CN116517500A - Float collar float shoe with multiple sealing functions for well cementation construction - Google Patents
Float collar float shoe with multiple sealing functions for well cementation construction Download PDFInfo
- Publication number
- CN116517500A CN116517500A CN202310801520.1A CN202310801520A CN116517500A CN 116517500 A CN116517500 A CN 116517500A CN 202310801520 A CN202310801520 A CN 202310801520A CN 116517500 A CN116517500 A CN 116517500A
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- Prior art keywords
- sealing
- sliding
- shell
- plate
- fixedly connected
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- 238000007789 sealing Methods 0.000 title claims abstract description 228
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 230000008878 coupling Effects 0.000 claims abstract description 40
- 238000010168 coupling process Methods 0.000 claims abstract description 40
- 238000005859 coupling reaction Methods 0.000 claims abstract description 40
- 238000007667 floating Methods 0.000 claims abstract description 18
- 238000001125 extrusion Methods 0.000 claims description 42
- 239000004568 cement Substances 0.000 claims description 38
- 230000007246 mechanism Effects 0.000 claims description 26
- 238000003825 pressing Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 7
- 239000010720 hydraulic oil Substances 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 239000002002 slurry Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/14—Casing shoes for the protection of the bottom of the casing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to the technical field of cementing tools, and discloses a float collar float shoe with multiple sealing functions for cementing construction. Including the connection shell, the inner wall rigid coupling of connection shell has the disk seat, the middle part of disk seat is provided with the through-hole, the inner wall rigid coupling of connection shell has first fixed plate, first fixed plate is located the below of disk seat, first fixed plate sliding connection has first slide bar, the upper portion rigid coupling of first slide bar has first limiting plate, first slide bar rigid coupling has the case, case sliding connection has the seal shell, the rigid coupling has the second elastic component between seal shell and the first limiting plate, the downside of disk seat is provided with annular groove, the annular groove sliding fit of seal shell and disk seat, sliding connection has the sealing ring in the annular groove of disk seat, the disk seat is provided with equidistant arc through-hole in circumference, sliding connection has first limiting rod in the arc through-hole. According to the floating collar float shoe, the sealing shell and the valve core are matched with the valve seat, so that multiple sealing is carried out on the through hole of the valve seat, and the sealing performance of the floating collar float shoe is improved.
Description
Technical Field
The invention relates to the technical field of cementing tools, and discloses a float collar float shoe with multiple sealing functions for cementing construction.
Background
The well cementation is an important process in petroleum exploration and development, wherein cement paste is injected and solidified, safety and stability of an oil well are guaranteed through solidification of the cement paste, a floating collar floating shoe is one of petroleum drilling and production equipment accessories, the floating collar floating shoe is a necessary tool for well cementation construction to effectively perform well cementation operation, the floating collar floating shoe can ensure that the cement paste is injected to a preset position, a firm well cementation ring is formed, and integrity and safety of a shaft are guaranteed.
Most of the existing float collar float shoes are used for sealing by pushing the sealing ball and the valve seat through the springs so as to prevent cement paste from flowing back into the sleeve, however, the existing float collar float shoes are used for a long time, cement paste flows to impact the sealing ball and the valve seat, so that the sealing ball and the valve seat are worn, and the sealing property between the sealing ball and the valve seat is reduced.
Disclosure of Invention
In order to overcome the defects in the background art, the invention provides a float collar float shoe with multiple sealing functions for well cementation construction.
The technical scheme of the invention is as follows: the utility model provides a well cementation construction is with floating collar floating shoes that has multiple sealing function, including the coupling shell, the inner wall rigid coupling of coupling shell has the disk seat, the middle part of disk seat is provided with the through-hole, the inner wall rigid coupling of coupling shell has first fixed plate, first fixed plate is located the below of disk seat, first fixed plate sliding connection has first slide bar, the upper portion rigid coupling of first slide bar has first limiting plate, first slide bar cover is equipped with first elastic component, the both ends of first elastic component are respectively with first limiting plate and first fixed plate rigid coupling, first slide bar rigid coupling has the case, the case is used for sealing the through-hole of disk seat, case sliding connection has the sealing shell, the rigid coupling has the second elastic component between sealing shell and the first limiting plate, the downside of disk seat is provided with the annular groove, sealing shell and the annular groove sliding fit of disk seat, the annular groove sliding connection of disk seat has the sealing ring, the disk seat is provided with equidistant arc through-shaped through-hole of circumference, equidistant arc through-shaped through-hole all communicates with the annular groove of disk seat, the sliding connection has first gag lever, the lower extreme and rigid coupling of first gag lever.
Further, the valve core is arranged in a truncated cone shape, a circular shoulder is arranged on the lower side of the valve core, an inclined surface is arranged at the lower part of the valve seat through hole and used for increasing the contact area between the valve core and the valve seat, and the diameter of the lower part of the valve core is larger than that of the valve seat through hole.
Further, the outer wall of the sealing shell gradually widens from the middle part to the lower part, so that the sealing effect of the sealing shell and the annular groove of the valve seat is improved.
Further, the upper end of the first limiting rod is provided with a limiting block for limiting the sealing ring.
