CN116717215A - Well cementation rubber plug for well cementation of oil field surface casing - Google Patents
Well cementation rubber plug for well cementation of oil field surface casing Download PDFInfo
- Publication number
- CN116717215A CN116717215A CN202311012694.6A CN202311012694A CN116717215A CN 116717215 A CN116717215 A CN 116717215A CN 202311012694 A CN202311012694 A CN 202311012694A CN 116717215 A CN116717215 A CN 116717215A
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- Prior art keywords
- plug
- annular
- shell
- well cementation
- block
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 71
- 239000005060 rubber Substances 0.000 title claims abstract description 71
- 238000007790 scraping Methods 0.000 claims description 23
- 238000009434 installation Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 229920003051 synthetic elastomer Polymers 0.000 claims description 7
- 239000005061 synthetic rubber Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- 238000005553 drilling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification 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
- E21B33/134—Bridging plugs
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of well cementation rubber plugs, and provides a well cementation rubber plug for oil field surface casing well cementation, which comprises a shell, wherein a rubber plug I is detachably arranged at the top of an inner cavity of the shell, square grooves are formed in the left side and the right side of the outer surface of the rubber plug I, a spring I is fixedly arranged in the inner cavity of the square groove, a limiting block is fixedly arranged on the other side of the spring I, and an annular block is fixedly arranged at the bottom of the rubber plug I; this a well cementation plug for well cementation of oil field top layer sleeve pipe uses through the cooperation of stopper structure and first structure of spring, during the use, makes plug two be connected with the annular plate of shell bottom through annular fixture block, makes plug one be connected with plug one utilizing annular piece and ring channel, after plug one installs the entering shell, utilizes stopper and spacing hole's position, after the stopper stretches into spacing hole inner chamber to this with plug one and shell fixed connection, reaches the effect that avoids drill bit rotational operation and plug adhesion.
Description
Technical Field
The invention relates to the technical field of cementing rubber plugs, in particular to a cementing rubber plug for oilfield surface casing cementing.
Background
In the drilling engineering, after drilling of a certain open hole is completed, a casing is required to be put down and well cementation is carried out. In the well cementation operation process, after cement slurry with a set amount is pumped in, a collision rubber plug is needed to be put in to replace cement slurry in the casing to enter the annulus. The collision-pressing rubber plug is formed by matching an upper rubber plug and a lower rubber plug, wherein the lower rubber plug is used for separating cement paste from a pre-liquid, and the upper rubber plug is used for separating cement paste from a displacement liquid. When the device is normally used, the lower rubber plug is firstly put into the sleeve to enable the lower rubber plug to descend to the float collar position at the bottom of the sleeve string, then cement paste with a set amount is pumped in, and then the upper rubber plug is put into the sleeve to replace until the upper rubber plug descends to the lower rubber plug, and the collision and pressing are completed.
Through retrieval, chinese patent publication No. CN115874980B discloses an anti-sleeve type well cementation rubber plug and an assembly method thereof, in the patent, through a split design, an outer layer rubber body cannot be integrally sleeved outside a drill bit, and can be only partially attached outside the drill bit at most, so that if a drilling string is found to be abnormal, only a plurality of lifting and lowering operations are needed, or the drill bit is lifted off a bottom hole and then rotates at a high speed, the partially attached rubber body can be separated from the drill bit with a high probability, the problem that the rubber plug is easy to sleeve the drill bit in the prior art is effectively solved, the tedious work that the rubber plug is required to be lifted up to clean and re-drill after the rubber plug is sleeved on the drill bit is avoided, the accident treatment time is obviously reduced, and the construction efficiency of drilling engineering is facilitated to be improved;
however, in the above patent, the colloid connected to the bottom of the drill bit can fall off after the drill bit is lifted off the bottom of the well or rotated at a high speed after the drill bit is lifted up and down for several times, but the problem that the colloid adheres to the drill bit still cannot be avoided.
