CN113898314A - Quick drilling type sitting and squeezing integrated temporary plugging device - Google Patents
Quick drilling type sitting and squeezing integrated temporary plugging device Download PDFInfo
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- CN113898314A CN113898314A CN202111209709.9A CN202111209709A CN113898314A CN 113898314 A CN113898314 A CN 113898314A CN 202111209709 A CN202111209709 A CN 202111209709A CN 113898314 A CN113898314 A CN 113898314A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention relates to a quick drilling type sitting and squeezing integrated temporary plugging device which comprises an upper connector, wherein a mandrel is screwed on a female thread at the lower end of the upper connector, a hydraulic mechanism is sleeved on the periphery of the lower part of the upper connector, a core pipe is screwed on the lower end of the mandrel, a tension ring is screwed on the periphery of the upper end of the core pipe, a rubber cylinder seat is screwed on the periphery of the tension ring, and a slip mechanism and a sitting and sealing mechanism which are driven by the hydraulic mechanism are arranged on the periphery of the rubber cylinder seat; the lower end of the core tube is inserted into the inner cavity of the floating sleeve, an ash injection tube is arranged on the periphery of the floating sleeve, the upper end of the ash injection tube is screwed at the lower end of the rubber tube seat, the sealing piston is fixed in the inner hole of the core tube through a pin and closes an ash injection channel of the core tube, and the lower end of the ash injection tube is screwed with a plug. The device can overcome the bridging plug that exists among the prior art and can not the deblocking after salvaging, and fishing tool takes off the hand difficulty, exists fishing tool and goes into the chamber difficulty simultaneously in big inclination, horizontal well section salvaging bridging plug, and the rubber is poor with the wall of a well is sealed and leads to the mortar and spill over the scheduling problem.
Description
Technical Field
The invention relates to an underground tool for an oil field, in particular to a fast drilling type seating and extruding integrated temporary plugging device, and belongs to the technical field of workover tools.
Background
The oil and gas field gets into the development later stage, and the broken section can appear in the sleeve pipe, need carry out crowded cement shutoff or the outer circulation of sleeve pipe to the target zone and seal scurring, and it is common means to use the bridge plug to carry out the card bed seal processing.
The existing oilfield uses a removable cement squeezing bridge plug, after the removable cement squeezing bridge plug is seated, a setting tool needs to be taken out, and then the cement squeezing tool needs to be taken down, and after the cement squeezing operation, a bridge plug fishing tool needs to be taken out, and after the bridge plug is taken out, a grinding tool needs to be taken down to drill off cement on the lower portion of the bridge plug. The retrievable ash squeezing bridge plug needs to be taken off two times of pipe columns for setting and squeezing, the bridge plug is influenced by high temperature and high pressure and liquid medium in a shaft for a long time, metal and rubber of the bridge plug are easy to corrode and rust and rubber are easy to carbonize, the bridge plug cannot be unsealed after being salvaged, and a fishing tool is difficult to release; and once the salvaging fails, the subsequent treatment workload is large, the operation cost is high, and the well completion period is long.
And secondly, the conventional bridge plug fishing operation has the problems that more and more well casing columns are not moved and equipment is replaced midway, so that the team efficiency is greatly reduced. If the hydraulic force is used for releasing the stuck object, the cost is increased by 3.2 ten thousand per well, and the successful releasing of the stuck object cannot be ensured.
In the later stage of oil field development, stable production is often required to be realized through a directional well, a side drilling well and a horizontal well, and the problems of difficult layer adjustment and ash injection and difficult metal bridge plug salvage exist in the later stage of the oil-water well with large inclination in the development process. Particularly, a fisher for fishing the bridge plug in a highly deviated well section is difficult to enter a cavity, taking 3 Chen flat 16 wells as an example, in a horizontal well section, the conventional bridge plug fishing tool takes 11 days to fish the bridge plug, and finally, the 350 workover rig is replaced, the drilling platform and the drill rod are installed, and the fishing of the lower male cone is successful. According to statistics, an oil production plant in the oil field of Jiangsu province has eight wells which are not successfully fished and are transferred to overhaul within one year, the operation cost is high, and the oil field development is influenced. For example, the Cao 11-11 well QSC (plug-in-squeeze integrated) works in the well for five years, is salvaged and lifted to 600KN and cannot be unsealed, and the price of overhaul operation is 70 ten thousand.
In the process of oil field development, the pressure coefficient of part of well formation is low, when the development is carried out on the upper part of the formation, a production formation needs to be temporarily blocked, and after the common cement slurry is replaced to an annular space, under the action of gravity, the cement slurry sinks, so that not only can the oil formation be polluted, but also the quality of a cement plug is unqualified, and if the conventional metal bridge plug is used, the drilling and grinding are difficult to carry out after the suspension is carried out on the upper part of the production formation. For wells that require protection of the bottom hydrocarbon layer, drilling and milling or cementing processes cannot be performed.
With the continuous development of measures such as shale gas in oil fields, the requirements on bridge plugs used for staged fracturing are continuously improved. Aiming at the problems existing in the prior oilfield separate injection under-injection well treatment, a bridge plug suitable for the special working condition requirement of an oil-water well is also needed. In order to solve the above problems, it is necessary to develop a novel bridge plug meeting the application requirements of the above working conditions.
