阅读说明：本技术 一种易拔出井下防砂管柱的防砂井完井结构 (Sand control well completion structure with underground sand control pipe string easy to pull out ) 是由 李斌 张文杰 汪宁飞 于 2021-09-07 设计创作，主要内容包括：本发明属于石油开采技术领域,尤其为一种易拔出井下防砂管柱的防砂井完井结构,包括疏松砂岩地层、隔离体填充层和防砂管柱,所述疏松砂岩地层的内部开设有井口,井口的内部设置有防砂管柱,且所述防砂管柱的四周位于井口的内部设置有隔离体填充层,井口的上端设置有定位机构,且所述定位机构的上端设置有封隔机构,所述定位机构包括座圈、限位插筒和定位滑筒,所述座圈的底端固定连接有限位插筒,且所述限位插筒与井口的上端相互插合,所述限位插筒的内部设置有定位滑筒,本发明通过定位机构和封隔机构的设置,便于防砂管柱相对井口的下入以及拔出操作,且可对隔离体填充层的上部进行封隔保护,使用效果较佳。(The invention belongs to the technical field of oil exploitation, in particular to a sand control well completion structure with an easily pulled-out underground sand control pipe column, which comprises a unconsolidated sandstone stratum, an isolated body filling layer and a sand control pipe column, wherein a well head is arranged in the unconsolidated sandstone stratum, the sand control pipe column is arranged in the well head, the isolated body filling layer is arranged in the well head at the periphery of the sand control pipe column, a positioning mechanism is arranged at the upper end of the well head, a packing mechanism is arranged at the upper end of the well head, the positioning mechanism comprises a seat ring, a limiting insertion cylinder and a positioning sliding cylinder, the bottom end of the seat ring is fixedly connected with the limiting insertion cylinder, the limiting insertion cylinder is mutually inserted and combined with the upper end of the well head, and the positioning sliding cylinder is arranged in the limiting insertion cylinder. And the upper part of the isolation body filling layer can be sealed and protected, and the using effect is better.)

1. The utility model provides an easily extract sand control well completion structure of sand control tubular column in pit, includes unconsolidated sandstone stratum (26), isolator filling layer (27) and sand control tubular column (28), its characterized in that: a wellhead is arranged in the unconsolidated sandstone stratum (26), a sand control pipe column (28) is arranged in the wellhead, an isolated body filling layer (27) is arranged in the wellhead at the periphery of the sand control pipe column (28), a positioning mechanism (1) is arranged at the upper end of the wellhead, a packing mechanism (9) is arranged at the upper end of the positioning mechanism (1), the positioning mechanism (1) comprises a seat ring (2), a limiting insertion cylinder (6) and a positioning sliding cylinder (8), the bottom end of the seat ring (2) is fixedly connected with the limiting insertion cylinder (6), the limiting insertion cylinder (6) and the upper end of the wellhead are mutually inserted and combined, the positioning sliding cylinder (8) is arranged in the limiting insertion cylinder (6), an upper scraping ring (14) is fixedly connected at the upper end of the positioning sliding cylinder (8), a lower scraping ring (15) is fixed at the bottom end of the positioning sliding cylinder (8), and reinforcing scraping heads (23) are fixedly connected at the end parts of the upper scraping ring (14) and the lower scraping ring (15), a plurality of rolling groove (16) have been seted up all around to the inside of location slide cartridge (8), the inside swing joint of rolling groove (16) has ball (17), and adjacent from top to bottom oil pipe (18) have been seted up between rolling groove (16), a plurality of oiling pipe (19) have been seted up all around to the inside upper end of location slide cartridge (8), just oiling pipe (19) communicate with each other with oil pipe (18) are inside, packing is separated mechanism (9) and is included shutoff ring (10) and shutoff ring (12), the bottom mounting of shutoff ring (10) has shutoff ring (12), just shutoff ring (12) block in the space between seat circle (2) and location slide cartridge (8).

2. The sand control well completion structure with the easily pulled-out downhole sand control string as claimed in claim 1, wherein: handle (3) under the equal fixedly connected with in both ends about the both sides intermediate position of seat circle (2), just spacing shrinkage pool (24) have been seted up to handle (3) one side upper end down, handle (11) are gone up to the equal fixedly connected with in both ends about the both sides intermediate position of shutoff circle (10), just go up spacing calorie of axle (25) of one side bottom fixedly connected with of handle (11), spacing shrinkage pool (24) and spacing calorie of axle (25) block each other.

