CN113818826A - Tail pipe suspension well cementation device - Google Patents
Tail pipe suspension well cementation device Download PDFInfo
- Publication number
- CN113818826A CN113818826A CN202111187410.8A CN202111187410A CN113818826A CN 113818826 A CN113818826 A CN 113818826A CN 202111187410 A CN202111187410 A CN 202111187410A CN 113818826 A CN113818826 A CN 113818826A
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- cylinder body
- joint
- sleeve
- drillable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for anchoring the tools or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention relates to a tail pipe suspension well cementation device which comprises a lifting joint, wherein the lower end of the lifting joint is screwed with a lifting pipe, a hanger is screwed below the lifting pipe, the lower end of the hanger is connected with a conversion joint, the lower end of the conversion joint is screwed with a tail pipe, a large rubber plug is arranged in an inner cavity of the top of the tail pipe, an upper port of a central hole of the large rubber plug is screwed at the lower part of a drillable joint, the upper end of the central hole of the drillable joint is provided with a horn mouth, the middle section of the central hole of the drillable joint is provided with a small rubber plug locking groove, the periphery of the upper part of the drillable joint is uniformly provided with centering blocks, each centering block is respectively connected with the drillable joint through a shear pin of the drillable joint, and the outer edge of the bottom of each centering block is respectively placed on the upper port of the tail pipe. The hanger is provided with an upper hydraulic cylinder body, a lower hydraulic cylinder body, an upper slip and a lower slip. The device can ensure that the tail pipe can be reliably hung in the original well casing, the ash injection and the slurry replacement can be successfully completed after the tail pipe is hung successfully, and the inner drift diameter of the device is large after the slurry replacement is completed.
Description
Technical Field
The invention relates to a tail pipe suspension well cementation device, and belongs to the technical field of tail pipe suspension tools.
Background
In the later stage of oil field production, the original well cannot be exploited due to factors such as casing damage, and exploitation of an encrypted well or a renewed well can greatly increase the oil extraction cost. A small casing (also called tail pipe) is arranged in the original well casing, or a new hole is drilled on the side of a window in the original well casing, and then the small casing is arranged, so that the original ground facilities can be utilized, the construction cost is reduced, and the stable and the high yield of the oil field is ensured.
After the tail pipe is lowered to a preset depth in the original well casing or the new well hole, the upper end of the tail pipe is hung in the original well casing through a tail pipe hanger, and the tail pipe enters a cement injection well cementation mode after being hung successfully. Before the liner is put down, the well section of the original well casing for the liner hanger to be seated and hung must be detected and confirmed to be intact so as to bear the huge anchoring force of the liner hanger. In actual construction, sometimes the detected suspension well section is kept in a good shape and is mistakenly hung, but actually the suspension well section is corroded, the huge anchoring force of the slip sheet cannot be borne during hanging, the hanging failure is caused, and the cost of about two to three ten thousand yuan is increased when the drill bit is re-tripped.
In practice, the slips cannot be hung in a sitting mode in some well construction, and a ground discovery tool is put forward to discover all the well is normal; after the tool goes into the well again, the slips still cannot be hung by sitting and can not be found out again, and the problem that the pressure of the hydraulic cavity cannot be built due to the underground pressure state is analyzed and must be solved.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a tail pipe suspension well cementation device which can ensure that a tail pipe can be reliably seated and hung in an original well casing pipe, can smoothly complete ash injection and slurry replacement after the seating and hanging are successful, and has a large inner drift diameter after the slurry replacement is completed.
In order to solve the technical problems, the tail pipe suspension well cementation device comprises a lifting joint, wherein the lower end of the lifting joint is screwed with a lifting pipe, a hanger is screwed below the lifting pipe, the lower end of the hanger is connected with a conversion joint, the lower end of the conversion joint is screwed with a tail pipe, a large rubber plug is arranged in an inner cavity of the top of the tail pipe, an upper port of a central hole of the large rubber plug is screwed at the lower part of a drillable joint, a horn mouth is arranged at the upper end of the central hole of the drillable joint, a small rubber plug locking groove is arranged in the middle section of the central hole of the drillable joint, centering blocks are uniformly arranged on the periphery of the upper part of the drillable joint, all the centering blocks are connected with the drillable joint through drillable joint shear pins respectively, and the outer edges of the bottoms of all the centering blocks are placed on the upper port of the tail pipe respectively.
