S

EEEmmmaaaiii lll : lxmiu

CCCEEEMMMEEENNNTTTIIINNNGGG AAAIIIDDDSS

7, 7k 10D, 11B

FOR MORE INFORMATION PLEASE CONTACT :

LLLLLLLLLLLLAAAAAAAAAAAAXXXXXXXXXXXXMMMMMMMMMMMMIIIIIIIIIIII UUUUUUUUUUUUDDDDDDDDDDDDYYYYYYYYYYYYOOOOOOOOOOOOGGGGGGGGGGGG (Prop. Laxmi Drilling Rig Equipment Pvt. Ltd.)

222 222 --- 222 333 III nnn ddd uuu sss ttt rrr iii aaa lll AAA rrr eee aaa ,,, JJJ ooo ddd hhh ppp uuu rrr ((( RRR aaa jjj ... ))) III NNN DDD III AAA

dog@ndf.vsnl.net.in FFFaaaxxx : 0091-291-742596 TTTeeelll : 0091-291-740745,741720

111... FFFLLLUUUIIIDDD EEENNNDDD PPPAAARRR

Cylinder LiPiston RodValve AsslPiston Bod

222... DDDRRRIIILLLLLLIIINNNGGG RRRIIIGGG CCC

Rotary Subst

* Cross Ove* Drill Collar* Bit Subs * Tool Joint * Swivel Sub

Short LengthShort LengthWash Pipes f

333... CCCEEEMMMEEENNNTTTIIINNNGGG AAAIIIDDD

Non-Weld & WNon-Weld & Non-Weld & Non-Weld & Spiral Rigid CScratchers Stop Collars,

444... WWWEEELLLLLL PPPRRROOODDDUUUCCCTTT

Sucker Rods

Couplings Hammer Unio Tubing Tong Sucker Rod E Pumping Tee

LLLIIISSSTTT OOOFFF PPPRRROOODDDUUUCCCTTTSSS

TTTSSS OOOFFF MMMUUUDDD///SSSLLLUUUSSSHHH PPPUUUMMMPPPSSS (((VVVAAARRRIIIOOOUUUSSS MMMAAAKKKEEE)))

ners Plungers s Liner Wear Plate

ys. Extension Rods y

OOOMMMPPPOOONNNEEENNNTTTSSS

itutes

rs * Kelly Saver Subs Subs * Throw away Subs * Junk Subs Subs * Bent Subs s

Drill Collars Kellys (upto 20’) or Rotary Swivels

SSS

elded Straight Bow Centralizers Welded Positive Centralizers Welded Spiral Centralizers Welded Turbolizers entralizers

Design as per requirement of the customers

IIIOOONNN CCCOOOMMMPPPOOONNNEEENNNTTTSSS

/Pony Rods Sucker Rod Wrench Casing Scrapers ns Chickson Joints & Swivels

s Tong dies & Inserts levator Polished Rod Clamps

S

⇒ NON – WELD STRAIGH⇒ NON – WELD POSITIVE⇒ TURBOLIZERS ⇒ STOP COLLARS (LOCK⇒ SCRATCHERS ⇒ WELDED SPIRAL CENT⇒ WELDED SPRING BOW⇒ WELDED POSITIVE CEN⇒ TUBING CENTRALIZER⇒ SPIRAL RIGID CENTRA

In order to centre the caannular, cementing spacimportant cementing aidchannelling and ensures c LU-Casing Centralizers arThese are best designed centralizers assures that hole direction or irregularitcentering down the hole. LU-Centralizers bear A.P.I

CCCAAASSSIIINNNGGG CCCEEENNNTTTRRRAAALLLIIIZZZ

CCCEEEMMMEEENNNTTTIIINNNGGG AAAIIIDDDSS

T BOW CENTRALIZERS CENTRALIZERS

RINGS)

RALIZERS CENTRALIZERS TRALIZERS

S LIZERS

sing at pre-selected points and to obtain a more uniform,e in the oil well, straight casing centralizer is one of the used. Besided, it helps in minimising the hazards oforrect installation of the casing pipe in the well.

e non-weld with hinges and lips kept integral with the collars.to have their versatile applications. The construction of the

hinges will not open while casing is being run regardless ofies in formations and that the Centralizer will provide effective

. Monogram on account of their consitant product quality.

EEERRRSSS

SSSPPPRRRIIINNNGGG BBBOOOWWWSSS

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.

TTTUUURRRBBBOOOLLLIIIZZZEEERRRSSS

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.

DDDooouuubbbllleee TTTuuurrrbbbiiinnneee VVVaaannneeesss TTTuuurrrbbbooollliiizzzeeerrr 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 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. PPPooosssiiitttiiivvveee CCCaaasssiiinnnggg CCCeeennntttrrraaallliiizzzeeerrrsss

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

! Welded Centralizer

!!!! Spiral Centralizer

Semi Rigid Centralizers """"

SSSTTTOOOPPP CCCOOOLLLLLLAAARRR 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.

SSSCCCRRRAAATTTCCCHHHEEERRR Successful primary cementing requirescentering of the casing, casing movement,and a properly conditioned hole. LaxmiScratchers condition the hole by removingmud cake from the face of formation toensure a good cementing bound and toprevent channeling. They also contribute tothe even distribution of the cement slurry andthe achievement of a complete fill A. Reciprocating Scratchers These are constructed to withstand anytreatment from the casing rack to the bottomof the well without impairing theireffectiveness. The high strength wire fingersand cable loops distintegrate the toughestfilter cake and their working diameter enablesthem to reach into enlarged scale sections toagitate gelled mud and to make possible acomplete cement fill. B. Rotating Scratchers These consists of a split collar which housesdouble coiled external and internal bristles.The external bristle system is inclined 200 andis shielded by slight elevations in the collar.The inclination of these bristles reduces theabrasive action when casing is run into thehole. The bristles are placed in a new positionrelative to the bore hole wall at each changeof direction while moving pipe, thus assuring thecleaning of the entire circumference of the casingand the well bore. The internal bristles serve to remove millscale and other foreign matter from thecasing, improving the bounding of cement tothe casing.

Table giving the maximum O.D. and Compressed O.D. of the LU-Centralizer with various bows

Size of Centralizer

In inches Bow type Maximum O.D. in

Inches *compressed 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

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.

Welded hinge type centralizer

IIINNNSSSTTTAAALLLAAATTTIIIOOONNN OOOFFF CCCEEENNNTTTRRRAAALLLIIIZZZEEERRRSSS LU-Centralizers can be installed very convenientlyand quickly on the casing pipe by merely wrappingthe pre-assembled two halves on the pipe andinserting pins in the collar hinges. Salient Features/Advantages of LU-Centralizers 1. Quality Steel, unique design, workmanship

and rigid inspection ensures its versatileapplication, easy assembly and quickinstallation.

2. Special heat treatment of Spring Bows

provides required centering force for casing. 3. Mets A.P.I. Specification and bears A.P.I.

monogram. 4. Choice of Bow height can meet all

Centralizer-Hole size combination with therequired starting and restoring force.

5. The Centralizer provides maximum effective

centralising of casing with minimumobstruction to annular flow.

6. Less space required for packing & storing.