Disclosure of Invention
The invention provides a well cementation rubber plug for well cementation of an oilfield surface casing, which has the advantages of avoiding sticking of a drill bit to the rubber plug during rotary operation, effectively removing impurities attached to the inner wall of the casing, rapidly and stably installing the rubber plug and improving the tightness during operation, and solves the problems that the drill bit may stick to the rubber plug during operation, the rubber plug cannot be effectively removed during the downward moving use process of the rubber plug, and the tightness is lower due to the fact that the installed rubber plug may rotate during use.
The technical scheme of the invention is as follows: the utility model provides a well cementation plug for well cementation of oil field surface casing, includes the shell, the inner chamber top demountable installation of shell has plug one, square groove has all been seted up to the left and right sides of plug one surface, the inner chamber fixed mounting of square groove has spring one, the opposite side fixed mounting of spring one has the stopper, the bottom fixed mounting of plug one has the annular piece, the bottom demountable installation of plug two, the ring channel has been seted up at the top of plug two, the bottom fixed mounting of shell has annular plate one, annular plate one's top fixed mounting has annular fixture block, spacing hole has all been seted up at the top of shell inner chamber left and right sides, the surface fixed mounting of shell has a plurality of annular outward edges, the surface fixed mounting of annular outward has a plurality of resistance pieces, the top fixed mounting of annular outward has the scraping strip, annular outward with fixed mounting has spring two between the shell outer wall.
Preferably, the bottom movable mounting of shell surface has annular plate two, annular plate two's top fixed mounting has a plurality of connecting blocks, the top fixed mounting of connecting block has the folding pole, the folding pole towards one side fixed mounting of shell has the spring three, the top fixed mounting of folding pole has the connecting rod, the folding pole is kept away from the top fixed mounting of shell one side has the picture peg.
Preferably, the limiting block is movably mounted in the inner cavity of the square groove through the first spring, the shape and the size of the outer surface of the limiting block are matched with those of the inner cavity of the limiting hole, and the position of the limiting hole is matched with that of the square groove, so that when the limiting block is used, the first rubber plug is inserted into the limiting hole after being mounted in the inner cavity of the shell, the first rubber plug is fixedly assembled with the shell through the limiting block, and the first rubber plug is prevented from being easily separated from the shell to rotate.
Preferably, the bottom of stopper is the inclined plane design, the top of stopper is the arc design to when using, utilize the inclined plane design of stopper bottom and the arc design at top, the stopper of being convenient for removes and inserts spacing downthehole chamber at the shell inner chamber fast.
Preferably, the shape and the size and the opening position of the annular block are matched with those of the annular groove, so that when the annular block is used, the first rubber plug is installed in the annular groove at the top of the second rubber plug through the annular block at the bottom, and the first rubber plug and the second rubber plug are connected.
Preferably, the shape of the first annular plate is larger than that of the bottom of the shell, and the bottom of the second rubber plug is provided with a groove which is matched with the shape, the size and the position of the annular clamping block, so that when the annular plate I is used, the contact area between the annular plate I and mud at the bottom of the shell during installation is increased, the shell is prevented from easily rotating and moving, and meanwhile the annular clamping block is used for enabling the second rubber plug to be connected with the first annular plate.
Preferably, the shape of the outermost edge of the scraping strip is designed as a chamfer, and the diameter of the outermost edge of the scraping strip is matched with the diameter of the scraping strip after the scraping strip and the resistance blocks are enclosed into a circle, so that when the casing moves downwards into the sleeve in use, the scraping strip and the resistance blocks contact the inner wall of the sleeve, and impurities on a downward moving path are hung up by the scraping strip along with the downward movement.
Preferably, the annular outer edge, the resistance block and the scraping strip are all made of synthetic rubber materials, and the resistance block is small in shape and large in friction coefficient, so that when the sleeve is used, the annular outer edge, the resistance block and the scraping strip are made of the synthetic rubber materials to have certain elasticity, and sleeve installation in a certain diameter range is met.
