Spiralband®NC Case History
Region: Bakken region of North Dakota, USA
Drilling Contractor: Helmerich & Payne, Inc - Rig #259
Hardbanding and Inspection Services: Pathfinder Inspections and Field Services
In this case study, the common practice by the operating company is to use class 2 pipe for the lateral section of their drill string until rejected at class 3. More inspection has been required as the wear happens in a shorter period of drilling. Typically, the tool joints are in good condition, but the drill pipe has been downgraded due to wear of the tube body. The drill pipe is able to meet the operational demands for their drilling program, but there is not much remaining useful life due to body wall loss.
As a test, Spiralband®NC was chosen to be applied to protect 27 lengths of 4” O.D. Range II Drill Pipe which had experienced moderate loss of the tube wall thickness. This drilling program took place in the Bakken region of North Dakota in the United States.
The down hole parameters were:
Wells drilled – 13 Total
Total Depth – 21,075 feet on average per well.
Vertical – 11,130 feet on average per well
Lateral – 9,945 feet on average per well
ROP – 238 ft/hr (average)
Tool Joint Physical Parameters 4-7/8” Nominal O.D. Hardbanding proud 3/32”-1/8”
Spiralband NC was applied to protect 27 lengths of 4” – 14 lb S135 Range 2 drill pipe. The Spiralbanding was applied by Pathfinder Inspections and Field Services based in Dickenson, North Dakota. Pathfinder specifically developed a hardbanding unit in Dickinson to perform the Spiralbanding application.
By applying Spiralbanding to the downgraded pipe, the pipe has been able to retain its tube wall thickness without further loss. By using Spiralbanding the operating company has successfully been able to continue to utilize these sections in the laterals and reduce costs by not further downgrading their pipe.
There was documented 60% wear loss in the Spiralbanding after 13 wells. Following multiple inspections, there was no documented loss in the wall thickness of the drill pipe body. Additionally, there was no evidence of cracking or spalling in the Spiralbanding. The wear displayed in the Spiralbanding performed as expected considering that pipe was not rotated top to bottom.
The drill pipe was inspected after the 13 well program to DS-1 Category IV inspection criteria by Pathfinder Inspection and Field Services. Special inspection procedures were developed for tube and Spiralband inspection. Additionally, Duraband®NC hardbanding was applied on tool joints, and was deemed “Acceptable” and remained 100% crack free.
Inspection reports are available upon request.
Maximum Tool Joint and Drill Pipe Protection
Under actual downhole field testing, Spiralband®NC & Duraband®NC consistently provide superior wear resistance. Field and laboratory test reports are available upon request.
Every time drill pipe is utilized downhole, stress and fatigue are multiplied. Spiralband NC has consistently proven its resistance to cracking and spalling. Test results are available upon request.
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