WO2016127534A1 - 防砂筛管及防砂筛管的制造方法 - Google Patents
防砂筛管及防砂筛管的制造方法 Download PDFInfo
- Publication number
- WO2016127534A1 WO2016127534A1 PCT/CN2015/081646 CN2015081646W WO2016127534A1 WO 2016127534 A1 WO2016127534 A1 WO 2016127534A1 CN 2015081646 W CN2015081646 W CN 2015081646W WO 2016127534 A1 WO2016127534 A1 WO 2016127534A1
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- WIPO (PCT)
- Prior art keywords
- filter
- base pipe
- pipe
- sand control
- tube
- Prior art date
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- 239000004576 sand Substances 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 230000002265 prevention Effects 0.000 title abstract 6
- 238000003466 welding Methods 0.000 claims abstract description 38
- 238000004804 winding Methods 0.000 claims abstract description 8
- 238000004080 punching Methods 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 6
- 238000005325 percolation Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 22
- 230000035699 permeability Effects 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 22
- 239000003129 oil well Substances 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- -1 silt Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
-
- 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
- E21B43/084—Screens comprising woven materials, e.g. mesh or cloth
Definitions
- the invention relates to the field of petroleum equipment, in particular to a method for manufacturing a sand control screen with a small diameter and a sand control screen.
- the sand production in the oil layer is caused by the rock structure damage in the vicinity of the bottom of the well. It is related to the cement strength, stress state, mining conditions, oil well water and other factors. In the field of oil exploitation, especially in the exploitation of loose oil and gas reservoirs, sanding is usually accompanied. Sand production in oil and gas wells will lead to formation loss, stratum collapse, damage casing; cause oil well production to stop production; accelerate wear of downhole string, tools and ground equipment; increase the difficulty of crude oil treatment; increase environmental pollution and transportation treatment and other issues.
- sand control methods for oil and gas wells. According to the sand control principle, it can be roughly divided into sand arch sand control, chemical sand control, thermal coking sand control, mechanical sand control, composite sand control and other sand control methods. In the mechanical sand control process, a sand control screen is usually used as a sand control tool.
- the sand control screen In the production process of the oil well, the sand control screen is placed in the wellbore of the oil well, and the surrounding formation fluid carries the fine sand, mechanical impurities, clay mud and the like through the sand control screen, and the particulate matter in the fluid is
- the sand control screen blocks the external separation, and the fluid flows through the sand control screen to the ground.
- the sand control screens used in oil wells mainly have the following types:
- Slotted liner It is formed by cutting many gaps in a certain order on the casing or oil pipe. The opening area (or over-flow area) is generally only 2% to 6%. Slotted liners are often used for reservoirs with high cementation strength and minimal sand production to prevent collapse of the wellbore, so it is called a liner.
- wire-wound screen mainly consists of two parts of the base pipe and the sieve sleeve, the flow area is 15% to 30%, which can be used in various lithologic reservoirs.
- Clastic reservoirs with low cementation strength and easy sand production are usually used in conjunction with gravel packs, referred to as gravel packs for sand control.
- the gravel filling sand control effect is good, the service life is long, but the process is complicated, the construction time is long, and it is easy to cause pollution to the reservoir in the near well zone.
- the success rate is low.
- metal cotton screen metal cotton has a higher dirt holding capacity.
- a cotton wool screen When using a cotton wool screen to prevent sand, no Gravel packing is done, which simplifies the construction process and shortens the construction time.
- metal wool screens have been widely used in high-angle wells and horizontal well sand control. Metal wool screens also have their shortcomings. When used in fine sand, silt, heavy oil, and high-clay reservoirs, there are still clogging problems.
- Metal mesh screen It is mainly composed of a base pipe and 2 to 5 layers of metal mesh wrapped around the base pipe. The flow area is 25% to 35%. The use, performance and problems are very close to the wire-wound screen.
- the 2 to 5 metal mesh wrapped by the base pipe is surrounded by a metal mesh wound 2 to 5 coils on the base pipe, and the diameter of the metal mesh screen is increased, in order to transfer the metal mesh In the wellbore of the oil well, it is necessary to create a wider wellbore to lower the diameter of the metal mesh screen into the wellbore, increasing the cost of oil exploitation.
- the present invention provides a method for manufacturing a sand control screen and a sand control screen, the main purpose of which is to reduce the diameter of the sand control screen, so as to reduce the diameter of the sand control screen into the oil and gas well.
- the present invention mainly provides the following technical solutions:
- an embodiment of the present invention provides a sand control screen comprising:
- the filter member comprising a filter mesh having an opening of a first size aperture, the first side of the filter mesh and the second side of the filter mesh being welded by a soldering process a first sleeve structure, the first sleeve structure sleeved on an outer side of the base tube to form a first filter layer of the base tube;
- first side of the filter mesh is the opposite side of the second side of the filter mesh
- An aperture of the opening formed by the opening at the first side of the filter and the opening at the second side of the filter at the welded joint of the first sleeve structure The size is less than or equal to the first size.
- the sand control screen of the foregoing wherein the filter component comprises a layer of seepage mesh, the seepage mesh has an opening of a second size aperture, the seepage web is rolled into a second sleeve structure, the second The sleeve structure is sleeved outside the base pipe;
- the seepage network is located between the outer side of the base pipe and the filter mesh, and the second size aperture is larger than the first size aperture.
- the sand control screen of the foregoing wherein the filter mesh is a wire woven dense mesh;
- the seepage web is a wire braided square mesh.
- the filter component further includes a filter protection tube, and a wall of the filter protection tube is provided with a punch;
- the base pipe, the filter net, and the seepage net are disposed in the filter protection tube, and the filter protection tube constitutes a second filter layer of the base pipe;
- the connecting ring is disposed on two sides of the base pipe, the inner ring of the connecting ring is welded and fixed to the outer wall of the base pipe, and the outer ring/side wall of the connecting ring and the filter protection tube are End welding.
- a punching support tube is disposed between the base pipe and the filter member
- the connecting ring includes a first set of connecting rings and a second set of connecting rings respectively located at two sides of the filtering component;
- the first set of connecting rings is provided with a first set of step faces at a first distance from the pipe wall of the base pipe, and a second set of step faces at a second distance from the pipe wall of the base pipe, the second The distance is greater than the first distance;
- the first set of connecting rings are connected to the pipe wall of the base pipe;
- Two sides of the seepage net of the filter member are disposed on the first set of step faces of the first set of connecting rings;
- Two sides of the filter mesh of the filter component are disposed on the second set of step faces of the first set of connecting rings;
- the second set of connecting rings is provided with a third set of stepped surfaces at a third distance from the tube wall of the base pipe, and the third distance is greater than the second distance;
- the second set of connecting rings are connected to the pipe wall of the base pipe;
- the filter protection tube is disposed on a third set of step faces of the second set of connecting rings;
- the second set of connecting rings, the filter protection tube and the base tube enclose a receiving space
- the punched support tube, the filtered first layer, the seepage web, and the first set of connecting rings are located within the receiving space.
