Title of Invention	A DEVICE OF INDEPENDENT ROTARY DRIVE (IRD) SYSTEM FOR SKYTOP MODEL MAST & SUBSTRUCTURE
Abstract	In order to install IRD system in skytop type mast and substructure, the substructure configure was redesigned keeping the mast identical to accommodate the single skid IRD system. The whole structure was analysed on STAAD S/W and integrity of mast and substructure was checked. A single skid independent Rotary drive (Single speed. Horizontal split gearbox) was developed to suit this redesigned skytop model Mast and substructure. It consist of a Motor coupled with a single speed reduction gear box which is connected to rotary through chain coupling. All the three are mounted on a single skid thereby avoiding dismantling and assembly of different components during every rig move.

Title of Invention

A DEVICE OF INDEPENDENT ROTARY DRIVE (IRD) SYSTEM FOR SKYTOP MODEL MAST & SUBSTRUCTURE

Abstract

In order to install IRD system in skytop type mast and substructure, the substructure configure was redesigned keeping the mast identical to accommodate the single skid IRD system. The whole structure was analysed on STAAD S/W and integrity of mast and substructure was checked. A single skid independent Rotary drive (Single speed. Horizontal split gearbox) was developed to suit this redesigned skytop model Mast and substructure. It consist of a Motor coupled with a single speed reduction gear box which is connected to rotary through chain coupling. All the three are mounted on a single skid thereby avoiding dismantling and assembly of different components during every rig move.

