Tel: 86-546-8521870
Fax: 86-546-8521870

Email : 

Address: No.739, Dongying District, Dongying City, Shandong Province, China
Zip Code: 257061
Products Dongying Mingde Petroleum Technology Co.,Ltd > Products > Products > Plasma Slotted Liner and Screen Pipe > Plasma Slotted Liner
Plasma Slotted Liner

Plasma Slotted Liner, Slotted Liner, Slotted Casing, Slotted Tubing, Grooved Pipe, Slotted Pipe, API Slotted Tubing, API Slotted Casing, API Slotted Pipe, API 5CT Slotted Pipe

Characteristics of Plasma Slotted Liner:

Structural characteristics——compound cavity

Every slot from outside to inside of the pipe consists of trapezoidal slot similar to rectangle with outsidenarrow and inside wide, transitional arc and another trapezoidal slot with one large angle.The outsidetrapezoidal slot is similar to rectangle whose thickness is 2~3mm. The angle of outside trapezoidal slotis very small, which weakens the corrosion ratio of oil with sand and therefore prolongs the servicelife of screen pipe. Because of the large angle of inside trapezoidal slot, the flow resistance of crudeoil caused by the slot can be greatly reduced, which improves the efficiency of oil production. Plasma
slotted liner has the advantage of "self-cleaning"

Mechanical characteristics---higher mechanical strength than laser slotted liner

Plasma slotted liner is slotted in water-base compound operating fluids by high-frequency plasma beam without heat stress,therefore no heat-affected zone like micro crack and blast of laser slotted liner,which makes the plasma slotted liner preserve higher mechanical strength than slottedliner.

Slot surface characteristics——better abrasion resistance and inoxidizability

When the plasma blaze with high frequency and temperature is processing the base pipe, the waterbasecompound operating fluid produces electrolytic dissociation and thermal decomposition, whoseproduction reacts with external metal material of liner.The surface of liner is simultaneously heated bythe plasma blaze with high frequency. Consequently there generates a 0.1-0.2mm hardening and antiseptic layer on the processed surface of liner which can effectively prompt the abrasion resistance and inoxidizability of the slot.

Slot Surface between Laser Slotted Liner and Plasma Slotted Liner
Fig 1. The transversemetallograph
reinforcement of plasma slotted liner
Fig 2. The section view of the slot
surface of plasma slotted liner

Slot processing characteristics——high accuracy of slot width

The slot width shows high accuracy and the tolerance is ±0.03mm. The smooth surface can be Ra 1.6 μm.

Slot Surface between Laser Slotted Liner and Plasma Slotted Liner
Fig 3. The surface profile of plasma
slotted liner
Fig 4. The surface profile of laser
slotted liner

Application characteristics——self cleaning effect

Self cleaning effect is generally attributed to trapezoid slot shape, narrow at the surface and increasing in width at the interior, and the slot surface is smooth, which lets fine sands or shale easily enter without plugging. The larger sands blocked will sink as result of gravity to form permeable sand bridge to achieve the effects of external gravel pack.

Plasma Slotted Liner Specification

  Plasma Slotted Liner OD

  Φ50- Φ219

  Length of Plasma Slotted Liner


  Slot width

  Outside slot width   0.15-0.5


  0.6-4.0   Tolerance   ±0.10
  Inside slot width

  Inside slot width+0.2mm

  Slot length

  Slot length

  According to customers" request



  Slot quantities per circle

  According to customers`request

  Distance between the adjacent slots   According to customers`request

Application scope

It can be applied to the following well completion methods of horizontal well.side well.branch well and gravel pack well completion:

■Slotted Liner Well Completion

■Open Hole Screen Well  Completion

■Open Hole  Gravel Packing Well  Completion

■In-CasingGravel Packing Well  Completion

■Slotted Liner Well Completion with External Casing packer

Copyright © Dongying Mingde Petroleum Technology Co.,Ltd     Lu ICP 06041064 No.    Technical support:天宇智能

您是第: 位访问者