- an embodiment of the present invention provides a method of manufacturing a sand control screen comprising:
- first sleeve structure having a first size aperture opening and a second side edge of the filter mesh by a welding process to form a first sleeve structure having a layer of the filter mesh, the first a sleeve structure as a first filter layer of the filter member;
- the filter member is sleeved on the base pipe
- an opening formed by the opening at the first side of the filter mesh and the opening at the second side of the filter mesh is less than or equal to the first size, and the first side of the filter is the opposite side of the second side of the filter.
- the percolating layer is placed inside the first filter layer
- the second size aperture is larger than the first size aperture.
- the filter component further includes: a filter protection tube and a punching support tube; correspondingly, the filter member is sleeved on the base tube, specifically:
- the seepage layer and the first filter layer are welded to the outer wall of the punching support tube by a single welding process
- the punching support tube welded with the pervious layer and the first filter layer is sleeved on the base pipe;
- the filter protection tube is sleeved on the outer side of the first filter layer
- the first filter layer and the filter protection tube have a preset distance therebetween.
- a connecting ring is disposed on both sides of the base pipe in the axial direction, so that the connecting ring is located on both sides of the first filter layer;
- the inner ring of the connecting ring is welded and fixed to the outer wall of the base pipe, and the outer ring/side wall of the connecting ring is welded to both ends of the filter protection tube.
- a first set of step faces at a first distance from a pipe wall of the base pipe
- a second set of step faces at a second distance from a pipe wall of the base pipe The second distance is greater than the first distance
- the method for manufacturing the sand control screen and the sand control screen provided by the technical solution of the present invention has at least the following advantages:
- the through hole of the base pipe of the sand control screen provided by the technical solution of the present invention is provided with a through hole, and the filter component comprises a filter mesh having an opening of a first size aperture, the filter mesh Forming a first sleeve structure on one side and the second side of the filter by a welding process, and the first sleeve structure is sleeved on the outer side of the base tube to constitute a first filter of the base tube Floor.
- the first side of the filter mesh is the opposite side of the second side of the filter mesh.
- a knot of 2 to 5 rolls of metal mesh is wound around the periphery of the base pipe
- a layer of filter is disposed outside the base pipe, that is, the filter roll is rolled into a cylindrical first sleeve structure, and when the first side and the second side are welded, the first side is controlled
- the aperture size of the newly formed opening at the second side weld is such that the newly formed opening aperture is smaller than the first size.
- the sand control performance of the sand control screen is not reduced, and the diameter of the sand control screen can be reduced, and the sand control screen with the reduced diameter can be easily lowered into the oil and gas well.
- the through hole of the base pipe of the sand control screen provided by the technical solution of the present invention is provided with a through hole
- the filter component comprises a filter mesh having an opening of a first size aperture, the filter mesh Forming a first sleeve structure on one side and the second side of the filter by a welding process, and the first sleeve structure is sleeved on the outer side of the base tube to constitute a first filter of the base tube Floor.
- the first side of the filter mesh is the opposite side of the second side of the filter mesh.
- the oil leakage holes of the sleeve structure formed by the metal mesh of 2 to 5 rolls are superimposed on each other and superimposed on each other.
- the position of the oil leakage hole is different, which will cause the size of the oil leakage hole after the superposition to become smaller and uneven, so that the permeability of the sand control screen is unstable and poor, and a filter is arranged outside the base pipe.
- a mesh that is, a first sleeve structure in which the filter roll is formed into a cylindrical shape, and when the first side edge and the second side edge are welded, the newly formed opening of the first side edge and the second side edge is controlled
- the aperture size satisfies the newly constructed aperture aperture smaller than the first dimension.
- the sand control screen provided by the technical solution of the present invention can make the oil leakage of the first size aperture opening on the first sleeve structure relative to the sleeve structure formed by the metal mesh of 2 to 5 rolls in the prior art.
- the hole is relatively uniform, which improves the permeability and anti-blocking ability of the sand control screen.
- the through hole of the base pipe of the sand control screen provided by the technical solution of the present invention is provided with a through hole
- the filter component comprises a filter mesh having an opening of a first size aperture, the filter mesh Forming a first sleeve structure on one side and the second side of the filter by a welding process, and the first sleeve structure is sleeved on the outer side of the base tube to constitute a first filter of the base tube Floor.
- the first side of the filter mesh is the opposite side of the second side of the filter mesh.
- a knot of 2 to 5 rolls of metal mesh is wound around the periphery of the base pipe
- a layer of filter is disposed outside the base pipe, that is, the filter roll is rolled into a cylindrical first sleeve structure, and when the first side and the second side are welded, the first side is controlled
- the aperture size of the newly formed opening at the second side weld is such that the newly formed opening aperture is smaller than the first size.
- the sand control screen provided by the technical solution of the present invention can simplify the structure, save production materials, and reduce production cost.
- Embodiment 1 is a schematic structural view of a sand control screen provided by Embodiment 1 of the present invention.
- Figure 2 is a schematic enlarged view of A of Figure 1;
- Figure 3 is a schematic enlarged view of the structure B of Figure 1;
- FIG. 4 is a schematic view showing a process flow of a method for manufacturing a sand control screen provided by Embodiment 2 of the present invention
- FIG. 5 is a schematic view showing the process flow of a method for manufacturing a specific sand control screen provided in Embodiment 2 of the present invention.
- the invention solves the problem that the diameter of the sand control screen tube is large in the prior art, and provides a method for manufacturing the sand control screen tube and the sand control screen tube, so as to reduce the diameter of the sand control screen tube, so as to reduce the diameter of the tube.
- the sand control screen is placed in the eye of the oil and gas well.
- a sand control screen provided by the present invention includes:
- a filter member comprising a filter mesh having a first size
- An opening of the aperture, the first side of the filter and the second side of the filter are welded by a welding process to form a first sleeve structure, and the first sleeve structure is sleeved on the base tube
- the outer side constitutes a first filter layer of the base pipe
- first side of the filter mesh is the opposite side of the second side of the filter mesh
- An aperture of the opening formed by the opening at the first side of the filter and the opening at the second side of the filter at the welded joint of the first sleeve structure The size is less than or equal to the first size.
- a method for manufacturing a sand control screen provided by the present invention includes:
- first sleeve structure having a first size aperture opening and a second side edge of the filter mesh by a welding process to form a first sleeve structure having a layer of the filter mesh, the first a sleeve structure as a first filter layer of the filter member;
- the filter member is sleeved on the base pipe
- an opening formed by the opening at the first side of the filter mesh and the opening at the second side of the filter mesh is less than or equal to the first size, and the first side of the filter is the opposite side of the second side of the filter.
- the pipe wall of the sand control screen provided by the technical solution of the present invention is provided with a through hole, and the filter component comprises a filter mesh having an opening of a first size aperture, the first side of the filter mesh
- a first sleeve structure is formed by welding with a second side of the filter by a welding process, and the first sleeve structure is sleeved on the outer side of the base tube to form a first filter layer of the base tube.
- the first side of the filter mesh is the opposite side of the second side of the filter mesh.
- An aperture of the opening formed by the opening at the first side of the filter and the opening at the second side of the filter at the welded joint of the first sleeve structure The size is less than or equal to the first size.
