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Liner ranurado

TUSPIPE’s slotted liners strictly adhere to the requirements of the API 5CT international standard and can produce straight slots and keystone slots of various sizes according to customer requirements, ensuring the safety and stability of oil and gas wells.

shows-a-pic-of-slotted-liner

Liner ranurado

A slotted liner is a steel pipe with screen slots cut into the pipe wall. The slots are cut along the length of the pipe, and they typically range in width from 0.020 to 0.250 inches. Slotted liners are produced in strict accordance with the standard specification API 5CT developed by international organizations and are widely used in a variety of applications such as oil and gas production, water injection and geothermal Wells. The technical principle of the groove liner is to form a slit of a specific shape and size on the metal tube body using mechanical or laser cutting technology. Allows oil and gas to pass through, prevents sand and protects production equipment.

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icono-tubo

Desde 1998, Tianjin United Steel Piping Co., Ltd (TUSPIPE) se ha comprometido a suministrar tubos de línea de alta calidad.

Con más de 500.000 toneladas de capacidad de producción anual, la empresa presta servicio a diversos campos e industrias, como la explotación y transmisión de petróleo y gas, la construcción naval y de automóviles, el agua y la electricidad, la protección del medio ambiente, la ingeniería mecánica, la construcción de infraestructuras, etc.

TUSPIPE da mucha importancia a la calidad de los productos y a un riguroso control de calidad de los mismos. Para mantener la buena calidad de los productos, la empresa ha establecido un Centro de Pruebas e Inspección desde 2004. Con una serie de pruebas de última generación y equipos de inspección, el centro de pruebas e inspección es capaz de realizar las pruebas de tracción, pruebas hidráulicas, pruebas de impacto, DWTT, etc.

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Slot Size of Slotted Liner

The slot size of the slotted liner, which includes the width and length of the slot, is customized to the customer’s specifications. The minimum slot width for straight or keystone slots is 0.012 inches, and the maximum slot width is 0.25 inches.

1.5 Inch Long 2.0 to 2.5 Inch Long 2.5 Inch Long
0.012 inch wide 0.024 inch wide 0.078 inch wide
0.015 inch wide 0.025 inch wide 0.125 inch wide
0.016 inch wide 0.038 inch wide 0.250 inch wide
0.018 inch wide 0.048 inch wide -
- 0.058 inch wide -

Slotting Patterns of Slotted Liner

Three distinct slot layouts have been created to accommodate distinct traits (shown below). In comparison to staggered and straight slot patterns, the gang slot design significantly improves the liner’s resistance to lateral buckling and collapse stresses.

shows the slotting pattern of Staggered-Slotted-Liner

Staggered Slotted Liner

Staggered slots are evenly distributed around the circumference with an offset.

shows the slotting pattern of Gang Slotted Liner

Gang Slotted Liner

Gang slots are made up of many slots that are dispersed around the perimeter.

shows the slotting pattern of Straight Slotted Liner

Straight Slotted Liner

Straight slotted liner features slot columns spaced evenly around the circumference without offset.

Slot Types of Slotted Liner

TUSPIPE can laser-cut slots to customer specifications, either straight or keystone.

- Straight Slots

This slot type is cut perpendicular to the liner and has the same diameter from the inside to the outside of the wall. While straight slots are less expensive to build, they are less effective in containing sand than keystone slots.

- Keystone Slots

Keystone slots, or tapered slots, are cut at a little angle and are larger on the inside than on the outside, ensuring that any particle entering the slot can pass freely without clogging it.

While keystone slots are more expensive to manufacture than straight slots, they eliminate the danger of production losses caused by filled liner slots.

shows the cut slot of Straight Slots
shows the cut slot of Keystone Slots

Slot density

The slot density of a pipe is defined as the number of slots per foot of pipe. It is determined by the pipe’s outer surface’s open area. The open region of a slotted liner has a significant role in diminishing its sand control capacity. In general, open land is between 2% and 4% of the total area.

After determining the open area, slot width, and liner diameter, the slot density per foot can be estimated using the following formula:

N = (12*π*D*C) / (100*W*L)

N stands for slot density or the number of slots per foot
D stands for the outside diameter of the liner in inch
C stands for open area, percentage
W stands for slot width in inch
L stand for the length of the slot in inch

For example, if the open area of a 4.5″ slotted liner is 3%, the slot width is 0.02 inches, and the slot length is 1.5′, what is the slot count per foot?

