CN214944122U - Pitching-free anchoring setting mechanism - Google Patents

Abstract

The utility model relates to a pitching-free anchoring and setting mechanism, wherein a pressure-building mechanism, an anchoring mechanism and an inclined body are sequentially arranged above a setting mechanism; the lower end of a rubber cylinder sliding sleeve of the setting mechanism is screwed with a rubber cylinder lower joint, a rubber cylinder lower seat, a rubber cylinder and a rubber cylinder upper sleeve are sequentially stacked above the rubber cylinder lower joint, and a spacer ring is arranged at the middle section of the rubber cylinder; two ends of the rubber sleeve push plate respectively extend out of the long groove of the rubber sleeve sliding sleeve and press the top of the rubber sleeve upper sleeve; a piston is arranged in an inner cavity of a piston outer cylinder of the pressure building mechanism, a piston tail pipe is arranged at the lower end of the piston, a center hole of the piston tail pipe is communicated with a center hole of the piston, a ball seat fixing seat is arranged on an inner step of the middle section of the center hole of the piston tail pipe, a ball seat is fixed in an inner cavity of the ball seat fixing seat through a ball seat shear pin, and a low-density ball is arranged in a bell mouth at the upper end of the ball seat; a ball seat splitter plate is arranged above the ball seat fixing seat, and the upper part of the ball seat splitter plate is fixed on the inner wall of the central hole of the piston tail pipe through a retainer ring for holes. The utility model discloses once go into the well and do not throw the ball and can accomplish setting and anchoring.

Description

Pitching-free anchoring setting mechanism

Technical Field

The utility model relates to a sit and seal the mechanism, in particular to exempt from bowling anchoring and sit and seal mechanism belongs to borehole operation instrument technical field.

Background

The casing windowing and sidetracking technology is a technology for sidetracking a new borehole after windowing at a certain specific depth by fully utilizing the casing of an old well. The method is an old oil field development technical measure with low investment, quick response and remarkable economic benefit, all countries in the world pay great attention to the research and application of the technology, and the method becomes an important means for recognizing the old oil field, increasing the storage and the yield of the old oil field and improving the final recovery ratio in the exploration and development of a plurality of oil fields in all countries in the world, and shows wide development prospect and popularization and application value.

Casing windowing sidetracking well can be divided into the following window-opening modes: the section milling windowing and the whipstock windowing are two types, and the main operation procedures comprise: wellbore preparation, casing windowing, sidetrack drilling, completion operations, and the like. Under the conditions that the stratum is hard, the well cementation quality is good, and water layers which cannot be opened are arranged above and below the windowing point, the windowing mode of the ground anchor whipstock is generally selected.

The window opening procedure of the whipstock is simple, the window opening time is short, the whipstock is adaptable to larger well inclination angles, the guider is matched with the packer, the whipstock can be used as a bridge plug to save the cement plug opening process, the scrap iron amount is small, and the dependence degree on the performance of drilling fluid is reduced.

The hydraulic ground anchor whipstock mainly comprises a feeding joint, a feeding rod, a deflecting body, a jaw, a piston cone assembly, a ball seat and the like. The ground anchor whipstock is lowered to a preset windowing position by a feeding tool, and water is needed to be filled if the pipe is difficult to descend due to buoyancy in the pipe descending process. After the ball is thrown, a pump is slowly started to press the setting and sealing slope guider; after the setting is firm, rotating the drilling tool, reversely opening the connecting threads of the feeding tool and the guide inclined plane, finally lifting the drilling tool to cut off the connecting pin of the centering disc and the guide inclined plane, and pulling out the feeding tool; and then the next time of the compound milling cone carries out milling windowing.

When the window is opened, the milling cone or the drill bit moves downwards along the inclined body of the whipstock, the inclined body bears a large reaction force, cannot slide and needs to be anchored reliably; meanwhile, the italic cannot rotate, otherwise, the windowing direction is wrong.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a exempt from bowling anchoring and sit and seal mechanism, need not be in milk and bowling, can target in place down smoothly, sit and seal earlier, reliable anchoring is carried out to the back, can bear very big thrust behind the anchoring and can not take place to slide or rotate.

In order to solve the technical problem, the ball-throwing-free anchoring and setting mechanism of the utility model comprises a setting mechanism, a pressure-holding mechanism is arranged above the setting mechanism, an anchoring mechanism is arranged above the pressure-holding mechanism, the setting mechanism comprises a rubber sleeve sliding sleeve, a rubber sleeve lower joint is screwed on the periphery of the lower end of the rubber sleeve sliding sleeve, a rubber sleeve lower seat, a rubber sleeve and a rubber sleeve upper sleeve which are sleeved on the periphery of the rubber sleeve sliding sleeve are sequentially superposed above the rubber sleeve lower joint, and a rubber sleeve spacer ring is arranged in the middle section of the rubber sleeve; the middle circumference of the rubber sleeve sliding sleeve is symmetrically provided with sliding sleeve long grooves extending along the axial direction, and two ends of a rubber sleeve push plate respectively extend out of the sliding sleeve long grooves and press the top of the rubber sleeve upper sleeve; the pressure building mechanism comprises a piston outer cylinder which is screwed at the upper end of a rubber cylinder sliding sleeve, a piston is arranged in an inner cavity of the piston outer cylinder, a piston tail pipe which is connected with the piston tail pipe into a whole is arranged at the lower end of the piston, a central hole of the piston tail pipe is communicated with a central hole of the piston, a ball seat fixing seat is arranged on an inner step of the middle section of the central hole of the piston tail pipe, a ball seat is fixed in the inner cavity of the ball seat fixing seat through a ball seat shear pin, and a low-density ball is arranged in a horn mouth at the upper end of the ball seat; a ball seat splitter plate is arranged above the ball seat fixing seat, and the upper portion of the ball seat splitter plate is fixed to the inner wall of the central hole of the piston tail pipe through a check ring for holes.

