CN112211588A - Multi-layer fracturing setting tool structure with fixed pipe column - Google Patents
Multi-layer fracturing setting tool structure with fixed pipe column Download PDFInfo
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- CN112211588A CN112211588A CN202011313914.5A CN202011313914A CN112211588A CN 112211588 A CN112211588 A CN 112211588A CN 202011313914 A CN202011313914 A CN 202011313914A CN 112211588 A CN112211588 A CN 112211588A
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- 238000005516 engineering process Methods 0.000 abstract description 4
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- 229920003169 water-soluble polymer Polymers 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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Abstract
The invention discloses a multi-layer fracturing setting tool structure of a fixed pipe column, which comprises a main body, wherein a packer setting barrel is arranged at the top end of the main body, a safety joint is arranged at the bottom end of the packer setting barrel, the lower end of the safety joint is connected with a Y541 packer, a jar is arranged at the bottom end of the Y541 packer, a control switch is arranged at the bottom end of the jar, a combined fracturing layer is arranged at the bottom end of a first fracturing layer, a Y341 packer is arranged at the top end inside the combined fracturing layer, a sliding sleeve sealer is arranged at the bottom end of the Y341 packer, and a combined control switch is arranged at the bottom end of the sliding sleeve sealer. According to the fracturing setting tool, the fracturing setting tool is improved and perfected, the one-time multi-layer fracturing of the immobile pipe column is realized by using the sliding sleeve ball-throwing technology, the one-time large-thickness effective utilization of the ultra-low permeability reservoir is realized, an effective way is found for improving the single-well productivity, the construction period is greatly shortened, and the construction success rate is obviously improved.
Description
Technical Field
The invention relates to a fracturing technology, in particular to a multi-layer fracturing setting tool structure with an immovable pipe column.
Background
As is known, the reservoir of an oil field exploratory well is mostly a low-permeability oil layer, the thickness of a single layer is small, the number of layers is large, usually, one well contains two or more oil layers needing fracturing, a development well can adopt a casing string fracturing multilayer by adopting a method of throwing balls to make sliding sleeves, and the exploratory well needs to test the well temperature before and after fracturing and cannot adopt a fracturing method of the development well for draining liquid to ask for production.
At present, oil field exploration wells and evaluation wells are mostly low-permeability oil layers, have the characteristics of small single-layer thickness and more layers, and usually one well at least contains 2 or more oil layers needing fracturing. If the well is developed, a string fracturing multilayer can be carried out once by adopting a method of throwing balls and drilling sliding sleeves, the well temperature before and after fracturing needs to be tested for exploration wells and evaluation wells, liquid is drained for production, and the method of developing the well can be adopted. The existing multilayer fracturing process is high in labor intensity and long in construction period, and in the process of loading a pipe column, fracturing fluid sprayed out of an oil pipe pollutes the ground, so that the ground is not environment-friendly, and if 76.2 oil pipes are used, sand blockage can easily occur in the process of loading the pipe column.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a multi-layer fracturing setting tool structure with an immovable pipe column.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a multi-layer fracturing setting tool structure of a fixed pipe column, which comprises a main body, wherein a packer setting barrel is arranged at the top end of the main body, a safety joint is arranged at the bottom end of the packer setting barrel, a first fracturing layer is arranged at the bottom end of the safety joint, a Y541 packer is arranged at the top end inside a first pressure layer, a jar is arranged at the bottom end of the Y541 packer, a control switch is arranged at the bottom end of the jar, a combined fracturing layer is arranged at the bottom end of the first pressure layer, a Y341 packer is arranged at the top end inside the combined fracturing layer, a sliding sleeve sealer is arranged at the bottom end of the Y341 packer, and a combined control switch is arranged at the bottom end of the sliding sleeve sealer.
As a preferred technical scheme of the invention, the blanking plug setting cylinder comprises a blanking plug main body, a valve core is sleeved on the inner side of the blanking plug main body, shear pins are arranged on both sides of the valve core, an O-ring is sleeved on the outer side of the blanking plug main body, an anchor claw I is arranged on one side of the blanking plug main body, a positioning pin is arranged on the surface of one side of the anchor claw I, a locking nut is arranged on the other side of the anchor claw I, and a spring plate is arranged on the inner side of the anchor claw I.