Further, still including the forced induction mechanism that is used for extrudeing the seal shell, forced induction mechanism sets up in the disk seat, forced induction mechanism is including the second slide bar that has symmetrical distribution, the upside of disk seat is provided with symmetrical first recess, the downside of disk seat is provided with symmetrical second recess, the disk seat is provided with symmetrical first cavity, first cavity is located between adjacent first recess and the second recess, symmetrical second slide bar sliding connection is in the disk seat, second slide bar passes adjacent first recess, second recess and first cavity, second slide bar and disk seat sealing fit, first recess sliding connection and sealing fit have first closing plate, first closing plate and adjacent second slide bar rigid coupling, second recess sliding connection and sealing fit have the second closing plate, the second closing plate passes adjacent second closing plate, first cavity is connected with the second limiting plate, second slide bar passes adjacent second limiting plate, be provided with the damping between second limiting plate and the disk seat, second limiting plate and adjacent second slide bar and second side sliding connection have first closing plate and second elastic sealing plate, the both ends of second side extrusion seal piece are provided with the seal plate respectively, the seal piece is used for the seal mounting panel is connected with the second side of extrusion.
Further, the extrusion limiting assembly comprises symmetrically distributed sliding rails, the symmetrically distributed sliding rails are fixedly connected to the lower sides of valve seats, the extrusion plates are connected with extrusion plates in a sliding mode, the extrusion plates are provided with inclined grooves and used for extruding sealing shells, connecting frames are fixedly connected to the inner ring surfaces of the connecting rings, second limiting rods are fixedly connected to the connecting frames, and the second limiting rods are connected with the inclined grooves of the adjacent extrusion plates in a sliding mode.
Further, the pressing plate is arranged in a wedge shape and is used for increasing the pressing force of the sealing shell and the annular groove of the valve seat.
Further, the valve core is characterized by further comprising an extrusion positioning mechanism for preventing cement paste from being accumulated between the sealing shell and the valve core, the extrusion positioning mechanism is arranged on the valve core and comprises a third sliding rod, the third sliding rod is connected with the first sliding rod in a sliding mode, the third sliding rod penetrates through the valve core and is connected with the valve core in a sliding mode and is matched with the valve core in a sealing mode, a third groove is formed in the upper side of the valve core, a third sealing plate is connected with the third groove in a sliding mode in a sealing mode, a closed cavity is formed in the third sealing plate and the third groove in a matched mode, hydraulic oil is filled in the cavity of the third sealing plate and the third groove, the third sealing plate is fixedly connected with the third sliding rod, the valve core is provided with a symmetrical second cavity, the symmetrical second cavity is communicated with the third groove, the second cavity is connected with a fourth sealing plate in a sliding mode, and the fourth sliding rod is fixedly connected with the fourth sliding rod in a sliding mode and penetrates through the valve core and is fixedly connected with the sealing shell.
Further, still including the location fixed establishment who reduces first elastic component fatigue, location fixed establishment sets up in first fixed plate, location fixed establishment is including the fixed shell, the fixed shell rigid coupling is in the lower extreme of first slide bar, sliding connection has the seal post in the fixed shell, the lower extreme of third slide bar passes the fixed shell and with seal post rigid coupling, the downside rigid coupling of first fixed plate has the deflector of symmetric distribution, the deflector is provided with the spout, the outside rigid coupling of fixed shell has the fixed block of symmetry, the spout sliding connection of fixed block and adjacent deflector, the fixed shell is provided with the locating component with deflector spacing complex.
Further, the locating component is including the guiding shell that the symmetry distributes, the guiding shell that the symmetry distributes all rigid coupling in the fixed shell, the fixed shell is provided with the blind hole with adjacent guiding shell intercommunication, sliding connection has first sliding block and second sliding block in the guiding shell, rigid coupling has the fourth elastic component between first sliding block and the fixed shell, rigid coupling has the fifth elastic component between first sliding block and the adjacent second sliding block, the lower part of deflector is provided with the through-hole, the spacing cooperation of through-hole of second sliding block and adjacent deflector, the lower part of guiding shell is provided with the spout, sliding connection has the spliced pole in the spout of guiding shell, the spliced pole is with adjacent first sliding block rigid coupling, the lower extreme rigid coupling of spliced pole has the second fixed plate, second fixed plate and sealing column extrusion fit.
Compared with the prior art, the invention has the following advantages:
1. through the cooperation of seal shell and case and disk seat, carry out multiple sealing to the through-hole of disk seat, improve the leakproofness of this float collar float shoe.
2. The connecting ring drives the second limiting rod to upwards extrude the adjacent extrusion plate through the connecting frame, the extrusion plate further extrudes the downside of the sealing shell, the extrusion force of the annular groove of the sealing shell for upwards extruding the valve seat is increased, and then the tightness between the sealing shell and the valve seat is improved.
3. The third sealing plate is extruded by cement paste, so that the upper side surface of the sealing shell is flush with the shoulder of the valve core, cement paste is prevented from impacting a gap between the valve core and the sealing shell in the process of pouring cement paste into the sleeve, and abrasion of the valve core and the sealing shell is reduced.