Preferably, the folding rod comprises three rotating shafts and two cross rods, the bottom of the folding rod is connected with the top of the connecting block through the rotating shafts, the top of the folding rod is connected with the connecting rod through the rotating shafts, and the second annular plate is connected with the outer surface of the bottom of the shell through the connecting block, the folding rod and the connecting rod.
Preferably, the pivot of folding lever top and bottom is located same vertical plane, the spring three sets up between top and bottom pivot, the picture peg top that is used for connecting between the upper and lower horizontal pole top sets up inserts the inner chamber of the annular outside of bottommost, so when using, annular board two receives external force when moving up, annular board two moves up through the bottom of connecting block drive folding lever, because connecting rod and the surface fixed mounting of shell, make the top position of folding lever unable to move up, so when folding lever bottom moved up, folding lever can only fold, and along with annular board two's upward movement, folding department on folding lever right side drives the picture peg to the direction removal of keeping away from the shell, drive the annular outside of bottommost to the direction removal of keeping away from the shell promptly, make the annular outside of bottommost closely laminate with the sleeve pipe inner wall, until the annular outside of bottommost extends to the furthest and closely laminates and fixed position with the sleeve pipe inner wall at this moment.
The working principle and the beneficial effects of the invention are as follows:
1. this a well cementation plug for well cementation of oil field top layer sleeve pipe uses through the cooperation of stopper structure and first structure of spring, during the use, makes plug two be connected with the annular plate of shell bottom through annular fixture block, makes plug one be connected with plug one utilizing annular piece and ring channel, after plug one installs the entering shell, utilizes stopper and spacing hole's position, after the stopper stretches into spacing hole inner chamber to this with plug one and shell fixed connection, reaches the effect that avoids drill bit rotational operation and plug adhesion.
2. This a well cementation plug for well cementation of oil field top layer sleeve pipe uses through the cooperation of annular outside structure and two structures of spring, during the use, utilize annular outside, resistance piece and scrape the material of strip and construct for the annular outside has certain elasticity, can satisfy the sleeve pipe installation of certain diameter scope, utilize simultaneously and scrape the strip outside edge shape and be the chamfer design, scrape the diameter assorted after strip outside edge diameter and all resistance pieces enclose into the round, when making the shell move down into the sleeve pipe, scrape strip and resistance piece contact sleeve pipe inner wall, with the move down, utilize to scrape the impurity on the strip will move down the route and hang down, reach the effect of effectively getting rid of sleeve pipe inner wall adhesion impurity.
3. This a well cementation plug for well cementation of oil field top layer sleeve pipe uses through the cooperation of folding rod structure and picture peg structure, during the use, because the top of folding rod passes through connecting rod fixed mounting at the shell outer wall, the middle part of folding rod inserts the inner chamber of bottommost annular outward through the picture peg, thereby when annular board two moves up, drive folding rod and move the shrink, with this middle part that drives the folding rod moves to the direction of keeping away from the shell, promote bottommost annular outward to the direction of keeping away from the shell promptly and remove, make bottommost annular outward closely laminate the sleeve pipe inner wall, fix simultaneously and avoid removing at the installation department, reach the effect of quick stable installation plug improvement during operation leakproofness.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic view of the front appearance of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention from the elevation view;
FIG. 3 is a schematic view of the front view of the entire structure of the present invention;
FIG. 4 is a schematic view of the overall structure of the present invention in a right front side view;
FIG. 5 is a schematic view of the structure of FIG. 3A according to the present invention;
fig. 6 is a schematic diagram of the structure of fig. 4 at B according to the present invention.
