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Strength and flexibility
for all your needs in OCTG and steel

Welcome to ACE O.C.T.G. Ltd – Leading Company of Downhole Drilling Equipments and Raw Material of Oil Steels

About us

ACE O.C.T.G. Ltd is a global supplier of AISI 4145H Mod, AISI 4130, AISI 4140 - L80, AISI 4330 V Mod. and Amagnit 501/601 oil steels and high quality downhole drilling tools to the international Oil & Gas exploration industry, with a large centrally located storage area in the Jebel Ali sea-port free zone, Dubai, United Arab Emirates and stocking facilities located in Houston and Singapore.

The company has been established in 2004 by a group of experienced oilfield operatives and is headquartered in Malta.

Our partnerships

ACE O.C.T.G. Ltd drilling tools are produced and manufactured in full compliance with API SPEC 7-1, NS-1 and DS-1 latest edition, and supplied with mill test certification. Affiliated with reputable steel mills and drilling tool manufacturers in the USA, Europe, the United Arab Emirates and Asia, we are excellently positioned to supply high quality drilling tools and oil steels, with a close attention to customer’s drilling schedules.

We have established a Quality Manual that defines our QA/QC policies, systems, procedures and commitments to apply to our whole supply chain.

ACE O.C.T.G. FZCO (our Dubai Sales Office) is an ISO 9001:2008 facility certified by API.

Products offered

Among the products offered by our company we can list the following:

  • Drill Collars (Slick and Spiral)
  • Heavy Weight Drill Pipes (Integral, Friction Welded and Spiral)
  • Drill Pipes
  • Stabilizer forgings, Milled Blades Stabilizers and Hole Openers
  • Rotary Reamers Forgings
  • Rotary Subs, Lift Subs, Lift Plugs
  • Integral Square and Hexagonal Kellys
  • Non-Magnetic Products (Drill Collars, Flex and Pony Collars, Stabilizers and Subs)
  • Oil steels (AISI 4145H Mod. API 7-1, AISI 4130 API 6 A, AISI 4140 - L80 API Spec. 6A / API Spec. 5CT and NACE MR 0175, AISI 4330 V Mod. ASTM A29, Amagnit 501/601)

Our market

Our market is worldwide, as our customers are located in Asia, Middle East, Europe, Scandinavia, Canada, USA, South America, Australia and New Zealand.

Logistical solutions

With an “in-house” sea-freight and logistical support, we offer accurate and competitive shipping services for the safe deliveries all over the world.

Environmental commitment

ACE O.C.T.G. Ltd recognizes the importance of a corporate environmental policy. We want to work with our suppliers, manufacturers, subcontractors, customers and employees to comply with the day-to-day requirements of environmental good practice.
So we undertake to minimize pollution and waste, and use natural and sustainable products and resources wherever possible.

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Drill Collars

Drill collars are manufactured from AISI 4145H Mod. chromium molybdenum alloy steel. Drill collar bars are full-length uniformly quenched and tempered to obtain API Spec.7-1,
NS-1 and DS-1 properties. Mill test certificates including mechanical properties, chemical analysis and non destructive inspections are supplied with all drill collars.
Mill test certificates guarantee conformance to API Spec. 7-1, NS-1, DS-1 and customer requirements.

Drill collar bars are trepanned and inside diameters are gauged to API Spec. 7-1 specification with a 10ft drift mandrel.
Bar surface finish is hot-rolled and mill-finish for diameter below or equal to 8 1/2 and forged and peeled for diameter above 8 ½.

Connections

All threads are cut with constant profile tools on CNC machines.
API relieve groove pin and bore back box stress relief features are standard.
Thread roots are cold-worked to improve fatigue resistance of the connection.
All connections are phosphatized and coated with API thread compound to prevent corrosion and galling. Standard pressed steel protectors are installed to ensure adequate thread protection.

Spiral Drill Collars

Spiral drill collars are grooved to avoid differential pressure sticking in the hole.
Slip and elevators recesses are machined in accordance with API Spec.7-1 to improve handling efficiency and safety.

* Nota: NS-1 and DS-1 properties and certification are provided on request. Please specify your needs in your enquiry.