4. Through the cooperation of second sliding block and adjacent direction shell, fix fixed shell and first slide bar, prevented to produce pressure fluctuation at the injection in-process of grout, cause first slide bar atress to produce the change and lead to its upper and lower slip, lead to the reciprocal compression elasticity of first elastic component to reduce.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a schematic perspective sectional view of the connecting housing and valve seat of the present invention.
FIG. 3 is a schematic perspective view of a cross-section of a valve cartridge, a seal housing and a first slide bar of the present invention.
Fig. 4 is a schematic perspective view of a pressure sensing mechanism according to the present invention.
Fig. 5 is a schematic perspective view of the extrusion plate and the connecting frame of the present invention.
Fig. 6 is a schematic perspective view of the extrusion positioning mechanism of the present invention.
Fig. 7 is a schematic cross-sectional perspective view of the positioning and fixing mechanism of the present invention.
Fig. 8 is an enlarged perspective view of fig. 7 a according to the present invention.
The marks of the components in the drawings are as follows: 1: connection shell, 2: valve seat, 3: first fixed plate, 4: first slide bar, 5: first limiting plate, 6: first elastic member, 7: valve core, 8: sealing shell, 9: second elastic member, 10: sealing ring, 11: arc through hole, 12: first gag lever post, 13: first groove, 14: second groove, 15: first cavity, 16: second slide bar, 17: first sealing plate, 18: second sealing plate, 19: second limiting plate, 20: third elastic member, 21: connection ring, 22: slide rail, 23: extrusion plate, 24: connecting frame, 241: second gag lever post, 25: third groove, 26: third slide bar, 27: third seal plate, 28: second cavity, 29: fourth sealing plate, 30: fourth slide bar, 31: fixed shell, 32: sealing post, 33: guide plate, 34: fixed block, 35: guide shell, 36: first slider, 361: fourth elastic member, 37: second slider, 38: fifth elastic member, 39: connection post, 40: and a second fixing plate.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description. The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Example 1: 1-3, including connecting shell 1, connecting shell 1's inner wall rigid coupling has disk seat 2, disk seat 2's middle part is provided with the through-hole, connecting shell 1's inner wall rigid coupling has first fixed plate 3, first fixed plate 3 is located disk seat 2's below, the in-process of injecting cement paste, cement paste flows downwards through disk seat 2's through-hole, first fixed plate 3 sliding connection has first slide bar 4, first slide bar 4's upper portion rigid coupling has first limiting plate 5, first slide bar 4 cover is equipped with first elastic component 6, first elastic component 6 sets up to the spring, first elastic component 6's both ends respectively with first limiting plate 5 and first fixed plate 3 rigid coupling, first slide bar 4 rigid coupling has case 7, when stopping injecting cement paste, under the elasticity effect of first elastic component 6, case 7 upwards moves, the through hole of the valve seat 2 is sealed, the valve core 7 is in a truncated cone shape, the lower side of the valve core 7 is provided with a circular shoulder, the circular shoulder of the valve core 7 is used for increasing the contact area with the valve seat 2, the tightness between the valve core 7 and the valve seat 2 is improved, the lower part of the through hole of the valve seat 2 is provided with an inclined surface for increasing the contact area between the valve core 7 and the valve seat 2, the diameter of the lower part of the valve core 7 is larger than that of the through hole of the valve seat 2, the upper part of the valve core 7 is inserted into the through hole of the valve seat 2, the valve core 7 is used for sealing the through hole of the valve seat 2, the valve core 7 is slidingly connected with a sealing shell 8, a second elastic piece 9 is fixedly connected between the sealing shell 8 and the first limiting plate 5, the sealing shell 8 always upwards extrudes the valve seat 2 by utilizing the elastic force of the second elastic piece 9, the lower side of the valve seat 2 is provided with an annular groove, the sealing shell 8 is slidingly matched with the annular groove of the valve seat 2, the outer wall of seal shell 8 widens gradually from the middle part to the lower part, seal shell 8 directly extrudees in disk seat 2 annular groove department, seal shell 8 cooperates with case 7, carry out double seal to disk seat 2's through-hole, further promote seal shell 8 and disk seat 2 annular groove's sealed effect, sliding connection has sealing ring 10 in disk seat 2's the annular groove, sealing ring 10 is used for preventing that grout from entering into disk seat 2's annular groove, influence seal shell 8 and disk seat 2's annular groove cooperation, disk seat 2 is provided with equidistant arc through-hole 11 in circumference, equidistant arc through-hole 11 in circumference communicates with the annular groove of samely disk seat 2, the sliding connection has first gag lever 12 in arc through-hole 11, the upper end of first gag lever 12 is provided with the stopper for spacing to sealing ring 10, the lower extreme and the rigid coupling of sealing ring 10 of first gag lever 12, the mud of injection makes sealing ring 10 downside and disk seat 2's downside parallel and level through arc through-hole 11 under the effect of first gag lever 12 upper end stopper simultaneously.
