B E T T E R W A Y S T O T H E B O T T O M ™
Bulletin 30000e
T E S C O C A S I N G D R I L L I N G ®Reach your reservoir with more efficiency and flexibility.
P A G E 2
1
11
12
15
16 17
18
19
20
21
22
23
24
25
26
27
29 30
31
32
33
34
35
36
14
7
9
SOUTH AMERICA
4
5
6
Houston, Texas
Bryan, Texas
Kilgore,Texas
Springtown, Texas
Conway, Arkansas
Grand Junction, Colorado
Calgary, Alberta
1
2
3
NORTH AMERICA EUROPE26
27
28
Aberdeen, U.K.
Stavanger, Norway
Bergen, Norway
ASIA31
32
33
34
Moscow, Russia
Beijing, China
Singapore
Jakarta, Indonesia
AUSTRALIA35
36
Perth, Australia
Te Puke, New Zealand
MIDDLE EAST29
30
Doha, Qatar
Dubai, United Arab Emerites
Quito, Equador
Bogota, Columbia
Maracaibo, Venezuela
El Tigre, Venezuela
Moroso, Brazil
Maceió, Brazil
15
16
17
18
14
19
20
21
22
23
24
25
Sao Mateus, Brazil
Rio de Janeiro, Brazil
Salta, Argentina
Buenos Aires, Argentina
Neuguen, Argentina
Rio Gallegos, Argentina
13
28
7
8
810
Grande Prairie, Alberta
Nisku, Alberta
Red Deer, Alberta
Reynosa, Mexico
Villahermosa, Mexico
Ciudad del Carmen, Mexico
9
10
11
12
13
342
56
Wherever You’re Working, TESCO CASING DRILLING® Works Better
CASING DRILLING™ is ready to go – right out of the box – when and where you
need it. Anywhere in the world.
Borehole problems can occur anytime, anywhere. CASING DRILLING delivers
all of the functionality of conventional drillpipe drilling, with greater effi ciencies
and improved safety.
Specialized TESCO technicians deploy this time-tested, proven process for
customers in virtually every producing region, backed by the resources of a global
organization. In-depth CASING DRILLING expertise and equipment are at hand
when you need to reach bottom.
The Proof is in The Drilling
CASING DRILLING is innovation in action – technology that
gets casing to bottom by circulating, reciprocating and rotating
simultaneously. Every well is drilled and cased at the same time.
By using the full capabilities of your rig’s top drive, the system
is the solution: CASING DRILLING is a proven process after millions
of feet drilled, on- and off shore, straight, directional and horizontal
wells.
Because of its application fl exibility, CASING DRILLING can
successfully execute anything that can be accomplished with
conventional drilling, while delivering operating and labor cost
savings, capital investment reductions and faster time-to-targets.
With CASING DRILLING, casing is always on bottom, letting
you change your bottom hole assembly (BHA) without a trip.
The process requires less drilling fl uid, further reducing costs and
environmental impact: the mechanical characteristics of the casing
plaster cuttings into the face of the bore hole, sealing pores in the
formation that contribute to lost circulation.
Directional and horizontal applications have been proven
on- and off shore. Directional CASING DRILLING has been used
successfully in diffi cult shales in North America; in completing
complex 3D North Sea wells; and in drilling extended reach wells
– further examples of the fl exibility and adaptability of CASING
DRILLING in a wide variety of hole angles, with on-bottom ROPs
equal to or better than conventional methods.
With the ability to rotate and reciprocate while
circulating fl uid, CASING DRILLING can accomplish
what conventional drilling can – and more.
CASING DRILLING is an engineered solution for diffi cult drilling situations.
With surface rotation rates of 120 rpm for 9 5/8” and 13 3/8“casing, (150
rpm for 7”), casing becomes a very eff ective drill string.
P A G E 3
P A G E 4
reaming shoe to work casing to the bottom. The CDS can rotate and
reciprocate the casing with continual fl uid circulation.
