CN116378597B - Packer based on well cementation technology and working method thereof - Google Patents
Packer based on well cementation technology and working method thereof Download PDFInfo
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- CN116378597B CN116378597B CN202310664516.5A CN202310664516A CN116378597B CN 116378597 B CN116378597 B CN 116378597B CN 202310664516 A CN202310664516 A CN 202310664516A CN 116378597 B CN116378597 B CN 116378597B
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- sleeve
- ring
- air cavity
- movable claw
- connecting hose
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- 238000000034 method Methods 0.000 title claims abstract description 85
- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- 210000000078 claw Anatomy 0.000 claims description 79
- 239000007789 gas Substances 0.000 claims description 34
- 230000009471 action Effects 0.000 claims description 32
- 230000008569 process Effects 0.000 claims description 24
- 238000010008 shearing Methods 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 17
- 238000004458 analytical method Methods 0.000 claims description 15
- 238000004873 anchoring Methods 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 claims description 6
- 239000002243 precursor Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 description 18
- 238000012856 packing Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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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
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
-
- 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
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a packer based on well cementation technology and a working method thereof, and relates to the technical field of well cementation engineering.
Description
Technical Field
The invention relates to the technical field of well cementation engineering, in particular to a packer based on well cementation technology and a working method thereof.
Background
The packer is connected to the underground pipe column and is used for sealing and isolating an oil pipe, an oil gas well sleeve or an open hole well wall annular space, a production layer or a construction target layer, and preventing inter-layer fluid and pressure from interfering with each other, and the principle is as follows: the high-pressure liquid is injected into the rubber cylinder to act on the inside of the rubber cylinder along the pressure transmission hole in the rubber cylinder, the rubber cylinder expands to seal an oil separation sleeve annulus under the action of throttling pressure difference, and after the oil pressure is released, the rubber cylinder is retracted to be original state by the resilience force of the rubber cylinder to realize deblocking, and the packer applied to well cementation operation is used as an external pipe packer to avoid formation fluid channeling caused by drilling fluid channeling and micro-gaps; for the currently used packer, the rubber barrel which is extruded and deformed is fully expanded and attached to the inner wall of the oil sleeve, so that the effect of fully sealing and packing is achieved, but in the actual use process, the extrusion deformation amount of the rubber barrel and the moving range of the slips are mainly related to the oil pressure and the oil pressure release time, and the concrete steps are as follows: in order to improve the tightness, the rubber cylinder needs to be fully deformed and attached to the inner wall of the oil pipe, but in the process, the deformation of the rubber cylinder is improved, the moving range of the slips is increased, so that the slips are damaged, such as slip position sliding, incapability of normal resetting and the like, or the slips are overtravel to cause damage to the oil pipe, and the like, and when the moving range of the slips is relatively smaller, the rubber cylinder is difficult to be tightly attached to the sleeve wall of the oil pipe, so that the integral tightness is affected.
Disclosure of Invention
The invention aims to provide a packer based on a well cementation technology and a working method thereof, which are used for solving the problem that the slip is damaged or the glue barrel is difficult to be tightly attached to the wall of an oil pipe sleeve due to the mutual influence of the movable range of the slip and the deformation of the glue barrel in the actual use process of the packer applied to the well cementation operation.
The aim of the invention can be achieved by the following technical scheme: the packer based on the well cementation technology comprises a top section sleeve, a rubber sleeve ring, a conical sleeve, a centralizing sleeve, an anchoring sleeve and an oil pipe empty sleeve, wherein the top section sleeve, the rubber sleeve ring, the conical sleeve, the centralizing sleeve and the anchoring sleeve are sequentially arranged on the oil pipe empty sleeve along the direction from top to bottom, four slip push blocks and centralizing rings are respectively arranged on the upper end and the lower side circumferential outer wall of the centralizing sleeve, the four slip push blocks and the centralizing rings are arranged in an annular array along the center point of the centralizing sleeve, locking rings are arranged outside the four slip push blocks, movable claw rings are arranged on the upper part of the circumferential outer wall of the conical sleeve, the lower part of the circumferential outer wall of the conical sleeve is in an inverted truncated cone shape, and the lower part of the circumferential outer wall of the conical sleeve is matched with the inner curved surfaces of the four slip push blocks; the movable claw ring is in sliding connection on the circumferential outer wall of the conical sleeve, four lower claw frames are arranged at the lower side of the movable claw ring, the four lower claw frames are arranged in an annular array along the center point of the movable claw ring, the lower claw frames are arranged in an intersecting mode with the slip push blocks, an auxiliary air rubber cushion block is arranged at the lower side of the lower claw frames, a first air cavity is formed in the auxiliary air rubber cushion block, a connecting hose is arranged on the auxiliary air rubber cushion block, the tail end of the connecting hose is communicated with the first air cavity, the connecting hose extends upwards and penetrates through the upper end of the rubber sleeve, a gas pressure sensor is arranged at the initial end of the connecting hose, a second air cavity is formed in the rubber sleeve, the second air cavity is communicated with the first air cavity through the connecting hose, and a stop structure corresponding to the connecting hose is arranged at the position between the conical sleeve and the movable claw ring.