As an improvement of the utility model, the lower extreme of piston tail pipe is equipped with the tail pipe slider, the lower part of tail pipe slider and piston tail pipe is pegged graft the inner chamber of packing element sliding sleeve, the middle part of tail pipe slider is equipped with the radial groove of slider that link up, peg graft at the middle part of packing element push pedal in the radial groove of slider, and through the push pedal round pin with the tail pipe slider is connected.

As a further improvement of the utility model, the lower circumference of the piston tail pipe is provided with a tail pipe bypass hole, and the tail pipe bypass hole is positioned above the tail pipe slide block; a tail pipe ratchet is arranged on the periphery of the middle upper part of the piston tail pipe, a piston ratchet ring is arranged on an inner step at the upper end of the rubber cylinder sliding sleeve, and the piston ratchet ring is clamped on the tail pipe ratchet; the periphery of the upper portion of the piston ratchet ring is provided with a piston ratchet ring clamping sleeve, the lower end of the piston ratchet ring clamping sleeve is abutted against the upper end opening of the rubber cylinder sliding sleeve, the upper end of the piston ratchet ring clamping sleeve is abutted against the lower portion of the inner step of the piston outer cylinder, and an inner boss on the upper portion of the piston ratchet ring clamping sleeve is pressed on the top of the piston ratchet ring.

As a further improvement of the present invention, the anchoring mechanism includes a lower slip-proof slip mechanism, the lower slip-proof slip mechanism includes a lower slip outer cylinder lower joint screwed on the upper end of the piston outer cylinder, the upper portion of the lower slip outer cylinder lower joint is screwed with a lower slip outer cylinder, an inner cavity of the lower slip outer cylinder is provided with a lower slip cone with a downward small end, an upper cylindrical section of the lower slip cone is sealed with an inner wall of the lower slip outer cylinder through a sealing ring, a lower slip is sleeved on a middle outer conical surface of the lower slip cone, and an anti-slip surface of the lower slip is embedded in a middle caulking groove of the lower slip outer cylinder; the lower end of the lower clamping cone is screwed with a lower pressure transmission pipe, and the lower end of the lower pressure transmission pipe is inserted into a bottom center unthreaded hole of a lower joint of the lower slip outer cylinder and sealed through a sealing ring.

As a further improvement of the utility model, a lower connecting pipe is arranged in the central hole of the lower clamping cone, a lower slip ratchet is arranged on the periphery of the lower connecting pipe, a lower slip ratchet ring is arranged on an inner step at the upper end of the lower clamping cone, and the lower slip ratchet ring is clamped on the lower slip ratchet; the slip-preventing mechanism is characterized in that a lower slip ratchet ring clamping sleeve is arranged on the periphery of the upper portion of the lower slip ratchet ring, the lower end of the lower slip ratchet ring clamping sleeve abuts against an inner step of the lower slip cone, the periphery of the lower slip ratchet ring clamping sleeve is screwed in a female thread on the upper portion of the lower slip cone, a lower slip hydraulic cavity is arranged at the top of the lower slip cone, a lower connecting pipe bypass hole communicated with the lower slip hydraulic cavity is formed in the periphery of the upper portion of the lower connecting pipe, and the upper end of the lower connecting pipe is screwed at the lower end of the middle anti-rotation slip mechanism.

As a further improvement of the present invention, the middle anti-rotation slip mechanism includes a middle slip outer cylinder lower joint screwed on the upper end of the lower slip outer cylinder, the upper part of the middle slip outer cylinder lower joint is screwed with a middle slip outer cylinder, an inner cavity of the middle slip outer cylinder is provided with a middle slip cone with a downward small end, an upper cylindrical section of the middle slip cone is sealed with an inner wall of the middle slip outer cylinder through a sealing ring, a middle slip is sleeved on a middle outer conical surface of the middle slip cone, and an anti-rotation slip surface of the middle slip is embedded in a middle caulking groove of the middle slip outer cylinder; the lower end of the middle clamping cone is screwed with a middle pressure transmission pipe, the lower end of the middle pressure transmission pipe is inserted into a bottom center unthreaded hole of the lower joint of the middle slip outer barrel and sealed through a sealing ring, and the upper end of the lower connecting pipe is screwed into a bottom inner threaded hole of the lower joint of the middle slip outer barrel.