The required number of slots is shown below using the calculation above:

N = (12*π *4.5*3) / (100*0.020*1.5) = 172

Nota: This is a straightforward calculation for a straight slot or a seamed keystone slot.

Dimensions and Sizes of Slotted Liner

- Specification & Size of Tubing Slotted Liner

DN O.D. Peso W.T. Fin del proceso
Acoplamiento de rosca sin ajuste Rosca de acoplamiento desajustada Grado de acero
En pulgadas mm lb./ft. lb./ft. En pulgadas mm H40 J55 L80 N80 C90 T95 P110
2 3/8 2.375 60.32 4.00 - 0.167 4.24 PU PN PN PN PN PN -
4.60 4.70 0.190 4.83 PNU PNU PNU PNU PNU PNU PNU
5.80 5.95 0.254 6.45 - - PNU PNU PNU PNU PNU
6.60 - 0.295 7.49 - - P - P P -
7.35 7.45 0.336 8.53 - - PU - PU PU -
2 7/8 2.875 73.02 6.40 6.50 0.217 5.51 PNU PNU - - - - -
7.80 7.90 0.276 7.01 - - - - - - -
8.60 8.70 0.308 7.82 - - PLB PLB PLBE - PLB
9.35 9.45 0.340 8.64 - - PLB PLB PLBE - PLB
10.50 - 0.392 9.96 - - PLB PLB PLB - PLB
11.50 - 0.440 11.18 - - - - PLB -
3 1/2 3.5 88.9 7.70 - 0.216 5.49 PN PN PN PN PN PN -
9.20 9.30 0.254 6.45 PNU PNU PNU PNU PNU PNU PNU
10.20 - 0.289 7.34 PN PN PN PN PN PN -
12.70 12.95 0.375 9.52 - - PNU PNU PNU PNU PNU
14.30 - 0.430 10.92 - - P - P P -
15.50 - 0.476 12.09 - - P - P P -
17.00 - 0.530 13.46 - - P - P P -
4 4 101.6 9.50 - 0.226 5.74 PN PN PN PN PN PN -
- 11.00 0.262 6.65 PU PU PU PU PU PU -
13.20 - 0.330 8.38 - - P - P P -
16.10 - 0.415 10.54 - - P - P P -
18.90 - 0.500 12.70 - - P - P P -
22.20 - 0.610 15.49 - - P - P P -
4 1/2 4.5 114.3 12.60 12.75 0.271 6.88 PNU PNU PNU PNU PNU PNU -
15.20 - 0.337 8.56 - - P - P P -
17.00 - 0.380 9.65 - - P - P P -
18.90 - 0.430 10.92 - - P - P P PLB
21.50 - 0.500 12.70 - - P - P P PLB
23.70 - 0.560 14.22 - - P - P P PLB
26.10 - 0.630 16.00 - - P - P P PLB
P--Plano；N-- Rosca de acoplamiento sin recalcado；U-- Rosca de acoplamiento recalcado； L--Integral
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- Specification & Size of Casing Slotted Liner