In the figure: 1. a housing; 2. a rubber plug I; 3. a square groove; 4. a first spring; 5. a limiting block; 6. an annular block; 7. a second rubber plug; 8. an annular groove; 9. an annular plate I; 10. an annular clamping block; 11. a limiting hole; 12. an annular outer edge; 13. a resistance block; 14. scraping the strip; 15. a second spring; 16. an annular plate II; 17. a connecting block; 18. a folding bar; 19. a third spring; 20. a connecting rod; 21. and (5) inserting plates.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 6, a cementing plug for cementing an oilfield surface casing comprises a shell 1, wherein a first plug 2 is detachably arranged at the top of an inner cavity of the shell 1, square grooves 3 are formed in the left side and the right side of the outer surface of the first plug 2, a first spring 4 is fixedly arranged in the inner cavity of the square grooves 3, a limit block 5 is fixedly arranged on the other side of the first spring 4, the bottom of the limit block 5 is in an inclined plane design, the top of the limit block 5 is in an arc design, when the cementing plug is used, the limit block 5 can be conveniently and rapidly moved in the inner cavity of the shell 1 and inserted into a limit hole 11 through the inclined plane design of the bottom of the limit block 5 and the arc design of the top, the limit block 5 is movably arranged in the inner cavity of the square grooves 3 through the first spring 4, the shape and the size of the outer surface of the limit block 5 are matched with the shape and the size of the inner cavity of the limit hole 11, the position of the limit hole 11 is matched with the position of the square groove 3, when in use, the first rubber plug 2 is inserted into the limiting hole 11 by the limiting block 5 after being installed into the inner cavity of the shell 1, thereby fixedly assembling the first rubber plug 2 and the shell 1, preventing the first rubber plug 2 and the shell 1 from being easily separated and rotated, the bottom of the first rubber plug 2 is fixedly provided with the annular block 6, the shape and the size and the opening position of the annular block 6 are matched with those of the annular groove 8, when in use, the first rubber plug 2 is installed in the annular groove 8 at the top of the second rubber plug 7 by the annular block 6 at the bottom, thereby connecting the first rubber plug 2 and the second rubber plug 7, the bottom of the first rubber plug 2 is detachably provided with the second rubber plug 7, the top of the second rubber plug 7 is provided with the annular groove 8, the bottom of the shell 1 is fixedly provided with the annular plate I9, the shape of the annular plate I9 is larger than the shape of the bottom of the shell 1, the bottom of the rubber plug II 7 is provided with a groove which is matched with the shape, the size and the position of the annular clamping block 10, so that when the rubber plug II is used, the annular plate 9 is utilized to increase the contact area between the shell 1 and mud at the bottom when the shell 1 is installed, the shell 1 is prevented from easily rotating and moving, meanwhile, the annular clamping block 10 is utilized to enable the rubber plug II 7 to be connected with the annular plate 9, the annular clamping block 10 is fixedly arranged at the top of the annular plate 9, the top of the left side and the right side of the inner cavity of the shell 1 are provided with limiting holes 11, the outer surface of the shell 1 is fixedly provided with a plurality of annular outer edges 12, the outer surface of the annular outer edges 12 is fixedly provided with a plurality of resistance blocks 13, the top of the annular outer edges 12 is fixedly provided with scraping strips 14, the shape of the outermost edges of the scraping strips 14 is in a chamfer design, and the diameter of the outermost edges of the scraping strips 14 is matched with the diameter of all the resistance blocks 13 after enclosing a circle, so that when the shell 1 moves downwards into a sleeve when in use, the scraping strip 14 and the resistance block 13 are contacted with the inner wall of the sleeve, along with the downward movement, the scraping strip 14 is utilized to hang impurities on a downward movement path, the annular outer edge 12, the resistance block 13 and the scraping strip 14 are all made of synthetic rubber materials, the shape of the resistance block 13 is smaller, and the friction coefficient of the material is larger, so that when the sleeve is used, the annular outer edge 12, the resistance block 13 and the scraping strip 14 are made of the synthetic rubber materials with certain elasticity, the sleeve is installed within a certain diameter range, a spring II 15 is fixedly installed between