CN112502675B

CN112502675B - Forward filling tool

Info

Publication number: CN112502675B
Application number: CN202110173268.5A
Authority: CN
Inventors: 王景洲
Original assignee: Shandong Goldman Sachs Petroleum Technology Co ltd
Current assignee: Shandong Goldman Sachs Petroleum Technology Co.,Ltd.
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-06-11
Anticipated expiration: 2041-02-09
Also published as: CN112502675A

Abstract

The invention provides a forward filling tool, and relates to the technical field of sand prevention filling of oil fields. This forward filling instrument, including the outer tube, the inside of outer tube is provided with interior sleeve pipe, interior sheathed tube middle part is provided with the flushing pipe, the outside right side of outer tube is provided with the pressure boost pipe, the bottom fixed connection of outer tube is on the top of guide shoe, the outer equidistant outer through-hole equidistance of a plurality of outer through-holes of group and every group that is provided with of outer through-hole of group is provided with a plurality of and distributes around the outer tube on the outer tube. Inject pressurized air into annular cylinder through the pressure boost pipe and fix the fixed jack-up of following of annular for interior through-hole and outer through-hole misplace from top to bottom and seal, at this moment wash out interior sheathed tube top mouth of pipe through the backwash of mortar impurity in the wash pipe sleeve pipe and collect the processing again, ensure that the washing liquid of washing out can not influence the geological stratification of well bore inside and the mortar after filling, and the space is sufficient between wash pipe and the interior sleeve pipe, can not block the mortar that the post washed, be worth wideling popularize.

Description

Forward filling tool

Technical Field

The invention relates to the technical field of sand prevention filling in oil fields, in particular to a forward filling tool.

Background

The sand production of the oil well is one of the common problems in the process of exploiting the unconsolidated sandstone reservoir, and refers to a process or a phenomenon that the rock stratum structure of a zone near the bottom of the well is damaged due to comprehensive factors such as exploitation and operation of the oil well, so that part of dropped formation sand flows into a shaft along with oil reservoir fluid, and a series of adverse effects are caused on the normal production of the oil well, the sand production causes a series of hazards such as sand burying of the oil reservoir, shaft sand blocking, equipment abrasion sand blocking, shaft wall collapse, casing damage and the like, the crude oil production cost is improved, the oil field management difficulty is increased, the continuous sand production of the oil well can finally cause the production stop of the oil well and even discard, and therefore the sand production well.

At present, most of oil field sand control filling tools are used for pumping well-flushing liquid from a sleeve after the annular control filling is finished, the well-flushing hole enters an outer cylinder and a central pipe annulus, residual redundant mortar in an oil pipe is sucked into a well through the annular filling, so that excessive cleaning liquid is absorbed by the mortar filled in the well and a geological layer, the geology in the well hole is softened due to excessive moisture, the filled mortar is difficult to solidify and form, the gap between the outer cylinder of the well-flushing hole and the central pipe annulus is narrow, and the well-flushing hole is easily blocked by the mortar.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a forward filling tool, and solves the problems that the residual mortar in the cleaning filling tool is unreasonably discharged and a well washing hole is easily blocked by the mortar.

In order to achieve the purpose, the invention is realized by the following technical scheme: the positive filling tool comprises an outer sleeve, an inner sleeve is arranged inside the outer sleeve, a flushing pipe is arranged in the middle of the inner sleeve, a pressurizing pipe is arranged on the right side of the outer sleeve, the bottom end of the outer sleeve is fixedly connected to the top end of an introduction shoe, a plurality of groups of outer through holes are equidistantly arranged on the outer sleeve, the outer through holes are distributed around the outer sleeve, a plurality of groups of inner through holes are equidistantly arranged on the inner sleeve, a plurality of groups of inner through holes are equidistantly arranged in each group of inner through holes, the inner through holes are equidistantly distributed around the inner sleeve, a first fixing groove is formed in the outer side of the inner sleeve at the lower end of each inner through hole, a second fixing groove is formed in the outer side of the inner sleeve at the upper end of each inner through hole, a first sealing rubber sleeve is arranged in each first fixing groove, a second, the bottom of mounting groove all with ring cylinder's bottom fixed connection, ring cylinder's inboard middle part all is provided with the cavity, equal sliding connection has ring rubber buffer in the cavity, the equal fixed connection in top middle part of ring rubber buffer is in the bottom of annular fall way, ring cylinder's top all runs through ring cylinder's top, the equal fixed connection in top of annular fall way is in the fixed bottom middle part all around on edge of annular, the fixed inboard on edge of annular all with interior sheathed tube outside fixed connection.