As a further improvement of the utility model, a middle connecting pipe is arranged in the central hole of the middle clamping cone, a middle slip ratchet is arranged on the periphery of the middle connecting pipe, a middle slip ratchet ring is arranged on the inner step at the upper end of the middle clamping cone, and the middle slip ratchet ring is clamped on the middle slip ratchet; the periphery of the upper portion of the middle slip ratchet ring is provided with a middle slip ratchet ring clamping sleeve, the lower end of the middle slip ratchet ring clamping sleeve abuts against an inner step of the middle slip cone, the periphery of the middle slip ratchet ring clamping sleeve is screwed in a female thread on the upper portion of the middle slip cone, the top of the middle slip cone is provided with a common hydraulic cavity, the periphery of the upper portion of the middle connecting pipe is provided with a middle connecting pipe bypass hole communicated with the common hydraulic cavity, and the upper end of the middle connecting pipe is screwed at the lower end of the upper anti-slip mechanism.

As a further improvement of the present invention, the upper anti-slip mechanism includes an upper slip outer cylinder connected with the middle slip outer cylinder into a whole, the upper slip outer cylinder and the middle slip outer cylinder are separated from each other by an inner boss, an inner cavity of the upper slip outer cylinder is provided with an upper slip cone with an upward small end, a lower cylindrical section of the upper slip cone is sealed with an inner wall of the upper slip outer cylinder by a seal ring, an upper slip is sleeved on an upper outer conical surface of the upper slip cone, and an anti-slip surface of the upper slip is embedded in an upper caulking groove of the upper slip outer cylinder; the upper end of the central hole of the upper clamping cone is connected with an upper pressure transmission pipe in an inserted mode, the upper end of the upper pressure transmission pipe is communicated with the central hole of the inclined body connector and is connected with the central hole of the inclined body connector into a whole, the lower circumference of the inclined body connector is connected in the upper port of the upper clamping slip outer barrel in a screwed mode, and the upper circumference of the inclined body connector is connected with the bottom of the large end of the inclined body in a screwed mode.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: 1. when the tool is put down along with the pipe column, because the density of the low-density ball is only 2-2.3 times of that of drilling fluid, the pressure difference between the inside and the outside of the pipe column can easily push the low-density ball away from the bell mouth of the ball seat, the annular drilling fluid enters the tool and the inner cavity of the pipe column from the tail pipe by-pass hole, the inner cavity of the tool is filled through the throat of the ball seat, self-grouting is realized, the condition that a faucet is mounted for multiple times of shutdown for grouting is avoided, and the pipe column can be put down well smoothly; and the process of ball throwing is saved, and the windowing efficiency is improved.

2. The setting pressure of the rubber cylinder is lower than the anchoring pressure of the anchoring mechanism, and when a wellhead is pressurized, drilling fluid crosses the inclined body through the hydraulic rubber pipe, enters the inclined body connector and enters the central hole of the anchoring mechanism from the upper pressure transmission pipe.

3. The inclined body is fixed above the anchoring mechanism, when the tool is lowered to a well section needing windowing, and the orientation of the inclined body is adjusted, the well mouth is pressurized, and the low-density ball is located on the bell mouth of the ball seat, so that pressure is held. The ball seat and the ball seat fixing seat drive the piston tail pipe to move downwards, tail pipe ratchets on the periphery of the piston tail pipe slide downwards in the piston ratchet ring in a one-way mode and are locked, a tail pipe sliding block at the lower end of the piston tail pipe moves downwards along a central hole of the rubber sleeve sliding sleeve and simultaneously drives the rubber sleeve push plate to move downwards along a sliding sleeve long groove of the rubber sleeve sliding sleeve, and the rubber sleeve push plate pushes the rubber sleeve upper sleeve to downwards extrude the rubber sleeve so that the rubber sleeve is expanded and sealed on the inner wall of the original sleeve. The rubber cylinder is divided into an upper part and a lower part by the rubber cylinder spacer ring, so that two expansion joints can be formed, and the setting effect is improved.

4. After the rubber cylinder is sealed, the well mouth is continuously pressurized, the upper anti-slip mechanism, the middle anti-rotation slip mechanism and the lower anti-slip mechanism simultaneously act to realize anchoring, the outer surfaces of the upper slip and the lower slip are respectively provided with transverse clamping teeth, and the sliding can be prevented after anchoring, so that the accuracy of the windowing height is ensured; the outer surface of the middle slip is provided with vertical clamping teeth, so that rotation can be prevented after anchoring, and the accuracy of the windowing direction is ensured.

