CN114075954A - Prevent blockking up high infiltration sand pipe - Google Patents
Prevent blockking up high infiltration sand pipe Download PDFInfo
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- CN114075954A CN114075954A CN202010846748.9A CN202010846748A CN114075954A CN 114075954 A CN114075954 A CN 114075954A CN 202010846748 A CN202010846748 A CN 202010846748A CN 114075954 A CN114075954 A CN 114075954A
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- fixing ring
- sand filter
- shockproof fixing
- pipe
- filter
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- 229920005989 resin Polymers 0.000 claims abstract description 151
- 239000002184 metal Substances 0.000 claims abstract description 132
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 83
- 239000010935 stainless steel Substances 0.000 claims abstract description 81
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- 239000010440 gypsum Substances 0.000 claims description 16
- 239000004571 lime Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 230000000813 microbial effect Effects 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
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- 238000005192 partition Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- RFXWSSKJUYFOBO-UHFFFAOYSA-N tricyanatosilyl cyanate Chemical compound N#CO[Si](OC#N)(OC#N)OC#N RFXWSSKJUYFOBO-UHFFFAOYSA-N 0.000 claims description 8
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The utility model discloses an anti-blocking high-infiltration sand pipe, which comprises a central pipe and a resin sand filter sleeved outside the central pipe, wherein the pipe body of the central pipe is provided with a radial through overflowing hole, the inner diameter of the resin sand filter is larger than the outer diameter of the central pipe, and the anti-blocking high-infiltration sand pipe also comprises: the stainless steel metal net biofilter is sleeved outside the resin sand filter, and the inner diameter of the stainless steel metal net biofilter is larger than the outer diameter of the resin sand filter. The utility model effectively and fundamentally solves the problem that the mechanical sand control tool is easy to block, and prolongs the service life of the sand filter pipe. The damage rate of the sand screen pipe in the process of the well descending operation is reduced, the operation success rate is improved, the cost is saved, and the effects of increasing the yield for a long time and stabilizing the yield are achieved.
Description
Technical Field
The utility model relates to the technical field of underground sand control in oil exploitation, in particular to an anti-blocking high-infiltration sand pipe.
Background
China's loose sandstone reservoir has wide distribution range, large reserves and high yield, and occupies an important position in oil exploitation all the time. However, with the deep mining, in order to improve the oil well recovery ratio, the technologies of water injection, gas injection and the like are gradually expanded, popularized and implemented, and the enhanced mining causes the oil reservoir stratum to be intensified in cementation and loose degree and serious in heterogeneity, and finally causes the oil well to be serious in sand production.
The sand production of the oil well can not only cause the yield reduction of the oil field, but also cause the deformation of a sleeve and even discard of the oil well in serious cases, so that the sand prevention is carried out by adopting necessary measures, and the sand prevention is a necessary means for ensuring the normal exploitation of the oil well. The currently commonly used sand control technologies mainly include mechanical sand control, chemical sand control, composite sand control and the like, wherein the mechanical sand control accounts for about 90% of the whole sand control operation. The mechanical sand control is a sand control process for putting a sand control pipe column into a well to prevent formation sand from entering a shaft. Generally, two categories are provided: one is directly put into a sand control pipe column for blocking sand, such as a slotted screen pipe, a wire-wound screen pipe, a resin sand filter pipe and the like; the other is to fill the sand-proof pipe column with materials, and the commonly used filling materials mainly comprise gravel, shells, plastic particles, glass beads and the like. The sand control method can effectively block the formation sand out of the shaft in the early stage of sand control, has good sand control effect, but the sand control tool is easy to block along with long-time use, thereby reducing the oil well extraction rate.
Aiming at the problem that the sand prevention tool is easy to block, a great deal of scientific research is carried out in many enterprises, scientific research institutions and the like in the early stage, the anti-blocking performance of the sand prevention tool is improved through improved design, the service cycle of the sand prevention tool is prolonged, and the sand prevention tool does not achieve ideal effect. For example, chinese patent ZL201821388160.8 discloses a self-cleaning resin sand screen, which mainly comprises a base pipe and a cemented sand screen layer, wherein the cemented sand screen layer is sleeved outside the base pipe and is divided into a large-particle size cemented sand screen layer and a small-particle size cemented sand screen layer, and the large-particle size cemented sand screen layer is located inside the small-particle size cemented sand screen layer. This design is through optimizing the combined mode of sand filter cemented sand particle size, can effectively discharge the inside fine silt sand that gets into the sand filter to guaranteed the permeability of resin sand screen, prolonged the sand control and stablize the production period. However, once the external small-particle size cemented sand layer is blocked, the sand pipe cannot perform a self-cleaning function, so that the design still does not fundamentally solve the problem of blocking of the sand screen pipe. Therefore, how to design a set of sand screen pipe with the characteristics of blockage prevention and high permeability is a technical problem which needs to be solved urgently in the related field.
Biofiltration techniques are known per se, and the metabolism of organisms is used to purify water or air of harmful substances, which of course are nutrients to humans and to such organisms. For example, some big trees have a filtering effect on acid gases in the air. Or the oil filter can phagocytose a plurality of organic matters such as aromatic hydrocarbon and the like to specially clean the bacteria leaking oil in the sea.
Publication (bulletin) No.: CN105507854A, publication (public notice) day: 2016-04-20 provides a spiral pump sand screen that can drive fluid functions within a wellbore. The spiral sand filter comprises a central tube, a thin-walled tube and a sand filter screen material, wherein the thin-walled tube is arranged outside the central tube in a sealing manner, the sand filter screen material is clamped between the central tube and the thin-walled tube, a plurality of through holes are radially formed in the tube walls of the central tube and the thin-walled tube, at least two groups of bearing frames and bearing assemblies are arranged inwards along the central tube, a spiral pump shaft penetrates through the bearings, the bearings and the spiral pump shaft form rotary fit, and spiral blades are fixedly wound on the spiral pump shaft between the bearings. By adopting the spiral pump sand filtering pipe, the sand filtering net material prevents formation sand from entering a shaft, and the spiral pump shaft drives the spiral blade to push liquid in the pipe from one end to the other end when rotating, so that the spiral pump sand filtering pipe has the functions of overcoming friction along the way and balancing pressure difference generated at two ends of the sand filtering pipe, greatly improves the inflow section balance of a horizontal section, effectively controls bottom water to rapidly flow in, exerts the advantages of a horizontal well and obtains the maximum benefit.
