Coring Drill Rod BQ 1.5m

2021-07-30

Name	Product Code	Description	O.D (mm)	I.D (mm)	Net weight (kg)	Gross weight(kg)	Pitch (mm)	Thread length (mm)	Product length (mm)
BOQ-10'	20100301	10 '	￠55.6	￠46.2		19.1	8.47	44.5	3048
BOQ-3M	20100302	3M	￠55.6	￠46.2		18.8	8.47	44.5	3000
BOQ-5'	20100303	5 '	￠55.6	￠46.2		9.55	8.47	44.5	1524
BOQ-1.5M	20100304	1.5M	￠55.6	￠46.2		9.4	8.47	44.5	1500

Name	Label color	Package length (mm)	Packing width (mm)	High packaging (mm)	Weight per bundle (kg)/19 pieces	Rated depth	Maximum torque rating	Maximum tensile force rating
BOQ-10'	Black	3150	285	255	362.9	1500m(5000ft)	800Nm(590ft-lb)	115kN(26000 lbf)
BOQ-3M	Black	3100	285	255	357.2
BOQ-5'	Black	1620	285	255	181.45
BOQ-1.5M	Black	1600	285	255	178.6

Performance description	BOQ
Performance description	Metric	Imperial
Rated drilling depth calculated as per joint strength	1500 m	4900ft
Maximum rated tension	110 kN	25,000 lb
Maximum rated torque	750 Nm	553 ft-lb
For deep hole over 2000m, recommended minimum torque
For deep holes greater than 1000m, the minimum torque is recommended	500 Nm	412 ft-lb
Recommended minimum torque	400 Nm	296 ft-lb
Theoretical blast pressure at API inner thread end (as per API published 5C3)	39000 kPa	5656 psi
Theoretical blast pressure in API middle part (as per API published 5C3)	93000 kPa	13482 psi
Theoretical collapse pressure of API middle (as per API published 5C3)	97000 kPa	14073 psi

Judging criteria
Product outer diameter	55.9 mm	2.19 in
Product inner diameter	46.1 mm	1.81 in
Deviation resistance of rod (rigidity)	6100 mm	9.47 in
Bar content weight per unit length (water)	1.65 L/m	0.126 gal/ft
Displacement of rod per unit length (water)	0.76 L/m	0.066 gal/ft

Drilling Rod type:

QO series drilling rod is interchangeable with Q series coring drilling rod that is common in the international geological exploration industry. Taper threaded connection is adopted to facilitate connection and prevent stuck, and thread surface is hardened to greatly prolong service life of the thread.

Pipe body: Quality alloy steel pipe is adopted and 100% test is conducted for each raw material to ensure uniform concentricity, straightness and heat treatment.

Thread: Taper threaded connection (3 threads per inch) is adopted to facilitate connection and prevent thread stuck. Each thread is under relatively even stress, providing sufficient strength for product application.

Heat treatment: The whole undergoes heat treatment process to improve service life of products. Threads at both ends of the product undergo special process treatment to provide about 140% of material strength. Service life of inner thread improves obviously.

Thread surface hardening: after special process treatment, outer thread surface hardness is up to about 55HRC, which effectively avoids "sticking thread" and reduces abrasion and "stuck" due to engagement of thread;

RQO series product undergoes technical upgrading on the basis of QO product. Well drilling capability is improved and well drilling cost is decreased due to its stable and reliable connection.

Pipe body: quality alloy steel pipe is adopted and 100% test is conducted for each raw material to ensure uniform concentricity, straightness and heat treatment.

Thread: RQO thread product adopts taper (3 threads per inch) connection and taper and reverse load angle are increased simultaneously to enhance connection strength and assembling and disassembling convenience.

Heat treatment: The whole undergoes heat treatment process to improve service life of products. Threads at both ends of the product undergo special process treatment on the basis of QO series product to improve about 175% of material strength to further improve strength of material. Service life of inner thread improves obviously.

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