Tubular Inspection:

  • Hardbanding:

What is Hardbanding?

Hardbanding is the process of hardfacing drill pipe joints in order to protect both the casing and drill joints from wear. Using a MIG welding process, hardbanding is applied to the box and pin end of drill pipe tool joints bonding the hardbanding alloy with the steel of the drill pipe.

The need for hardbanding resulted when drilling contractors wanted to protect and extend the life of their drill pipes and tool joint material from the wear associated with drilling.

The original use of hardbanding was to protect the tool joints from wear. Now in today’s market, it is to protect the casing from wear as well as the tool joint. Hardbanding for drill string components has always been an important issue. For the drilling contractor, the correct hardbanding can prolong the life of the drill pipe by preventing the tool joint OD wearing below “Premium Class”. Such wear would reduce the strength of the connection and may result in a failure. For the operator, they must choose the right hardbanding type to minimize the risk of casing wear. From an economic point of view, it is also in their interest to ensure that the drill pipe has a long life in his wells, reducing failure, rental and replacement costs. Thus they must ensure that the hardbanding application type, e.g. flush or proud, will also minimize tool joint wear. The cost of drill string failures are nearly always shouldered by the operator.


Mobile hardbanding units provide timely, cost-effective maintenance for tubulars without shipping costs to and from a service centre or the loss of use of the tubulars during those shipping times. Using state-of-the-art portable equipment, fully trained and qualified TISL personnel provide onsite application of hardbanding for drill collars, drill pipe, and Hevi-Wate drill pipe.


  • Ultrahigh – Pressure Waterjetting:

Using Water as the principle ingredient to prepare surfaces for coating application is a relatively recent development. It was developed for two principle reasons.

First, water dampens dust emission and allows use of abrasive blast cleaning techniques in places where blasting dust is considered a nuisance or hazardous.

Second, the water can wash away soluble contamination, which dry blast cleaning cannot remove easily. The significance of soluble contaminants (not easily seen on a dry blast cleaned surface) has been increasingly recognised as a reason why coating fail to provide long term performance. Their removal is now considered to be an essential element of successful surface preparation for the best coating system.

Ultrahigh Pressure waterjetting uses water at very high pressure: 210MPa (30,000psi) and above (up to 340MPa 50,000psi).


  • Casing and Drill Pipe Inspection and Maintenance Services:

    • Electromagnetic (EMI) Inspection

    • Full Length Drifting and Boroscope Visual Inspection

    • Full Length Magnetic Particle Inspection

    • Liquid Penetrate Inspection

    • Special End Area Fluorescent MPI

    • Visual Thread Inspection

    • Sand Blasting & HP Water Blasting internal and external of pipe

    • PMI or Carbon Content verification for parent material certification

    • Protective Coating of internal and external of pipe

    • Special End Area UT inspection

With over 20 years experience in the pipe inspection arena, TIS Services is well endowed to provide pipe inspection services at our equipped facility Galeota Trinidad. TIS Tubular Department is committed to a quality assurance program. We perform detail inspections on each joint of threaded pipe. We check for lead, taper, thread height, thread length and stand off with different inspection instruments. We verify for torque and dimensional specifications of coupling on every joint. We also do a visual inspection of the upset on every joint to check for wrinkles, underfill and punch scores. If the pipe did not pass the inspection, it will be sent back to the production line for repair until it meets all the requirements.

TIS has state-of-the-art tube inspection equipment to meet API inspection requirements or third party inspections, including full-length wall thickness measurement of the pipe tubes


Description of Used Drill Pipe Inspection Categories (DS-1):


Category I

Visual OD and ID of Tube:

OD:  Crooked, Pits, Cuts, Dents, Raised Metal, Slip Crushing, Stretch, Swelling, Cracks,

ID:  Plugged, Corrosion, Pits, Scale, Coating Condition

Visual Connections: Weight and Grade Marks, Hard Band, Box and Pin Threads, Shoulders, Bevel, Box Swell, Profile Pin


Category II

Visual Tube: Category I Plus OD Gage Full Length   UT Wall Thickness Visual Connections: Category I Plus

Dimensional I: Measure Tong Space, Box OD, Box Shoulder Width, Pin ID


Category III

Category I and Category II Plus Star Tube Scan Inspection (Electromagnetic I) (Same as API RP 7G Standard Rack Inspection)


Category IV

Category III Plus MPI Slip Areas and Upset Areas

Dimensional 2: Dimensional I plus Measure Box Counter bore Diameter, Box Counter bore Depth, Box Seal Width, Bevel Diameter, Shoulder Flatness, and Pin Base Length


Category V

Category IV plus UT Slip/Upset Area (Blacklight Connections Optional) Electromagnetic 2: Same as Star Tube Scan plus Full-Length Wall Thickness Electromagnetic I May Be Substituted For Electromagnetic 2


  • EMI and Bottom Hole Assembly:

Investing in TIS’s Advanced Real Time Inspection Service (ARTIS) more than pays for itself, even if it helps you avoid just one drill string failure. Simply because the consequences of a failure downhole are so costly.

The ARTIS name symbolizes state-of-the-art Flaw and Wall Loss Detection for used Drill Pipe & Tubing and the highest quality and most advanced EMI pipe inspection technology available!

  • 100% computer controlled and DIGITAL SIGNAL PROCESSING!

  • 100% solid state magnetic transducers for the most sensitive EMI inspection capabilities.

  • Fast inspection speeds up to 140 fpm.

  • 2-3/8” through 6-5/8” O.D. tubular products can be inspected by this mobile system.

  • More than 100% coverage for Transverse Flaws and Localized Wall Loss Detection!

  • All data is stored in the computer system.

  • Reports and charts are printed in colour.

  • Inspection Tally Reports included.

Top of the line portable EMI equipment and Drill Collar Inspection systems along with highly trained professional technicians help you to get the job done right with minimal cost.


Inspection services of Bottom Hole Assembly (BHA):

Heavy-Weight Drill Pipe (HWDP), Drill Collars, Subs, X-Overs, Fishing Tools etc. are offered by TIS Services using the following methods:

  • Wet MPI (black light) on pin & box connections, slip areas, upset areas and wear pads of HWDP

  • Liquid Penetrant Inspection

  • Re-facing of Damaged Shoulder Seal

  • Ultrasonic (Shear Wave) Inspection

  • Hardness Test

  • ID/OD surface cleaning by Buffing, Grit Blasting or Rattling

  • Rust Preventing Coating