CN117248844B - Oil gas well tail pipe hanger - Google Patents
Oil gas well tail pipe hanger Download PDFInfo
- Publication number
- CN117248844B CN117248844B CN202311463888.8A CN202311463888A CN117248844B CN 117248844 B CN117248844 B CN 117248844B CN 202311463888 A CN202311463888 A CN 202311463888A CN 117248844 B CN117248844 B CN 117248844B
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- sleeve
- butt joint
- tail pipe
- oil
- positioning
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- 210000001503 joint Anatomy 0.000 claims abstract description 144
- 230000001681 protective effect Effects 0.000 claims abstract description 36
- 238000007667 floating Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 39
- 230000007246 mechanism Effects 0.000 claims description 30
- 230000005540 biological transmission Effects 0.000 claims description 13
- 244000309464 bull Species 0.000 claims description 10
- 238000003973 irrigation Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 description 14
- 238000009434 installation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
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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)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses an oil and gas well tail pipe hanger, which relates to the technical field of tail pipe hangers and comprises a protective sleeve and an oil and gas tail pipe; the hydraulic part is used for adjusting the internal pressure of the oil gas tail pipe, so that the pressure difference between the inside of the pipe and the outside of the pipe is formed, the oil gas tail pipe has better anti-seepage performance and anti-floating performance, the hydraulic part comprises a sleeve top supporting plate fixedly installed on a protective sleeve, a driving hydraulic cylinder is fixedly installed on the sleeve top supporting plate, a pressure-regulating oil pipe is fixedly installed at the driving end of the driving hydraulic cylinder, and an airtight conical head is fixedly installed at one end, far away from the driving hydraulic cylinder, of the pressure-regulating oil pipe. The advantages are that: the torque required by the butt joint of the oil gas tail pipe and the hanger is smaller, the wind resistance vortex resistance generated during the butt joint is smaller, the collapse probability of the well wall is reduced, and meanwhile, the probability of loosening between the oil gas tail pipe and the hanger is reduced, so that the oil gas tail pipe and the hanger are connected into a whole, the purpose of improving the stability of underground equipment is achieved, and the grouting efficiency and quality are improved.
Description
Technical Field
The invention relates to the technical field of liner hangers, in particular to an oil and gas well liner hanger.
Background
The tail pipe hanger is a downhole tool used in an oil and gas well, and is generally divided into a mechanical type tail pipe hanger and a hydraulic type tail pipe hanger, and mainly comprises a tail pipe hanger assembly, a feeding tool assembly, a sealing assembly, a ball seat assembly, a rubber plug, a float collar, a float shoe, a central pipe coupling and the like.
Through retrieval, application number CN201110243477.9 discloses an expansion type rotatable liner hanger, which comprises a hanger body and a running tool system, wherein the hanger body adopts an expandable metal pipe, a group of triangular annular protrusions are designed on the outer surface of an expansion section of the hanger body, an annular rubber section is vulcanized between two adjacent triangular annular protrusions, and the diameter of the annular rubber section is larger than the outer diameter of the top of the triangular annular protrusions.
The liner hanger has the following disadvantages in the specific use process:
1. the hanger is in threaded rotation butt joint with the tail pipe, the whole hanger is required to rotate in the butt joint process of the hanger and the tail pipe, the hanger rotates to need stronger torque, torque equipment to be equipped is high in energy consumption, wind resistance vortexes can be generated when the whole hanger rotates, and the probability of well wall collapse can be increased.
2. The hanger and the tail pipe are in threaded rotation butt joint, the whole hanger is required to rotate in the butt joint process of the hanger and the tail pipe, so that the hanger can drive the tail pipe to rotate together, the reverse rotation of the hanger can lead to the tail pipe in threaded butt joint to be separated from the hanger, and certain safety risks exist.
Therefore, the novel oil and gas well tail pipe hanger can be adopted to solve the defects in the prior art.