As an improvement of the invention, the hanger comprises an inverted upper joint which is screwed below the lifting pipe, and the lower end of the inverted upper joint is screwed with a downward extending central pipe through an inverted lower joint; the periphery of the upper reverse buckle joint is provided with a sealing box shell, an inverted buckle nut is sleeved on the external spline of the middle section of the upper reverse buckle joint, and the periphery of the inverted buckle nut is connected with the middle section of the sealing box shell in a rotating mode.
As a further improvement of the invention, a sealing box body is arranged between the outer wall of the central tube and the inner wall of the sealing box shell, the lower end of the sealing box shell is screwed with an upper hydraulic cylinder body, the upper part of the upper hydraulic cylinder body is fixed with an upper taper sleeve, the lower end of the upper taper sleeve is inserted into an inner taper hole of each upper slip sheet, the lower end of each upper slip sheet is fixed at the upper part of an upper hydraulic cylinder sleeve, the upper hydraulic cylinder sleeve is sleeved on the periphery of the upper hydraulic cylinder body, the lower part of the upper hydraulic cylinder sleeve is fixed on the upper hydraulic cylinder body through an upper hydraulic cylinder sleeve shear pin, an upper hydraulic cavity is arranged between the middle inner wall of the upper hydraulic cylinder sleeve and the outer wall of the upper hydraulic cylinder body, and the upper hydraulic cylinder body is provided with an overflowing hole communicated with the upper hydraulic cavity.
As a further improvement of the invention, a flat bearing is arranged below an upper outer step of the upper reversing connector, the bottom of the flat bearing is supported on an upper inner step of the sealing box shell through a small shaft sleeve, a spring is arranged below the small shaft sleeve, and the lower part of the spring is supported on the top of the reversing nut.
As a further improvement of the invention, the upper end of the sealing box shell is provided with a large shaft sleeve, the large shaft sleeve is fixed on the periphery of the upper end of the upper reversing connector through a screw, and an overflowing channel is arranged between a conical head at the lower end of the large shaft sleeve and an upper port of the sealing box shell.
As a further improvement of the invention, the lower end of the upper hydraulic cylinder body is connected with a lower hydraulic cylinder body through an upper coupling, the upper part of the lower hydraulic cylinder body is fixed with a lower taper sleeve, the lower end of the lower taper sleeve is inserted into an inner taper hole of each lower slip sheet, the lower end of each lower slip sheet is fixed at the lower part of a lower hydraulic cylinder sleeve, the lower hydraulic cylinder sleeve is sleeved at the periphery of the lower hydraulic cylinder body, and the lower part of the lower hydraulic cylinder sleeve is fixed on the lower hydraulic cylinder body through a lower hydraulic cylinder sleeve shear pin; and a lower hydraulic cavity is arranged between the inner wall of the middle part of the lower hydraulic cylinder sleeve and the outer wall of the lower hydraulic cylinder body, and an overflowing hole is formed in the lower hydraulic cylinder body and communicated with the lower hydraulic cavity.
As a further improvement of the invention, the upper cylinder body upper retainer ring is embedded on the periphery of the middle section of the upper cylinder body, and the lower cylinder body upper retainer ring is embedded on the periphery of the middle section of the lower cylinder body; the top of the upper taper sleeve is abutted against the lower part of the sealing box shell, and the top of the lower taper sleeve is abutted against the lower part of the upper coupling.
As a further improvement of the invention, the top of the sealed box body is abutted against the lower part of the upper step of the central tube, and the lower end of the sealed box body is uniformly provided with a plurality of elastic clamping jaws; the lower end of the upper hydraulic cylinder body is connected with a tail pipe connecting short joint through a lower coupling; the lower end of the central tube extends to the inner cavity of the tail tube connecting nipple and is screwed with a central tube threaded sleeve, and a central tube caulking groove for embedding each elastic clamping jaw is formed in the upper portion of the central tube threaded sleeve.
As a further improvement of the invention, a plurality of forced liquid inlet holes are uniformly distributed on the circumference of the central tube caulking groove.
As a further improvement of the invention, the bottom of the upper hydraulic cylinder sleeve abuts against a lower retaining ring of an upper hydraulic cylinder body, the lower retaining ring of the upper hydraulic cylinder body is embedded in the outer wall of the lower part of the upper hydraulic cylinder body, and an upper centering sleeve is sleeved below the lower step of the upper hydraulic cylinder body; the bottom of the lower hydraulic cylinder sleeve abuts against a lower retaining ring of the lower hydraulic cylinder body, the lower retaining ring of the lower hydraulic cylinder body is embedded in the outer wall of the lower part of the lower hydraulic cylinder body, and a lower centering sleeve is sleeved below the lower step of the lower hydraulic cylinder body.