Further provided is that: the cross section of the second air cavity is in a bidirectional saw-tooth shape.
Further provided is that: the radial distance between the tail end of the auxiliary air rubber pad block and the top end of the lower claw frame is larger than the radial distance between the top end of the slip pushing block and the upper surface of the centralizing sleeve, and the setting position of the lower end of the auxiliary air rubber pad block is lower than the setting position of the lower end of the lower claw frame.
Further provided is that: the conical sleeve is characterized in that a directional chute corresponding to the lower claw frame is formed in the circumferential outer wall of the conical sleeve, a stop gap is formed between the upper surface of the movable claw ring and the top end position of the directional chute, and the stop structure is arranged in the stop gap; four shearing pins are arranged at the upper end of the circumferential outer wall of the movable claw ring, the four shearing pins are arranged in an annular array along the center point of the movable claw ring, and the tail ends of the shearing pins penetrate through the movable claw ring and extend into the outer wall of the conical sleeve.
Further provided is that: and the circumferential outer walls of the conical sleeve and the top section sleeve are provided with guide pipe grooves corresponding to the connecting hoses.
Further provided is that: the stop structure comprises inner lock knot buckles and shearing pins, the setting number of the inner lock knot buckles is equal to that of the connecting hose, the setting positions of the inner lock knot buckles correspond to those of the connecting hose, the upper end and the lower end of the inner lock knot buckles are respectively arranged on the upper side and the lower side of a stop gap, the cross section of the inner lock knot buckles is arc-shaped and curved, the bending direction of the inner lock knot points to the center point position of the movable claw ring, and the outer wall position, close to the center point position of the movable claw ring, of the inner lock knot buckles is provided with a pipe pressing groove corresponding to the connecting hose.
The working method of the packer based on the well cementation technology comprises the following specific modes of the packer in the using process: the working method comprises the following steps: setting the packer in the well to execute setting action, and under the condition of stable pressure, the conical sleeve moves downwards until contacting the slip pushing block to make the slip pushing block move outwards to complete anchoring action, and the top section sleeve in the state continuously moves downwards and extrudes the rubber sleeve ring to deform to complete sealing action; the working method is as follows: in the first working method, the method comprises three parts of precursor parameter presetting, parameter acquisition analysis and external parameter modeling control, and the method specifically comprises the following steps: presetting a precursor parameter: firstly, injecting inert gas into a first air cavity and a second air cavity through a connecting hose, detecting total air pressure Pi in the first air cavity and the second air cavity through a gas pressure sensor, wherein a shearing pin in the state is in an unbroken state, and a movable claw ring is fixed on a conical sleeve; parameter acquisition and analysis: in the downward moving process of the conical sleeve, the auxiliary air rubber cushion block is firstly contacted with the upper surface position of the centralizing sleeve and is subjected to compression deformation, so that the volume of a first air cavity in the auxiliary air rubber cushion block is reduced, inert gas in the first air cavity is filled into a second air cavity until the auxiliary air rubber cushion block is in a completely compressed state, the volume of the first air cavity is zero, when the conical sleeve continuously moves downward, upward reaction force is generated on the movable claw ring, a shearing pin is cut off, the movable claw ring moves upward, the ventilation state of a connecting hose in a cut-off gap is cut off through a cut-off structure, the state is maintained until the rubber cylinder ring is in a state of being extruded and deformed, the pressure value Pi displayed on each gas pressure sensor is recorded, and the pressure value is analyzed and processed; parameter modeling control: the pressure value detected by the gas pressure sensor in the calibration parameter acquisition analysis is Pi ∈, a line graph is built, wherein the X coordinate axis of the line graph is calibrated to be the setting action time, and the Z coordinate axis in the line graph comprises the pressure value Pi ∈ and the output gas pressure in the setting actionIn which the output gas is in setting actionPressure->The starting point of the (E) is marked as P ≡; the working method is as follows: in the parameter acquisition analysis in the working method II, the radial distance between the lower surface of the calibration auxiliary air rubber pad block and the upper surface of the centralizing sleeve is La, the total length of the rubber sleeve ring is Lb, the total volume of the first air cavity is Va, and the total volume of the second air cavity is Vb, wherein ∈>Pi is inversely proportional to the sum of the volumes of the first air cavity and the second air cavity and is combined with the parameters acquired in the parameter acquisition analysis to establish +.>The method comprises the steps of carrying out a first treatment on the surface of the The working method is as follows: in the third working method, pi ∈r is the actual detection value of the gas pressure sensor, and when the auxiliary gas-gel cushion block and the rubber cylinder ring are compressed, the values of Va and Vb are reduced, pi ∈r > Pi, and in the initial state, pi=pi ∈r, referring to ∈r>Calculating to obtain->The method comprises the following steps that (1) P ∈ is marked as a pre-pressing stage, when P ∈ is continuously input, pi ∈ is larger than Pi, a line graph of Pi ∈ is in a continuous rising trend, in the rising process, the line graph of Pi ∈ is in a state of tending to be horizontal, the line graph is marked as a two-pressing stage, in the two-pressing stage, an auxiliary air-glue cushion block is compressed to the maximum deformation amount, va in a calculation formula of Pi ∈ is equal to 0, a movable claw ring is subjected to upward stress, a shearing pin is broken by the stress, the movable claw ring moves upwards to the uppermost position of a directional chute, a connecting hose in a cut-off gap is cut off by a cut-off structure, a slip pushing block is outwards expanded to the maximum distance, and anchoring action is completed; the working method is as follows: after the working method IV is completed, the rubber cylinder ring is subjected to compression deformation and compression, and is calibrated as a sealing stage, wherein in the sealing stage, the pressure value reflected by the value displayed by Pi ∈is the pressure value in the second air cavity, and is substituted into the Pi ∈line diagram in the working method IVThe pressure value in a state of tending to be horizontal is recalculated to obtain +.>To retrieve->And executing the working method four again as the actual output air pressure in the setting state to obtain a Pi ∈, obtaining a real-time numerical value with the Pi ∈higher than that displayed in the two-pressure stage, and enabling the Pi ∈in the sealing stage to be horizontal after the packing element ring is compressed to the maximum deformation amount so as to complete the whole setting action.