Disclosure of Invention
The invention aims to solve the problems of increasing the collapse probability of a well wall and the falling probability of a tail pipe in the prior art, and provides an oil-gas well tail pipe hanger.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an oil and gas well liner hanger comprising:
protective sleeve and oil gas tail pipe;
the hydraulic part is used for adjusting the internal pressure of the oil gas tail pipe 7 to ensure that the pressure difference between the inside of the pipe and the outside of the pipe is formed, and the oil gas tail pipe has better anti-seepage performance and anti-floating performance;
the expansion pressure-holding part is used for holding pressure of the tail part of the hanger so that the pressure intensity inside the oil gas tail pipe communicated with the tail part of the hanger is consistent with the pressure intensity of the tail part of the hanger so as to facilitate grouting, the expansion pressure-holding part comprises a sealing anti-irrigation sleeve fixedly arranged on a protective sleeve, a positioning sleeve is fixedly arranged on the sealing anti-irrigation sleeve through a connecting rod, a butt-joint expansion sleeve is arranged on the positioning sleeve through a fixing mechanism, a plurality of expansion groove bodies are formed in the butt-joint expansion sleeve, and a sealing mechanism matched with the butt-joint expansion sleeve is arranged on the positioning sleeve;
the butt joint part is used for connecting the oil gas tail pipe and the butt joint expansion sleeve, the whole hanger does not need to be rotated, the phenomenon that the well wall collapses due to the whole rotation of the hanger can be avoided, the well wall is protected, the grouting efficiency is improved, the butt joint part comprises a butt joint fixing sleeve, and the butt joint fixing sleeve is arranged on the butt joint expansion sleeve through a rotating mechanism;
the rotating mechanism comprises a limiting rolling groove and a limiting rotating rod, a plurality of limiting rotating rods are rotatably arranged on the butt joint expansion sleeve, and a limiting rolling groove matched with the limiting rotating rods is formed in the butt joint fixing sleeve;
a driving mechanism is arranged between the butt joint fixing sleeve and the butt joint expansion sleeve;
the driving mechanism comprises transmission teeth, a servo motor and a driving gear, the servo motor is fixedly arranged on the butt joint expansion sleeve, the driving gear is fixedly arranged at the driving end of the servo motor, and a plurality of transmission teeth meshed with the driving gear are fixedly arranged on the butt joint fixing sleeve;
the butt joint fixing sleeve is provided with a butt joint thread groove, the oil gas tail pipe is provided with a mounting thread groove matched with the butt joint thread groove, and a clamping mechanism is arranged between the butt joint expansion sleeve and the oil gas tail pipe;
the clamping mechanism comprises a positioning connection rotating rod, a lower positioning anti-rotation toothed ring, a butt joint fixing plate, a connection rotating plate, an upper positioning anti-rotation toothed ring, an upper positioning support clamping column, a positioning support column, a positioning anti-sliding block and a lower positioning support clamping column;
the oil gas tail pipe is fixedly provided with a plurality of butt joint fixing plates, each butt joint fixing plate is fixedly provided with a plurality of positioning support columns, and each positioning support column is fixedly provided with a positioning anti-skid block;
every equal fixed mounting has one on the lower location anti-rotation ring gear and connects the pivoted plate, every equal slidable mounting connects the bull stick on the pivoted plate, every it connects the bull stick to fix a position to be connected between bull stick and the corresponding connection pivoted plate to be rotated, every equal fixed mounting has a plurality of and corresponds down location anti-rotation ring gear and last location anti-rotation ring gear matched with last location support card post on the bull stick, every equal fixed mounting has a plurality of and corresponds location support post matched with lower location support card post on the bull stick, every location is connected and is all installed reset structure between bull stick and the corresponding connection pivoted plate.
Preferably, a plurality of deformation-preventing reinforcing hoops are fixedly arranged outside the sealing anti-irrigation sleeve through expansion screws, and two adjacent deformation-preventing reinforcing hoops are fixedly connected through an arc-shaped communication plate.
Preferably, the fixing mechanism comprises a butt joint fixing support and a butt joint mounting sleeve, the butt joint mounting sleeve is fixedly mounted on the positioning sleeve, the butt joint mounting sleeve is in sliding connection with the pressure-regulating oil and gas pipe, a plurality of butt joint fixing supports are fixedly mounted on the butt joint mounting sleeve, and the butt joint fixing supports are fixedly connected with the butt joint expansion sleeve.
Preferably, the sealing mechanism comprises a protection sleeve and a sealing ring, wherein a protection sleeve is fixedly installed between the positioning sleeve and the butt-joint expansion sleeve together, sealing ring grooves are formed in the positioning sleeve and the butt-joint expansion sleeve, and two sealing rings matched with the corresponding sealing ring grooves are fixedly installed on the protection sleeve.
Preferably, a plurality of buffering elastic steel sheets are fixedly installed on the protective sleeve, each buffering elastic steel sheet is fixedly connected with the protective sleeve through a butt bolt, and a plurality of expansion explosion-proof grooves are formed in the protective sleeve.
Preferably, a protective shell matched with the transmission gear, the driving gear and the servo motor is fixedly arranged on the butt-joint expansion sleeve, and a sealing rubber ring propped against the butt-joint fixing sleeve is fixedly arranged on the protective shell.
Preferably, the reset structure comprises a reset rebound plate and reset springs, wherein the reset rebound plate is rotatably arranged on the positioning connection rotating rod, and a plurality of reset springs are fixedly arranged between the reset rebound plate and the connection rotating plate.