Preferably, the two sides of the interior of the outer sleeve are provided with limiting sliding grooves, the two sides of the exterior of the inner sleeve are provided with limiting sliding strips, and the limiting sliding strips are connected with the limiting sliding grooves in a sliding mode.

Preferably, a plurality of cuffs are arranged on the outer portion of the flushing pipe at equal intervals, and the cuffs are fixedly connected with the inner side of the inner sleeve through fixing rods arranged at equal intervals on the periphery.

Preferably, a plurality of groups of flushing ports are equidistantly arranged on the flushing pipe, and each group of flushing ports is divided into four flushing ports which are equidistantly arranged around the flushing pipe.

Preferably, the bottom end of the flushing pipe is fixedly connected to the middle part of the top end of the fixed end block, and the bottom end of the fixed end block is fixedly connected to the inner middle part of the guide shoe.

Preferably, the bottom end of the annular cylinder is provided with an air guide communicating pipe, and the other end of the air guide communicating pipe penetrates through the outer sleeve and is communicated with the pressurizing conduit.

Preferably, the bottom end of the outer side of the inner sleeve is fixedly connected to the inner side of a third sealing rubber sleeve, and the outer side of the third sealing rubber sleeve is connected with the inner side of the outer sleeve in a sliding manner.

Preferably, the inner through hole is correspondingly communicated with the outer through hole, and the annular lifting pipe is connected with the top end of the annular cylinder in a sliding manner.

The working principle is as follows: insert the well bore with the outer tube at first, then pour into sand-carrying liquid and gravel from interior sleeve pipe, sand-carrying liquid and gravel that pour into in interior sleeve pipe pass the interior through-hole on the interior sleeve pipe earlier, then flow through outer through-hole on the outer tube again and form annular filling layer between outer tube and the geological stratification, inject pressurized air into air guide communicating pipe through the pressure boost pipe after filling, pressurized air in the air guide communicating pipe flows into in the annular cylinder that corresponds and props up the annular rubber buffer, annular rubber buffer rethread annular riser jack-up interior sleeve pipe on the annular fixed edge, make interior through-hole on the interior sleeve pipe and the outer through-hole on the outer tube misplace from top to bottom and seal, inject pressure boost well-flushing liquid into interior sleeve pipe through the flushing pipe this moment, pressure boost well-flushing liquid washes out interior sleeve pipe's top mouth through the backwash.

The invention provides a positive filling tool. The method has the following beneficial effects:

after gravel mortar is filled, pressurized air is injected into the air guide communicating pipe through the pressurization guide pipe, the pressurized air in the air guide communicating pipe flows into the corresponding annular air cylinder to support the annular rubber plug, the annular rubber plug jacks up the annular fixing edge on the inner sleeve through the annular lifting pipe, so that the inner through hole on the inner sleeve and the outer through hole on the outer sleeve are staggered and sealed up and down, pressurized well washing liquid is injected into the inner sleeve through the flushing pipe, the pressurized well washing liquid backflushes mortar impurities in the inner sleeve out of the top pipe opening of the inner sleeve through the flushing opening, compared with the situation that the traditional filling tool flushes residual mortar and cleaning liquid in the inner sleeve into the well together, the invention can flush all the residual impurities and the mortar in the inner sleeve out of the top pipe opening after the filling and then collect the residual impurities and the mortar, and ensures that the flushed cleaning liquid can not influence geological layers in the well and the filled mortar, and the space between the flushing pipe and the inner sleeve is sufficient, so that mortar flushed by the column cannot be blocked, and the device is worthy of being popularized vigorously.

Drawings

FIG. 1 is a schematic view of a partial cross-sectional structure of the present invention;

FIG. 2 is a schematic view of the inner sleeve and the annular cylinder of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 1;

fig. 5 is an enlarged view at B in fig. 1.