When the goal is to drill an original straight hole, TESCO
professionals replace the reaming shoe with an expendable bit or
drillable casing bit and use either a liner with drillpipe or casing to
drill a new borehole with casing always on bottom.
TESCO has perfected and proven retrievable CASING DRILLING
systems. Drillpipe or wireline can be deployed for multiple bit runs in
applications where either straight or directional/steerable wells are
required or straight holes that requires multiple bit changes.
The exclusive TESCO Drill Lock Assembly (DLA), used as a
part of the BHA, plays a key role in the retrieval of tools from the
bottom. When setting the DLA, tools are run in either on drillpipe
or wireline. Stop dogs locate the BHA and create a landing and lock
profi le. Once pressure is applied, axial locks are set and the running
tool is released while rotation engages torsional locks. Retrieval
is accomplished using pressure to engage DLA, open bypass and
release axial locks.
CASING DRILLING can be accomplished on nearly any rig with a
top drive. Our tools and people both work toward keeping casing on
bottom throughout the drilling process.
TESCO CASING DRILLING® Scenarios
The simplicity of CASING DRILLING™ is one of the main reasons it is
attractive to many E & P operators. CASING DRILLING requires few
adaptations to a standard drilling rig and in most cases can be accomplished
in just a few hours. Basics include a top drive and TESCO’s Casing Drive
System™ (CDS™) that together serve as the workhorse for CASING DRILLING
operations. Installed just below the top drive the CDS improves operational
effi ciencies through its ability to circulate, rotate and reciprocate the casing
string simultaneously.
Depending on your drilling objective, TESCO has tools, processes and
people to get you to bottom.
Keeping It Simple:TESCO CASING DRILLING Adaptability
Simplicity and adaptability are hallmarks of the proven CASING DRILLING
solution. It requires few adaptations to a standard drilling rig – in most
cases, just a few hours of rig-up time. From basic casing running procedures
to complex drilling scenarios, CASING DRILLING gets the job done with
superior effi ciency.
For example, for simply driving casing to the bottom, CASING DRILLING
requires only a Casing Drive System (CDS) attached to a top drive and a
Drilling Objective Benefi ts Tools # Bit Runs People on Rig Floor
Driving Casing to Bottom. Ability to Pump, Rotate and Work Casing to the Bottom CDS•
Reaming Shoe•
NA 1
Drilling a Straight Hole. CASING DRILLING with a Drillable or Expendable Bit CDS•
Expendable or Drillable Bit•
Liner with Drill Pipe or Casing to •
the Surface While Drilling
One 1
Drilling Straight and Directional or Steerable
Holes. Tools Retrievable with Wireline.
CASING DRILLING with Retrievable BHA CDS•
Drill Lock Assembly•
BHA•
Liner with Casing to the Surface •
While Drilling
Multiple 1
Drilling Straight and Directional or Steerable
Holes. Tools Retrievable with Drill Pipe.
CASING DRILLING with Retrievable BHA CDS•
Drill Lock Assembly•
BHA•
Liner with Casing to the Surface •
While Drilling
Multiple 1
P A G E 5
TESCO’s Casing Drive System™ minimizes
rig personnel, improving productivity
while enhancing work site safety.
P A G E 6
0
2000
4000
6000
8000
10000
12000
Mea
sure
d D
epth
, ft
0 5 10 15 20 25 30 35
Drilling Days
Well 1
Well 2
CASING DRILLING
Set 7”
Set 4-1/2”
Set 7”
Set 7”
Set 5-1/2” liner
Kick
Kick
Conventional Drilling
CASING DRILLING™ expertise and technology together help control
and minimize today’s borehole integrity issues and other drilling
challenges.
When using casing as a drill string, cuttings are smeared into the
wall of the wellbore. This not only results in reduced cuttings at the
surface, it automatically strengthens the wellbore and reduces lost
circulation.
CASING DRILLING signifi cantly reduces lost fl uids due to this
Plastering Eff ect™ (see page 7) and enhances reservoir productivity
from producing horizons.