As a preferred technical scheme of the present invention, an outer cylinder is sleeved on the outer side of the jar, an upper joint is arranged at one end of the outer cylinder, a locking screw is arranged on the outer cylinder, a piston body is arranged on the inner side of the outer cylinder, an inner mandrel is arranged on the inner side of the piston body, and a lower connecting end is arranged at one end of the inner mandrel.
As a preferred technical scheme of the invention, one end of the Y341 packer is provided with a joint, a sealing ring is arranged inside the joint, a central pipe is arranged inside the Y341 packer, a rubber cylinder is sleeved outside the central pipe, one end of the rubber cylinder is connected with a piston, one end of the piston is provided with a locking mechanism, the locking mechanism is provided with a setting shear pin, and one side of the locking mechanism is provided with a lower joint.
As a preferred technical scheme of the invention, one end of the Y541 packer is connected with an upper joint, the other end of the packer main body is provided with a piston, the piston is provided with a spring, one end of the piston is connected with a lower joint, one end of the lower joint is connected with a rubber cylinder, a rubber cylinder sleeve ring is arranged on the rubber cylinder, one end of the rubber cylinder sleeve ring is connected with a fluke II, the fluke II comprises a fluke upper connecting body and a fluke lower connecting body, the fluke upper connecting body is connected with the rubber cylinder, one end of the fluke lower connecting body is connected with a piston cylinder, a mandrel is arranged inside the piston cylinder, and one end of the mandrel is connected with a lower joint.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can realize the primary fracturing of a fixed pipe column on a plurality of layers, the liquid drainage and yield obtaining after the fracturing, and the well temperature measurement after the fracturing, so that the oil testing procedures are more closely connected, the soaking time of fracturing liquid on a reservoir is further shortened, the damage degree of the reservoir is reduced, the construction period is shortened, the single well is shortened in the fracturing time, the operation time of starting the fracturing pipe column and discharging the liquid pipe column is shortened, the operation cost is reduced, the labor intensity of workers is reduced, the green construction is realized, and the method has wide popularization and application prospect.
2. According to the invention, through improvement and perfection of the fracturing setting tool, the once multi-layer fracturing of the immobile pipe column is realized by using the sliding sleeve ball-throwing technology, the once large-thickness effective utilization of the ultra-low permeability reservoir is realized, an effective way is found for improving the single-well productivity, the construction period is greatly shortened, the construction success rate is obviously improved, and the investment scale is effectively controlled.
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 a schematic view of the plug setting barrel configuration of the present invention;
FIG. 3 is a schematic view of the jar of the present invention;
FIG. 4 is a schematic diagram of the structure of Y341 of the present invention;
FIG. 5 is a schematic view of the structure of Y541 of the present invention;
in the figure: 1. a main body; 2. setting a cylinder by using a blanking plug; 3. a safety joint; 4. a first fracturing layer; 5. assembling a fracturing layer; 6. a Y541 packer; 7. a jar; 8. a control switch; 9. a Y341 packer; 10. a sliding sleeve sealer; 11. a combination control switch; 12. a bottom switch; 13. an obturator body; 14. a valve core; 15. shearing the nails; 16. an O-shaped ring; 17. positioning pins; 18. a fluke I; 19. locking the nut; 20. a spring plate; 21. an outer cylinder; 22. an upper joint; 23. locking the screw; 24. a piston body; 25. an inner mandrel; 26. a lower connecting end; 27. a joint; 28. a seal ring; 29. a rubber cylinder; 30. a central tube; 31. a piston; 32. a locking mechanism; 33. setting the shear pin; 34. a lower joint; 38. a connector; 39. a spring; 40. a piston; 41. a lower connector; 42. a rubber cylinder; 43. a rubber sleeve ring; 44. an upper fluke connector; 45. a fluke II; 46. a fluke lower connector; 47. a piston cylinder; 48. a shaft core; 49. a lower rotary joint.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1
As shown in fig. 1-5, the invention provides a multi-layer fracturing setting tool structure of a fixed tubular column, which comprises a main body 1, wherein a packer setting barrel 2 is arranged at the top end of the main body 1, a safety joint 3 is arranged at the bottom end of the packer setting barrel 2, a first fracturing layer 4 is arranged at the bottom end of the safety joint 3, a Y541 packer 6 is arranged at the top end inside a first pressure layer 4, a jar 7 is arranged at the bottom end of the Y541 packer 6, a control switch 8 is arranged at the bottom end of the jar 7, a combined fracturing layer 5 is arranged at the bottom end of the first pressure layer 4, a Y341 packer 9 is arranged at the top end inside the combined fracturing layer 5, a sliding sleeve sealer 10 is arranged at the bottom end of the Y341 packer 9, and a combined control switch 11 is arranged at the bottom end of the sliding sleeve.