Wherein, 1, the outer sleeve; 2. an inner sleeve; 3. a flush tube; 4. a pressurization conduit; 5. a first sealing rubber sleeve; 6. a third sealing rubber sleeve; 7. flushing the opening; 8. a fixed end block; 9. a ferrule; 10. an annular fixing edge; 11. an annular cylinder; 12. an annular riser; 13. a limiting slide bar; 14. a limiting chute; 15. mounting grooves; 16. a cavity; 17. an annular rubber plug; 18. an air guide communicating pipe; 19. an outer through hole; 20. an inner through hole; 21. a second sealing rubber sleeve; 22. fixing the rod; 23. a first fixing groove; 24. a second fixing groove; 25. a guide shoe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1-5, an embodiment of the present invention provides a forward filling tool, which includes an outer sleeve 1, an inner sleeve 2 disposed inside the outer sleeve 1, a flushing pipe 3 disposed in the middle of the inner sleeve 2, a pressurizing pipe 4 disposed on the right side of the outer sleeve 1, a bottom end of the outer sleeve 1 fixedly connected to the top end of a guide shoe 25, a plurality of sets of outer through holes 19 equidistantly disposed on the outer sleeve 1, a plurality of sets of inner through holes 20 equidistantly disposed on the inner sleeve 2, a first fixing groove 23 disposed on the outer side of the inner sleeve 2 at the lower end of each inner through hole 20, a second fixing groove 24 disposed on the outer side of the inner sleeve 2 at the upper end of each inner through hole 20, a first sealing rubber sleeve 5 disposed in the first fixing groove 23, and a second sealing rubber sleeve 21 disposed in the second fixing groove 24, the inner side of the outer sleeve 1 is equidistantly provided with a plurality of mounting grooves 15, the bottoms of the mounting grooves 15 are fixedly connected with the bottom of the annular cylinder 11, the middle part of the inner side of the annular cylinder 11 is provided with a cavity 16, the cavity 16 is internally and slidably connected with an annular rubber plug 17, the middle part of the top end of the annular rubber plug 17 is fixedly connected with the bottom end of the annular lifting pipe 12, the top end of the annular lifting pipe 12 penetrates through the top of the annular cylinder 11, the top end of the annular lifting pipe 12 is fixedly connected with the middle part of the periphery of the bottom end of the annular fixing edge 10, the inner side of the annular fixing edge 10 is fixedly connected with the outer side of the inner sleeve 2, after gravel mortar is filled, the pressurized air communicating pipe is injected into the air guide 18 through the pressurized air guide pipe 4, the pressurized air in the air guide communicating pipe 18 flows into the corresponding annular cylinder 11 to support the annular rubber plug 17, the, the inner through hole 20 on the inner sleeve 2 and the outer through hole 19 on the outer sleeve 1 are sealed in a vertically staggered mode, pressurized well washing liquid is injected into the inner sleeve 2 through the flushing pipe 3 at the moment, the pressurized well washing liquid backflushes mortar impurities in the inner sleeve 2 out of the top pipe opening of the inner sleeve 2 through the flushing opening 7, and compared with the situation that mortar and cleaning liquid remained in the pipe are flushed into the well together through a traditional filling tool, the invention can flush out all the redundant impurities and the mortar in the inner sleeve 2 after the filling is finished and then collect and process the residual impurities and the mortar, so that the flushed cleaning liquid cannot affect geological layers in the well and the filled mortar, the space between the flushing pipe 3 and the inner sleeve 2 is sufficient, and the mortar flushed by columns cannot be blocked.

The two sides of the inside of the outer sleeve 1 are provided with limiting sliding grooves 14, the two sides of the outside of the inner sleeve 2 are provided with limiting sliding strips 13, and the limiting sliding strips 13 are in sliding connection with the limiting sliding grooves 14, so that the inner through holes 20 can correspond to the outer through holes 19, and gravel mortar can pass through the holes smoothly.

A plurality of cuffs 9 are equidistantly arranged outside the flushing pipe 3, and the cuffs 9 are fixedly connected with the inner side of the inner sleeve 2 through fixing rods 22 equidistantly arranged on the periphery of the inner sleeve and used for fixing and limiting the flushing pipe 3.

The flushing pipe 3 is equidistantly provided with a plurality of groups of flushing ports 7, each group of flushing ports 7 is divided into four equidistantly arranged parts which are arranged around the flushing pipe 3, and the flushing efficiency is higher due to the plurality of flushing ports 7.

The bottom end of the flushing pipe 3 is fixedly connected to the middle part of the top end of the fixed end block 8, and the bottom end of the fixed end block 8 is fixedly connected to the inner middle part of the guide shoe 25 and used for fixing the bottom of the flushing pipe 3 and blocking the bottom end of the flushing pipe 3.