the annular outer edge 12 and the outer wall of the shell 1, an annular plate II 16 is movably installed at the bottom of the outer surface of the shell 1, a plurality of connecting blocks 17 are fixedly installed at the top of the annular plate II 16, a folding rod 18 is fixedly installed at the top of the connecting blocks 17, the folding rod 18 comprises three rotating shafts and two cross rods, the bottom of the folding rod 18 is connected with the top of the connecting blocks 17 through the rotating shafts, the top of folding pole 18 is connected with connecting rod 20 through the pivot, annular slab two 16 is connected with the bottom surface of shell 1 through connecting block 17, folding pole 18 and connecting rod 20, one side of folding pole 18 towards shell 1 fixed mounting has spring three 19, the top fixed mounting of folding pole 18 has connecting rod 20, the top fixed mounting of folding pole 18 one side of keeping away from shell 1 has picture peg 21, the pivot of folding pole 18 top and bottom is located same vertical plane, spring three 19 sets up between top and bottom pivot, the picture peg 21 top that is used for connecting between the upper and lower horizontal pole top sets up inserts the inner chamber of the annular outside 12 of bottommost, thereby during the use, annular slab two 16 receives external force when moving up, annular slab two 16 upwards move through connecting block 17 drive the bottom of folding pole 18, because connecting rod 20 and the surface fixed mounting of shell 1, make the top position of folding pole 18 unable upward movement, when folding pole 18 bottom upward moves, and along with the upward movement of annular slab two 16, the fold department drive picture peg 21 to the direction of keeping away from shell 1, namely drive the annular outside 12 to move to the annular outside 12 of bottommost, the annular outside is in the annular outside 12 and the annular outside is the furthest laminating to the annular outside 12 and the annular outside is the furthest is moved to the annular outside 12 of the bottom of the top.
Working principle: during operation, firstly, the rubber plug II 7 is inserted into the inner cavity of the shell 1, the annular clamping block 10 arranged at the top of the annular plate 9 fixedly installed at the bottom of the shell 1 is utilized to enable the rubber plug II 7 to be assembled with the shell 1, then the rubber plug I2 is assembled with the rubber plug II 7 through the annular block 6 fixedly installed at the bottom of the rubber plug I2 and the annular groove 8 arranged at the top of the rubber plug II 7, the position of the square groove 3 formed on the outer surface of the assembled rubber plug I2 is matched with the position of the limit hole 11 formed on the inner wall of the shell 1, the inclined surface design at the bottom of the limit block 5, the arc-shaped design at the top of the limit block 5 and the limit block 5 are movably installed in the inner cavity of the square groove 3 through the spring I4, after the rubber plug I2 is inserted into the inner cavity of the shell 1, the limit block 5 is quickly moved in the inner cavity of the shell 1 under the elastic force of the spring I4, and the limit hole 11, the limit block 5 and the annular clamping block 10 are utilized to enable the rubber plug I2 and the rubber plug II 7 to be quickly installed in the inner cavity of the shell 1 and cannot rotate after being installed, so that the bit is prevented from adhering to each other during rotary operation, and working efficiency is prevented;
then the assembled shell 1 is inserted into a sleeve cavity and is moved downwards to a bottom installation position in the sleeve cavity, in the process of moving downwards the shell 1, the diameter of the outermost edge of the scraping strip 14 is matched with the diameter of the ring formed by surrounding all the resistance blocks 13, the annular outer edge 12, the resistance blocks 13 and the scraping strip 14 are all made of synthetic rubber materials, the shape of the resistance blocks 13 is small, the friction coefficient of the materials is large, when the shell 1 moves downwards into the sleeve in use, the scraping strip 14 and the resistance blocks 13 contact the inner wall of the sleeve, along with the downward movement, impurities on a downward movement path are hung by the scraping strip 14, and the synthetic rubber materials of the annular outer edge 12, the resistance blocks 13, the scraping strip 14 and the springs II 15 are matched, so that after the shell 1 moves downwards to the installation position, the shell 1 is difficult to move upwards, and the impurities attached to the inner wall of the sleeve are automatically removed when the shell 1 moves downwards;