Disclosure of Invention
The invention aims to provide a quick drilling type seating and extruding integrated temporary plugging device which can solve the problems that in the prior art, a bridge plug cannot be unsealed after being salvaged, a salvage tool is difficult to release hands, meanwhile, in the case of salvaging the bridge plug in a large-inclination horizontal well section, the salvage tool is difficult to enter a cavity, a rubber sheet is poor in sealing with a well wall, mortar overflows and the like.
In order to solve the technical problems, the quick drilling type sitting and extruding integrated temporary plugging device comprises an upper connector, wherein a mandrel is screwed to the lower end female thread of the upper connector, a hydraulic mechanism is sleeved on the periphery of the lower part of the upper connector, a core pipe is screwed to the lower end of the mandrel, a tension ring is screwed to the periphery of the upper end of the core pipe, a rubber cylinder seat is screwed to the periphery of the tension ring, and a slip mechanism and a sitting and sealing mechanism driven by the hydraulic mechanism are arranged on the periphery of the rubber cylinder seat; the lower extreme of core pipe inserts the cover inner chamber that floats, and the periphery of cover that floats is equipped with annotates an ash section of thick bamboo, the upper end of annotating an ash section of thick bamboo connects soon the lower extreme of packing element seat, and sealing piston passes through the pin to be fixed in the hole of core pipe and closes the notes ash passageway of core pipe, the lower extreme of annotating an ash section of thick bamboo connects soon has the end cap.
As an improvement of the invention, the mandrel comprises an upper mandrel and a lower mandrel, the upper end male thread of the upper mandrel is screwed in the lower end female thread of the upper joint, the upper end female thread of the lower mandrel is screwed with the lower end male thread of the upper mandrel, and the inner edge of the upper end opening of the lower mandrel is abutted against the lower part of the outer step of the upper mandrel.
As a further improvement of the invention, the hydraulic mechanism comprises an upper hydraulic cylinder and a lower hydraulic cylinder, the cylinder body of the upper hydraulic cylinder is sleeved on the periphery of the lower part of the upper joint, the top of the cylinder body of the upper hydraulic cylinder is hung on the periphery of the upper joint through a setting pin, and the bottom of the upper hydraulic cylinder abuts against and is sealed on the outer wall of the upper mandrel; the upper portion of lower hydraulic cylinder connects in the lower part periphery of last hydraulic cylinder soon, and the top of lower hydraulic cylinder supports and leans on in the outer step below of last hydraulic cylinder, the bottom of lower hydraulic cylinder supports and leans on and seals at the outer wall of dabber down.
As a further improvement of the invention, an upper hydraulic cavity is formed between the bottom of the upper joint and the bottom of the upper hydraulic cylinder, and an upper mandrel radial hole communicated with the upper hydraulic cavity is formed in the upper part of the upper mandrel.
As a further improvement of the invention, a stepped piston is arranged in an inner cavity of the lower hydraulic cylinder, the inner periphery of the lower part of the stepped piston is screwed on the outer periphery of the male thread at the upper end of the lower mandrel, and the upper part of the inner periphery of the stepped piston is pressed on the outer edge of the upper port of the lower mandrel; the inner wall of the upper part of the stepped piston is sealed with the outer wall of the upper mandrel, and the outer wall of the stepped piston is sealed with the inner wall of the lower hydraulic cylinder.
As a further improvement of the invention, a pressure relief cavity is arranged between the top of the stepped piston and the bottom of the upper hydraulic cylinder, and a lower hydraulic cylinder drainage hole communicated with the pressure relief cavity is arranged on the circumferential wall of the upper part of the lower hydraulic cylinder; a lower hydraulic cavity is formed between the bottom of the stepped piston and the bottom of the lower hydraulic cylinder, and a lower mandrel radial hole is formed in the circumference of the upper portion of the lower mandrel and communicated with the lower hydraulic cavity.
As a further improvement of the invention, the periphery of the lower part of the lower hydraulic cylinder is screwed with a push cylinder, the upper part of the push cylinder is provided with a push cylinder drainage hole communicated with the inner cavity of the push cylinder, and the lower end of the push cylinder is sleeved on the periphery of the upper part of the rubber cylinder seat and drives the slip mechanism and the setting mechanism; the lower end head of the lower mandrel is abutted against the upper part of the core pipe boss, the inner periphery of the upper end of the rubber cylinder seat is screwed with a tension ring, the inner thread of the upper part of the tension ring is screwed below the core pipe boss, the bottom of the tension ring is supported on the inner step of the upper port of the rubber cylinder seat, and an annular groove is arranged along the circumference of the tension ring.
As a further improvement of the invention, the large-diameter section of the upper part of the rubber cylinder seat is screwed on the periphery of the tension ring, the slip mechanism and the setting mechanism are sleeved on the periphery of the middle section of the rubber cylinder seat, the setting mechanism comprises a long rubber cylinder positioned in the middle, short rubber cylinders are symmetrically arranged at the upper end and the lower end of the long rubber cylinder, cones are respectively arranged on the outer sides of the short rubber cylinders, slips are respectively pressed on the conical surfaces of the cones, a pressing cap is arranged at the upper end of the slip at the upper part, the top of the pressing cap is abutted against the lower end of the push cylinder, and the bottom of the slip at the lower part is abutted against the top of the ash injection cylinder.