The invention has the following beneficial effects: 1. the packer is characterized in that a movable claw ring is additionally arranged between a conical sleeve and a centralizing sleeve, an auxiliary gas gel cushion block is additionally arranged on the movable claw ring, the auxiliary gas gel cushion block firstly contacts with the conical surface at the lower side of the conical sleeve to centralizing sleeve, extrusion deformation of the auxiliary gas gel cushion block is caused, then the first gas cavity therein generates volume change, according to a Krebr Long Lixiang equation, the volume is inversely proportional to the pressure in a closed space, so that a pressure line diagram between the auxiliary gas gel cushion block and the rubber sleeve ring is established, when the packer performs a well-descending action, the pressure value is acquired outside the well in real time, the movable range of a slip pushing block can be directly fed back and displayed, and the purpose of the packer can be visually displayed on the outside; 2. in combination with the above, through addding between movable claw ring and toper sleeve pipe and stopping the structure, its purpose is after supplementary gas cushion piece reaches the biggest compression deformation volume, through stopping being arranged in the connecting hose that stops the clearance to the supplementary gas cushion piece that is compressed completely carries out "lock to toper sleeve pipe and dies", and its purpose is to avoid toper sleeve pipe to last to move down and lead to the slips ejector pad to appear the problem of overstroke.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a packer based on the well cementing technique according to the present invention;
FIG. 2 is a split view of FIG. 1 in a packer based on the well cementing technique of the present invention;
FIG. 3 is a schematic diagram of a moveable jaw ring component in a packer based on the well cementing technique;
FIG. 4 is a schematic view of the construction of a tapered casing component in a packer based on the cementing technique of the present invention;
FIG. 5 is a partial cutaway view of a moveable jaw ring component in a packer based on the cementing technique of the present invention;
FIG. 6 is a cross-sectional view of a packing element ring component in a packer based on the cementing technique of the present invention;
FIG. 7 is a line graph of a method of operating a packer based on the cementing technique of the present invention.
In the figure: 1. a gas pressure sensor; 2. a connecting hose; 3. a top section sleeve; 4. a rubber cylinder ring; 5. a conical sleeve; 6. a moveable claw ring; 7. centralizing the casing; 8. anchoring the sleeve; 9. oil pipe empty sleeve; 10. slip pushing blocks; 11. a capture ring; 12. centralizing the ring; 13. an inner lock joint buckle; 14. shearing pins; 15. a lower claw holder; 16. auxiliary air glue cushion blocks; 17. a pipe pressing groove; 18. a conduit groove; 19. a directional chute; 20. a first air chamber; 21. and a second air cavity.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one: for the packer used in the current well cementation engineering, the corresponding movement of each component in the packer is realized mainly by means of pressurizing equipment outside a well, and in the invention, the downward movement of the conical sleeve and the top section sleeve is mainly embodied, so that the slip pushing block is driven to move and the compression deformation of the rubber sleeve ring is driven, and the moving process of other parts of the packer is not repeated in the invention, but the description is that: in order to improve the leakproofness, just need the packing element fully to warp and apply on oil pipe inner wall position, but in this process, when improving packing element deflection, the range of motion increase of slips causes the slips to be impaired, like slip position slip, unable normal reset etc. or slip overstroke leads to the impaired scheduling problem of oil pipe, and the range of motion of slips is less relatively, can lead to being difficult to closely laminating between packing element and the oil pipe mantle wall, then influences whole leakproofness, has proposed following technical scheme for this reason: referring to fig. 1-6, a packer based on a well cementation technology in this embodiment includes a top section sleeve 3, a packing element ring 4, a conical sleeve 5, a centralizing sleeve 7, an anchoring sleeve 8 and an oil pipe empty sleeve 9, the top section sleeve 3, the packing element ring 4, the conical sleeve 5, the centralizing sleeve 7 and the anchoring sleeve 8 are sequentially arranged on the oil pipe empty sleeve 9 along the direction from top to bottom, four slip pushing blocks 10 and centralizing rings 12 are respectively arranged on the upper end and the lower side circumferential outer wall of the centralizing sleeve 7, the four slip pushing blocks 10 and the centralizing rings 12 are arranged in an annular array along the center point of the centralizing sleeve 7, locking rings 11 are arranged outside the four slip pushing blocks 10, a movable claw ring 6 is arranged on the upper part of the circumferential outer wall of the conical sleeve 5, the lower side part of the circumferential outer wall of the conical sleeve 5 is in a reverse truncated cone shape, and