Drill Collar and Non Magnetic Drill Collar API Drill Collar Spiral

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Drill Collar and Non Magnetic Drill Collar API Drill Collar Spiral

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Product Description

Product Description & 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.

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

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

Simple structure and convenient use; connected directly to common drill collar without centralizers, greatly convenient for sinking in, fishing and milling operations.

Runs downhole safely; danger of leakage or bit freezing is hard to appear.

Pay attention to avoid mud balling and prevent the effect of anti-deviation.

Size	O.D(mm)	I.D.(mm)	Code	Thread	Length(mm)	Weight(kg)
3-1/8	79.4	31.8(1-1/4)	NC23-31	NC23	9140	298
3-1/2	88.9	38.1(1-1/2)	NC26-35	NC26	9140	364
4-1/8	104.8	50.8(2)	NC31-41	NC31	9140/9450	474/490
4-3/4	120.6	50.8(2)	NC35-47	NC35	9140/9450	674/697
5	127	57.2(2-1/4)	NC38-50	NC38	9140/9450	725/749
6	152.4	57.2(2-1/4)	NC44-60	NC44	9140/9450	1125/1163
6-1/4	158.8	71.4(2-13/16)	NC46-62	NC44	9140/9450	1134/1172
6-1/2	165.1	57.2(2-1/4)	NC46-65	NC46	9140/9450	1352/1398
7	177.8	57.2(2-1/4)	NC50-70	NC50	9140/9450	1597/1651
8	203.2	71.4(2-13/16)	NC56-80	NC56/6-5/8REG	9140/9450	2040/2109
9	228.6	71.4(2-13/16)	NC61-90	NC61	9140/9450	2658/2748

Mechanical properties: Yield Strength ≥758MPa, Tensile Strength ≥965MPa, Elongation ≥13%, Impact energy Ak ≥54J, Hardness range 285HB~341HB.

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Professional Profile

We are a professional manufacturer and supplier of Oilfield Equipment and Tools. Our company is located in a region that hosts the second largest oilfield in China. We have many years of history in the petroleum equipment industry. Our main products include drilling equipment, oil production equipment, and oil well service tools. Currently, our products are already exported to North America, South America, Middle East, Middle Asia, Africa and other countries and regions.

Our company has always focused on research, development and innovation. We regard "reasonable price, efficient production time and good after-sales service" as our tenet. We hope to cooperate with more customers for mutual development and benefits.

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Frequently Asked Questions

How can I place an order for drill collars?

You can contact us via our professional inquiry system or email with your specific size and material requirements. Our team will provide a detailed quote and technical confirmation.

What payment methods do you support?

We usually accept T/T (Telegraphic Transfer) and Western Union. Specific payment terms can be discussed during the PI (Proforma Invoice) confirmation stage.

What is the typical production lead time?

For items not in stock, the standard processing time is approximately 15-25 days. We ensure quality inspections at every stage before final shipment.

How do you ensure the quality of oilfield tools?

We conduct spot inspections during production and a full finished-product inspection. Our tools meet stringent yield strength and tensile strength standards.

What is your policy for defective products?

We take full responsibility for manufacturing defects. We typically offer replacements or credit the value to the customer's next shipment to ensure project continuity.

Are your drill collars compatible with standard API threads?

Yes, our drill collars are processed with standard threads such as NC23, NC26, NC31, and others mentioned in our specification table to ensure full compatibility.