As a further improvement of the invention, the outer wall of the core tube is sealed with the inner wall of the rubber cylinder seat through a plurality of core tube sealing rings, a plurality of long grooves of the ash injection cylinder extending along the vertical direction are arranged on the periphery of the lower part of the ash injection cylinder, and a plurality of long grooves of the plug communicated with the long grooves of the ash injection cylinder are arranged on the periphery of the plug; the lower part of the long groove of the ash injection cylinder is provided with an ash injection cylinder bypass hole, the lower end of the core pipe is provided with a core pipe bypass hole, the middle part of the floating sleeve is provided with a floating sleeve bypass hole, each group of core pipe bypass hole, floating sleeve bypass hole and ash injection cylinder bypass hole are corresponding and coaxial, the sealing piston seals the inner port of each core pipe bypass hole, and the top of the sealing piston is abutted against the lower part of the inner step of the core pipe; and the inner wall of the ash injection cylinder is provided with an O-shaped ring of the ash injection cylinder to realize the sealing of the upper side and the lower side of the bypass hole of each ash injection cylinder and the outer wall of the floating sleeve.
As a further improvement of the invention, the lower ends of the floating sleeve and the core tube are inserted into the inner cavity of the plug, the bottom of the floating sleeve is abutted against the corner of the bottom wall of the plug, the lower part of the core tube is provided with a core tube lower frustum which is pressed above the lower frustum of the floating sleeve, and the inner wall of the lower part of the floating sleeve is sealed with the lower part of the core tube lower frustum through an O-shaped ring of the floating sleeve.
Compared with the prior art, the invention has the following beneficial effects: the anchoring, setting, leakage stoppage and recanalization can be realized only by pulling the pipe column once, and particularly, the pipe column can quickly drill and remove the bridge plug and the cement on the lower part of the bridge plug without fishing after leakage stoppage. The requirement of short-time plugging of the horizontal well is met, salvaging and drilling and grinding procedures are reduced, the problems that a salvaging device of the horizontal well is difficult to enter a cavity, mortar overflows and cannot be salvaged, the operation cost is high and the like are solved, the drilling blocking risk is reduced, and the requirement of low-cost operation is met.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.
FIG. 1 is a schematic structural view of a fast drilling type seating-extruding integrated temporary plugging device according to the present invention;
fig. 2 is a schematic structural view of the floating sleeve of the present invention.
In the figure: 1. an upper joint; 1a, an upper joint sealing ring; 2. setting the pin; 3. feeding a liquid cylinder; 3a, mounting a cylinder sealing ring; 4. an upper mandrel; 4a, forming a radial hole in the upper mandrel; 5. discharging the liquid cylinder; 5a, discharging a hole of the lower cylinder; 5b, a lower cylinder sealing ring; 6. a stepped piston; 7. a lower mandrel; 7a, a lower mandrel radial hole; 8. a push cylinder; 8a, a push cylinder drainage hole; 9. a core tube; 9a, a core tube boss; 9b, a core tube sealing ring; 9c, reducing the diameter of the core pipe; 9d, a core pipe bypass hole; 9e, mounting a frustum on the core pipe; 9f, expanding the diameter of the core pipe; 9g, axial holes of core pipes; 10. a tension ring; 11. a rubber cylinder seat; 12. pressing the cap; 13. slips; 14. a cone; 15. a rubber cylinder support; 16. a short rubber cylinder; 17. a long rubber cylinder; 18. injecting an ash cylinder; 18a, long grooves of the ash injection cylinder; 18b, a bypass hole of the ash injection cylinder; 18c, injecting an O-shaped ring of the ash injection cylinder; 19. a floating sleeve; 19a, mounting an inner frustum on the floating sleeve; 19b.U shaped slots; 19c, floating sleeve lower inner frustum; 19d, floating sleeve bypass holes; 19e, floating sleeve O-shaped ring; 19f, sleeving an outer boss on the floating sleeve; 20. a sealing piston; 21. a plug; and 21a, a plug long groove.
Detailed Description
As shown in fig. 1 and 2, the fast drilling type seating-extruding integrated temporary plugging device of the invention comprises an upper joint 1, a mandrel is screwed on a female thread at the lower end of the upper joint 1, a hydraulic mechanism is sleeved on the periphery of the lower part of the upper joint 1, a core pipe 9 is screwed on the lower end of the mandrel, a tension ring 10 is screwed on the periphery of the upper end of the core pipe 9, a rubber cylinder seat 11 is screwed on the periphery of the tension ring 10, and a slip mechanism and a seating mechanism driven by the hydraulic mechanism are arranged on the periphery of the rubber cylinder seat 11; the lower end of the core tube 9 is inserted into the inner cavity of the floating sleeve 19, the periphery of the floating sleeve 19 is provided with an ash injection tube 18, the upper end of the ash injection tube 18 is screwed at the lower end of the rubber tube seat 11, a sealing piston 20 is fixed in the inner hole of the core tube 9 through a pin and closes an ash injection channel of the core tube 9, and the lower end of the ash injection tube 18 is screwed with a plug 21.