3. The sand control well completion structure with the easily pulled-out downhole sand control string as claimed in claim 1, wherein: the bottom end of the seat ring (2) is fixedly connected with a plurality of limiting inserting strips (4), and the limiting inserting strips (4) are of conical structures and are mutually inserted into the unconsolidated sandstone stratum (26).

4. The sand control well completion structure with the easily pulled-out downhole sand control string as claimed in claim 3, wherein: the bottom of seat circle (2) and the upper end of loose sandstone stratum (26) are laminated each other, the inside fixedly connected with shock-absorbing gasket (5) in upper end of seat circle (2) and shock-absorbing gasket (5) are the rubber component, the bottom of shutoff circle (10) and the upper end of seat circle (2) are laminated each other, just the bottom face and the shock-absorbing gasket (5) elastic contact of shutoff circle (10).

5. The sand control well completion structure with the easily pulled-out downhole sand control string as claimed in claim 1, wherein: a plurality of connecting rods (7) are arranged between the limiting insertion barrel (6) and the positioning sliding barrel (8), and two ends of each connecting rod (7) are fixedly connected with the inner wall of the limiting insertion barrel (6) and the outer wall of the positioning sliding barrel (8) respectively.

6. The sand control well completion structure with the easily pulled-out downhole sand control string as claimed in claim 1, wherein: the sections of the upper scraping ring (14), the lower scraping ring (15) and the reinforced scraping head (23) are all triangular structures, and the reinforced scraping head (23) is a manganese steel component.

7. The sand control well completion structure with the easily pulled-out downhole sand control string as claimed in claim 1, wherein: the upper end outer wall of location slide cartridge (8) is fixedly connected with a plurality of connecting strip (20) all around, one side fixedly connected with shutoff piece (21) of connecting strip (20), the bottom fixedly connected with shutoff stopper (22) of shutoff piece (21), just the upper end of shutoff stopper (22) and notes oil pipe (19) gomphosis each other.

8. The sand control well completion structure capable of easily pulling out the downhole sand control string according to claim 7, wherein: the connecting strip (20) and the plugging plug (22)) are rubber components.

9. The sand control well completion structure with the easily pulled-out downhole sand control string as claimed in claim 1, wherein: the upper end of the plugging ring (10) is fixedly connected with a reinforcing rib ring (13), and the inner wall of the reinforcing rib ring (13) is attached to the outer wall of the positioning sliding cylinder (8).

Technical Field

The invention belongs to the technical field of oil exploitation, and particularly relates to a sand control well completion structure with an easily pulled-out underground sand control pipe column.

Background

The loose sandstone oil reservoir that has a large amount of easy productions in global oil and gas field to the oil and gas well of loose sandstone oil reservoir, no matter be the vertical well, inclined shaft or horizontal well, the oil well sand production is one of the problem that oil field development often meets, therefore, it is very important to prevent that the underground formation from producing sand, and at present, the mechanical sand control technique that oil and gas well is commonly used has two kinds: the sand control pipe column is put into the oil-gas well for sand control, gravel is filled in the annular space between the sand control pipe column and the well wall, the gravel layer is utilized to prevent formation sand from entering the shaft, and when the pipe drawing operation is carried out, the formation sand or gravel and the sand control pipe column tightly clasped with the formation sand or gravel can generate huge friction resistance, so that the sand control pipe is difficult to be drawn out, and the operation is inconvenient.

In the prior art, the chinese patent publication No. CN201320799528.0 discloses a completion structure of sand control well with easy pull-out of downhole sand control pipe, which establishes a permeable spacer, which generates low resistance to pipe when lifting pipe, in the annulus between the well wall and sand control pipe, and is referred to as permeable low resistance spacer for short.