Compared with the prior art, the invention has the following beneficial effects: 1. the upper part of the hanger sealing box body seals an annular space between the sealing box shell and the central pipe, after a well mouth is pressurized, pressure liquid enters an upper hydraulic cavity and a lower hydraulic cavity, the pressure of the upper hydraulic cavity pushes an upper hydraulic cylinder sleeve to move upwards, the upper hydraulic cylinder sleeve drives upper slip sheets to move upwards, and the upper ends of the upper slip sheets are expanded and anchored on the inner wall of an original well casing; and in the same way, the lower slip sheet anchors the inner wall of the next section.
2. Even if the false integrity of a certain section of casing pipe occurs, the possibility of detecting well section corrosion is low, the successful suspension can be ensured, and the re-trip is avoided.
3. After the suspension is successful, the feeding tool connected with the central pipe is inverted through the inverted nut, then the wellhead is lifted, the tool is guaranteed to have a large enough inner diameter, and subsequent tools can go into the well smoothly.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.
FIG. 1 is a sectional view of the upper part of a liner suspension cementing apparatus of the present invention.
FIG. 2 is a sectional view of the middle upper portion of a liner of the liner suspension cementing apparatus of the present invention.
FIG. 3 is a cross-sectional view of the middle part of the liner suspension cementing device of the present invention.
FIG. 4 is a sectional view of the lower middle part of the liner suspension cementing apparatus of the present invention.
FIG. 5 is a sectional view of the lower part of the liner suspension cementing apparatus of the present invention.
In the figure: 1. lifting the joint; 2. lifting the tube; 3. a large shaft sleeve; 4. reversely buckling an upper joint; 5. a flat bearing; 6. a small shaft sleeve; 7. a spring; 8. a sealed box housing; 9. a back-off nut; 10. the lower joint is reversely buckled; 11. a central tube; 11a, central tube caulking groove; 11b, forcing a liquid inlet hole; 12. sealing the box body; 12a, elastic jaws; 13. the outer sealing ring of the sealing box body; 14. a sealing ring is arranged in the sealing box body; 15. a liquid feeding cylinder body; 16. mounting a taper sleeve; 17. mounting a card tile; 18. the upper check ring of the upper hydraulic cylinder body; 19. feeding a liquid cylinder sleeve; 20. an upper hydraulic cylinder sleeve inner seal ring; 21. an outer sealing ring of the upper cylinder body; 22. feeding a hydraulic cylinder sleeve shear pin; 23. a lower retainer ring of the upper cylinder body; 24. a centralizing sleeve is arranged; 25. mounting a coupling; 26. a lower liquid cylinder body; 27. a lower taper sleeve; 28. a card-placing tile; 29. an upper check ring of the lower hydraulic cylinder body; 30. a lower liquid cylinder sleeve; 31. a lower cylinder sleeve inner sealing ring; 32. the outer sealing ring of the lower liquid cylinder body; 33. a lower hydraulic cylinder sleeve shear pin; 34. a lower check ring of the lower liquid cylinder body; 35. a lower righting sleeve; 36. a lower coupling; 37. the tail pipe is connected with the short joint; 38. a central pipe thread sleeve; 39. a crossover sub; 40. a tail pipe; 41. a righting block; 42. a joint shear pin can be drilled; 43. a drillable joint; 43a, a small rubber plug lock groove; 44. a large rubber plug.
Detailed Description
As shown in fig. 1 to 5, the liner hanging and cementing device of the present invention includes a pulling joint 1, a pulling pipe 2 is screwed to the lower end of the pulling joint 1, and a hanger is screwed to the lower side of the pulling pipe 2. The hanger comprises an upper reverse-buckling joint 4, a sealing box shell 8, a reverse-buckling nut 9, a lower reverse-buckling joint 10, a central pipe 11, a sealing box body 12, an upper hydraulic cylinder body 15 and a lower hydraulic cylinder body 26.
The lower end male thread of the lifting pipe 2 is connected with the upper end female thread of the back-off upper joint 4 in a screwing mode, a flat bearing 5 is arranged below an outer step on the upper portion of the back-off upper joint 4, the bottom of the flat bearing 5 is supported on an inner step on the upper portion of the sealing box shell 8 through a small shaft sleeve 6, a spring 7 is arranged below the small shaft sleeve 6, and the top of a back-off nut 9 is pressed below the spring 7.
