CN115680574A - Layered filling sand prevention tool - Google Patents
Layered filling sand prevention tool Download PDFInfo
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- CN115680574A CN115680574A CN202110860737.0A CN202110860737A CN115680574A CN 115680574 A CN115680574 A CN 115680574A CN 202110860737 A CN202110860737 A CN 202110860737A CN 115680574 A CN115680574 A CN 115680574A
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- central tube
- rubber cylinder
- sliding sleeve
- central pipe
- pipe
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- 239000004576 sand Substances 0.000 title claims abstract description 55
- 230000002265 prevention Effects 0.000 title claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 33
- 238000007906 compression Methods 0.000 claims abstract description 33
- 238000012856 packing Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 8
- 239000011229 interlayer Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a layered filling sand prevention tool, wherein an upper joint, an upper central pipe, an inner central pipe, a lower central pipe and a lower joint are fixedly connected through threads in sequence; an upper spring, an upper valve seat, a sliding sleeve, an upper valve core and a sealing sheath are arranged on the periphery of the upper central pipe; a sliding sleeve is arranged in the upper central pipe; the upper central tube and the sliding sleeve are fixed by shear pins; an expansion rubber cylinder assembly is arranged on the periphery of the inner central tube; the inner side of the inner central tube is provided with a limiting step, and a sliding sleeve arranged in the upper central tube can cut off the shear pin and move to the limiting step on the inner side of the inner central tube; the periphery of the lower central pipe is provided with a lower spring, a lower valve seat and a lower valve core; the upper central tube is provided with a radial filling port, the lower central tube is provided with a radial lower filling port, the inner central tube is provided with a liquid passing hole, the expansion rubber cylinder component moves upwards under the action of pressure difference to cut off the pin so as to compress the upper compression rubber cylinder, and moves downwards to compress the lower compression rubber cylinder. The gravel packing from two sections to multiple sections can be realized, the problem of uneven packing of each layer caused by interlayer difference is solved, and the sand prevention effect is improved.
Description
Technical Field
The invention belongs to the technical field of oil well production increasing measures, and particularly relates to a layered filling sand prevention tool.
Background
In loose sandstone reservoirs in eastern oil fields, most blocks face sand production problems of different degrees, development of the oil fields is greatly influenced, the sand production problem of long-section multilayer wells with interlayer spans larger than 50m is a common sand production form in production at present, mechanical or chemical cage integrated sand control technology is mainly adopted for the long-section multilayer wells at home and abroad, and for foreign mechanical multistage segmented filling sand control, the sand control effect is good, but the problems of high cost, complex pipe columns, large construction risk and difficult post-treatment exist; the chemical cage is used for integrated control, although the construction process is simple and convenient, the control difficulty of gravel filling at the main sand producing position is high, the integrity of the artificial well wall is poor, and the problem of short validity period exists. At present, the sand control countermeasures for the long-section multilayer well mainly adopt the sand control processes of layer cutting, combined prevention or layer selection, but all have certain defects, and the difficult problem of sand control of the long-section multilayer sand producing well mainly appears as follows:
(1) The well section is long, the mechanical sand prevention pipe column is long, and the pipe column is not easy to process after sand prevention failure and needs overhaul operation;
(2) The span is large, the layer number is many, and each layer rerum natura difference is big, and the interlayer heterogeneity is serious, leads to can't evenly pack sand to each layer when carrying out sand control measure, influences the long-term steady production of sand control well.
The method is researched aiming at the problem that the later-stage tubular column is difficult to process in the long-well-section multilayer well, the long-well-section sand control tubular column which is easy to process is researched, the problem that the later-stage mechanical sand control of the long-well-section well needs overhaul is solved, and the adaptability of mechanical sand control is further improved. However, the filling effect of the long-well-section multi-layer well is not considered too much, and because the long-well-section multi-layer well has large interlayer span, multiple layers, large difference of physical properties of each layer and serious interlayer heterogeneity, the uniform sand filling of each layer is influenced when sand prevention measures are carried out, and the long-acting stable production of the sand prevention well is influenced.
