Technology

Through many years of extensive research and development testing of protective coatings, experts with Majorpack have concluded that in order to provide complete protection from all corrosive agents in any given environment it is necessary to use a multifaceted system.

Majorpack (MPST101), our initial prototype coating, has a diffusion intermetallic primer that is 1.97 mils thick (50 μm). The intermetallic primer covers 100% of the tubing surface, both internal and external. Internally, an epoxy-polymeric coating is applied that is 1.57 mils thick (40 μm).

It is common in the oil and gas industry, as a result of mechanical damage to the internal coating, that a holiday will form and corrosion will occur. With the combination of protection from zinc protective attributes and an epoxy-polymeric coating it has become possible to solve this problem.

Types of MP coatings

Through further development, changes have been made in the structure of MPST101 to optimize its protective properties in specific environments. As a result, several other coatings have been produced:

  • MPST101 – first coating in Majorpack line-up. No longer in line-up due to advancements in technology
  • MPAG58 – modified MPST101. Application: oil industry, MTBF(*): several months
  • MPLAG14 – internal protection system for more benign environments
  • MPLAG17T – this coating was developed as a special protection from paraffin deposits
  • MPLAG33 – internal protection system for corrosive environments
  • MPLAG96 – high-temperature internal barrier protection system
  • MPAG96 – modified MPAG58 designed for systems with a combination of corrosion and paraffin

MPST101

MPST101 is the first coating in Majorpack’s line-up. It was developed for goods subjected to complicated corrosion conditions. The technology of MPST101 made it possible to completely cover and protect the surface of goods, including complex geometrical configurations. The inter metallic zinc primer enables coverage of threaded connections.
Products with Majorpack coating MPST101 are meant for operation in any complicated corrosion conditions including: free air, fluid mediums etc. From the beginning of Majorpack coating technology, the standard model of protection from external actions have been the usage of either barrier or protective qualities of materials/coatings.
In Majorpack coatings the new model of multilayer coating have been applied. This model simultaneously combines barrier and protective qualities. The product has been covered by a layer of a reactive metal, providing it with the cathodic protection through metal crystal lattice, and over this layer it has been additionally covered with a barrier layer preventing the ingress of aggressive mediums to the substrates body.
The positive effect from this application of protective coatings makes it possible to broaden the line-up of Majorpack coatings and develop special types of coatings for other complicated factors, including more corrosive ones.
In respect to the oil and gas industry and its principal complicated factors, the main indicators of Majorpack MPST101 coating are explained in this table.
It is recommended for usage in tubing with nonupset or upset ends, sucker rods and and also at the fixture elements (couplings, reducing taper elbows).
It is highly recommended to use the Majorpack protective Streamer (insert) for the protection of the inner surface of a coupling.
The most widely spread metal – Zn, used as a protective coating, is covered only by the way of diffusion zinc-coating. Apart from the protective qualities it acts as a primer for the barrier layer on the polymeric base, coated on zinc primer, which enables to considerably increase the adhesion and reduce to zero widespread effect of polymeric coatings to peel off when being used in the oil-well tubings.
Total coating thickness: 6.26 mils (150 microns).

Corrosion
Carbon dioxide (СО2)
Hydrogen sulphide H2S
Acid treatment
Paraffin deposits
Threaded connections’ protection
Temperature resistance
120° C
Adhesion
6 MPa

MPAG58

The coating Majorpack MPAG58 was specifically designed for equipment operated under corrosive environments. Its multilayer coatings structure uses a combination of protective qualities from several materials that mutually complement each other. Essentially, the well-known weak points of one layer are smoothed over by the strong features of the other. This coating is for use in corrosive conditions where the operating process is characterized by the unfavorable thermal conditions and the corrosion-active gases and fluids. The long and safe performance of the coating to a high extent depends on the service conditions and the specific aggressive environment in oil-wells.
The coating includes metallic primer, chemically more active than iron (Fe), which works as a protective layer to the corrosive fluids in an oil-well. This given layer covers the body of a tubing and a coupling completely, including the threaded connections.
Its micro-hardness is several times higher than the micro-hardness of Grade E steel which provides the supreme resistance to the mechanical wear. For example, instead of 4-6 round-trips the threaded connection can stand more than 50 round-trips.
The top thermoplastic, with all this, performs the additional barrier functions preventing the access of the aggressive mediums and fluids to the body of the tubing and to the protective layer.
Therefor there is complete protection of the substrate and mean time to failure is considerably increased.
In respect to the principal complicated factors, the main indicators of Majorpack MPAG58 coating are explaned in the following table.
It is recommended for tubulars with nonupset or upset ends, sucker rods and and also at the fixture elements (couplings, reducing taper elbows).