Publication (bulletin) No.: CN2688891Y, publication (public notice) day: 2005-03-30 discloses an erosion-resistant high-permeability sand screen, which comprises a porous central tube, a metal screen, a porous outer protective tube, and a metal protective layer disposed between the metal screen and the porous outer protective tube, wherein the metal protective layer is a stainless steel thin-walled tubular body, and fluid circulation holes are disposed on the metal protective layer. The utility model reduces the chance of erosion and the blockage of the metal filter screen, is easy to remove blockage by backwashing, and prolongs the production period of the oil well. Can be widely applied to oil exploitation.
Publication (bulletin) No.: CN1765557A, publication (public notice) day: 2006-05-03 discloses a manufacturing method and welding equipment of a sand control pipe, wherein a metal filter screen is wrapped outside a porous support sleeve and fixed on the outer wall of the support sleeve in a welding mode, and the metal filter screen completely covers all through holes of the support sleeve to form a filter sleeve; fixing a filter sleeve on the outer wall of the base tube, wherein the filter sleeve covers all through holes of the base tube; and sleeving an outer protective sleeve outside the filter sleeve and fixing the outer protective sleeve with the outer wall of the base tube, wherein the outer protective sleeve completely covers the outer surface of the filter part of the filter sleeve. The metal mesh grid is directly fixed outside the support sleeve by adopting a double-sided single spot welding or seam welding process, so that the hole leakage phenomenon of the welding part of the metal mesh grid is eliminated, the sand control pipe with multiple layers of metal mesh grids can be formed, the sand control capacity of the sand control pipe is improved, and the service life of the sand control pipe is prolonged. The utility model also discloses a welding device of the sand control pipe, which realizes the penetration welding of the slender filtering sleeve, improves the welding quality of the metal woven mesh and reduces the manufacturing cost of the sand control pipe.
The technical scheme of the disclosed technology, the technical problems to be solved and the beneficial effects are all different from the technical scheme of the utility model, or the technical field or the application occasion is different, and no technical inspiration exists in the technical scheme disclosed above.
Disclosure of Invention
The utility model aims to provide the anti-blocking high-infiltration sand pipe aiming at the defects in the prior art, effectively and fundamentally solves the problem that a mechanical sand control tool is easy to block, and prolongs the service life of the sand pipe. The damage rate of the sand screen pipe in the process of the well descending operation is reduced, the operation success rate is improved, the cost is saved, and the effects of increasing the yield for a long time and stabilizing the yield are achieved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a prevent blockking up high filtration sand pipe, includes center tube and the outside resin sand filter of suit at the center tube, be equipped with the discharge orifice that radially link up on the center tube body, the internal diameter of resin sand filter is greater than the center tube external diameter, still includes:
the stainless steel metal net biofilter is sleeved outside the resin sand filter, and the inner diameter of the stainless steel metal net biofilter is larger than the outer diameter of the resin sand filter.
Further, the stainless steel wire mesh biofilter comprises:
the device comprises concentric double-layer metal screens, a plurality of filter screens and a plurality of filter screens, wherein an annular overflowing cavity is formed between the concentric double-layer metal screens, and a transverse partition plate is welded in the overflowing cavity to divide the overflowing cavity into a plurality of small chambers;
the biological ceramsite is filled in the small cavity of the overflowing cavity, each biological ceramsite is loaded with a microbial agent, and the particle size of the biological ceramsite is larger than that of the quartz sand of the resin sand filter and the aperture of the concentric double-layer metal screen.
Furthermore, horizontal lacing wires and vertical lacing wires are welded on the inner sides of the concentric double-layer metal screens to serve as support keels.
Furthermore, the resin sand filter is formed by cementing quartz sand and organic silicon cyanate resin, and the length of the sand filter is 1-1.5 m.
Furthermore, both ends of the central tube are provided with connecting screw threads, the upper end of the central tube is provided with a male thread connected with the centralizer, the lower end of the central tube is provided with a female thread, the surface of the central tube is provided with a hoisting clamping groove, the number of overflowing holes on the central tube body is 80-100/m, and the aperture is 6-10 mm.
Further, the centralizer includes centralizer body, metal nipple joint lower extreme and center tube upper end screw thread formula are connected, and metal nipple joint outer wall sets up the polyurethane and glues the layer, centralizer body suit is outside at metal nipple joint to fix in polyurethane and glue layer department.
Further, the centralizer is prepared by mixing fly ash, gypsum and lime, and the components are as follows, and the addition amounts of the components are as follows: 80-90 parts of fly ash, 1-3 parts of gypsum and 5-15 parts of lime. The processing technology comprises the following steps of weighing the components in proportion, adding water, uniformly mixing to a semi-solid state, and curing for 2 hours at 150-180 ℃.
Furthermore, an upper inner positioning rubber ring and a lower inner positioning rubber ring are mounted on the outer wall of the central pipe, the upper inner positioning rubber ring seals and blocks an upper port of the resin sand filter, and the lower inner positioning rubber ring seals and blocks a lower port of the resin sand filter; the outer wall of the resin sand filter is provided with an upper outer positioning rubber ring and a lower outer positioning rubber ring, the upper outer positioning rubber ring seals and blocks an upper port of the stainless steel metal mesh biological filter, and the lower outer positioning rubber ring seals and blocks a lower port of the stainless steel metal mesh biological filter.
Furthermore, the outer wall of the central tube is further sleeved with an upper shockproof fixing ring and a lower shockproof fixing ring, the upper end of the resin sand filter is embedded into an embedded groove of the lower end face of the upper shockproof fixing ring, the lower end of the resin sand filter is embedded into an embedded groove of the upper end face of the lower shockproof fixing ring, the position of the resin sand filter, which is in contact with the upper shockproof fixing ring and the lower shockproof fixing ring, is coated with polyurethane sealant, the inner wall of the upper end of the stainless steel metal mesh biofilter is fixed on the outer wall of the lower end of the upper shockproof fixing ring, the inner wall of the lower end of the stainless steel metal mesh biofilter is fixed on the outer wall of the upper shockproof fixing ring, and the position of the stainless steel metal mesh biofilter, which is in contact with the upper shockproof fixing ring and the lower shockproof fixing ring, is coated with polyurethane sealant.
