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China Xi'an Landrill Oil Tools Co., Ltd
[China]

Address:
ROOM 508, SUNTEK INTERNATIONAL, NO. 6TH SUNTEK ROAD, HI-TECH ZONE, XIAN, CHINA Xian Shanxii 710075 China

Phone:
86-029-88454426

Contact name:
Shelley , sales manager

China Xi'an Landrill Oil Tools Co., Ltd

Oilfield Drilling Tools

	Drill Collar

Click to enlarge image

Usage :
One of the most important components of the drill string is to provide drilling bit of pressure and the drill string rigid role .

Standard : API 7, API 7-1 and SY/T standards.

Material : AISI 4145 H or Non-magnetic material.

Types:
Slick drill collars
Spiral drill collars
Non-mag material drill collars

Size : OD : 3 1/8" -- 11" Length : 10' -- 31'

Mechanical Property :
Mechanical Property of Slick and Spiral drill collars made of AISI 4145 H
OD Range Yield Strength(MPa) Tensile Strength(MPa) Elongation
(%) Hardness
(HB) Impact Test(J)
mm in
79.4節�71.4 31/8節�3/4 ≥758 ≥965 ≥13 285節�41 ≥54
177.8節�79.4 7節�1 ≥689 ≥930 ≥13 285節�41 ≥54

Mechanical Property of Non-mag Drill Collars
OD Range Yield Strength(MPa) Tensile Strength(MPa) Elongation (%) Hardness
(HB) Impact Test(J)
mm in
79.4節�71.4 31/8節�3/4 ≥758 ≥827 ≥18
177.8節�79.4 7節�1 ≥689 ≥758 ≥20