It is highly recommended to use the Majorpack protective Streamer (insert) for the protection of the inner surface of a coupling.
Total coating thickness: 6.26 mils (150 microns).

Corrosion
Carbon dioxide (СО2)
Hydrogen sulphide H2S
Acid treatment
Paraffin deposits
Threaded connections’ protection
Temperature resistance
180° C
Adhesion
10 MPa

MPLAG14

When designing a corrosion protective system for the oil and gas industry as a first-priority a number of coatings have been made. MPLAG14 – is a perfect example of such kind of a Majorpack coating.
One of the most widely spread complicated factors in the oil and gas industry is the production of high-viscosity fluid and as a consequence of it – different deposits at tubing walls that cause the gradual decline in production volume and extra operational costs. It’s often the corrosion problem on such oil-wells, with high-viscosity oil, is not very serious and is not taken into account. For these type of conditions this coating has been designed without an inter metallic primer and with more focus on deposit mitigation.
This internal coating reduces asphalt-paraffin deposit and can be used with acid treatments for fighting the deposition of other solids.
Majorpack MPLAG14 can be applied to both new and used tubular goods.
In respect to the principal complicated factors, the main indicators of Majorpack MPLAG14 coating are explaned in the following table.
It is recommended for tubulars with nonupset or upset ends, sucker rods and and also at the fixture elements (couplings, reducing taper elbows).

It is highly recommended to use the Majorpack protective Streamer (insert) for the protection of the inner surface of a coupling.
Total coating thickness: 3.94 mils (100 microns).

Corrosion
Carbon dioxide (СО2)
Hydrogen sulphide H2S
Acid treatment
Paraffin deposits
Threaded connections’ protection (optional)
Temperature resistance
160° C
Adhesion
10 MPa

MPLAG17T

MPLAG17T is a polymer coating aimed to prevent paraffin deposits along with different types of corrosion. Its liquid base enables a higher level of adhesion to the surface of tubulars and withstands harsh environment conditions. MPLAG17T is a coating with a very smooth surface specifically designed for paraffin mitigation. The thickness is less than 4.5 mils (115 micrometers) and can operate in temperatures up to 350 degrees F. MPLAG17T protects the inner surface of tubulars in high level of CO2 environments as well as other corrosive environments. Tubulars with MPLAG17T can be repaired without complications after being placed in operation. It is being widely used in different oil field environments and is substantially increasing the meantime between failures.

Corrosion
Carbon dioxide (СО2)
Hydrogen sulphide H2S
Acid treatment
Paraffin deposits
Threaded connections’ protection (optional)
Temperature resistance
170° C
Adhesion
10 MPa

MPLAG33

MPLAG33 is a new polymer coating aimed to prevent different types of corrosion using a newly developed liquid base in order to achieve very high level of adhesion to inner surface of tubings and to withstand very harsh environments. The thickness of coating is less than 4.6 mils (115 microns) and can be operated in temperatures up to 320 degrees F. It protects the inner surface of tubulars in high level of CO2 environments as well as salt and oxygen types of corrosion environments. Tubings with MPLAG33 can be repaired without any complications in afterward operation. Besides common production wells, MPLAG33 can be successfully used in water injection and water supply well. MPLAG33 is being widely used in different oil field environments and is substantially increasing the meantime between failures. As of 2016 operation time of coated tubulars with MPLAG33 in some environments has exceeded 700 days and is still increasing. MPLAG33 has been approved by a number of leading oil companies.