The blanking plug setting cylinder 2 comprises a blanking plug main body 13, a valve core 14 is sleeved on the inner side of the blanking plug main body 1, shear pins 15 are arranged on two sides of the valve core 14, an O-shaped ring 16 is sleeved on the outer side of the blanking plug main body 1, a fluke I18 is arranged on one side of the blanking plug main body 13, a positioning pin 17 is arranged on the surface of one side of a fluke I18, a locking nut 19 is arranged on the other side of the fluke I18, an elastic sheet 20 is arranged on the inner side of the fluke I18, and the blanking plug is mainly divided into a setting cylinder and; the seat sealing cylinder plays a role of seat clamping the blanking plug, namely the blanking plug cannot move downwards continuously or upwards after being in place; the blanking plug plays a role in plugging, anchoring and reopening a channel and comprises a main body, an anchor claw, a spring plate, a valve core and a shear pin sealing element.
The urceolus 21 has been cup jointed in the outside of jar 7, the one end of urceolus 21 is provided with top connection 22, be provided with locking screw 23 on the urceolus 21, the inboard of urceolus 21 is provided with piston body 24, the inboard of piston body 24 is provided with inner core axle 25, lower link 26 is installed to the one end of inner core axle 25, mainly used separate layer fracturing string, after jar arrived the design position down, when temperature and pressure change in the pit, the tubular column can take place flexible, the compensation of telescopic joint, improve the atress situation of packer and whole tubular column, make packer and oil pipe not receive the flexible influence of tubular column. And the packer is connected between two stages of packers, so that the deblocking load of the fracturing string is reduced.
One end of the Y341 packer 9 is provided with a joint 27, the inside of the joint 27 is provided with a sealing ring 28, the inside of the Y341 packer 9 is provided with a central pipe 30, the outer side of the central pipe 30 is sleeved with a rubber cylinder 29, one end of the rubber cylinder 29 is connected with a piston 31, one end of the piston 31 is provided with a locking mechanism 32, a setting shear pin 33 is arranged on the locking mechanism 32, one side of the locking mechanism 32 is provided with a lower joint 34, and the Y341 packer 9 is used for layered fracturing of oil and gas fields.
One end of the Y541 packer 6 is connected with an upper joint 38, the other end of the packer main body 6 is provided with a piston 40, the piston 40 is provided with a spring 39, one end of the piston 40 is connected with a lower connector 41, one end of the lower connector 41 is connected with a rubber sleeve 42, the rubber sleeve 42 is provided with a rubber sleeve ferrule 43, one end of the rubber sleeve ferrule 43 is connected with a fluke II45, the fluke II45 comprises a fluke upper connector 44 and a fluke lower connector 46, the fluke upper connector 44 is connected with the rubber sleeve 42, one end of the fluke lower connector 46 is connected with a piston cylinder 47, a mandrel 48 is arranged inside the piston cylinder 47, one end of the mandrel 48 is connected with a lower connector 49, and the Y341 packer 9 is used for layered fracturing of.