Furthermore, the upper end of the upper shockproof fixing ring is of a corrugated expansion pipe structure, the lower end of the upper shockproof fixing ring is of a double-layer lantern ring, the corrugated expansion pipe structure end of the upper shockproof fixing ring is connected with the central pipe in a welding mode, and the double-layer lantern ring end of the upper shockproof fixing ring is fixedly connected with the resin sand filter in an embedded mode; the lower end of the lower shockproof fixing ring is of a corrugated expansion pipe structure, the upper end of the lower shockproof fixing ring is of a double-layer lantern ring, the corrugated expansion pipe structure end of the lower shockproof fixing ring is connected with the central pipe in a welding mode, and the double-layer lantern ring end of the lower shockproof fixing ring is fixedly connected with the stainless steel metal mesh biofilter in an embedded mode.
Compared with the prior art, the utility model has the following beneficial effects:
the stainless steel metal mesh biological filter is arranged on the sand filtering pipe, and the problem that a mechanical sand prevention tool is easy to block is effectively and fundamentally solved by using the action of microorganisms, so that the service life of the sand filtering pipe is prolonged.
By optimizing the local structure, the sand screen pipe damage rate in the process of the downhole operation is reduced, the operation success rate is improved, the cost is saved, the effects of increasing the yield for a long time and stabilizing the yield are achieved, and the sand screen pipe sand control method has important popularization significance in future sand control operation.
Drawings
FIG. 1 is a schematic structural view of an anti-clogging high infiltration sand pipe according to the present invention;
FIG. 2 is an enlarged partial view of the upper end of FIG. 1;
FIG. 3 is an enlarged view of a portion of the lower end of FIG. 1;
FIG. 4 is a schematic view of a centralizer;
FIG. 5 is a schematic view of the anti-rattle retainer ring.
In the figure: 101. a centralizer, 102, an upper shockproof fixed ring, 103, a stainless steel metal mesh biological filter, 104, a resin sand filter, 105, an upper inner positioning rubber ring, 106, an upper outer positioning rubber ring, 107, a lower inner positioning rubber ring, 108, a lower outer positioning rubber ring, 109, a lower shockproof fixed ring, 110 and a central tube;
201. the device comprises a metal short section 202, a polyurethane adhesive layer 203, a centralizer 204 and a screw thread;
301. bellows structure, 302, double-layer collar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1 to 5, the present invention provides a technical solution:
an anti-blocking high-infiltration sand pipe comprises a centralizer 101, a central pipe 110, a resin sand filter 104, a stainless steel metal mesh biological filter 103, a shockproof fixing ring, an inner positioning rubber ring and an outer positioning rubber ring. The shockproof fixing ring is divided into an upper shockproof fixing ring 102 and a lower shockproof fixing ring 109, the inner positioning rubber ring is divided into an upper inner positioning rubber ring 105 and a lower inner positioning rubber ring 107, and the outer positioning rubber ring is divided into an upper outer positioning rubber ring 106 and a lower outer positioning rubber ring 108. The centralizer is positioned at one end of the central tube and is connected with the central tube through a screw thread, the resin sand filter is sleeved on the central tube and forms an annular space with the central tube, the stainless steel metal mesh biofilter is sleeved outside the resin sand filter, the length of the stainless steel metal mesh biofilter is equal to that of the resin sand filter, the annular space is formed between the stainless steel metal mesh biofilter and the resin sand filter, the shockproof fixing ring is sleeved on the central tube and positioned at two ends of the resin sand filter and the stainless steel metal mesh biofilter and is welded with the central tube, wherein the upper shockproof fixing ring is positioned at one end of the central tube connected with the centralizer and positioned behind the centralizer, the lower shockproof fixing ring is positioned at the other end of the central tube, the resin sand filter and the stainless steel metal mesh biofilter are connected with the shockproof fixing ring in an embedded manner, and polyurethane sealant is coated at the position outside the resin sand filter and in contact with the shockproof fixing ring, the inner positioning rubber ring is positioned in the annular space between the resin sand filter and the central tube, wherein the inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring, the outer positioning rubber ring is positioned in the annular space between the resin sand filter and the stainless steel metal mesh biological filter, wherein the upper outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring.
According to the utility model, preferably, both ends of the central tube are provided with connecting screw threads, one end connected with the centralizer 203 is a male thread, the other end is a female thread, the surface of the central tube is provided with a hoisting clamping groove, and the tube body of the central tube is provided with overflowing holes, the number of the overflowing holes is 80/m, and the aperture is 10 mm. The centralizer 203 of fig. 4 is the same component as the centralizer 101 of fig. 1.
According to the utility model, the centralizer is preferably prepared from fly ash, gypsum and lime, and the components are as follows, wherein the addition amounts of the components are as follows: 88 parts of fly ash, 2 parts of gypsum and 10 parts of lime, weighing the components in proportion, adding water, uniformly mixing to a semi-solid state, coating the mixture on a metal short section 201 with the same specification as the central pipe, and curing for 2 hours at 150 ℃. The metal nipple surface layer is brushed with a polyurethane adhesive layer 202, one end connected with the central pipe is a female buckle, and the other end is a male buckle.
The advantage of this place design lies in, the polyurethane glue film can avoid centralizer and metal nipple joint direct contact, because stratum temperature is generally higher, and the centralizer is different with metal nipple joint shrink performance, receives stratum high temperature to influence down, can take place the inflation, and the polyurethane glue film can play the cushioning effect this moment, is unlikely to cause the centralizer fracture.
According to the utility model, the resin sand filter is preferably formed by cementing quartz sand and organic silicon cyanate ester resin, and the length of the sand filter is 1 m. Resin sandscreens are known per se in the art and their component proportion and preparation are not described in detail.
According to the preferable selection of the utility model, the stainless steel metal mesh biofilter is composed of double-layer screens, a flow passing cavity is formed between the double-layer screens, a transverse partition plate is welded in the flow passing cavity, the flow passing cavity is divided into a plurality of small chambers, biological ceramsite is filled in each small chamber, each biological ceramsite is loaded with a microbial agent, the total filling volume of the biological ceramsite accounts for 1/2 of the total volume of the flow passing cavity, the particle size of the biological ceramsite is larger than that of quartz sand of the resin sand filter and the pore size of the double-layer screens, and transverse tie bars and vertical tie bars are welded on the inner sides of the screens, so that the stainless steel metal mesh biofilter mainly plays a supporting role.
