API Spec 7 - SPIRAL DRILL COLLARS



Home \| Corporate Profile \| Associates \| Staff Profiles
.

API Spec 7 - SPIRAL DRILL COLLARS
(manufactured from AISI4145HM API modified alloy steel)

Revised: 29 Jun 2000 11:59 AM.

Item	Description
1	4 3/4" OD X 2 1/4" ID X 31 FEET 3 1/2" API IF (NC 38) CONNECTIONS
2	6 1/2" OD X 2 13/16" ID X 31 FEET 4" OR 4 1/2" API IF CONNECTIONS
3	8" OD X 2 13/16" ID X 31 FEET 6 5/8" API REG. CONNECTIONS
4	9 1/2" OD X 3"ID X 31 FEET 7 5/8" API REG. CONNECTIONS

.
.	With standard features:-
	Cold rolled thread roots Phosphate coated API stressed relief groove pin API Boreback Box Installed with pressed steel thread protectors Zip groove for Slip or Elevator recess Cold worked upper radii on Slip or Elevator recess Die-stamped with serial numbers traceable to mill inspection certificate and API spec 7 machining report

.
.	Optional:- Hardfacing
	.	When drilling in abrasive formations with hardfacing, it can appreciably increase the life of the drill collar. Proper controls of the preheating and post heating combined with an automatic gas-shielded consumable electrode process, ensure uniform results. Standard hardfacing application is flush to 1/32 inch greater than the drill collar OD.

For further information please do not hesitate to contact us:

General Sales Manager, Tubular
Doreen Ong
Email: doreen@mid-continents.com or
doreen@midcon.com.sg

Sales Manager, Tubular
Dennis Yong
Email: dennis@mid-continents.com or
dennis@midcon.com.sg