Full Text	2 FIELD OF THE INVENTION The invention relates to a device of Independent Rotary drive system (IRD) for sky top model mast and substructure to reduce wear and tear of draw works. BACLKGROUND OF THE INVENTION In oil rigging operation, generally the draw works power is used for supporting the drill pipe and also giving the torques to the drilling stem is provided by a rotary table that gets drives from draw works. This has a disadvantage as the draw works has to run all through the drilling operation there by the life of the bearing, shafts and other supporting equipment gets drastically reduced. To overcome this practical operational hazard; an independent rotary drive (IRD) system is being developed and installed in branham type of mast and substructure. This IRD system can not be installed in sky top type of mast and substructure due to limitation of working space between welll center and the mast. Hence, a device of an Independent Rotary Drive system for sky top type of mast and substructure was developed to address the above problem to reduce wear and tear of draw works. 3 OBJECTS OF THE INVENTION It is therefore, an object of the present invention to propose a device of inpendent rotary drive system for sky top model mast and substructure which eliminates the disadvantages of prior Art. Another object of the present invention is to propose a device of Independent Rotary Drive System for sky top model mast and substructure which constitutes an integrated assemble of independent rotary Drive System to generate torque to drill stem. A further object of the present invention is to propose a device of independent rotary drive system for sky top model mask and substructure which increased the life of the bearing, shafts and other supporting equipments. SUMMARY OF THE INVENTION In order to install IRD system in skytop type mast and substructure, the substructure configure was redesigned keeping the mast identical to accommodate the single skid IRD system. The whole structure was analysed on STAAD S/W and integrity of mast and substructure was checked. A single skid independent Rotary drive (Single speed. Horizontal split gearbox) was developed to suit this redesigned skytop model Mast and substructure. It consist of a Motor coupled with a single speed reduction gear box which is connected to rotary through chain coupling. All the three are mounted on a single skid thereby avoiding dismantling and assembly of different components during every rig move. 4 BRIEF DESCRIPTION OF THE DRAWING Fig - 1 - shows a schematic diagram of a device including the drill floor plan of the redesigned drilling rig for drilling loads and to accommodate IRD unit Fig - 2 - shows a schematic diagram of device including the single skid independent rotary system for skytop type mast and substructure. Fig - 3 - shows a schematic diagram of drill floor of original substructure of skytop type RIG (Prior Art) DETAILS DESCRIPTION OF THE PREFERRED ENBODIMENT OF THE INVENTION As shown in Fig - 1 A drill floor plan of redesigned drill rig for supporting the drilling machinery and drilling loads and to accommodate IRD unit comprising a set back speader (1), it transfers set back load of 250 Ton to the ground through the casing set back columns. In order to accommodate the IRD (2) unit, the front beam (A) of set back was redesigned considering of the load capacity; it also provides a front floor support Box (3) which is a critical component of substructure which transfers set back load and loads from A frame to the ground through columns. The inside beam (B) was connected to strong back beam in prior art. For installation of IRD unit. Supporting beam (B) and supporting sheave (C) was modified. The assembly also provides a Rotary Beam (4) which accommodates a Rotary table, being a rugged machine to rotate drill stem and supports its weight. This also transfers horizontal loads of set back to strong back beam (6). This was also redesigned to accommodate IRD unit. 5 A Rotary floor spreader (5) (off driller side) which gives support to rotary floor and also takes IRD unit load by proper setting of position. The assembly also includes a strong back beam (6) which is main component of substructure which transfers casing loads, draw work's load and lateral loads of set back and Draw works. Present invention modified this beam to suit redesign rotary beam, front floor support box and rotary spreader. As shown in Fig - 2, the assembly comprising a IRD skid (7) which is a rugged structure to support Rotary table (8) and IRD component like gearbox (9) motor (10) clutch (11) and brake (12). The IRD components comprises a motor (10) which is an independent motor (10) which gives the drilling torque to rotary through gearbox (9). The gear box (9) having a single speed reduction gear which increases to drilling torque by reducing the drilling speed. A flexible coupling (12) transfer the drives from motor (10) to gear box (9). A chain coupling (13) is attached to the gear box (9), transfer the drive from gear box (9) to rotary (14). In case of failure of IRD unit, it transfer drive drawn from draw works to rotary table through an emergency sprocket. An Air flex clutch (11) is also attached in is conjunction of motor and motor coupling adapter which is a balloon type air operated brake to stop IRD system. 6 WE CLAIM 1. A device of Impendent Rotary Drive (IRD) system for skytop model mast and substructure, the rotary Drive system comprising:- - atleast one independent motor (10) which gives the drilling torque to rotary through a single speed reduction gear (9) which increases drilling torque by reducing the drilling speed; atleast one flexible coupling (12) attached in junction of motor coupling adapter and gear box input shaft which transfer the drive from motor to gear box; - atleast one chain couplings (13) attached in junction of gearbox input shaft and rotary pinion shaft which transfer the drive from gear box to rotary table; - atleast one Rotary table disposed on the rugged structure and - atleast one rotary brake (12) to control the rotation of table (8). 2. The device of independent Rotary drive system for skytop model mast and the substructure configured there in comprising :- - atleast on set back spreader (1) which transfers set back load to the ground through casing set back columns and accommodates IRD system (2), 7 - atlest one front floor support box which transfer set back load and loads from A frame to the ground through columns and also connected with bean (B)and support sheave (C); - a plurality of rotary beam (4) which accommodates rotary table and is a rugged machine to rotate drill stem supports its weight; - atleast one rotary floor spreader (5) which gives support to rotary floor and also takes IRD unit (1) load and - atleast one strong back beam (6) which transfer casing load, draw work's load and lateral loads of set back and draw works. In order to install IRD system in skytop type mast and substructure, the substructure configure was redesigned keeping the mast identical to accommodate the single skid IRD system. The whole structure was analysed on STAAD S/W and integrity of mast and substructure was checked. A single skid independent Rotary drive (Single speed. Horizontal split gearbox) was developed to suit this redesigned skytop model Mast and substructure. It consist of a Motor coupled with a single speed reduction gear box which is connected to rotary through chain coupling. All the three are mounted on a single skid thereby avoiding dismantling and assembly of different components during every rig move.

Full Text

2
FIELD OF THE INVENTION
The invention relates to a device of Independent Rotary drive system (IRD) for
sky top model mast and substructure to reduce wear and tear of draw works.
BACLKGROUND OF THE INVENTION
In oil rigging operation, generally the draw works power is used for supporting
the drill pipe and also giving the torques to the drilling stem is provided by a
rotary table that gets drives from draw works. This has a disadvantage as the
draw works has to run all through the drilling operation there by the life of the
bearing, shafts and other supporting equipment gets drastically reduced.
To overcome this practical operational hazard; an independent rotary drive (IRD)
system is being developed and installed in branham type of mast and
substructure.
This IRD system can not be installed in sky top type of mast and substructure
due to limitation of working space between welll center and the mast.
Hence, a device of an Independent Rotary Drive system for sky top type of mast
and substructure was developed to address the above problem to reduce wear
and tear of draw works.