Compared with the prior art, the invention has the advantages that:
1: in the specific use process, the butt joint fixing sleeve can be driven to rotate by the driving of the servo motor, so that the butt joint of the oil gas tail pipe and the butt joint expansion sleeve is realized, the whole rotation of the hanger is not needed for connection, the required driving torque is greatly reduced, the energy consumption is reduced, the cost is low, and the environment-friendly performance is better.
2: in the specific use process, the single butt joint fixed sleeve is adopted to rotate to connect the oil gas tail pipes, wind resistance vortex generated by the rotating part is small, the collapse probability of the oil gas well wall is reduced, the oil gas well wall is effectively protected, meanwhile, the collapse amount is small, the grouting stability of the oil gas well can be improved, and the grouting quality is improved.
3: after the oil gas tail pipe is butted, the oil gas tail pipe can be locked, the joint thread groove and the installation thread groove can be effectively prevented from being separated due to reverse rotation of the hanger, and accordingly the probability of separation of the oil gas tail pipe and the joint expansion sleeve is caused, and the stability of connection of the oil gas tail pipe and the joint expansion sleeve is improved.
4: in the specific use process, the invention not only can reduce the loosening probability between the oil gas tail pipe and the butt-joint expansion sleeve, but also can ensure that the oil gas tail pipe and the butt-joint expansion sleeve are connected into a whole, thereby expanding the whole mention of grouting underground equipment, achieving the purpose of improving the stability of the underground equipment and improving the grouting efficiency and quality.
In summary, the invention makes the torque required by the butt joint of the oil gas tail pipe and the hanger smaller, the wind resistance vortex resistance generated during the butt joint smaller, reduces the collapse probability of the well wall, and simultaneously can reduce the loosening probability between the oil gas tail pipe and the hanger, so that the oil gas tail pipe and the hanger are connected into a whole, thereby achieving the purpose of improving the stability of underground equipment and improving the grouting efficiency and quality.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic view of a tubing hanger for an oil and gas well according to the present invention;
FIG. 2 is a schematic detail view of the structure of FIG. 1 rotated by a certain angle;
FIG. 3 is a schematic detail view of the protective sleeve and protective cover of FIG. 1 with the protective sleeve removed;
FIG. 4 is a schematic detail view of the construction of FIG. 3 with the locating sleeve removed and the anti-drip sleeve sealed;
FIG. 5 is a schematic detailed view of the docking sleeve and its peripheral components of FIG. 4;
FIG. 6 is a schematic detailed view of the pressure regulating air pipe section of FIG. 4;
FIG. 7 is a schematic detail view of the butt-jointed retaining sleeve portion of FIG. 5;
FIG. 8 is a schematic detailed view of the structure of FIG. 5 rotated a certain angle;
FIG. 9 is a schematic detail view of the structure of FIG. 5 with the docking station sleeves removed;
FIG. 10 is a schematic detail view of the detent connection lever and its peripheral portion of FIG. 9;
FIG. 11 is a schematic detail view of the lower retaining anti-rotation ring portion of FIG. 10;
FIG. 12 is an exploded schematic detail view of FIG. 10;
fig. 13 is a schematic detailed view of the sealing anti-irrigation sleeve of fig. 2.
In the figure: the device comprises a protective sleeve 1, a top supporting plate 2, a sealing anti-irrigation sleeve 3, a positioning sleeve 4, a protective sleeve 5, a protective shell 6, an oil-gas tail pipe 7, a butt joint fixing sleeve 8, a driving hydraulic cylinder 9, a pressure-regulating oil-gas pipe 10, a butt joint expanding sleeve 11, a transmission gear 12, a servo motor 13, a driving gear 14, a butt joint thread groove 15, a limit rolling groove 16, a limit rotating rod 17, a positioning connection rotating rod 18, a lower positioning anti-rotating toothed ring 19, a butt joint fixing plate 20, a connecting rotating plate 21, an upper positioning anti-rotating toothed ring 22, an upper positioning supporting clamping column 23, a positioning supporting column 24, a 25 positioning anti-sliding block 26, a lower positioning supporting clamping column, a reset rebound plate 27, a reset spring 28, a deformation-preventing reinforcing sleeve 29, a buffering elastic steel sheet 30, a mounting thread groove 31, a butt joint fixing support 32, a butt joint mounting sleeve 33, an expansion anti-explosion groove 34, an expanding groove 35 and a 36 airtight conical head.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4 and 6, a hydrocarbon well liner hanger comprising:
a protective sleeve 1 and an oil and gas tail pipe 7;
the hydraulic part is used for adjusting the internal pressure of the oil gas tail pipe 7 to ensure that the pressure difference between the inside of the pipe and the outside of the pipe is formed, and the oil gas tail pipe has better anti-seepage performance and anti-floating performance, the hydraulic part comprises a sleeve top supporting plate 2 fixedly arranged on a protective sleeve 1, a driving hydraulic cylinder 9 is fixedly arranged on the sleeve top supporting plate 2, a pressure-regulating oil pipe 10 is fixedly arranged at the driving end of the driving hydraulic cylinder 9, and an airtight conical head 36 is fixedly arranged at one end of the pressure-regulating oil pipe 10 far away from the driving hydraulic cylinder 9;
firstly, the hydraulic cylinder 9 is driven to push the pressure-regulating oil pipe 10 to move, so that the airtight conical head 36 on the pressure-regulating oil pipe 10 moves downwards, and as the middle part of the airtight conical head 36 is provided with a pressure relief hole, the airtight conical head 36 is extruded and deformed along with the movement of the airtight conical head 36, so that the pressure relief hole on the airtight conical head 36 is blocked, and the inside of the pressure-regulating oil pipe 10 reaches a sealing state;
the airtight cone 36 is preferably made of rubber, and the airtight cone 36 has strong high temperature resistance and wear resistance, and the rubber is used for prolonging the service life in order to improve the air tightness;
referring to fig. 1-5, 7-8 and 13, the expansion pressure-holding part is used for holding pressure of the oil gas tail pipe 7, so that the pressure inside the oil gas tail pipe 7 communicated with the tail of the hanger is consistent with the pressure of the tail of the hanger, grouting is smoother, the expansion pressure-holding part comprises a sealing anti-grouting sleeve 3 fixedly installed on a protective sleeve 1, a positioning sleeve 4 is fixedly installed on the sealing anti-grouting sleeve 3 through a connecting rod, a butt-joint expansion sleeve 11 is installed on the positioning sleeve 4 through a fixing mechanism, a plurality of expansion groove bodies 35 are formed on the butt-joint expansion sleeve 11, and a sealing mechanism matched with the butt-joint expansion sleeve 11 is installed on the positioning sleeve 4;
the fixing mechanism comprises a butt joint fixing support 32 and a butt joint mounting sleeve 33, the butt joint mounting sleeve 33 is fixedly mounted on the positioning sleeve 4, the butt joint mounting sleeve 33 is in sliding connection with the pressure-regulating oil and gas pipe 10, a plurality of butt joint fixing supports 32 are fixedly mounted on the butt joint mounting sleeve 33, and the plurality of butt joint fixing supports 32 are fixedly connected with the butt joint expansion sleeve 11;
the sealing mechanism comprises a protective sleeve 5 and a sealing ring, wherein the protective sleeve 5 is fixedly installed between the positioning sleeve 4 and the butt-joint expansion sleeve 11, sealing ring grooves are formed in the positioning sleeve 4 and the butt-joint expansion sleeve 11, and two sealing rings matched with the corresponding sealing ring grooves are fixedly installed on the protective sleeve 5;
the protection sleeve 5 is fixedly provided with a plurality of buffering elastic steel sheets 30, each buffering elastic steel sheet 30 is fixedly connected with the protection sleeve 5 through a butt bolt, and the protection sleeve 5 is provided with a plurality of expansion explosion-proof grooves 34;
a plurality of deformation-preventing reinforcing hoops 29 are fixedly arranged outside the sealing anti-irrigation sleeve 3 through expansion screws, and two adjacent deformation-preventing reinforcing hoops 29 are fixedly connected through an arc-shaped communicating plate;
the sealing anti-irrigation sleeve 3 is used for protecting the driving hydraulic cylinder 9 and preventing the driving hydraulic cylinder 9 from penetrating sewage or sludge;
the anti-deformation reinforcing hoops 29 and the arc-shaped communication plates are used for reinforcing the sealing anti-irrigation sleeve 3, so that the probability of extrusion deformation of the sealing anti-irrigation sleeve 3 is reduced;
the buffer elastic steel sheet 30 is used for reducing the vibration amplitude generated by the falling collision of the hanger, so that the falling is smoother.
The expansion explosion-proof groove 34 can reduce the thickness of the side wall of the protective sleeve 5, and can deform the part under the action of pressure, so that the purposes of expanding the inner space and reducing the pressure are achieved, and the explosion-proof effect is achieved.