the device is installed and used, along with the addition of cement paste, the annular plate II 16 movably installed at the bottom of the outer surface of the shell 1 gradually moves upwards along with the addition of the cement paste, the bottom of the folding rod 18 is driven to move upwards through the connecting block 17 when the annular plate II 16 moves upwards, because the connecting rod 20 is fixedly installed with the outer surface of the shell 1, the top position of the folding rod 18 cannot move upwards, so when the bottom of the folding rod 18 moves upwards, the folding rod 18 can only be folded, along with the upward movement of the annular plate II 16, the folding part on the right side of the folding rod 18 drives the inserting plate 21 to move in a direction away from the shell 1, namely, the bottommost annular outer edge 12 is driven to move in a direction away from the shell 1, so that the bottommost annular outer edge 12 is tightly attached to the inner wall of the sleeve until the bottommost annular outer edge 12 cannot move, and at the bottommost annular outer edge 12 extends to the maximum extent and is tightly attached to the inner wall of the sleeve and is fixed in the position, so that the installation position of the shell 1 is tightly attached to the bottommost annular outer edge 12 after extension.
In conclusion, compared with the common similar device, the device has the advantages of avoiding the adhesion between the drill bit and the rubber plug during rotary operation, effectively removing impurities attached to the inner wall of the sleeve, and rapidly and stably installing the rubber plug to improve the tightness during operation.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The utility model provides a well cementation plug for well cementation of oil field surface casing, its characterized in that, including shell (1), demountable installation has plug one (2) at the inner chamber top of shell (1), square groove (3) have all been seted up to the left and right sides of plug one (2) surface, the inner chamber fixed mounting of square groove (3) has spring one (4), opposite side fixed mounting of spring one (4) has stopper (5), the bottom fixed mounting of plug one (2) has annular piece (6), demountable installation has plug two (7) in the bottom of plug one (2), annular groove (8) have been seted up at the top of plug two (7), annular clamping block (10) have been seted up at the bottom fixed mounting of shell (1), spacing hole (11) have all been seted up at the top of annular plate one (9) the top of shell (1) inner chamber left and right sides, the surface fixed mounting of shell (1) has a plurality of annular outside (12), the surface fixed mounting of annular outside (12) has a plurality of resistance pieces (13), annular outside (12) have between annular outside (12) and the fixed mounting of shell (14).
2. The cementing plug for oilfield surface casing cementing according to claim 1, wherein an annular plate II (16) is movably mounted at the bottom of the outer surface of the casing (1), a plurality of connecting blocks (17) are fixedly mounted at the top of the annular plate II (16), a folding rod (18) is fixedly mounted at the top of the connecting blocks (17), a spring III (19) is fixedly mounted at one side of the folding rod (18) facing the casing (1), a connecting rod (20) is fixedly mounted at the top of the folding rod (18), and a plugboard (21) is fixedly mounted at the top of one side of the folding rod (18) away from the casing (1).
3. The well cementation rubber plug for oilfield surface casing well cementation according to claim 1, wherein the limiting block (5) is movably installed in the inner cavity of the square groove (3) through the first spring (4), the shape and the size of the outer surface of the limiting block (5) are matched with those of the inner cavity of the limiting hole (11), and the position of the limiting hole (11) is matched with that of the square groove (3).
4. The cementing plug for oilfield surface casing cementing according to claim 1, wherein the bottom of the limiting block (5) is of an inclined plane design, and the top of the limiting block (5) is of an arc-shaped design.
5. A cementing plug for oilfield surface casing cementing according to claim 1 wherein the annular block (6) is of a shape and size and set-up position that match the shape and size and set-up position of the annular groove (8).
6. The cementing plug for oilfield surface casing cementing according to claim 1, wherein the shape of the annular plate I (9) is larger than the shape of the bottom of the shell (1), and a groove matched with the shape, the size and the position of the annular clamping block (10) is formed in the bottom of the plug II (7).