The dabber includes upper spindle 4 and lower dabber 7, and the upper end pin thread of upper spindle 4 connects in the lower extreme box thread of top connection 1 soon. The big port inner wall in upper end of lower core axle 7 is equipped with female screw, and the outer wall is equipped with the pin thread, and the box thread in upper end of lower core axle 7 connects with the lower extreme pin thread of last core axle 4 mutually soon, and the last port inner edge of lower core axle 7 supports and leans on in the outer step below of last core axle 4.
The hydraulic mechanism comprises an upper hydraulic cylinder 3 and a lower hydraulic cylinder 5, wherein the cylinder body of the upper hydraulic cylinder 3 is sleeved on the periphery of the lower part of the upper connector 1, and sealing is realized through an upper connector sealing ring 1a and the inner wall of the upper hydraulic cylinder 3. Go up the cylinder body top of hydraulic cylinder 3 and hang in the periphery of top connection 1 through setting up pin 2, go up the bottom of hydraulic cylinder 3 and lean on and seal the outer wall at last dabber 4 through last hydraulic cylinder sealing washer 3a.
The upper portion of lower hydraulic cylinder 5 connects in the lower part periphery of last hydraulic cylinder 3 soon, and the top of lower hydraulic cylinder 5 supports and leans on in the outer step below of last hydraulic cylinder 3, and the bottom of lower hydraulic cylinder 5 supports and leans on and seals at the outer wall of dabber 7 down through lower hydraulic cylinder sealing washer 5b.
An upper hydraulic cavity is formed between the bottom of the upper joint 1 and the bottom of the upper hydraulic cylinder 3, and an upper mandrel radial hole 4a is formed in the upper portion of the upper mandrel 4 and communicated with the upper hydraulic cavity.
The inner chamber of lower hydraulic cylinder 5 is equipped with ladder piston 6, connects at the upper end pin thread periphery of dabber 7 down in the lower part internal week of ladder piston 6 soon, and the outer fringe of dabber 7 upper port is pressed down to the internal week upper portion of ladder piston 6, and ladder piston 6 obtains the location on dabber 7 down, follows that dabber 7 floats down, and the upper portion inner wall of ladder piston 6 and the outer wall of last dabber 4 realize sealed, and the outer wall of ladder piston 6 and the inner wall of lower hydraulic cylinder 5 realize sealed.
A pressure relief cavity is arranged between the top of the stepped piston 6 and the bottom of the upper hydraulic cylinder 3, and a lower hydraulic cylinder relief hole 5a communicated with the pressure relief cavity is arranged on the circumferential wall of the upper part of the lower hydraulic cylinder 5; a lower hydraulic cavity is formed between the bottom of the stepped piston 6 and the bottom of the lower hydraulic cylinder 5, and a lower mandrel radial hole 7a is formed in the circumference of the upper portion of the lower mandrel 7 and communicated with the lower hydraulic cavity.
The lower part periphery of the lower hydraulic cylinder 5 is screwed with a push cylinder 8, the upper part of the push cylinder 8 is provided with a push cylinder drainage hole 8a which is communicated with the inner cavity of the push cylinder, the lower end of the push cylinder 8 is sleeved on the upper part periphery of the rubber cylinder seat 11 and drives the slip mechanism and the setting mechanism, and a gap is left between the inner wall of the push cylinder 8 and the upper part outer wall of the rubber cylinder seat 11.
The lower end head of the lower mandrel 7 is abutted against the upper part of the core tube boss 9a, so that the lower mandrel 7 and the core tube 9 are axially positioned. The inner circumference of the upper end of the rubber cylinder seat 11 is screwed with a tension ring 10, and the internal thread of the upper part of the tension ring 10 is screwed below the core tube boss 9a, so that the top of the tension ring 10 and the core tube 9 are axially positioned. The bottom of the tension ring 10 is supported on an inner step of an upper port of the rubber cylinder seat 11, so that the bottom of the tension ring 10 and the rubber cylinder seat 11 are axially positioned. An annular groove is arranged along the circumference of the tension ring 10 to control the snapping pressure of the tension ring 10, the snapping pressure is greater than the setting pressure, and the tension ring 10 cannot be snapped when the setting mechanism sets.
Pressure liquid enters the upper hydraulic cavity from the upper mandrel radial hole 4a, thrust is applied to the bottom of the upper hydraulic cylinder 3, and the thrust of the upper hydraulic cylinder 3 is applied to the lower hydraulic cylinder 5; meanwhile, pressure liquid enters the lower hydraulic cavity from the radial hole 7a of the lower mandrel, thrust is applied to the bottom of the lower hydraulic cylinder 5, the stepped piston 6 is fixed to the top of the lower hydraulic cavity, the lower hydraulic cylinder 5 can only slide downwards, and the setting pin 2 controls setting pressure. When the wellhead pressure reaches the setting pressure, the setting pin 2 is sheared by two superimposed thrusts of the upper hydraulic cylinder 3 and the lower hydraulic cylinder 5, and the thrusts of the hydraulic cylinders act on the top of the push cylinder 8 to generate enough anchoring and setting pressure.
The lower hydraulic cylinder drain hole 5a can prevent pressure building between the upper hydraulic cylinder 3 and the stepped piston 6, and the push cylinder drain hole 8a can prevent pressure building in the inner cavity of the push cylinder.