The design has the advantages that each biological ceramsite is filled with the microbial agent, microorganisms can be excited under the stratum condition, the ceramsite is used as a carrier to continuously proliferate, various metabolites generated by the growth and metabolism of the microorganisms, such as surfactant, acid and gas, can change the interfacial tension, viscosity and the like of crude oil, can effectively clean substances which are easy to cause sand filter pipe blockage, such as crude oil, stratum sand and the like adhered to the surface of the resin sand filter on the inner layer, and has the function of preventing blockage. Bioceramisites per se are well known in the art and will be clear to the skilled person.
According to the utility model, one end of the shockproof fixing ring is a corrugated telescopic pipe structure 301, and the other end of the shockproof fixing ring is a double-layer lantern ring 302. The corrugated telescopic pipe end is welded with the central pipe, and the double-layer collar end is fixedly connected with the resin sand filter and the stainless steel metal mesh biological filter in an embedded manner.
The advantage of here design lies in, bellows structure can play buffering cushioning effect in the sand screen operation in-process of going into the well, is favorable to protecting the sand screen.
According to the utility model, the inner positioning rubber ring and the outer positioning rubber ring are both silicon rubber O-shaped rings.
Example 2:
referring to fig. 1 to 5, the present invention provides a technical solution:
an anti-blocking high-infiltration sand pipe comprises a centralizer, a central pipe, a resin sand filter, a stainless steel metal mesh biological filter, a shockproof fixing ring, an inner positioning rubber ring and an outer positioning rubber ring. The shockproof fixing ring comprises an upper shockproof fixing ring and a lower shockproof fixing ring, the inner positioning rubber ring comprises an upper inner positioning rubber ring and a lower inner positioning rubber ring, and the outer positioning rubber ring comprises an upper outer positioning rubber ring and a lower outer positioning rubber ring. The centralizer is positioned at one end of the central tube and is connected with the central tube through a screw thread, the resin sand filter is sleeved on the central tube and forms an annular space with the central tube, the stainless steel metal mesh biofilter is sleeved outside the resin sand filter, the length of the stainless steel metal mesh biofilter is equal to that of the resin sand filter, the annular space is formed between the stainless steel metal mesh biofilter and the resin sand filter, the shockproof fixing ring is sleeved on the central tube and positioned at two ends of the resin sand filter and the stainless steel metal mesh biofilter and is welded with the central tube, wherein the upper shockproof fixing ring is positioned at one end of the central tube connected with the centralizer and positioned behind the centralizer, the lower shockproof fixing ring is positioned at the other end of the central tube, the resin sand filter and the stainless steel metal mesh biofilter are connected with the shockproof fixing ring in an embedded manner, and polyurethane sealant is coated at the position outside the resin sand filter and in contact with the shockproof fixing ring, the inner positioning rubber ring is positioned in the annular space between the resin sand filter and the central tube, wherein the inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring, the outer positioning rubber ring is positioned in the annular space between the resin sand filter and the stainless steel metal mesh biological filter, wherein the upper outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring.
According to the utility model, preferably, both ends of the central tube are provided with connecting screw threads, one end connected with the centralizer is a male thread, the other end is a female thread, the surface of the central tube is provided with a hoisting clamping groove, and the tube body of the central tube is provided with overflowing holes, the number of the overflowing holes is 90/m, and the aperture is 9 mm.
According to the utility model, the centralizer is preferably prepared from fly ash, gypsum and lime, and the components are as follows, wherein the addition amounts of the components are as follows: 89 parts of fly ash, 1 part of gypsum and 10 parts of lime, weighing the components in proportion, adding water, uniformly mixing to a semi-solid state, coating the mixture on a metal short section 201 with the same specification as the central pipe, and curing for 2 hours at 160 ℃. The metal nipple surface layer is brushed with a polyurethane adhesive layer 202, one end connected with the central pipe is a female buckle, and the other end is a male buckle.
The advantage of this place design lies in, the polyurethane glue film can avoid centralizer and metal nipple joint direct contact, because stratum temperature is generally higher, and the centralizer is different with metal nipple joint shrink performance, receives stratum high temperature to influence down, can take place the inflation, and the polyurethane glue film can play the cushioning effect this moment, is unlikely to cause the centralizer fracture.
According to the utility model, the resin sand filter is preferably formed by cementing quartz sand and organic silicon cyanate ester resin, and the length of the sand filter is 1.2 m.
According to the preferable selection of the utility model, the stainless steel metal mesh biofilter is composed of double-layer screens, a flow passing cavity is formed between the double-layer screens, a transverse partition plate is welded in the flow passing cavity, the flow passing cavity is divided into a plurality of small chambers, biological ceramsite is filled in each small chamber, each biological ceramsite is loaded with a microbial agent, the total filling volume of the biological ceramsite accounts for 2/3 of the total volume of the flow passing cavity, the particle size of the biological ceramsite is larger than that of quartz sand of the resin sand filter and the pore size of the double-layer screens, and transverse tie bars and vertical tie bars are welded on the inner sides of the screens, so that the stainless steel metal mesh biofilter mainly plays a supporting role.
The design has the advantages that each biological ceramsite is filled with the microbial agent, microorganisms can be excited under the stratum condition, the ceramsite is used as a carrier to continuously proliferate, various metabolites generated by the growth and metabolism of the microorganisms, such as surfactant, acid and gas, can change the interfacial tension, viscosity and the like of crude oil, can effectively clean substances which are easy to cause sand filter pipe blockage, such as crude oil, stratum sand and the like adhered to the surface of the resin sand filter on the inner layer, and has the function of preventing blockage.
According to the utility model, one end of the shockproof fixing ring is of a corrugated expansion pipe structure, and the other end of the shockproof fixing ring is of a double-layer lantern ring. The corrugated telescopic pipe end is welded with the central pipe, and the double-layer collar end is fixedly connected with the resin sand filter and the stainless steel metal mesh biological filter in an embedded manner.
The advantage of here design lies in, bellows structure can play buffering cushioning effect in the sand screen operation in-process of going into the well, is favorable to protecting the sand screen.
According to the utility model, the inner positioning rubber ring and the outer positioning rubber ring are both silicon rubber O-shaped rings.