5. When anchoring, pressure liquid enters the common hydraulic cavity from the by-pass hole of the middle connecting pipe to push the upper clamping cone to go upwards and push the upper clamping tile outwards, so that the anti-skid anchoring of the upper clamping tile is realized; when the upper clamping cone goes upwards, the central hole of the upper clamping cone is sleeved on the periphery of the upper pressure transmission pipe to slide. Meanwhile, the pressure liquid of the common hydraulic cavity pushes the middle clamping cone to move downwards, and the middle clamping cone moves downwards to push out the middle slip outwards, so that the anti-rotation anchoring of the middle slip is realized; when the middle clamping cone moves downwards, the middle clamping shoe ratchet ring gear is in one-way fit with the middle clamping shoe ratchet at the periphery of the middle connecting pipe, so that anchoring loosening is prevented. Pressure liquid enters an inner cavity of the lower connecting pipe through the middle pressure transmission pipe, enters a lower slip hydraulic cavity from a lower connecting pipe bypass hole, pushes the lower slip cone to move downwards, and pushes the lower slip out to realize anchoring; when the lower clamping cone moves downwards, the lower slip ratchet ring is in one-way fit with the lower slip ratchet on the periphery of the lower connecting pipe, so that the lower slip is prevented from loosening.

6. After the three slips are anchored, the wellhead is continuously pressurized, the ball seat shear pin is cut off, the ball seat falls down, the center hole of the piston is communicated with the annulus above the rubber cylinder through the by-pass hole of the tail pipe, and then the drill bit moves downwards along the inclined plane of the inclined body to perform windowing. After the tool is put into the well, setting and anchoring can be completed without throwing balls and pulling out the drill, and anchoring is reliable, so that the windowing period of the casing is greatly shortened, the operating efficiency is improved, the energy consumption is reduced, and the labor intensity is reduced.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

Fig. 1 is a front view of the ball-throwing-free anchoring setting mechanism of the present invention.

In the figure: 1. a setting mechanism; 1a, a lower joint of a rubber cylinder; 1b, a rubber sleeve sliding sleeve; 1c, a lower rubber cylinder seat; 1d, a rubber cylinder; 1e, a rubber cylinder spacer ring; 1f, sleeving a rubber cylinder; 1g, pushing a rubber cylinder; 2. a pressure building mechanism; 2a, a piston outer cylinder; 2b, a piston; 2c, a piston tail pipe; 2c1. tail pipe bypass holes; 2d, a tail pipe sliding block; 2e, a piston ratchet ring; 2f, a piston ratchet ring clamping sleeve; 2g, fixing a ball seat; 2h, ball seat shear pins; 2j. a ball seat; 2k, low density spheres; 2m. a ball seat splitter plate; 3. a lower anti-slip mechanism; 3a, a lower joint of the outer cylinder of the lower slip; 3b, a slip lower outer cylinder; 3c, a lower clamping cone; 3d, pulling slips downwards; 3e, a pressure transmission pipe is arranged; 3f, a lower connecting pipe; 3f1. lower connecting pipe bypass hole; 3g, turning off a slip ratchet ring; 3h, clamping a lower slip ratchet ring sleeve; 4. a middle anti-rotation slip mechanism; 4a, connecting the lower end of the outer cylinder of the middle slip; 4b, a middle slip outer cylinder; 4c, a middle clamping cone; 4d, a middle slip; 4e, a middle pressure transmission pipe; 4f, a middle connecting pipe; 4f1. connecting pipe bypass hole; 4g, a middle slip ratchet ring; 4h, clamping a middle slip ratchet ring sleeve; 4j, sharing a hydraulic cavity; 5. an upper anti-slip mechanism; 5a, an outer slip cylinder is arranged; 5b, mounting a clamping cone; 5c, clamping slips are put; 5d, uploading a pressure transmission pipe; 6. an italic connector; 7. italics.

Detailed Description

As shown in fig. 1, the utility model discloses a exempt from bowling anchoring and sit and seal mechanism is equipped with suppressing pressure mechanism 2 including sitting and sealing mechanism 1, the top of sitting and sealing mechanism 1, suppresses pressure mechanism 2's top and is equipped with anchoring mechanism, and anchoring mechanism's top is passed through the italic connector 6 and is linked to each other with italic 7.

The setting mechanism 1 comprises a rubber sleeve sliding sleeve 1b, a rubber sleeve lower joint 1a is screwed on the periphery of the lower end of the rubber sleeve sliding sleeve 1b, a rubber sleeve lower seat 1c, a rubber sleeve 1d and a rubber sleeve upper sleeve 1f which are sleeved on the periphery of the rubber sleeve sliding sleeve 1b are sequentially overlapped above the rubber sleeve lower joint 1a, and a rubber sleeve spacer ring 1e is arranged in the middle section of the rubber sleeve 1 d; the middle circumference of the rubber sleeve sliding sleeve 1b is symmetrically provided with sliding sleeve long grooves extending along the axial direction, and two ends of the rubber sleeve push plate 1g respectively extend out of the sliding sleeve long grooves and press the top of the rubber sleeve upper sleeve 1f.

The pressure building mechanism 2 comprises a piston outer cylinder 2a which is screwed at the upper end of a rubber cylinder sliding sleeve 1b, a piston 2b is arranged in the inner cavity of the piston outer cylinder 2a, a piston tail pipe 2c which is connected with the lower end of the piston 2b into a whole is arranged at the lower end of the piston 2b, the central hole of the piston tail pipe 2c is communicated with the central hole of the piston, a ball seat fixing seat 2g is arranged on the inner step of the middle section of the central hole of the piston tail pipe, a ball seat 2j is fixed in the inner cavity of the ball seat fixing seat 2g through a ball seat shear pin 2h, and a low-density ball 2k is arranged in the upper end bell mouth of the ball seat 2 j; the ball seat splitter plate 2m is arranged above the ball seat fixing seat 2g, and the ball seat splitter plate 2m is fixed on the inner wall of the central hole of the piston tail pipe through a hole retainer ring.