On inquiries
and orders
please specify

  • Slick or Spiral type
  • Outside and Inside diameters
  • Length
  • Connection size and type
  • API stress relieve groove on pin and box
  • Special features: slip and/or elevator recesses, hardbanding (band location)
  • Type of thread protector (pressed steel, cast steel or lifting protector)
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Heavy Weight Drill Pipes

Integral Heavy Weight Drill Pipes

Heavy Weight Drill Pipes are machined from 31ft bars of AISI 4145H Mod. alloy steel, full-length quenched and tempered to obtain the API Spec. 7-1, NS-1 and DS-1 mechanical properties. All Heavy Weight Drill Pipe bars are trepanned and inside diameters are gauged to API Spec.7-1 specification, with a 10 ft drifts mandrel.

Welded Heavy Weight Drill Pipes

Welded Heavy Weight Drill Pipes consists of two tool joints and one central tube, assembled by welding. Tool joints are made from AISI 4145H Mod. alloy steel, quenched and tempered to obtain the API Spec. 7-1, NS-1 and DS-1 mechanical properties. Central tube is made from 1340 normalized steel to achieve API Spec.7-1, NS-1 and DS-1 mechanical properties. Each weld zone is fully ultrasonic inspected and hardness tested.

Spiral Heavy Weight Drill Pipes

Heavy Weight Drill Pipes are machined from 31ft bars of AISI 4145H Mod. alloy steel, full-length quenched and tempered to obtain the API Spec.7-1, NS-1 and DS-1 mechanical properties.

QUALITY CONTROL

When delivered each HWDP has been inspected according to API Spec.7-1, NS-1 and DS-1. An inspection certificate is provided including mechanical properties, chemical analysis and inspections.

CONNECTIONS

API relieve groove pin and bore back box stress relief features are standard. Thread roots are cold-worked to improve fatigue resistance of the connection. All connections are phosphatized and coated with API thread compound to prevent corrosion and galling. Standard pressed steel protectors are installed to ensure adequate thread protection.
On request, High Torque connections can be manufactured. Heavy Weight Drill Pipes can also be delivered blank ended.

HARDBANDING

To optimize wear resistance, Hardbanding is standard on tool joints and central upset.

Standard wear bands:

  • One 4” wear pad on pin and box, plus 1” pad on box taper section (optional)
  • Two 3” wear pads on central upsets (optional for Spiral HWDP)
  • Standard hardbanding is raised (1/8” oversize). Flush application available on request (optional)

Type of hardbanding is according to customer’s requirements.

We offer the main following hardbanding types:

  • Fine grain size tungsten carbide particles
  • Duraband NC (Postle Industries)
  • Tuffband NC (Postle Industries)
  • Arnco 100XT
  • Arnco 300XT

Other hardbanding types can be provided, on request.

INTERNAL COATING

Internal coating can be provided on request.

* Nota: NS-1 and DS-1 properties and certification are provided on request. Please specify your needs in your enquiry.

On inquiries
and orders
please specify

  • Type of HWDP
  • Nominal Size
  • OD Tool Joint and Inside diameter
  • Type of hardbanding
  • Internal coating if required
  • Extra-long tool joints available if required
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Drill Pipes

Drill pipes are manufactured from upset pipe body ends and friction welded on tool joints. Tool joints are forged from chromium molybdenum alloy steel and uniformly quenched and tempered to obtain API Spec.7-1 properties.

Pipe body standard grades , covered by API Spec. 5DP/ISO 11961 are:

  • Grade E
  • High-strength grades X, G and S

The type of upset are: EU, IU,IEU

Tool Joints are weld to the pipe body by friction welding. After welding, an area wider than the weld zone to tempering temperature. Each weld is 100% inspected according to API Spec. 5DP.

Drill pipes are also provided with internal coating and the different types of box tool joint hardbanding.

On inquiries
and orders
please specify

  • Quantity
  • Nominal OD
  • Nominal weight, lb/ft
  • Grade
  • Upset type
  • RSC type or other special connections
  • Tool joint outside diameter
  • Tool joint inside diameter at the pin end
  • Length of pin tool joint outside diameter
  • Length of box tool joint outside diameter
  • Hardbanding: type, location, dimensions and acceptance criteria
  • Pipe coatings: internal and/or external (type of coating)
  • Thread protector type
  • Marking requirements
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Stabilizers and Rotary Reamers

Stabilizers and Rotary Reamers are manufactured from forging single piece of AISI 4145H modified alloy steel, full length quenched and tempered to obtain API Spec. 7-1, NS-1 and DS-1 properties.

Ultrasonic inspection and MPI inspections are performed on each forging over its full length and section, after rough machining according to API Spec 7-1, NS-1 and DS-1. Mill test certificates including mechanical properties, chemical analysis and inspections are supplied with all stabilizers.

Stabilzer Forgings, Rough Turned, Standard Size Available from Stock

Forgings for stabilizer up to 36 in. crown OD can be manufactured.