The large diameter section of the upper part of the rubber cylinder seat 11 is screwed on the periphery of the tension ring 10, the tension ring 10 is in a step shape with a narrow upper part and a wide lower part, the diameter of the thread section below the core tube boss 9a is larger and is screwed with the thinner upper part of the tension ring 10, and the light pipe section at the lower part of the thread section accommodates the thicker lower part of the tension ring 10. The annular groove is positioned at the diameter-changing part of the tension ring 10, and the stress at the diameter-changing part is concentrated and weakest, so that the annular groove is convenient to cut.
The slips mechanism and the setting mechanism are sleeved on the periphery of the middle section of the rubber cylinder seat 11, the setting mechanism comprises a long rubber cylinder 17 located in the middle, short rubber cylinders 16 are symmetrically arranged at the upper end and the lower end of the long rubber cylinder 17, cones 14 are respectively arranged on the outer sides of the short rubber cylinders 16, slips 13 are respectively pressed on the conical surfaces of the cones 14, a pressing cap 12 is arranged at the upper end of each upper slip 13, the top of the pressing cap 12 is abutted against the lower end of the push cylinder 8, and the bottom of each lower slip 13 is abutted against the top of the ash injection cylinder 18.
The pressure of the push cylinder 8 acts on the press cap 12, the press cap 12 downwards presses the upper slips, and the slips 13 at the upper end and the lower end respectively slide towards the large end along the conical surface of the cone 14, so that the slips 13 are anchored on the inner wall of the sleeve; meanwhile, the cone 14 extrudes the short rubber tube 16 and the long rubber tube 17 in opposite directions, the short rubber tube 16 is hard, the long rubber tube 17 is soft, the middle part of the long rubber tube 17 expands outwards after being extruded, and the long rubber tube is seated on the inner wall of the sleeve to seal the annular space of the sleeve.
The matching surface between the top of the upper slip and the bottom of the pressure cap 12 is an inclined surface which is inclined inwards and downwards, the matching surface between the top of the lower slip and the top of the ash injection barrel 18 is an inclined surface which is inclined outwards and downwards, and the matching of the inclined surfaces is beneficial to the slip to slide to the large end of the cone 14.
The taper root of the short rubber tube 16 is respectively inserted into the taper hole of the rubber tube support 15, a gap is reserved between the rubber tube support 15 and the corresponding cone 14, the roots of the rubber tube support and the corresponding cone 14 are connected into a whole, when the short rubber tube 16 is extruded, the rubber tube support 15 deforms to the gap between the rubber tube support and the cone 14 to form an opening state, the short rubber tube 16 can be accommodated better, and the short rubber tube 16 is protected.
The outer wall of the core tube 9 is sealed with the inner wall of the rubber cylinder seat 11 through a plurality of core tube sealing rings 9b, and more than eight core tube sealing rings 9b are usually arranged, so that the sealing performance can be kept well after the core tube 9 is plugged and pulled for a plurality of times. The periphery of the lower part of the ash injection cylinder 18 is provided with a plurality of vertically extending ash injection cylinder long grooves 18a, and the periphery of the choke plug 21 is provided with a plurality of choke plug long grooves 21a communicated with the ash injection cylinder long grooves 18a.
The lower part of the long groove 18a of the ash injection cylinder is provided with an ash injection cylinder bypass hole 18b, the lower end of the core pipe 9 is provided with a core pipe bypass hole 9d, the middle part of the floating sleeve 19 is provided with a floating sleeve bypass hole 19d, each group of core pipe bypass holes 9d, floating sleeve bypass holes 19d and ash injection cylinder bypass holes 18b correspond to and share the same axis, the sealing piston 20 seals the inner port of each core pipe bypass hole 9d, a bypass channel is cut off, the well mouth is pressed and set conveniently, after setting, pressurization is continued to break the tension ring 10, the separation of the core pipe 9 and the rubber cylinder seat 11 is realized, and the core pipe 9 can be plugged and pulled conveniently. The top of the sealing piston 20 is abutted against the lower part of the inner step of the core tube, so that the axial positioning between the sealing piston and the core tube 9 is realized, and the sealing piston 20 only can move downwards but cannot move upwards.
The inner wall of the ash injection barrel 18 is provided with an ash injection barrel O-shaped ring 18c to realize the sealing of the upper side and the lower side of each ash injection barrel bypass hole 18b and the outer wall of the floating sleeve 19, so that cement paste cannot leak into the space of the floating sleeve 19 during the cement injection.
When the tension ring 10 is cut off, the pipe column is lifted up to draw the core pipe 9 out of the upper joint 1, at the moment, the pin of the sealing piston 20 is cut off by pressurizing the well mouth, the center of the bottom wall of the core pipe 9 can be provided with the axial hole 9g of the core pipe, the pressure build-up in the lower space of the sealing piston 20 is avoided, and the pin of the sealing piston 20 is favorably and accurately cut off. The bottom of the inner cavity of the core tube 9 is provided with a core tube expanding section 9f which is beneficial to containing the falling sealing piston 20.
A through-going piston centre hole may be provided along the centre of the sealing piston 20, so that when the lower end of the core tube 9 is located in the plug 21, the dead space is prevented from building up pressure. The aperture of the central hole of the piston is less than 6mm, and the flow area is small, so that the pressure build-up at the bottom of the sealing piston 20 can be avoided, and the pin of the sealing piston 20 can be smoothly cut off when the large-displacement pressure build-up at the well head is not influenced.