- the structure of the metal mesh of 2 to 5 rolls is wound around the periphery of the base pipe, and a filter net is disposed outside the base pipe, that is, the first sleeve structure is rolled into a cylindrical shape. Controlling the aperture size of the newly formed opening at the first side edge and the second side edge welding when the first side edge and the second side edge are welded, and satisfying the newly constructed opening aperture is smaller than the first One size.
- the sand control performance of the sand control screen is not reduced, and the diameter of the sand control screen can be reduced, and the sand control screen with the reduced diameter can be easily lowered into the oil and gas well.
- a and B in this context is merely an association that describes an associated object, indicating that there may be three relationships, for example, A and/or B.
- a and B can be included at the same time, and can be separate. If A exists, B may exist alone, and it is possible to provide any of the above three cases.
- a sand control screen according to Embodiment 1 of the present invention comprises: a base pipe 1 and a filter member 2.
- a through hole 11 is formed in the pipe wall of the base pipe 1.
- the filter member 2 includes a filter mesh 21 having an opening of a first size aperture, and a first side of the filter mesh 21 and a second side of the filter mesh 21 are passed through a soldering process.
- the welding forms a first sleeve structure, and the first sleeve structure is sleeved on the outside of the base pipe 1 to constitute a first filter layer of the base pipe 1.
- the first side of the filter 21 is the opposite side of the second side of the filter 21 .
- the base pipe can adopt an oil standard of the API standard, or a joint of the oil sleeve is arranged at both ends of the steel pipe, and a through hole is formed in the steel pipe.
- the surrounding formation fluid carries the formation fine sand, mechanical impurities, clay mud and the like through the sand control screen, and the particulate matter in the fluid is taken by the sand control screen.
- the first filter layer blocks the separation outside the sand control screen, and the fluid passes through the filter member of the sand control screen, the through hole of the base pipe, and then flows to the ground through the base pipe.
- the wall of the base pipe of the sand control screen provided by the first embodiment of the present invention is provided with a through hole
- the filter component comprises a filter net having an opening of a first size aperture
- the first of the filter net Forming a first sleeve structure by welding with a second side of the filter and a second side of the filter, the first sleeve structure being sleeved on the outer side of the base tube to form a first filter layer of the base tube .
- the first side of the filter mesh is the opposite side of the second side of the filter mesh.
- An aperture of the opening formed by the opening at the first side of the filter and the opening at the second side of the filter at the welded joint of the first sleeve structure The size is less than or equal to the first size.
- a knot of 2 to 5 rolls of metal mesh is wound around the periphery of the base pipe
- a layer of filter is disposed outside the base pipe, that is, the filter roll is rolled into a cylindrical first sleeve structure, and when the first side and the second side are welded, the first side is controlled
- the aperture size of the newly formed opening at the second side weld is such that the newly formed opening aperture is smaller than the first size.
- the sand control performance of the sand control screen is not reduced, and the diameter of the sand control screen can be reduced, and the sand control screen with the reduced diameter can be easily lowered into the oil and gas well.
- the filter roll becomes a cylindrical first sleeve structure, and when the first side edge and the second side edge are welded, the aperture size of the newly formed opening of the first side edge and the second side edge is controlled
- the opening aperture that satisfies the new configuration is smaller than the first size.
- the opening of the first size aperture on the first sleeve structure can be made uniform, and the permeability and anti-blocking capability of the sand control screen are improved.
- the sand control screen provided by the first embodiment of the present invention can simplify the structure, save production materials, and reduce production cost.
- the sand control screen according to the first embodiment of the present invention further provides an embodiment in which the filter member includes a layer of seepage net 22,
- the seepage web 22 has an opening of a second size aperture, the seepage web 22 is wound into a second sleeve structure, and the second sleeve structure is sleeved outside the base tube 1.
- the seepage network is located between the outer side of the base pipe and the filter mesh, and the second size aperture is larger than the first size aperture.
- the seepage net can function as a confluence, and the liquid filtered by the filter without superimposed on the outer side of the through hole of the base pipe wall flows to the seepage net
- the opening of the second size flows into the through hole of the base pipe to increase the permeability of the sand control screen.
- the filter mesh is a wire braided mesh
- the seepage mesh is a wire braided square mesh
- the sand control screen described in the first embodiment further includes: a connecting ring located on two sides of the filter member.
- the filter component further includes a filter protection tube, the filter A punch is provided on the wall of the protective tube.
- the base pipe, the filter net, and the seepage net are disposed in the filter protection tube, and the filter protection tube constitutes a second filter layer of the base pipe.
- the connecting ring is disposed on two sides of the base pipe, the inner ring of the connecting ring is welded and fixed to the outer wall of the base pipe, and the outer ring/side wall of the connecting ring and the filter protection tube are End welding. Since the material of the filter is relatively easily destroyed, the filter protection tube is used to protect the filter. In addition, the filter protection tube and the filter network can also function as a staged filtration.
- the connecting ring is used to secure the filter member to the base pipe.
- the sand control screen according to the first embodiment of the present invention further provides an embodiment in which the base pipe 1 and the filter member 2 are disposed.
- a punching support tube 3 is provided.
- the connecting ring includes a first set of connecting rings 41 and a second set of connecting rings 42 respectively located on both sides of the filter member.
- the first set of connecting rings 41 is provided with a first set of step faces 411 at a first distance from the pipe wall of the base pipe 1, and a second set of step faces 412 at a second distance from the pipe wall of the base pipe 1. The second distance is greater than the first distance.
- the first set of connecting rings 41 are connected to the wall of the base pipe 1.
- Both sides of the seepage web 22 of the filter member 2 are disposed on the first set of step faces 411 of the first set of connecting rings 41. Both sides of the filter mesh 21 of the filter member 2 are disposed on the second set of step faces 412 of the first set of connecting rings 41.
- the second set of connecting rings 42 is provided with a third set of stepped surfaces 421 at a third distance from the wall of the base pipe, and the third distance is greater than the second distance.
- the second set of connecting rings 42 are connected to the wall of the base pipe 1.
- the filter protection tube 5 is disposed on the third set of step faces 421 of the second set of connection rings 42.
- the second set of connecting rings 42, the filter protection tube 5 and the base pipe 1 enclose an accommodation space.
- the punching support tube 3, the first filter layer, the seepage web, and the first set of connecting rings 41 are located in the receiving space.
- the filter net and the seepage net can be welded to the punching support tube with a small mass, and then the punching support tube is sleeved on the base pipe to facilitate assembly of the filter net and the seepage net.
- the filtered seepage mesh and the filter mesh are sequentially wound on the punching support tube. The punching support tube is then disposed outside the tube wall of the base tube.
- the connecting ring is disposed in two groups, and the first group of connecting rings are disposed on the base pipe, and the two sides of the seepage net are wound on the two sides of the punching support tube a first set of step faces of a set of connecting rings, the two sides of the filter mesh are wrapped around The second set of step faces of the first set of connecting rings.
- the filter protection tube is further disposed outside the base tube, a second set of connecting rings is passed through the base tube, and pressed against both sides of the filter protection tube, and the A filter protection tube is disposed on the third set of step faces of the second set of connecting rings.