* Nota: NS-1 and DS-1 properties and certification are provided on request. Please specify your needs in your enquiry.

Milled Blade Integral Stabilizers

Milled blade integral stabilizers, blank ended are available from stock.
The three blades are spiral milled in right hand in the configuration of 270° wrap angle.
Blades are machined to provide maximum mud circulation.
The blade diameter is 1/4 in. under size, for Integral Blade Stabilizers delivered without hardfacing.

Milled Blade Integral Stabilizers Standard Size Available from Stock

Milled blade integral stabilizers up to 36 in. crown OD can be manufactured.

Integral Stabilizers

The three blades are spiral milled in either right hand (R.H.) or left hand (L.H.) in mainly three configurations:

  • Open spiral (wrap angle 150° to 210°)
  • Full Open spiral (wrap angle over 210° to 270°)
  • Tight spiral (wrap angle over 270° to 360°)

Blades are machined to provide maximum mud circulation.

Connections features, bore back box, stress relief pin, cold rolled thread roots, phosphate coated connections and thread protectors are standard. Blank ended Integral Stabilizers can be delivered.

Hardfacing Types

A complete range of hardfacing is available:

HF 1000 : Crushed tungsten carbide (grain size 3 mm) held in a nickel bronze matrix suitable for a soft drilling formation
HF 2000 : Trapezoidal tungsten carbide inserts held in a sintered carbide nickel bronze matrix
Ideal for high deviation drilling in abrasive formation
HF 3000 : Tungsten carbide inserts set in a powder spray deposit. Recommended for non-magnetic stabilizers
HF 4000 : Tungsten carbide inserts (button type). Recommended for highly abrasive formations
HF 5000 : Oxy-acetylene process applies tough molten carbides particles of varying size held in a nickel chrome matrix

Hardfacing is applied to the leading edge for additional protection.

Blades are ground to a maximum diameter of 1/32 in. under gauge on all hole sizes.

Rotary Reamer Forgings

Please see the Rotary Reamer Forgings Data for the standard sizes.

Other sizes can be provided on request.




We are also able to supply the Hole Openers according to the customer’s design (max. 42").

On inquiries
and orders
please specify

Integral
Stabilizers:

  • Drill collar size and ID
  • Type of stabilizer
  • Type of hardfacing
  • Spiral type
  • Connection type and size

Stabilizer forgings
& Rotary Reamers Forgings:

  • Crown OD
  • Necks OD
  • Bore ID
  • Overall length
  • Crown length
  • Upper neck length
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Subs-Pup Joints

Rotary Subs

All rotary subs are manufactured from AISI 4145H modified chromium molybdenum alloy steel, fully-quenched and tempered to obtain API Spec. 7-1 mechanical properties.
All connections are machined according to API Spec.7-2 and thread roots are cold worked, phosphatized and coated with API thread compound and equipped with protectors.

The following rotary subs are available:

Straight OD Subs is used to connect drill stem products that have a similar outside diameter

Reduced Section Sub is used to connect drill stem members that have different diameters.
The cross section change necessarily to accommodate different connections

Saver Sub or Kelly Saver Sub is used to extend the life of the Kelly. The saver sub connection can be easily repaired or inexpensively replaced.

Lift Subs - Lift Plugs

Lift subs and lift plugs are manufactured from AISI 4145H modified chromium molybdenum alloy steel, fully-quenched and tempered to obtain API Spec. 7-1 mechanical properties.
All connections are machined according to API Spec.7-2 and thread roots are cold worked, phosphatized and coated with API thread compound and equipped with protectors.

Pup Joints

Pup joints are machined from integral bars of AISI 4145H MOD alloy steel, full-length quenched and tempered to obtain the API Spec. 7-1 mechanical properties.

All connections are machined according to API Spec.7-2 and thread roots are cold worked, phosphatized and coated with API thread compound and equipped with protectors.

Pup joints are available in 10, 15 and 20 ft lengths to match standard drill pipes dimensions. The primary use of the pup is to adjust the overall length of the drill string to land at a specific depth.