DN O.D. Peso W.T. Formulario de mecanizado de extremos
Grado de acero
En pulgadas mm lb/ft kg/m En pulgadas mm H40 J55 L80 N80 C90 P110
K55 T95
4 1/2 4.5 114.3 9.50 14.14 0.205 5.21 PS PS - - - -
10.50 15.63 0.224 5.69 - RSP - - - -
11.60 17.26 0.250 6.35 - PSLB PLB PLB PLB PLB
13.50 20.09 0.290 7.37 - - PLB PLB PLB PLB
15.10 22.47 0.337 9.56 - - - - - PLB
5 5 127 11.50 17.11 0.220 5.59 - PS - - - -
13.00 19.35 0.253 6.43 - PSLB - - - -
15.00 22.32 0.296 7.52 - PSLB PLB PLB PLBE PLB
18.00 26.79 0.362 9.19 - - PLB PLB PLBE PLB
21.40 31.85 0.437 11.10 - - PLB PLB PLB PLB
23.20 34.53 0.478 12.14 - - - - PLB -
24.10 35.86 0.500 12.70 - - - - PLB -
5 1/2 5.5 139.7 14.00 20.83 0.244 6.20 PS PS - - - -
15.50 23.07 0.275 6.98 - PSLB - - - -
17.00 25.30 0.304 7.72 - PSLB PLB PLB PLBE PLB
20.00 29.76 0.361 9.17 - - PLB PLB PLBE PLB
23.00 34.23 0.415 10.54 - - PLB PLB PLBE PLB
26.80 39.88 0.500 12.70 - - - - - -
29.70 44.20 0.562 14.27 - - - - - -
32.60 48.51 0.625 15.88 - - - - - -
35.30 52.53 0.687 17.45 - - - - - -
38.00 56.55 0.750 19.05 - - - - - -
40.50 60.27 0.812 20.62 - - - - - -
43.10 64.14 0.875 22.22 - - - - - -
6 5/8 6.625 168.28 20.00 29.76 0.288 7.32 PS PSLB - - - -
24.00 35.72 0.352 8.94 - PSLB PLB PLB PLBE PLB
28.00 41.67 0.417 10.59 - - PLB PLB PLBE PLB
32.00 47.62 0.475 12.06 - - PLB PLB PLBE PLB
7 7 177.8 17.00 25.30 0.231 5.87 PS - - - - -
20.00 29.76 0.272 6.91 PS PS - - - -
23.00 34.23 0.317 8.05 - PSLB PLB PLB PLBE -
26.00 38.69 0.362 9.19 - PSLB PLB PLB PLBE PLB
29.00 43.16 0.408 10.36 - - PLB PLB PLBE PLB
32.00 47.62 0.453 11.51 - - PLB PLB PLBE PLB
35.00 52.09 0.498 12.65 - - PLB PLB PLBE PLB
38.00 56.55 0.540 13.72 - - PLB PLB PLBE PLB
42.70 63.54 0.625 15.88 - - - - - -
46.40 69.05 0.687 17.45 - - - - - -
50.10 74.56 0.750 19.05 - - - - - -
53.60 79.77 0.812 20.62 - - - - - -
57.10 84.97 0.875 22.22 - - - - - -
7 5/8 7.625 193.68 24.00 35.72 0.300 7.62 PS - - - - -
26.40 39.29 0.328 8.33 - PSLB PLB PLB PLBE PLB
29.70 44.20 0.375 9.52 - - PLB PLB PLBE PLB
33.70 50.15 0.430 10.92 - - PLB PLB PLBE PLB
39.00 58.05 0.500 12.70 - - PLB PLB PLBE PLB
42.80 63.69 0.562 14.27 - - PLB PLB PLB PLB
45.30 67.41 0.595 15.11 - - PLB PLB PLB PLB
47.10 70.09 0.625 15.88 - - PLB PLB PLB PLB
51.20 76.19 0.687 17.45 - - - - - -
55.30 80.30 0.750 19.05 - - - - - -
8 5/8 8.625 219.08 24.00 35.72 0.264 6.71 - PS - - - -
28.00 41.62 0.304 7.72 PS - - - - -
32.00 47.62 0.352 8.94 PS PSLB - - - -
36.00 53.57 0.400 10.16 - PSLB PLB PLB PLBE PLB
40.00 59.53 0.450 11.43 - - PLB PLB PLBE PLB
44.00 65.48 0.500 12.70 - - PLB PLB PLBE PLB
49.00 72.92 0.557 14.15 - - PLB PLB PLBE PLB
9 5/8 9.625 244.48 32.30 48.07 0.312 7.92 PS - - - - -
36.00 53.57 0.352 8.94 PS PSLB - - - -
40.00 59.53 0.395 10.03 - PSLB PLB PLB PLBE -
43.50 64.73 0.435 11.05 - - PLB PLB PLBE PLB
47.00 69.94 0.472 11.99 - - PLB PLB PLBE PLB
53.50 79.62 0.545 13.84 - - PLB PLB PLBE PLB
58.40 86.91 0.595 15.11 - - PLB PLB PLB PLB
59.40 88.40 0.609 15.47 - - - - - -
64.90 96.58 0.672 17.07 - - - - - -
70.30 104.62 0.734 18.64 - - - - - -
75.60 112.50 0.797 20.24 - - - - - -
10 3/4 10.75 273.05 32.75 48.74 0.279 7.09 PS - - - - -
40.50 60.27 0.350 8.89 PS RSP - - - -
15.50 67.71 0.400 10.16 - RSP - - - -
51.00 75.90 0.450 11.43 - RSP RSP RSP PSBE RSP
55.50 82.59 0.495 12.57 - - RSP RSP PSBE RSP
60.70 90.33 0.545 13.84 - - - - PSBE RSP
65.70 97.77 0.595 15.11 - - - - RSP RSP
73.20 108.93 0.672 17.07 - - - - - -
79.20 117.86 0.734 18.64 - - - - - -
85.30 126.94 0.797 20.24 - - - - - -
11 3/4 11.75 42.00 62.50 0.333 8.46 PS - - - - -
47.00 69.94 0.375 20.24 - - - - - -
54.00 80.36 0.435 8.46 - - - - - -
60.00 89.29 0.489 9.53 - - - - - -
65.00 96.73 0.534 11.05 - - - - - -
71.00 105.66 0.582 14.42 - - - - - -
13 3/8 13.375 339.73 48.00 71.43 0.330 8.38 PS - - - - -
54.50 81.10 0.380 9.65 - RSP - - - -
61.00 90.78 0.430 10.92 - RSP - - - -
68.00 101.19 0.480 12.19 - RSP RSP RSP RSP RSP
72.00 107.15 0.514 13.06 - - RSP RSP RSP RSP
16 16 406.4 65.00 96.73 0.375 9.53 PS - - - - -
75.00 111.61 0.438 11.13 - RSP - - - -
84.00 125.01 0.495 12.57 - RSP - - - -
109.00 162.21 0.656 16.66 - P P P - P
18 5/8 18.625 473.08 87.50 130.21 0.435 11.05 PS RSP - - - -
20 20 508 94.00 139.89 0.438 11.13 PSL PSLB - - - -
106.50 158.49 0.500 12.70 - PSLB - - - -
133.00 197.93 0.635 16.13 - PSLB - - - -
P--Plain；S--Hilo corto；L--Hilo largo；B--Hilo de tope；E--Hilo extremo
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Features of Slotted Liner