Example 3:
referring to fig. 1 to 5, the present invention provides a technical solution:
an anti-blocking high-infiltration sand pipe comprises a centralizer, a central pipe, a resin sand filter, a stainless steel metal mesh biological filter, a shockproof fixing ring, an inner positioning rubber ring and an outer positioning rubber ring. The shockproof fixing ring comprises an upper shockproof fixing ring and a lower shockproof fixing ring, the inner positioning rubber ring comprises an upper inner positioning rubber ring and a lower inner positioning rubber ring, and the outer positioning rubber ring comprises an upper outer positioning rubber ring and a lower outer positioning rubber ring. The centralizer is positioned at one end of the central tube and is connected with the central tube through a screw thread, the resin sand filter is sleeved on the central tube and forms an annular space with the central tube, the stainless steel metal mesh biofilter is sleeved outside the resin sand filter, the length of the stainless steel metal mesh biofilter is equal to that of the resin sand filter, the annular space is formed between the stainless steel metal mesh biofilter and the resin sand filter, the shockproof fixing ring is sleeved on the central tube and positioned at two ends of the resin sand filter and the stainless steel metal mesh biofilter and is welded with the central tube, wherein the upper shockproof fixing ring is positioned at one end of the central tube connected with the centralizer and positioned behind the centralizer, the lower shockproof fixing ring is positioned at the other end of the central tube, the resin sand filter and the stainless steel metal mesh biofilter are connected with the shockproof fixing ring in an embedded manner, and polyurethane sealant is coated at the position outside the resin sand filter and in contact with the shockproof fixing ring, the inner positioning rubber ring is positioned in the annular space between the resin sand filter and the central tube, wherein the inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring, the outer positioning rubber ring is positioned in the annular space between the resin sand filter and the stainless steel metal mesh biological filter, wherein the upper outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring.
According to the utility model, preferably, both ends of the central tube are provided with connecting screw threads, one end connected with the centralizer is a male thread, the other end is a female thread, the surface of the central tube is provided with a hoisting clamping groove, and the tube body of the central tube is provided with overflowing holes, the number of the overflowing holes is 100/m, and the aperture is 6 mm.
According to the utility model, the centralizer is preferably prepared from fly ash, gypsum and lime, and the components are as follows, wherein the addition amounts of the components are as follows: 90 parts of fly ash, 2 parts of gypsum and 8 parts of lime, weighing the components according to a proportion, adding water, uniformly mixing to a semi-solid state, coating the mixture on a metal short section 201 with the same specification as the central pipe, and curing for 2 hours at 170 ℃. The metal nipple surface layer is brushed with a polyurethane adhesive layer 202, one end connected with the central pipe is a female buckle, and the other end is a male buckle.
The advantage of this place design lies in, the polyurethane glue film can avoid centralizer and metal nipple joint direct contact, because stratum temperature is generally higher, and the centralizer is different with metal nipple joint shrink performance, receives stratum high temperature to influence down, can take place the inflation, and the polyurethane glue film can play the cushioning effect this moment, is unlikely to cause the centralizer fracture.
According to the utility model, the resin sand filter is preferably formed by cementing quartz sand and organic silicon cyanate ester resin, and the length of the sand filter is 1.5 m.
According to the preferable selection of the utility model, the stainless steel metal mesh biofilter is composed of double-layer screens, a flow passing cavity is formed between the double-layer screens, a transverse partition plate is welded in the flow passing cavity, the flow passing cavity is divided into a plurality of small chambers, biological ceramsite is filled in each small chamber, each biological ceramsite is loaded with a microbial agent, the total filling volume of the biological ceramsite accounts for 4/5 of the total volume of the flow passing cavity, the particle size of the biological ceramsite is larger than that of quartz sand of the resin sand filter and the pore size of the double-layer screens, and transverse tie bars and vertical tie bars are welded on the inner sides of the screens, so that the stainless steel metal mesh biofilter mainly plays a supporting role.
The design has the advantages that each biological ceramsite is filled with the microbial agent, microorganisms can be excited under the stratum condition, the ceramsite is used as a carrier to continuously proliferate, various metabolites generated by the growth and metabolism of the microorganisms, such as surfactant, acid and gas, can change the interfacial tension, viscosity and the like of crude oil, can effectively clean substances which are easy to cause sand filter pipe blockage, such as crude oil, stratum sand and the like adhered to the surface of the resin sand filter on the inner layer, and has the function of preventing blockage.
According to the utility model, one end of the shockproof fixing ring is of a corrugated expansion pipe structure, and the other end of the shockproof fixing ring is of a double-layer lantern ring. The corrugated telescopic pipe end is welded with the central pipe, and the double-layer collar end is fixedly connected with the resin sand filter and the stainless steel metal mesh biological filter in an embedded manner.
The advantage of here design lies in, bellows structure can play buffering cushioning effect in the sand screen operation in-process of going into the well, is favorable to protecting the sand screen.
According to the utility model, the inner positioning rubber ring and the outer positioning rubber ring are both silicon rubber O-shaped rings.
Example 4:
referring to fig. 1 to 5, the present invention provides a technical solution:
an anti-blocking high-infiltration sand pipe comprises a centralizer, a central pipe, a resin sand filter, a stainless steel metal mesh biological filter, a shockproof fixing ring, an inner positioning rubber ring and an outer positioning rubber ring. The shockproof fixing ring comprises an upper shockproof fixing ring and a lower shockproof fixing ring, the inner positioning rubber ring comprises an upper inner positioning rubber ring and a lower inner positioning rubber ring, and the outer positioning rubber ring comprises an upper outer positioning rubber ring and a lower outer positioning rubber ring. The centralizer is positioned at one end of the central tube and is connected with the central tube through a screw thread, the resin sand filter is sleeved on the central tube and forms an annular space with the central tube, the stainless steel metal mesh biofilter is sleeved outside the resin sand filter, the length of the stainless steel metal mesh biofilter is equal to that of the resin sand filter, the annular space is formed between the stainless steel metal mesh biofilter and the resin sand filter, the shockproof fixing ring is sleeved on the central tube and positioned at two ends of the resin sand filter and the stainless steel metal mesh biofilter and is welded with the central tube, wherein the upper shockproof fixing ring is positioned at one end of the central tube connected with the centralizer and positioned behind the centralizer, the lower shockproof fixing ring is positioned at the other end of the central tube, the resin sand filter and the stainless steel metal mesh biofilter are connected with the shockproof fixing ring in an embedded manner, and polyurethane sealant is coated at the position outside the resin sand filter and in contact with the shockproof fixing ring, the inner positioning rubber ring is positioned in the annular space between the resin sand filter and the central tube, wherein the inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring, the outer positioning rubber ring is positioned in the annular space between the resin sand filter and the stainless steel metal mesh biological filter, wherein the upper outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring.