On inquiries
and orders
please specify

Rotary Subs:

  • Type of subs
  • Length between shoulders
  • Largest outside diameter
  • Connection type and size
  • Special features

Lift Subs:

  • Type of subs (whether 18° taper or square shoulder elevator)
  • Diameter of lift shoulder (S)
  • Diameter of Elevator recess (A)
  • Length of Elevator recess (L)
  • OD and ID
  • Connection type and size
  • Overall length

Lift Plugs:

  • Plug type
  • Drill collar OD (D)
  • Lifting flange OD (A)
  • Connection size and type

Pup Joints:

  • Length between shoulders (G)
  • Nominal size (A)
  • Bore ID
  • Tool Joint OD
  • Location of connections. Example: NC 50 Box up × NC 50 Pin down
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Integral Square and Hexagonal Kellys

Square and Hexagonal Kellys are manufactured from AISI 4145H Mod. steel. Kelly bars are full-length uniformly quenched and tempered to obtain API Spec. 7-1 mechanical properties.

Kelly ends, drive sections, internal diameters and connections are machined and inspected to API Spec.7-1.

Drive section of all kellys are gauged for dimensional accuracy using a sleeve gauge conforming to API Spec.7-1 specifications. Kelly bored bars are gauged to API specification with a 10 ft drift mandrel.

Mill test certificates including mechanical properties, chemical analysis and inspections are supplied with all kellys.

All Kellys are supplied with pressed steel thread protectors and located within plain shipping scabbards.

Special or non-standard lengths are available on request.
Integral Kellys up to 54’ length are available on request.

On inquiries
and orders
please specify

  • Kelly type (square or hexagonal)
  • Nominal Size and overall length
  • Upper connection size and type
  • Lower connection size and type
  • Inside diameter
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Non-Magnetic Drill Collars

Non-Magnetic Drill Collars are produced from Amagnit 501 and Amagnit 601.
Amagnit 501 and 601 are chromium manganese austenitic low carbon alloy steels obtained by VOD process, and rotary hammer warm forging process combining chemical analysis and temperature / time cycle.
Amagnit 501 and 601 are resistant to stress corrosion cracking with high mechanical properties, low magnetic permeability and no tendency to galling.

A compressive layer is applied to the bore of the collars to increase the resistance to stress corrosion cracking.

Connections

All threads are cut with constant profile tools on CNC machines.
API relieve groove pin and bore back box stress relief features are standard.
Thread roots are cold-worked to improve fatigue resistance of the connection.
All connections are coated with API thread compound to prevent corrosion and galling.
Standard protectors are installed to ensure adequate thread protection.

On inquiries
and orders
please specify

  • Outside and Inside diameters
  • Length
  • Connection size and type
  • API stress relieve groove on pin and box
  • Type of thread protector
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Non-Magnetic Flex Collars and Pony Collars

Non-Magnetic Flex Collars and Pony Collars are produced from Amagnit 501 and Amagnit 601.
Amagnit 501 and 601 are chromium manganese austenitic low carbon alloy steels obtained by VOD process, and rotary hammer warm forging process combining chemical analysis and temperature / time cycle.
Amagnit 501 and 601are resistant to stress corrosion cracking with high mechanical properties, low magnetic permeability and no tendency to galling.

A compressive layer is applied to the bore of the collars to increase the resistance to stress corrosion cracking.

The lengths of Non-Magnetic Flex Collars are generally 31, 15 and 10 feet.
Other sizes can be provided, on request.

Pony Collars are short slick drill collars which are used in order to adjust the length and control the placement of components in bottom-hole assembly. The lengths of the Pony Collar are 5, 10, 15 and 20 feet.

Other sizes can be provided on request.

On inquiries
and orders
please specify

for Flex Collars:

  • Nominal Size
  • OD tool joint and wear section
  • ID
  • Length
  • Connection size and type
  • API stress relieve groove on pin and box
  • Type of thread protector

for Pony Collars:

  • Outside and Inside diameters
  • Length
  • Connection size and type
  • API stress relieve groove on pin and box
  • Type of thread protector
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Non-Magnetic Rotary Subs

All non-magnetic rotary subs are manufactured from Amagnit 501 and Amagnit 601.
All connections are machined according to API Spec.7-2 and thread roots are cold worked and coated with API thread compound and equipped with protectors.

The following rotary subs are available:

Straight OD Subs are used to connect drill stem products that have a similar outside diameters.

Reduced Section Subs are used to connect drill stem members that have different diameters.
The cross section changes necessarily to accommodate different connections.

On inquiries
and orders
please specify

Non-Magnetic Rotary Subs

  • Type of subs
  • Length between shoulders
  • Largest outside diameter
  • Connection type and size
  • Special features
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Non-Magnetic Stabilizers

Non-Magnetic Stabilizers are manufactured from chromium manganese austenitic low carbon alloy obtained by VOD process and high speed press warm forging process combining chemical analysis and temperature /time cycle to get API Spec. 7-1 properties.