However, the sand control well completion structure with the easily pulled-out downhole sand control string in the prior art has the following defects in the use process: firstly, the sand control pipe column and the well mouth lack better positioning, which is not beneficial to the middle putting in and pulling out of the sand control pipe column relative to the well mouth, the sand control pipe column in the well mouth is easy to deflect, further causing the uneven filling layer thickness of the spacer for filling the periphery of the sand control pipe column, thereby influencing the stable pulling out of the sand control pipe column, secondly, when the pipe pulling operation is carried out, the spacer particles in the spacer filling layer are also adhered and taken out around the outer wall of the sand control pipe column in the well mouth, the cleaning and the cleaning of the spacer particles around the outer wall of the sand control pipe column are not easy, which brings inconvenience for the subsequent maintenance and the next use of the sand control pipe column, moreover, the upper end sealing and separating effect of the spacer filling layer after filling is not good, the upper part of the spacer filling layer lacks better protection, the external flying sand is easy to enter the spacer filling layer from the upper part of the spacer filling layer, and is mixed with the spacer particles filled in the spacer filling layer, adding difficulty to the repeated screening use of the spacer particles in the spacer-filled layer.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the sand control well completion structure with the underground sand control pipe string easy to pull out, and the structure has the characteristics of simple positioning, convenient wall scraping and quick packing.

In order to achieve the purpose, the invention provides the following technical scheme: a sand control well completion structure with an easily pulled-out underground sand control pipe column comprises a unconsolidated sandstone stratum, an isolation body filling layer and a sand control pipe column, wherein a well mouth is formed in the unconsolidated sandstone stratum, the sand control pipe column is arranged in the well mouth, the isolation body filling layer is arranged in the well mouth at the periphery of the sand control pipe column, a positioning mechanism is arranged at the upper end of the well mouth, a packing mechanism is arranged at the upper end of the positioning mechanism, the positioning mechanism comprises a seat ring, a limiting insertion cylinder and a positioning sliding cylinder, a limiting insertion cylinder is fixedly connected to the bottom end of the seat ring, the limiting insertion cylinder and the upper end of the well mouth are mutually inserted and combined, a positioning sliding cylinder is arranged in the limiting insertion cylinder, an upper scraping ring is fixedly connected to the upper end of the positioning sliding cylinder, a lower scraping ring is fixed to the bottom end of the positioning sliding cylinder, and reinforcing scraping heads are fixedly connected to the end parts of the upper scraping ring and the lower scraping ring, the inside of location slide cartridge has seted up a plurality of slot rolling all around, the inside swing joint in slot rolling has the ball, and adjacent from top to bottom seted up oil pipe between the slot rolling, a plurality of oiling pipe has been seted up all around to the inside of upper end of location slide cartridge, just oiling pipe communicates with each other with oil pipe is inside, it includes shutoff ring and shutoff ring to seal apart the mechanism, the bottom mounting of shutoff ring has the shutoff ring, just the shutoff ring card is in the space between seat circle and location slide cartridge.

According to the preferable technical scheme of the sand control well completion structure with the easily pulled-out underground sand control tubular column, the left end and the right end of the middle positions of the two sides of the seat ring are fixedly connected with the lower handles, the upper ends of one sides of the lower handles are provided with the limiting concave holes, the left end and the right end of the middle positions of the two sides of the plugging ring are fixedly connected with the upper handles, the bottom ends of one sides of the upper handles are fixedly connected with the limiting clamping shafts, and the limiting concave holes are mutually clamped with the limiting clamping shafts.

According to the preferable technical scheme of the sand control well completion structure with the easily pulled-out underground sand control tubular column, the bottom end of the seat ring is fixedly connected with a plurality of limiting inserting strips, and the limiting inserting strips are of conical structures and are mutually inserted and combined with loose sandstone strata.

According to the preferable technical scheme of the sand control well completion structure with the easily pulled-out underground sand control tubular column, the bottom end of the seat ring is mutually attached to the upper end of the unconsolidated sandstone stratum, the damping washer is fixedly connected to the inner part of the upper end of the seat ring and is a rubber component, the bottom end of the plugging ring is mutually attached to the upper end of the seat ring, and the bottom end surface of the plugging ring is in elastic contact with the damping washer.

As the preferable technical scheme of the sand control well completion structure with the easily pulled-out underground sand control tubular column, a plurality of connecting rods are arranged between the limiting insertion barrel and the positioning sliding barrel, and two ends of each connecting rod are respectively fixedly connected with the inner wall of the limiting insertion barrel and the outer wall of the positioning sliding barrel.

As the preferable technical scheme of the sand control well completion structure with the easily pulled-out underground sand control tubular column, the sections of the upper scraping ring, the lower scraping ring and the reinforcing scraping head are all triangular structures, and the reinforcing scraping head is a manganese steel component.