- the fixing method can be welded. Dividing the connecting ring into two parts, the first set of connecting rings is used for fixing the filter net and the seepage net, and the second set of connecting rings is used for fixing the filter protection tube, and the filter protection tube is disposed opposite to only a pair of connecting rings. The side can facilitate the assembly of the sand control screen and improve the assembly efficiency.
- the welding net and the seepage net may be welded on the punching support tube by a welding process.
- the punching support tube has a through hole, and the punching support tube is provided with a welding zone for welding the seepage net and the filter net, and an opening area for opening the through hole.
- the filter mesh and the butted portion of the seepage mesh to be welded are wound to the weld zone of the punched support tube and then welded.
- a second embodiment of the present invention provides a method for manufacturing a sand control screen, comprising:
- the first side of the filter having the first size aperture opening and the second side of the filter are welded by a welding process to form a first sleeve structure having a layer of the filter.
- a first sleeve structure as a first filter layer of the filter member;
- the filter member is sleeved on the base pipe.
- an opening formed by the opening at the first side of the filter mesh and the opening at the second side of the filter mesh is less than or equal to the first size, and the first side of the filter is the opposite side of the second side of the filter.
- the sand control screen prepared by the method for manufacturing the sand control screen provided by the second embodiment of the present invention does not reduce the sand control performance of the sand control screen tube when the base pipe of the same size is used, and can reduce the diameter of the sand control screen tube. It is convenient to reduce the diameter of the sand control screen into the oil and gas well.
- the first side of the filter having the first size aperture opening and the second side of the filter are welded by a welding process to form a layer of the filtration.
- the first sleeve structure of the net the specific welding process is:
- the first way the first side of the filter meshes with the second side of the filter net, And then welding the first side of the filter to the second side of the filter;
- the method for manufacturing the sand control screen further includes:
- the percolating layer is placed inside the first filter layer.
- the second size aperture is larger than the first size aperture.
- the filter component further includes: a filter protection tube and a punch support tube; correspondingly, the filter member is sleeved on the base tube, specifically :
- the seepage layer and the first filter layer are welded to the outer wall of the punching support tube by a single welding process
- the punching support tube welded with the pervious layer and the first filter layer is sleeved on the base pipe;
- the filter protection tube is sleeved on the outer side of the first filter layer
- the first filter layer and the filter protection tube have a preset distance therebetween.
- the preset distance is a value greater than zero. After the filter protection tube is bent by an external force, it does not directly contact the filter net located in the filter protection tube.
- the primary welding process refers to welding the permeate layer and the first filter layer to the punching support tube during the welding process. After the pervious layer is wound on the punching support tube, when the filter is wound, the area to be welded of the filter mesh and the area to be welded of the permeate layer are superimposed, and the welding can be completed in one time.
