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Description of Slotted Pipe
Feature Description: A slotted pipe works as a separator to filter the sand in an oil or gas well; its main function is to control sand. Different grades and types (slotted, perforated, wire-wrapped, and so on) of pipes will be applied for different strata during oil and gas exploration.
Features:
1. A continuous slot opening that significantly increases the available open area, thus providing greater access to the water-bearing zone.
2. Under the same condition, a high open area can make the speed of groundwater entering the screen much slower than any other filtration apparatus, which will avoid sand from entering the screen because of high pressure, thus reducing the abrasion of the pump.
3. Our product has good characteristics of anti-acid,anti-alkali, and anti-corrosion, and it can adapt to the oil well's special demand. The crack won’t become bigger because of corrosion. It has good stability.
4. They have the features of easy backwashing, durability in use, safety, and reliability, as well as low comprehensive cost.
This laser-slotted screen pipe is used for petroleum. It can prevent 99% sand, decrease 80% of oil well heavy repair, and increase the oil well's strength, integrity, and stability by keeping out sand. Although its structure is simple, it's very effective. It has small cuts of 0.10—0.5mm in the tube wall
Main technical data:
Material: stainless steel, carbon steel
Categories of pipes: petroleum casing pipe, oil pipe
Length of pipe (single): ≤15m
Outside diameter of pipe: 50 to 200mm
Wall thickness ≤16mm
Width of slot: (0.10-0.40)mm±0.03mm
Number of slots: according to order
Distribution types of slots: parallel, crisscross, spiral
Distance of slots: according to order
Usage:
The slotted pipes used in oil exploration can prevent 99% sand, decrease 80% of oil well heavy repair, and increase the oil well's strength, integrity, and stability by keeping off sand. Meanwhile, the laser incision can make very small cuts with a smooth surface and high precision. Although its structure is simple, it is very effective. It has small cuts of 0.10-0.5 mm in the tube wall.
1. Where well productivity is small and economics cannot support the use of screens;
2. Ideal for sand control for low fines and clay reservoirs;
3. Excellent sand control choice for thermal heavy oil &bitumen reservoirs;
4. Suitable for high CO2/H2S, SAGD, CSS, and CBM.
Slot Types
We are able to laser-cut slots as per customer specification, either as straight slots or keystone slots.
Straight Slots
Cut at a right angle to the liner, this slot type shows the same diameter from the inside to the outside of the wall. Although straight slots are cheaper to produce, they are less effective in sand control compared to keystone slots.
Keystone Slots
Cut at a slight angle, keystone slots, or tapered slots, are larger on the inside than on the outside, making sure that any particle entering the slot can pass through freely without clogging the slot.
Keystone slots are more expensive than straight slots, but lower the risk of production losses due to plugged liner slots.
Slot Patterns
Whether you want your slotted pipe with a line, staggered, gang, overlapping, horizontal, or any other pattern, we can cut them all.
Among all slot patterns, the following three are the most common.
Line (Straight) Pattern
In the line pattern, slots are placed evenly in identical bands around the pipe, forming straight lines of slots across the length of the slotted liner.
Single-Slot Staggered Pattern
In the single-slot staggered pattern, bands of evenly spaced slots are placed around the pipe. Slots in different bands are offset (staggered) from each other.
The single-slot staggered pattern preserves the strength of the pipe and provides an even distribution of the slots over the area of the pipe.
Gang Pattern (Multiple Staggered Pattern)
While having the same overall layout as the single-slot staggered pattern, the gang pattern places two slots, cut at proximity, instead of just one slot at each position.
Slotted pipe with a multiple staggered pattern has been shown to withstand higher torque during installation and provide better resistance to deformation under thermal load compared to the single-slot staggered pattern, making it well-suited for application in steam-assisted gravity drainage (SAGD) applications.