When the device is used for cementing wells, cement slurry is injected into wells by workers, the valve core 7 is extruded downwards through the valve seat 2, the valve core 7 moves downwards to relieve the sealing of the through hole of the valve seat 2, in the process of the downward movement of the valve core 7, the valve core 7 drives the sealing shell 8 to move downwards, the sealing shell 8 moves downwards along the annular groove of the valve seat 2, meanwhile, the cement slurry on the upper side of the valve seat 2 is extruded downwards through the arc-shaped through hole 11 to extrude the sealing ring 10, the sealing ring 10 moves downwards along the annular groove of the valve seat 2 after being extruded, when the limiting block on the upper end of the first limiting rod 12 is contacted with the upper side of the valve seat 2, the lower side of the sealing ring 10 is flush with the lower side of the valve seat 2 at the moment, in an initial stage, the second elastic piece 9 is in a compressed state, when no cement slurry is injected, the lower side of the valve core 7 is not contacted with the sealing shell 8, the lower side of the sealing shell 8 slides downwards under the extrusion force of the cement slurry, the sealing shell 8 slides downwards along the valve core 7 until the upper side of the sealing shell 8 is further compressed, the upper side of the sealing shell 8 is flush with the circular upper side of the valve core 7, the lower side of the sealing shell 7 is driven by the sealing shell 7, and other elastic pieces are connected with the valve seat 4, and the lower side of the sealing shell 4 is connected with the lower side of the sealing shell 4, and the sealing shell 4 is pushed downwards, the sealing shell is pushed by the sealing shell 4, and the sealing shell is pushed by the sealing rod is pushed by the lower side of the sealing rod, and the sealing rod is pushed, and the sealing 4 is and is pushed and is discharged.
After the cement paste is stopped to be injected into the sleeve by workers, the cement paste stops flowing downwards, under the action of the elastic force of the first elastic piece 6, the first sliding rod 4 drives the valve core 7 and other parts on the valve core 7 to move upwards, meanwhile, under the action of the elastic force of the second elastic piece 9, the sealing shell 8 moves upwards along the first sliding rod 4 until the sealing shell 8 contacts with the lower side surface of the valve core 7, then the valve core 7 seals the through hole of the valve seat 2 again, meanwhile, the sealing shell 8 moves upwards along the annular groove of the valve seat 2, the sealing shell 8 pushes the sealing ring 10 to move upwards for resetting, when the outer wall of the sealing shell 8 presses on the valve seat 2, the sealing shell 8 stops moving upwards, but under the action of the elastic force of the first elastic piece 6, the first sliding rod 4 drives the valve core 7 and the first limiting plate 5 to move upwards until the circular shoulder of the valve core 7 contacts with the lower side of the valve seat 2, the valve core 7 seals the through hole of the valve seat 2 again, under the elastic force of the second elastic piece 9 compresses again, the sealing shell 8 presses the annular groove of the valve seat 2 again, and the sealing shell 8 is pushed to move upwards through the annular groove of the sealing shell 8 and the sealing ring 7 and the valve seat 2 again.
Example 2: on the basis of the embodiment 1, as shown in fig. 4 and 5, the device further comprises a pressure sensing mechanism for extruding the sealing shell 8, the pressure sensing mechanism is arranged on the valve seat 2, the pressure sensing mechanism comprises two second sliding rods 16 symmetrically distributed, two symmetrical first grooves 13 are arranged on the upper side of the valve seat 2, two symmetrical second grooves 14 are arranged on the lower side of the valve seat 2, the first grooves 13 correspond to the adjacent second grooves 14 up and down, the valve seat 2 is provided with two symmetrical first cavities 15, the first cavities 15 are positioned between the adjacent first grooves 13 and the second grooves 14, the two symmetrical second sliding rods 16 are slidably connected with the valve seat 2, the second sliding rods 16 are in sealing fit with the valve seat 2, the second sliding rods 16 penetrate through the adjacent first grooves 13, the second grooves 14 and the first cavities 15, the second sliding rods 16 are in sealing fit with the valve seat 2, the sealing performance of the device is improved, the first groove 13 is in sliding connection and is in sealing fit with a first sealing plate 17, in an initial state, the upper side surface of the first sealing plate 17 is lower than the upper side surface of the valve seat 2, the first sealing plate 17 is fixedly connected with an adjacent second sliding rod 16, the second groove 14 is in sliding connection and is in sealing fit with a second sealing plate 18, the second sealing plate 18 is fixedly connected with the adjacent second sliding rod 16, when the second sliding rod 16 moves up and down, the first sealing plate 17 and the second sealing plate 18 are driven to move synchronously, the second sliding rod 16 passes through the adjacent second sealing plate 18, the first cavity 15 is in sliding connection with a second limiting plate 19, the second sliding rod 16 passes through the adjacent second limiting plate 19, a damping is arranged between the second limiting plate 19 and the valve seat 2 and is used for slowing down the reset speed of the second sliding rod 16, the second limiting plate 19 is fixedly connected with the adjacent second sliding rod 16, the first cavity 15 is internally provided with a third elastic piece 20, two ends of the third elastic piece 20 are fixedly connected with the valve seat 2 and the adjacent second limiting plates 19 respectively, when cement slurry is injected, the first sealing plate 17 is extruded by the cement slurry, the first sealing plate 17 moves downwards along the first groove 13, the lower ends of the symmetrical second sliding rods 16 are fixedly connected with connecting rings 21 through mounting plates, and an extrusion limiting assembly used for extruding the sealing shell 8 is arranged on the lower side of the valve seat 2.