According to the preferable technical scheme of the sand control well completion structure with the easily pulled-out underground sand control tubular column, a plurality of connecting strips are fixedly connected to the periphery of the outer wall of the upper end of the positioning sliding cylinder, one side of each connecting strip is fixedly connected with a plugging block, the bottom end of each plugging block is fixedly connected with a plugging block, and the plugging blocks are mutually embedded with the upper end of the oil injection pipe.

As the preferable technical scheme of the sand control well completion structure with the easily pulled-out underground sand control pipe column, the connecting strip and the plugging plug are rubber components.

According to the preferable technical scheme of the sand control well completion structure with the easily pulled-out underground sand control tubular column, the upper end of the plugging ring is fixedly connected with the reinforcing rib ring, and the inner wall of the reinforcing rib ring is attached to the outer wall of the positioning sliding cylinder.

Compared with the prior art, the invention has the beneficial effects that:

1. when the device is used, the positioning mechanism and the packing mechanism which are connected together are placed above a well mouth in a centered mode, the limiting insertion cylinder in the positioning mechanism is inserted into the upper end of the well mouth in the centered mode to limit, so that the positioning mechanism and the packing mechanism are installed relative to the well mouth, then the sand control pipe column is inserted into the well mouth in the centered mode and is lowered to a preset position, in the process of lowering the sand control pipe column, the positioning sliding cylinder in the positioning mechanism is convenient for lowering the sand control pipe column in the centered mode, the sand control pipe column in the well mouth is not prone to deflection, and similarly, when pipe pulling operation is conducted, the positioning sliding cylinder in the positioning mechanism is convenient for stably pulling up the sand control pipe column.

2. When the device is used, the upper scraping ring at the upper end of the positioning sliding cylinder can scrape off the ash stains adhered to the periphery of the outer wall of the sand control pipe column in the running-in process, so that the outer wall of the sand control pipe column is ensured to be flat and smooth, the sand control pipe column can be conveniently and smoothly run in and the sand control pipe column can be conveniently and subsequently drawn out, the lower scraping ring at the bottom end of the positioning sliding cylinder can scrape off the separator particles adhered to the periphery of the outer wall of the sand control pipe column in the running-in process, the separator particles in a separator filling layer are prevented from being adhered to the sand control pipe column to be taken out, unnecessary cleaning time is removed, and the subsequent maintenance and use of the sand control pipe column are convenient.

3. When the anti-sand device is used, the smooth movement of the anti-sand pipe column relative to the positioning sliding barrel is facilitated through the rolling balls in the lower scraping ring, so that the anti-sand pipe column can be smoothly inserted and pulled out, and lubricating liquid can be injected into the rolling groove through the oil pipe and the oil injection pipe which are communicated with the lower scraping ring, so that the rolling balls in the lower scraping ring can roll in a low-abrasion mode, the use effect of the rolling balls is improved, and the service life of the rolling balls is prolonged.

4. When the packing mechanism is used, the packing mechanism is lifted up relative to the positioning mechanism, so that the packing ring in the packing mechanism is separated from the positioning mechanism, then, the isolating body particles can be filled into a well mouth through the gap between the seat ring and the positioning sliding barrel in the positioning mechanism to form an isolating body filling layer, then, the packing mechanism falls down relative to the positioning mechanism, so that the packing ring is vertically attached to the seat ring, and the packing ring is used for packing the gap between the seat ring and the positioning sliding barrel, so that the better packing of the upper part of the isolating body filling layer is completed, the upper part of the isolating body filling layer is conveniently packed and protected, and external flying sand is not easy to enter the isolating body filling layer from the upper part of the isolating body filling layer.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic view of a local connection section structure of the positioning slide cartridge and the sand control tubular column of the present invention;

FIG. 4 is an enlarged view of the structure at B of FIG. 1;

FIG. 5 is a schematic cross-sectional view of the connection state of the positioning mechanism and the packing mechanism according to the present invention;

FIG. 6 is a schematic view of the connection state of the positioning mechanism and the packing mechanism according to the present invention;

FIG. 7 is a schematic cross-sectional view of the positioning mechanism and the packing mechanism of the present invention in a separated state;

FIG. 8 is a schematic structural view of the positioning mechanism and the packing mechanism of the present invention in a separated state;

FIG. 9 is a schematic top view of the positioning mechanism of the present invention;

FIG. 10 is a bottom view of the positioning mechanism of the present invention;

FIG. 11 is a schematic top view of the packing mechanism of the present invention;

FIG. 12 is a schematic bottom view of the packing mechanism of the present invention.