The layered filling process has wide application in fracturing measures, but the fracturing layered filling well section is relatively long, the construction pressure is relatively large, the packer has the problems of high cost, large construction risk and the like, so that the problem that a low-cost and low-risk layered tool suitable for sand prevention is needed to be researched to solve the problem that the filling effect of a long-well-section multilayer well is poor is particularly necessary, and the method has important significance for ensuring long-term stable production of the long-well-section multilayer well.
Disclosure of Invention
The invention aims to solve the technical problems that a layered filling sand prevention tool has the functions of no slips, prevention of creeping of a pipe column and prevention of sand blocking, can realize two-section to multi-section gravel filling, solves the problem of uneven filling of each layer due to interlayer difference, and further improves the sand prevention effect of a long well section sand prevention well.
In order to solve the technical problems, the invention adopts the technical scheme that: a layered filling sand prevention tool comprises an upper joint, an upper central pipe, an upper spring, an upper valve seat, shear pins, a sliding sleeve, an upper valve core, a sealing sheath, pins, an inner central pipe, an upper compression rubber cylinder, an expansion rubber cylinder assembly, a lower compression rubber cylinder, a lower central pipe, a lower spring, a lower valve seat, a lower filling port, a lower valve core and a lower joint;
the upper joint, the upper central pipe, the inner central pipe, the lower central pipe and the lower joint are fixedly connected through threads in sequence;
an upper spring, an upper valve seat, a sliding sleeve, an upper valve core and a sealing sheath are arranged on the periphery of the upper central pipe; a sliding sleeve is arranged in the upper central pipe; the upper central tube and the sliding sleeve are fixed by shear pins;
an expansion rubber cylinder assembly is arranged on the periphery of the inner central pipe, the expansion rubber cylinder assembly is fixed with the upper central pipe through a pin, and an upper compression rubber cylinder and a lower compression rubber cylinder are respectively arranged on the upper part and the lower part of the expansion rubber cylinder assembly; the inner side of the inner central tube is provided with a limiting step, and a sliding sleeve arranged in the upper central tube can cut off the shear pin and move to the limiting step on the inner side of the inner central tube;
the periphery of the lower central pipe is provided with a lower spring, a lower valve seat and a lower valve core;
the upper central tube is provided with a radial filling port, the lower central tube is provided with a radial lower filling port, the inner central tube is provided with a liquid passing hole, the expansion rubber cylinder component moves upwards under the action of pressure difference to cut off the pin so as to compress the upper compression rubber cylinder, and the expansion rubber cylinder component can move downwards under the action of pressure difference to compress the lower compression rubber cylinder.
The pins are copper pins.
The invention has the beneficial effects that: the long well section gravel packing sand control is realized, the layered packing sand control tool with the functions of no slip, prevention of pipe column creep and sand blocking is developed, the gravel packing from two sections to multiple sections can be realized, the problem of uneven packing of each layer caused by interlayer difference is solved, and the sand control effect of the long well section sand control well is further improved.
Drawings
FIG. 1 is a block diagram of a layered packing sand control tool of the present invention;
FIG. 2 is a schematic illustration of a partial configuration of a first section of a layered packing sand control tool of the present invention;
FIG. 3 is a schematic illustration of a second section of a layered packing sand control tool of the present invention in partial configuration;
FIG. 4 is a schematic representation of a packing superstructure of the layered packing sand control tool of the present invention;
FIG. 5 is a schematic structural view of the expansion cartridge assembly of the present invention;