As shown in fig. 5, the extrusion limiting component comprises two symmetrically distributed slide rails 22, the two symmetrically distributed slide rails 22 are fixedly connected to the lower side of the valve seat 2, an extrusion plate 23 is slidably connected to the slide rails 22, the extrusion plate 23 is wedge-shaped and used for increasing extrusion force of the sealing shell 8 and the annular groove of the valve seat 2, the extrusion plate 23 is provided with an inclined groove, the extrusion plate 23 is used for extruding the sealing shell 8, the two extrusion plates 23 are mutually close to the lower side of the sealing shell 8, the tightness between the sealing shell 8 and the valve seat 2 is improved, a connecting frame 24 is fixedly connected to the inner ring surface of the connecting ring 21, a second limiting rod 241 is fixedly connected to the connecting frame 24, and the second limiting rod 241 slides along the inclined groove of the adjacent extrusion plate 23 and is used for changing the position of the extrusion plate 23.
When the staff starts to inject cement paste into the sleeve, the cement paste downwards extrudes the valve core 7, in an initial state, two extrusion plates 23 are positioned on the lower side of the sealing shell 8, the upper side surface of the first sealing plate 17 is lower than the upper side surface of the valve seat 2, the injected cement paste downwards extrudes the two first sealing plates 17, the first sealing plates 17 downwards slide along the first grooves 13, the two first sealing plates 17 respectively drive the corresponding second sliding rods 16 to downwards move, the two second sliding rods 16 respectively drive the second sealing plates 18 and the second limiting plates 19 on the two second sliding rods to downwards move, the second sealing plates 18 downwards slide along the adjacent second grooves 14, the second limiting plates 19 downwards move along the adjacent first cavities 15, meanwhile, the third elastic piece 20 is compressed, then the lower side surfaces of the first sealing plates 17 are in contact with the valve seat 2, the lower side surfaces of the second sealing plates 18 are flush with the lower side surfaces of the valve seat 2, in the process, the connecting rings 21 are synchronously downwards moved when the two second sliding rods 16 downwards move, the connecting rings 21 drive the two second sliding rods 241 to downwards through the two connecting frames 24 respectively, the second limiting plates 241 downwards move along the second sliding rods 241, the second limiting plates 241 downwards move along the adjacent sealing shell 8, the effect of the sealing shell is removed, and the cement paste is downwards moved along the sealing shell 8, and the effect of the sealing shell is removed.
When the cement slurry injection is stopped, the valve core 7 and the sealing shell 8 are sealed to the through hole of the valve seat 2 again, at this moment, under the action of the elastic force of the third elastic piece 20, the second sliding rod 16 drives other parts on the valve core to reset upwards, because damping exists between the second limiting plate 19 and the valve seat 2, the second sliding rod 16 resets upwards slowly, the cement slurry at the lower side of the valve seat 2 upwards presses the two second sealing plates 18 at this moment, both the two second sealing plates 18 are subjected to upward extrusion force, the connecting ring 21 is pulled upwards by the two second sliding rods 16, at this moment, the connecting ring 21 drives the second limiting rod 241 to upwards press the adjacent pressing plates 23 through the connecting frame 24, the two pressing plates 23 move close to each other until the two pressing plates 23 reset and re-press at the lower side of the sealing shell 8, the two pressing plates 23 further press the lower side of the sealing shell 8, the extrusion force of the annular groove of the sealing shell 8 upwards pressing the valve seat 2 is increased, and the sealing performance between the sealing shell 8 and the valve seat 2 is improved.
Example 3: on the basis of embodiment 2, as shown in fig. 6, the device further comprises an extrusion positioning mechanism for preventing cement slurry from being accumulated between the sealing shell 8 and the valve core 7, the extrusion positioning mechanism is arranged on the valve core 7, the extrusion positioning mechanism comprises a third sliding rod 26, the third sliding rod 26 is slidably connected with the first sliding rod 4, the third sliding rod 26 passes through the valve core 7 and is slidably connected with the valve core 7 and is in sealing fit with the valve core, a third groove 25 is arranged on the upper side of the valve core 7, the third groove 25 is slidably connected with a third sealing plate 27 in sealing fit, when cement slurry is injected, the third sealing plate 27 moves downwards along the third groove 25, the third sealing plate 27 and the third groove 25 are matched to form a closed cavity, hydraulic oil is filled in the cavities of the third sealing plate 27 and the third groove 25, the third sealing plate 27 is fixedly connected with the third sliding rod 26, the valve core 7 is provided with two symmetrical second cavities 28, the two symmetrical second cavities 28 are all communicated with the third groove 25, the third sealing plate 27 moves downwards along the third groove 25, hydraulic oil in the third groove 25 is pressed into the two second cavities 28, the fourth sealing plate 28 is slidably connected with the fourth sealing plate 29, and the fourth sealing plate 29 is slidably connected with the fourth sealing plate 28 along the fourth groove 28, and the fourth sealing plate 29 is fixedly connected with the fourth sealing plate 28 along the fourth sliding rod, and the fourth sealing plate 28 moves downwards along the fourth sealing plate and the fourth sealing plate 28.