The lower end of the piston tail pipe 2c is provided with a tail pipe sliding block 2d, the lower parts of the tail pipe sliding block 2d and the piston tail pipe 2c are inserted in the inner cavity of the rubber cylinder sliding sleeve 1b, the middle part of the tail pipe sliding block 2d is provided with a through sliding block radial groove, and the middle part of the rubber cylinder push plate 1g is inserted in the sliding block radial groove and is connected with the tail pipe sliding block 2d through a push plate pin.

A tail pipe bypass hole 2c1 is formed in the lower circumference of the piston tail pipe 2c, and the tail pipe bypass hole 2c1 is located above the tail pipe sliding block 2 d; a tail pipe ratchet is arranged on the periphery of the middle upper part of the piston tail pipe 2c, a piston ratchet ring gear 2e is arranged on an inner step at the upper end of the rubber cylinder sliding sleeve 1b, and the piston ratchet ring gear 2e is clamped on the tail pipe ratchet; the periphery of the upper portion of the piston ratchet ring 2e is provided with a piston ratchet ring clamping sleeve 2f, the lower end of the piston ratchet ring clamping sleeve 2f is abutted against the upper end port of the rubber cylinder sliding sleeve 1b, the upper end of the piston ratchet ring clamping sleeve 2f is abutted against the lower portion of the inner step of the piston outer cylinder 2a, and the inner boss on the upper portion of the piston ratchet ring clamping sleeve 2f is pressed on the top of the piston ratchet ring 2e.

The anchoring mechanism comprises a lower anti-slip mechanism 3, the lower anti-slip mechanism 3 comprises a lower slip outer cylinder lower joint 3a which is screwed at the upper end of a piston outer cylinder 2a, the upper part of the lower slip outer cylinder lower joint 3a is screwed with a lower slip outer cylinder 3b, the inner cavity of the lower slip outer cylinder 3b is provided with a lower clamping cone 3c with a downward small end, the upper cylindrical section of the lower clamping cone 3c is sealed with the inner wall of the lower slip outer cylinder 3b through a sealing ring, the middle outer conical surface of the lower clamping cone 3c is sleeved with a lower slip 3d, and the anti-slip surface of the lower slip 3d is embedded in a middle caulking groove of the lower slip outer cylinder 3 b; the lower end of the lower clamping cone 3c is screwed with a lower pressure transmission pipe 3e, and the lower end of the lower pressure transmission pipe 3e is inserted into a bottom central unthreaded hole of a lower joint 3a of the lower slip outer cylinder and sealed through a sealing ring.

A lower connecting pipe 3f is arranged in a central hole of the lower clamping cone 3c, a lower slip ratchet is arranged on the periphery of the lower connecting pipe 3f, a lower slip ratchet ring gear 3g is arranged on an inner step at the upper end of the lower clamping cone 3c, and the lower slip ratchet ring gear 3g is clamped on the lower slip ratchet; the upper portion periphery of slips ratchet ring gear 3g down is equipped with slips ratchet ring gear cutting ferrule 3h down, the lower extreme of slips ratchet ring gear cutting ferrule 3h down supports and leans on the interior step of lower calorie of awl 3c, the periphery of slips ratchet ring gear cutting ferrule 3h down connects soon in the female thread on lower calorie of awl 3c upper portion down, the top of lower calorie of awl 3c is equipped with slips hydraulic pressure chamber down, be equipped with the lower connecting pipe by-pass hole 3f1 that link up with slips hydraulic pressure chamber down on the upper portion circumference of lower connecting pipe 3f, the upper end of lower connecting pipe 3f connects soon and prevents the lower extreme of commentaries on classics slips mechanism 4 in.

The middle anti-rotation slip mechanism 4 comprises a middle slip outer cylinder lower joint 4a which is screwed at the upper end of a lower slip outer cylinder 3b, the upper part of the middle slip outer cylinder lower joint 4a is screwed with a middle slip outer cylinder 4b, the inner cavity of the middle slip outer cylinder 4b is provided with a middle slip cone 4c with a downward small end, the upper cylindrical section of the middle slip cone 4c is sealed with the inner wall of the middle slip outer cylinder 4b through a sealing ring, the middle slip 4d is sleeved on the middle outer conical surface of the middle slip cone 4c, and the anti-rotation slip surface of the middle slip 4d is embedded in the middle caulking groove of the middle slip outer cylinder 4 b; the lower end of the middle clamping cone 4c is screwed with a middle pressure transmission pipe 4e, the lower end of the middle pressure transmission pipe 4e is inserted into a bottom center unthreaded hole of the lower joint 4a of the middle slip outer cylinder and is sealed through a sealing ring, and the upper end of the lower connecting pipe 3f is screwed into a bottom inner threaded hole of the lower joint 4a of the middle slip outer cylinder.