When the sealing piston 20 falls into the bottom of the core pipe 9, the core pipe 9 is inserted to the bottom again, the core pipe bypass hole 9d, the floating sleeve bypass hole 19d and the cement injection cylinder bypass hole 18b form a through bypass channel, cement slurry is injected from a wellhead, descends along the center of a pipe column, sequentially passes through the core pipe bypass hole 9d, the floating sleeve bypass hole 19d and the cement injection cylinder bypass hole 18b, and enters a casing annulus below a setting part. And (4) pressing the well mouth to a certain pressure, pressing cement slurry into a leakage point, and realizing plugging.
The tool is made of drillable composite materials, and after cement slurry is solidified, a grind shoe is put in, and the bridge plug and cement on the lower part of the bridge plug are drilled out. The cement solidified in each ash injection cylinder long groove 18a and each plug long groove 21a can play a role in fixing, so that tools are prevented from falling or rotating along with the tools during milling and drilling, and the underground tools can be completely drilled and removed.
The lower ends of the floating sleeve 19 and the core tube 9 are inserted into the inner cavity of the plug 21, the bottom of the floating sleeve 19 is abutted against the corner of the bottom wall of the plug 21, the lower part of the core tube 9 is provided with a core tube lower frustum, and the core tube lower frustum is pressed above the lower frustum of the floating sleeve 19 to be mutually positioned; the lower inner wall of the floating sleeve 19 is sealed with the lower part of the lower cone table of the core tube through an O-shaped ring 19e of the floating sleeve.
A core tube reducing section 9c is arranged on the outer circumference of the core tube 9 where the core tube bypass hole 9d is positioned, and a core tube upper frustum 9e is arranged at the lower end of the core tube reducing section 9 c; the inner periphery of the upper part of the floating sleeve 19 is provided with a floating sleeve upper inner frustum 19a matched with the core tube upper frustum 9e, the upper part of the floating sleeve 19 is uniformly distributed with a plurality of U-shaped grooves 19b extending downwards, and the outer periphery of the upper part of the floating sleeve 19 is provided with a floating sleeve upper outer boss 19f.
The U-shaped groove 19b is generally divided into six equal parts, so that the upper part of the floating sleeve 19 has certain elasticity, and the core tube reduced diameter section 9c provides a certain elastic space for the upper part of the floating sleeve 19. After the leakage point finishes grouting, the pipe column is lifted up to enable the core pipe 9 to be pulled out for a certain distance again, when the upper cone table 9e of the core pipe moves upwards to the upper portion of the floating sleeve 19, the upper cone table 9e of the core pipe hangs the inner cone table 19a of the floating sleeve to drive the floating sleeve 19 to move upwards for a certain distance together until the outer boss 19f of the floating sleeve contacts the bottom of the rubber barrel seat 11, the floating sleeve 19 falls off from the core pipe 9 under the elastic action, the outer boss 19f of the floating sleeve plays a role of hanging removal, at the moment, the bypass hole 19d of the floating sleeve moves upwards to be staggered with the bypass hole 9d of the core pipe and the bypass hole 18b of the ash injection barrel, the bypass hole 18b of the ash injection barrel is sealed, and cement paste injected into the leakage point is prevented from flowing back.
The complete working process of the fast drilling type seating and extruding integrated temporary plugging device is as follows:
firstly, connecting a conical female thread on the upper part of an upper joint 1 with a construction pipe column, and descending a bridge plug to a downhole design position;
secondly, the setting pin 2 is sheared by pressing of a cement vehicle on the ground, the upper hydraulic cylinder 3 pushes the lower hydraulic cylinder 5 to move downwards, the lower hydraulic cylinder 5 pushes the push cylinder 8 to move downwards, the push cylinder 8 pushes the press cap 12 to move downwards, the press cap 12 pushes the slips 13 to be anchored on the inner wall of the casing, and the long rubber cylinder 17 and the short rubber cylinder 16 compress and seal the annular space of the casing;
when the pressure of the well head exceeds the tensile limit of the tension ring 10, the tension ring 10 is broken at the annular groove, so that the core pipe 9 is separated from the rubber barrel seat 11;
lifting the construction pipe column for a certain distance, and pulling the upper joint 1, the upper core shaft 4, the lower core shaft 7 and the core pipe 9 out of the upper hydraulic cylinder;
fifthly, shearing the pin of the sealing piston 20 through pressing of the ground cement truck, and enabling the sealing piston 20 to fall into the bottom of the core pipe 9;
sixthly, lowering the pipe column, and reinserting the core pipe 9 along the axis of the bridge plug until a lower core pipe frustum at the lower part of the core pipe 9 is pressed on a lower inner cone platform 19c of the floating sleeve, so that the core pipe bypass hole 9d, the floating sleeve bypass hole 19d and the ash injection barrel bypass hole 18b are communicated;
grouting cement slurry into the underground through a cement truck, enabling the cement slurry to enter a casing annulus below a cement cylinder from a cement injection cylinder bypass hole 18b, pressurizing a proper load, and extruding the cement slurry into a casing leakage point to realize plugging;
after the squeeze sealing construction operation is finished, the pipe column is lifted for a certain distance, the core pipe 9 is pulled up again, the upper frustum 9e of the core pipe is hung on the inner frustum 19a of the floating sleeve to enable the floating sleeve 19 to move upwards for a certain distance, when the outer boss 19f of the floating sleeve touches the bottom of the rubber cylinder seat 11, the floating sleeve 19 is separated from the core pipe 9, the lower end of the floating sleeve 19 closes the port of the bypass hole 18b of the ash injection cylinder, and therefore backflow of cement paste is avoided;
the self-lifting is continued to lift the core pipe 9 out of the upper part of the upper hydraulic cylinder 3, the flushing fluid is injected from the annular space of the casing pipe, enters the inner cavity of the core pipe above the setting position of the rubber cylinder, can enter from a bypass hole 9d of the core pipe or an axial hole 9g of the core pipe, goes upwards along a central hole of the core pipe, and replaces cement slurry in the core pipe 9 and an upper pipe column out of a wellhead;
the extrusion sealing pipe column is lifted to a safe position, and the casing annulus below the setting position enters cement slurry for waiting for setting;
after the cement paste is solidified, the mill shoe is put in, and the bridge plug and the cement at the lower part of the bridge plug are drilled out.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.