When cement slurry is injected into the sleeve, the cement slurry presses the third sealing plate 27 downwards, the third sealing plate 27 slides downwards along the third groove 25, hydraulic oil in the third groove 25 is pressed into the two second cavities 28, the hydraulic oil pressure in the second cavities 28 is increased and presses the fourth sealing plate 29 downwards, the fourth sealing plate 29 drives the fourth sliding rod 30 fixedly connected with the fourth sealing plate 29 to move downwards, the fourth sliding rod 30 drives the sealing shell 8 to move downwards along the first sliding rod 4, the second elastic piece 9 is compressed, then the third sealing plate 27 stops moving downwards, the upper side face of the sealing shell 8 is flush with the circular shoulder of the valve core 7 at the moment, the second elastic piece 9 is always in a compressed state in the process of pouring cement slurry into the sleeve, the gap between the valve core 7 and the sealing shell 8 is prevented from being impacted by the cement slurry in the process of pouring cement slurry into the sleeve, and abrasion of the valve core 7 and the sealing shell 8 is further reduced.
Example 4: on the basis of embodiment 3, as shown in fig. 7 and 8, the device further comprises a positioning and fixing mechanism for reducing fatigue of the first elastic piece 6, the positioning and fixing mechanism is arranged on the first fixing plate 3, the positioning and fixing mechanism comprises a fixing shell 31, the fixing shell 31 is fixedly connected to the lower end of the first sliding rod 4, when the first sliding rod 4 moves downwards, the fixing shell 31 and other parts thereon are driven to synchronously move downwards, a sealing post 32 is slidably connected in the fixing shell 31, the lower end of a third sliding rod 26 passes through the fixing shell 31 and is fixedly connected with the sealing post 32, when cement slurry is injected, the third sealing plate 27 moves downwards along the third groove 25, the third sealing plate 27 drives the sealing post 32 to move downwards through the third sliding rod 26, two symmetrically distributed guide plates 33 are fixedly connected to the lower side of the first fixing plate 3, sliding grooves are formed in the guide plates 33, two symmetrical fixing blocks 34 are fixedly connected to the outer side of the fixing shell 31, the fixing blocks 34 are slidably connected with the sliding grooves of the adjacent guide plates 33, and the fixing shell 31 moves downwards along the two guide plates 33 through the two fixing blocks 34, and the positioning assembly is arranged in a limit fit with the guide plate 31.
As shown in fig. 8, the positioning assembly includes two symmetrically distributed guide shells 35, the two symmetrically distributed guide shells 35 are fixedly connected to the fixed shell 31, the fixed shell 31 is provided with blind holes communicated with the adjacent guide shells 35, a first sliding block 36 and a second sliding block 37 are slidably connected in the guide shells 35, a fourth elastic member 361 is fixedly connected between the first sliding block 36 and the fixed shell 31, the fourth elastic member 361 is provided with a tension spring, a fifth elastic member 38 is fixedly connected between the first sliding block 36 and the adjacent second sliding block 37, the fifth elastic member 38 is provided with a spring, the lower part of the guide plate 33 is provided with a through hole, the second sliding block 37 is in limit fit with the through hole of the adjacent guide plate 33, after the second sliding block 37 is inserted into the adjacent through hole on the guide plate 33, the first sliding rod 4 and the valve core 7 are fixed, the first elastic member 6 is prevented from being reciprocally compressed by cement paste pressure fluctuation, the lower part of the guide shell 35 is provided with a sliding groove, the sliding groove of the guide shell 35 is slidably connected with a connecting column 39, the connecting column 39 is fixedly connected with the sliding groove of the first sliding groove, the connecting column 39 is in the second sliding groove, the lower end of the second sliding groove is fixedly connected with the second sliding column 40, the lower end 40 of the second sliding column is far from the second sliding column is fixedly connected with the second sealing column 32, and the lower end 40 is far away from the fixed column 32.
In the process of downward movement of the first sliding rod 4, the first sliding rod 4 drives the fixed shell 31 to move downward, the fixed shell 31 drives the two fixed blocks 34 to move downward along the sliding grooves of the adjacent guide plates 33 respectively, after the third sealing plate 27 is extruded, the third sealing plate 27 drives the third sliding rod 26 to move downward, the third sliding rod 26 pushes the sealing column 32 downward, the sealing column 32 moves downward along the fixed shell 31, the sealing column 32 moves downward and extrudes the two second fixed plates 40, the two second fixed plates 40 slide along the outer sides of the sealing column 32, the two second fixed plates 40 drive the adjacent first sliding blocks 36 to slide along the adjacent guide shells 35 respectively through the adjacent connecting columns 39, the first sliding blocks 36 move to the side close to the adjacent second sliding blocks 37, the fifth elastic pieces 38 between the first sliding blocks 36 and the adjacent second sliding blocks 37 are compressed, the fourth elastic member 361 is stretched, and then the second sliding blocks 37 press the guide plates 33, and as the first sliding rod 4 moves downward, the two second sliding blocks 37 move downward along the sliding grooves of the adjacent guide plates 33 respectively until the first sliding rod 4 and the valve core 7 move to the designated positions, at this time, the second sliding blocks 37 are positioned at the through holes of the adjacent guide plates 33, under the elastic force of the fifth elastic member 38, the second sliding blocks 37 are inserted into the through holes of the adjacent guide plates 33, and the fixing shell 31 and the first sliding rod 4 are fixed by the cooperation of the second sliding blocks 37 and the through holes of the adjacent guide plates 33, so that pressure fluctuation is prevented from being generated in the cement slurry injection process, and the first sliding rod 4 is prevented from sliding up and down due to the stress variation, so that the reciprocating compression elastic force of the first elastic member 6 is reduced.