A middle connecting pipe 4f is arranged in a central hole of the middle clamping cone 4c, a middle slip ratchet is arranged on the periphery of the middle connecting pipe 4f, a middle slip ratchet ring gear 4g is arranged on an inner step at the upper end of the middle clamping cone 4c, and the middle slip ratchet ring gear 4g is clamped on the middle slip ratchet; the upper portion periphery of well slips ratchet ring gear 4g is equipped with well slips ratchet ring gear cutting ferrule 4h, the lower extreme of well slips ratchet ring gear cutting ferrule 4h supports and leans on the interior step of well calorie awl 4c, the periphery of well calorie ratchet ring gear cutting ferrule 4h connects in the female screw thread on well calorie awl 4c upper portion soon, the top of well calorie awl 4c is equipped with sharing hydraulic pressure chamber 4j, be equipped with on the upper portion circumference of well connecting pipe 4f and share hydraulic pressure chamber 4j through-going well connecting pipe by-pass hole 4f1, the upper end of well connecting pipe 4f connects soon in the lower extreme of last anti-skidding slips mechanism 5.

The upper anti-slip mechanism 5 comprises an upper slip outer cylinder 5a which is connected with a middle slip outer cylinder 4b into a whole, the upper slip outer cylinder 5a and the middle slip outer cylinder 4b are separated from each other through an inner boss, an inner cavity of the upper slip outer cylinder 5a is provided with an upper slip cone 5b with an upward small end, the lower cylindrical section of the upper slip cone 5b is sealed with the inner wall of the upper slip outer cylinder 5a through a sealing ring, an upper slip 5c is sleeved on the upper outer conical surface of the upper slip cone 5b, and the anti-slip surface of the upper slip 5c is embedded in an upper caulking groove of the upper slip outer cylinder 5 a; an upper pressure transmission pipe 5d is inserted at the upper end of the central hole of the upper clamping cone 5b, the upper end of the upper pressure transmission pipe 5d is communicated with the central hole of the italic connector 6 and is connected into a whole, the lower circumference of the italic connector 6 is screwed in the upper port of the upper slip outer cylinder 5a, and the upper circumference of the italic connector 6 is screwed with the bottom of the big end of the italic 7.

The low-density ball 2k is placed into the ball seat 2j in advance, the upper end of the low-density ball is limited by the ball seat splitter plate 2m, when the tool goes down the well along with the pipe column, because the density of the low-density ball 2k is only 2-2.3 times of that of drilling fluid, the pressure difference between the inside and the outside of the pipe column can easily push the low-density ball 2k away from the bell mouth of the ball seat 2j, the annular drilling fluid enters the tool and the inner cavity of the pipe column from the tail pipe bypass hole 2c1, the inner cavity of the tool is filled through the throat of the ball seat 2j, self-grouting is realized, the condition that the water faucet is mounted for grouting after multiple times of shutdown is avoided, and the pipe column can go down the well smoothly; and the process of ball throwing is saved, and the windowing efficiency is improved.

The setting pressure of the rubber cylinder 1d is lower than the anchoring pressure of the anchoring mechanism, when a wellhead is pressurized, well fluid passes through the hydraulic rubber pipe, crosses the inclined body 7, enters the inclined body connector 6, and enters the central hole of the anchoring mechanism from the upper pressure pipe 5d.

When the tool is lowered to a well section needing windowing and the direction is adjusted, the well mouth is pressurized, and the low-density ball 2k is located on the bell mouth of the ball seat 2j, so that pressure is held. The ball seat 2j and the ball seat fixing seat 2g drive the piston tail pipe 2c to move downwards, tail pipe ratchets on the periphery of the piston tail pipe 2c slide downwards in the piston ratchet ring 2e in a single direction and are locked, the tail pipe sliding block 2d at the lower end of the piston tail pipe 2c moves downwards along the central hole of the rubber sleeve sliding sleeve 1b, meanwhile, the rubber sleeve pushing plate 1g is driven to move downwards along the sliding sleeve elongated slot of the rubber sleeve sliding sleeve 1b, and the rubber sleeve pushing plate 1g pushes the rubber sleeve upper sleeve 1f to downwards extrude the rubber sleeve 1d, so that the rubber sleeve 1d is expanded and sealed on the inner wall of the original sleeve. The rubber cylinder spacer ring 1e divides the rubber cylinder 1d into an upper part and a lower part, so that two expansion joints can be formed, and the setting effect is improved.

After the rubber cylinder 1d is set, the wellhead continues to be pressurized, the upper anti-slip mechanism 5, the middle anti-rotation slip mechanism 4 and the lower anti-slip mechanism 3 simultaneously act to realize anchoring, the outer surfaces of the upper slip 5c and the lower slip 3d are respectively provided with transverse clamping teeth, and the rubber cylinder can be prevented from sliding downwards after anchoring, so that the accuracy of the windowing height is ensured; the outer surface of the middle slip 4d is provided with vertical clamping teeth, so that rotation can be prevented after anchoring, and the windowing direction is accurate.

