimensions

65

Heavy-Weight Drill Pipe

Heavy-Weight Drill Pipe

66

Drill Collar Weight

Drill Collar Weight

Linear weight of steel drill collars (lbs/ft)

67

No

te:

Ro

tati

ng

Cre

scen

t M

oto

rs w

ith

ben

d a

ng

les

mo

re t

ha

n 2

deg

rees

is n

ot

reco

mm

end

ed.

Max Drillstring Rotary Speed

68

Build Up Rate Formula

Radius of Curvature =

Build Rate =

Note: Lengths must be in feet.

Build Up Rate

(Three Point Geometry)

69

4 3/4” Build Up Rates

No

te:

Bu

ild r

ate

s g

iven

are

th

eore

tica

l an

d w

ill v

ary

dep

end

ing

on

fo

rma

tio

n, b

it t

ype,

bo

tto

m h

ole

ass

emb

ly, w

eig

ht

on

bit

, a

nd

ho

le c

ha

ract

eris

tics

.

70

6 1/2” Build Up Rates

No

te:

Bu

ild r

ate

s g

iven

are

th

eore

tica

l an

d w

ill v

ary

dep

end

ing

on

fo

rma

tio

n, b

it t

ype,

bo

tto

m h

ole

ass

emb

ly, w

eig

ht

on

bit

, a

nd

ho

le c

ha

ract

eris

tics

.

71

6 3/4” Build Up Rates

No

te:

Bu

ild r

ate

s g

iven

are

th

eore

tica

l an

d w

ill v

ary

dep

end

ing

on

fo

rma

tio

n, b

it t

ype,

bo

tto

m h

ole

ass

emb

ly, w

eig

ht

on

bit

, a

nd

ho

le c

ha

ract

eris

tics

.

72

8” Build Up Rates

No

te:

Bu

ild r

ate

s g

iven

are

th

eore

tica

l an

d w

ill v

ary

dep

end

ing

on

fo

rma

tio

n, b

it t

ype,

bo

tto

m h

ole

ass

emb

ly, w

eig

ht

on

bit

, a

nd

ho

le c

ha

ract

eris

tics

.

73

9 5/8” Build Up Rates

No

te:

Bu

ild r

ate

s g

iven

are

th

eore

tica

l an

d w

ill v

ary

dep

end

ing

on

fo

rma

tio

n, b

it t

ype,

bo

tto

m h

ole

ass

emb

ly, w

eig

ht

on

bit

, a

nd

ho

le c

ha

ract

eris

tics

.

www.crescentdirectional.com

Corporate Office

2040 Aldine Western Rd.

Houston, Texas 77038

Corporate: 281-668-9535

Houston Operations: 281-668-9500

Fax: 281-668-9539

Rocky Mountain Sales Office

1600 Glenarm Place

Suite 904

Denver, CO 80202

Phone: 303-258-6278

Fax: 303-534-2236

Rocky Mountain Operations &

Repair Facility

1354 Seven Mile Road

Casper, WY 82604

Phone: 307-266-6500

Fax: 307-266-6505

Mid Continent Operations &

Repair Facility

1231 East Reno

Oklahoma City, OK 73117

Phone: 405-553-9909

Fax: 405-553-9920

Appalachian Region

100 Imperial Industrial Park

Oakdale, PA 15071

Phone: 724-695-1408

Fax: 724-695-1413

Permian Basin Sales Office

7715 West Industrial Ave.

Midland, TX 79706

Phone: 432-618-1135