When the cement slurry is stopped from being injected into the sleeve, under the action of the elastic force of the second elastic piece 9, the sealing shell 8 slides upwards to reset, the two fourth sliding rods 30 respectively drive the fourth sealing plates 29 fixedly connected with the fourth sliding rods to slide upwards, hydraulic oil in the two second cavities 28 is flushed and pressed into the third grooves 25, the third sealing plates 27 are extruded and then move upwards, the third sealing plates 27 drive the sealing columns 32 to move upwards to reset through the third sliding rods 26, the sealing columns 32 do not extrude the two second fixing plates 40 any more, under the action of the tensile force of the fourth elastic piece 361, the first sliding blocks 36 and other parts on the first sliding blocks are reset, the second sliding blocks 37 lose fit with the through holes of the adjacent guide plates 33, then under the action of the elastic force of the first elastic piece 6, the first sliding rods 4 and other parts on the first sliding blocks move upwards, and the valve cores 7 and the sealing shell 8 seal the through holes of the valve seat 2 again.
The foregoing has outlined rather broadly the more detailed description of the present application, wherein specific examples have been provided to illustrate the principles and embodiments of the present application, the description of the examples being provided solely to assist in the understanding of the method of the present application and the core concepts thereof; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (10)
1. The utility model provides a well cementation construction is with floating collar floating shoes that has multiple sealing function, including coupling shell (1), coupling shell (1) inner wall rigid coupling has disk seat (2), disk seat (2) middle part is provided with the through-hole, coupling shell (1) inner wall rigid coupling has first fixed plate (3), first fixed plate (3) are located disk seat (2) below, first fixed plate (3) sliding connection has first slide bar (4), first slide bar (4) upper portion rigid coupling has first limiting plate (5), first slide bar (4) cover is equipped with first elastic component (6), first elastic component (6) both ends respectively with first limiting plate (5) and first fixed plate (3) rigid coupling, characterized by, disk core (7) rigid coupling is in first slide bar (4), disk core (7) are used for sealing disk seat (2)'s through-hole, disk core (7) sliding connection has sealing shell (8), sealing shell (8) and first limiting plate (5) between rigid coupling have second elastic component (9), disk seat (2) side sealing ring groove (2) are provided with annular groove (11) and annular groove (2) are provided with, annular groove (11) and the annular groove (2) is provided with circumference, disk seat (2) are connected, the arc through holes (11) with equal intervals in the circumferential direction are communicated with the annular groove of the valve seat (2), a first limiting rod (12) is connected in a sliding manner in the arc through holes (11), and the lower end of the first limiting rod (12) is fixedly connected with the sealing ring (10).
2. The float collar float shoe with multiple sealing functions for well cementation construction according to claim 1, wherein the valve core (7) is in a truncated cone shape, a circular shoulder is arranged on the lower side of the valve core, an inclined surface is arranged on the lower portion of a through hole of the valve seat (2) and used for increasing the contact area between the valve core (7) and the valve seat (2), and the diameter of the lower portion of the valve core (7) is larger than that of the through hole of the valve seat (2).
3. A float collar float shoe with multiple sealing functions for well cementation construction according to claim 1, characterized in that the outer wall of the sealing shell (8) is gradually widened from the middle part to the lower part, and the float collar float shoe is used for improving the sealing effect of the sealing shell (8) and the annular groove of the valve seat (2).
4. The floating collar shoes with multiple sealing functions for well cementation construction according to claim 1, wherein a limiting block is arranged at the upper end of the first limiting rod (12) and used for limiting the sealing ring (10).
5. The floating shoe with multiple sealing functions for well cementation construction according to claim 1, further comprising a pressure sensing mechanism for extruding the sealing shell (8), wherein the pressure sensing mechanism is arranged on the valve seat (2), the pressure sensing mechanism comprises a second sliding rod (16) which is symmetrically distributed, the upper side of the valve seat (2) is provided with a first symmetrical groove (13), the lower side of the valve seat (2) is provided with a second symmetrical groove (14), the valve seat (2) is provided with a first symmetrical cavity (15), the first cavity (15) is positioned between the adjacent first groove (13) and the second groove (14), the second symmetrical sliding rod (16) is connected with the valve seat (2) in a sliding manner, the second sliding rod (16) passes through the adjacent first groove (13), the second groove (14) and the first cavity (15), the second sliding rod (16) is in sealing fit with the valve seat (2), the first sliding rod (17) is in sliding connection with the first sliding rod (17), the first sliding rod (17) is in sliding fit with the adjacent second sliding rod (16), the second sliding rod (16) is connected with the second sliding rod (18) in a sliding manner, the second sliding rod (18) is fixedly connected with the second sealing plate (18) in a sliding manner, the first cavity (15) is internally and slidably connected with a second limiting plate (19), a second sliding rod (16) penetrates through the adjacent second limiting plate (19), damping is arranged between the second limiting plate (19) and the valve seat (2), the second limiting plate (19) is fixedly connected with the adjacent second sliding rod (16), a third elastic piece (20) is arranged in the first cavity (15), two ends of the third elastic piece (20) are fixedly connected with the valve seat (2) and the adjacent second limiting plate (19) respectively, connecting rings (21) are fixedly connected to the lower ends of the symmetrical second sliding rods (16) through mounting plates, and an extrusion limiting assembly used for extruding the sealing shell (8) is arranged on the lower side of the valve seat (2).