When anchoring, pressure liquid enters the common hydraulic cavity 4j from the middle connecting pipe bypass hole 4f1, the upper clamping cone 5b is pushed to move upwards, the upper slip 5c is ejected outwards, and anti-skid anchoring of the upper slip 5c is realized; when the upper clamping cone 5b goes upwards, the central hole thereof slides on the periphery of the upper pressure transmission pipe 5d. Meanwhile, the pressure liquid of the common hydraulic cavity 4j pushes the middle clamping cone 4c to move downwards, the middle clamping cone 4c moves downwards to push out the middle slip 4d outwards, and anti-rotation anchoring of the middle slip 4d is achieved; when the middle clamping cone 4c goes down, the middle clamping shoe ratchet ring gear 4g is in one-way fit with the middle clamping shoe ratchet at the periphery of the middle connecting pipe 4f, so that the anchoring loosening is prevented. Pressure liquid enters an inner cavity of the lower connecting pipe 3f through the middle pressure transmission pipe 4e, enters a lower slip hydraulic cavity from a lower connecting pipe bypass hole 3f1, pushes the lower slip cone 3c to move downwards, and ejects the lower slip 3d out to realize anchoring; when the lower clamping cone 3c moves downwards, the lower slip ratchet ring 3g is in one-way fit with the lower slip ratchet at the periphery of the lower connecting pipe 3f, and the lower slip 3d is prevented from loosening.

After the three slips are anchored, the wellhead continues to be pressurized, the ball seat shear pin 2h is cut off, the ball seat 2j falls down, and the central hole of the piston is communicated with the annulus above the rubber cylinder 1d through the tail pipe bypass hole 2c1, so that subsequent well cementation is facilitated. After the ball seat shear pin is sheared for 2h, the anchoring mechanism is confirmed not to slide downwards, and then windowing is carried 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 the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims (8)

1. The utility model provides a exempt from bowling anchoring and sit and seal mechanism, includes and sits and seals the mechanism, its characterized in that: a pressure building mechanism is arranged above the setting mechanism, an anchoring mechanism is arranged above the pressure building mechanism, the setting mechanism comprises a rubber cylinder sliding sleeve, a rubber cylinder lower joint is screwed on the periphery of the lower end of the rubber cylinder sliding sleeve, a rubber cylinder lower seat, a rubber cylinder and a rubber cylinder upper sleeve which are sleeved on the periphery of the rubber cylinder sliding sleeve are sequentially overlapped above the rubber cylinder lower joint, and a rubber cylinder spacer ring is arranged in the middle section of the rubber cylinder; the middle circumference of the rubber sleeve sliding sleeve is symmetrically provided with sliding sleeve long grooves extending along the axial direction, and two ends of a rubber sleeve push plate respectively extend out of the sliding sleeve long grooves and press the top of the rubber sleeve upper sleeve; the pressure building mechanism comprises a piston outer cylinder which is screwed at the upper end of a rubber cylinder sliding sleeve, a piston is arranged in an inner cavity of the piston outer cylinder, a piston tail pipe which is connected with the piston tail pipe into a whole is arranged at the lower end of the piston, a central hole of the piston tail pipe is communicated with a central hole of the piston, a ball seat fixing seat is arranged on an inner step of the middle section of the central hole of the piston tail pipe, a ball seat is fixed in the inner cavity of the ball seat fixing seat through a ball seat shear pin, and a low-density ball is arranged in a horn mouth at the upper end of the ball seat; a ball seat splitter plate is arranged above the ball seat fixing seat, and the upper portion of the ball seat splitter plate is fixed to the inner wall of the central hole of the piston tail pipe through a check ring for holes.

2. The pitch-free anchored setting mechanism of claim 1, wherein: the lower end of the piston tail pipe is provided with a tail pipe sliding block, the lower parts of the tail pipe sliding block and the piston tail pipe are inserted into the inner cavity of the rubber cylinder sliding sleeve, the middle part of the tail pipe sliding block is provided with a through sliding block radial groove, and the middle part of the rubber cylinder push plate is inserted into the sliding block radial groove and is connected with the tail pipe sliding block through a push plate pin.

3. The pitch-free anchored setting mechanism of claim 2, wherein: a tail pipe bypass hole is formed in the circumference of the lower part of the piston tail pipe and is positioned above the tail pipe sliding block; a tail pipe ratchet is arranged on the periphery of the middle upper part of the piston tail pipe, a piston ratchet ring is arranged on an inner step at the upper end of the rubber cylinder sliding sleeve, and the piston ratchet ring is clamped on the tail pipe ratchet; the periphery of the upper portion of the piston ratchet ring is provided with a piston ratchet ring clamping sleeve, the lower end of the piston ratchet ring clamping sleeve is abutted against the upper end opening of the rubber cylinder sliding sleeve, the upper end of the piston ratchet ring clamping sleeve is abutted against the lower portion of the inner step of the piston outer cylinder, and an inner boss on the upper portion of the piston ratchet ring clamping sleeve is pressed on the top of the piston ratchet ring.