In the figure: 1. a positioning mechanism; 2. a seat ring; 3. a lower grip; 4. limiting the cutting; 5. a cushion ring; 6. limiting the inserting cylinder; 7. a connecting rod; 8. positioning a sliding cylinder; 9. a packing mechanism; 10. plugging rings; 11. an upper grip; 12. a plugging ring; 13. a reinforcing rib ring; 14. an upper scraping ring; 15. a scraping ring is arranged; 16. rolling a groove; 17. a ball bearing; 18. an oil pipe is communicated; 19. an oil filling pipe; 20. a connecting strip; 21. a plugging block; 22. blocking; 23. reinforcing the scraping head; 24. limiting concave holes; 25. limiting the shaft; 26. unconsolidated sandstone formations; 27. an isolator filling layer; 28. the sand control tubular column.

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.

Examples

Referring to fig. 1-12, the present invention provides the following technical solutions: a sand control well completion structure capable of easily pulling out an underground sand control pipe column comprises a loose sandstone stratum 26, an isolation body filling layer 27 and a sand control pipe column 28, wherein a well mouth is formed in the loose sandstone stratum 26, the sand control pipe column 28 is arranged in the well mouth, and the isolation body filling layer 27 is arranged in the well mouth at the periphery of the sand control pipe column 28, wherein the loose sandstone stratum 26, the isolation body filling layer 27 and the sand control pipe column 28 are all in the prior art, please refer to the sand control well completion structure capable of easily pulling out the underground sand control pipe column disclosed in the Chinese patent with the publication number of CN201320799528.0, and detailed description is omitted here.

Referring to fig. 1, 2, 3, 5, 6, 7, 8, 9 and 10, a positioning mechanism 1 is arranged at the upper end of a well head, the positioning mechanism 1 comprises a seat ring 2, a limiting insert cylinder 6 and a positioning slide cylinder 8, the bottom end of the seat ring 2 is fixedly connected with the limiting insert cylinder 6, the limiting insert cylinder 6 is mutually inserted with the upper end of the well head, the positioning slide cylinder 8 is arranged inside the limiting insert cylinder 6, a plurality of limiting inserts 4 are fixedly connected with the bottom end of the seat ring 2, the limiting inserts 4 are of conical structures and are mutually inserted with a unconsolidated sandstone stratum 26, the bottom end of the seat ring 2 is mutually attached with the upper end of the unconsolidated sandstone stratum 26, a damping gasket 5 is fixedly connected inside the upper end of the seat ring 2, the bottom end of the plugging ring 10 is mutually attached with the upper end of the seat ring 2, the bottom end surface of the plugging ring 10 is in elastic contact with the damping gasket 5, a plurality of connecting rods 7 are arranged between the limiting insert cylinder 6 and the positioning slide cylinder 8, and both ends of the connecting rod 7 are fixedly connected with the inner wall of the limit insert cylinder 6 and the outer wall of the positioning slide cylinder 8 respectively, when in use, the positioning mechanism 1 and the packing mechanism 9 which are connected together are placed above a well head in the center, so that the limit insert cylinder 6 in the positioning mechanism 1 is inserted into the upper end of the well head in the center for limiting, thereby completing the installation of the positioning mechanism 1 and the packing mechanism 9 relative to the well head, then the sand control pipe column 28 is inserted into the well head in the center and is put into a preset position, in the process of putting in the sand control pipe column 28, the center of the sand control pipe column 28 is convenient to put in through the positioning slide cylinder 8 in the positioning mechanism 1, the sand control pipe column 28 in the well head is not easy to deflect, and in the same way, when in the pipe drawing operation, the positioning slide cylinder 8 in the positioning mechanism 1 is convenient to stably pull up the sand control pipe column 28, wherein, the limit insert strip 4 is used for reinforcing the seat ring 2 relatively loose sandstone stratum 26, the positioning mechanism 1 is prevented from rotating and moving, and the damping washer 5 is used for damping and reducing the abrasion of the sealing ring 10 relative to the seat ring 2 after falling.