The lower end of the upper back-off connector 4 is screwed with a central tube 11 extending downwards through a lower back-off connector 10; the periphery of the upper back-off joint 4 is provided with a sealing box shell 8, the outer spline of the middle section of the upper back-off joint 4 is sleeved with a back-off nut 9, and the periphery of the back-off nut 9 is connected with the middle section of the sealing box shell 8 through rectangular reversed threads in a screwed mode.
Since the inverse thread of the seal box housing 8 is located in the deep cavity, it is difficult to assemble with the back-off nut 9. This instrument is when the assembly, put into the inner chamber of seal box shell 8 earlier back-off nut 9, the internal spline of back-off nut 9 slides downwards along the external spline in 4 middle sections on the back-off, then put into spring 7, spring 7 falls on back-off nut 9 top, put into little axle sleeve 6 again, little axle sleeve 6 presses on spring 7 upper portion, put into plain bearing 5 again, the outer step in upper portion of back-off top connection 4 presses in plain bearing 5 top, when the bottom seat of little axle sleeve 6 is on the upper portion inner step of seal box shell 8, spring 7 exerts decurrent power for back-off nut 9 promptly, when back-off top connection 4 drives back-off nut 9 through the spline and reverses, back-off nut 9 can connect with seal box shell 8 soon smoothly, after the back-on-place, the lower extreme of back-off nut 9 supports and leans on the top of back-off bottom connection 10.
A sealing box body 12 is arranged between the outer wall of the central tube 11 and the inner wall of the sealing box shell 8, the lower end of the sealing box shell 8 is screwed with an upper liquid cylinder body 15, an upper taper sleeve 16 is fixed on the upper part of the upper liquid cylinder body 15, and the top of the upper taper sleeve 16 is abutted against the lower part of the sealing box shell 8. The lower end of the upper taper sleeve 16 is inserted into the inner taper hole of each upper slip sheet 17, the lower end of each upper slip sheet 17 is fixed on the upper part of the upper hydraulic cylinder sleeve 19, the upper hydraulic cylinder sleeve 19 is sleeved on the periphery of the upper hydraulic cylinder body 15, and the lower part of the upper hydraulic cylinder sleeve 19 is fixed on the upper hydraulic cylinder body 15 through an upper hydraulic cylinder sleeve shear pin 22. An upper hydraulic cavity is arranged between the inner wall of the middle part of the upper hydraulic cylinder sleeve 19 and the outer wall of the upper hydraulic cylinder body 15, and an overflowing hole which is communicated with the upper hydraulic cavity is arranged on the upper hydraulic cylinder body 15.
The lower end of the upper hydraulic cylinder body 15 is connected with a lower hydraulic cylinder body 26 through an upper coupling 25, an upper centering sleeve 24 is arranged above the upper coupling 25, and the upper centering sleeve 24 is positioned below the lower step of the upper hydraulic cylinder body 15.
The lower cylinder 26 has a lower sleeve 27 fixed to its upper portion, and the lower sleeve 27 abuts against the lower portion of the upper collar 25 at its top. The lower end of the lower taper sleeve 27 is inserted into the inner taper hole of each lower slip sheet 28, the lower end of each lower slip sheet 28 is fixed at the lower part of the lower hydraulic cylinder sleeve 30, the lower hydraulic cylinder sleeve 30 is sleeved on the periphery of the lower hydraulic cylinder body 26, and the lower part of the lower hydraulic cylinder sleeve 30 is fixed on the lower hydraulic cylinder body 26 through a lower hydraulic cylinder sleeve shear pin 33. A lower hydraulic cavity is arranged between the inner wall of the middle part of the lower hydraulic cylinder sleeve 30 and the outer wall of the lower hydraulic cylinder body 26, and an overflowing hole which is communicated with the lower hydraulic cavity is arranged on the lower hydraulic cylinder body 26.