in the figure, 1-upper joint, 2-upper central tube, 3-upper spring, 4-upper valve seat, 5-shear pin, 7-sliding sleeve, 8-upper valve core, 9-sealing sheath, 12-pin, 13-inner central tube, 14-upper compression rubber cylinder, 15-expansion rubber cylinder component, 16-lower compression rubber cylinder, 17-lower central tube, 18-lower spring, 19-lower valve seat, 20-lower filling port, 21-lower valve core and 22-lower joint.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is to be understood that the embodiments described are merely exemplary embodiments, rather than exemplary embodiments, and that all other embodiments may be devised by those skilled in the art without departing from the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", 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 element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-5, the layered packing sand control tool of the present invention comprises an upper joint 1, an upper central tube 2, an upper spring 3, an upper valve seat 4, a shear pin 5, a sliding sleeve 7, an upper valve core 8, a sealing sheath 9, a pin 12, an inner central tube 13, an upper compression rubber cylinder 14, an expansion rubber cylinder assembly 15, a lower compression rubber cylinder 16, a lower central tube 17, a lower spring 18, a lower valve seat 19, a lower packing port 20, a lower valve core 21, and a lower joint 22;
the upper joint 1, the upper central pipe 2, the inner central pipe 13, the lower central pipe 17 and the lower joint 22 are fixedly connected through threads in sequence;
an upper spring 3, an upper valve seat 4, a sliding sleeve 7, an upper valve core 8 and a sealing sheath 9 are arranged on the periphery of the upper central tube 2; a sliding sleeve 7 is arranged in the upper central tube 2; the upper central tube 2 and the sliding sleeve 7 are fixed by the shear pin 5;
an expansion rubber cylinder assembly 15 is arranged on the periphery of the inner central tube 13, the expansion rubber cylinder assembly 15 is fixed with the upper central tube 2 through a pin 12, and an upper compression rubber cylinder 14 and a lower compression rubber cylinder 16 are respectively arranged on the upper portion and the lower portion of the expansion rubber cylinder assembly 15; the inner side of the inner central tube 13 is provided with a limit step, and the shear pin 5 can be sheared by the sliding sleeve 7 arranged in the upper central tube 2 and moves to the limit step on the inner side of the inner central tube 13;
the periphery of the lower central tube 17 is provided with a lower spring 18, a lower valve seat 19 and a lower valve core 21;
the upper central tube 2 is provided with a radial filling port 6, the lower central tube 17 is provided with a radial lower filling port 20, the inner central tube 13 is provided with a liquid passing hole 11, the expansion rubber cylinder assembly 15 moves upwards under the action of pressure difference to cut the pin 12 and further compress the upper compression rubber cylinder 14, and the expansion rubber cylinder assembly 15 can move downwards under the action of pressure difference to compress the lower compression rubber cylinder 16.
Preferably, the pins 12 are copper pins.
The layered filling sand prevention tool provided by the invention comprises the following specific use steps:
(1) And (3) well descending: a lower joint 22 of a layered packing sand control tool is connected with a plug and is put into a preset well depth, and the layered packing sand control tool is positioned between an upper layer and a lower layer.
(2) Filling the lower layer: the ground is pressurized by a pump truck to carry the sand liquid, the sand liquid flows out from a lower filling port 20, a lower spring 18 compresses a lower valve seat 19 and a lower valve core 21, throttling pressure difference is generated between the inside and the outside of the layered filling sand control tool, the expansion rubber sleeve assembly 15 radially expands to be in contact with the wall of the sleeve for sealing under the action of the throttling pressure difference, and the piston effect of the layered filling sand control tool further pushes the expansion rubber sleeve assembly 15 to move upwards to cut the pin 12 and further compress the upper compression rubber sleeve 14 because the lower layer pressure is greater than the upper layer pressure. The upper compression packing element 14 seals against contact with the casing wall.
(3) Filling an upper layer: after the upper layer is filled, the ball is thrown and pressed to push the sliding sleeve 7 arranged in the upper central tube 2 to shear the shear pin 5 and move to the limit step at the inner side of the inner central tube 13. The sand-carrying liquid enters between the expansion rubber sleeve component 15 and the inner central tube 13 through a tolerance fit gap between the upper central tube 2 and the sliding sleeve 7 and the liquid passing hole 11, the expansion rubber sleeve component 15 seals the sleeve, the pressure of the annular space at the upper part of the expansion rubber sleeve component 15 is greater than that of the annular space at the lower part of the expansion rubber sleeve component 15, and the expansion rubber sleeve component 15 can move downwards under the action of pressure difference to compress the lower compression rubber sleeve 16.