The specific working principle is as follows: and (4) assembling the tubular column according to a tubular column diagram, running the tubular column, and putting the setting sliding sleeve steel ball when the tubular column is lowered to a designed position. The oil pipe is pressurized to 18-20MPa, the packers Y341 and Y241 are set, the pressurization is continued until the pressure drops suddenly, the setting sliding sleeve is opened, the fracturing construction is carried out on the first layer after the sealing is tested to be qualified, the steel ball is thrown after the fracturing of the first layer is finished, the sliding sleeve sand blaster of the second layer is opened, the fracturing of the second layer is carried out, the seventh layer is opened by analogy in sequence, the sliding sleeve of the eighth layer until the required number of fracturing layers is opened, and the minimum diameter open flow is started after the fracturing is finished. When the well is required to be washed, liquid is pumped in from the casing pipe, the reverse circulation valve is opened, the well is circularly washed, after the process is completed, the pipe column is lifted, the packer is unsealed step by step, and the pipe column is taken out. The method is applicable to well conditions: the casing of the setting well section has no deformation, shrinkage, damage and the like, the setting position avoids a casing coupling, the setting depth is 1000-5000 meters, the temperature resistance is 200 ℃, and the one-way pressure difference is 90 MPa;
y541 packer: the packer is used for the layered fracturing of oil and gas fields, and has the main technical parameters as follows:
maximum outer diameter: Φ 114mm smallest internal diameter: phi 50mm
Working pressure: 90MPa seat seal pressure: 18-20MPa
Working temperature: 200 ℃ connecting thread: 2-7/8UPTBG, and the water-soluble polymer,
the working principle is as follows:
setting: the oil pipe is pressurized to push the piston, when the pressure reaches a certain value, the setting shear pin is sheared, the piston moves upwards to compress the rubber cylinder, the slip teeth are opened, the lock sleeve moving upwards is locked with the locking mechanism consisting of the locking ring, the locking ring limiting sleeve and the like, the rubber cylinder is kept in a compressed state, and the space of the sleeve is sealed.
And (4) deblocking, namely, lifting the oil pipe upwards, moving the central pipe upwards, shearing the deblocking shear pin, separating the slip teeth from the pipe wall, and restoring the rubber cylinder to the original position.
The packer supporting slips adopt a T-shaped groove guiding limiting telescopic sliding six-slip structure, and the operation is flexible and reliable; the clamping surface of the slip is embedded with hard alloy, and the rivet is reliable; the packer rubber cylinder adopts the imported hydrogenated butadiene-blue rubber, and other materials with high temperature resistance are added, so that the packer rubber cylinder can bear the temperature resistance of 150 ℃ and the pressure resistance of 70MPa when working underground, and is simple to operate, flexible and reliable;
y341 packer: the method is used for the layered fracturing of oil and gas fields;
main technical parameters of packer
Maximum outer diameter: Φ 114mm smallest internal diameter: phi 60mm
Working pressure: 90MPa seat seal pressure: 18-20MPa
Working temperature: 200 ℃ connecting thread: 2-7/8 UPTBG.
The working principle is as follows:
setting: when the oil pipe is pressurized to a certain value, the setting shear pin is cut off, the piston moves upwards to push the compression rubber sleeve, meanwhile, the locking mechanism is locked, and the packer setting is finished.
Well flushing: and (4) pressurizing by a sleeve pipe, and opening a well washing channel to communicate the oil sleeve. When the oil pressure is higher than the casing pressure, the backwash valve is closed.
Deblocking: and lifting the oil pipe, moving the central pipe upwards, shearing, unsealing and shearing the pin, and unsealing the packer.
The packer rubber cylinder adopts the imported hydrogenated butadiene-blue rubber, and other materials with high temperature resistance are added, so that the packer rubber cylinder can bear the temperature resistance of 200 ℃ and the pressure resistance of 90MPa when working underground, and is simple to operate, flexible and reliable;
setting a barrel by the blanking plug: the method is used for the layered fracturing of oil and gas fields;
main technical parameters of blanking plug
Maximum outer diameter: Φ 114mm working pressure: 90MPa
Working temperature: 200 ℃ connecting thread: 2-7/8 UPTBG.