Corrosion
Carbon dioxide (СО2)
Hydrogen sulphide H2S
Acid treatment
Paraffin deposits
Threaded connections’ protection (optional)
Temperature resistance
160° C
Adhesion
10 MPa

MPLAG96

MPLAG96 is a polymer coating aimed to prevent different types of corrosion using a newly developed liquid base in order to achieve very high level of adhesion to inner surface of tubings and to withstand very harsh environments. The thickness is less than 5 mils (120 microns) and can be operated in temperatures up to 400 degrees F. It protects the inner surface of tubulars in high level of CO2 environments as well as salt and oxygen types of corrosion environments. Tubulars with MPLAG96 can be repaired without complications after being placed in operation. Majorpack MPLAG96 is being widely used in different oil field environments and is substantially increasing the meantime between failures. As of 2016 operation time of coated tubulars with MPLAG33 in some environments has increased several hundred days and is still increasing. MPLAG96 coating has been approved by a number of leading oil companies.

Corrosion
Carbon dioxide (СО2)
Hydrogen sulphide H2S
Acid treatment
Paraffin deposits
Threaded connections’ protection (optional)
Temperature resistance
200° C
Adhesion
10 MPa

MPAG96

MPAG96 was specifically designed for equipment operated under corrosive environments. Its multilayer coatings structure uses a combination of protective qualities from several materials that mutually complement each other. Essentially, the well-known weak points of one layer are smoothed over by the strong features of the other. This coating is for use in corrosive conditions where the operating process is characterized by the unfavorable thermal conditions and the corrosion-active gases and fluids. The long and safe performance of the coating to a high extent depends on the service conditions and the specific aggressive environment in oil-wells.
The coating includes metallic primer, chemically more active than iron (Fe), which works as a protective layer to the corrosive fluids in an oil-well. This given layer covers the body of a tubing and a coupling completely, including the threaded connections.
Its micro-hardness is several times higher than the micro-hardness of Grade E steel which provides the supreme resistance to the mechanical wear. For example, instead of 4-6 round-trips the threaded connection can stand more than 50 round-trips.

The top thermoplastic, with all this, performs the additional barrier functions preventing the access of the aggressive mediums and fluids to the body of the tubing and to the protective layer.
Therefor there is complete protection of the substrate and mean time to failure is considerably increased.
In respect to more complicated environments, the main indicators of Majorpack MPAG96 coating are explained in this table.
MPAG96 coating includes all the best features of its predecessors. At the same time tubings with MPAG96 coating can be used in low-temperature environments with heavy crude oil as well as environments having problems with scale deposit formation. Moreover, physical properties of its hydrophobic polymer surface make it possible to recommend it for usage in environments with asphalt-paraffin deposits.
It is recommended for tubulars with nonupset or upset ends, sucker rods and and also at the fixture elements (couplings, reducing taper elbows).

It is highly recommended to use the Majorpack protective Streamer (insert) for the protection of the inner surface of a coupling.

Total coating thickness: 7.87 mils (200 micron).

Corrosion
Carbon dioxide (СО2)
Hydrogen sulphide H2S
Acid treatment
Paraffin deposits
Threaded connections’ protection
Temperature resistance
200° C
Adhesion
12 MPa

Line up extension

New coatings that are going to be developed and tuned in the next future

  • MPHAG541 – for aggressive oil environment with MTBF (Mean Time Between Failures): about tens of days
  • MPVHA702 – for watershed of metal constructions used in the marine environment

Research partners

University of Trento

DIMTI – Department of Materials Engineering and Industrial Technologies

Exova

Testing. Advising. Assuring.

Centro Sviluppo Materiali

Is a reference research center operating in the worldwide scenario of innovation in materials

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majorpack Streamer

MP Streamer is a protective insert made for the protection of the J area in oilfield tubular connections. It is designed to prevent corrosion of a threaded connection as a result of the influence of turbulence in the unprotected part of the connection.
Minimizing and eliminating the clearance between the tubing and coupling connection, MP Streamer secures the joint, preventing it from the abrasive and erosive wear.

Advantages

  • registered (patented) construction
  • adapted for the triangular thread, prevailing in the Russian oil production industry
  • protects the tubing’s nipple from the production fluid
  • protects the vulnerable inner surface of a coupling from washing out corrosion caused by the production fluid
  • MP Streamer’s width is adapted for the exact joint «tubing-coupling»
  • operation temperature: 200°-220°C
  • MP Streamer is easily installed without special training and installation can be done in field conditions at the pipe yard without using some special facilities.
  • MP Streamer can be used regardless of tubing’s condition – in new and used ones.
  • Minimizing and eliminating the gap connections “tubing-coupling” MP Streamer provides tightness of connection, thereby preventing abrasive and erosive wear due to the high speed exposure of the production fluid (flow)