Referring to fig. 1-5 and 7-9, the butt joint part is used for connecting the oil gas tail pipe 7 and the butt joint expansion sleeve 11, the whole hanger does not need to be rotated, the phenomenon that the well wall collapses caused by the whole rotation of the hanger can be avoided, the butt joint energy consumption is low, the butt joint part comprises a butt joint fixing sleeve 8, the butt joint expansion sleeve 11 is provided with the butt joint fixing sleeve 8 through a rotating mechanism, and a driving mechanism is arranged between the butt joint fixing sleeve 8 and the butt joint expansion sleeve 11;
the butt joint fixing sleeve 8 has the effects that in order to facilitate connection of the oil gas tail pipe 7, the whole rotation butt joint of a hanger is not needed, the single butt joint fixing sleeve 8 is adopted to rotate to connect the oil gas tail pipe 7, windage vortex generated by the rotation part is small, the collapse probability of an oil gas well wall is reduced, the oil gas well wall is effectively protected, meanwhile, the collapse amount is small, the grouting stability of the oil gas well is improved, and the grouting quality is improved;
the rotating mechanism comprises a limiting rolling groove 16 and a limiting rotating rod 17, a plurality of limiting rotating rods 17 are rotatably arranged on the butt-joint expansion sleeve 11, and the butt-joint fixing sleeve 8 is provided with the limiting rolling groove 16 which is matched with the limiting rotating rods 17;
the butt joint fixing sleeve 8 can enable the limit rotating rod 17 to slide in the limit rolling groove 16 on the butt joint fixing sleeve 8, so that the butt joint fixing sleeve 8 is limited, and the butt joint fixing sleeve 8 can only rotate on the butt joint expansion sleeve 11 and cannot move;
simultaneously, the limiting rotating rod 17 is rotationally connected with the butt-joint expansion sleeve 11, and the limiting rotating rod 17 can be driven to rotate along with the rotation of the butt-joint fixing sleeve 8, so that the effect of reducing friction force is achieved, the butt-joint fixing sleeve 8 can rotate more smoothly, and the service life of the butt-joint fixing sleeve 8 is prolonged.
The driving mechanism comprises a transmission gear 12, a servo motor 13 and a driving gear 14, the servo motor 13 is fixedly arranged on the butt joint expansion sleeve 11, the driving gear 14 is fixedly arranged at the driving end of the servo motor 13, and a plurality of transmission gears 12 meshed with the driving gear 14 are fixedly arranged on the butt joint fixing sleeve 8;
the servo motor 13 is started to drive the driving gear 14 to rotate, the butt joint fixing sleeve 8 is driven to rotate by matching with the transmission gear 12, the purpose of autorotation of the butt joint fixing sleeve 8 is achieved, wind resistance vortex generated by driving the butt joint fixing sleeve 8 to rotate is small, and the collapse probability of the oil and gas well wall is reduced.
The butt joint expansion sleeve 11 is fixedly provided with a protective shell 6 matched with the transmission gear 12, the driving gear 14 and the servo motor 13, and the protective shell 6 is fixedly provided with a sealing rubber ring propped against the butt joint fixing sleeve 8;
the protective shell 6 is used for protecting the transmission gear 12, the driving gear 14 and the servo motor 13, so that the influence of sewage and sludge in an oil-gas well on the transmission gear 12, the driving gear 14 and the servo motor 13 is reduced;
the sealing rubber ring is used for improving the tightness of the protective shell 6 and further improving the protective performance of the protective shell 6.
Referring to fig. 1-5 and 9-12, a butt joint thread groove 15 is formed in the butt joint fixing sleeve 8, a mounting thread groove 31 matched with the butt joint thread groove 15 is formed in the oil gas tail pipe 7, and a clamping mechanism is arranged between the butt joint expansion sleeve 11 and the oil gas tail pipe 7;
the butt joint of the butt joint thread groove 15 and the installation thread groove 31 is realized through the rotation of the butt joint fixing sleeve 8, so that the butt joint of the butt joint fixing sleeve 8 and the oil gas tail pipe 7 is realized, and the installation and the disassembly of the oil gas tail pipe 7 are more convenient by adopting the threaded installation of the butt joint thread groove 15 and the installation thread groove 31.