Referring to fig. 1, 2, 3, 5, 7, 9 and 10, an upper scraping ring 14 is fixedly connected to the upper end of a positioning sliding cylinder 8, a lower scraping ring 15 is fixed to the bottom end of the positioning sliding cylinder 8, the end portions of the upper scraping ring 14 and the lower scraping ring 15 are fixedly connected with a reinforcing scraping head 23, the sections of the upper scraping ring 14, the lower scraping ring 15 and the reinforcing scraping head 23 are all triangular structures, and the reinforcing scraping head 23 is a manganese steel member, when in use, through the upper scraping ring 14 at the upper end of the positioning sliding cylinder 8, dust stains adhered to the periphery of the outer wall of the sand control pipe column 28 in the process of being pulled down can be scraped, the outer wall of the sand control pipe column 28 is ensured to be smooth and smooth, the sand control pipe column 28 can be conveniently and smoothly pulled down and the sand control pipe column 28 can be conveniently pulled out, through the lower scraping ring 15 at the bottom end of the positioning sliding cylinder 8, the separator particles adhered to the periphery of the outer wall of the sand control pipe column 28 in the process of the upward pulling up can be scraped, and the separator filling layer 27 can be prevented from being adhered to be taken out by the pipe column 28, get rid of unnecessary clearance clean time to the subsequent maintenance and the use of sand control tubular column 28, and, have the last scraping ring 14 of strengthening scraping head 23 and scrape ring 15 durable down, non-deformable damages strikes off the effect better.

Referring to fig. 1, 2, 3, 5, 7, 9 and 10, a plurality of rolling grooves 16 are formed in the periphery of the positioning slide cylinder 8, balls 17 are movably connected in the rolling grooves 16, oil pipes 18 are formed between the upper adjacent rolling grooves 16 and the lower adjacent rolling grooves, a plurality of oil injection pipes 19 are formed in the periphery of the upper end of the positioning slide cylinder 8, the oil injection pipes 19 are communicated with the oil pipes 18, a plurality of connecting strips 20 are fixedly connected to the periphery of the outer wall of the upper end of the positioning slide cylinder 8, a plugging block 21 is fixedly connected to one side of each connecting strip 20, a plugging plug 22 is fixedly connected to the bottom end of each plugging block 21, the plugging plugs 22 are mutually embedded with the upper ends of the oil injection pipes 19, the connecting strips 20 and the plugging plugs 22 are rubber components, and when the sand control pipe string 28 is used, smooth movement relative to the positioning slide cylinder 8 is facilitated through the balls 17 rolling in the lower scraping ring 15, so that the sand control pipe string 28 can be smoothly inserted and extracted, and, through leading to oil pipe 18 and oiling pipe 19 communicating with scraping ring 15 down, can inject lubricated liquid into rolling groove 16, so that scrape the low wearing and tearing roll of interior ball 17 of ring 15 down, improve the result of use of ball 17, prolong the life of ball 17, wherein, connecting strip 20 is used for being connected between shutoff piece 21 and the location slide cartridge 8, make shutoff piece 21 and shutoff piece 22 difficult for dropping the loss after pulling out, shutoff piece 21 and shutoff piece 22 are used for the packing of oiling pipe 19 to seal, prevent oiling pipe 19 and rolling groove 16 and lead to oil pipe 18 and advance dirt and add dirt and deposit.

Referring to fig. 1, 2, 5, 6, 7, 8, 11 and 12, a packing mechanism 9 is arranged at the upper end of a positioning mechanism 1, the packing mechanism 9 comprises a packing ring 10 and a packing ring 12, the packing ring 12 is fixed at the bottom end of the packing ring 10, the packing ring 12 is clamped in a gap between a seat ring 2 and a positioning slide cylinder 8, a reinforcing rib ring 13 is fixedly connected at the upper end of the packing ring 10, and the inner wall of the reinforcing rib ring 13 is attached to the outer wall of the positioning slide cylinder 8, when in use, the packing mechanism 9 is lifted relative to the positioning mechanism 1, so that the packing ring 10 in the packing mechanism 9 is separated from the positioning mechanism 1, the packing ring 12 in the packing mechanism 9 is separated from the positioning mechanism 1, then particles can be filled into a well mouth through the gap between the seat ring 2 and the positioning slide cylinder 8 in the positioning mechanism 1 to form an isolating body filling layer 27, and then the packing mechanism 9 falls relative to the positioning mechanism 1, make shutoff ring 10 and seat circle 2 laminating from top to bottom to make shutoff ring 12 carry out the shutoff to the space between seat circle 2 and the smooth section of thick bamboo 8 of location, thereby accomplish the preferred packing on isolator filling layer 27 upper portion, the protection of being convenient for packing on isolator filling layer 27 upper portion, outside flies to sand is difficult for getting into the isolator filling layer 27 from the upper portion of isolator filling layer 27 in, wherein, the rib ring 13 that strengthens is used for shutoff ring 10 to the reinforcing support around the smooth section of thick bamboo 8 upper portion of location, increase the support area, improve and support intensity.