- the method for manufacturing the sand control screen further includes:
- a connecting ring is disposed on both sides of the base pipe in the axial direction, so that the connecting ring is located on both sides of the first filter layer;
- the inner ring of the connecting ring is welded and fixed to the outer wall of the base pipe, and the outer ring/side wall of the connecting ring is welded to both ends of the filter protection tube.
- a first set of step faces at a first distance from a pipe wall of the base pipe
- a second set of step faces at a second distance from a pipe wall of the base pipe The second distance is greater than the first distance
- the first set of table interfaces, the second set of step faces, and the third set of step faces are all annular faces.
- welding may be performed on the one-cycle ring of the second set of step faces, and the two sides of the filter mesh are welded to the second group. On the step surface.
- the welding may be performed on the one-cycle ring of the third set of stepped surfaces, and the two sides of the filter protection tube are welded to the first Three sets of step faces.
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Abstract
公开了一种防砂筛管及防砂筛管的制造方法。防砂筛管包括：基管（1）以及过滤部件（2）；基管（1）的管壁上设置有通孔（11）；过滤部件（2）包括一层过滤网（21），过滤网（21）具有第一尺寸孔径的开孔，过滤网（21）的第一侧边与过滤网（21）的第二侧边通过焊接工艺焊接形成第一套筒结构，第一套筒结构套设在基管（1）的外侧构成了基管（1）的第一过滤层；由过滤网（21）的第一侧边处的开孔与过滤网（21）的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于第一尺寸。相对现有技术在基管外围缠绕2～5卷的金属网的结构方式，能够降低防砂筛管的管径，便于将减小管径的防砂筛管下入油气井眼内。另外，还可提高防砂筛管的渗透率、抗堵能力。
Description
本发明涉及石油设备领域，特别是涉及一种直径较小的防砂筛管及防砂筛管的制造方法。
油层出砂是由于井底附近地带的岩石结构破坏引起的现象，它与岩石的胶结强度、应力状态、开采条件、油井含水等因素有关。在石油开采领域，特别是对于疏松油气藏开采中，通常会伴随有出砂现象。油气井出砂会导致地层亏空，地层坍塌，损坏套管；造成油井减产停产；加快磨损井下管柱、工具及地面设备；增加原油处理难度；增加环境污染及运输处理等诸多问题。
目前，油、气井防砂方法很多，根据防砂原理，大致可以分为砂拱防砂、化学防砂、热力焦化防砂、机械防砂、复合防砂及其它防砂方法。在机械防砂工艺中，通常使用防砂筛管作为防砂的工具。在油井生产过程中，所述防砂筛管下入油井的井眼内，周围地层流体携带地层细砂、机械杂质、黏土泥质等物质通过所述防砂筛管时，流体中的颗粒物质被所述防砂筛管阻挡在外部分离，流体通过所述防砂筛管流至地面。其中，油井中使用的防砂筛管主要有以下几种：
1、割缝衬管：是在套管或油管上面按照一定排列顺序割出许多缝隙而成，开孔面积(或过流面积)一般只有2％～6％。割缝衬管常用于胶结强度高、出砂极少的储层，以防止井壁坍塌为主要目的，所以叫衬管。
2、绕丝筛管：主要由基管和筛套两部分组成，过流面积为15％～30％，可用于各种岩性的储层中。在胶结强度低、易出砂的碎屑岩储层通常要和砾石充填配合使用，简称砾石充填防砂。砾石充填防砂的效果好，寿命长，但工艺复杂，施工时间长，易对近井地带储层造成污染，在大斜度井和水平井中施工时，成功率低。
3、金属棉筛管：金属棉的纳污能力较高。使用金属棉筛管防砂时，不
做砾石充填，这样就简化了施工工艺，缩短了施工时间。近年来，在大斜度井和水平井防砂中，金属棉筛管获得了广泛的应用。金属棉筛管也有其不足之处，在细砂、粉砂、稠油、黏土含量高的储层使用时，仍存在堵塞问题。
4、金属网筛管：主要由基管和包裹在基管外面的2～5层金属网构成，过流面积为25％～35％，其用途、性能和问题与绕丝筛管非常接近。
其中，在金属网筛管上，基管包裹的2～5层金属网是由一金属网在基管上缠绕2～5卷而围成，增加了金属网筛管的直径，为了将金属网筛管下入石油井的井眼中，需要打造出较宽的井眼，以将直径较大的金属网筛管下入井眼中，增加了石油开采的成本。
发明内容
有鉴于此，本发明提供一种防砂筛管及防砂筛管的制造方法，主要目的在于降低防砂筛管的管径，以便于将减小管径的防砂筛管下入油气井眼内。
为达到上述目的，本发明主要提供如下技术方案：
一方面，本发明的实施例提供一种防砂筛管包括：
基管，所述基管的管壁上设置有通孔；
过滤部件，所述过滤部件包括一层过滤网，所述过滤网具有第一尺寸孔径的开孔，所述过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成第一套筒结构，所述第一套筒结构套设在所述基管的外侧构成了所述基管的第一过滤层；
其中，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边；
在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸。
本发明的目的及解决其技术问题还可采用以下技术措施进一步实现。
可选的，前述的防砂筛管，其中所述过滤部件包括一层渗流网，所述渗流网具有第二尺寸孔径的开孔，所述渗流网卷成第二套筒结构，所述第二套筒结构套设在所述基管外；
其中，所述渗流网位于所述基管的外侧与所述过滤网之间，所述第二尺寸孔径大于所述第一尺寸孔径。
可选的，前述的防砂筛管，其中所述过滤网为金属丝编织密纹网；
和/或
所述渗流网为金属丝编织方孔网。
可选的，前述的防砂筛管，其中
还包括：
位于所述过滤部件两侧的连接环；
所述过滤部件还包括过滤保护管，所述过滤保护管的管壁上设置有冲缝；
所述基管、所述过滤网、所述渗流网穿设在所述过滤保护管内，所述过滤保护管构成了所述基管的第二过滤层；
所述连接环穿设在所述基管的两侧，所述连接环的内环与所述基管的外壁焊接固定，所述连接环的外环/侧壁与所述过滤保护管的两端焊接。
可选的，前述的防砂筛管，其中
所述基管与所述过滤部件之间设置有冲孔支撑管；
所述连接环包括分别位于所述过滤部件两侧的第一组连接环以及第二组连接环；
所述第一组连接环上设置有距所述基管的管壁第一距离的第一组台阶面、距所述基管的管壁第二距离的第二组台阶面，所述第二距离大于所述第一距离；
所述第一组连接环与所述基管的管壁连接；
所述过滤部件的渗流网的两侧设置在所述第一组连接环的第一组台阶面上；
所述过滤部件的过滤网的两侧设置在所述第一组连接环的第二组台阶面上；
所述第二组连接环上设置有距所述基管的管壁第三距离的第三组台阶面，所述第三距离大于所述第二距离；
所述第二组连接环与所述基管的管壁连接；
所述过滤保护管设置在所述第二组连接环的第三组台阶面上；
所述第二组连接环、所述过滤保护管以及所述基管围出容纳空间；
