Soran University 1

7/23/2019 Soran University 1

1/23

Soran University

Fculty of Engineering

Dpartment petroleum

engineering

Roller cone bit

Prepared by:Sairan Abdulaziz Mammad

Supervisor:!"#agar

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Table of Contents!able of $gure:"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""%

&" Abstract"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""'

%"(ntroduction:"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""")

'"*istory:""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""+)" Roller cone bit classi$cation:""""""""""""""""""""""""""""""""""""""""""""""""""""""""",

)"&-(AD. .lassi$cation:"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""/

0"1earing system of roller cone bit:"""""""""""""""""""""""""""""""""""""""""""""""""""2

0"&-Roller-bearing systems:"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""2

0"%-3ournal-bearing systems""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""&4

Seal systems:"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""&%

+"Roller cone bit design:""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""&)

+"&-Roller cone bit design goals""""""""""""""""""""""""""""""""""""""""""""""""""""&0," Metod for simulating drilling of roller cone bits and its applicationto roller cone bit design and performance :"""""""""""""""""""""""""""""""""""""&+

/"Roller cone bit 5it positive and negative o6set and smootrunning con$guration:""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""&,

2" Factors A6ecting !or7ue for a Roller .one 1it:"""""""""""""""""""""""""""""&/

&4".onclusion:"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""&2

&&"references:""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""%4

Table of gure:

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1-Roller conebit888888888888888888888888888888888

8888888+2-!ypical roller-bearing

arrangement88888888888888888888888888888"&&

3-.omparison of #ournal- and roller-bearingarrangements8888888888888888"&%

4-E9ploded vie5 of seal and bearingcomponents8888888888888888888888&'

5-!ypical roller-cone bit lubricant reservoirsystem888888888888888888888"&+

1.Abstract

A roller cone bit is described" !e roller cone bit includes a body

aving concave sides" egs are attaced or integral to te body"

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Roller cones are rotatable engaged to te legs" !e concave sides

are positioned ad#acent te legs" A nozzle is positioned in an

appro9imately central portion of te body" Also ave tree part also

roller cone bit classi$ed depend on !.; Mille-toot bits.

1earing system also apart on a roller cone bit and is designed in

conditions 5en te cutting structure of te bit is 5orn out ; also

roller cone bit designed due to various varies of roller cone bits and

speci$c formation and particular environment.

Simulating performance to of roller cone bit to design it and to

optimize te drilling performance of it and to represent drilling ;so

tor7ue need to be rotate te roller cone bit for many reason li


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2.Introduction:

Roller cone bit is a tool 5ic miner is used for drilling te eart at

te time of mining operation "Drilling =uids are blo5n up via roller

cone bit to =us out drill cutting" !e roller cone bits contain roller

cones tat are rotatableconnected to te bit troug a bearing

system "roller cones rotate as te roller cone bit boresin to te

eart. >S


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Fig"&-roller cone bit">burinte


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3.History:

Roller con bit as strongly been ac7uired for more tan its ', yearsB

e9perience of creating ig 7uality roc< destruction tools in te

USA in %4&4 as it is a useful 5ay for manufacturing facility; to

smootly running and ultimately upgradable manufacturing

tecnologies; 5ic generate AP(C(S certi$ed production for

internal and e9ternal >continuing Russian? mar


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4.Roller cone bit classication:

Roller-cone bits classification is generally based on:

1- Tungsten carbide inserts (TCI) bits

Or

2- Milled-tooth bits.

In order to hel in co!arison of si!ilar roducts fro! "ariety of

!anufacturers# the International $ssociation of %rilling Contractors (I$%C)

&as organi'ed a unified bit classification syste! for the na!ing of drill bits.2

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4.1-IADC Classifcation:

I$%C code consists of four characters# indicating bit design and for!ation

tye being drilled. *irst three characters are nu!erical# fourth one +literal. The

nu!erical code characters se,uence is deter!ined as series-tye-

bearinggauge/. *ourth literal code character defines additional features.