Ultrasonic inspection and MPI inspections are performed on each forging over its full length and section, after rough machining according to API Spec 7-1.
Mill test certificates including mechanical properties, chemical analysis, magnetic properties and inspections are supplied with all stabilizers.

A compressive layer is applied to the bore of the forgings to increase the resistance to stress corrosion cracking.

Non-Magnetic Milled Blade Integral Stabilizers

Non-Magnetic Milled blade integral stabilizers, blank ended are available on request.
The three blades are spiral milled in right hand in the configuration of 270° wrap angle.
Blades are machined to provide maximum mud circulation.
The blade diameter is 1/4 in. under size, for Integral Blade Stabilizers delivered without hardfacing.

Non-Magnetic Integral Stabilizers

The three blades are spiral milled in either right hand (R.H.) or left hand (L.H.) in main three configurations:

  • Open spiral (wrap angle 150° to 210°)
  • Full Open spiral (wrap angle over 210° to 270°)
  • Tight spiral (wrap angle over 270° to 360°)

Blades are machined to provide maximum mud circulation.

Connections features, bore back box, stress relief pin, cold rolled thread roots, phosphate coated connections and thread protectors are standard.
Blank ended Integral Stabilizers can be delivered.

Hardfacing Types

F 3000: Tungsten carbide inserts set in a powder spray deposit. It is recommended for non-magnetic stabilizers.

Hardfacing is applied to the leading edge for additional protection.

Blades are ground to a maximum diameter of 1/32 in. under gauge on all hole sizes.

On inquiries
and orders
please specify

Non-Magnetic Stabilizer forgings, rough turned

  • Crown OD
  • Necks OD
  • Bore ID
  • Overall Length (G)
  • Crown length (F)
  • Upper neck length

Non-Magnetic Integral Stabilizers

  • Drill collar size and ID
  • Type of stabilizer
  • Type of hardfacing
  • Spiral type
  • Connection type and size
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AISI 4145H Modified, API Spec. 7-1, NS-1, DS-1

Hot rolled or forged solid or bored round bars, quenched and tempered to API Spec.7-1, NS-1 and DS-1 specifications.

Mechanical Properties

Mechanical properties are according to API Spec 7-1, NS-1 and DS-1.
Tensile, impact properties are determined by tests on specimens conforming to the requirement of ASTM A370.
Tests specimens are obtained from the end of the bar. The specimens are machined so that the centre point of the gauge area is located at minimum of 4" (100 mm) from the end of the bar. The tensile and impact specimens are oriented in the longitudinal direction, with the centerline of the specimen located 1" (25.4 mm) from the outside surface. Impact specimens are radially notched.

On request, mechanical properties can be determined on test specimens taken at mid-radius.

Non-Destructive Examinations

Ultrasonic inspections and surface defects inspections are performed, in accordance with API Spec 7-1, NS-1 and DS-1 procedures, on each product.

Finish and Appearance

Finish and appearance of our products comply with ASTM A322.

* Nota: NS-1 and DS-1 properties and certification are provided on request. Please specify your needs in your enquiry.

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OD Range C Si Mn P S Cr Mo Ni Cu
Up to 10”
inclusive
Min. 0.42 0.20 0.85 - - 0.90 0.15 - -
Max. 0.49 0.35 1.10 0.025 0.025 1.20 0.35 0.25 0.35
Over 10” Min. 0.42 0.20 1.00 - - 1.00 0.25 - -
Max. 0.49 0.35 1.50 0.025 0.025 1.30 0.35 0.50 0.35
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Tensile Test, ASTM A370, Longitudinal, room temperature, at 1 in. below the surface, per batch
OD Range Tensile Strength (UTS) Yield Strength (YS) at 0.2% offs Elongation on 2”
Min. %
Reduction of Area
Min. %
Min. psi Min.MPa Min. psi Min.MPa
Up to 7” exclusive 140 000 965 120 000 827 14 45
7” and over 140 000 965 120 000 758 14 45
Impact Test, ASTM A370, Charpy V notch, Longitudinal, Room Temperature, per batch
Min. Average 40 ft-lb (54 J) with no single value less than 47 J (35 Ft-Lbs)
Impact Test, ASTM A370, Charpy V notch, Longitudinal, Temperature - 4°F (- 20°C), per batch
Min. Average 32 ft-lb (44 J)
Surface Hardness test on each product
Min: 285 HB
Max: 340 HB
Sub-Surface Hardness test per batch
Min: 285 HB
Max: 340 HB

AISI 4140 - L80, API Spec. 6A / API Spec. 5CT, H2S Service

Hot rolled or forged solid or bored round bars, H2S Service, quenched and tempered to API Spec.6A, 80K, K, EE , API Spec. 5CT and ISO 15156 (NACE MR 0175).