According to the utility model, preferably, both ends of the central tube are provided with connecting screw threads, one end connected with the centralizer is a male thread, the other end is a female thread, the surface of the central tube is provided with a hoisting clamping groove, the tube body of the central tube is provided with overflowing holes, the number of the overflowing holes is 88/m, and the aperture is 7 mm.
According to the utility model, the centralizer is preferably prepared from fly ash, gypsum and lime, and the components are as follows, wherein the addition amounts of the components are as follows: 85 parts of fly ash, 3 parts of gypsum and 12 parts of lime, weighing the components in proportion, adding water, uniformly mixing to a semi-solid state, coating the mixture on a metal short section 201 with the same specification as the central pipe, and curing for 2 hours at 165 ℃. The metal nipple surface layer is brushed with a polyurethane adhesive layer 202, one end connected with the central pipe is a female buckle, and the other end is a male buckle.
The advantage of this place design lies in, the polyurethane glue film can avoid centralizer and metal nipple joint direct contact, because stratum temperature is generally higher, and the centralizer is different with metal nipple joint shrink performance, receives stratum high temperature to influence down, can take place the inflation, and the polyurethane glue film can play the cushioning effect this moment, is unlikely to cause the centralizer fracture.
According to the utility model, the resin sand filter is preferably formed by cementing quartz sand and organic silicon cyanate ester resin, and the length of the sand filter is 1.1 m.
According to the preferable selection of the utility model, the stainless steel metal mesh biofilter is composed of double-layer screens, a flow passing cavity is formed between the double-layer screens, a transverse partition plate is welded in the flow passing cavity, the flow passing cavity is divided into a plurality of small chambers, biological ceramsite is filled in each small chamber, each biological ceramsite is loaded with a microbial agent, the total filling volume of the biological ceramsite accounts for 3/4 of the total volume of the flow passing cavity, the particle size of the biological ceramsite is larger than that of quartz sand of the resin sand filter and the pore size of the double-layer screens, and transverse tie bars and vertical tie bars are welded on the inner sides of the screens, so that the stainless steel metal mesh biofilter mainly plays a supporting role.
The design has the advantages that each biological ceramsite is filled with the microbial agent, microorganisms can be excited under the stratum condition, the ceramsite is used as a carrier to continuously proliferate, various metabolites generated by the growth and metabolism of the microorganisms, such as surfactant, acid and gas, can change the interfacial tension, viscosity and the like of crude oil, can effectively clean substances which are easy to cause sand filter pipe blockage, such as crude oil, stratum sand and the like adhered to the surface of the resin sand filter on the inner layer, and has the function of preventing blockage.
According to the utility model, one end of the shockproof fixing ring is of a corrugated expansion pipe structure, and the other end of the shockproof fixing ring is of a double-layer lantern ring. The corrugated telescopic pipe end is welded with the central pipe, and the double-layer collar end is fixedly connected with the resin sand filter and the stainless steel metal mesh biological filter in an embedded manner.
The advantage of here design lies in, bellows structure can play buffering cushioning effect in the sand screen operation in-process of going into the well, is favorable to protecting the sand screen.
According to the utility model, the inner positioning rubber ring and the outer positioning rubber ring are both silicon rubber O-shaped rings.
Example 5:
referring to fig. 1 to 5, the present invention provides a technical solution:
an anti-blocking high-infiltration sand pipe comprises a centralizer, a central pipe, a resin sand filter, a stainless steel metal mesh biological filter, a shockproof fixing ring, an inner positioning rubber ring and an outer positioning rubber ring. The shockproof fixing ring comprises an upper shockproof fixing ring and a lower shockproof fixing ring, the inner positioning rubber ring comprises an upper inner positioning rubber ring and a lower inner positioning rubber ring, and the outer positioning rubber ring comprises an upper outer positioning rubber ring and a lower outer positioning rubber ring. The centralizer is positioned at one end of the central tube and is connected with the central tube through a screw thread, the resin sand filter is sleeved on the central tube and forms an annular space with the central tube, the stainless steel metal mesh biofilter is sleeved outside the resin sand filter, the length of the stainless steel metal mesh biofilter is equal to that of the resin sand filter, the annular space is formed between the stainless steel metal mesh biofilter and the resin sand filter, the shockproof fixing ring is sleeved on the central tube and positioned at two ends of the resin sand filter and the stainless steel metal mesh biofilter and is welded with the central tube, wherein the upper shockproof fixing ring is positioned at one end of the central tube connected with the centralizer and positioned behind the centralizer, the lower shockproof fixing ring is positioned at the other end of the central tube, the resin sand filter and the stainless steel metal mesh biofilter are connected with the shockproof fixing ring in an embedded manner, and polyurethane sealant is coated at the position outside the resin sand filter and in contact with the shockproof fixing ring, the inner positioning rubber ring is positioned in the annular space between the resin sand filter and the central tube, wherein the inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring, the outer positioning rubber ring is positioned in the annular space between the resin sand filter and the stainless steel metal mesh biological filter, wherein the upper outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring.
According to the utility model, preferably, both ends of the central tube are provided with connecting screw threads, one end connected with the centralizer is a male thread, the other end is a female thread, the surface of the central tube is provided with a hoisting clamping groove, and the tube body of the central tube is provided with overflowing holes with the number of 99/m and the aperture of 6.5 mm.
According to the utility model, the centralizer is preferably prepared from fly ash, gypsum and lime, and the components are as follows, wherein the addition amounts of the components are as follows: 83 parts of fly ash, 2 parts of gypsum and 15 parts of lime, weighing the components in proportion, adding water, uniformly mixing to a semi-solid state, coating the mixture on a metal short section 201 with the same specification as the central pipe, and curing for 2 hours at 150 ℃. The metal nipple surface layer is brushed with a polyurethane adhesive layer 202, one end connected with the central pipe is a female buckle, and the other end is a male buckle.
The advantage of this place design lies in, the polyurethane glue film can avoid centralizer and metal nipple joint direct contact, because stratum temperature is generally higher, and the centralizer is different with metal nipple joint shrink performance, receives stratum high temperature to influence down, can take place the inflation, and the polyurethane glue film can play the cushioning effect this moment, is unlikely to cause the centralizer fracture.