Claims (10)
1. The utility model provides a crowded integrative stifled device temporarily is sat to fast formula of boring, includes the top connection, its characterized in that: the lower end female thread of the upper joint is screwed with a mandrel, the periphery of the lower part of the upper joint is sleeved with a hydraulic mechanism, the lower end of the mandrel is screwed with a core pipe, the periphery of the upper end of the core pipe is screwed with a tension ring, the periphery of the tension ring is screwed with a rubber cylinder seat, and the periphery of the rubber cylinder seat is provided with a slip mechanism and a setting mechanism which are driven by the hydraulic mechanism; the lower extreme of core pipe inserts the cover inner chamber that floats, and the periphery of cover that floats is equipped with annotates an ash section of thick bamboo, the upper end of annotating an ash section of thick bamboo connects soon the lower extreme of packing element seat, and sealing piston passes through the pin to be fixed in the hole of core pipe and closes the notes ash passageway of core pipe, the lower extreme of annotating an ash section of thick bamboo connects soon has the end cap.
2. The fast drilling type sitting extrusion integrated temporary plugging device according to claim 1, wherein: the dabber includes upper spindle and lower dabber, the male thread of upper end of upper spindle connects soon in the female thread of lower extreme of top connection, the female thread of upper end of lower dabber with the male thread of lower extreme of upper spindle connects soon mutually, and the upper end mouth inner edge of lower dabber supports and leans on in the outer step below of upper spindle.
3. The fast drilling type sitting extrusion integrated temporary plugging device according to claim 2, wherein: the hydraulic mechanism comprises an upper hydraulic cylinder and a lower hydraulic cylinder, the cylinder body of the upper hydraulic cylinder is sleeved on the periphery of the lower part of the upper joint, the top of the cylinder body of the upper hydraulic cylinder is hung on the periphery of the upper joint through a setting pin, and the bottom of the upper hydraulic cylinder abuts against and is sealed on the outer wall of the upper mandrel; the upper portion of lower hydraulic cylinder connects in the lower part periphery of last hydraulic cylinder soon, and the top of lower hydraulic cylinder supports and leans on in the outer step below of last hydraulic cylinder, the bottom of lower hydraulic cylinder supports and leans on and seals at the outer wall of dabber down.
4. The fast drilling type sitting extrusion integrated temporary plugging device according to claim 3, wherein: an upper hydraulic cavity is formed between the bottom of the upper joint and the bottom of the upper hydraulic cylinder, and an upper mandrel radial hole is formed in the upper portion of the upper mandrel and communicated with the upper hydraulic cavity.
5. The fast drilling type sitting extrusion integrated temporary plugging device according to claim 4, wherein: a stepped piston is arranged in the inner cavity of the lower hydraulic cylinder, the inner periphery of the lower part of the stepped piston is screwed on the outer periphery of the male thread at the upper end of the lower mandrel, and the upper part of the inner periphery of the stepped piston is pressed on the outer edge of the upper port of the lower mandrel; the inner wall of the upper part of the stepped piston is sealed with the outer wall of the upper mandrel, and the outer wall of the stepped piston is sealed with the inner wall of the lower hydraulic cylinder.
6. The fast drilling type sitting extrusion integrated temporary plugging device according to claim 5, wherein: a pressure relief cavity is arranged between the top of the stepped piston and the bottom of the upper hydraulic cylinder, and a lower hydraulic cylinder drainage hole is arranged on the circumferential wall of the upper part of the lower hydraulic cylinder and communicated with the pressure relief cavity; a lower hydraulic cavity is formed between the bottom of the stepped piston and the bottom of the lower hydraulic cylinder, and a lower mandrel radial hole is formed in the circumference of the upper portion of the lower mandrel and communicated with the lower hydraulic cavity.