Definitions

K : Temperature operating range: - 60 / + 82 °C (- 75 / + 180 °F)
Impact test at - 60°C (- 75°F)
EE : Sour Service (H2S Service) as defined in ISO 15156 (NACE MR 0175).
PSL : : Product specification level

Chemical Analysis

Chemical analysis is according to API Spec. 6A, grade L80 of API Spec. 5CT and AISI 4140.

Mechanical Properties

Mechanical properties are according to API Spec 6A, 80K, K and API Spec. 5CT.
Tensile, impact properties are determined by tests on specimens conforming to the requirement of ASTM A370.
Specimens are taken from QTC (Qualified Test Coupon) according to API Spec. 6A.

Non-Destructive Examinations

Ultrasonic inspections and surface defects inspections are performed, in accordance with API Spec. 6A procedures, on each product.

Finish and Appearance

Finish and appearance of our products comply with ASTM A322.

close
C Si Mn P S Cr Mo Ni Cu
Min. 0.38 0.15 0.75 0.80 0.15
Max. 0.43 0.35 1.00 0.025 0.025 1.10 0.25 0.25 0.35
close
Tensile Test, 80K, ASTM A370, Longitudinal, room temperature, on QTC, per batch
Yield Strength at 0.2% Tensile Strength Elongation
%
Reduction of Area
%
psi MPa psi MPa
Min. 80 000 552 100 000 689 18 45
Max. 95 000 655 - - -
Impact Test, ASTM A370, Charpy V notch, Longitudinal, Temperature - 75°F (- 60°C), on QTC, per batch
Min. Average 20 ft-lb (27 J) and only one single less than 20 ft-lb (27 J) and min. 15 ft-lb (20 J)
Min. Lateral Expansion 0.015 in. (0.38 mm)
Impact Test, ASTM A370, Charpy V notch, Longitudinal, Temperature - 40°F (- 32°C), on QTC, per batch
Min. Average 31 ft-lb (42 J)
Surface Hardness test on each product
Min: 207 HB
Max: 234 HB (22HRC)

AISI 4130, API Spec. 6A - PSL 3-4, H2S Service

Hot rolled or forged solid or bored round bars, square bars, disks and rings, H2S Service, quenched and tempered to API Spec.6A, 75K, K, EE and ISO 15156 (NACE MR 0175).

Definitions

75K : Standard tensile property requirement (Mini Yield Strength 75 000 psi)
K : Temperature operating range: - 60 / + 82 °C (- 75 / + 180 °F)
Impact test at - 60°C (- 75°F)
EE : Sour Service (H2S Service) as defined in ISO 15156 (NACE MR 0175).
PSL : : Product specification level

Mechanical Properties

Tensile, impact properties are determined by tests on specimens conforming to the requirement of ASTM A370 Specimens are taken from QTC (Qualified Test Coupon) according to API Spec. 6A.

Non-Destructive Examinations

Ultrasonic inspections and surface defects inspections are performed on each product, in accordance with API Spec. 6A procedures.

Finish and Appearance

Finish and appearance of our products comply with ASTM A322.

close
C Si Mn P S Cr Mo Ni Cu
Min. 0.28 0.15 0.40 0.80 0.15
Max. 0.33 0.35 0.60 0.025 0.025 1.10 0.25 0.25 0.35
close
Tensile Test, 75K, ASTM A370, Longitudinal, room temperature, on QTC, per batch
Yield Strength at 0.2% Tensile Strength Elongation
%
Reduction of Area
%
psi MPa psi MPa
Min. 75 000 517 95 000 517 18 35
Impact Test, ASTM A370, Charpy V notch, Longitudinal, Temperature - 75°F (- 60°C), on QTC, per batch
Min. Average 20 ft-lb (27 J) and only one single less than 20 ft-lb (27 J) and min. 15 ft-lb (20 J) Min. Lateral Expansion 0.015 in. (0.38 mm)
Surface Hardness test on each product
Min: 207 HB Max: 234 HB (22HRC)

AISI 4330V Modified, ASTM A29

Hot rolled or forged solid or bored round bars, quenched and tempered to API Spec.7-1.