The clamping mechanism comprises a positioning connection rotating rod 18, a lower positioning anti-rotation toothed ring 19, a butt joint fixing plate 20, a connection rotating plate 21, an upper positioning anti-rotation toothed ring 22, an upper positioning support clamping column 23, a positioning support column 24, a positioning anti-sliding block 25 and a lower positioning support clamping column 26;
a plurality of lower positioning anti-rotation toothed rings 19 and a plurality of upper positioning anti-rotation toothed rings 22 matched with the lower positioning anti-rotation toothed rings 19 are fixedly arranged on the butting and expanding sleeve 11, a plurality of butting and fixing plates 20 are fixedly arranged on the oil-gas tail pipe 7, a plurality of positioning support columns 24 are fixedly arranged on each butting and fixing plate 20, and a positioning anti-skid block 25 is fixedly arranged on each positioning support column 24;
each lower locating anti-rotation toothed ring 19 is fixedly provided with a connecting rotation plate 21, each connecting rotation plate 21 is provided with a locating connection rotating rod 18 in a sliding manner, each locating connection rotating rod 18 is in rotary connection with the corresponding connecting rotation plate 21, each locating connection rotating rod 18 is fixedly provided with a plurality of upper locating support clamping columns 23 matched with the corresponding lower locating anti-rotation toothed ring 19 and the upper locating anti-rotation toothed ring 22, each locating connection rotating rod 18 is fixedly provided with a plurality of lower locating support clamping columns 26 matched with the corresponding locating support columns 24, and a reset structure is arranged between each locating connection rotating rod 18 and the corresponding connecting rotation plate 21;
along with the rotation of the butt joint fixing sleeve 8, the oil gas tail pipe 7 is driven to move in the butt joint fixing sleeve 8, the positioning connection rotating rod 18 is driven to move under the action of the butt joint fixing plate 20, the positioning connection rotating rod 18 can be driven to rotate by being matched with the use of the upper positioning anti-rotation toothed ring 22 and the upper positioning support clamping post 23, then the servo motor 13 is reversed, the positioning connection rotating rod 18 falls back under the action of gravity at the moment, and the positioning connection rotating rod 18 continues to rotate under the action of the lower positioning anti-rotation toothed ring 19 until the upper positioning support clamping post 23 is clamped into a groove on the lower positioning anti-rotation toothed ring 19;
at the moment, the lower positioning support clamping column 26 is clamped into the positioning anti-skid block 25 to lock the lower positioning support clamping column 26, and the servo motor 13 continues to rotate at the moment to drive the positioning connection rotating rod 18 and the oil gas tail pipe 7 to rotate together;
if disassembly is needed, the driving end of the forward rotation servo motor 13 is positively rotated, the oil gas tail pipe 7 is driven to move in the butt joint fixing sleeve 8, the positioning connection rotating rod 18 is driven to move under the action of the butt joint fixing plate 20, the positioning connection rotating rod 18 can be driven to rotate by being matched with the use of the upper positioning anti-rotation toothed ring 22 and the upper positioning support clamping post 23, then the servo motor 13 is reversed, the positioning connection rotating rod 18 falls back under the action of gravity, and the positioning connection rotating rod 18 continues to rotate under the action of the lower positioning anti-rotation toothed ring 19 until the upper positioning support clamping post 23 is clamped into a groove on the lower positioning anti-rotation toothed ring 19;
at the moment, the lower positioning support clamping column 26 is separated from the positioning anti-skid block 25, and then the driving end of the servo motor 13 is reversed, so that the butt joint fixing sleeve 8 is separated from the oil-gas tail pipe 7;
the function of the part is to lock the oil gas tail pipe 7, so that the oil gas tail pipe 7 can be effectively placed, the butt joint thread groove 15 and the installation thread groove 31 are separated due to the reverse rotation of the hanger, the probability of separating the oil gas tail pipe 7 from the butt joint expansion sleeve 11 is caused, and the stability of connecting the oil gas tail pipe 7 with the butt joint expansion sleeve 11 is improved;
the reset structure comprises a reset rebound plate 27 and a reset spring 28, wherein the reset rebound plate 27 is rotatably arranged on the positioning connection rotating rod 18, and a plurality of reset springs 28 are fixedly arranged between the reset rebound plate 27 and the connection rotating plate 21;
the above mentioned positioning connection rotating rod 18 falls back under the action of gravity, and the part is to press the positioning connection rotating rod 18 back, so as to accelerate the falling speed of the positioning connection rotating rod 18, reduce the blocking probability of the positioning connection rotating rod 18, and enable the falling of the positioning connection rotating rod 18 to be smoother.
The specific operation steps of the invention are as follows:
docking the oil gas tail pipe 7: the servo motor 13 is started to drive the driving gear 14 to rotate, and the driving gear 12 is matched to drive the butt joint fixing sleeve 8 to rotate, so that the aim of autorotation of the butt joint fixing sleeve 8 is fulfilled;
the rotation of the butt joint fixing sleeve 8 can enable the limit rotating rod 17 to slide in the limit rolling groove 16 on the butt joint fixing sleeve 8, so that the butt joint fixing sleeve 8 is limited, and the butt joint fixing sleeve 8 can only rotate on the butt joint expansion sleeve 11 and cannot move;
