Spiral drill collar

Spiral drill collar is made of AISI4145HS Cr-Mo steel in accordance with API Specifications and SY/T5144 Standards. Threads can be processed with cold rolling, coppering or phosphating. We can process double-shoulder threads and other specifications of special threads and can also produce drill collars whose outer diameter is 14 inches.

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Spiral drill collar

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Spiral drill collar

● Dimension of spiral groove

OD		A Depth of cut mm	Lead ±25.4Pitch mm	B Depth of cut mm
mm	in	A Depth of cut mm	Lead ±25.4Pitch mm	B Depth of cut mm
98.4	37/8	4.0±0.79	914
101.6-111.1	4-43/8	4.8±0.79	914
114.3-130.2	41/2-51/8	5.6±0.79	965
133.4-146.1	51/4-53/4	6.4±0.79	1067
149.2-161.9	57/8-63/8	7.1±1.59	1067
165.1-177.8	61/2-7	7.9±1.59	1168
181.0-200.0	71/8-77/8	8.7±1.59	1626	2.6±0.79
203.2-225.4	8-87/8	9.5±1.59	1727	6.4±0.79
228.6-250.8	9-97/8	10.3±2.37	1829	7.1±1.59
254.0-276.2	10-107/8	11.1±2.37	1930	7.9±1.59
279.4	11	11.9±2.37	2037	8.7±1.59

Note: spiral drill collar is equipped with 3 spiral grooves featuring right-handed rotation an even distribution.

Spiral drill collar

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Mailbox:sales@zuolintool.com

Telephone: 86-13203935825

CONTACT US

sales@zuolintool.com

Tel: 86-13203935825

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Welcome to fill in the following form, fill in your product requirements, contact information and other information, we will quickly feedback your purchase consultation. You can also contact us through online consultation, email, etc., and our customer service team will further provide you with quality service.

Quick access toTechnical SupportandDetailed Quotations

Welcome to fill in the following form, complete your product requirements, contact information and other information, we will quickly feedback your purchase consultation. You can also contact us through online consultation, e-mail , and our customer service team will further provide you with excellent service.