Sign In | Join Free | My brakesband.com
China Found Petroleum Equipment Co., Ltd. logo
Found Petroleum Equipment Co., Ltd.
We can accept the special requirement of order and technical cooperation, we are willing to work with global customers a friendly, equal and mutually beneficial trade.
Active Member

3 Years

Home > Drill Collar >

round drill collar

Found Petroleum Equipment Co., Ltd.

round drill collar

  • 1
  • 2
  • 3

Brand Name : FD

Place of Origin : China

MOQ : 1000 pcs

Payment Terms : L/C, T/T

Supply Ability : 15 Million Meters

Delivery Time : based on quantity

Packaging Details : Charge and free packaging

Contact Now

round drill collar

There are different kinds of drill collars,including round drill collar,spiral drill collar,non-magnetic drill collar,square drill collar and so on.Ordinary drill collar is the circular cross section, the center has a water hole,the wall thickness is larger,the nozzle is smaller, the weight of per unit length is greater than the size of drill pipe almost 4- 5 times .The majority of drill collar is thread processing directly on the pipe body , but some of them also use the replaced joint.

(1)Eccentric-weight drill collar is an effective anti-deviation drilling tool,with high drill pressure used in oblique areas,rectifying oblique as well.

(2)When drilling directional wells eccentric-weight drill collar is an effective tool to reduce oblique or straighten the well hole using high drilling pressure.

(3)Eccentric-weight drill collar has the advantages of simple structure,convenient use,connected directly to common drill collar without centralizers,greatly convenient for sinking in,fishing and milling operations.

(4)Eccentric-weight drill collar runs downhole safely,danger of leakage or bit freezing hard to appear.

(5)Pay much attention to avoid mud balling and prevent effect of anti-deviation.


CHEMICAL COMPOSITION

Drill Collar Specification
Thread TypeO.D.I.D.LengthDiameter of shoulder guide AngleReference bending strength ratio
mminchmminchmminch
NC23-3179.431/831.811/4915030ft76.22.57:1
NC26-35(23/8IF)88.931/238.111/282.92.42:1
NC31-41(27/8IF)104.841/850.82100.42.43:1
NC35-47120.743/450.82114.72.58:1
NC38-50(31/2IF)127557.221/41212.38:1
NC44-60152.4657.221/49150or945030ftor31ft144.52.49:1
NC44-60152.4671.4213/16144.52.84:1
NC44-62158.861/457.221/4149.22.91:1
NC46-62(4IF)158.861/471.4213/161502.63:1
NC46-65(4IF)165.161/257.221/4154.82.76:1
NC46-65(4IF)165.161/271.4213/16154.83.05:1
NC46-67(4IF)171.463/457.221/4159.53.18:1
NC50-67(41/2IF)171.463/471.4213/16159.52.37:1
NC50-70(41/2IF)177.8757.221/4164.72.54:1
NC50-70(41/2IF)177.8771.4213/16164.72.37:1
NC50-72(41/2IF)184.271/471.4213/16169.53.12:1
NC56-77196.873/471.4213/16185.32.70:1
NC56-80203.2871.4213/16190.13.02:1
65/8REG209.681/471.4213/16195.72.93:1
NC61-90228.6971.4213/16212.73.17:1
75/8REG241.391/276.23223.82.81:1
NC70-97247.693/476.23232.62.57:1
NC70-1002541076.23237.32.81:1
85/8REG279.41176.23266.72.84:1
Note: 1.Drill collar thread type: NC-Digital IF-Internal flat type REG-Normal type
2.Bending strength ratio: the ratio of the modulus of the cross section and the modulus of the cross section of the cross section of the dangerous section of the inner thread
In addition, our company can produce the drill collar and spiral drill collar, which can also produce the special specifications of the drill collar and the high efficiency and wear-resisting lengthening drill collar