The upper outer wall of the sealing box body 12 is sealed with the sealing box shell 8 through an outer sealing ring 13 of the sealing box body, the upper inner wall of the sealing box body 12 is sealed with the central pipe 11 through an inner sealing ring 14 of the sealing box body, after a wellhead is suppressed, pressure liquid enters an upper hydraulic cavity and a lower hydraulic cavity, and an upper inner wall of an upper hydraulic cylinder sleeve 19 is provided with an inner sealing ring 20 of the upper hydraulic cylinder sleeve to seal the upper part of the upper hydraulic cavity; an upper cylinder outer sealing ring 21 is arranged below the overflowing hole of the upper cylinder 15 to seal the lower part of the upper hydraulic cavity. The inner wall of the upper part of the lower hydraulic cylinder sleeve 30 is provided with a lower hydraulic cylinder sleeve inner sealing ring 31 for sealing the upper part of the lower hydraulic cavity; a lower cylinder outer sealing ring 32 is arranged below the overflowing hole of the lower cylinder 26 to seal the lower part of the lower hydraulic cavity.
The pressure of the upper hydraulic cavity shears an upper hydraulic cylinder sleeve shear pin 22 at the lower part of the upper hydraulic cylinder sleeve 19 to push the upper hydraulic cylinder sleeve 19 to go upwards, the upper hydraulic cylinder sleeve 19 drives the upper slip sheets 17 to go upwards, and the upper ends of the upper slip sheets 17 are stretched and anchored on the inner wall of the original well casing.
The pressure of the lower hydraulic cavity shears a lower hydraulic cylinder sleeve shear pin 33 at the lower part of the lower hydraulic cylinder sleeve 30, the lower hydraulic cylinder sleeve 30 is pushed to move upwards, the lower hydraulic cylinder sleeve 30 drives the lower clamping tiles 28 to move upwards, and the upper ends of the lower clamping tiles 28 are opened and also anchored on the inner wall of the original well casing. The successful setting and hanging of the tail pipe 40 can be realized by one of the upper slip sheet 17 or the lower slip sheet 28 as long as the anchoring is reliable. After the sitting and hanging, the lifting pipe 2 is pressed down to confirm the successful sitting and hanging.
The bottom of the upper hydraulic cylinder sleeve 19 is abutted against the lower retainer ring 23 of the upper hydraulic cylinder body, and the lower retainer ring 23 of the upper hydraulic cylinder body is embedded in the outer wall of the lower part of the upper hydraulic cylinder body 15 to provide support for the upper hydraulic cylinder sleeve 19. The bottom of the lower hydraulic cylinder sleeve 30 abuts against the lower check ring 34 of the lower hydraulic cylinder body, and the lower check ring 34 of the lower hydraulic cylinder body is embedded in the outer wall of the lower part of the lower hydraulic cylinder body 26 to support the lower hydraulic cylinder sleeve 30.
An upper cylinder body upper retainer ring 18 is embedded on the periphery of the middle section of the upper cylinder body 15 to limit the upward limit position of an upper cylinder sleeve 19. The lower cylinder body upper retainer ring 29 is embedded on the periphery of the middle section of the lower cylinder body 26 to limit the upward limit position of the lower cylinder sleeve 30.
The upper end of seal box shell 8 is equipped with big axle sleeve 3, and big axle sleeve 3 passes through the fix with screw in the upper end periphery of back-off top connection 4, can play the effect of rightting, also avoids impurity to fall into the inner chamber of seal box shell 8. Be equipped with the passageway that overflows between the conical head of 3 lower extremes in big axle sleeve and the last port of seal box shell 8, when the back-off nut 9 of being convenient for was opened upside down, the liquid of 8 inner chambers of seal box shell flowed out, avoided suppressing the pressure.
The top of the sealed box body 12 is abutted against the lower part of the upper step of the central tube 11, and the lower end of the sealed box body 12 is uniformly provided with a plurality of elastic clamping claws 12 a; the lower end of the upper hydraulic cylinder body 15 is connected with a tail pipe connecting nipple 37 through a lower coupling 36, a lower centering sleeve 35 is arranged above the lower coupling 36, and the lower centering sleeve 35 is positioned below the lower step of the lower hydraulic cylinder body 26.
The lower end of the central tube 11 extends to the inner cavity of the tail tube connecting nipple 37 and is screwed with a central tube threaded sleeve 38, and a central tube embedding groove 11a for embedding each elastic clamping jaw 12a is formed above the central tube threaded sleeve 38.
The lower end of the tail pipe connecting short section is connected with a conversion joint 39, the lower end of the conversion joint 39 is screwed with a tail pipe 40, the top inner cavity of the tail pipe 40 is provided with a large rubber plug 44, the upper end opening of the central hole of the large rubber plug is screwed with the lower part of a drillable joint 43, and the upper end of the central hole of the drillable joint is provided with a bell mouth for facilitating the insertion of a small rubber plug; the middle section of the center hole of the drillable joint is provided with a small rubber plug locking groove 43a, so that the small rubber plug can be conveniently pressed and locked.