The working principle is as follows:
the cost reduction and the efficiency improvement of the cased well are very obvious from the development of past single-layer fracturing to multi-layer fracturing, but the multi-layer fracturing mostly uses Y series packers, has the advantages of being suitable for multi-layer high-pressure fracturing operation, and has the defect that the packer cannot be unset immediately after fracturing, and a tubular column needs to be lifted up for unsetting, so that the risk of sand blockage caused by blowout and sand production exists. The novel scheme is provided for solving the problem, the low-cost operation process with pressure is adopted, namely after fracturing is completed, blowout pressure is controlled to be reduced to a certain degree, a controllable packer is thrown to plug an oil pipe, an oil pipe lifting fracturing tool is used for deblocking a tool to be subjected to fracturing well section overpressure, the packer is reopened to continue blowout from the oil pipe, and therefore the risk of sand blocking caused by sand falling on the tool due to low stratum energy in the later period of blowout can be avoided.
The blanking plug is characterized in that: the controllable blanking plug is mainly divided into a sealing cylinder and a blanking plug; the seat sealing cylinder plays a role of seat clamping the blanking plug, namely the blanking plug cannot move downwards continuously or upwards after being in place; the blanking plug plays a role in plugging, anchoring and reopening a channel and comprises a main body, an anchor claw, a spring plate, a valve core, a shear pin sealing element and the like. The operation is simple, flexible and reliable;
safety joint
Main technical parameters of safety joint
Maximum outer diameter: Φ 114mm smallest internal diameter: phi 60mm
Working pressure: working temperature of 90 MPa: 200 deg.C
Connecting threads: 2-7/8UPTBG
The tool is mainly used for throwing the tool in the well once the tool is stuck in the well and cannot be normally unsealed, and the whole upper pipe column is lifted, so that the subsequent well repairing operation procedure is simplified.
The working principle is as follows: the series of products are used on the upper parts of tools such as a packer and the like, and if accidents such as jamming and the like of a pipe column occur, a ball can be thrown, a shear pin is cut off by pressing, a sliding sleeve descends, then forward rotation tripping is carried out, and the pipe column is lifted up to realize releasing. Has the advantages of simple structure, convenient application, etc.;
the use of the jar: mainly used for separate layer fracturing string
The working principle is as follows: after the jar hits the design position down, when temperature and pressure change in the pit, the tubular column can take place to stretch out and draw back, and the compensation effect of telescopic joint improves the atress situation of packer and whole tubular column, makes packer and oil pipe not receive the flexible influence of tubular column. And the packer is connected between two stages of packers, so that the deblocking load of the fracturing string is reduced.
The jar is characterized in that: and free telescopic compensation is adopted, so that the device is convenient to apply. The central pipe adopts a special structure, can transmit torque, and can be matched with a mechanical packer for use;
in the construction process, the construction derrick is more than 80T, and the performance of matched construction equipment is good.
1. And the oil pipe with the diameter of 73mm is used for drifting and scraping processes.
2. One phi 116mmx2mm drift gauge and one phi 139.7mm casing scraper.
3. The fracturing wellhead hanger is lifted by one short circuit.
4. Prepare phi 89mmN80 external thickening oil pipe adjusting short section (1-2 each of 1 meter, 1.5 meters and 2 meters)
5. Phi 89mmN80 external thickened tubing.
6. Phi 73mmN80 new thick oil pipes and 2m short joints are respectively arranged at 1.
7. A downhole tool is fractured in layers.
8. Fracturing wellhead set
9. And (5) checking the distribution condition of the adjacent casing couplings at the checkpoint.
Construction step
1. In the same well: and (3) drifting the well with a phi 116mmX2m drift gauge to the bottom of the artificial well, and repeatedly drifting 3-5 times at a stuck point of + -5 m.
2. Scraping and replacing the shaft: and (5) descending a 139.7mm sleeve scraper to the bottom of the artificial well, and repeatedly scraping 3-5 times at a stuck point of + -5 m. Then the well is back-washed with active water down to the bottom of the artificial well.