7. A cementing plug for oilfield surface casing cementing according to claim 1 wherein the outermost edge of the wiper strip (14) is shaped as a chamfer, and the diameter of the outermost edge of the wiper strip (14) matches the diameter of all the resistance blocks (13) after being surrounded by a circle.
8. A cementing plug for oilfield surface casing cementing according to claim 1 wherein the annular outer rim (12), the resistance block (13) and the scraping strip (14) are all constructed of synthetic rubber material, the shape of the resistance block (13) being smaller and the coefficient of friction of the material being larger.
9. A cementing plug for oilfield surface casing cementing according to claim 2 wherein the folding bar (18) comprises three rotating shafts and two cross bars, the bottom of the folding bar (18) is connected with the top of the connecting block (17) through the rotating shafts, the top of the folding bar (18) is connected with the connecting rod (20) through the rotating shafts, and the annular plate two (16) is connected with the bottom outer surface of the housing (1) through the connecting block (17), the folding bar (18) and the connecting rod (20).
10. A cementing plug for oilfield surface casing cementing according to claim 2 wherein the axes of rotation of the top and bottom of the folding rod (18) are in the same vertical plane, the spring three (19) is disposed between the top and bottom axes of rotation, and the top of the insert plate (21) disposed at the top of the axis of rotation for connection between the upper and lower cross bars is inserted into the cavity of the bottommost annular outer edge (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311012694.6A CN116717215B (en) | 2023-08-12 | 2023-08-12 | Well cementation rubber plug for well cementation of oil field surface casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311012694.6A CN116717215B (en) | 2023-08-12 | 2023-08-12 | Well cementation rubber plug for well cementation of oil field surface casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116717215A true CN116717215A (en) | 2023-09-08 |
| CN116717215B CN116717215B (en) | 2023-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311012694.6A Active CN116717215B (en) | 2023-08-12 | 2023-08-12 | Well cementation rubber plug for well cementation of oil field surface casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116717215B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117005827A (en) * | 2023-09-26 | 2023-11-07 | 河北漫浩科技有限责任公司 | Cementing rubber plug capable of preventing cement paste from flowing upwards and flowing backwards |
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| WO2001009480A1 (en) * | 1999-08-03 | 2001-02-08 | Latiolais, Burney, J., Jr. | Anti-rotation device for use with well tools |
| CN106988688A (en) * | 2017-06-08 | 2017-07-28 | 广汉川亿石油科技有限公司 | Well cementation eddy flow rigid, hard centralizer |
| CN214836254U (en) * | 2021-06-21 | 2021-11-23 | 孙鲁星 | Anti-rotation device for petroleum well cementing rubber plug |
| CN215595541U (en) * | 2021-09-01 | 2022-01-21 | 常熟市石油固井工具有限公司 | Self-locking composite upper rubber plug for well cementation |
| CN217582087U (en) * | 2022-07-28 | 2022-10-14 | 周波 | Well cementation lower rubber plug for well cementation of surface casing of oil field |
| CN115874980A (en) * | 2023-03-08 | 2023-03-31 | 西南石油大学 | Sleeve-proof well cementation rubber plug and assembly method thereof |
| CN218844273U (en) * | 2022-12-26 | 2023-04-11 | 青岛鑫源晟石油科技有限公司 | Rubber plug for petroleum drilling surface well cementation |
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2023
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117005827A (en) * | 2023-09-26 | 2023-11-07 | 河北漫浩科技有限责任公司 | Cementing rubber plug capable of preventing cement paste from flowing upwards and flowing backwards |
| CN117005827B (en) * | 2023-09-26 | 2023-12-19 | 河北漫浩科技有限责任公司 | Cementing rubber plug capable of preventing cement paste from flowing upwards and flowing backwards |
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| Publication number | Publication date |
|---|---|
| CN116717215B (en) | 2023-10-24 |
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