Four centralizing blocks 41 are uniformly arranged on the periphery of the upper part of the drillable joint 43, each centralizing block 41 is respectively connected with the drillable joint 43 through a drillable joint shear pin 42, and the outer edge of the bottom of each centralizing block 41 is respectively placed on the upper port of the tail pipe 40. The four centralizing blocks 41 not only suspend the drillable sub 43 and the large plug 44 above the liner 40, but also center the large plug 44 with the base pipe to facilitate the small plug impact.
The top of the drillable sub 43 is confined to the tight space between the tailpipe upper port and the base pipe lower port, waiting for a small plug. The spacing between the lower end of the base pipe and the drillable joint 43 allows fluid flow into the annulus around the base pipe and provides pressurized fluid to the upper hydraulic chamber of the upper hydraulic liner 19 and the lower hydraulic chamber of the lower hydraulic liner 30. When backpressure is generated underground, the large rubber plug 44 and the drillable joint 43 float upwards, and the upper end of the drillable joint 43 is possibly attached to the lower end of the central pipe, so that the flow channel between the inner cavity of the central pipe and the periphery is blocked, and the hanger cannot be hung. According to the invention, the plurality of forced liquid inlet holes 11b are uniformly distributed on the circumference of the central tube caulking groove 11a, and even if the lower port of the central tube is blocked by the drillable joint 43, pressure liquid in the inner cavity of the central tube can enter the annular space on the periphery of the central tube through each forced liquid inlet hole 11b, so that the upper liquid cylinder sleeve 19 and the lower liquid cylinder sleeve 30 can accurately act.
After the hanger is hung successfully, cement is injected, a small rubber plug is thrown into, the small rubber plug moves downwards along a center hole of a drill rod, drilling fluid is pushed into an annulus outside a tail pipe 40, the small rubber plug is downwards inserted into a center hole of the drillable joint from a lower port of a center pipe, an elastic lock ring at the periphery of the small rubber plug is embedded into a small rubber plug lock groove 43a in the middle section of the center hole of the drillable joint and is locked, the small rubber plug is combined with a large rubber plug 44, a center hole of the drillable joint 43 is sealed by a seal ring of the small rubber plug, and small collision pressure is completed. Then the wellhead continues pressurizing, the shear pin 42 of the drillable joint is sheared off, and the small rubber plug and the large rubber plug 44 descend together to replace slurry.
After slurry is replaced, the drill rod is rotated forwards, the external spline in the middle section of the upper back-off connector 4 drives the back-off nut 9 to rotate, the back-off nut 9 is disengaged from the sealing box shell 8, the spring 7 is compressed in the back-off process, and the back-off nut 9 slides along the external spline in the middle section of the upper back-off connector 4.
The large shaft sleeve 3, the upside-down upper joint 4, the upside-down lower joint 10 and the central pipe 11 are upwards drawn out by lifting the pulling joint 1, when the elastic clamping jaw 12a at the lower end of the sealing box body 12 reaches the lower part of the central pipe 11, the elastic clamping jaw is embedded into the central pipe caulking groove 11a and is hung by the central pipe thread sleeve 38, the sealing box body 12 is lifted out of a well mouth under the lifting of the central pipe 11, no retentate in the inner cavity of the sealing box shell 8 is ensured, the tool is ensured to have a large enough inner diameter, and subsequent tools can be smoothly put into the well.
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 technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.
Claims (10)
1. The tail pipe suspension well cementation device comprises a lifting connector, wherein the lower end of the lifting connector is screwed with a lifting pipe, and the tail pipe suspension well cementation device is characterized in that: the lower part of the lifting pipe is screwed with a hanger, the lower end of the hanger is connected with a change-over joint, the lower end of the change-over joint is screwed with a tail pipe, a large rubber plug is arranged in an inner cavity at the top of the tail pipe, an upper port of a center hole of the large rubber plug is screwed with the lower part of the drillable joint, a horn mouth is arranged at the upper end of the center hole of the drillable joint, a small rubber plug locking groove is arranged in the middle section of the center hole of the drillable joint, centering blocks are uniformly arranged on the periphery of the upper part of the drillable joint, the centering blocks are respectively connected with the drillable joint through drillable joint shear pins, and the outer edge of the bottom of each centering block is respectively placed on the upper port of the tail pipe.
