Drill Collar

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Product Details

Export Markets:	North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe

Specifications

Drill Collar and Non-Magnetic Drill Collar

Drill collars are made with material AISI 4145H in accordance with API Spec 7-1. We supply slick drill collars, spiral drill collars and short / pony drill collar; their sizes are 30 feet and 31 feet.

Steel grade:
AISI 4145 H modified alloy steel, full length heat treated, with chemical analysis and mechanical properties which conform to the requirements of API Spec 7 (latest edition)

Types:
- finished drill collars
- slick or spiral
- with or without slip + elevator recess
- bored drill collar bars, plain end

Drill collars are made of self-designed premium alloy steel bar and pipe materials, and heat treated by continuous gas furnace to meet the mechanical requirements in API Specs.

Drill Collars

Slick collars

Spriral collars

Flex collars

2, Elevator, Slip Recess or Slip Holes

Unless otherwise specified, those are machined according to API RP7G recommendation.

3, Stress Relief Groove

4, Cold Rolling of Thread Roots

5, Make In & Break Out

6, Hardbanding
7, Thread Surface Process

All threads will be treated with phosphate coating process to improve wearness and prevent galling.

Service Process

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Service Guarantee

Free Service Charge

ECVV doesn't charge any service fee to Buyers for buying this product.
ECVV Supply

ECVV is responsible for supply, and provides product quality inspection, fund supervision and supply chain services.
Product Quality Commitment

ECVV China Sourcing Agent will assess the reputation and supply ability of the factory and conduct field trips to select the high-quality Chinese factories for buyers.
Deposit Service Commitments

In order to improve the quality of service, ECVV will charge for a 100CNY deposit for the agent purchasing order, and the deposit will be part of subsequent purchasing costs.

After paying a deposit, if the purchasing order is not completed because of unsatisfied ECVV services, ECVV will refund your deposit.