所述冲孔支撑管、所述过滤第一层、所述渗流网以及所述第一组连接环位于所述容纳空间内。
另一方面，本发明的实施例提供一种防砂筛管的制造方法，包括：
将具有第一尺寸孔径开孔的过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成具有一层所述过滤网的第一套筒结构，将所述第一套筒结构作为过滤部件的第一过滤层；
将所述过滤部件套设在基管上；
其中，在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边。
本发明的目的及解决其技术问题还可采用以下技术措施进一步实现。
可选的，前述的防砂筛管的制造方法，其中
还包括：
将具有第二尺寸孔径开孔的渗流网卷成第二套筒结构，所述第二套筒结构作为所述过滤部件的渗流层；
将所述渗流层置于所述第一过滤层的内侧；
其中，所述第二尺寸孔径大于所述第一尺寸孔径。
可选的，前述的防砂筛管的制造方法，其中
所述过滤部件还包括：过滤保护管和冲孔支撑管；相应的，所述将所述过滤部件套设在基管上，具体为：
将所述渗流层和所述第一过滤层通过一次焊接工艺焊接在所述冲孔支撑管的外壁上；
将焊接有所述渗流层和所述第一过滤层的所述冲孔支撑管套设在所述基管上；
在所述第一过滤层的外侧套设所述过滤保护管；
其中，所述第一过滤层和所述过滤保护管之间具有预设距离。
可选的，前述的防砂筛管的制造方法，其中
还包括：
在所述基管的沿轴线方向上的两侧穿设连接环，使连接环位于所述第一过滤层的两侧；
将所述连接环的内环与所述基管的外壁焊接固定，将所述连接环的外环/侧壁与所述过滤保护管的两端焊接。
可选的，前述的防砂筛管的制造方法，其中
在所述连接环的第一组连接环上机加工出距所述基管的管壁第一距离的第一组台阶面、距所述基管的管壁第二距离的第二组台阶面，所述第二距离大于所述第一距离；
将所述第一组连接环与所述基管的管壁焊接；
将所述过滤部件的渗流网的两侧缠绕在所述第一组连接环的第一组台阶面上；
将所述过滤部件的过滤网的两侧缠绕在所述第一组连接环的第二组台阶面上；
在所述连接环的第二组连接环上机加工出距所述基管的管壁第三距离的第三组台阶面，所述第三距离大于所述第二距离；
将所述第二组连接环与所述基管的管壁连接；
将所述过滤保护管的两侧设置在所述第二组连接环的第三组台阶面上，使所述第二组连接环、所述过滤保护管以及所述基管围出容纳空间，将所述冲孔支撑管、所述第一过滤层、所述渗流网以及所述第一组连接环位于所述容纳空间内。
借由上述技术方案，本发明技术方案提供的防砂筛管及防砂筛管的制造方法至少具有下列优点：
一、本发明技术方案提供的防砂筛管的基管的管壁上设置有通孔，过滤部件包括有一层过滤网，所述过滤网具有第一尺寸孔径的开孔，所述过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成第一套筒结构，所述第一套筒结构套设在所述基管的外侧构成了所述基管的第一过滤层。其中，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边。在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸。相对于现有技术中，在所述基管外围缠绕2～5卷的金属网的结
构方式，改为在基管外设置一层过滤网，即将过滤网卷成为筒状的第一套筒结构，在焊接第一侧边与第二侧边时，控制所述第一侧边与所述第二侧边焊接处新构成的开孔的孔径大小，满足新构成的开孔孔径小于所述第一尺寸。在采用相同尺寸的基管情况下，不会降低防砂筛管的防砂性能，另外能够降低防砂筛管的管径，便于将减小管径的防砂筛管下入油气井眼内。
二、本发明技术方案提供的防砂筛管的基管的管壁上设置有通孔，过滤部件包括有一层过滤网，所述过滤网具有第一尺寸孔径的开孔，所述过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成第一套筒结构，所述第一套筒结构套设在所述基管的外侧构成了所述基管的第一过滤层。其中，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边。在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸。相对于现有技术中，在所述基管外围缠绕2～5卷的金属网的结构方式时，2～5卷的金属网上构成的套筒结构的漏油孔会相互叠加在一起，相互叠加的漏油孔的位置不一，会导致叠加后的漏油孔的尺寸变小，且不均匀，使防砂筛管的渗透性能不稳定，且较差，改为在基管外设置一层过滤网，即将过滤网卷成为筒状的第一套筒结构，在焊接第一侧边与第二侧边时，控制所述第一侧边与所述第二侧边焊接处新构成的开孔的孔径大小，满足新构成的开孔孔径小于所述第一尺寸。本发明技术方案提供的防砂筛管能够使所述第一套筒结构上的第一尺寸孔径的开孔相对于现有技术中由2～5卷的金属网的构成的套筒结构的漏油孔较为均匀，提高了防砂筛管的渗透率、抗堵能力。
三、本发明技术方案提供的防砂筛管的基管的管壁上设置有通孔，过滤部件包括有一层过滤网，所述过滤网具有第一尺寸孔径的开孔，所述过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成第一套筒结构，所述第一套筒结构套设在所述基管的外侧构成了所述基管的第一过滤层。其中，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边。在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸。相对于现有技术中，在所述基管外围缠绕2～5卷的金属网的结
构方式，改为在基管外设置一层过滤网，即将过滤网卷成为筒状的第一套筒结构，在焊接第一侧边与第二侧边时，控制所述第一侧边与所述第二侧边焊接处新构成的开孔的孔径大小，满足新构成的开孔孔径小于所述第一尺寸。在采用相同尺寸的基管情况下，本发明技术方案提供的防砂筛管能够简化结构，节约生产材料，降低生产成本。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，并可依照说明书的内容予以实施，以下以本发明的较佳实施例并配合附图详细说明如后。
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1是本发明的实施例一提供的一种防砂筛管的结构示意图；
图2是图1中A的放大结构示意图；
图3是图1中B的放大结构示意图；
图4是本发明的实施例二提供的一种防砂筛管的制造方法的工艺流程示意图；
图5是本发明的实施例二提供的一种具体的防砂筛管的制造方法的工艺流程示意图。
本发明为解决现有技术中防砂筛管管径较大的问题，提供了一种防砂筛管及防砂筛管的制造方法，以在降低防砂筛管的管径，以便于将减小管径的防砂筛管下入油气井眼内。
本发明实施例的技术方案为解决上述技术问题，总体思路如下：
本发明提供的一种防砂筛管包括：
基管，所述基管的管壁上设置有通孔；
过滤部件，所述过滤部件包括一层过滤网，所述过滤网具有第一尺寸
孔径的开孔，所述过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成第一套筒结构，所述第一套筒结构套设在所述基管的外侧构成了所述基管的第一过滤层；
其中，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边；
在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸。
本发明提供的一种防砂筛管的制造方法包括：
将具有第一尺寸孔径开孔的过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成具有一层所述过滤网的第一套筒结构，将所述第一套筒结构作为过滤部件的第一过滤层；
将所述过滤部件套设在基管上；
其中，在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边。
本发明技术方案提供的防砂筛管的基管的管壁上设置有通孔，过滤部件包括有一层过滤网，所述过滤网具有第一尺寸孔径的开孔，所述过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成第一套筒结构，所述第一套筒结构套设在所述基管的外侧构成了所述基管的第一过滤层。其中，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边。在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸。相对于现有技术中，在所述基管外围缠绕2～5卷的金属网的结构方式，改为在基管外设置一层过滤网，即将过滤网卷成为筒状的第一套筒结构，在焊接第一侧边与第二侧边时，控制所述第一侧边与所述第二侧边焊接处新构成的开孔的孔径大小，满足新构成的开孔孔径小于所述第一尺寸。在采用相同尺寸的基管情况下，不会降低防砂筛管的防砂性能，另外能够降低防砂筛管的管径，便于将减小管径的防砂筛管下入油气井眼内。