the lower side part of the circumferential outer wall of the conical sleeve 5 is matched with the inner curved surfaces of the four slip pushing blocks 10; the movable claw ring 6 is in sliding connection on the circumferential outer wall of the conical sleeve 5, four lower claw frames 15 are arranged at the lower side of the movable claw ring 6, the four lower claw frames 15 are arranged in an annular array along the center point of the movable claw ring 6, the lower claw frames 15 and the slip pushing blocks 10 are arranged in an intersecting mode, an auxiliary air glue cushion block 16 is arranged at the lower side of the lower claw frames 15, a first air cavity 20 is arranged in the auxiliary air glue cushion block 16, a connecting hose 2 is arranged on the auxiliary air glue cushion block 16, the tail end of the connecting hose 2 is communicated with the first air cavity 20, the connecting hose 2 extends upwards and penetrates to the upper end of the rubber sleeve ring 4, a gas pressure sensor 1 is arranged at the initial end position of the connecting hose 2, a second air cavity 21 is arranged inside the rubber sleeve ring 4, the second air cavity 21 is communicated with the first air cavity 20 through the connecting hose 2, a stop structure corresponding to the connecting hose 2 is arranged at the position between the conical sleeve 5 and the movable claw ring 6, the cross section of the second air cavity 21 is in a bidirectional saw-tooth shape, and a conduit 18 corresponding to the connecting hose 2 is arranged on the circumferential outer wall of the conical sleeve 5 and the top joint sleeve 3.
Working principle: referring to fig. 2, the packer mentioned in the present invention differs from the current packer construction in that: a movable claw ring 6 is additionally arranged between the conical sleeve 5 and the centralizing sleeve 7, wherein four auxiliary air glue cushion blocks 16 are additionally arranged at the lower side of the movable claw ring 6, and the following needs to be described: the four auxiliary air glue cushion blocks 16 are staggered with the slip pushing block 10, so that the auxiliary air glue cushion blocks 16 are prevented from interfering the moving process of the slip pushing block 10; in addition, a connecting hose 2 is connected between each auxiliary air rubber cushion block 16 and the rubber cylinder ring 4, and inert gas is injected into the first air cavity 20 and the second air cavity 21 to enable certain pressure exists inside the auxiliary air rubber cushion blocks 16 and the rubber cylinder ring 4; when the setting action is carried out, the conical sleeve 5 moves downwards and drives the slip push block 10 to expand, the auxiliary air glue cushion block 16 is in a compressed deformation state, according to the Kearab Long Lixiang equation, a closed space can be obtained, when the closed space deforms to reduce the volume, the pressure is increased, and the basic principle of the invention is that the moving process of the slip push block 10 is displayed in a feedback mode by detecting the actual pressure change, and the pressure change is taken as a measurement standard.
Embodiment two: the embodiment optimizes the integral structure of the movable claw ring in the first embodiment, and aims to match the movement of the slip pushing block and assist the compression deformation process of the air glue cushion block, and the method specifically comprises the following steps: the radial distance from the tail end of the auxiliary air rubber cushion block 16 to the top end of the lower claw frame 15 is larger than the radial distance from the top end of the slip push block 10 to the upper surface of the centralizing sleeve 7, the setting position of the lower end of the auxiliary air rubber cushion block 16 is lower than the setting position of the lower end of the lower claw frame 15, the circumferential outer wall of the conical sleeve 5 is provided with a directional chute 19 corresponding to the lower claw frame 15, a stop gap is arranged between the upper surface of the movable claw ring 6 and the top end position of the directional chute 19, and the stop structure is arranged in the stop gap; the upper end of the circumference outer wall of the movable claw ring 6 is provided with four shearing pins 14, the four shearing pins 14 are arranged in an annular array along the center point of the movable claw ring 6, the tail ends of the shearing pins 14 penetrate through the movable claw ring 6 and extend into the outer wall of the conical sleeve 5, the stop structure comprises inner lock knot buckles 13 and shearing pins 14, the number of the inner lock knot buckles 13 is equal to the number of the connecting hoses 2, the setting positions of the inner lock knot buckles 13 correspond to the connecting hoses 2, the upper end and the lower end of the inner lock knot buckles 13 are respectively arranged on the upper side and the lower side of a stop gap, the cross section of the inner lock knot buckles 13 are arc-shaped, the bending direction of the inner lock knot buckles 13 points to the center point position of the movable claw ring 6, and pipe pressing grooves 17 corresponding to the connecting hoses 2 are formed in the outer wall positions of the inner lock knot buckles 13, which are close to the center point position of the movable claw ring 6.