1) *irst code digit+roller cone bit series (1-0):

ight categories of roller cone bit series corresond to general characteristics

of roc for!ations being drilled. 3eries fro! 1 to 4 deter!ine 3teel Tooth bits#

and series fro! 5 to 0 +Tungsten Carbide Tooth.

Increasing of inside grou digits designates increasing of roc for!ation

hardness.

2) 3econd code digit+roller cone bit tye (1-5).:ach series di"ided into 5 tyes according to roc for!ation hardness.

Tye 1 corresonds to drill bits for the softest roc for!ations &ithin the

series# and tye 5 +for the hardest ones.

4) Third code digit(1-6):Characteri'e bearing tye and gauge rotection a"ailability.

5) *ourth literate code character+additional features/: (unre,uired). 17

letters are used to describe secific cutting structures# bearings# 8ets and

gauge rotections of a bit. If bit has !ore than one additional feature the

only !ost significant one is to be indicated. 2

.!earing syste" of roller cone bit:Roller cone bearing syste!s are oerations designed to be in satisfactory

condition &hen the cutting structure of the bit is &orn out. In order to gain this

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standard of bearing erfor!ance# there are also 1 !illion or !ore re"olutions

of a bit &ithout failure !odern goals for seal and bearing syste! life# as

oosed to 94# or fe&er in the recent ast.

Roller-cone bits ri!arily use t&o tyes of bearings:

- Roller bearings

- ;ournal bearings# so!eti!es called friction bearings. 4

.1-Roller-bearing syste"s:

.ommon bit-bearing systems are called Roller bearings because

large loads can be dependably defended and generally performed

5ell in te drilling environment" !e system is typically used on

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larger-diameter bits; 5ic ave more pysical space to aid te

rollers" eading manufacturers continually researc bearing

materials; sizing; and sape is to enance bearing life"@'

Fig. 2Typical roller-bearing arrangement.@'

.2-#ournal-bearing syste"s

3ournal bearings are based of at least one rotating surface separated

from te #ournal by a $lm of lubricant" !e surfaces are specially

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designed tats 5y te $lm of lubricant separates tem 5ere tey

can touc 5en te bearing components mate it 5ould put out or

possibly fuse te system" 3ournal bearings are e9tremely eGcient; as

long as satisfactory lubrication is provided and loading remains

5itin design limits"@'

Fig. 3Comparison of journal- and roller-bearing arrangements [3]

Eac type is normally composed of a number of separate

components; including:

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relationsip to eac oter ma


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engineered to ro"ide reser"e storage# ositi"e deli"ery to the bearing

syste!# caacity for ther!al e>ansion# and ressure e,uali'ation &ith fluids

on the bit e>terior.4

Fig. $Typical roller-cone bit lubricant reser"oir system.[3]

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&.Roller cone bit design:?ide "arieties of roller cone bits are a"ailable. They ro"ide oti!u!

erfor!ance in secific for!ations andor articular drilling en"iron!ents.

Modern drill bits incororate significantly different cutting structures and use

"astly i!ro"ed !aterials# resulting in i!ro"ed bit efficiency. Manufacturers

&or closely &ith drilling co!anies to collect infor!ation about their bits to

identify oortunities for design i!ro"e!ents.2

&.1-Roller cone bit design goals

Roller-cone bit design goals e>ect the bit to do the follo&ing:

*unction at a lo& cost er foot drilled.

@a"e a long do&nhole life that !ini!i'es re,uire!ents for triing.


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The for!ation and drilling en"iron!ent.

>ected rotary seed.

>ected &eight on bit (?OA).

@ydraulic arrange!ents.

$nticiated &ear rates fro! abrasion and i!act.