3. Preparing a tubular column and lowering the tubular column: and the well is cleaned for one week in a positive circulation mode after the tool is in place.
4. And (5) depth correction and tubular column adjustment.
5. Setting and checking.
6. And (5) installing a fixed wellhead.
7. And (3) fracturing: and performing construction fracturing according to the construction design.
8. Open flow: and after fracturing is finished, performing open-flow liquid drainage according to the design requirement of a fracturing process.
9. Deblocking: after the open flow is finished, the positive circulation degassing is firstly carried out, and then the well is fully and reversely washed and then is unsealed.
10. Fracturing emergency condition:
A. and if sand blockage occurs when the first target layer is fractured, immediately stopping the pump. Quickly controlling open flow and well washing; cutting and forcibly extruding; and then whether the sliding sleeve is opened to fracture a second target zone under the condition of not moving the tubular column is determined according to the actual condition.
B. And if sand blockage occurs at the upper fracturing layer, immediately stopping the pump. And immediately and quickly controlling blowout and backwashing the well to wash out all sand liquid in the underground oil pipe.
Construction requirements and considerations
1 carefully carry out the pit shaft preparation process of drifting, scraping, well washing, avoid packer tubular column card to hinder and the damage of packer packing element.
2. The measuring before the clamping pipe column is put into the well is accurate, the screw thread is cleaned by diesel oil and a steel wire brush, if an unqualified oil pipe exists, the screw thread of the oil pipe which is put into the well is coated with sealing grease, a sealing belt is wound, and hydraulic pliers are used for screwing up according to the specified torque of the related screw thread.
3. And (4) making a back-up tong upper buckle, preventing the packer from being set midway, lowering the fracturing string at a constant speed, controlling the pipe lowering speed to be 25 pieces/h, if the pressure is not more than 30KN when meeting the resistance, and informing the field supervision to take measures.
4. After the packer is pressed and cracked, back tongs must be made during the tripping process, so that the packer is prevented from tripping and falling into the well.
5. And fracturing the first target layer, and replacing after the fracturing sand adding process is finished, wherein the replacing liquid amount is not less than 1.5-2m3, so that the condition that the sliding sleeve cannot be opened due to sand blocking is avoided.
6. And fracturing the second target layer, and replacing after the fracturing sand adding process is finished, wherein the replacing liquid amount is not less than 1.5-2m3, so that the condition that the sliding sleeve cannot be opened due to sand blocking is avoided.
7. Other safety measures are related to regulations and fracturing process design implementation.
The invention can realize the one-time fracturing of a plurality of layers by the immobile pipe column, the liquid discharge yield after the fracturing and the well temperature measurement after the fracturing, so that the oil testing procedures are more closely connected, further shortening the soaking time of the fracturing fluid on the reservoir, reducing the damage degree of the reservoir, shortening the construction period, shortening the fracturing time of a single well, shortening the operation time of a fracturing string starting pipe column and a lower drainage pipe column, reducing the operation cost, lightening the labor intensity of workers, realizing green construction, having wide popularization and application prospects, realizing one-time multi-layer-section fracturing of a fixed pipe column by improving and perfecting a fracturing setting tool and applying a sliding sleeve ball throwing technology, realizing the effective utilization of one-time large thickness of an ultra-low permeability reservoir, and finding an effective way for improving the single-well productivity, meanwhile, the construction period is greatly shortened, the construction success rate is obviously improved, and the investment scale is effectively controlled.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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.
Claims (5)
1. A multi-layer fracturing setting tool structure with a fixed pipe column comprises a main body (1) and is characterized in that, the top end of the main body (1) is provided with a blanking plug setting cylinder (2), the bottom end of the blanking plug setting cylinder (2) is provided with a safety joint (3), the bottom end of the safety joint (3) is provided with a first fracturing layer (4), the top end inside the first pressure layer (4) is provided with a Y541 packer (6), the bottom end of the Y541 packer (6) is provided with a jar knocker (7), the bottom end of the jar (7) is provided with a control switch (8), the bottom end of the first pressure layer (4) is provided with a combined fracturing layer (5), the top end of the inside of the combined fracturing layer (5) is provided with a Y341 packer (9), the bottom end of the Y341 packer (9) is provided with a sliding sleeve sealer (10), and a combined control switch (11) is arranged at the bottom end of the sliding sleeve sealer (10).