6. The floating shoe with the multiple sealing functions for well cementation construction according to claim 5, wherein the extrusion limiting assembly comprises symmetrically distributed sliding rails (22), the symmetrically distributed sliding rails (22) are fixedly connected to the lower side of the valve seat (2), the sliding rails (22) are slidably connected with extrusion plates (23), the extrusion plates (23) are provided with inclined grooves, the extrusion plates (23) are used for extruding the sealing shell (8), the inner ring surface of the connecting ring (21) is fixedly connected with connecting frames (24), the connecting frames (24) are fixedly connected with second limiting rods (241), and the second limiting rods (241) are slidably connected with the inclined grooves of the adjacent extrusion plates (23).
7. A float collar float shoe with multiple sealing function for well cementation construction according to claim 6, characterized in that the pressing plate (23) is arranged in a wedge shape for increasing the pressing force of the annular groove of the sealing shell (8) and the valve seat (2).
8. The float collar float shoe with multiple sealing functions for well cementation construction according to claim 1, further comprising an extrusion positioning mechanism for preventing cement paste from being accumulated between the sealing shell (8) and the valve core (7), wherein the extrusion positioning mechanism is arranged in the valve core (7), the extrusion positioning mechanism comprises a third sliding rod (26), the third sliding rod (26) is slidably connected with the first sliding rod (4), the third sliding rod (26) penetrates through the valve core (7) and is slidably connected with the valve core and is in sealing fit with the valve core, a third groove (25) is arranged on the upper side of the valve core (7), a third sealing plate (27) is slidably connected with the third groove (25) and is in sealing fit with the third groove (25), a closed cavity is formed by the third sealing plate (27) and the third groove (25), hydraulic oil is filled in the cavity of the third sealing plate (27) and the third groove (25), the third sealing plate (27) is fixedly connected with the third sliding rod (26), the valve core (7) is provided with a symmetrical second cavity (28), the symmetrical second cavity (28) is communicated with the third groove (25), the fourth sealing plate (29) is slidably connected with the fourth sealing plate (29), and the fourth sealing plate (30) is fixedly connected with the fourth sealing plate (8) in sliding fit with the fourth sealing plate (30).
9. The floating collar shoes with multiple sealing functions for well cementation construction according to claim 8, further comprising a positioning and fixing mechanism for reducing fatigue of the first elastic piece (6), wherein the positioning and fixing mechanism is arranged on the first fixing plate (3), the positioning and fixing mechanism comprises a fixing shell (31), the fixing shell (31) is fixedly connected to the lower end of the first sliding rod (4), a sealing column (32) is connected in the fixing shell (31) in a sliding manner, the lower end of the third sliding rod (26) penetrates through the fixing shell (31) and is fixedly connected with the sealing column (32), symmetrically distributed guide plates (33) are fixedly connected to the lower side of the first fixing plate (3), sliding grooves are formed in the guide plates (33), symmetrical fixing blocks (34) are fixedly connected to the outer sides of the fixing shell (31), and the fixing blocks (34) are slidably connected with the sliding grooves of the adjacent guide plates (33), and positioning assemblies in limiting fit with the guide plates (33) are arranged on the fixing shell (31).
10. The floating collar floating shoe with multiple sealing functions for well cementation construction according to claim 9, characterized in that the positioning assembly comprises symmetrically distributed guide shells (35), the symmetrically distributed guide shells (35) are fixedly connected to the fixed shells (31), blind holes communicated with the adjacent guide shells (35) are formed in the fixed shells (31), a first sliding block (36) and a second sliding block (37) are connected in the guide shells (35) in a sliding mode, a fourth elastic piece (361) is fixedly connected between the first sliding block (36) and the fixed shells (31), a fifth elastic piece (38) is fixedly connected between the first sliding block (36) and the adjacent second sliding block (37), through holes are formed in the lower portion of the guide plates (33), the second sliding block (37) is in limit fit with the through holes of the adjacent guide plates (33), sliding grooves of the guide shells (35) are internally and slidably connected with connecting columns (39), the connecting columns (39) are fixedly connected with the adjacent first sliding blocks (36), the lower ends of the connecting columns (39) are fixedly connected with the second sliding blocks (40), and the lower ends of the connecting columns (39) are fixedly connected with the second sealing plates (40).
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| CN202310801520.1A CN116517500B (en) | 2023-07-03 | 2023-07-03 | Float collar float shoe with multiple sealing functions for well cementation construction |
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| CN202310801520.1A CN116517500B (en) | 2023-07-03 | 2023-07-03 | Float collar float shoe with multiple sealing functions for well cementation construction |
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| CN118423026A (en) * | 2024-07-02 | 2024-08-02 | 德州金玉石油机械科技有限公司 | Float collar for well cementation casing |
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