Mechanical Properties

Mechanical properties are tested according to ASTM A370.
Tensile, impact properties are determined by tests on specimens conforming to the requirement of ASTM A370.
Test specimens are obtained from the end of the bar. The samples are taken at a distance of D/2 (D= diameter) from the end of the bar. The tensile and impact specimens are oriented in the longitudinal direction, with the centreline of the specimen located at mid-radius from the outside surface.
Impact specimens are radially notched.

Non-Destructive Examinations

Ultrasonic inspections and surface defects inspections are performed, in accordance with ASTM A388 and API Spec. 6A, PSL3, on each product.

Finish and Appearance

Finish and appearance of our products comply with ASTM A322.

close
C Si Mn P S Cr Mo Ni Cu V
Min. 0.29 0.15 0.75 - - 0.80 0.40 1.70 - 0.05
Max. 0.33 0.35 1.00 0.015 0.005 1.10 0.50 2.00 0.35 0.10
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Tensile Test, ASTM A370, longitudinal, room temperature, at mid-radius, per batch
OD Range
inch
Tensile Strength (UTS) Yield Strength (YS) at 0.2% Elongation on 2”
Min. %
Reduction of Area
Min. %
Min. psi Min.MPa Min. psi Min.MPa
Up to 7.25 exclusive 173 000 1191 165 000 1136 14 45
over 7.25 158 000 1088 150 000 1033 14 45
Impact Test, ASTM A370, Charpy V notch, longitudinal, room temperature, at mid-radius, per batch
Min. Average 40 ft-lb (54 J).
Impact Test, ASTM A370, Charpy V notch, longitudinal, - 32°C (- 26°F), at mid-radius, per batch
Min. Average 31 ft-lb (42 J).
Surface Hardness test on each product
Min: 340 BHN or 36 HRC
Max: 380 BHN or 40 HRC

Non-Magnetic Steels

Non-Magnetic products manufactured by ACE O.C.T.G. are produced from Amagnit 501 and Amagnit 601;Amagnit 501 and 601 are chromium manganese austenitic low carbon alloy steels obtained by VOD process, and rotary hammer warm forging process combining chemical analysis and temperature / time cycle.
Amagnit 501 and 601 are resistant to stress corrosion cracking with high mechanical properties, low magnetic permeability and no tendency to galling.

Magnetic Properties

Non magnetic properties are certified at delivery and remain constant during the life time of the products.

Magnetic Permeability
Max : 1.010
Average : 1.005
Magnetic Field Gradient (hot spots)
Max : 0.05 micro-tesla / 100 mm

Corrosion Resistance

The structure is austenitic, free of ferrite and precipitation at the grain boundary. The susceptibility to intergranular attack is carried out according to ASTM A 262 practice E. No intergranular cracks should be detected. Each bar is tested.

Amagnit 501 and 601 has passed all the main corrosion tests in chloride solutions imposed by the Directional Drilling Companies:

  • Constant Load tests
  • Slow Strain Rate Tests
  • C Ring Tests to ASTM G 36 / G 38
  • Pitting Corrosion

A compressive layer is applied to the bore of the collars to increase the resistance to stress corrosion cracking.

Certification

All main Directional Drilling Companies have formally approved grades Amagnit 501 and Amagnit 601.

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Amagnit 501

C Si Mn P S Cr Mo Ni N PREN
Min. 18.0 13.0 0.35 0.25 0.32 19
Max. 0.04 0.60 22 0.030 0.005 15.0 0.50 0.50 0.40 23

Amagnit 601

C Si Mn P S Cr Mo Ni N PREN
Min. 18.0 15.5 2.0 4.2 0.40 28.5
Max. 0.05 0.30 20.0 0.030 0.005 17.5 2.8 5.2 0.50 35
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Amagnit 501

ASTM A 370, room temperature, longitudinal
OD range inches Min. Yield Strength at 0.2% Min. Tensile Strength Min. Elongation Min. Reduction Min. Impact Test Charpy V notch
psi N/mm2 psi N/mm2 % % Joule ft.lb
31/2 to 67/8 120 000 825 135 000 930 25 50 130 100
7 to 9 3/4 112 000 770 130 000 900 25 50 130 100

Amagnit 601/HS

ASTM A 370, room temperature, longitudinal
OD range inches Min. Yield Strength at 0.2% Min. Tensile Strength Min. Elongation Min. Reduction Min. Impact Test Charpy V notch
psi N/mm2 psi N/mm2 % % Joule ft.lb
31/2 to 67/8 140 000 925 150 000 1035 20 50 100 74
7 to 9 3/4 130 000 900 150 000 1035 20 50 130 100

Stock

We supply our customers both directly from our partner mills as well as from our stocks. Currently we have three storage locations: Dubai, Houston and Singapore.