the butt joint of the butt joint thread groove 15 and the installation thread groove 31 is realized through the rotation of the butt joint fixing sleeve 8, so that the butt joint of the butt joint fixing sleeve 8 and the oil gas tail pipe 7 is realized;
the oil gas tail pipe 7 is locked: along with the rotation of the butt joint fixing sleeve 8, the oil gas tail pipe 7 is driven to move in the butt joint fixing sleeve 8, the positioning connection rotating rod 18 is driven to move under the action of the butt joint fixing plate 20, the positioning connection rotating rod 18 can be driven to rotate by being matched with the use of the upper positioning anti-rotation toothed ring 22 and the upper positioning support clamping post 23, then the servo motor 13 is reversed, the positioning connection rotating rod 18 falls back under the action of gravity at the moment, and the positioning connection rotating rod 18 continues to rotate under the action of the lower positioning anti-rotation toothed ring 19 until the upper positioning support clamping post 23 is clamped into a groove on the lower positioning anti-rotation toothed ring 19;
at the moment, the lower positioning support clamping column 26 is clamped into the positioning anti-skid block 25 to lock the lower positioning support clamping column 26, and the servo motor 13 continues to rotate at the moment to drive the positioning connection rotating rod 18 and the oil gas tail pipe 7 to rotate together;
disassembling the oil gas tail pipe 7: if disassembly is needed, the driving end of the forward rotation servo motor 13 is positively rotated, the oil gas tail pipe 7 is driven to move in the butt joint fixing sleeve 8, the positioning connection rotating rod 18 is driven to move under the action of the butt joint fixing plate 20, the positioning connection rotating rod 18 can be driven to rotate by being matched with the use of the upper positioning anti-rotation toothed ring 22 and the upper positioning support clamping post 23, then the servo motor 13 is reversed, the positioning connection rotating rod 18 falls back under the action of gravity, and the positioning connection rotating rod 18 continues to rotate under the action of the lower positioning anti-rotation toothed ring 19 until the upper positioning support clamping post 23 is clamped into a groove on the lower positioning anti-rotation toothed ring 19;
at the moment, the lower positioning support clamping column 26 is separated from the positioning anti-skid block 25, and then the driving end of the servo motor 13 is reversed, so that the butt joint fixing sleeve 8 is separated from the oil-gas tail pipe 7;
pressure holding: firstly, the hydraulic cylinder 9 is driven to push the pressure-regulating oil pipe 10 to move, so that the airtight conical head 36 on the pressure-regulating oil pipe 10 moves downwards, and as the middle part of the airtight conical head 36 is provided with a pressure relief hole, the airtight conical head 36 can be extruded and deformed along with the movement of the airtight conical head 36, so that the pressure relief hole on the airtight conical head 36 is blocked, and the inside of the pressure-regulating oil pipe 10 reaches a sealing state.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. An oil and gas well liner hanger, comprising:
a protective sleeve (1) and an oil gas tail pipe (7);
the hydraulic part is used for adjusting the internal pressure of the oil gas tail pipe (7) to ensure that the pressure difference between the inside of the pipe and the outside of the pipe is formed, and the oil gas tail pipe has better anti-seepage performance and anti-floating performance, the hydraulic part comprises a sleeve top supporting plate (2) fixedly arranged on a protective sleeve (1), a driving hydraulic cylinder (9) is fixedly arranged on the sleeve top supporting plate (2), a pressure-adjusting oil pipe (10) is fixedly arranged at the driving end of the driving hydraulic cylinder (9), and an airtight conical head (36) is fixedly arranged at one end, far away from the driving hydraulic cylinder (9), of the pressure-adjusting oil pipe (10);
the expansion pressure-holding part is used for holding pressure of the oil gas tail pipe (7), so that the internal pressure of the oil gas tail pipe (7) communicated with the tail of the hanger is consistent with the tail pressure of the hanger, grouting is smoother, the expansion pressure-holding part comprises a sealing anti-grouting sleeve (3) fixedly installed on a protective sleeve (1), a positioning sleeve (4) is fixedly installed on the sealing anti-grouting sleeve (3) through a connecting rod, a butt-joint expansion sleeve (11) is installed on the positioning sleeve (4) through a fixing mechanism, a plurality of expansion groove bodies (35) are formed in the butt-joint expansion sleeve (11), and a sealing mechanism matched with the butt-joint expansion sleeve (11) is installed on the positioning sleeve (4);
the butt joint part is used for connecting the oil gas tail pipe (7) and the butt joint expansion sleeve (11), the whole hanger does not need to be rotated, the whole hanger can be prevented from rotating, the butt joint energy consumption is low, the butt joint part comprises a butt joint fixing sleeve (8), and the butt joint fixing sleeve (8) is arranged on the butt joint expansion sleeve (11) through a rotating mechanism;
the rotating mechanism comprises a limiting rolling groove (16) and a limiting rotating rod (17), a plurality of limiting rotating rods (17) are rotatably arranged on the butt joint expansion sleeve (11), and the butt joint fixing sleeve (8) is provided with the limiting rolling groove (16) which is matched with the plurality of limiting rotating rods (17);
a driving mechanism is arranged between the butt joint fixing sleeve (8) and the butt joint expansion sleeve (11);