Improved well control is enhanced with continuous circulation
even when tripping. Having casing constantly on the bottom
reduces well kicks creating a safer environment.
The CASING DRILLING process increases safety because it
requires fewer people on the rig fl oor and less pipe handling than
conventional drilling. It also minimizes or eliminates unscheduled
events which lead to tripping the drill-string, kicks, casing wear, and
unintentional sidetracks.
CASING DRILLING design provides superior strength and rigidity
in drilling operations. It has proven capable of withstanding
dynamic downhole loads while maintaining standoff under
large side forces without crushing. Underbalanced drilling, well
completions and other operations can be executed without killing
the well to trip pipe.
Paired with the appropriate TESCO top drive, CASING DRILLING
also maximizes the effi ciency of horizontal drilling operations –
further evidence of the system’s adaptability from top to bottom.
Lost circulation resulted in two unsuccessful attempts to reach
bottom using conventional drilling methods. The CASING
DRILLING process, used in the third attempt, encountered no
lost circulation and delivered a viable wellbore to the operator
when drill pipe drilling could not.
CASING DRILLING has been proven to reduce NPT while
improving drilling effi ciencies. Lost circulation, stuck
pipe, kicks and sloughing shale are all minimized by
CASING DRILLING.
Delivering Under Pressure: TESCO CASING DRILLING® Top to Bottom
P A G E 7
Reducing Non-Productive Time
An added benefi t of the CASING DRILLING process is the Plastering Eff ect,
or smearing, caused by continuous trowelling of the wellbore wall by the
casing. Filter cake is smeared into the wall and is not scraped off by bit
passage or tool joint impacts. Cuttings are ground up more fi nely.
Generally, fewer cuttings return to the surface; instead they are smeared
into the wall, further strengthening the wellbore which off ers the additional
benefi t of improved well control and stability.
Circulation losses are reduced even with higher Equivalent Circulating
Densities (ECD). As demonstrated by the CASING DRILLING process, smearing
has a particularly good eff ect when drilling through medium- and high-
density rock. The Plastering Eff ect coupled with industry best practices leads
to curing lost circulation and enables continuous drilling.
Of all the benefi ts associated with CASING DRILLING – cost savings,
safety, effi ciency – one of the primary benefi ts is this: In many cases, you
can save at least one trip even in zones where lost circulation persists. That
key benefi t alone gives operators a case to consider CASING DRILLING.
CASING DRILLING reduces incremental costs. Many drilling engineers
plan and budget their drilling operations to account for all activities –
positive and negative. If a particular fi eld typically encounters trouble
zones, the drilling engineer will plan and budget for those trouble zones
accordingly. Preventing and recovering from trouble is often anticipated
so as not to show up as an unscheduled event, but as a routine drilling
operation. The routine can add ever-increasing incremental costs to
operators, especially those who are trying to tap even more diffi cult
reservoirs.
Sometimes routine operations are activities, or costs, that could
be eliminated with a diff erent drilling system.
Lost circulation and well control incidents are almost completely
eliminated in wells drilled using CASING DRILLING. Wells that
encounter a weak zone before or after a high-pressure zone while
drilling with drillpipe often fi nd it diffi cult to balance the lost
circulation potential in the in the upper zone with well infl uxes in
the lower zone, particularly when tripping out of the hole with
drill pipe. TESCO encourages operators to drill ahead through lost
circulation when CASING DRILLING. Just as one might plan for a
short trip or a conditioning trip as a “prudent” practice, a certain
amount of time might be budgeted to deal with problems relating to
lost circulation in environments where it is likely to occur. Identifying
these hidden costs can make CASING DRILLING even more attractive
and drilling budgets extend further.
PLASTERING
Casing coupling is forced against
the bore wall as it advances into the
borehole.
As mud is smeared into the formation,
fi lter cake builds up on the borehole
wall.
Filter cake and cuttings are plastered
against the borehole wall by the
coupling, sealing porous formations .