Dubai, Houston and Singapore stocks supply raw material (solid and bored bars in various grades) as well as finished drilling tools like Drill Collars, Integral Heavy Weight Drill Pipes and Stabilizers.

We would like to introduce you here below our stocks of solid and bored bars in Dubai, Houston and Singapore. Please choose the grade, size range and length of the bars you are interested in. Our stocks are replenished regularly, please do not hesitate to contact our offices for your inquiries. We would be delighted to assist you in your successful business.

Contact us

We would be glad to answer your questions and/or to study your enquiry. Please fill in the below fields and we will do our best to revert as quickly as possible.

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WESTERN EUROPE

Sales Office

ACE O.C.T.G Ltd.
189/1 The Strand
Gzira GZR 1024 - Malta
Mr Michel Hirner
michel.hirner@global-ace.eu
Cell: +352 661 666 675
Mr Frederic Hirner
frederic.hirner@global-ace.eu
Cell: +971-56-5013762

ASIA

Sales Office and Warehouse

ACE O.C.T.G International Partnership Pte Ltd.
25 Loyang Crescent
Loyang Offshore Supply Base
Block 103 TOPS Avenue 1, #03-06
Singapore 508988
Mr Mathieu Laborde
mathieu.laborde@global-ace.eu
Cell: +65 9852 3162

MIDDLE EAST

Sales Office and Steel Processing Center

ACE OCTG FZCO
Jebel Ali Free Zone, South Zone
Behind Essar Steel & Hong Hua Steel,
PO Box 54943
Dubai, United Arab Emirates
Mr Simon Daniel
simon.daniel@global-ace.eu
Tel: +971-4-8806000
Mobile: +971-50-9106401
Mr Nobel Mathew
nobel.mathew@global-ace.eu
Tel: +971-4-8806000
Mobile: +971-56-1793920
Mrs Rashmi Utchil
rashmi.utchil@global-ace.eu
Tel: +971-4-8806000
Mobile: +971-50-1040625
Mr Nelson D’Sa
nelson.dsa@global-ace.eu
Tel: +971-4-8806000
Mobile: +971-50-5483304
Mr Frederic Hirner
frederic.hirner@global-ace.eu
Tel: +971-4-8806000
Mobile: +971-56-5013762

USA

Sales Office and Warehouse

ACE O.C.T.G. USA Inc.
4900 Woodway Drive, Ste 1120,
Houston TX 77056, USA
Mrs Florence Hirner
florence.hirner@global-ace.eu
Cell: +1 (713) 503-3231
Mr Frederic Poule
frederic.poule@global-ace.eu
Cell: +1 (713) 409-9946

SAUDI ARABIA, YEMEN AND BAHRAIN

Representative Office

RASSIS COMPANY LTD
Al Qashlal - Dhahran 3423
Behind Aston Hospital
Dammam - Khobar High Way,
Dammam - Saudi Arabia.
Mr Muhammad Eissa
eissa@global-ace.eu
Tel : +966 13 8085 496 / 498
Fax: +966 13 8085 497
Mobile: +966 50 4818461

SOUTH AMERICA COLOMBIA

Representative Office

ThyssenKrupp Comercial Colombia S.A.S.
Mrs Lida Baron
lbaron@thyssenkrupp.com.co
Tel : +57 1 5209047 / +57 1
5209062 Ext. 210
Cell: +57 316 832 4552

SOUTH AMERICA VENEZUELA - PERU - ECUADOR - ARGENTINA

Representative Office

Acebron, S.A.
Mr Gerardo Bergna
gbergna@acebron.com.ve
Tel: +58-212-718-0893
Cell: +58-412-563-1366
Mr René Rojas
rrojas@acebron.com.ve
Tel: +58-291-651-4350
Cell: +58-414-097-9156

GLOBAL METALL ACE O.C.T.G. SARL

Sales Office

GLOBAL METALL ACE O.C.T.G. SARL
217 Route d’Esch
L-1471 Luxembourg
Mr Michel Hirner
michel.hirner@global-ace.eu
Cell: +352 661 666 675

GLOBAL METALL ACE O.C.T.G. BRANCH OFFICE KREFELD

Sales Office

GLOBAL METALL ACE O.C.T.G. BRANCH OFFICE KREFELD
Kimplerstrasse 290 - 292
47807 Krefeld, Germany
Mrs Susanne Becker
susanne.becker@global-ace.eu
Tel: +49 2151 78409 14