3
OBJECTS OF THE INVENTION
It is therefore, an object of the present invention to propose a device of
inpendent rotary drive system for sky top model mast and substructure which
eliminates the disadvantages of prior Art.
Another object of the present invention is to propose a device of Independent
Rotary Drive System for sky top model mast and substructure which constitutes
an integrated assemble of independent rotary Drive System to generate torque
to drill stem.
A further object of the present invention is to propose a device of independent
rotary drive system for sky top model mask and substructure which increased
the life of the bearing, shafts and other supporting equipments.
SUMMARY OF THE INVENTION
In order to install IRD system in skytop type mast and substructure, the
substructure configure was redesigned keeping the mast identical to
accommodate the single skid IRD system. The whole structure was analysed on
STAAD S/W and integrity of mast and substructure was checked. A single skid
independent Rotary drive (Single speed. Horizontal split gearbox) was developed
to suit this redesigned skytop model Mast and substructure. It consist of a Motor
coupled with a single speed reduction gear box which is connected to rotary
through chain coupling. All the three are mounted on a single skid thereby
avoiding dismantling and assembly of different components during every rig
move.

4
BRIEF DESCRIPTION OF THE DRAWING
Fig - 1 - shows a schematic diagram of a device including the drill floor plan of
the redesigned drilling rig for drilling loads and to accommodate IRD unit
Fig - 2 - shows a schematic diagram of device including the single skid
independent rotary system for skytop type mast and substructure.
Fig - 3 - shows a schematic diagram of drill floor of original substructure of
skytop type RIG (Prior Art)
DETAILS DESCRIPTION OF THE PREFERRED ENBODIMENT OF THE
INVENTION
As shown in Fig - 1 A drill floor plan of redesigned drill rig for supporting the
drilling machinery and drilling loads and to accommodate IRD unit comprising a
set back speader (1), it transfers set back load of 250 Ton to the ground through
the casing set back columns. In order to accommodate the IRD (2) unit, the
front beam (A) of set back was redesigned considering of the load capacity; it
also provides a front floor support Box (3) which is a critical component of
substructure which transfers set back load and loads from A frame to the ground
through columns. The inside beam (B) was connected to strong back beam in
prior art. For installation of IRD unit. Supporting beam (B) and supporting
sheave (C) was modified.
The assembly also provides a Rotary Beam (4) which accommodates a Rotary
table, being a rugged machine to rotate drill stem and supports its weight. This
also transfers horizontal loads of set back to strong back beam (6). This was
also redesigned to accommodate IRD unit.

5
A Rotary floor spreader (5) (off driller side) which gives support to rotary floor
and also takes IRD unit load by proper setting of position.
The assembly also includes a strong back beam (6) which is main component of
substructure which transfers casing loads, draw work's load and lateral loads of
set back and Draw works. Present invention modified this beam to suit redesign
rotary beam, front floor support box and rotary spreader.
As shown in Fig - 2, the assembly comprising a IRD skid (7) which is a rugged
structure to support Rotary table (8) and IRD component like gearbox (9) motor
(10) clutch (11) and brake (12). The IRD components comprises a motor (10)
which is an independent motor (10) which gives the drilling torque to rotary
through gearbox (9). The gear box (9) having a single speed reduction gear
which increases to drilling torque by reducing the drilling speed. A flexible
coupling (12) transfer the drives from motor (10) to gear box (9). A chain
coupling (13) is attached to the gear box (9), transfer the drive from gear box
(9) to rotary (14). In case of failure of IRD unit, it transfer drive drawn from
draw works to rotary table through an emergency sprocket. An Air flex clutch
(11) is also attached in is conjunction of motor and motor coupling adapter
which is a balloon type air operated brake to stop IRD system.