2. The liner-hung cementing device according to claim 2, wherein: the hanger comprises an inverted upper joint which is screwed below the lifting pipe, and the lower end of the inverted upper joint is screwed with a downward extending central pipe through an inverted lower joint; the periphery of the upper reverse buckle joint is provided with a sealing box shell, an inverted buckle nut is sleeved on the external spline of the middle section of the upper reverse buckle joint, and the periphery of the inverted buckle nut is connected with the middle section of the sealing box shell in a rotating mode.
3. The liner-hung cementing device according to claim 2, wherein: the outer wall of center tube with be equipped with sealed box body between the inner wall of seal box shell, the lower extreme of seal box shell has connect soon and has gone up the liquid cylinder body, the upper portion of going up the liquid cylinder body is fixed with the taper sleeve, the lower extreme of going up the taper sleeve is pegged graft in the interior taper hole of each slips piece, and the lower extreme of each slips piece is fixed on the upper portion of going up the liquid cylinder liner, go up the periphery at last liquid cylinder body of liquid cylinder liner suit, the lower part of going up the liquid cylinder liner is fixed on going up the liquid cylinder body through going up liquid cylinder liner shear pin, is equipped with hydraulic chamber between the middle part inner wall of going up the liquid cylinder liner and the outer wall of last liquid cylinder body, go up be equipped with the discharge orifice on the liquid cylinder body with it communicates with each other to go up the hydraulic chamber.
4. The liner-hung cementing device according to claim 2, wherein: the lower part of the outer step of the upper part of the upper connector of the reverse buckle is provided with a plane bearing, the bottom of the plane bearing is supported on the inner step of the upper part of the sealing box shell through a small shaft sleeve, a spring is arranged below the small shaft sleeve, and the lower part of the spring is supported on the top of the reverse buckle nut.
5. The liner-hung cementing device according to claim 2, wherein: the upper end of the sealing box shell is provided with a large shaft sleeve, the large shaft sleeve is fixed on the periphery of the upper end of the upper reversing joint through a screw, and an overflowing channel is arranged between a conical head at the lower end of the large shaft sleeve and an upper port of the sealing box shell.
6. A liner-hung cementing device according to claim 3, wherein: the lower end of the upper hydraulic cylinder body is connected with a lower hydraulic cylinder body through an upper coupling, a lower taper sleeve is fixed on the upper portion of the lower hydraulic cylinder body, the lower end of the lower taper sleeve is inserted into an inner taper hole of each lower slip sheet, the lower end of each lower slip sheet is fixed on the lower portion of a lower hydraulic cylinder sleeve, the lower hydraulic cylinder sleeve is sleeved on the periphery of the lower hydraulic cylinder body, and the lower portion of the lower hydraulic cylinder sleeve is fixed on the lower hydraulic cylinder body through a lower hydraulic cylinder sleeve shear pin; and a lower hydraulic cavity is arranged between the inner wall of the middle part of the lower hydraulic cylinder sleeve and the outer wall of the lower hydraulic cylinder body, and an overflowing hole is formed in the lower hydraulic cylinder body and communicated with the lower hydraulic cavity.
7. The liner-hung cementing device according to claim 6, wherein: the periphery of the middle section of the upper hydraulic cylinder body is embedded with an upper check ring of the upper hydraulic cylinder body, and the periphery of the middle section of the lower hydraulic cylinder body is embedded with an upper check ring of the lower hydraulic cylinder body; the top of the upper taper sleeve is abutted against the lower part of the sealing box shell, and the top of the lower taper sleeve is abutted against the lower part of the upper coupling.
8. The liner-hung cementing device according to claim 6, wherein: the top of the sealed box body is abutted against the lower part of the upper step of the central tube, and the lower end of the sealed box body is uniformly provided with a plurality of elastic clamping jaws; the lower end of the upper hydraulic cylinder body is connected with a tail pipe connecting short joint through a lower coupling; the lower end of the central tube extends to the inner cavity of the tail tube connecting nipple and is screwed with a central tube threaded sleeve, and a central tube caulking groove for embedding each elastic clamping jaw is formed in the upper portion of the central tube threaded sleeve.
9. The liner-hung cementing device according to claim 8, wherein: and a plurality of forced liquid inlet holes are uniformly distributed on the circumference of the central pipe caulking groove.