The advantages are that: referring to fig. 3 and 4, in the initial state, the moveable jaw ring 6 is "fixed" to the tapered sleeve 5 by the shear pin 14, so that in the initial state, the moveable jaw ring 6 moves down synchronously with the tapered sleeve 5, but further limits the "radial distance between the end of the auxiliary air glue cushion block 16 and the top end of the lower jaw frame 15 to be greater than the radial distance between the top end of the slip pusher block 10 and the upper surface of the centralizing sleeve 7", the purpose of which is: the auxiliary air glue cushion block 16 is contacted with the centralizing sleeve 7 and is sent to deform; as shown in the first embodiment, when the auxiliary air cushion block 16 is compressed to the maximum deformation amount, the movable claw ring 6 receives the reaction force from the centralizing sleeve 7, the generated stress is large enough and the shearing pin 14 is broken, at this time, the movable claw ring 6 moves upwards to the uppermost position of the directional chute 19, in the process, the auxiliary air cushion block 16 is primarily deformed, but the movable claw ring 6 still keeps a state of moving downwards synchronously with the conical sleeve 5 when moving to the uppermost position of the directional chute 19, and each inner lock knot 13 bends towards the position close to the connecting hose 2, so that the connecting hose 2 part in the cut-off gap is cut off, the first air cavity 20 and the second air cavity 21 are not communicated any more, the conical sleeve 5 cannot move downwards due to the fact that the auxiliary air cushion block 16 completely compresses and deforms, and damage to the slip push block 10 or damage to a well is avoided; finally, the packing element ring 4 is extruded and deformed by the top section sleeve 3, and the sealing action is completed.
Embodiment III: the present embodiment is summarized in the first embodiment and the second embodiment, and is mainly used for describing the working process of the packer in the present invention, and specifically includes the following steps: referring to fig. 7, in the use process of the packer in this embodiment, the method includes the following working steps: the working method comprises the following steps: setting the packer in the designed depth position of the well, executing setting action, under the condition of stable pressure, moving the conical sleeve 5 downwards until the conical sleeve contacts the slip push block 10, enabling the slip push block 10 to move outwards to finish anchoring action, continuously moving the top section sleeve 3 downwards in the state, extruding the rubber sleeve ring 4 to deform, and finishing sealing action; the working method is as follows: in the first working method, the method comprises three parts of precursor parameter presetting, parameter acquisition analysis and external parameter modeling control, and the method specifically comprises the following steps: presetting a precursor parameter: firstly, inert gas is injected into a first gas cavity 20 and a second gas cavity 21 through a connecting hose 2, and the total gas pressure Pi in the first gas cavity 20 and the second gas cavity 21 is detected by a gas pressure sensor 1, a shearing pin 14 in the state is in an unbroken state, and a movable claw ring 6 is fixed on a conical sleeve 5; parameter acquisition and analysis: in the downward moving process of the conical sleeve 5, the auxiliary air rubber cushion block 16 firstly contacts the upper surface position of the centralizing sleeve 7 and generates compression deformation, so that the volume of a first air cavity 20 in the auxiliary air rubber cushion block 16 is reduced, inert gas in the first air cavity 20 is filled into a second air cavity 21 until the auxiliary air rubber cushion block 16 is in a completely compressed state, the volume of the first air cavity 20 is zero, when the conical sleeve 5 continuously moves downward, upward reaction force is generated on the movable claw ring 6, the shearing pin 14 is cut off, the movable claw ring 6 moves upward, the ventilation state of a connecting hose 2 in a cut-off gap is cut off through a cut-off structure, the state is maintained until the rubber cylinder ring 4 is in an extruded deformation state, the pressure value Pi displayed on each gas pressure sensor 1 is recorded, and the pressure value is analyzed; parameter modeling control: the pressure value detected by the gas pressure sensor 1 in the calibration parameter acquisition analysis is Pi ∈, and a line diagram is built, whereinThe X axis of the line graph is marked as the setting action time, wherein the Z axis in the line graph comprises a pressure value Pi ∈ and the output air pressure in the setting actionWherein the output air pressure in the setting action +.