The technical scheme adopted by the invention is as follows: a layered filling sand prevention tool comprises an upper joint 1, an upper central pipe 2, an upper spring 3, an upper valve seat 4, a shear pin 5, a sliding sleeve 7, an upper valve core 8, a sealing sheath 9, a pin 12, an inner central pipe 13, an upper compression rubber cylinder 14, an expansion rubber cylinder assembly 15, a lower compression rubber cylinder 16, a lower central pipe 17, a lower spring 18, a lower valve seat 19, a lower filling opening 20, a lower valve core 21 and a lower joint 22;
the upper joint 1, the upper central pipe 2, the inner central pipe 13, the lower central pipe 17 and the lower joint 22 are fixedly connected by threads;
an upper spring 3, an upper valve seat 4, a sliding sleeve 7, an upper valve core 8 and a sealing sheath 9 are arranged on the periphery of the upper central tube 2; a sliding sleeve 7 is arranged in the upper central tube 2; the upper central tube 2 and the sliding sleeve 7 are fixed by the shear pin 5;
an expansion rubber cylinder assembly 15 is arranged on the periphery of the inner central tube 13, the expansion rubber cylinder assembly 15 and the upper central tube 2 are fixed through a pin 12, and an upper compression rubber cylinder 14 and a lower compression rubber cylinder 16 are respectively arranged on the upper portion and the lower portion of the expansion rubber cylinder assembly 15;
the periphery of the lower central tube 17 is provided with a lower spring 18, a lower valve seat 19 and a lower valve core 21;
the upper central tube 2 is provided with a radial filling port 6, the lower central tube 17 is provided with a radial lower filling port 20, the inner central tube 13 is provided with a liquid passing hole 11, the expansion rubber cylinder assembly 15 can move upwards under the action of pressure difference to cut the pin 12 and further compress the upper compression rubber cylinder 14, and the expansion rubber cylinder assembly 15 can move downwards under the action of pressure difference to compress the lower compression rubber cylinder 16.
The inner side of the inner central tube 13 is provided with a limiting step, and the sliding sleeve 7 arranged in the upper central tube 2 can cut the shear pin 5 and move to the limiting step on the inner side of the inner central tube 13.
When the lower layer is filled, throttling pressure difference is generated inside and outside the layered filling sand control tool, the expansion rubber sleeve component 15 radially expands under the action of the throttling pressure difference to be in contact seal with the wall of the casing, and as the pressure of the lower layer is greater than that of the upper layer, the piston effect of the layered filling sand control tool further pushes the expansion rubber sleeve component 15 to move upwards to cut the pin 12 so as to compress the upper compression rubber sleeve 14. The upper compression packing 14 seals against the casing wall.
After the upper layer is filled, the ball is thrown and pressed to push the sliding sleeve 7 arranged in the upper central pipe 2 to cut off the shear pin 5 and move to the limit step at the inner side of the inner central pipe 13. The sand-carrying liquid enters between the expansion rubber sleeve component 15 and the inner central tube 13 through a tolerance fit gap between the upper central tube 2 and the sliding sleeve 7 and the liquid passing hole 11, the expansion rubber sleeve component 15 seals the sleeve, the pressure of the annular space at the upper part of the expansion rubber sleeve component 15 is greater than that of the annular space at the lower part of the expansion rubber sleeve component 15, the expansion rubber sleeve component 15 can move downwards under the action of pressure difference to compress the lower rubber sleeve 16, and then the lower layer is not interfered when the upper layer is filled.
In summary, the disclosure of the present invention is not limited to the above-mentioned embodiments, and persons skilled in the art can easily set forth other embodiments within the technical teaching of the present invention, but such embodiments are included in the scope of the present invention.