O.D.cutting depthLead ±25.4
mminA(mm)B(mm)mm
863.3753.5±0.79679
98.43.8754.0±0.79914
101.6~111.14~4 1/84.8±0.79914
114.3~130.24 1/2~5 1/85.6±0.79965
133.4~146.15 1/4~5 3/46.4±0.791067
149.2~161.95 7/8~6 3/87.1±1.591067
165.1~177.86 1/2~77.9±1.591168
181.0~200.07 1/8~7 7/88.7±1.595.6±0.791626
203.2~225.48~8 7/89.5±1.596.4±0.791727
228.6~250.89~9 7/810.3±2.377.1±1.591829
254.0~276.210~10 7/811.1±2.377.9±1.591930
279.41111.9±2.378.7±1.592032

Advantages of Drill Collar Production Process:

In the process of heat treatment, the drill collar has added a special normalizing process, which makes the thread part grain more refined, enhances the drill collar thread strength, and effectively improves the service life of the drill collar.

Sreel MarkChemical Composition %
CSiMnPSCrMoCuAl
4145H0.42~0.480.15~0.350.90~1.20≤0.03≤0.030.90~1.200.15~0.25≤0.20.025~0.045
Other Elements:N≤0.015,Ni≤0.5

Drill Collar Mechanical Performance
Drill Collar Outside Diameter RangeYield StrengthTensile StrengthElongation
A%

HB
Charpy Impact
Akv J
mminMPaPsiMPaPsi
79.4~171.43-1/8~6-3/4≥758≥110000≥965≥140000≥13285~341≥54
177.8~279.47~11≥689≥100000≥930≥135000≥13285~341≥54
Under special conditions, the impact work of the charpy can be determined as greater than 70J according to the supply and demand

SizeO.D(mm)I.D.(mm)CodeThreadLength(mm)Weight(kg)
3-1/879.431.8(1-1/4)NC23-31NC239140298
3-1/288.938.1(1-1/2)NC26-35NC269140364
4-1/8104.850.8(2)NC31-41NC319140/9450474/490
4-3/4120.650.8(2)NC35-47NC359140/9450674/697
5127.057.2(2-1/4)NC38-50NC389140/9450725/749
6152.457.2(2-1/4)NC44-60NC449140/94501125/1163
71.4(2-13/16)NC44-609140/94501022/1056
6-1/4158.857.2(2-1/4)NC44-62NC449140/94501237/1279
71.4(2-13/16)NC46-629140/94501134/1172
6-1/2165.157.2(2-1/4)NC46-65NC469140/94501352/1398
71.4(2-13/16)NC46-65NC509140/94501249/1291
6-3/4171.457.2(2-1/4)NC46-67NC469140/94501471/1521
7177.857.2(2-1/4)NC50-70NC509140/94501597/1651
71.4(2-13/16)NC50-709140/94501494/1545
7-1/4184.271.4(2-13/16)NC50-72NC509140/94501625/1680
7-3/4196.871.4(2-13/16)NC56-77NC569140/94501895/1960
8203.271.4(2-13/16)NC56-80NC56/6-5/8REG9140/94502040/2109
8-1/4209.671.4(2-13/16)6-5/8REG6-5/8REG9140/94502188/2263
9228.671.4(2-13/16)NC61-90NC619140/94502658/2748
9-1/2241.376.2(2-13/16)7-5/8REG7-5/8REG9140/94502954/3054
9-3/4247.676.2(3)NC70-97NC709140/94503127/3234
10254.076.2(3)NC70-100NC709140/94503308/3421
11279.476.2(3)8-5/8REG8-5/8REG9140/94504072/4210
Mechanical properties:<7 inch Drill Collar:Yield Strength≥758MPa,Tensile Strength≥965MPa,Four times elongation≥13%,Impact energy Ak≥54J,(Single impact work≥47J,Average≥54J)Hardness range 285HB~341HB≥7inch Drill Collar:Yield Strength≥689MPa,Tensile Strength≥931MPa,Four times elongation≥13%,Impact energy Ak≥54J,(Single impact work≥47J,Average≥54J) Hardness range 285HB~341HB

More information you can views here



Quality round drill collar for sale

round drill collar Images

Inquiry Cart 0
Send your message to this supplier
 
*From:
*To: Found Petroleum Equipment Co., Ltd.
*Subject:
*Message:
Characters Remaining: (0/3000)