>The starting point of the (E) is marked as P ≡; the working method is as follows: in the parameter acquisition analysis in the second working method, the radial distance between the lower surface of the calibration auxiliary air rubber pad block 16 and the upper surface of the centralizing sleeve 7 is La, the total length of the rubber sleeve ring 4 is Lb, the total volume of the first air cavity 20 is Va, and the total volume of the second air cavity 21 is Vb, wherein ∈>Pi is inversely proportional to the sum of the volumes of the first air cavity 20 and the second air cavity 21 and is combined with the parameters acquired in the parameter acquisition analysis to establish +.>The method comprises the steps of carrying out a first treatment on the surface of the The working method is as follows: in the third working method, pi ∈r is the actual detection value of the gas pressure sensor 1, and when the auxiliary air-glue cushion block 16 and the glue cylinder ring 4 are compressed, the values of Va and Vb are reduced, pi ∈r > Pi, and in the initial state, pi=pi ∈r, refer to ∈r>Calculating to obtain->When P ∈r is continuously input, pi ∈r > Pi, pi ∈r is continuously rising, and in the rising process, pi ∈r is in a state of being horizontal, and is marked as a pre-pressing stage, and in the two-pressing stage, the auxiliary air glue cushion block 16 is compressed to the maximum deformation, va in the calculation formula of Pi ∈ is equal to 0, the movable claw ring 6 is stressed upwards to break the shearing pin 14 by stress, the movable claw ring 6 moves upwards to the uppermost position of the directional chute 19, and the connection in the cut-off gap is cut off by the cut-off structureThe hose 2 and the slip pushing block 10 are outwards expanded to the maximum distance, so that the anchoring action is completed; the working method is as follows: after the working method IV is completed, the rubber cylinder ring 4 is subjected to compression deformation and compression, and is calibrated as a sealing stage, in the sealing stage, the pressure value reflected by the value displayed by Pi ∈is the pressure value in the second air cavity 21, and is substituted into the pressure value in a horizontal state in the Pi ∈in the working method IV, and the pressure value is recalculated to obtain ∈>To retrieve->And executing the working method four again as the actual output air pressure in the setting state to obtain a Pi ≡line graph, obtaining a real-time numerical value of which the Pi ≡is higher than that displayed in the two-pressure stage, and enabling the Pi ≡in the sealing stage to be horizontal after the packing element ring 4 is compressed to the maximum deformation amount, so as to complete the whole setting action.
The advantages are that: in this embodiment, description will be made with reference to fig. 7: in an initial state, the pressurizing equipment outside the well is started by taking P ∈r as initial pressure, the sum of the pressures of the first air cavity 20 and the second air cavity 21 is Pi, and compared with the starting point of a pressure value Pi ∈fold line in FIG. 7, the Pi in the initial stage of the setting action process is not changed obviously because the auxiliary air rubber pad block 16 in the state is not contacted with the centralizing sleeve 7;
in the continuous pressurization process, pi ∈r rises, the state is a pre-pressing stage, and when the actions described in the second embodiment are reached, the second pressure stage is started, and the auxiliary air-glue cushion block 16 reaches the maximum deformation compression amount, so that the output pressure P ∈r of the well pressurization device needs to be reduced to avoid the influence of the continuous pressurization on the slip push block 10, and reference may be made toThe process is to take the pressure value Pi ∈acquired in real time as a variable, wherein Va/La+vb/Lb is relatively quantitative, so that ∈10 can be obtained>Inversely proportional to Pi ∈ and it is to be noted that: actual output pressure of the well pressurization setup +.>Is changed in the initial phase of the two-pressure phase, in which the actual output pressure of the off-well pressurization setting is +.>No change occurs; and it is to be explained again that: when the rubber cylinder ring 4 deforms, the Pi ∈r rises to be in a rising stage, but the difference from the auxiliary air rubber cushion block 16 is that when the rubber cylinder ring 4 reaches the maximum deformation amount, the volume of the second air cavity 21 is reduced but not reset to zero, but the rubber cylinder ring is in a state difficult to deform, at this time, the Pi ∈r detected outside the well is in a relatively horizontal state, after the state lasts for a period of time, the sealing action is completed, the supercharging equipment outside the well can be withdrawn, and the releasing action is completed by the anchoring sleeve 8, which is not repeated herein.