Referring to fig. 1, 4, 5, 6, 7, 8, 9, 10, 11 and 12, the left and right ends of the middle position of the two sides of the seat ring 2 are fixedly connected with the lower handle 3, the upper end of one side of the lower handle 3 is provided with a limit concave hole 24, the left and right ends of the middle position of the two sides of the plugging ring 10 are fixedly connected with the upper handle 11, the bottom end of one side of the upper handle 11 is fixedly connected with a limit clamp shaft 25, the limit concave hole 24 and the limit clamp shaft 25 are mutually clamped, when in use, the positioning mechanism 1 and the packing mechanism 9 can be conveniently lifted relative to the well mouth through the connected lower handle 3 and upper handle 11, the packing mechanism 9 can be conveniently lifted relative to the positioning mechanism 1 through the upper handle 11 separated from the lower handle 3, and the packing mechanism 9 can be connected with the positioning mechanism 1 through the connected lower handle 3 and upper handle 11, so that the positioning mechanism 1 on the positioning mechanism 1 is not easy to rotate, to facilitate stable use of the packing mechanism 9.

The invention has the following use flow and working principle: when the invention is used, the positioning mechanism 1 and the packing mechanism 9 which are mutually connected are carried to the upper part of a well mouth through the lower grip 3 and the upper grip 11, the limit insert cylinder 6 is inserted into the well mouth in a downward embedding way, and is inserted into the unconsolidated sandstone stratum 26 through the limit insert 4 for reinforcement, thereby completing the installation of the positioning mechanism 1 and the packing mechanism 9 relative to the well mouth, then the sand control pipe column 28 is put into the relative positioning slide cylinder 8 and the well mouth, in the process of putting the sand control pipe column 28 into the well mouth, the ash stains adhered to the periphery of the outer wall of the sand control pipe column 28 in the putting process can be scraped through the upper scraping ring 14 and the reinforcing scraping head 23 at the end part of the upper scraping ring 14, in addition, the smooth putting of the pipe column 28 relative to the positioning mechanism 1 is facilitated through the rolling balls 17 which roll in the rolling groove 16, after the pipe column 28 is put into the well mouth to a preset position, the upper grip 11 is used for lifting the packing ring 10 relative to the seat ring 2, the plugging ring 10 is separated from the seat ring 2, then the gap between the seat ring 2 and the positioning sliding cylinder 8 is filled with the spacer particles to form a spacer filling layer 27, after the spacer particles are filled, the plugging ring 10 is dropped relative to the seat ring 2, the plugging ring 12 is clamped in the gap between the seat ring 2 and the positioning sliding cylinder 8, the upper part of the spacer filling layer 27 after being filled is plugged and sealed, and is downwards clamped in the limiting concave hole 24 at the upper end of the lower handle 3 through the limiting clamping shaft 25 at the bottom end of the upper handle 11, the seat ring 2 at the upper end of the positioning mechanism 1 is limited, so that the positioning mechanism 1 and the sand control seat ring 2 are connected together and are not easy to rotate, when the pipe drawing operation is carried out, the spacer filling layer 27 formed by filling the spacer particles is positioned between the pipe column 28 and the positioning mechanism 1 in the well, the upward drawing and taking out of the sand control pipe column 28 are convenient, and simultaneously, scrape the head 23 through the lower scraping ring 15 of the 8 bottoms of location slide cartridge and the enhancement of the 15 tip of lower scraping ring and can strike off the isolator granule of sand control tubular column 28 outer wall adhesive tape all around, prevent that the isolator granule is taken off by sand control tubular column 28 adhesion in the isolator filling layer 27.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. 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.