Variations in the straightness of casing smear drill cuttings, sealing pores in formations in what is known as the Plastering Eff ect.
P A G E 8
Wear-resistant Couplings
TESCO produces wear-resistant accessories to protect
casing against excessive abrasions during drilling.
Wear Bands are tungsten carbide coated rings installed
below the coupling to protect the connection. Wear
Sleeves protect the joint from undue wear and prevent
buckling near the bottom of the drill string
Pump Down Displacement PlugTM
TESCO’s Pump Down Displacement Plug (PDDPTM)
is a cementing accessory for use with CASING
DRILLING and Casing Running operations. The PDDP
is pumped behind the cement job to displace the
cement replacing conventional displacement plugs.
It can be pumped down at normal pump rates and
lands in the casing profi le nipple. When landed, the
solid plug holds backpressure preventing backfl ow
and allows operators to continue with minimized risk
of cement U-tubing.
Targeting and Meeting any Objective: TESCO CASING DRILLING® Tools
Almost any on- or off shore drilling rig can be adapted to use the
CASING DRILLING™ technology. Converted conventional rigs lose
none of their capabilities.
Portable TESCO Top Drives can be easily installed on rigs without
top drives. The TESCO Casing Drive System™ (CDS™), integral to
CASING DRILLING, is the industry’s proven workhorse for getting
casing on bottom. The versatility gained by conversion to a dual-
purpose rig makes it suitable for use on a wider range of wells and
increases opportunities.
TESCO has a wide range of equipment for the CASING
DRILLING process to meet any drilling challenge. Together with
knowledgeable and experienced TESCO drilling professionals, there’s
no downhole environment off limits – no missed opportunities for
more effi cient, more successful projects.
Multi-Lobe Torque™ (MLT™) Rings
The TESCO MLT ring is a high performance,
low cost connection enhancement that
delivers premium performance to
standard API Casing and Tubing. MLT
rings fi t standard API “off the shelf”
casing and tubing extending the utility
of operator pipe inventories. They are
particularly eff ective when used on problem
wellbores with a top drive and CDS. Installation is fast and easy and can
be done at well-site, pipe yard or mill. MLT rings are compatible with
full API make-up tolerances through a unique gauging system and a
selection of ring heights specifi c to the size and weight of the tubing
or casing. Substantial connection torque capacity improvement can be
realized with this technology
Underreamer
Directional Tools
Torque Locks
Drill Lock Assembly
ToolLocator
Axial Locks
Bit
P A G E 9
Hydro-Form™ Centralizers and Stabilizers
Hydro-Form Centralizers are used in the casing string to facilitate improved
cementing. Stabilizers are used at the bottom of a “drill-in” CASING DRILLING
string to stabilize the BHA (Bottom Hole Assembly). TESCO’s patented
design and attachment method provides superior strength and rigidity
capable of withstanding dynamic downhole
loads while maintaining standoff under large
side forces without crushing. TESCO’s Centralizers
and Stabilizers provide positive centralization
for cementing in vertical and deviated wells
for both CASING DRILLING and Casing Running
applications. These accessories facilitate rotation
of the casing string, a signifi cant advantage for
cementing operations.
Warthog™
The TESCO Warthog, our exemplary Casing Running and
Reaming Tool (CRRT), helps get your casing to TD despite
compromising hole conditions such as bridges, ledges,
doglegs, sloughing formations and deviated holes. The
Warthog combines hydraulic and mechanical energy to break
through downhole obstructions and a nosecone profi le that
cleans and circulates simultaneously. Three spiral helix external blades help
condition the hole and provide centralization for cementing.
ORB™ - Once Retrievable Bit
The ORB is TESCO’s one-trip drill shoe for vertical or tangent
intervals. The cutting structure is inserted into the drill shoe at
the surface level. UR arms, pilot bit and the center portion of
the ORB bit are retrieved with wireline once TD is reached.