Slotted liners are filters that block large particles such as gravel and allow oil and gas to pass through. It is widely used in the petroleum industry. First, slotted liners are used in horizontal Wells and high-viscosity reservoirs. Second, steam assisted gravity Drainage (SAGD). Slotted liners are widely used between injection and production Wells. It is also used in gravel pack completions. To ensure the long-term stable production of oil wells.

Applications of Slotted Liner

Slotted liners are well screens with perforations or slots that allow the passage of fluid while preventing the passage of sand and other particulates. They are used in a variety of applications, including well completion, well rehabilitation, and sand control. Slotted liners can be made of steel, stainless steel, aluminum, or plastic, and are available in a variety of sizes and slot configurations. In well completion, slotted liners are used to provide a path for fluid flow and to prevent the wellbore from collapsing. In well rehabilitation, slotted liners can be used to increase production by creating new wellbores or by restoring damaged wellbores. And in sand control, slotted liners are used to prevent the production of sand from wells. Slotted liners are an important tool for oil and gas production, and their applications are continuing to expand.

Línea-Tubo
Tuberías
Suministro de OCTG
OCTG
Tubería-Fabricación-Spooling
Fabricación de acero
tipos de conexiones de tuberías
Accesorios de tubería
1. What Is the Difference between a Plug and a Liner?

A plug functions like a stopper. It is a node or section. The plug seals off a well section, isolating the lower portion. It is inserted into the tubing string of the lower formation to facilitate separate production from the upper reservoir.

A liner is essentially a perforated pipe. Slotted liner is one type of such pipe, featuring numerous narrow slits cut by plasma or laser cutting. Within the wellbore structure, it allows oil and gas to flow while also supporting the wellbore walls.

The primary purpose of a liner is to prevent wellbore collapse. Reservoir formations, often composed of soft sandstone, frequently cause wellbore collapse and blockage. Thus, the liner’s function is to support the wellbore walls, keeping the wellbore open and unobstructed.

The ultimate goal of slot insulation in slotted liners is to enable long-term, stable oil production. It prevents complete blockage of the slots, maintains consistent flow performance, and maximizes the liner’s ability to control sand and direct flow.

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