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功
效,以下结合附图及较佳实施例，对依据本发明提出的防砂筛管及防砂筛管的制造方法其具体实施方式、结构、特征及其功效，详细说明如后。在下述说明中，不同的“一实施例”或“实施例”指的不一定是同一实施例。此外，一或多个实施例中的特定特征、结构、或特点可由任何合适形式组合。
本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，具体的理解为：可以同时包含有A与B，可以单独存在A，也可以单独存在B，能够具备上述三种任一中情况。
如图1和图2所示，本发明的实施例一提出的一种防砂筛管，其包括：基管1以及过滤部件2。所述基管1的管壁上设置有通孔11。所述过滤部件2包括一层过滤网21，所述过滤网21具有第一尺寸孔径的开孔，所述过滤网21的第一侧边与所述过滤网21的第二侧边通过焊接工艺焊接形成第一套筒结构，所述第一套筒结构套设在所述基管1的外侧构成了所述基管1的第一过滤层。其中，所述过滤网21的第一侧边为所述过滤网21的第二侧边的相对侧边。在所述第一套筒结构的焊接接缝处，由所述过滤网21的第一侧边处的开孔与所述过滤网21的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸。其中，所述基管可采用API标准的油套管，或在钢管两端设置连接油套接头，并在钢管上开设通孔而成。
所述防砂筛管下入油井的井眼内后，周围地层流体携带地层细砂、机械杂质、黏土泥质等物质通过所述防砂筛管时，流体中的颗粒物质被所述防砂筛管的第一过滤层阻挡在防砂筛管外部分离，流体通过所述防砂筛管的过滤部件、所述基管的通孔后经所述基管流至地面。
本发明实施例一提供的防砂筛管的基管的管壁上设置有通孔，过滤部件包括有一层过滤网，所述过滤网具有第一尺寸孔径的开孔，所述过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成第一套筒结构，所述第一套筒结构套设在所述基管的外侧构成了所述基管的第一过滤层。其中，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边。在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸。相对于现有技术中，在所述基管外围缠绕2～5卷的金属网的结
构方式，改为在基管外设置一层过滤网，即将过滤网卷成为筒状的第一套筒结构，在焊接第一侧边与第二侧边时，控制所述第一侧边与所述第二侧边焊接处新构成的开孔的孔径大小，满足新构成的开孔孔径小于所述第一尺寸。在采用相同尺寸的基管情况下，不会降低防砂筛管的防砂性能，另外能够降低防砂筛管的管径，便于将减小管径的防砂筛管下入油气井眼内。
另外，相对于现有技术中，在所述基管外围缠绕2～5卷的金属网的结构方式时，2～5卷的金属网上的漏油孔会相互叠加在一起，相互叠加的漏油孔的位置不一，会导致叠加后的漏油孔的尺寸变小，且不均匀，使防砂筛管的渗透性能不稳定，且较差，改为在基管外设置一层过滤网，即将过滤网卷成为筒状的第一套筒结构，在焊接第一侧边与第二侧边时，控制所述第一侧边与所述第二侧边焊接处新构成的开孔的孔径大小，满足新构成的开孔孔径小于所述第一尺寸。能够使所述第一套筒结构上的第一尺寸孔径的开孔较为均匀，提高了防砂筛管的渗透率、抗堵能力。
同时，在采用相同尺寸的基管情况下，本发明实施例一提供的防砂筛管能够简化结构，节约生产材料，降低生产成本。
进一步的，为了提高防砂筛管的渗透效果，如图2所示，本发明的实施例一中所述的防砂筛管还提供如下的实施方式，其中所述过滤部件包括一层渗流网22，所述渗流网22具有第二尺寸孔径的开孔，所述渗流网22卷成第二套筒结构，所述第二套筒结构套设在所述基管1外。其中，所述渗流网位于所述基管的外侧与所述过滤网之间，所述第二尺寸孔径大于所述第一尺寸孔径。在单独的将由所述过滤网构成的第一套筒结构套设在所述基管上后，由于基管管壁上的通孔的数量有限，导致所述过滤网上的部分面积不能够叠加在所述基管管壁上的通孔处，过滤效果较差。在所述基管与所述过滤网之间增设渗流网后，渗流网能够起到汇流作用，没有叠加在所述基管管壁通孔外侧的过滤网过滤的液体，会流向所述渗流网的第二尺寸的开孔，并流入所述基管的通孔内，从而增加所述防砂筛管的渗透率。
具体的，上述实施例中所述的防砂筛管，所述过滤网为金属丝编织密纹网，和/或所述渗流网为金属丝编织方孔网。
在具体生产过程中，上述实施例一中所述的防砂筛管中还包括：位于所述过滤部件两侧的连接环。所述过滤部件还包括过滤保护管，所述过滤
保护管的管壁上设置有冲缝。所述基管、所述过滤网、所述渗流网穿设在所述过滤保护管内，所述过滤保护管构成了所述基管的第二过滤层。所述连接环穿设在所述基管的两侧，所述连接环的内环与所述基管的外壁焊接固定，所述连接环的外环/侧壁与所述过滤保护管的两端焊接。由于过滤网的材质较易被破坏，所述过滤保护管用于保护所述过滤网。另外，所述过滤保护管与所述过滤网还能够起到分级过滤作用。所述连接环用于将过滤部件固定所述基管上。
为了便于安装，进一步的，如图2和图3所示，本发明的实施例一中所述的防砂筛管还提供如下的实施方式，其中所述基管1与所述过滤部件2之间设置有冲孔支撑管3。所述连接环包括分别位于所述过滤部件两侧的第一组连接环41以及第二组连接环42。所述第一组连接环41上设置有距所述基管1的管壁第一距离的第一组台阶面411、距所述基管1的管壁第二距离的第二组台阶面412，所述第二距离大于所述第一距离。所述第一组连接环41与所述基管1的管壁连接。所述过滤部件2渗流网22的两侧设置在所述第一组连接环41的第一组台阶面411上。所述过滤部件2的过滤网21的两侧设置在所述第一组连接环41的第二组台阶面上412。所述第二组连接环42上设置有距所述基管的管壁第三距离的第三组台阶面421，所述第三距离大于所述第二距离。所述第二组连接环42与所述基管1的管壁连接。所述过滤保护管5设置在所述第二组连接环42的第三组台阶面421上。所述第二组连接环42、所述过滤保护管5以及所述基管1围出容纳空间。所述冲孔支撑管3、所述第一过滤层、所述渗流网以及所述第一组连接环41位于所述容纳空间内。
在对所述防砂筛管进行组装过程中，由于基管的重量较大，在直接将所述过滤网、所述渗流网包裹并焊接在基管过程中，操作较为不便。由此，可先将过滤网、渗流网焊接在质量较小的冲孔支撑管上，然后再将冲孔支撑管套在基管上，便于组装过滤网、渗流网。在具体组装环节中，将所述过滤渗流网、过滤网依次缠绕在所述冲孔支撑管上。再将所述冲孔支撑管设置在所述基管的管壁外侧。将所述连接环设置为两组，将第一组连接环穿设在所述基管上，对压在所述冲孔支撑管的两侧，将所述渗流网两侧缠绕在所述第一组连接环的第一组台阶面上，将所述过滤网的两侧缠绕在所
述第一组连接环的第二组台阶面上。之后，再将所述过滤保护管穿设在所述基管外侧，将第二组连接环穿设在所述基管上，并对压在所述过滤保护管的两侧，并使所述过滤保护管设置在所述第二组连接环的第三组台阶面上。使所述冲孔支撑管、所述第一过滤层、所述渗流网以及所述第一组连接环位于由所述第二组连接环、所述过滤保护管以及所述基管围出容纳空间内。即完成了防砂筛管的组装。其中的固定方式可采用焊接连接。将连接环分为两部分，第一组连接环用于固定过滤网与渗流网，第二组连接环用于固定过滤保护管，相对于只是采用一对连接环设置在所述过滤保护管两侧，能够便于防砂筛管的组装，提高组装的效率。
其中，在将过滤网以及渗流网固定在所述冲孔支撑管上时，可采用焊接工艺，将过滤网以及渗流网焊接在冲孔支撑管上。所述冲孔支撑管上具有通孔，所述冲孔支撑管上设有用于焊接渗流网和过滤网的焊接区以及用于开设通孔的开孔区。将所述过滤网以及所述渗流网需要焊接的对接部分缠绕至所述冲孔支撑管的焊接区，然后进行焊接。
如图4所示，本发明实施例二提供了一种防砂筛管的制造方法，包括：
100、将具有第一尺寸孔径开孔的过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成具有一层所述过滤网的第一套筒结构，将所述第一套筒结构作为过滤部件的第一过滤层；
200、将所述过滤部件套设在基管上。
