1. CEMENTING AIDS
7, 7k 10D, 11B
FOR MORE INFORMATION PLEASE CONTACT :
LAXMI UDYOG
(Prop. Laxmi Drilling Rig Equipment Pvt. Ltd.)
2 2 --2 3 IIn d u s ttrriia ll A rre a ,, J o d h p u rr ((R a jj..)) IIN D IIA
22 23 ndus a A ea Jodhpu Ra ND A
Emaiill : lxmiudog@ndf.vsnl.net.in Fax : 0091-291-742596 Tell : 0091-291-740745,741720
Ema Fax Te

2. LIST OF PRODUCTS
1.. FLUIID END PARTS OF MUD//SLUSH PUMPS ((VARIIOUS MAKE))
1 FLU D END PARTS OF MUD SLUSH PUMPS VAR OUS MAKE
Cylinder Liners Plungers
Piston Rods Liner Wear Plate
Valve Asslys. Extension Rods
Piston Body
2.. DRIILLIING RIIG COMPONENTS
2 DR LL NG R G COMPONENTS
Rotary Substitutes
* Cross Overs * Kelly Saver Subs
* Drill Collar Subs * Throw away Subs
* Bit Subs * Junk Subs
* Tool Joint Subs * Bent Subs
* Swivel Subs
Short Length Drill Collars
Short Length Kellys (upto 20’)
Wash Pipes for Rotary Swivels
3.. CEMENTIING AIIDS
3 CEMENT NG A DS
Non-Weld & Welded Straight Bow Centralizers
Non-Weld & Welded Positive Centralizers
Non-Weld & Welded Spiral Centralizers
Non-Weld & Welded Turbolizers
Spiral Rigid Centralizers
Scratchers
Stop Collars, Design as per requirement of the customers
4.. WELL PRODUCTIION COMPONENTS
4 WELL PRODUCT ON COMPONENTS
Sucker Rods/Pony Rods Sucker Rod Wrench
Couplings Casing Scrapers
Hammer Unions Chickson Joints & Swivels
Tubing Tongs Tong dies & Inserts
Sucker Rod Elevator Polished Rod Clamps
Pumping Tee

3. CEMENTING AIDS
CASIING CENTRALIIZERS
CAS NG CENTRAL ZERS
⇒ NON – WELD STRAIGHT BOW CENTRALIZERS
⇒ NON – WELD POSITIVE CENTRALIZERS
⇒ TURBOLIZERS
⇒ STOP COLLARS (LOCK RINGS)
⇒ SCRATCHERS
⇒ WELDED SPIRAL CENTRALIZERS
⇒ WELDED SPRING BOW CENTRALIZERS
⇒ WELDED POSITIVE CENTRALIZERS
⇒ TUBING CENTRALIZERS
⇒ SPIRAL RIGID CENTRALIZERS
In order to centre the casing at pre-selected points and to obtain a more uniform,
annular, cementing space in the oil well, straight casing centralizer is one of the
important cementing aid used. Besided, it helps in minimising the hazards of
channelling and ensures correct installation of the casing pipe in the well.
LU-Casing Centralizers are non-weld with hinges and lips kept integral with the collars.
These are best designed to have their versatile applications. The construction of the
centralizers assures that hinges will not open while casing is being run regardless of
hole direction or irregularities in formations and that the Centralizer will provide effective
centering down the hole.
LU-Centralizers bear A.P.I. Monogram on account of their consitant product quality.

4. SPRIING BOWS
SPR NG BOWS
The spring bows, the critical parts of the
Centralizer, are made of high quality
special steel strips. These are sheared to
size and normalised to have the proper
grain structure. Bows are forged in four
different unique designs to have varied
heights. These are then hardened and
tempered to ensure optimum mechanical
properties to meet or exceed the
STARTING AND RESTORING FORCD
criteria specified in A.P.I. Standard 10-D.
Bows are then flattended several times on
a special machine tailor made for the
purpose to attain constant height and to
get permanent setting.
TURBOLIIZERS
TURBOL ZERS
Turbolizers are similar to straight casing
Centralizer except that these are having
turbulence vanes fitted on each bow. The
vanes are scientifically shaped into multi
direction design to give the fluid an
outward and spirally direction against the
walls of the well hole and around the
casing. To give them maximum strength,
the vanes are made of spring steel
material and heat-treated to meet the
required mechanical properitie. The
vanes are oriented for left and right hand
deflection.

5. Doublle Turbiine Vanes Turbolliizer
Doub e Turb ne Vanes Turbo zer
! Welded Centralizer
The double turbine vane turbolizers have a
vane attached to each end of each bow. The
vanes at the bottom are oriented in the
opposite direction from those vanes at the
top
Advantages Of Using Turbolizers
Turbolizers are used to generate turbulence
in the fluid rising through the annulus and
also to deflect the flow of fluid. The
turbulence cleans up the annulus,
distributes cement evenly and prevents
channelling to achieve a solid fill. The vanes
! Spiral Centralizer cause axial twist and spiral circulation of the
fluid and cement around the casing as well
as against the walls of the well. The swirling
action so created forces heavier sealing
materials in the circulating fluid into pores
and cracks.
LU-Turbolizers when compressed to their
minimum O.D. in deviated wells, return to
their original size without any distortion to
either bows or vanes.
Posiittiive Casiing Centtralliizers
Pos ve Cas ng Cen ra zers
Semi Rigid Centralizers " These Centralizers are provided with rigid
bows of U-profile design instead of sprig
bows to ensure maximum fluid passage.
These are also non-weld and rugged in
construction. The positive centralizers are
used where casing inside a cased well is
lowered. It keeps the casing centered in the
cased we’ enables proper positioning of
packer and other installations in the casing
and facilitates stage and surface cementing.
It also protects previously run cemented
casing from shocks and vibrations caused
by drilling

6. STOP COLLAR
STOP COLLAR
Stop collar devices are used to limit
the travel of centralizers, turbolizers,
positive centralizers and scratchers
on the casing pipe. These are made
in two designs.
A. Non-Hinged stop collar (a
solid ring with internal
groove duly slotted for
inserting spiral locking pin)
B. Hinged & Bolted stop collar.
Non-Hinged Stop Collar
It is a simple but a unique design-
having an internal groove with two
slots. The spiral locking pins are
driven in both the slots with impact of
a hammer. These spiral pins follow
the groove along the inside of the
collar thereby firmly tightening the
stop collar device in its position.