To sum up: according to the movable process of the slip push block and the rubber sleeve ring in the process of executing the packing action of the current packer, the movable claw ring is additionally arranged between the slip push block and the conical sleeve, the movable range of the slip push block is displayed in a feedback mode through pressure change generated when an auxiliary air rubber pad block on the movable claw ring contacts the centralizing sleeve, the shearing pin is cut off through maximum stress generated when the auxiliary air rubber pad block is pressed, the preliminary locking action of the slip push block is completed in the process, the output air pressure in the setting action is synchronously reduced, the purpose of avoiding the overstroke of the slip push block caused by excessive air pressure output is achieved, the force generated in the air pressure output can be directly fed back into the rubber sleeve ring, and the sealing action required to be executed by the packer is completed through the extrusion deformation action of the rubber sleeve ring.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (5)
1. The packer based on the well cementation technology comprises a top section sleeve (3), a rubber sleeve ring (4), a conical sleeve (5), a righting sleeve (7), an anchoring sleeve (8) and an oil pipe empty sleeve (9), and is characterized in that the top section sleeve (3), the rubber sleeve ring (4), the conical sleeve (5), the righting sleeve (7) and the anchoring sleeve (8) are sequentially arranged on the oil pipe empty sleeve (9) along the direction from top to bottom, four slip push blocks (10) and righting rings (12) are respectively arranged at the upper end and the lower side circumferential outer wall of the righting sleeve (7), the four slip push blocks (10) and the righting rings (12) are arranged in an annular array along the center point of the righting sleeve (7), locking rings (11) are arranged outside the four slip push blocks (10), movable claw rings (6) are arranged on the upper part of the circumferential outer wall of the conical sleeve (5), the lower part of the circumferential outer wall of the conical sleeve (5) is in an inverted circular table shape, and the lower part of the circumferential outer wall of the conical sleeve (5) is matched with four curved surfaces in the circular table (10); the movable claw ring (6) is in sliding connection on the circumferential outer wall of the conical sleeve (5), four lower claw frames (15) are arranged at the lower side position of the movable claw ring (6), the four lower claw frames (15) are arranged in an annular array along the center point of the movable claw ring (6), the lower claw frames (15) and the slip pushing blocks (10) are arranged in an intersecting manner, an auxiliary air rubber cushion block (16) is arranged at the lower side position of the lower claw frames (15), a first air cavity (20) is arranged in the auxiliary air rubber cushion block (16), a connecting hose (2) is arranged on the auxiliary air rubber cushion block (16), the tail end of the connecting hose (2) is communicated with the first air cavity (20), the connecting hose (2) extends upwards and penetrates through the upper end of the rubber cylinder ring (4), a gas pressure sensor (1) is arranged at the initial end position of the connecting hose (2), a second air cavity (21) is arranged in the rubber cylinder ring (4), the second air cavity (21) is connected with the first air cavity (20) through the connecting hose (2), and the connecting hose (2) is arranged at the corresponding position of the conical sleeve (6); a directional chute (19) corresponding to the lower claw frame (15) is formed in the circumferential outer wall of the conical sleeve (5), a stop gap is formed between the upper surface of the movable claw ring (6) and the top end position of the directional chute (19), and the stop structure is arranged in the stop gap; four shearing pins (14) are arranged at the upper end of the circumferential outer wall of the movable claw ring (6), the four shearing pins (14) are arranged in an annular array along the center point of the movable claw ring (6), and the tail ends of the shearing pins (14) penetrate through the movable claw ring (6) and extend into the outer wall of the conical sleeve (5); the stop structure comprises inner lock knot buckles (13) and shearing pins (14), the number of the inner lock knot buckles (13) is equal to the number of the connecting hose (2), the setting positions of the inner lock knot buckles (13) correspond to the positions of the connecting hose (2), the upper end and the lower end of the inner lock knot buckles (13) are respectively arranged on the upper side and the lower side of the stop gap, the cross section of the inner lock knot buckles (13) is arc-shaped and curved, the bending direction of the inner lock knot buckles (13) points to the center point position of the movable claw ring (6), and the outer wall position, close to the center point position of the movable claw ring (6), of the inner lock knot buckles (13) is provided with a pipe pressing groove (17) corresponding to the connecting hose (2).
2. A packer based on cementing technique according to claim 1, characterized in that the cross section of the second air chamber (21) is bi-directionally serrated.
3. A packer based on well cementing technique according to claim 1, wherein the radial distance between the end of the auxiliary gas cushion block (16) and the top end of the lower jaw frame (15) is larger than the radial distance between the top end of the slip pusher (10) and the upper surface of the centralizing sleeve (7), and the setting position of the lower end of the auxiliary gas cushion block (16) is lower than the setting position of the lower end of the lower jaw frame (15).
4. The packer based on the well cementation technology according to claim 1, characterized in that the circumferential outer walls of the conical sleeve (5) and the top section sleeve (3) are provided with conduit grooves (18) corresponding to the connecting hose (2).
