Increase ROP equipments drill collar for well drilling

Product Description

Member Information

Model:	-
Brand:	LAKEPETRO
Origin:	Made In China
Category:	Metallurgy , Mining & Energy / Energy / Petroleum
Label:	rop , drilling tool , drill tool
Price:	US $500 / pc
Min. Order:	10 pc

Inquire Now

Drill collars are extra-heavy integral tools used to concentrate weight onto the drill bit so as to produce sufficient force for the drill bit to break rock efficiently while drilling. They are made of AISI 4145H modified steel and are connected between drill pipes and drill bits.
Drill collars come in 30 or 31 foot lengths and are furnished as slick (as-rolled surface finish) or spiraled. Spiraled drill collars have grooves on its external surface which maintains an even flow of drilling fluid around the collar to equalize pressure and reduce differential-sticking of the collar to the wall of the oilwell.
Our drill collar connections comply with dimensional requirements specified in API Spec. 7/7-1. Drill collars also come with slip and elevator recesses for safe and efficient handling. Slip and elevator recesses can be used together or separately.

Drill Collar Connection	Drill Collar Diameter(in)	Bore Diameter(in)	Length(ft)	Linear Weight (Approx.) (lb/ft)	Displacement (Open End) (US gal/ft)	Bending Strength Ratio
NC 23-31	3-1/8	1-1/4	30	22.00	0.337	2.57:1
NC 26-35 (2-3/8 IF)	3-1/2	1-1/2	30	26.70	0.408	2.42:1
NC 31-41 (2-7/8 IF)	4-1/8	2	30 or 31	33.65	0.515	2.43:1
NC35-47	4-3/4	2	30 or 31	46.81	0.716	2.58:1
NC 38-50 (3-1/2 IF)	5	2-1/4	30 or 31	53.29	0.815	2.38:1
NC 44-60	6	2-1/4	30 or 31	82.61	1.264	2.49:1
NC 44-60	6	2-13/16	30 or 31	75.90	1.161	2.84:1
NC 44-62	6-1/4	2-1/4	30 or 31	90.52	1.385	2.91:1
NC 46 -62 (4IF)	6-1/4	2-13/16	30 or 31	83.81	1.282	2.63:1
NC 46 -65 (4IF)	6-1/2	2-1/4	30 or 31	99.52	1.522	2.76:1
NC 46-65 (4IF)	6-1/2	2-13/16	30 or 31	92.81	1.420	3.05:1
NC 46-67 (4IF)	6-3/4	2-1/4	30 or 31	108.52	1.600	3.18:1
NC 50-70 (4IF)	7	2-1/4	30 or 31	117.52	1.798	2.54:1
NC 50 -70 (4IF)	7	2-13/16	30 or 31	110.77	1.694	2.73:1
NC 50-72 (4IF)	7-1/4	2-13/16	30 or 31	119.81	1.833	3.12:1
NC 56-77	7-3/4	2-13/16	30 or 31	139.90	2.140	2.70:1
NC 56-80	8	2-13/16	30 or 31	150.81	2.307	3.02:1
6-5/8 REG	8-1/4	2-13/16	30 or 31	161.81	2.472	2.93:1
NC 61-90	9	2-13/16	30 or 31	195.81	2.995	3.17:1
7-5/8 REG	9-1/2	3	30 or 31	217.00	3.319	2.81:1
NC 70 -97	9-3/4	3	30 or 31	230.00	3.518	2.57:1
NC 70-100	10	3	30 or 31	242.97	3.717	2.81:1
8-5/8 REG	11	3	30 or 31	299.00	4.574	2.84:1

When ordering or requesting quotations for drill collars, please specify the following :
Collar Outside Diameter (OD).
Drill Collar Bore (ID)
Length of Drill Collar
Size, type and location of connections,Eg: NC 50 BOX Up x NC 50 PIN Down
Slick or Spiral
Cast or Pressed Steel Thread Protectors
Special Optional Features as desired - slip and / elevator recesses and / hardband type.

Increase ROP equipments drill collar for well drilling 1

Increase ROP equipments drill collar for well drilling 2

Increase ROP equipments drill collar for well drilling 3

Standard Features

API Boreback Box Connection
API stress relieve groove pin connection
Cold Rolling Thread roots
Phosphate coated connections

Spiral grooved or Non-Spiral (Slick Type)
Type of Hardband and Hardband configuration
Elevator and Slip recesses or Slip Recess only
Other type of connections to meet specific needs

Protection

Standard Pressed Steel Thread Protectors. Cast Steel Lifting Bail Thread Protectors upon request.

Mill Test Certificates

Issued in accordance with API 7-1 specifications.

Third Party Inspection can be performed on request at buyer's care and expense.

Dongying Lake Petroleum Technology Co.,LTD
Country/Region:	Shan Dong - China
Business Nature:	Trading Company
Phone:	13356783063
Contact:	zang (Market)
Last Online:	15 Jan, 2016