7. SCRATCHER
SCRATCHER
Successful primary cementing requires
centering of the casing, casing movement,
and a properly conditioned hole. Laxmi
Scratchers condition the hole by removing
mud cake from the face of formation to
ensure a good cementing bound and to
prevent channeling. They also contribute to
the even distribution of the cement slurry and
the achievement of a complete fill
A. Reciprocating Scratchers
These are constructed to withstand any
treatment from the casing rack to the bottom
of the well without impairing their
effectiveness. The high strength wire fingers
and cable loops distintegrate the toughest
filter cake and their working diameter enables
them to reach into enlarged scale sections to
agitate gelled mud and to make possible a
complete cement fill.
B. Rotating Scratchers
These consists of a split collar which houses
double coiled external and internal bristles.
The external bristle system is inclined 200 and
is shielded by slight elevations in the collar.
The inclination of these bristles reduces the
abrasive action when casing is run into the
hole. The bristles are placed in a new position
relative to the bore hole wall at each change
of direction while moving pipe, thus assuring the
cleaning of the entire circumference of the casing
and the well bore.
The internal bristles serve to remove mill
scale and other foreign matter from the
casing, improving the bounding of cement to
the casing.

8. Table giving the maximum O.D. and Compressed O.D. of the LU-Centralizer with various bows
Size of Centralizer Bow type Maximum O.D. in *compressed
In inches Inches O.D. in inches
5 ½” TI 8.1/8 6.5/8
TII 8.5/8 6.3/4
TIII 10.1/8 6.3/4
TIV 11.1/8 6.3/4
TV 12.5/8 6.7/8
6.5/8” TI 9.1/4 7.3/4
TII 9.3/4 7.7/8
TIII 11.1/4 7.7/8
TIV 12.1/4 7.7/8
TV 13.3/4 8
7” TI 9.5/8 8.1/8
TII 10.1/8 8.1/4
TIII 11.5/8 8.1/4
TIV 12.5/8 8.1/4
TV 14.1/8 8.3/8
7.5/8” TI 10.1/4 8.3/4
TII 10.3/4 8.7/8
TIII 12.1/4 8.7/8
TIV 13.1/4 8.7/8
TV 14.3/4 9
8.5/8” TI 11.1/4 9.3/4
TII 11.3/4 9.7/4
TIII 13.1/4 9.7/8
TIV 14.1/4 9.7/8
TV 15.3/4 10
9.5/8” TI 12.1/4 10.3/4
TII 12.3/4 10.7/8
TIII 14.1/4 10.7/8
TIV 15.1/4 10.7/8
TV 16.3/4 11
10.3/4” TI 13.7/16 11.7/8
TII 13.15/16 12
TIII 15.7/16 12
TIV 16.7/16 12
TV 17.15/16 12.1/8

9. 11.3/4” TI 14.7/16 12.7/8
TII 14.15/16 13
TIII 16.7/16 13
TIV 17.7/16 13
TV 18.15/16 13.1/8
13.3/8” TI 16.1/16 14.1/2
TII 16.9/16 14.5/8
TIII 18.1/16 14.5/8
TIV 19.1/16 14.5/8
TV 20.9/16 14.3/4
14.3/4” TI 17.7/16 15.7/8
TII 17.15/16 16
TIII 19.7/16 16
TIV 20.7/16 16
TV 21.15/16 16.1/8
16” TI 18.11/16 17.1/8
TII 19.3/16 17.1/4
TIII 20.11/16 17.1/4
TIV 21.11/16 17.1/4
TV 23.3/16 17.3/8
18.5/8” TI 21.3/8 19.7/8
TII 21.7/8 20
TIII 23.3/8 20
TIV 24.3/8 20
TV 25.7/8 20.1/8
20” TI 22.3/4 21.1/4
TII 23.1/4 21.3/8
TIII 24.3/4 21.3/8
TIV 25.3/4 21.3/8
TV 27.1/4 21.1/2
Note :
1. When the bows are completely defected, these figures represent the largest rigid
diameter of the centralizer. These values could be the bow, centralizer hinge or any
other part of the centralizer.
2. Bow type shall be selected according to required hole size combination.

10. IINSTALATIION OF CENTRALIIZERS
NSTALAT ON OF CENTRAL ZERS
LU-Centralizers can be installed very conveniently
and quickly on the casing pipe by merely wrapping
the pre-assembled two halves on the pipe and
inserting pins in the collar hinges.
Salient Features/Advantages of LU-Centralizers
1. Quality Steel, unique design, workmanship
and rigid inspection ensures its versatile
application, easy assembly and quick
installation.
2. Special heat treatment of Spring Bows
provides required centering force for casing.
3. Mets A.P.I. Specification and bears A.P.I.
Welded hinge type centralizer
monogram.
4. Choice of Bow height can meet all
Centralizer-Hole size combination with the
required starting and restoring force.
5. The Centralizer provides maximum effective
centralising of casing with minimum
obstruction to annular flow.
6. Less space required for packing & storing.