API 4145H Standard and Sprial Drill Collar

API 4145H Standard and Sprial Drill Collar

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Description

Product Application

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.

Key Features

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

Specification

Size(inch)	O.D(mm)	I.D.(mm)	Thread	Length(mm)	Weight(kg)
3 1/8	79.4	31.8	NC23	9140/9450	298
3 1/2	88.9	38.1	NC26		364
4 1/2	104.8	50.8	NC31		474/490
4 3/4	120.6	50.8	NC35		674/697
5	127	57.2	NC38		728/749
6	15.24	57.2	NC44		1125/1163
6	15.24	71.4	NC44		1022/1056
6 1/4	158.8	57.2	NC46		1237/1279
6 1/4	158.8	71.4	NC50		1134/1172
6 1/2	165.1	57.2	NC46		1352/1398
6 1/2	165.1	71.4	NC50		1249/1291
6 3/4	171.4	57.2	NC46		1471/1521
7	177.8	57.2	NC50		1597/1651
7	177.8	71.4	NC50		1494/1545
7 1/4	184.2	71.4	NC50		1625/1680
7 3/4	196.	71.4	NC56		1895/1960
8	203.2	71.4	NC56		2040/2109
8 1/4	209.6	71.4	6 5/8REG		2188/2263
9	228.6	71.4	NC61		2658/2748
9 1/2	241.3	76.2	7 5/8REG		2954/3054
9 3/4	247.6	76.2	NC70		3127/3234
10	254	76.2	NC70		3308/3421
11	279.4	76.2	8 5/8REG		4072/4210

Drill Collar	Yield Strength	Tensil eStrength	Four times elongation	Impact energy Ak	Single impact work	Average	Hardness range
<7 inch	≥758MPa	≥965MPa	≥13%	≥54J	≥47J	≥54J	285HB~341HB
≥7inch	≥689MPa	≥931MPa	≥13%	≥54J	≥47J	≥54J	285HB~341HB

Standards Compliance and Quality Assurance

API SPEC 7-1 Certification: Conforms to the international API SPEC 7-1 standard, ensuring compliance with global drilling industry requirements.
AISI 4145H Special Steel Material: Utilizes high-quality special steel, ensuring product quality and performance.

After-sales Service and Quality Assurance

Technical Support: Provides professional technical assistance, ensuring smooth operations for customers.
Quality Guarantee: Compliant with API SPEC 7-1 standards, ensuring high quality and performance.

Conclusion

The AISI 4145H special steel heavy-weight drill pipe, compliant with international standards and crafted from high-quality materials, is an excellent choice for challenging drilling environments. Contact us to explore more about how this product supports your project requirements.