TesTORK™ Torque Monitoring Service
The TesTORK Torque Monitoring Service gives TESCO clients an easy method
for monitoring connection assembly torques and provides an audit trail
for connection make-up. The portable, robust system is easily set-up and
confi gured. Torque calibration occurs at the rig fl oor and at the connection
level and can be done in a matter of minutes. Run by a single operator,
TesTORK keeps a tally of casing and an accurate diary of make-up events.
TesTORK insures data integrity, security and reports in metric and SI units.
P A G E 1 0
Setting New Standards With Standard Technologies
Wherever you drill for oil and gas, TESCO CASING DRILLING® has
been proven in vertical and directional applications with virtually
every standard technology used today.
From Rotary Steerable applications to logging and measurement
while drilling (LWD/MWD), to coring, the CASING DRILLING™
solution delivers superior results.
The CASING DRILLING process has been used to successfully •
complete hundreds of wells: vertical, directional and horizontal.
CASING DRILLING has proven itself an exceptionally viable •
drill string tubular, capable of drilling build rates of up to 13º per
hundred feet while maintaining a better ability to keep on the
well path.
The process is successfully operated onshore and off shore, •
including off shore wells with 70+º holes at over 12,000 feet,
using LWD/MWD with mud motors and rotary steerable
systems.
Far more than a shallow well technology, TESCO has used •
CASING DRILLING for its customers at 1,000-foot depths and up
to 15,500 feet of hole.
The process works with conventional rigs, delivering CASING •
DRILLING benefi ts with minimal rig modifi cations.
Wells drilled with CASING DRILLING can be readily logged via •
conventional wireline, cased hole and LWD methods.
CASING DRILLING virtually eliminates loss circulation. Its proven •
“Plastering Eff ect” enhances reservoir productivity by reducing or
eliminating fl uid losses to the producing horizon.
Core samples are collected through conventional core barrel •
attached to the DLA: core samples are retrieved more quickly and
safely by retrieving the DLA.
With hundreds of intervals and millions of feet of hole,
proven in vertical, horizontal and under-balanced wells,
on and off shore, and in more than 30 geological basins
around the world, CASING DRILLING is changing how wells
are drilled.
Changing The Way – Leading The Way
Speed, safety and effi ciency are equally critical when it comes to
drilling eff ectiveness – and getting you to TD every time.
At TESCO, our people work closely with one another and
with our customers to provide innovative, cost-saving and
environmentally friendly drilling technology and services that
get you to bottom...right out of the box.
Drilling is more than just our passion. It’s in our blood. So it
should be no surprise that when it comes to innovative drilling
technology, TESCO continues to lead the way to improving
drilling effi ciency and Better Ways to The Bottom™ around the
world.
To learn more about TESCO, visit us at www.tescocorp.com.
Tesco Corporation is an industry leader in the development
and commercialization of drilling technology and services. The
Corporation’s mission is to change the way wells are drilled. By
reducing drilling risk and increasing operational effi ciency, TESCO
generates real value for its customers. TESCO’s powerful combination
of engineering and service excellence is provided by experienced and
dedicated fi eld personnel. Coupled with a passion for innovation,
TESCO off ers a comprehensive toolbox of proven technologies and
delivers superior solutions at the wellbore. With a vision spanning
the crown to the bit, from the desert to deepwater, around the world
TESCO technology provides Better Ways to The BottomTM.
Corporate Headquarters
3993 W. Sam Houston Parkway N.
Suite 100
Houston, Texas 77043 USA
Tel: 713-359-7000
Fax: 713-359-7001
Email: [email protected]
www.tescocorp.com
TESCO®, TESCO CASING DRILLING®, CASING DRILLING™,
Casing Drive System™, CDS™, MCLRS™, PDDP™, MLT™,
Markfree™, Warthog™, TESCO TUBULAR SERVICES™, ULTREX™,
Hydro-Form™, TesTORK™ and Better Ways to The Bottom™ are
trademarks of Tesco Corporation.
© Tesco Corporation/ April 2008/ POD/ All rights reserved