其中，在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边。
本发明实施例二提供的防砂筛管的制造方法制成的防砂筛管，在采用相同尺寸的基管情况下，不会降低防砂筛管的防砂性能，另外能够降低防砂筛管的管径，便于将减小管径的防砂筛管下入油气井眼内。
上述实施例的防砂筛管的制造方法中，“将具有第一尺寸孔径开孔的过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成具有一层所述过滤网的第一套筒结构”，具体焊接过程为：
第一种方式：将所述过滤网的第一侧边与所述过滤网的第二侧边对接，
之后将所述过滤网的第一侧边与所述过滤网的第二侧边进行焊接；
第二种方式：将所述过滤网的第一侧边与所述过滤网的第二侧边叠加，之后将所述过滤网的第一侧边与所述过滤网的第二侧边进行焊接。
进一步的，为了提高防砂筛管的渗透性能，如图5所示，上述防砂筛管的制造方法还包括：
300、将具有第二尺寸孔径开孔的渗流网卷成第二套筒结构，所述第二套筒结构作为所述过滤部件的渗流层；
将所述渗流层置于所述第一过滤层的内侧。
其中，所述第二尺寸孔径大于所述第一尺寸孔径。
为了对过滤层进行保护，上述防砂筛管的制造方法，所述过滤部件还包括：过滤保护管和冲孔支撑管；相应的，所述将所述过滤部件套设在基管上，具体为：
将所述渗流层和所述第一过滤层通过一次焊接工艺焊接在所述冲孔支撑管的外壁上；
将焊接有所述渗流层和所述第一过滤层的所述冲孔支撑管套设在所述基管上；
在所述第一过滤层的外侧套设所述过滤保护管；
其中，所述第一过滤层和所述过滤保护管之间具有预设距离。
所述预设距离为大于零的数值。在所述过滤保护管受到外力弯曲后，不会直接触碰到位于所述过滤保护管内的过滤网。
一次焊接工艺指的是在焊接过程中，同时把所述渗流层以及第一过滤层焊接在所述冲孔支撑管上。在将渗流层缠绕在所述冲孔支撑管上后，在对过滤网缠绕时，将过滤网需要焊接的区域与所述渗流层需要焊接的区域叠加，即可一次焊接完成。
在对所述防砂筛管进行组装过程中，上述防砂筛管的制造方法还包括：
在所述基管的沿轴线方向上的两侧穿设连接环，使连接环位于所述第一过滤层的两侧；
将所述连接环的内环与所述基管的外壁焊接固定，将所述连接环的外环/侧壁与所述过滤保护管的两端焊接。
在具体制造环节中，上述防砂筛管的制造方法，
在所述连接环的第一组连接环上机加工出距所述基管的管壁第一距离的第一组台阶面、距所述基管的管壁第二距离的第二组台阶面，所述第二距离大于所述第一距离；
将所述第一组连接环与所述基管的管壁焊接；
将所述过滤部件的渗流网的两侧缠绕在所述第一组连接环的第一组台阶面上；
将所述过滤部件的过滤网的两侧缠绕在所述第一组连接环的第二组台阶面上；
在所述连接环的第二组连接环上机加工出距所述基管的管壁第三距离的第三组台阶面，所述第三距离大于所述第二距离；
将所述第二组连接环与所述基管的管壁连接；
将所述过滤保护管的两侧设置在所述第二组连接环的第三组台阶面上，使所述第二组连接环、所述过滤保护管以及所述基管围出容纳空间，将所述冲孔支撑管、所述第一过滤层、所述渗流网以及所述第一组连接环位于所述容纳空间内。
其中，所述第一组台界面、所述第二组台阶面、所述第三组台阶面均为圆环面。
在将过滤网的两侧缠绕在所述第一组连接环的第二组台阶面上后，可在第二组台阶面的一周环上进行焊接，将过滤网的两侧焊接在第二组台阶面上。
在将过滤保护管的两侧设置在所述第二组连接环的第三组台阶面上后，可在第三组台阶面的一周环上进行焊接，将过滤保护管的两侧焊接在第三组台阶面上。
上述实施例中的“第一”、“第二”、“第三”等是用于区分各实施例，而并不代表各实施例的优劣。
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。
Claims (10)
- 一种防砂筛管，其特征在于，包括：基管，所述基管的管壁上设置有通孔；过滤部件，所述过滤部件包括一层过滤网，所述过滤网具有第一尺寸孔径的开孔，所述过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成第一套筒结构，所述第一套筒结构套设在所述基管的外侧构成了所述基管的第一过滤层；其中，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边；在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸。
- 根据权利要求1所述的防砂筛管，其特征在于，所述过滤部件包括一层渗流网，所述渗流网具有第二尺寸孔径的开孔，所述渗流网卷成第二套筒结构，所述第二套筒结构套设在所述基管外；其中，所述渗流网位于所述基管的外侧与所述过滤网之间，所述第二尺寸孔径大于所述第一尺寸孔径。
- 根据权利要求2所述的防砂筛管，其特征在于，所述过滤网为金属丝编织密纹网；和/或所述渗流网为金属丝编织方孔网。
- 根据权利要求2所述的防砂筛管，其特征在于，还包括：位于所述过滤部件两侧的连接环；所述过滤部件还包括过滤保护管，所述过滤保护管的管壁上设置有冲缝；所述基管、所述过滤网、所述渗流网穿设在所述过滤保护管内，所述过滤保护管构成了所述基管的第二过滤层；所述连接环穿设在所述基管的两侧，所述连接环的内环与所述基管的外壁焊接固定，所述连接环的外环/侧壁与所述过滤保护管的两端焊接。
- 根据权利要求4所述的防砂筛管，其特征在于，所述基管与所述过滤部件之间设置有冲孔支撑管；所述连接环包括分别位于所述过滤部件两侧的第一组连接环以及第二组连接环；所述第一组连接环上设置有距所述基管的管壁第一距离的第一组台阶面、距所述基管的管壁第二距离的第二组台阶面，所述第二距离大于所述第一距离；所述第一组连接环与所述基管的管壁连接；所述过滤部件的渗流网的两侧设置在所述第一组连接环的第一组台阶面上；所述过滤部件的过滤网的两侧设置在所述第一组连接环的第二组台阶面上；所述第二组连接环上设置有距所述基管的管壁第三距离的第三组台阶面，所述第三距离大于所述第二距离；所述第二组连接环与所述基管的管壁连接；所述过滤保护管设置在所述第二组连接环的第三组台阶面上；所述第二组连接环、所述过滤保护管以及所述基管围出容纳空间；所述冲孔支撑管、所述第一过滤层、所述渗流网以及所述第一组连接环位于所述容纳空间内。
- 一种防砂筛管的制造方法，其特征在于，包括：将具有第一尺寸孔径开孔的过滤网的第一侧边与所述过滤网的第二侧边通过焊接工艺焊接形成具有一层所述过滤网的第一套筒结构，将所述第一套筒结构作为过滤部件的第一过滤层；将所述过滤部件套设在基管上；其中，在所述第一套筒结构的焊接接缝处，由所述过滤网的第一侧边处的开孔与所述过滤网的第二侧边处的开孔焊接而成的开孔的孔径尺寸小于等于所述第一尺寸，所述过滤网的第一侧边为所述过滤网的第二侧边的相对侧边。
- 根据权利要求6所述的防砂筛管的制造方法，其特征在于，还包括：将具有第二尺寸孔径开孔的渗流网卷成第二套筒结构，所述第二套筒结构作为所述过滤部件的渗流层；将所述渗流层置于所述第一过滤层的内侧；其中，所述第二尺寸孔径大于所述第一尺寸孔径。
- 根据权利要求8所述的防砂筛管的制造方法，其特征在于，所述过滤部件还包括：过滤保护管和冲孔支撑管；相应的，所述将所述过滤部件套设在基管上，具体为：将所述渗流层和所述第一过滤层通过一次焊接工艺焊接在所述冲孔支撑管的外壁上；将焊接有所述渗流层和所述第一过滤层的所述冲孔支撑管套设在所述基管上；在所述第一过滤层的外侧套设所述过滤保护管；其中，所述第一过滤层和所述过滤保护管之间具有预设距离。
- 根据权利要求8所述的防砂筛管的制造方法，其特征在于，还包括：在所述基管的沿轴线方向上的两侧穿设连接环，使连接环位于所述第一过滤层的两侧；将所述连接环的内环与所述基管的外壁焊接固定，将所述连接环的外环/侧壁与所述过滤保护管的两端焊接。
- 根据权利要求9所述的防砂筛管的制造方法，其特征在于，在所述连接环的第一组连接环上机加工出距所述基管的管壁第一距离的第一组台阶面、距所述基管的管壁第二距离的第二组台阶面，所述第二距离大于所述第一距离；将所述第一组连接环与所述基管的管壁焊接；将所述过滤部件的渗流网的两侧缠绕在所述第一组连接环的第一组台阶面上；将所述过滤部件的过滤网的两侧缠绕在所述第一组连接环的第二组台阶面上；在所述连接环的第二组连接环上机加工出距所述基管的管壁第三距离的第三组台阶面，所述第三距离大于所述第二距离；将所述第二组连接环与所述基管的管壁连接；将所述过滤保护管的两侧设置在所述第二组连接环的第三组台阶面上，使所述第二组连接环、所述过滤保护管以及所述基管围出容纳空间， 将所述冲孔支撑管、所述第一过滤层、所述渗流网以及所述第一组连接环位于所述容纳空间内。
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