10. The liner-hung cementing device according to claim 6, wherein: the bottom of the upper hydraulic cylinder sleeve abuts against a lower retaining ring of an upper hydraulic cylinder body, the lower retaining ring of the upper hydraulic cylinder body is embedded in the outer wall of the lower part of the upper hydraulic cylinder body, and an upper centering sleeve is sleeved below the lower step of the upper hydraulic cylinder body; the bottom of the lower hydraulic cylinder sleeve abuts against a lower retaining ring of the lower hydraulic cylinder body, the lower retaining ring of the lower hydraulic cylinder body is embedded in the outer wall of the lower part of the lower hydraulic cylinder body, and a lower centering sleeve is sleeved below the lower step of the lower hydraulic cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111187410.8A CN113818826A (en) | 2021-10-12 | 2021-10-12 | Tail pipe suspension well cementation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111187410.8A CN113818826A (en) | 2021-10-12 | 2021-10-12 | Tail pipe suspension well cementation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113818826A true CN113818826A (en) | 2021-12-21 |
Family
ID=78916451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111187410.8A Pending CN113818826A (en) | 2021-10-12 | 2021-10-12 | Tail pipe suspension well cementation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113818826A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201110143Y (en) * | 2007-10-15 | 2008-09-03 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Fluid pressure tailpiece hanger |
| CN102409990A (en) * | 2011-12-26 | 2012-04-11 | 中国石油集团渤海钻探工程有限公司 | Positioning hanger |
| CN105569592A (en) * | 2014-10-11 | 2016-05-11 | 中国石油化工股份有限公司 | Pipe string operation method with convenient release equipment determination and drilling liner hanger system |
| US20200370387A1 (en) * | 2018-04-27 | 2020-11-26 | China University Of Petroleum-Beijing | Casing hanger and annulus sealing device running tool for deepwater drilling, and method for using the same |
-
2021
- 2021-10-12 CN CN202111187410.8A patent/CN113818826A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201110143Y (en) * | 2007-10-15 | 2008-09-03 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Fluid pressure tailpiece hanger |
| CN102409990A (en) * | 2011-12-26 | 2012-04-11 | 中国石油集团渤海钻探工程有限公司 | Positioning hanger |
| CN105569592A (en) * | 2014-10-11 | 2016-05-11 | 中国石油化工股份有限公司 | Pipe string operation method with convenient release equipment determination and drilling liner hanger system |
| US20200370387A1 (en) * | 2018-04-27 | 2020-11-26 | China University Of Petroleum-Beijing | Casing hanger and annulus sealing device running tool for deepwater drilling, and method for using the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5566757A (en) | Method and apparatus for setting sidetrack plugs in open or cased well bores | |
| CN209976509U (en) | Recovery type ash squeezing device | |
| CN215927327U (en) | Multifunctional integrated bridge plug | |
| CN113898314A (en) | Quick drilling type sitting and squeezing integrated temporary plugging device | |
| CN113818826A (en) | Tail pipe suspension well cementation device | |
| CN215927301U (en) | High-reliability tail pipe hanger | |
| CN108060901B (en) | Release mechanism for open hole patching tool of equal-well-diameter expansion casing | |
| CN201092845Y (en) | Hydraulic pressure, double back-off hand type dragable bridge plug | |
| CN110410026A (en) | A kind of air drilling naked eye windowing wedge deflection tool hanging tool | |
| CN115199228B (en) | Drilling-free windowing sidetracking tool and casing windowing sidetracking construction method | |
| CN206144508U (en) | Oil -water well packer | |
| CN212716504U (en) | Side drilling tail pipe suspension device | |
| CN116006078A (en) | Recyclable whipstock for multi-branch horizontal well and downward-falling recycling method of recyclable whipstock | |
| CN212671721U (en) | Integrated pumping linkage pressurized rotary pumping pipe column and plugging tool | |
| CN209959209U (en) | Separate and adopt packer | |
| RU2343272C2 (en) | Cementing valve of casing string | |
| CN107642344A (en) | Buckling type tail pipe hanger | |
| CN209908452U (en) | Separate and adopt packer | |
| CN114135244A (en) | Hydraulic variable-level expansion tool for plugging while drilling and process method | |
| CN209780833U (en) | Separate and adopt packer | |
| CN103821472A (en) | Fishing bottom plug and fishing tool combination for expansion pipe | |
| CN207348815U (en) | Buckling type tail pipe hanger | |
| CN114427438A (en) | Multifunctional pressure testing device for shaft | |
| CN214196258U (en) | Compound sealing packer | |
| CN113738314A (en) | Integrated pumping linkage pressurized rotary pumping pipe column, plugging tool and plugging method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |