Spiral Drill collar
The main operate of spiral drill collar: It is to stop drilling instruments from force differential block during drilling, the spiral groove permits the mud flow freely about the drill collar to balance force preventing pressure block, so efficiently stay away from little bit sticking from differential pressure. Spiral collar can also minimize the speak to region between the wall and tubular body, so as to keep away from from sticking phenomenon of drill string.
Item Description
Item Description
API seven Oil Well Drilling Spiral Non-Magnetic Drill Collar
1) Normal: API Spec seven
two) API and ISO accredited
3) Specification: 3-1/8”, three-one/2”, four-one/8”, four”, four-3/4”, 5”, six” 6-1/four”, 6-3/four”, 7″, 7-one/four”, seven-three/four”, eight”, eight-one/four”, nine”, 9-1/two”, 9-three/four”, 10″, 11″
four) Materials: Alloy Metal
five) Description
A drill collar is a unit utilised in the drilling of oil wells for weighting the drill little bit, enabling it to drill through rock. It is a bar produced of reliable metal, possibly plain carbon metal or a non-magnetic metal alloy, drilled lengthwise to allow the passage of drilling fluids. A drill collar forms the cheapest component of a drill string, which encompasses all the components of a down-hole process from the surface to the rock little bit.
6) Framework
These products are normally 31 ft (about 9.forty five m) long and threaded at the two ends, male at one particular end and female at the other, to enable several drill collars to be joined over the little bit assembly.
The number of drill collars attached to a drill string will rely on the substance composition of the strata at the drill web site and the very likely depth of the effectively. A comparatively shallow effectively with much less dense geologic framework by means of which the little bit should move will need fewer drill collars than a deep shaft by means of dense materials.
Normally, drill collars will be consistent in length but might vary in diameter, and their outside configuration might be slick or spiral. The outside the house diameter could fluctuate from about three-1/2 inches (eight.89 cm) to eleven inches (27.9 cm) and increased. The reference to slick or spiral outer configuration refers to the machining of the outside surface of the collar.
seven) Attribute of Non-mechanical Drill Collar
Materials of Non-magnetic drill collars are made from chrome manganese lower carbon austenitic alloy, which has following characteristic:
a. The chemical composition ought to be managed strictly throughout the refining and forging method.
b. With superb reduce Magnetic permeability, high toughness of mechanical qualities and exceptional resistant to anxiety corrosion cracking and no inclination to galling.
eight) Parameter
Sort | OD(mm) | ID(mm) | L(m) ±152.4mm d |
DF(mm) ±0.four |
NC23-31 | 79.4 | 31.eight | 9.14 | seventy six.two |
NC26-35 | 88.nine | 38.one | nine.14 | eighty two.9 |
NC31-41 | 104.8 | fifty.eight | 9.14or9.45 | 100.4 |
NC35-47 | one hundred twenty.six | fifty.8 | nine.14or9.45 | 114.seven |
NC38-50 | 127 | 57.2 | 9.14or9.forty five | 121 |
NC44-60 | 152.4 | 57.two | 9.14or9.forty five | one hundred forty four.5 |
NC44-60 | 152.4 | seventy one.4 | 9.14or9.45 | one hundred forty four.five |
NC46-sixty two | 158.eight | fifty seven.two | 9.14or9.45 | 149.two |
NC46-62 | 158.eight | 71.4 | nine.14or9.45 | one hundred fifty |
NC46-65 | 165.one | 57.two | nine.14or9.45 | 154.8 |
NC46-sixty five | 165.1 | 71.4 | 9.14or9.45 | 154.eight |
NC46-67 | 171.4 | fifty seven.2 | 9.14or9.45 | 159.5 |
NC50-70 | 177.8 | fifty seven.two | 9.14or9.45 | 164.7 |
NC50-70 | 177.8 | seventy one.4 | 9.14or9.forty five | 164.7 |
NC50-seventy two | 184.two | 71.four | nine.14or9.45 | 169.5 |
NC56-seventy seven | 196.eight | 71.four | nine.14or9.45 | 185.three |
NC56-80 | 203.2 | 71.4 | 9.14or9.forty five | 190.1 |
six-five/8REG | 209.six | seventy one.four | nine.14or9.45 | 195.six |
NC61-90 | 228.six | seventy one.4 | nine.14or9.forty five | 212.7 |
7-five/8REG | 241.three | seventy six.two | 9.14or9.forty five | 223.8 |
NC70-97 | 247.6 | 76.two | nine.14or9.forty five | 232.six |
NC70-one hundred | 254 | 76.2 | 9.14or9.forty five | 237.3 |
8-five/8REG | 279.four | 76.2 | 9.14or9.45 | 266.7 |
NC50-67 | 171.five | seventy one.4 | nine.14or9.45 | 159.five |
nine) Mechanical Residence
OD Size | Yield Strength σ0.two Mpa(psi) |
Tensile Power σb Mpa(psi) |
Elongation δ4% |
Reduction of location % |
Reduction of spot % |
three-one/eight~six-three/four | ≥758 -110,000 |
≥827 -120,000 |
≥18 | fifty | ≥50 |
seven~ten | ≥689 -100,000 |
≥758 -110,000 |
≥20 |
Why Pick Us
one) Experience in casting for over 15 years and served consumers all all around the world.
two) Common substance according to technological drawing
three)Secure high quality
four) On-time supply
5) Aggressive price tag and good service
six) Optimistic customer comments from domestic and intercontinental market place
7) International innovative-degree gear these kinds of as CNC, numerical lathes, furnance, welding
products, CMM and detect &tests products we utilised to make certain our product's good quality.
8) OEM provider, your need is our pursued.
9) ISO9001:2008 and TS16949 high quality control
10) Standard: ASTM BS DIN etc
FAQ
one. What are the main materials of your products?
We are focused on casting and processing of grey iron and ductile iron products.
two. What is your MOQ?
We will arrange production based on your drawings and deliver your products as per your requirements. We will do our best to meet your demands.
three. What is your main equipment?
Our casting equipment is brought from Japan. They mainly include: FBO auto molding lines, sand lines, cleaning lines, vertical and horizontal machining centers and CNC machining center.
4. Do you make the molds by yourself?
We are facilitated with advanced mold making equipment and CNC processing machining center. Therefore, we can make molds independently.
5. What are your advantages?
one) Professional staff
2) 24 years of casting experience
three) Rigorous quality control system
4) On-time delivery rate is over 98%