4. The pitch-free anchored setting mechanism of claim 1, wherein: the anchoring mechanism comprises a lower anti-slip mechanism, the lower anti-slip mechanism comprises a lower slip outer barrel lower joint screwed at the upper end of the piston outer barrel, the upper part of the lower slip outer barrel lower joint is screwed with a lower slip outer barrel, a lower clamping cone with a downward small end is arranged in the inner cavity of the lower slip outer barrel, the upper cylindrical section of the lower clamping cone is sealed with the inner wall of the lower slip outer barrel through a sealing ring, a lower slip is sleeved on the middle outer conical surface of the lower clamping cone, and the anti-slip surface of the lower slip is embedded in a middle caulking groove of the lower slip outer barrel; the lower end of the lower clamping cone is screwed with a lower pressure transmission pipe, and the lower end of the lower pressure transmission pipe is inserted into a bottom center unthreaded hole of a lower joint of the lower slip outer cylinder and sealed through a sealing ring.

5. The pitch-free anchored setting mechanism of claim 4, wherein: a lower connecting pipe is arranged in a central hole of the lower clamping cone, a lower slip ratchet is arranged on the periphery of the lower connecting pipe, a lower slip ratchet ring is arranged on an inner step at the upper end of the lower clamping cone, and the lower slip ratchet ring is clamped on the lower slip ratchet; the slip-preventing mechanism is characterized in that a lower slip ratchet ring clamping sleeve is arranged on the periphery of the upper portion of the lower slip ratchet ring, the lower end of the lower slip ratchet ring clamping sleeve abuts against an inner step of the lower slip cone, the periphery of the lower slip ratchet ring clamping sleeve is screwed in a female thread on the upper portion of the lower slip cone, a lower slip hydraulic cavity is arranged at the top of the lower slip cone, a lower connecting pipe bypass hole communicated with the lower slip hydraulic cavity is formed in the periphery of the upper portion of the lower connecting pipe, and the upper end of the lower connecting pipe is screwed at the lower end of the middle anti-rotation slip mechanism.

6. The pitch-free anchored setting mechanism of claim 5, wherein: the middle anti-rotation slip mechanism comprises a middle slip outer barrel lower joint which is screwed at the upper end of the lower slip outer barrel, the upper part of the middle slip outer barrel lower joint is screwed with a middle slip outer barrel, an inner cavity of the middle slip outer barrel is provided with a middle slip cone with a downward small end, the upper cylindrical section of the middle slip cone is sealed with the inner wall of the middle slip outer barrel through a sealing ring, a middle slip is sleeved on the middle outer conical surface of the middle slip cone, and an anti-rotation slip surface of the middle slip is embedded in a middle embedding groove of the middle slip outer barrel; the lower end of the middle clamping cone is screwed with a middle pressure transmission pipe, the lower end of the middle pressure transmission pipe is inserted into a bottom center unthreaded hole of the lower joint of the middle slip outer barrel and sealed through a sealing ring, and the upper end of the lower connecting pipe is screwed into a bottom inner threaded hole of the lower joint of the middle slip outer barrel.

7. The pitch-free anchored setting mechanism of claim 6, wherein: a middle connecting pipe is arranged in a central hole of the middle clamping cone, a middle clamping tile ratchet is arranged on the periphery of the middle connecting pipe, a middle clamping tile ratchet ring is arranged on an inner step at the upper end of the middle clamping cone, and the middle slip ratchet ring is clamped on the middle slip ratchet; the periphery of the upper portion of the middle slip ratchet ring is provided with a middle slip ratchet ring clamping sleeve, the lower end of the middle slip ratchet ring clamping sleeve abuts against an inner step of the middle slip cone, the periphery of the middle slip ratchet ring clamping sleeve is screwed in a female thread on the upper portion of the middle slip cone, the top of the middle slip cone is provided with a common hydraulic cavity, the periphery of the upper portion of the middle connecting pipe is provided with a middle connecting pipe bypass hole communicated with the common hydraulic cavity, and the upper end of the middle connecting pipe is screwed at the lower end of the upper anti-slip mechanism.

8. The pitch-free anchored setting mechanism of claim 7, wherein: the anti-slip upper slip mechanism comprises an upper slip outer cylinder connected with a middle slip outer cylinder into a whole, the upper slip outer cylinder and the middle slip outer cylinder are separated from each other through an inner boss, an upper slip cone with an upward small end is arranged in the inner cavity of the upper slip outer cylinder, the lower cylindrical section of the upper slip cone is sealed with the inner wall of the upper slip outer cylinder through a sealing ring, an upper slip is sleeved on the outer conical surface of the upper portion of the upper slip cone, and the anti-slip surface of the upper slip is embedded in an upper embedding groove of the upper slip outer cylinder; the upper end of the central hole of the upper clamping cone is connected with an upper pressure transmission pipe in an inserted mode, the upper end of the upper pressure transmission pipe is communicated with the central hole of the inclined body connector and is connected with the central hole of the inclined body connector into a whole, the lower circumference of the inclined body connector is connected in the upper port of the upper clamping slip outer barrel in a screwed mode, and the upper circumference of the inclined body connector is connected with the bottom of the large end of the inclined body in a screwed mode.

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