the driving mechanism comprises transmission teeth (12), a servo motor (13) and a driving gear (14), the servo motor (13) is fixedly arranged on the butt joint expansion sleeve (11), the driving gear (14) is fixedly arranged on the driving end of the servo motor (13), and a plurality of transmission teeth (12) meshed with the driving gear (14) are fixedly arranged on the butt joint fixing sleeve (8);
a butt joint thread groove (15) is formed in the butt joint fixing sleeve (8), a mounting thread groove (31) matched with the butt joint thread groove (15) is formed in the oil gas tail pipe (7), and a clamping mechanism is arranged between the butt joint expansion sleeve (11) and the oil gas tail pipe (7);
the clamping mechanism comprises a positioning connection rotating rod (18), a lower positioning anti-rotation toothed ring (19), a butt joint fixing plate (20), a connection rotating plate (21), an upper positioning anti-rotation toothed ring (22), an upper positioning support clamping column (23), a positioning support column (24), a positioning anti-sliding block (25) and a lower positioning support clamping column (26);
a plurality of lower positioning anti-rotation toothed rings (19) and a plurality of upper positioning anti-rotation toothed rings (22) matched with the lower positioning anti-rotation toothed rings (19) are fixedly arranged on the butting expansion sleeve (11), a plurality of butting fixing plates (20) are fixedly arranged on the oil gas tail pipe (7), a plurality of positioning support columns (24) are fixedly arranged on each butting fixing plate (20), and a positioning anti-sliding block (25) is fixedly arranged on each positioning support column (24);
every equal fixed mounting has one on lower location anti-rotation ring gear (19) and connects rotating plate (21), every equal slidable mounting connects bull stick (18) on connecting rotating plate (21), every it connects to be the rotation between bull stick (18) and the corresponding connection rotating plate (21) to fix a position, every equal fixed mounting has a plurality of and corresponds down location anti-rotation ring gear (19) and last location anti-rotation ring gear (22) matched with last location support card post (23), every equal fixed mounting has a plurality of and corresponds location support post (24) matched with lower location support card post (26) on location connection bull stick (18), every location is connected and is all installed reset structure between bull stick (18) and the corresponding connection rotating plate (21).
2. An oil and gas well tail pipe hanger according to claim 1, wherein a plurality of anti-deformation reinforcing hoops (29) are fixedly arranged outside the sealing anti-irrigation sleeve (3) through expansion bolts, and two adjacent anti-deformation reinforcing hoops (29) are fixedly connected through an arc-shaped communication plate.
3. An oil and gas well tail pipe hanger according to claim 1, characterized in that the fixing mechanism comprises a butt joint fixing support (32) and a butt joint mounting sleeve (33), the butt joint mounting sleeve (33) is fixedly mounted on the positioning sleeve (4), the butt joint mounting sleeve (33) is in sliding connection with the pressure-regulating oil and gas pipe (10), a plurality of butt joint fixing supports (32) are fixedly mounted on the butt joint mounting sleeve (33), and a plurality of butt joint fixing supports (32) are fixedly connected with the butt joint expansion sleeve (11).
4. The oil and gas well tail pipe hanger according to claim 1, wherein the sealing mechanism comprises a protection sleeve (5) and a sealing ring, the protection sleeve (5) is fixedly installed between the positioning sleeve (4) and the butt-joint expansion sleeve (11), sealing ring grooves are formed in the positioning sleeve (4) and the butt-joint expansion sleeve (11), and two sealing rings matched with the corresponding sealing ring grooves are fixedly installed on the protection sleeve (5).
5. The oil and gas well tail pipe hanger according to claim 4, wherein a plurality of buffering elastic steel sheets (30) are fixedly installed on the protective sleeve (5), each buffering elastic steel sheet (30) is fixedly connected with the protective sleeve (5) through a butt bolt, and a plurality of expansion explosion-proof grooves (34) are formed in the protective sleeve (5).
6. An oil and gas well tail pipe hanger according to claim 1, characterized in that a protective casing (6) matched with the transmission gear (12), the driving gear (14) and the servo motor (13) is fixedly arranged on the butt joint expansion sleeve (11), and a sealing rubber ring propped against the butt joint fixing sleeve (8) is fixedly arranged on the protective casing (6).
7. An oil and gas well tail pipe hanger according to claim 1, wherein the reset structure comprises a reset rebound plate (27) and a reset spring (28), the reset rebound plate (27) is rotatably mounted on the positioning connection rotating rod (18), and a plurality of reset springs (28) are fixedly mounted between the reset rebound plate (27) and the connection rotating plate (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311463888.8A CN117248844B (en) | 2023-11-06 | 2023-11-06 | Oil gas well tail pipe hanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311463888.8A CN117248844B (en) | 2023-11-06 | 2023-11-06 | Oil gas well tail pipe hanger |
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| Publication Number | Publication Date |
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| CN117248844A CN117248844A (en) | 2023-12-19 |
| CN117248844B true CN117248844B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311463888.8A Active CN117248844B (en) | 2023-11-06 | 2023-11-06 | Oil gas well tail pipe hanger |
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| CN117248844A (en) | 2023-12-19 |
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