5. A method of operating a packer based on well cementing technology according to any one of claims 1 to 4, wherein the packer is in use in the following manner: the working method comprises the following steps: setting the packer in the designed depth position of the well, executing setting action, under the condition of stable pressure, moving the conical sleeve (5) downwards until the conical sleeve contacts the slip pushing block (10), enabling the slip pushing block (10) to move outwards to finish anchoring action, continuously moving the top section sleeve (3) downwards in the state, extruding the rubber barrel ring (4) to deform, and finishing sealing action; the working method is as follows: in the first working method, the method comprises three parts of precursor parameter presetting, parameter acquisition analysis and external parameter modeling control, and the method specifically comprises the following steps: presetting a precursor parameter: firstly, inert gas is injected into a first air cavity (20) and a second air cavity (21) through a connecting hose (2), and the total air pressure Pi in the first air cavity (20) and the second air cavity (21) is detected by a gas pressure sensor (1), a shearing pin (14) in the state is in an unbroken state, and a movable claw ring (6) is fixed on a conical sleeve (5); parameter acquisition and analysis: in the downward moving process of the conical sleeve (5), the auxiliary air rubber cushion block (16) is firstly contacted with the upper surface position of the centralizing sleeve (7) and generates compression deformation, so that the volume of a first air cavity (20) in the auxiliary air rubber cushion block (16) is reduced, inert gas in the first air cavity (20) is filled into a second air cavity (21) until the auxiliary air rubber cushion block (16) is in a completely compressed state, the volume of the first air cavity (20) is zero, when the conical sleeve (5) continuously moves downward, an upward reaction force is generated on the movable claw ring (6) and cuts off the shearing pin (14), the movable claw ring (6) moves upward, the ventilation state of a connecting hose (2) in a cut-off gap is cut off through a cut-off structure, and the state is maintained until the rubber cylinder ring (4) is in a pressed deformed stateRecording the pressure value displayed on each gas pressure sensor (1) and analyzing the pressure value; parameter modeling control: the pressure value detected by the gas pressure sensor (1) in the calibration parameter acquisition analysis is Pi ∈, a line graph is built, wherein the X coordinate axis of the line graph is calibrated to be the setting action time, and the Z coordinate axis in the line graph comprises the pressure value Pi ∈ and the output gas pressure in the setting actionWherein the output air pressure in the setting action +.>The starting point of the (E) is marked as P ≡; the working method is as follows: in the parameter acquisition analysis in the second working method, the radial distance between the lower surface of the calibration auxiliary air rubber cushion block (16) and the upper surface of the centralizing sleeve (7) is La, the total length of the rubber cylinder ring (4) is Lb, the total volume of the first air cavity (20) is Va, and the total volume of the second air cavity (21) is Vb, wherein ∈>Pi is inversely proportional to the sum of the volumes of the first air cavity (20) and the second air cavity (21) and is combined with the parameters acquired in the parameter acquisition analysis to establish +.>The method comprises the steps of carrying out a first treatment on the surface of the The working method is as follows: in the third working method, pi ∈r is the actual detection value of the gas pressure sensor (1), and when the auxiliary gas-gel cushion block (16) and the rubber cylinder ring (4) are compressed, the values of Va and Vb are reduced, pi ∈r > Pi, and in the initial state, pi=pi ∈r, reference is made toCalculating to obtain->When P ∈is continuously input, the line graph of Pi ∈ > Pi, pi ∈is continuously rising, andin the rising process, the line diagram of Pi ∈ is in a state of tending to be horizontal, the two-pressure stage is marked, in the two-pressure stage, an auxiliary air rubber pad block (16) is compressed to the maximum deformation, va in a calculation formula of Pi ∈ is equal to 0, a movable claw ring (6) is subjected to upward stress, a shearing pin (14) is broken by the stress, the movable claw ring (6) moves up to the uppermost position of a directional chute (19), a connecting hose (2) in a cutting-off gap is cut off by a cutting-off structure, and a slip pushing block (10) is outwards expanded to the maximum distance to finish the anchoring action; the working method is as follows: after the working method IV is finished, the rubber cylinder ring (4) is subjected to compression deformation and compression, the sealing stage is marked, in the sealing stage, the pressure value reflected by the value displayed by Pi +.>To retrieve->And (3) executing the working method four again as the actual output air pressure in the setting state to obtain a Pi ∈line graph, obtaining a real-time numerical value displayed in a stage that Pi ∈is higher than two pressures, and after the rubber cylinder ring (4) is compressed to the maximum deformation amount, enabling the Pi ∈in the sealing stage to approach to the horizontal level, so as to complete the whole setting action.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310664516.5A CN116378597B (en) | 2023-06-07 | 2023-06-07 | Packer based on well cementation technology and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310664516.5A CN116378597B (en) | 2023-06-07 | 2023-06-07 | Packer based on well cementation technology and working method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1025779A (en) * | 1963-09-13 | 1966-04-14 | Camco Inc | Well packer assembly for subsurface well working equipment |
| US4224987A (en) * | 1978-02-13 | 1980-09-30 | Brown Oil Tools, Inc. | Well tool |
| CN105781483A (en) * | 2016-03-07 | 2016-07-20 | 荆州市赛瑞能源技术有限公司 | Recyclable type hydraulic packer |
| CN211924130U (en) * | 2020-04-06 | 2020-11-13 | 荆州市赛瑞能源技术有限公司 | Ultrashort recoverable packer |
-
2023
- 2023-06-07 CN CN202310664516.5A patent/CN116378597B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1025779A (en) * | 1963-09-13 | 1966-04-14 | Camco Inc | Well packer assembly for subsurface well working equipment |
| US4224987A (en) * | 1978-02-13 | 1980-09-30 | Brown Oil Tools, Inc. | Well tool |
| CN105781483A (en) * | 2016-03-07 | 2016-07-20 | 荆州市赛瑞能源技术有限公司 | Recyclable type hydraulic packer |
| CN211924130U (en) * | 2020-04-06 | 2020-11-13 | 荆州市赛瑞能源技术有限公司 | Ultrashort recoverable packer |
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| CN116378597A (en) | 2023-07-04 |
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Inventor after: Zhang Xiuwu Inventor after: Zhang Kui Inventor after: Zhang Shanshan Inventor after: Chen Guanghui Inventor after: Wang Meng Inventor before: Zhang Xiuwu Inventor before: Zhang Kui Inventor before: Zhang Shanshan Inventor before: Chen Guanghui Inventor before: Wang Meng |