According to the utility model, the resin sand filter is preferably formed by cementing quartz sand and organic silicon cyanate ester resin, and the length of the sand filter is 1.1 m.
According to the preferable selection of the utility model, the stainless steel metal mesh biofilter is composed of double-layer screens, a flow passing cavity is formed between the double-layer screens, a transverse partition plate is welded in the flow passing cavity, the flow passing cavity is divided into a plurality of small chambers, biological ceramsite is filled in each small chamber, each biological ceramsite is loaded with a microbial agent, the total filling volume of the biological ceramsite accounts for 5/6 of the total volume of the flow passing cavity, the particle size of the biological ceramsite is larger than that of quartz sand of the resin sand filter and the pore size of the double-layer screens, and transverse tie bars and vertical tie bars are welded on the inner sides of the screens, so that the stainless steel metal mesh biofilter mainly plays a supporting role.
The design has the advantages that each biological ceramsite is filled with the microbial agent, microorganisms can be excited under the stratum condition, the ceramsite is used as a carrier to continuously proliferate, various metabolites generated by the growth and metabolism of the microorganisms, such as surfactant, acid and gas, can change the interfacial tension, viscosity and the like of crude oil, can effectively clean substances which are easy to cause sand filter pipe blockage, such as crude oil, stratum sand and the like adhered to the surface of the resin sand filter on the inner layer, and has the function of preventing blockage.
According to the utility model, one end of the shockproof fixing ring is of a corrugated expansion pipe structure, and the other end of the shockproof fixing ring is of a double-layer lantern ring. The corrugated telescopic pipe end is welded with the central pipe, and the double-layer collar end is fixedly connected with the resin sand filter and the stainless steel metal mesh biological filter in an embedded manner.
The advantage of here design lies in, bellows structure can play buffering cushioning effect in the sand screen operation in-process of going into the well, is favorable to protecting the sand screen.
According to the utility model, the inner positioning rubber ring and the outer positioning rubber ring are both silicon rubber O-shaped rings.
Example 6:
referring to fig. 1 to 5, the present invention provides a technical solution:
an anti-blocking high-infiltration sand pipe comprises a centralizer, a central pipe, a resin sand filter, a stainless steel metal mesh biological filter, a shockproof fixing ring, an inner positioning rubber ring and an outer positioning rubber ring. The shockproof fixing ring comprises an upper shockproof fixing ring and a lower shockproof fixing ring, the inner positioning rubber ring comprises an upper inner positioning rubber ring and a lower inner positioning rubber ring, and the outer positioning rubber ring comprises an upper outer positioning rubber ring and a lower outer positioning rubber ring. The centralizer is positioned at one end of the central tube and is connected with the central tube through a screw thread, the resin sand filter is sleeved on the central tube and forms an annular space with the central tube, the stainless steel metal mesh biofilter is sleeved outside the resin sand filter, the length of the stainless steel metal mesh biofilter is equal to that of the resin sand filter, the annular space is formed between the stainless steel metal mesh biofilter and the resin sand filter, the shockproof fixing ring is sleeved on the central tube and positioned at two ends of the resin sand filter and the stainless steel metal mesh biofilter and is welded with the central tube, wherein the upper shockproof fixing ring is positioned at one end of the central tube connected with the centralizer and positioned behind the centralizer, the lower shockproof fixing ring is positioned at the other end of the central tube, the resin sand filter and the stainless steel metal mesh biofilter are connected with the shockproof fixing ring in an embedded manner, and polyurethane sealant is coated at the position outside the resin sand filter and in contact with the shockproof fixing ring, the inner positioning rubber ring is positioned in the annular space between the resin sand filter and the central tube, wherein the inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower inner positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring, the outer positioning rubber ring is positioned in the annular space between the resin sand filter and the stainless steel metal mesh biological filter, wherein the upper outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the upper shockproof fixing ring, and positioned behind the upper shockproof fixing ring, the lower outer positioning rubber ring is positioned at one end of the resin sand filter, which is connected with the lower shockproof fixing ring, and positioned in front of the lower shockproof fixing ring.
According to the utility model, preferably, both ends of the central tube are provided with connecting screw threads, one end connected with the centralizer is a male thread, the other end is a female thread, the surface of the central tube is provided with a hoisting clamping groove, the tube body of the central tube is provided with overflowing holes, the number of the overflowing holes is 86/m, and the aperture is 9 mm.
According to the utility model, the centralizer is preferably prepared from fly ash, gypsum and lime, and the components are as follows, wherein the addition amounts of the components are as follows: 85 parts of fly ash, 2 parts of gypsum and 13 parts of lime, weighing the components in proportion, adding water, uniformly mixing to a semi-solid state, coating the mixture on a metal short section 201 with the same specification as the central pipe, and curing for 2 hours at 175 ℃. The metal nipple surface layer is brushed with a polyurethane adhesive layer 202, one end connected with the central pipe is a female buckle, and the other end is a male buckle.
The advantage of this place design lies in, the polyurethane glue film can avoid centralizer and metal nipple joint direct contact, because stratum temperature is generally higher, and the centralizer is different with metal nipple joint shrink performance, receives stratum high temperature to influence down, can take place the inflation, and the polyurethane glue film can play the cushioning effect this moment, is unlikely to cause the centralizer fracture.
According to the utility model, the resin sand filter is preferably formed by cementing quartz sand and organic silicon cyanate ester resin, and the length of the sand filter is 1.5 m.
According to the preferable selection of the utility model, the stainless steel metal mesh biofilter is composed of double-layer screens, a flow passage cavity is formed between the double-layer screens, a transverse partition plate is welded in the flow passage cavity, the flow passage cavity is divided into a plurality of small chambers, biological ceramsite is filled in each small chamber, each biological ceramsite is loaded with a microbial agent, the total filling volume of the biological ceramsite accounts for 100% of the total volume of the flow passage cavity, the particle size of the biological ceramsite is larger than the particle size of quartz sand of the resin sand filter and the pore size of the double-layer screens, and transverse tie bars and vertical tie bars are welded on the inner sides of the screens, so that the stainless steel metal mesh biofilter mainly plays a supporting role.
The design has the advantages that each biological ceramsite is filled with the microbial agent, microorganisms can be excited under the stratum condition, the ceramsite is used as a carrier to continuously proliferate, various metabolites generated by the growth and metabolism of the microorganisms, such as surfactant, acid and gas, can change the interfacial tension, viscosity and the like of crude oil, can effectively clean substances which are easy to cause sand filter pipe blockage, such as crude oil, stratum sand and the like adhered to the surface of the resin sand filter on the inner layer, and has the function of preventing blockage.
