J55|N80 Slotted Liner

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Product  Descriptions :J55|N80 Slotted Liner

Slotted liners are used in gravel packed completions to prevent the production of gravel pack sand or can be used in stand-alone service when the formation grain size is large. Slot widths are often referred to in terms of "gage" or "gauge". Slot or screen gage is simply the width of the opening in inches multiplied by a 1,000. For instance, a 12 gage screen has openings of 0.012 inches. Slotted liners are manufactured by machining slot openings through oil-field tubulars with small rotary saws. Slotted liners are fabricated in a variety of patterns as illustrated in Figure.

The minimum slot widths that can be achieved is about 0.012 inches; however, slots widths cut below 0.030 inches in thickness involve higher costs because of excessive machine down time to replace broken saw blades that become overheated, warped and break. While the slotted liners are usually less costly than wire-wrapped screens, they have a smaller inflow area and experience higher pressure drops during production.

Slotted liners also plug more readily than screens and are used where well productivity is low and economics cannot support the use of screens. The single slot staggered pattern is generally preferred because a greater portion of the original strength of the pipe is preserved. The staggered pattern also gives a more uniform distribution of slots over the surface area of the pipe. The single slot staggered pattern is slotted with an even number of rows around the pipe with a typical 6 inch longitudinal spacing of slot rows.

SLOTTED LINER GEOMETRIES

The slots can be straight or keystone shaped as illustrated in Figure. The keystone slot is narrower on the outside surface of the pipe than on the inside. Slots formed in this way have an inverted "V" cross-sectional area and are less prone to plugging since any particle passing through the slot at the OD of the pipe will continue to flow through rather than lodging within the slot.

STRAIGHT AND KEYSTONE SHAPED SLOTS

The length of the individual slots is gauged on the ID of the pipe. Usual practice dictates 1½ inch long slots for slot widths 0.030" and under, 2 inch long slots for slot widths between 0.030 to 0.060 inches and 2½ inch long slots for slot widths 0.060 inches and larger (see Figure 6.4). Slot width tolerance is generally 0.003 inches for widths 0.040 inches and wider and 0.002 inches for widths less than 0.040 inches.

STANDARD SLOT LENGTHS

Slotted liners are generally designed to have a 3 percent open area relative to the OD surface area of the pipe although open areas up to 6 percent are feasible in some cases. The number of slots per foot required to achieve a given open area is calculated with the equation below.

where: N = required slots/foot (if N < 32, round up to the nearest multiple of four, if N > 32, round up to the nearest multiple of 8) Pie = constant (3.1416) D = outer diameter of pipe (inches) C = required open area (percent) W = slot width (inches) L = length of slot measured on ID of pipe (inches)


Dalipal Company is one of the most famous enterprises of china professionally producing pipeline and oil casing.We can supply API 5CT series of pipeline and oil casing with all kinds of specifications and materials.We have first-class production equipment and technology.

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Q:How big is the seamless steel tube of DN50?
Domestic steel pipe diameter is generally divided into A series and B series, DN50 pipe diameter of 60mm and 57mm respectively, the wall thickness should be based on your design pressure, temperature, pipe material to calculate.
Q:What is the buckling type thin-wall steel pipe? What is a tight set of thin-walled steel tubes? What's the difference between the two?
The wire pipe thread (box, cup lock fastening points) (JDG) and buckling type (KBG) two. Products are made of high-quality steel pipe, through precise stamping molding, supply pipe and terminal box connection. The nut is hexagonal, and the convex point is punched at the six corner so as to form a good multi-point contact after being connected with the junction box.
Q:How to identify stainless steel pipe and steel pipe?
Stainless steel (Stainless Steel) is referred to as the stainless steel, the resistance of air, steam, water and other weak corrosive medium or with stainless steel known as stainless steel; while the resistance to chemical corrosion (acid, alkali and salt chemical etching) corrosion of steel called acid resistant steel. Because of the difference in the chemical composition of the two, and make their corrosion resistance is different, ordinary stainless steel is generally not resistant to chemical medium corrosion, and acid resistant steel are generally stainless steel.
Q:How are steel tubes represented?
Galvanized pipe: InchSeamless steel tube, welded pipe, nonferrous metal pipe, etc.: outer diameter x wall thickness
Q:Seamless steel tube with the tube with what is the difference?
Seamless pipe can withstand ultra-high pressure, of course, its wall thickness will increase, which needs to be designed according to pressure requirements. It is generally used in high-pressure oil pipes, boiler tubes and other high temperature and high pressure equipment. There are also seamless tubes for structural purposes, depending on the design requirements.
Q:How to distinguish between steel pipe and spiral pipe material?
The alloy tube can be divided into: low alloy pipe, alloy pipe structure, high alloy tube, high strength tube. Bearing tube, heat resistant acid resistant stainless pipe, precision alloy (such as cutting alloy) pipe, high temperature alloy tube, etc..
Q:Where is the difference between seamless steel pipe and welded pipe?
Seamless steel tube is formed during rolling. Welded steel pipes need to be welded after coiling, and spiral welding and direct welding are generally used. Seamless performance is better, of course, the price is higher.
Q:How to make the steel pipe spray paint is not easy to fall off?
First you will rust steel, to clean, good quality alkyd rustproof paint, completely dry after brushing paint, color to see his kind of love.
Q:What is the size of seamless steel tube DN150?
Seamless steel pipe having a hollow cross section, used as a conduit for conveying fluids, such as pipelines for transporting petroleum, natural gas, gas, water, and certain solid materials. Compared withsteel and roundsteelinsolid, flexural torsional strength in the same time, the weight is light, is a kind of economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as the oil pipe, automobile transmission shaft, the bicycle frame and steel construction with scaffold with steel pipe manufacturing ring parts can be improved the utilization rate of materials, simplify the manufacturing process, material saving and working hours, has been widely used to manufacture steel tube.
Q:Difference and application of seamless hot rolled pipe and cold drawn pipe in seamless steel tube
The general production of hot-rolled seamless steel pipe in the automatic tube rolling mill. Solid billet after inspection and clearance of surface defects, cut into required length, in the tube hole end surface of centering, then sent to a heating furnace, in punch in punch. While continuing to rotate and advance, in the roll and immediate action, tube gradually form a cavity, called capillary. Sent to the automatic tube rolling mill on rolling. Finally after all the entire thickness, sizing machine sizing, achieve specifications. Using continuous pipe mill production of hot-rolled seamless steel tube is advanced.1.2, in order to obtain smaller size and better quality of seamless tube, cold rolling, cold drawing must be used or combined method of cold rolling. Usually in two roller mill, rolling ring groove tapered plug pipe in variable cross section circular slot and the composition. Drawing is usually in single or double 0.100T chain drawbench.1.3, the extrusion method will soon heat the tube blank in the closed extrusion cylinder, the perforation bar and extrusion rod movement, so that extrusion parts from the smaller die hole extrusion. This method can produce smaller diameter steel pipe

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