H.P. Well Screen
Sand Control
COMPANY H.P. Well Screen is a one of Europe’s largest manufacturers in sand control products for the Oil & Gas and Water industry. Throughout our more than 20 year history, from which the first 8 years as Houston Well Screen, we became an independent organization offering a complete range of well screen products and slotting & perforating services.
Our strength not only rests with our products and service, but with the skills of our people, the technical knowledge and our 20 years of experience in the field. We are recognized for our excellence in customer solutions, creativity, flexibility and no-nonsense mentality, coupled with short delivery times and competitive prices.
The manufacturing capabilities of our production plant in Holland enables us to respond quickly to any demand for any well in Europe, Russia, Africa and the Middle East.
In 2002 H.P. Well Screen inaugurated a new 3000 square meter production facility with the latest technology of manufacturing equipment.
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SAND CONTROL SOLUTION Production reliability is essential in offshore and maximum productivity is important anywhere. The control of sand flow in unconsolidated formations can be one of the most critical problems in down-hole well completion. The sand control technology has developed over the years involving chemical and mechanical solutions. Still the simplest and by far the most reliable and effective method of sand control is the use of sand-retention:
SLOTTED LINERS
&
WELL SCREENS
Nowadays an open hole completion with stand alone screens is a well balanced solution for highly deviated and horizontal wells where sand control has to be achieved without gravel packing. H.P. Well screen is your partner providing a total range of sand-retention products starting from slotted liners to pre-packed screens.
All our products will bring you: A low risk of plugging. A high inflow area.
The ability to produce fines allowing increased well productivity.
A simple installation, similar as running liners. A mechanical robustness. Low total costs compared to wire mesh or
expendable screen types and techniques where fluid pumping is involved. All products from H.P. Well Screen have precise slot openings. They can be used directly in the formation as a stand alone screen, with any further assistance of gravel packs. To choose the most suitable sand control product, the following factors need to be considered. Still, the most important single design factor of any sand retention product is the correct sizing of the slot opening in relation to the formation grain size.
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WELL SCREEN DESIGN AND SLOT SIZE The design objective for well screens is stoppage of sand infiltration without excessive reduction of flow capacity. In order to determine the proper gauge for well screens, as well as, the proper gravel pore space, the formation grain size must be known.
Without Gravel Pack
In this situation the sand control is base on the bridging theory and slot openings must be sized in direct relationship to the formation sands. Sand bridges are formed across the slot opening when the slot opening is about 2 times the sand grain diameter, preventing further particle movement. If the size of the grains varies, retention of the larger particles causes smaller particles to bridge behind them. To achieve stable bridges the individual sand grains should bridge on, rather than in, the slot openings. In formations with relatively coarse-grained, high-permeability sands, controlling sand and maintaining the well’s productivity is successful when a certain amount of formation sand can be tolerated. In stand-alone screen completions without the use of back-surging or pump-in treatments, the finer particles are not effective removed from the sand-face of the near-wellbore sand mass. If these particles are retained on the screen/slotted liner, they can eventually plug it and reduce well productivity. However, if they flow through the screen or slotted liner and do not plug it or form a sand-plug in the well, the well will produce indefinitely despite the fact that sand production has not been completely eliminated. For sands with a broad size distribution, a generally accepted guideline for designing a screen is to specify a slot width that is 2 times as large as the 10 percentile grain diameter. This sizing allows the finer particles to be produced, resulting in a natural gravel pack formed from the larger sand grains. For more uniform sands, screen openings equal to the 10-15 percentile formation sand diameter should be used. For a good result for non-uniform fine sand, we can take the 40 percentile sand diameter analysis. The recommended slot opening can be read off the horizontal scale.
(The “10% diameter” is the sieve size through which 90%, by weight, of the total formation sample will pass)
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With Gravel pack
Gravel packing is probably the most popular mechanical sand-control technique used in water, oil and gas wells. The gravel pack stabilizes the borehole and filters the formation sand from the flow, while producing only very fine particles that can move through the gravel pack. Screens or slotted liners used in combination with a gravel pack function as a gravel retention device and need a different design. Ideally, slots should be as wide as possible while retaining gravel without restricting flow of fluids and interstitial fines. The loss of even a small amount of gravel may have a negative effect on the completion. Therefore, slot openings need to be sized for complete gravel retention. Proper sizing can be determined from sieve analysis of the gravel.
Example of a gravel pack design
The slot should not be wider than 50% to 70% of the smallest gravel-size diameter to avoid production of gravel. Because the flow capacity of screens and slotted liners are high, sizing the slot width on the low side will not restrict well productivity and will tend to avoid production of gravel.
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WELL SCREEN DESIGN AND FLOW A screen/slotted liner is a surface separation media allowing a free flow of liquids. The comparison between different screen structures can be made comparing the permeability of the screen: Open area and pressure loss
Slot width
Open Area Screen (%) Open Area Slotted liner (%)
x 100
Slot width + Wire width Slots/ft x Slot width x Slot length x 100 Outside diameter x p x 12
Pressure loss (bar) V = Velocity trough screen - OA = Open area - g = 9,81
V2
x (1,8 - OA/100) 2
20 x g
Profile Wires
For other sizes please contact our sales department Open area (%)
Support Rods
For other sizes please contact our sales department Slot opening (µm)
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WELL SCREEN DESIGN AND STRENGTH The collapse resistance of single screen with a normal radial construction:
Collapse ? P (bar)
(He/OD)3 x 220 x 19600 x (1 - OA/100)
He = Equivalent height wire - OD = Outside diameter - OA = Open area
The tensile strength of normal single screen:
Tensile (tons)
A-rod x N-rod x Rm 1000
A-rod = Square cut surface of rod - N-rod = Number of rods - Rm = Tensile material (kg/mm 2)
WELL SCREEN DESIGN AND MATERIALS We manufacture our screen products according to customer requirements. The casing, liners or base pipe can be selected from standard API grade K55 up to 110cr13 for special conditions. In particular corrosive or hot environments, a special alloy may be selected. The well screens can be manufactured from Stainless steel 304, 316L, 904L, Duplex, Superduplex, Hastelloy C276, SMO etc. We keep in stock many exotic materials, so please do not hesitate to ask for specific requirements. Contrary to the un- and low alloyed steels, stainless steel is not so much exposed by a general abrasive corrosion over the full surface, but would under certain circumstance suffer from a selective corrosion. In order to meet Pitting and Stress Cracking corrosions a great number of steels and alloys have been developed. For strains caused by chlorides the use of steels with raising chromium and molybdenum contents is recommended. For strains caused by sulfide all copper- nickel alloys offer higher resistance then the alloys with increased molybdenum contents.
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QUALITY The professional staff at H.P. Well Screen has more than twenty years of experience in manufacturing sand control products for oil & gas and water wells. Skilled welders, machine operators and technicians work as a team to meet the highest industry standards. The screens are manufactured in compliance with ISO 9001 : 2000 QMS standards according to customer supplied requirements.
Slot-control, torsion, load, tensile and collapse tests are all part of our program to ensure the high quality of our products and to maintain your confidence.
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PRODUCTS Our products can de divided into 5 primary product groups:
SLOTTED LINERS
Cost-e ffe ctive for ling comple tions or low productivity we lls
PE RFORATED CASING Strong and e conomical
R OD- BAS E SCR EEN S
High flow capacity in combination w ith small slot w idths
PIP E BASE-BASE SCREEN
High flow capacity combine d w ith high te nsile , collapse and torsion
PR EPACKED SCREENS
Ensure s grave l packing and provide s e xce lle nt sand control for fine s.
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SLOTTED LINER The H.P. Well Screen Slotted Liner is a robust and cost-effective solution for long completions or low productivity wells. The slotted liner is manufactured with the fastest multi spindle slotting equipment in the world. The 40ft- 80-spindel milling machine produces slots in one pass over the entire length of the joint. We can handle joints with length up to range 3 and diameters from 1.9” up to 95/8”.
We offer straight and keystone slot types in a wide range of slotting patterns to create the required open area.
STRAIGHT SLOT
KEYSTONE SLOT
Cut straight on the
Cut under a 6º angel,
center, this conventional slot does not wear out.
SLOT WIDTH SLOT LENGTH
250µ
to
6 mm
38 - 50 - 63 - 76 mm
this V-shaped slot is non-clogging.
0,01” to
0,236”
1,5” - 2” - 2,5” - 3”
Upon request, we can cut any length of slot in any width.
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Both slot types can be cut in the line-pattern and the staggered-pattern. With the multiple patterns the open area can be increased by 4 times compared to single cut pattern.
Line
Multiple line
Multiple
Staggered
staggered
Every joint slotted by H.P. Well Screen is deburred internal and external and drift tested according to API standards. Every slot is visually inspected and cleaned of burr material. All threads and couplings are thoroughly cleaned and lubricated. The size, grade and weight of the base-pipe are according to A.P.I. casing or tubing specification.
Required slots/ft to obtain 3% open area
Slot Width (mm)
Slot Width (inch)
3.5” Liner
4.5” Liner
5,5” Liner
7” Liner
0,30
0.012
220
284
348
440
0,38
0.015
176
228
276
352
0,45
0.018
148
188
232
296
0,50
0.020
132
172
208
264
0,63
0.025
108
136
168
212
0,70
0.028
96
124
148
188
1,00
0.038
52
68
84
104
1,50
0.058
36
44
56
68
3,00
0.125
16
24
28
32
6,00
0.250
8
12
16
16
For other sizes or more detailed information please contact our sales department.
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PERFORATED CASING The H.P. Well Screen Pre-perforated Casing is manufactured with a 44ft- 88-spindel Drill Press. Joints with sizes up to diameter 18” and length Range 3 and grades up to 13Cr110 are perforated in one handling.
Our precise repeating, spiral and staggered patterns are perforated with Ø ? ” and Ø ½” diameter holes, to create the required open area.
Upon
request,
we
can
drill
standard or customized hole sizes in any number and any pattern.
Every joint perforated by H.P. Well Screen is deburred internal and external and drift tested according to API standards. Every hole is visually inspected and cleaned of burr material.
The size, grade and weight of the base-pipe are according to A.P.I. casing or tubing specification. Example:
Pipe in stainless steel 304 or 316
API Pipe Size
OD Pipe (mm)
ID Pipe Sch40 (mm)
ID Pipe Sch80 (mm)
OD Coupling (mm)
Holes per foot Standard pattern
2? 27/8 3½ 4½ 5½ 65/8 85/8
60,33 73,03 88,90 114,30 141,30 168,30 219,08
52,51 62,71 77,92 102,26 128,20 154,08 202,72
49,25 59,01 73,66 97,18 131,77 146,36 193,68
73,0 88,9 108,0 127,0 153,7 187,7 244,5
84 96 108
168 192 204 240
For sizes up to 18” or more detailed information please contact our sales department.
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ROD-BASE SCREEN The Rod-Base Screen is manufactured by wrapping a profile wire cylindrical around longitudinal placed support rods creating a V-shaped nonclogging slot opening.
The H.P. Well Screen Rod-Base Screen design provides:
Maximum flow capacity. Minimum pressure drop. Accurate slot widths.
Strong construction. Superior corrosion resistance. The result is a greater efficiency in your well and a longer well-life. The size, grade and construction of the screen are selected according to customer specifications and available in Pipe and Telescope Sizes. (See also table below) The selection of the grade can be made from standard SS304 and SS316L to Duplex SS or other exotic alloys. The standard and custom made fittings are rigidly welded to the screen according to nace-specifications. Example:
Rod-Base Screen in stainless steel 304 or 316
API Size
OD Screen (mm)
ID Screen (mm)
Approx. Shipping weight (kg/m)
OD Telescope screen (mm)
ID Telescope screen (mm)
Approx. Shipping weight (kg/m)
2? 27/8 3½ 4 4½ 5½ 65/8 85/8
60,0 73,4 88,4 99,9 116,4 140,4 168,9 219,8
46,5 57,2 72,0 83,6 99,1 124,2 151,0 204,0
6 7,5 13,0 15 16,5 18 21 29
46,0 57,1 70,6 85,0 91,7 120,0 143,2 187,0
32,0 48,3 60,7 75,1 97,6 110,1 131,1 173,1
5 6 7,5 12 13,5 17 18 24
For sizes up to 24” or more detailed information please contact our sales department.
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PIPE-BASE SCREEN The H.P. Well Screen Pipe-Base Screen is an excellent combination of a highly perforated basepipe and a tight-fit screen jacket. The H.P. Well Screen Pipe-Base Screen design combines:
Tensile, load, collapse strength. Rotating ability during installation. High flow capacity.
Very accurate slot opening.
Minimum risk cementing up. Uncomplicated installation.
The result is reliable solution for sand free production in vertical and horizontal wells. The size, grade and weight of the base-pipe are according to A.P.I. casing or tubing specification. (see also table below) The selection of the grade can be made from standard SS304 Screens and J/K55 base-pipes up to 13Cr110, Duplex SS or other alloys. The fixation of the slip-on screen can either be done by welding or shrink fitting end-rings to the base-pipe. Example:
PI Pipe Size
2? 27/8 3½ 4½ 5½ 65/8 85/8
Pipe-Base Screen in stainless steel 304 or 316 OD Pipe (mm)
60,33 73,03 88,90 114,30 141,30 168,30 219,08
ID Pipe Sch40 (mm)
ID Pipe Sch80 (mm)
OD Screen (mm)
OD Coupling (mm)
52,51 49,25 62,71 59,01 77,92 73,66 102,26 97,18 128,20 131,77 154,08 146,36 202,72 193,68
70,6 85,0 101,9 133,0 150,2 180,4 232,2
73,0 88,9 108,0 127,0 153,7 187,7 244,5
Open area screen (cm2/m) 0,1 mm slot
138,6 166,9 200,1 219,8 248,2 298,1 383,7
0,3 mm slot
0,5 mm slot
369,5 554,5 444,9 667,6 533,3 800,3 597,1 908,4 674,3 1025,8 809,9 1232,1 1042,4 1585,9
For sizes up to 16” or more detailed information please contact our sales department.
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PREPACKED SCREEN The H.P. Well Screen Prepacked screens are available in to designs: Rod-base and Pipe-base The prepacked screen provides sand control when gravel packing is not feasible. A special slim pack design is used for reduced ID running environments. The filter media available include re-sieved or resin coated gravel can be heat treated consistent bond.
for
and a
The H.P. Well Screen Prepack screen design ensures:
A complete gravel packing around the screen in horizontal wells. A pack without bridges or voids. A closer contact with the aquifer improving well efficiency. (Slim-pack) A pack with filter medium sized to that particular Well.
The size, grade and weight of the base-pipe are according to A.P.I. casing or tubing specification. (see also table below) The selection of the grade can be made from standard SS304 Screens and J/K55 base-pipes up to 13Cr110, Duplex SS or other alloys. The fixation of the slip-on screen can either be done by welding or shrink fitting end-rings to the base-pipe. Example:
Prepacked Screen in stainless steel 304 or 316
API Pipe Size
OD Pipe (mm)
2? 27/8 3½ 4½ 5½ 65/8 85/8
60,33 73,03 88,90 114,30 141,30 168,30 219,08
ID Pipe Sch40 (mm)
OD Pipe Sch80 (mm)
52,51 49,25 62,71 59,01 77,92 73,66 102,26 97,18 128,20 131,77 154,08 146,36 202,72 193,68
OD screen Thin Pack (mm)
OD Screen Conventional Pack (mm)
OD coupling (mm)
78,0 90,7 106,6 132,0 157,4 180,4 232,2
114,3 127,0 139,7 165,1 199,4 -
73,0 88,9 108,0 127,0 153,7 187,7 244,5
For other sizes or more detailed information please contact our sales department.
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