According to the utility model, one end of the shockproof fixing ring is of a corrugated expansion pipe structure, and the other end of the shockproof fixing ring is of a double-layer lantern ring. The corrugated telescopic pipe end is welded with the central pipe, and the double-layer collar end is fixedly connected with the resin sand filter and the stainless steel metal mesh biological filter in an embedded manner.
The advantage of here design lies in, bellows structure can play buffering cushioning effect in the sand screen operation in-process of going into the well, is favorable to protecting the sand screen.
According to the utility model, the inner positioning rubber ring and the outer positioning rubber ring are both silicon rubber O-shaped rings.
Although fig. 1 to 5 are used in all the above embodiments, it is obvious to those skilled in the art that separate drawings are not shown as long as the parts or structural features missing in the embodiments are removed from the drawings. As will be clear to the skilled person. Of course, the embodiments with more components are only the best embodiments, and the embodiments with less components are the basic embodiments, but the basic objects of the utility model can also be achieved, so all of them are within the protection scope of the utility model.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a prevent blockking up high filtration sand pipe, includes center tube and the outside resin sand filter of suit at the center tube, be equipped with the discharge orifice that radially link up on the center tube body, the internal diameter of resin sand filter is greater than the center tube external diameter, its characterized in that still includes:
the stainless steel metal net biofilter is sleeved outside the resin sand filter, and the inner diameter of the stainless steel metal net biofilter is larger than the outer diameter of the resin sand filter.
2. The anti-clogging high infiltration sand pipe according to claim 1, wherein said stainless steel wire mesh biofilter comprises:
the device comprises concentric double-layer metal screens, a plurality of filter screens and a plurality of filter screens, wherein an annular overflowing cavity is formed between the concentric double-layer metal screens, and a transverse partition plate is welded in the overflowing cavity to divide the overflowing cavity into a plurality of small chambers;
the biological ceramsite is filled in the small cavity of the overflowing cavity, each biological ceramsite is loaded with a microbial agent, and the particle size of the biological ceramsite is larger than that of the quartz sand of the resin sand filter and the aperture of the concentric double-layer metal screen.
3. The anti-clogging high infiltration sand pipe according to claim 2, characterized in that the inner side of the concentric double-layer metal screen mesh is welded with a transverse lacing wire and a vertical lacing wire as a support keel.
4. The anti-clogging high infiltration sand pipe according to claim 1, 2 or 3, wherein the resin sand filter is formed by cementing quartz sand and organic silicon cyanate resin, and the length of the sand filter is 1-1.5 m.
5. The anti-clogging high infiltration sand pipe according to claim 1, 2 or 3, wherein the central pipe is provided with connecting screw threads at both ends, the upper end of the central pipe is provided with a male thread to be connected with the centralizer, the lower end of the central pipe is provided with a female thread, the surface of the central pipe is provided with a hoisting clamping groove, the number of overflowing holes on the central pipe body is 80-100/m, and the hole diameter is 6-10 mm.
6. The anti-clogging high infiltration sand pipe according to claim 5, wherein the centralizer comprises a centralizer body and a metal short section, the lower end of the metal short section is in threaded connection with the upper end of the central pipe, the outer wall of the metal short section is provided with a polyurethane glue layer, and the centralizer body is sleeved outside the metal short section and fixed at the polyurethane glue layer.
7. The anti-clogging high infiltration sand pipe according to claim 6, characterized in that the centralizer is made by mixing fly ash, gypsum and lime, and the components are added in the following proportions by weight: 80-90 parts of fly ash, 1-3 parts of gypsum and 5-15 parts of lime; the processing technology comprises the following steps of weighing the components in proportion, adding water, uniformly mixing to a semi-solid state, and curing for 2 hours at 150-180 ℃.
8. The anti-clogging high infiltration sand pipe according to claim 1, 2 or 3, wherein the outer wall of the central pipe is provided with an upper inner positioning rubber ring and a lower inner positioning rubber ring, the upper inner positioning rubber ring seals and seals the upper port of the resin sand filter, and the lower inner positioning rubber ring seals and seals the lower port of the resin sand filter; the outer wall of the resin sand filter is provided with an upper outer positioning rubber ring and a lower outer positioning rubber ring, the upper outer positioning rubber ring seals and blocks an upper port of the stainless steel metal mesh biological filter, and the lower outer positioning rubber ring seals and blocks a lower port of the stainless steel metal mesh biological filter.
9. The anti-clogging high infiltration sand pipe according to claim 1, 2 or 3, wherein the outer wall of the central pipe is further sleeved with an upper shockproof fixing ring and a lower shockproof fixing ring, the upper end of the resin sand filter is embedded into the caulking groove on the lower end face of the upper shockproof fixing ring, the lower end of the resin sand filter is embedded into the caulking groove on the upper end face of the lower shockproof fixing ring, the position where the resin sand filter contacts with the upper shockproof fixing ring and the lower shockproof fixing ring is coated with polyurethane sealant, the inner wall of the upper end of the stainless steel metal mesh biofilter is fixed on the outer wall of the lower end of the upper shockproof fixing ring, the inner wall of the lower end of the stainless steel metal mesh biofilter is fixed on the outer wall of the upper shockproof fixing ring, and the position where the stainless steel metal mesh biofilter contacts with the upper shockproof fixing ring and the lower shockproof fixing ring is coated with polyurethane sealant.
10. The anti-clogging high infiltration sand pipe according to claim 9, wherein the upper end of the upper shockproof fixing ring is of a bellows structure, the lower end of the upper shockproof fixing ring is of a double-layer lantern ring, the bellows structure end of the upper shockproof fixing ring is connected with the central pipe in a welding manner, and the double-layer lantern ring end of the upper shockproof fixing ring is fixedly connected with the resin sand filter in an embedded manner; the lower end of the lower shockproof fixing ring is of a corrugated expansion pipe structure, the upper end of the lower shockproof fixing ring is of a double-layer lantern ring, the corrugated expansion pipe structure end of the lower shockproof fixing ring is connected with the central pipe in a welding mode, and the double-layer lantern ring end of the lower shockproof fixing ring is fixedly connected with the stainless steel metal mesh biofilter in an embedded mode.
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