7. The fast drilling type sitting extrusion integrated temporary plugging device according to claim 3, wherein: the periphery of the lower part of the lower hydraulic cylinder is screwed with a push cylinder, the upper part of the push cylinder is provided with a push cylinder drainage hole communicated with the inner cavity of the push cylinder, and the lower end of the push cylinder is sleeved on the periphery of the upper part of the rubber cylinder seat and drives the slip mechanism and the setting mechanism; the lower end head of the lower mandrel is abutted against the upper part of the core pipe boss, the inner periphery of the upper end of the rubber cylinder seat is screwed with a tension ring, the inner thread of the upper part of the tension ring is screwed below the core pipe boss, the bottom of the tension ring is supported on the inner step of the upper port of the rubber cylinder seat, and an annular groove is arranged along the circumference of the tension ring.
8. The fast drilling type sitting extrusion integrated temporary plugging device according to claim 7, wherein: the large-diameter section of the upper portion of the rubber cylinder seat is connected to the periphery of the tension ring in a screwing mode, the slip mechanism and the setting mechanism are sleeved on the periphery of the middle section of the rubber cylinder seat, the setting mechanism comprises a long rubber cylinder located in the middle, short rubber cylinders are symmetrically arranged at the upper end and the lower end of the long rubber cylinder, cones are arranged on the outer sides of the short rubber cylinders respectively, slips are pressed on the conical surfaces of the cones respectively, a pressing cap is arranged at the upper end of the slip at the upper portion, the top of the pressing cap abuts against the lower end of the push cylinder, and the bottom of the slip at the lower portion abuts against the top of the ash injection cylinder.
9. The fast drilling type sitting extrusion integrated temporary plugging device according to claim 1, wherein: the outer wall of the core pipe is sealed with the inner wall of the rubber cylinder seat through a plurality of core pipe sealing rings, a plurality of long grooves of the ash injection cylinder extending vertically are arranged on the periphery of the lower part of the ash injection cylinder, and a plurality of long grooves of the plug communicated with the long grooves of the ash injection cylinder are arranged on the periphery of the plug; the lower part of the long groove of the ash injection cylinder is provided with an ash injection cylinder bypass hole, the lower end of the core pipe is provided with a core pipe bypass hole, the middle part of the floating sleeve is provided with a floating sleeve bypass hole, each group of core pipe bypass hole, floating sleeve bypass hole and ash injection cylinder bypass hole are corresponding and coaxial, the sealing piston seals the inner port of each core pipe bypass hole, and the top of the sealing piston is abutted against the lower part of the inner step of the core pipe; and the inner wall of the ash injection cylinder is provided with an O-shaped ring of the ash injection cylinder to realize the sealing of the upper side and the lower side of the bypass hole of each ash injection cylinder and the outer wall of the floating sleeve.
10. The fast drilling type sitting extrusion integrated temporary plugging device according to claim 9, wherein: the lower ends of the floating sleeve and the core tube are inserted into the inner cavity of the plug, the bottom of the floating sleeve abuts against the corner of the bottom wall of the plug, a core tube lower frustum is arranged at the lower part of the core tube and is pressed above the lower frustum of the floating sleeve, and the inner wall of the lower part of the floating sleeve is sealed with the lower part of the core tube lower frustum through an O-shaped ring of the floating sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111209709.9A CN113898314A (en) | 2021-10-18 | 2021-10-18 | Quick drilling type sitting and squeezing integrated temporary plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111209709.9A CN113898314A (en) | 2021-10-18 | 2021-10-18 | Quick drilling type sitting and squeezing integrated temporary plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113898314A true CN113898314A (en) | 2022-01-07 |
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|---|---|---|---|
| CN202111209709.9A Pending CN113898314A (en) | 2021-10-18 | 2021-10-18 | Quick drilling type sitting and squeezing integrated temporary plugging device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837606A (en) * | 2022-05-27 | 2022-08-02 | 中国石油化工股份有限公司 | Plugging combination tool for staged fracturing of vertical well section |
| CN114893150A (en) * | 2022-04-29 | 2022-08-12 | 中石化石油工程技术服务有限公司 | Hydraulic setting and cement injecting integrated tool for bridge plug |
| CN114934758A (en) * | 2022-05-30 | 2022-08-23 | 中国石油化工股份有限公司 | Well-flushing temporary plugging tool for fracturing of low-permeability reservoir horizontal well |
| CN114837606B (en) * | 2022-05-27 | 2024-05-03 | 中国石油化工股份有限公司 | Plugging combination tool for shaft section segmented fracturing |
-
2021
- 2021-10-18 CN CN202111209709.9A patent/CN113898314A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893150A (en) * | 2022-04-29 | 2022-08-12 | 中石化石油工程技术服务有限公司 | Hydraulic setting and cement injecting integrated tool for bridge plug |
| CN114893150B (en) * | 2022-04-29 | 2024-04-09 | 中石化石油工程技术服务有限公司 | Bridge plug hydraulic setting and ash injection integrated tool |
| CN114837606A (en) * | 2022-05-27 | 2022-08-02 | 中国石油化工股份有限公司 | Plugging combination tool for staged fracturing of vertical well section |
| CN114837606B (en) * | 2022-05-27 | 2024-05-03 | 中国石油化工股份有限公司 | Plugging combination tool for shaft section segmented fracturing |
| CN114934758A (en) * | 2022-05-30 | 2022-08-23 | 中国石油化工股份有限公司 | Well-flushing temporary plugging tool for fracturing of low-permeability reservoir horizontal well |
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