Claims (2)
1. The layered filling sand prevention tool is characterized by comprising an upper joint (1), an upper central pipe (2), an upper spring (3), an upper valve seat (4), shear pins (5), a sliding sleeve (7), an upper valve core (8), a sealing sheath (9), a pin (12), an inner central pipe (13), an upper compression rubber cylinder (14), an expansion rubber cylinder assembly (15), a lower compression rubber cylinder (16), a lower central pipe (17), a lower spring (18), a lower valve seat (19), a lower filling port (20), a lower valve core (21) and a lower joint (22);
the upper joint (1), the upper central pipe (2), the inner central pipe (13), the lower central pipe (17) and the lower joint (22) are fixedly connected through threads in sequence;
an upper spring (3), an upper valve seat (4), a sliding sleeve (7), an upper valve core (8) and a sealing sheath (9) are arranged on the periphery of the upper central tube (2); a sliding sleeve (7) is arranged in the upper central tube (2); the upper central pipe (2) and the sliding sleeve (7) are fixed by a shear pin (5);
an expansion rubber cylinder assembly (15) is arranged on the periphery of the inner central tube (13), the expansion rubber cylinder assembly (15) is fixed with the upper central tube (2) through a pin (12), and an upper compression rubber cylinder (14) and a lower compression rubber cylinder (16) are respectively arranged on the upper part and the lower part of the expansion rubber cylinder assembly (15); the inner side of the inner central tube (13) is provided with a limiting step, and a sliding sleeve (7) arranged in the upper central tube (2) can cut off the shear pin (5) and move to the limiting step on the inner side of the inner central tube (13);
a lower spring (18), a lower valve seat (19) and a lower valve core (21) are arranged on the periphery of the lower central tube (17);
the upper central tube (2) is provided with a radial filling port (6), the lower central tube (17) is provided with a radial lower filling port (20), the inner central tube (13) is provided with a liquid passing hole (11), the expansion rubber cylinder component (15) moves upwards under the action of pressure difference to cut the pin (12) and further compress the upper compression rubber cylinder (14), and the expansion rubber cylinder component (15) can move downwards under the action of pressure difference to compress the lower compression rubber cylinder (16).
2. The layered packing sand control tool of claim 1 wherein the pins (12) are copper pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110860737.0A CN115680574A (en) | 2021-07-28 | 2021-07-28 | Layered filling sand prevention tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110860737.0A CN115680574A (en) | 2021-07-28 | 2021-07-28 | Layered filling sand prevention tool |
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| Publication Number | Publication Date |
|---|---|
| CN115680574A true CN115680574A (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110860737.0A Pending CN115680574A (en) | 2021-07-28 | 2021-07-28 | Layered filling sand prevention tool |
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| CN (1) | CN115680574A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6364017B1 (en) * | 1999-02-23 | 2002-04-02 | Bj Services Company | Single trip perforate and gravel pack system |
| CN101435321A (en) * | 2008-12-26 | 2009-05-20 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Horizontal well tube exterior subsection gravel filling sand prevention process and pipe column |
| CN202937223U (en) * | 2012-12-11 | 2013-05-15 | 中国石油集团渤海钻探工程有限公司 | Combined sealing fracturing packer |
| CN203891848U (en) * | 2014-02-27 | 2014-10-22 | 孔利生 | Integrated extrusion sand control filling device |
| CN207598221U (en) * | 2017-11-10 | 2018-07-10 | 中国石油化工股份有限公司 | A kind of layering squeezes sand preventing tool |
| CN207863936U (en) * | 2018-01-22 | 2018-09-14 | 东营市瑞丰石油技术发展有限责任公司 | Multilayer huge discharge squeeze pack tool |
| CN110735619A (en) * | 2018-07-19 | 2020-01-31 | 中国石油化工股份有限公司 | Independent -layer extrusion filling pipe column in multiple oil layers |
-
2021
- 2021-07-28 CN CN202110860737.0A patent/CN115680574A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6364017B1 (en) * | 1999-02-23 | 2002-04-02 | Bj Services Company | Single trip perforate and gravel pack system |
| CN101435321A (en) * | 2008-12-26 | 2009-05-20 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Horizontal well tube exterior subsection gravel filling sand prevention process and pipe column |
| CN202937223U (en) * | 2012-12-11 | 2013-05-15 | 中国石油集团渤海钻探工程有限公司 | Combined sealing fracturing packer |
| CN203891848U (en) * | 2014-02-27 | 2014-10-22 | 孔利生 | Integrated extrusion sand control filling device |
| CN207598221U (en) * | 2017-11-10 | 2018-07-10 | 中国石油化工股份有限公司 | A kind of layering squeezes sand preventing tool |
| CN207863936U (en) * | 2018-01-22 | 2018-09-14 | 东营市瑞丰石油技术发展有限责任公司 | Multilayer huge discharge squeeze pack tool |
| CN110735619A (en) * | 2018-07-19 | 2020-01-31 | 中国石油化工股份有限公司 | Independent -layer extrusion filling pipe column in multiple oil layers |
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