2. The structure of the multi-layer fracturing setting tool with the fixed string as claimed in claim 1, wherein the setting cylinder (2) comprises a main body (13) of the blanking plug, a valve core (14) is sleeved on the inner side of the main body (1) of the blanking plug, shear pins (15) are arranged on both sides of the valve core (14), an O-shaped ring (16) is sleeved on the outer side of the main body (1) of the blanking plug, a fluke I (18) is arranged on one side of the main body (13), a positioning pin (17) is arranged on one side surface of the fluke I (18), a locking nut (19) is arranged on the other side of the fluke I (18), and a spring plate (20) is arranged on the inner side of the fluke I (18).
3. The structure of the multi-layer fracturing setting tool with the fixed string as claimed in claim 1, wherein an outer cylinder (21) is sleeved on the outer side of the jar (7), an upper joint (22) is arranged at one end of the outer cylinder (21), a locking screw (23) is arranged on the outer cylinder (21), a piston body (24) is arranged on the inner side of the outer cylinder (21), an inner mandrel (25) is arranged on the inner side of the piston body (24), and a lower connecting end (26) is arranged at one end of the inner mandrel (25).
4. The structure of claim 1, wherein a joint (27) is arranged at one end of the Y341 packer (9), a sealing ring (28) is arranged inside the joint (27), a central pipe (30) is arranged inside the Y341 packer (9), a rubber sleeve (29) is sleeved outside the central pipe (30), a piston (31) is connected to one end of the rubber sleeve (29), a locking mechanism (32) is arranged at one end of the piston (31), a setting shear pin (33) is arranged on the locking mechanism (32), and a lower joint (34) is arranged on one side of the locking mechanism (32).
5. The structure of claim 1, wherein one end of the Y541 packer (6) is connected with an upper joint (38), the other end of the packer main body (6) is provided with a piston (40), the piston (40) is provided with a spring (39), one end of the piston (40) is connected with a lower joint (41), one end of the lower joint (41) is connected with a rubber sleeve (42), the rubber sleeve (42) is provided with a rubber sleeve ring (43), one end of the rubber sleeve ring (43) is connected with a fluke II (45), the fluke II (45) comprises a fluke upper connector (44) and a fluke lower connector (46), the fluke upper connector (44) is connected with the rubber sleeve (42), one end of the fluke lower connector (46) is connected with a piston cylinder (47), and a mandrel (48) is arranged inside the piston cylinder (47), one end of the mandrel (48) is connected with a lower rotary joint (49).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313914.5A CN112211588A (en) | 2020-11-20 | 2020-11-20 | Multi-layer fracturing setting tool structure with fixed pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313914.5A CN112211588A (en) | 2020-11-20 | 2020-11-20 | Multi-layer fracturing setting tool structure with fixed pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112211588A true CN112211588A (en) | 2021-01-12 |
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ID=74067939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011313914.5A Withdrawn CN112211588A (en) | 2020-11-20 | 2020-11-20 | Multi-layer fracturing setting tool structure with fixed pipe column |
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| Country | Link |
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| CN (1) | CN112211588A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117365316A (en) * | 2023-11-30 | 2024-01-09 | 大庆信辰油田技术服务有限公司 | Multilayer drainage and production pipe column for gas well |
-
2020
- 2020-11-20 CN CN202011313914.5A patent/CN112211588A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117365316A (en) * | 2023-11-30 | 2024-01-09 | 大庆信辰油田技术服务有限公司 | Multilayer drainage and production pipe column for gas well |
| CN117365316B (en) * | 2023-11-30 | 2024-02-06 | 大庆信辰油田技术服务有限公司 | Multilayer drainage and production pipe column for gas well |
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Application publication date: 20210112 |
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