6
WE CLAIM
1. A device of Impendent Rotary Drive (IRD) system for skytop model mast
and substructure, the rotary Drive system comprising:-
- atleast one independent motor (10) which gives the drilling
torque to rotary through a single speed reduction gear (9) which
increases drilling torque by reducing the drilling speed;
atleast one flexible coupling (12) attached in junction of motor
coupling adapter and gear box input shaft which transfer the
drive from motor to gear box;
- atleast one chain couplings (13) attached in junction of gearbox
input shaft and rotary pinion shaft which transfer the drive from
gear box to rotary table;
- atleast one Rotary table disposed on the rugged structure and
- atleast one rotary brake (12) to control the rotation of table (8).
2. The device of independent Rotary drive system for skytop model mast
and the substructure configured there in comprising :-
- atleast on set back spreader (1) which transfers set back load to
the ground through casing set back columns and accommodates
IRD system (2),

7
- atlest one front floor support box which transfer set back load and
loads from A frame to the ground through columns and also
connected with bean (B)and support sheave (C);
- a plurality of rotary beam (4) which accommodates rotary table
and is a rugged machine to rotate drill stem supports its weight;
- atleast one rotary floor spreader (5) which gives support to
rotary floor and also takes IRD unit (1) load and
- atleast one strong back beam (6) which transfer casing load,
draw work's load and lateral loads of set back and draw works.

In order to install IRD system in skytop type mast and substructure, the
substructure configure was redesigned keeping the mast identical to
accommodate the single skid IRD system. The whole structure was analysed on
STAAD S/W and integrity of mast and substructure was checked. A single skid
independent Rotary drive (Single speed. Horizontal split gearbox) was developed
to suit this redesigned skytop model Mast and substructure. It consist of a Motor
coupled with a single speed reduction gear box which is connected to rotary
through chain coupling. All the three are mounted on a single skid thereby
avoiding dismantling and assembly of different components during every rig
move.

Documents:

01507-kol-2007-abstract.pdf

01507-kol-2007-claims.pdf

01507-kol-2007-correspondence others.pdf

01507-kol-2007-description complete.pdf

01507-kol-2007-drawings.pdf

01507-kol-2007-form 1.pdf

01507-kol-2007-form 2.pdf

01507-kol-2007-form 3.pdf

01507-kol-2007-gpa.pdf

1507 KOL 2007 Search Report .pdf

1507-KOL-2007-(30-05-2013)-ABSTRACT.pdf

1507-KOL-2007-(30-05-2013)-AMANDED CLAIMS.pdf

1507-KOL-2007-(30-05-2013)-AMANDED PAGES OF SPECIFICATION.pdf

1507-KOL-2007-(30-05-2013)-CLAIMS.pdf

1507-KOL-2007-(30-05-2013)-CORRESPONDENCE.pdf

1507-KOL-2007-(30-05-2013)-DESCRIPTION (COMPLETE).pdf

1507-KOL-2007-(30-05-2013)-DRAWINGS.pdf

1507-KOL-2007-(30-05-2013)-FORM-1.pdf

1507-KOL-2007-(30-05-2013)-OTHERS.pdf

1507-KOL-2007-CORRESPONDENCE 1.1.pdf

1507-KOL-2007-CORRESPONDENCE OTHERS 1.1.pdf

1507-KOL-2007-FORM 18.pdf

abstract-01507-kol-2007.jpg

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Patent Number

264083

Indian Patent Application Number

1507/KOL/2007

PG Journal Number

50/2014

Publication Date

12-Dec-2014

Grant Date

04-Dec-2014

Date of Filing

02-Nov-2007

Name of Patentee

BHARAT HEAVY ELECTRICALS LIMITED

Applicant Address

REGIONAL OPERATIONS DIVISION (ROD), PLOT NO : 9/1, DJBLOCK 3RD FLOOR, KARUNAMOYEE, SALT LAKE CITY, KOLKATA-700091 HAVING ITS REGISTERED OFFICE AT BHEL HOUSE, SIRI FORT, NEW DELHI-110049, INDIA.

Inventors:

#	Inventor's Name	Inventor's Address
1	CHEBOLU SREE RAMACHANDRA MURTHY	OIL RIG ENGINEERING, 07 ANNEX, BHEL, R.C. PURAM, HYDERABAD-502032
2	VISWANATHAN SIVARAMAKRISHNAN	OIL RIG ENGINEERING, 07 ANNEX, BHEL, R.C. PURAM, HYDERABAD-502032
3	RAJEEV KUMAR	OIL RIG ENGINEERING, 07 ANNEX, BHEL, R.C. PURAM, HYDERABAD-502032

PCT International Classification Number

E21B 3/02; E21B 19/084; E21B 19/14

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA