CN112647901A - Sand control screen pipe and application thereof - Google Patents

Sand control screen pipe and application thereof Download PDF

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Publication number
CN112647901A
CN112647901A CN201910969887.8A CN201910969887A CN112647901A CN 112647901 A CN112647901 A CN 112647901A CN 201910969887 A CN201910969887 A CN 201910969887A CN 112647901 A CN112647901 A CN 112647901A
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CN
China
Prior art keywords
hot melt
sand control
melt adhesive
control screen
expandable
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CN201910969887.8A
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Chinese (zh)
Inventor
段友智
刘欢乐
何祖清
岳慧
艾爽
侯倩
罗燕
秦星
孙鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
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Priority to CN201910969887.8A priority Critical patent/CN112647901A/en
Publication of CN112647901A publication Critical patent/CN112647901A/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • E21B43/082—Screens comprising porous materials, e.g. prepacked screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • E21B43/086—Screens with preformed openings, e.g. slotted liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Abstract

The invention provides a sand control screen pipe which comprises a base pipe and an expandable permeation filtering layer covering the base pipe, wherein the expandable permeation filtering layer is formed by compounding polyurethane foam and hot melt adhesive. The sand control screen pipe utilizes the dissolution of the outermost tension layer which is controlled by the dissolution liquid and the temperature, combines the advantages of simple and reliable completion process of the independent screen pipe, high precision of annular filling and sand blocking of gravel filling completion and long period of validity, has certain supporting force for the well wall, effectively prevents or slows down the sand production of the stratum, and can realize the sand control treatment of a plurality of production layers at one time.

Description

Sand control screen pipe and application thereof
Technical Field
The invention belongs to the technical field of sand control of petroleum and natural gas well completion, and relates to a sand control screen pipe applied to oil, gas and water wells for sand control and well completion.
Background
The sand production of the oil and gas well seriously influences the normal production of the sandstone reservoir oil and gas well, and the mechanical sand control completion process is one of the main methods for solving the sand production problem: one is to put sand-proof pipe column to block sand, such as slotted liner pipe, wire-wound screen pipe, and sand filter prefabricated and formed on various ground, and the other is to put sand-proof pipe column to add filling material, which is gravel. In addition, chemical sand control is also a method for solving sand production, a certain amount of chemical agent is squeezed into the stratum and filled in the pores of the stratum, so that the aim of filling and consolidating the stratum and further improving the strength of the stratum is achieved, but certain pollution is brought to the stratum.
At present, with the development of the sand control completion process and the research and development of a novel sand control screen pipe, the outer diameter of the screen pipe is enlarged or the size of the screen pipe is expanded through a tool in the well, so that the novel expandable sand control screen pipe filled with annular space is realized, and the novel expandable sand control screen pipe is applied in the well. The screen pipe adopts the process of the independent screen pipe well completion process, obtains the gravel filling well completion annulus filling sand prevention effect, and has the advantages of simple process, short well completion period, high sand prevention precision and long validity period. However, most of the current expanded screens require a special swelling tool, such as patent CN 103967456a, to be run in from bottom to top for swelling, the swelling does not have a certain thickness after swelling, and the swelling effect of the whole sand control interval needs to be further improved.
The patent CN 12224321A-shape memory polyurethane foam for underground sand control filter device is disclosed in the P.section and P.M.Moslerferk of the national Beckhols company. The patent adopts polycarbonate polyurethane shape memory polyurethane, and the ground compresses foam by a mould above the glass transition temperature of the ground in advance; cooling to room temperature, and shaping into high-density small-volume foam; and (4) conveying the foam to a downhole design position, and heating the foam to be above the glass transition temperature to expand the foam to be used as the sand filtering foam of the oil well. In the process of synthesizing the material, the material is endowed with a thermotropic shape memory function by controlling the glass transition temperature of the soft section of the foam material, so that the foam volume memory is realized. The following problems exist in the using process: (1) the shape memory polyurethane foam can be repeatedly subjected to volume compression and volume recovery, but the cost is high, and the large range of the shape memory polyurethane foam in an oil field is limited; (2) the application of the filtering device requires compression of the hollow cylinder formed by the material, and the processing technology is relatively complex.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the sand control screen pipe which has the advantages that the ground surface can be compressed, the one-time action volume expansion performance is realized in the bottom hole environment, and the sand control screen pipe can be filled in the underground annular space without external force. When the sand control screen pipe and the well completion pipe string are connected together and are put to a designed position at the bottom of a well, the dissolution of the outermost tension layer is controlled by using the dissolution liquid and the temperature, and after the dissolution of the outermost tension layer is finished, the expandable infiltration filtering layer is tightly attached to the inner wall of the production casing or the wall of an open hole well through temperature expansion, so that the operation requirement of 'zero annulus' is met. Due to the existence of zero annulus and the interference expansion of the sieve tube, the purposes of sand prevention and well wall stability improvement are achieved, and meanwhile, the corrosion and erosion of the base tube by fluid are slowed down.
According to a first aspect of the present invention, the sand control screen comprises a base pipe, and an expandable permeation filtration layer covering the base pipe, wherein the expandable permeation filtration layer is compounded from polyurethane foam and hot melt adhesive.
According to some embodiments of the present invention, the polyurethane foam is present in an amount of 3 to 97% by mass, for example, 3%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 97% by mass, based on the total weight of the polyurethane foam and the hot melt adhesive, and if the proportion of the polyurethane foam is less than 3%, the permeability of the formed expandable permeation filtration layer will be low, and the additional resistance of the oil well during production will increase; if the proportion of the polyurethane foam is more than 97 percent, and the 50 percent compressive strength after the polyurethane foam is compressed to 50 percent is less than 0.003, the strength of the material can not meet the requirement of long-term production in a well.
According to some embodiments of the present invention, the polyurethane foam is present in an amount of 15 to 85% by weight, based on the total weight of the polyurethane foam and the hot melt adhesive.
According to some embodiments of the invention, the polyurethane foam has a density of 0.1 to 0.26g/cm3。
According to some embodiments of the invention, the polyurethane foam has an open cell content of 85 to 99%.
According to some embodiments of the invention, the polyurethane foam has a 50% compressive strength of 0.001 to 2 MPa.
According to some embodiments of the invention, the polyurethane foam has an average pore size of 0.01 to 10 nm.
According to some embodiments of the invention, the polyurethane foam has a melting temperature of 100-300 ℃.
According to some embodiments of the present invention, hot melt adhesives may employ polymers that change their physical state with changes in temperature over a range of temperatures.
According to some embodiments of the present invention, the hot melt adhesive is selected from one or more of SIS hot melt adhesive, polyurethane hot melt adhesive, EVA hot melt adhesive, aqueous polyurethane hot melt adhesive, PA hot melt adhesive, and reactive polyurethane hot melt adhesive.
According to some embodiments of the present invention, the SIS hot melt adhesive (styrene-isoprene-styrene copolymer) has a melting temperature of 35 ± 5 ℃.
According to some embodiments of the present invention, the melting temperature of the polyurethane hot melt adhesive is 65 ± 5 ℃.
According to some embodiments of the invention, the EVA (ethylene vinyl acetate) hot melt adhesive has a melting temperature of 85 ± 5 ℃.
According to some embodiments of the present invention, the melting temperature of the aqueous polyurethane hot melt adhesive is 90 ± 5 ℃.
According to some embodiments of the invention, the melting temperature of the PA hot melt adhesive (nylon) is 135 ± 5 ℃.
According to some embodiments of the present invention, the melting temperature of the reactive polyurethane hot melt adhesive is 165 ± 5 ℃.
According to some embodiments of the present invention, the hot melt adhesive has a melting temperature that is lower than the melting temperature of the polyurethane foam.
According to some embodiments of the invention, the expandable permeate filter layer is pressed from polyurethane foam and hot melt adhesive in a laminating device.
According to some embodiments of the present invention, polyurethane foam and hot melt adhesive are uniformly mixed in a container, and the mixture is added into a rolling device, the outer diameter is large at the beginning, and the required outer diameter can be achieved only through multiple rolling. The rolling frequency is adjusted according to the actual condition, and the rolling can be realized only by realizing the target.
According to some embodiments of the invention, the crushing apparatus is a multi-lobed sizing apparatus.
According to some embodiments of the invention, the milling apparatus is selected from one or more of apparatuses capable of sizing hollow cylinders.
According to some embodiments of the invention, the temperature of the pressing is 90-150 ℃.
According to some embodiments of the invention, the pressing time is adjusted according to the actual required outer diameter
According to some embodiments of the invention, the pressing time is 12-24 h.
In some preferred modes of the invention, the polyurethane foam and the liquid hot melt adhesive in a molten state are shaped into an approximately round polygonal hollow cylinder through a multi-petal type shaping device, and the hot melt is cooled to be in a gel fixing type.
According to the invention, the expandable permeation filtering layer is finally prepared by repeatedly rolling the polyurethane foam and the hot melt adhesive in a specific ratio through rolling equipment, and compared with the two-step process (first-step forming and second-step compression forming) in the prior art, the expandable permeation filtering layer can be directly formed, and the process is simple.
According to some embodiments of the invention, the base pipe is selected from one or more of a slotted base pipe and a perforated base pipe.
According to some embodiments of the invention, the expandable permeable filtering layer covers the base pipe in multiple sections, preferably 3-6 sections, and the expandable permeable filtering layer is connected in multiple sections, so that the expandable permeable filtering layer is convenient to process on one hand, and can be expanded better to reduce the end effect on the other hand.
According to some embodiments of the invention, the two expandable osmotic filtration layers are secured together by a snap ring.
According to some embodiments of the invention, the sand control screen further comprises a tensile layer encasing the expandable permeable filtration layer, the tensile layer selected from one or more of a fluid soluble polymer membrane and a thermally fluid degradable plastic layer.
According to some embodiments of the invention, the tensioning layer has a melting temperature that is 10-30 ℃ higher than an expansion temperature of the expandable permeation filtration layer.
The term "thermally fluid degradable plastic" in the present invention refers to any rigid solid polymer film, coating or covering that is degradable when subjected to a fluid such as water or a hydrocarbon or a combination thereof and heat.
According to some embodiments of the invention, the tension layer is made by thoroughly mixing polyurethane foam (70-80% by mass) having a relatively high melting temperature and calcium carbonate (20-30% by mass).
According to some embodiments of the invention, the tension layer has certain constraint force, good wear resistance and hydrolysis performance, and plays roles in fixing and protecting the whole annular self-filling sand control screen pipe, and the outer tension layer can avoid the phenomenon because the thermosol is softened or melted and even lost along with the increase of temperature in the well entering process and is easy to expand halfway; in the well entering process, the outer tensioning layer has good wear resistance, so that the well wall can be prevented from wearing the expandable permeation filtering layer; in addition, the outer tensioning layer can be degraded in the underground environment, so that the hot melt adhesive in the expandable permeation filtration layer is melted at a certain temperature, the tensioning constraint on the elastic body is lost, and the elastic body is elastically expanded to fill the annular space.
According to some embodiments of the invention, the outer tensile layer degrades in two ways: one is to dissolve the tension layer by using special circulating liquid, and the other is to automatically dissolve the tension layer by the bottom hole temperature.
According to some embodiments of the invention, the sand control screen further comprises a screen disposed between the base pipe and the expandable permeable filtration layer.
According to some embodiments of the invention, the screen is a metal screen made of stainless steel, which maximizes the reduction of screen plugging during production by increasing the filtration area and flow area.
According to some embodiments of the present invention, the base pipe is perforated on the casing or oil pipe, the circular holes are spirally distributed, and the specific numerical values of the hole diameter and the hole density are determined according to the type of the oil reservoir, and the main function of the base pipe is to support the empty self-filling sand control screen pipe.
According to some embodiments of the invention, in the base pipe, in order to further improve the sand blocking performance, a cross frame can be added in the holes of the perforated pipe, and the structure is mainly used for three-opening sand control completion, so that the processing technology of the sand control screen pipe is simplified, and the cost is reduced; the filter screen can effectively avoid the erosion of the base pipe, and improve the seepage performance and the well completion validity period.
According to some embodiments of the invention, the base pipe can be replaced by a slotted base pipe, the parameters of the slotted base pipe such as the length, width and density of the slots are determined according to the actual oil reservoir parameters, the structure is mainly used for secondary sand control well completion, a filter screen layer can be omitted, the thickness of an expandable permeation filter layer can be effectively increased in a limited space, the running and annular space dense filling are facilitated, and the requirement of large-drift-diameter well completion is met.
In some preferred embodiments of the present invention, the sand control screen is shown in fig. 1 and comprises a base pipe, a filter screen, an expandable permeable filter layer and an outer tension layer, wherein the innermost layer is the base pipe 2, the second layer from inside to outside is the filter screen 4, the third layer from inside to outside is the expandable permeable filter layer 6, the outermost layer is the tension layer 7 coated or wrapped on the outer layer, the connection between the two self-expanding screens is realized through a coupling 1, the left side is fixed through a left end ring 3, the right side is fixed through a right end ring 8, and the two expandable permeable filter layers are fixed through a snap ring 5.
In the actual well completion process, a drill pipe or an oil pipe is used for conveying the self-expansion screen pipe completion pipe string to a target layer, a hanging packer is set and hung, mud cakes are cleaned through positive circulation well completion fluid, the blockage of a near well zone is removed, the permeability is improved, meanwhile, an outer tensioning layer of the annular self-filling sand control screen pipe is dissolved, the expandable permeation filtering layer is excited through temperature, the expandable permeation filtering layer is expanded and is tightly attached to the wall of an open hole well or the wall of a sleeve well, the annular dense filling is realized, the hanging packer is set and sealed, the drill pipe is taken out, and the well completion is.
The sand control screen pipe has the following functions:
(1) the sand control screen pipe has the function of preventing sand.
(2) The sand control screen pipe has a simple structure and a relatively short construction period.
(3) The dissolution of the outermost tension layer is controlled by using the dissolution liquid and the temperature.
(4) By expanding the expandable osmotic filter layer to tightly fit against the inner wall of the production casing or the wall of the open hole, not only can the annulus be filled, but also the wall of the hole can be supported.
Drawings
FIG. 1: the cross section of the sand control screen pipe comprises 1-coupling, 2-base pipe, 3-left end ring, 4-filter screen, 5-snap ring, 6-expandable permeable filtering layer, 7-outer tensioning layer and 8-right end ring.
FIG. 2: the radial section of the sand control screen pipe comprises 9-base pipe, 10-filter screen, 11-expandable permeation filtering layer, 12-outer tensioning layer and 13-snap ring.
FIG. 3: the cross frame structure in the base pipe hole is schematically shown.
FIG. 4: a cross-sectional view of a slotted base pipe.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Reagents and equipment:
polyphenylmethane polyisocyanate (PAPI): products of carnos technologies, ltd;
polyoxypropylene glycol: zhejiang Huafeng new materials, product of GmbH;
polyoxypropylene triol: products of Moore chemical Co., Ltd;
1, 4-Butanediol (BDO): products of Yarui chemical Co., Ltd, Zhang hong Kong;
polyoxypropylene ethylene oxide copolyether: products of Wuhan Fuxin Yuanzhi Co., Ltd;
polyurethane hot melt adhesive: plastic materials Limited;
rolling equipment: bohui world wide heavy industry machinery, llc.
Example 1
Preparation of polyurethane foam:
1: weighing phenyl methane polyisocyanate (PAPI), polyoxypropylene diol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene-ethylene oxide copolyether for later use according to a proportion, wherein the mass fraction of the polyphenyl methane polyisocyanate is 30%; the mass fraction of the polyoxypropylene glycol was 30%; the mass fraction of the polyoxypropylene triol is 30 percent; the mass fraction of 1, 4-Butanediol (BDO) is 5 percent; the mass fraction of the polyoxypropylene-ethylene oxide copolyether is 5 percent.
2: adding phenyl methane polyisocyanate (PAPI), polyoxypropylene glycol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene ethylene oxide copolyether into a reaction kettle in the step 1, mixing and reacting the materials, wherein the mixing and reacting time is 0.5-0.6 h, the mixing and reacting temperature is controlled to be 45-85 ℃, the rotating speed of a stirrer is 1000 plus materials and 1200 rpm, obtaining polyurethane foam after the reaction is finished, and specifically, the performances of the polyurethane foam are listed in Table 1.
Preparation of the expandable permeation filtration layer:
the synthesized polyurethane foam and the polyurethane hot melt adhesive (the melting temperature is 65 +/-5 ℃) are mixed and uniformly stirred in a container according to the preset mass ratio (the mass content of the polyurethane foam is 3% based on the total weight of the polyurethane foam and the hot melt adhesive), then the mixture is added into rolling equipment (multi-petal type shaping equipment) for pressing, the temperature is controlled to be between 90 and 150 ℃, the temperature is required to be lower than the melting temperature of the polyurethane foam, the outer diameter is large at the beginning, the expandable permeation filtration layer is prepared after 12 hours and 4 times of rolling, and the specific performance of the expandable permeation filtration layer is listed in table 2.
Example 2
Preparation of polyurethane foam:
1: weighing phenyl methane polyisocyanate (PAPI), polyoxypropylene diol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene-ethylene oxide copolyether for later use according to a proportion, wherein the mass fraction of the polyphenyl methane polyisocyanate is 35%; the mass fraction of the polyoxypropylene diol is 50%; the mass fraction of the polyoxypropylene triol is 10 percent; the mass fraction of 1, 4-Butanediol (BDO) is 2 percent; the mass fraction of the polyoxypropylene-ethylene oxide copolyether is 3 percent.
2: adding phenyl methane polyisocyanate (PAPI), polyoxypropylene glycol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene ethylene oxide copolyether into a reaction kettle in the step 1, mixing and reacting the materials, wherein the mixing and reacting time is 0.5-0.6 h, the mixing and reacting temperature is controlled to be 45-85 ℃, the rotating speed of a stirrer is 1000 plus materials and 1200 rpm, obtaining polyurethane foam after the reaction is finished, and specifically, the performances of the polyurethane foam are listed in Table 1.
Preparation of the expandable permeation filtration layer:
the synthesized polyurethane foam and the polyurethane hot melt adhesive (the melting temperature is 65 +/-5 ℃) are mixed and uniformly stirred in a container according to the preset mass ratio (the mass content of the polyurethane foam is 15% based on the total weight of the polyurethane foam and the hot melt adhesive), then the mixture is added into rolling equipment (multi-petal type shaping equipment) for pressing, the temperature is controlled to be between 90 and 150 ℃, the temperature is required to be lower than the melting temperature of the polyurethane foam, the outer diameter is large at the beginning, the expandable permeation filtration layer is prepared after 15 hours and 5 times of rolling, and the specific performance of the expandable permeation filtration layer is listed in table 2.
Example 3
Preparation of polyurethane foam:
1: weighing phenyl methane polyisocyanate (PAPI), polyoxypropylene diol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene-ethylene oxide copolyether for later use according to a proportion, wherein the mass fraction of the polyphenyl methane polyisocyanate is 40%; the mass fraction of the polyoxypropylene glycol is 40%; the mass fraction of the polyoxypropylene triol is 10 percent; the mass fraction of 1, 4-Butanediol (BDO) is 5 percent; the mass fraction of the polyoxypropylene-ethylene oxide copolyether is 5 percent.
2: adding phenyl methane polyisocyanate (PAPI), polyoxypropylene glycol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene ethylene oxide copolyether into a reaction kettle in the step 1, mixing and reacting the materials, wherein the mixing and reacting time is 0.5-0.6 h, the mixing and reacting temperature is controlled to be 45-85 ℃, the rotating speed of a stirrer is 1000 plus materials and 1200 rpm, obtaining polyurethane foam after the reaction is finished, and specifically, the performances of the polyurethane foam are listed in Table 1.
Preparation of the expandable permeation filtration layer:
the synthesized polyurethane foam and the polyurethane hot melt adhesive (the melting temperature is 65 +/-5 ℃) are mixed and uniformly stirred in a container according to the preset mass ratio (the mass content of the polyurethane foam is 25% based on the total weight of the polyurethane foam and the hot melt adhesive), then the mixture is added into rolling equipment (multi-petal type shaping equipment) for pressing, the temperature is controlled to be between 90 and 150 ℃, the temperature is required to be lower than the melting temperature of the polyurethane foam, the outer diameter is large at the beginning, the expandable permeation filtration layer is prepared after 18 hours and 6 times of rolling, and the specific performance of the expandable permeation filtration layer is listed in table 2.
Example 4
Preparation of polyurethane foam:
1: weighing phenyl methane polyisocyanate (PAPI), polyoxypropylene diol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene-ethylene oxide copolyether for later use according to a proportion, wherein the mass fraction of the polyphenyl methane polyisocyanate is 45%; the mass fraction of the polyoxypropylene diol is 35%; the mass fraction of the polyoxypropylene triol is 10 percent; the mass fraction of 1, 4-Butanediol (BDO) is 5 percent; the mass fraction of the polyoxypropylene-ethylene oxide copolyether is 5 percent.
2: adding phenyl methane polyisocyanate (PAPI), polyoxypropylene glycol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene ethylene oxide copolyether into a reaction kettle in the step 1, mixing and reacting the materials, wherein the mixing and reacting time is 0.5-0.6 h, the mixing and reacting temperature is controlled to be 45-85 ℃, the rotating speed of a stirrer is 1000 plus materials and 1200 rpm, obtaining polyurethane foam after the reaction is finished, and specifically, the performances of the polyurethane foam are listed in Table 1.
Preparation of the expandable permeation filtration layer:
the synthesized polyurethane foam and the polyurethane hot melt adhesive (the melting temperature is 65 +/-5 ℃) are mixed and uniformly stirred in a container according to the preset mass ratio (the mass content of the polyurethane foam is 40% based on the total weight of the polyurethane foam and the hot melt adhesive), then the mixture is added into rolling equipment (multi-petal type shaping equipment) for pressing, the temperature is controlled to be between 90 and 150 ℃, the temperature is required to be lower than the melting temperature of the polyurethane foam, the outer diameter is large at the beginning, the expandable permeation filtration layer is prepared after 15 hours and 5 times of rolling, and the specific performance of the expandable permeation filtration layer is listed in table 2.
Example 5
Preparation of polyurethane foam:
1: weighing phenyl methane polyisocyanate (PAPI), polyoxypropylene diol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene-ethylene oxide copolyether for later use according to a proportion, wherein the mass fraction of the polyphenyl methane polyisocyanate is 50%; the mass fraction of the polyoxypropylene glycol was 30%; the mass fraction of the polyoxypropylene triol is 15 percent; the mass fraction of 1, 4-Butanediol (BDO) is 3 percent; the mass fraction of the polyoxypropylene-ethylene oxide copolyether is 2 percent.
2: adding phenyl methane polyisocyanate (PAPI), polyoxypropylene glycol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene ethylene oxide copolyether into a reaction kettle in the step 1, mixing and reacting the materials, wherein the mixing and reacting time is 0.5-0.6 h, the mixing and reacting temperature is controlled to be 45-85 ℃, the rotating speed of a stirrer is 1000 plus materials and 1200 rpm, obtaining polyurethane foam after the reaction is finished, and specifically, the performances of the polyurethane foam are listed in Table 1.
Preparation of the expandable permeation filtration layer:
the synthesized polyurethane foam and the polyurethane hot melt adhesive (the melting temperature is 65 +/-5 ℃) are mixed and uniformly stirred in a container according to the preset mass ratio (the mass content of the polyurethane foam is 50% based on the total weight of the polyurethane foam and the hot melt adhesive), then the mixture is added into rolling equipment (multi-petal type shaping equipment) for pressing, the temperature is controlled to be between 90 and 150 ℃, the temperature is required to be lower than the melting temperature of the polyurethane foam, the outer diameter is large at the beginning, the expandable permeation filtration layer is prepared after rolling for 20 hours and 7 times, and the specific performance of the expandable permeation filtration layer is listed in table 2.
Example 6
Preparation of polyurethane foam:
1: weighing phenyl methane polyisocyanate (PAPI), polyoxypropylene diol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene-ethylene oxide copolyether for later use according to a proportion, wherein the mass fraction of the polyphenyl methane polyisocyanate is 50%; the mass fraction of the polyoxypropylene glycol was 30%; the mass fraction of the polyoxypropylene triol is 10 percent; the mass fraction of 1, 4-Butanediol (BDO) is 5 percent; the mass fraction of the polyoxypropylene-ethylene oxide copolyether is 5 percent.
