Anti GallingTechnical Overview
Environmental regulations in several key Oil& Gas Industry provinces have restricted theuse of traditional ‘pipe dope’ based OCTG
processes. This situation, coupled with thedramatic reduction in wellbore & equipment
contamination presented by use of emerging
surface treatments, led to the developmentof the JFE Steel Clear-Run® Advanced
Tubular System.

Key Features
From early 2001, Our technological development
partners-Hunting Energy Services International, R.S.
Clare & Co Ltd and MP(Eastern)Ltd have beenworking on the development and testing of ClearRun®, the first commercially field proven Advanced
Tubular System available to the Oil & Gas Industry,
incorporating the following technical features;
Zero Contamination of Down Hole Equipmentfrom OCTG Pipe DopeZero Well and Formation Contamination fromOCTG Pipe DopeControlled Make-Up and Breakout (withoutDope) with High Galling Resistance
Removal of Onshore and Offshore Thread
Cleaning & Preparation Time/CostAdvanced, Connection Life-Cycle Corrosion
Protection
Minimised Residual Environmental Impact,
Maximised Component Re-Cycling

In traditional OCTG processes, copper plating of thebox or couping end of the connection is used inconjunction with pipe dope on the threads to reduce
the occurrence of galling at the make-up stage. Despite
this, galling still remains a risk, often accounting for
an unacceptable reject rate in the field.
The development programme of the Clear-Plate® anti
galling technology was initially intended to produce a
coating that would be more resistant to disruption byconnection surface contact loads and pressures thantraditional copper coating.
Early variants of the alloy coating showed impressive
galling resistance and the product has now been further
developed to enable repeated running without theneed to use conventional API or “Green” dopes.
Extensive make and break testing has confirmed all
aspects of the performance and reliability of theAdvanced Tubular System. (see Clear-Run® Test Datasheet 01– Anti-Gall Properties of Clear-Plate™)

Controlled Make-Up
Extensive laboratory and field testing of Clear-RunCG® in conjunction with Clear-Plate® produced
similar friction profiles to traditional copper /API dope combinations.
(see Clear-Run® Test Datasheet 03 – Make-up and Break-out Testing)Corrosion Protection
The Clear-Run-CG® component of the system
protects the pin threads and the Clear-Plate®
electroplated alloy, in conjunction with Clear-RunCG®, protects the box or coupling end. Used incombination, these technically advanced products
provide levels of corrosion protection equivalent toin excess of traditional

P02 - Technical Overview - The JFE Steel Clear-Run™ Advanced Tubular Systemcopper/dope based processes without the need forcleaning or re-application prior to shipping from thepipe yard and running in hole.

·Experience of long term storage up to 24 months havebeen gained on Clear-Run® prepared tubulars thatwere taken immediately from stock and run at the wellsite with no indication of corrosion (Q1 ‘ 04) (see Clear-(see Clear-Run® Test Datasheet T-05 Connection Load Testing to ISORun® Case Study C01).

Improved Field Performance
In field tests and offshore running, removing the needfor connection cleaning and dope application at thepoint of make-up increased the speed of deploymentof tubular strings to the well by up to 20% (see Clear-Run®
Case Study C01).

Laboratory and field testing has conclusively
demonstrated Clear-Run’s resistance to petroleumbased solvents. The anti-gall performance of the ClearPlate® coating, together with Clear-Run-CG®
lubricant ensures a consistent make-up incircumstances such as base oil immersion when a
traditional doped system would have severely
deteriorated. (see Clear-Run® Test Datasheet T-05 Field
Running Trials).

Connection Performance
Due to improvements in drilling technologies, therequirements placed on casing and tubing connections
under combined loads of tension and compression,internal, external pressure and bending have become
increasinglysevere.
TheJFEBEAR™
premium
connection was designed for use in suchenvironments. JFEBEAR™ Clear-Run® has beensuccessfully tested to a service envelope based on ISO
13679 CAL IV loads and pressures.
During testing of the Clear-Run® system components,
the most severe of operating environments wassimulated with no comprimise to connection integrity
including:·Connection threads and seals manufactured toextreme tolerances·Application of Thermal Cycling with Combined
Loading Trials
Combined Pressure Test with Axial Loading to95% pipe body VME.

13679 Test Protocol).

Environmental Footprint
The overall Clear-Run® system dramatically reduces
the environmental impact of OCTG operations. The
removal of pipe dope from the process significantly
reduces contamination of the workspace, well formation
structures and the general land/sea environment.
With the JFE Steel Clear-Run® Advanced TubularSystem, Clear-Run-CG® has achieved the best
possible environmental performance under the UK
Cefas rating system and complies with therequirements on the “yellow” rating under
Norway’s adoption of the Harmonised Offshore
Chemical Notification Format (HOCNF). (see ClearRun® Test Datasheet T-04 Independent Environmental Impact
Classification)

Health and Safety Performance
The JFE Steel Clear-Run® Advanced Tubular System
has created a step-change in the way tubulars areprepared and run offshore. Clear-Run® improvessafety and working conditions both onshore andoffshore, reducing slip/trip potential and as a “nointervention” system reduces the potential for risksof other injuries when running.
With Clear-Run®, all the above health, safety andenvironmental benefits are realised whilst improving
connection performance and downhole well conditions.
(see Clear-Run® Test Datasheet T-08 Health and Safety Performance ofClear-Run®).

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P02 rev1 - Technical Overview - The JFE Steel Clear-Run® Advanced Tubular System