%esign focal oints include:

The bit body

Cone configurations

Cutting structures

Metallurgical# tribological# and hydraulic considerations in engineering bit

design solutions. 2

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'.(et)od for si"ulating drilling of roller

cone bits and its a**lication to roller cone bit

design

and *erfor"ance:

A method for simulating the drilling performane of a roller one !it drilling an earth

formation ma" !e used to generate a #isual representation of drilling$ to design roller

one drill !its$ and to optimi%e the drilling performane of a roller one !it. &he

method for generating a #isual representation of a roller one !it drilling earth

formations ontains seleting !it design parameters$ seleting drilling parameters$ and

seleting an earth formation to !e drilled. &he method further inludes alulating$

from the !it design parameters$ drilling parameters and earth formation$ parameters of

a rater formed 'hen one of a pluralit" of utting elements ontats the earth

formation. &he method further inludes alulating a !ottom hole geometr"$ 'herein

the rater is remo#ed from a !ottom hole surfae. &he method also inludes

inrementall" rotating the !it and repeating the alulating of rater parameters and

!ottom hole geometr" !ased on alulated roller one rotation speed and geometrial

loation 'ith respet to rotation of said roller one drill !it a!out its a(is. &he method

also inludes on#erting the rater and !ottom hole geometr" parameters into

a .*uang" et "a; Mar %2; %440))

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+. Roller cone bit ,it) *ositie and negatie

oset and s"oot) running conguration:

An earth-!oring !it has a !it !od" and at least a pair of antile#ered !earing shafts

depending do'n'ardl" and in'ardl" therefrom. A first utter is mounted for rotation

on one of the !earing shafts and has a region of ontat 'ith the side'all of the

!orehole. A seond utter is mounted for rotation on another of the !earing shafts and

has a region of ontat 'ith the side'all of the !orehole that is non-opposite that of

the first utter. *ta!ili%ation is pro#ided !" a sta!ili%er pad arried on the !it !od" and

arranged to !e opposite the ontat regions of the first and seond utters.

+Matte5 R" (sbell"et"al; Dec %); &22+)

.

19
https://www.google.com/search?tbo=p&tbm=pts&hl=en&q=ininventor:%22Matthew+R.+Isbell%22https://www.google.com/search?tbo=p&tbm=pts&hl=en&q=ininventor:%22Matthew+R.+Isbell%22https://www.google.com/search?tbo=p&tbm=pts&hl=en&q=ininventor:%22Matthew+R.+Isbell%22


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/. 0actors Aecting Torue for a Roller Cone

!it:

!e tor7ue re7uired to rotate a roller cone bit is of interest for

several reasons" First; it may give information about te formation

being drilled and te condition of te bit" Second; bit tor7ue e9erts a

signi$cant in=uence on te Hbit 5al!"M" Iarren; September &2/)?

20
https://www.onepetro.org/search?q=dc_creator%3A(%22Warren%2C+T.M.%22)https://www.onepetro.org/search?q=dc_creator%3A(%22Warren%2C+T.M.%22)


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1.Conclusion:

During tis report ( claim tat te body of te roller cone bit ave a

concave sides and roller is te best type of te bit because 5e can

used in every formation.

Roller cone bit ave tree cones and t5o cone but tree cones are

better because it as more rate of penetration; better gauge ole

and more oil is distributed.

And ( claim tat te seal system tat is a part of bearing system

classify as static and dynamic and roller use bot of tem ;also te

design of roller important and done for lo5 coast and 5e can use

I1 on it and so on.

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11.References:

&-Scolar >%4&0? @onlineAvailable:

ttps:CCscolar"google"comCscolarJ

7KRollerL.oneLbitbtnNKlKenasOsdtK4%.0

2-Petro5i


23/23

Publiser: >ear 5ater 1eac; Florida?

5-guyen;#>&22'?;oil and gas $eld development tecnical)

Publiser: >Editions !ecnic; Paris?

6-1urinte%4&0?@onlineAvailable:

ttp:CCburinte

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