2: adding phenyl methane polyisocyanate (PAPI), polyoxypropylene glycol, polyoxypropylene triol, chain extender 1, 4-Butanediol (BDO) and cell opener polyoxypropylene ethylene oxide copolyether into a reaction kettle in the step 1, mixing and reacting the materials, wherein the mixing and reacting time is 0.5-0.6 h, the mixing and reacting temperature is controlled to be 45-85 ℃, the rotating speed of a stirrer is 1000 plus materials and 1200 rpm, obtaining polyurethane foam after the reaction is finished, and specifically, the performances of the polyurethane foam are listed in Table 1.
Preparation of the expandable permeation filtration layer:
the synthesized polyurethane foam and the polyurethane hot melt adhesive (the melting temperature is 65 +/-5 ℃) are mixed and uniformly stirred in a container according to the preset mass ratio (the mass content of the polyurethane foam is 97 percent based on the total weight of the polyurethane foam and the hot melt adhesive), then the mixture is added into rolling equipment (multi-petal type shaping equipment) for pressing, the temperature is controlled to be between 90 and 150 ℃, the temperature is required to be lower than the melting temperature of the polyurethane foam, the outer diameter is large at the beginning, the expandable permeation filtration layer is prepared after 18 hours and 6 times of rolling, and the specific performance of the expandable permeation filtration layer is listed in table 2.
TABLE 1
Figure BDA0002231704410000101
Figure BDA0002231704410000111
TABLE 2
Figure BDA0002231704410000112
Example 7
The thickness of the primary element varies from one wellbore to another. In an actual oil-water well, the following dimensions can be adopted:
TABLE 3 thickness parameters for different dimensions
Figure BDA0002231704410000113
Figure BDA0002231704410000121
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.

Claims (10)

1. The sand control screen pipe comprises a base pipe and an expandable permeation filtering layer wrapping the base pipe, wherein the expandable permeation filtering layer is formed by compounding polyurethane foam and hot melt adhesive.
2. The sand control screen according to claim 1, wherein the polyurethane foam is present in an amount of 3 to 97% by mass, preferably 15 to 85% by mass, based on the total weight of the polyurethane foam and the hot melt adhesive.
3. The sand control screen of claim 1 or 2, wherein the polyurethane foam has a density of 0.1 to 0.26g/cm3The aperture ratio is 85-99%, the 50% compression strength is 0.001-2MPa, the average aperture is 0.01-10nm, and the melting temperature is 100-300 ℃.
4. The sand control screen according to any one of claims 1 to 3, wherein the hot melt adhesive is selected from one or more of SIS hot melt adhesive, polyurethane hot melt adhesive, EVA hot melt adhesive, waterborne polyurethane hot melt adhesive, PA hot melt adhesive and reactive polyurethane hot melt adhesive;
and/or the melting temperature of the hot melt adhesive is lower than the melting temperature of the polyurethane foam.
5. The sand control screen according to any one of claims 1 to 4, wherein the expandable permeable filter layer is formed by pressing polyurethane foam and hot melt adhesive in a rolling apparatus, preferably at a temperature of 90 to 150 ℃ for a period of 12 to 24 hours.
6. The sand control screen according to any one of claims 1 to 5, wherein the crushing device is selected from one or more of devices capable of sizing hollow cylinders, preferably a multi-lobed sizing device.
7. The sand control screen of any one of claims 1-6, wherein the base pipe is selected from one or more of a slotted base pipe and a perforated base pipe; and/or the expandable permeation filtration layer coats the base pipe in multiple segments, preferably 3-6 segments.
8. The sand control screen of any one of claims 1 to 7, further comprising a tensile layer covering the expandable permeable filtration layer, the tensile layer being selected from one or more of a fluid soluble polymer membrane and a thermally fluid degradable plastic layer, preferably the tensile layer having a melting temperature 10-30 ℃ higher than the expansion temperature of the expandable permeable filtration layer.
9. The sand control screen of any one of claims 1-8, further comprising a screen disposed between the base pipe and the expandable permeable filtration layer.
10. Use of a sand control screen according to any one of claims 1-9 in a well completion.
CN201910969887.8A 2019-10-12 2019-10-12 Sand control screen pipe and application thereof Pending CN112647901A (en)

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Application publication date: 20210413