One end of the air guide communicating pipe 18 penetrates through and is fixedly connected to one side of the bottom end of the annular cylinder 11, the other end of the air guide communicating pipe 18 penetrates through the outer sleeve 1 and is communicated with the pressurizing conduit 4, and high-pressure air is conveyed to each annular cylinder 11 through the air guide communicating pipe 18.

The outside bottom end of interior sleeve pipe 2 is fixed connection in the inboard of third sealing rubber cover 6, and the outside of third sealing rubber cover 6 and the inboard sliding connection of outer tube 1 prevent that the gravel from flowing into between outer tube 1 and interior sleeve pipe 2.

The inner through hole 20 and the outer through hole 19 are respectively and correspondingly communicated, and the annular lifting pipe 12 is connected with the top end of the annular cylinder 11 in a sliding mode.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Forward filling tool, including outer tube (1), its characterized in that: the inner sleeve (2) is arranged in the outer sleeve (1), the flushing pipe (3) is arranged in the middle of the inner sleeve (2), the pressurizing pipe (4) is arranged on the right side of the outer portion of the outer sleeve (1), the bottom end of the outer sleeve (1) is fixedly connected to the top end of the guide shoe (25), a plurality of groups of outer through holes (19) are equidistantly arranged on the outer sleeve (1), a plurality of groups of outer through holes (19) are equidistantly arranged around the outer sleeve (1), a plurality of groups of inner through holes (20) are equidistantly arranged on the inner sleeve (2), a plurality of groups of inner through holes (20) are equidistantly arranged around the inner sleeve (2), first fixing grooves (23) are respectively arranged on the outer side of the inner sleeve (2) at the lower end of each inner through hole (20), second fixing grooves (24) are respectively arranged on the outer side of the inner sleeve (2) at the upper, be provided with first sealing rubber cover (5) in first fixed slot (23), be provided with second sealing rubber cover (21) in second fixed slot (24), the inboard equidistance of outer tube (1) is provided with a plurality of mounting groove (15), the bottom of mounting groove (15) all is connected with the bottom fixed connection of ring cylinder (11), the inboard middle part of ring cylinder (11) all is provided with cavity (16), equal sliding connection has ring rubber stopper (17) in cavity (16), the top middle part of ring rubber stopper (17) all fixed connection is in the bottom of ring lift pipe (12), the top of ring lift pipe (12) all runs through the top of ring cylinder (11), the equal fixed connection in the middle part all around the bottom of ring lift pipe (12) along (10), the inboard of ring fixed edge (10) all with the outside fixed connection of interior sleeve pipe (2), the bottom of annular cylinder (11) is provided with air guide communicating pipe (18), the other end of air guide communicating pipe (18) all runs through outer tube (1) and is linked together with pressure boost pipe (4), interior through-hole (20) correspond the intercommunication respectively with outer through-hole (19), the top sliding connection of annular fall way (12) and annular cylinder (11).

2. The forward filling tool of claim 1, wherein: the inner side of the outer sleeve (1) is provided with limiting sliding grooves (14), the outer side of the inner sleeve (2) is provided with limiting sliding strips (13), and the limiting sliding strips (13) are connected with the limiting sliding grooves (14) in a sliding mode.

3. The forward filling tool of claim 1, wherein: the outside equidistance of flushing pipe (3) is provided with a plurality of cuff (9), cuff (9) all through the inboard fixed connection of dead lever (22) that the equidistance all around set up with interior sleeve pipe (2).

4. The forward filling tool of claim 1, wherein: a plurality of groups of flushing ports (7) are equidistantly arranged on the flushing pipe (3), and each group of flushing ports (7) is divided into four equidistantly arranged around the flushing pipe (3).

5. The forward filling tool of claim 1, wherein: the bottom end of the flushing pipe (3) is fixedly connected to the middle part of the top end of the fixed end block (8), and the bottom end of the fixed end block (8) is fixedly connected to the inner middle part of the guide shoe (25).

6. The forward filling tool of claim 1, wherein: the bottom end of the outer side of the inner sleeve (2) is fixedly connected to the inner side of a third sealing rubber sleeve (6), and the outer side of the third sealing rubber sleeve (6) is connected with the inner side of the outer sleeve (1) in a sliding mode.