CN116335575A - Auxiliary device for petroleum well repairing operation - Google Patents
Auxiliary device for petroleum well repairing operation Download PDFInfo
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- CN116335575A CN116335575A CN202310579470.7A CN202310579470A CN116335575A CN 116335575 A CN116335575 A CN 116335575A CN 202310579470 A CN202310579470 A CN 202310579470A CN 116335575 A CN116335575 A CN 116335575A
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- 239000003208 petroleum Substances 0.000 title claims abstract description 28
- 238000001125 extrusion Methods 0.000 claims abstract description 264
- 238000007789 sealing Methods 0.000 claims abstract description 82
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000002265 prevention Effects 0.000 claims abstract description 15
- 239000013013 elastic material Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 11
- 238000005096 rolling process Methods 0.000 description 15
- 230000007704 transition Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to the technical field of well control equipment, in particular to an auxiliary device for petroleum well workover operation, which comprises a shell, a tubular column and a blowout prevention mechanism, wherein the blowout prevention mechanism comprises a first extrusion ring, a first annular rubber core, a second extrusion ring, a second annular rubber core and a first mounting plate. According to the auxiliary device for petroleum well workover operation, the first extrusion ring, the first annular rubber core, the second extrusion ring, the second annular rubber core and the first mounting plate are arranged to be matched, when blowout occurs, the first extrusion ring and the second extrusion ring are driven to move upwards along with the first mounting plate, the first annular rubber core is extruded outwards through the first extrusion ring, the second annular rubber core is extruded inwards through the second extrusion ring, the first annular rubber core and the second annular rubber core are deformed, the first annular rubber core is sealed with the shell, the second annular rubber core is sealed with the tubular column, liquid can be prevented from being ejected upwards, and the sealing effect is improved.
Description
Technical Field
The invention relates to the technical field of well control equipment, in particular to an auxiliary device for petroleum well workover operation.
Background
Because of many uncertain factors in the stratum and quite complex, blowout is likely to happen in each drilling operation, and once emergency conditions such as overflow, kick, blowout and the like occur in the drilling operation, serious accidents such as blowout and the like can be caused.
The annular blowout preventer is used as an auxiliary device for petroleum well repair operation, is one of the most important well control equipment, and can form a sealed annular space between a pipe column and a shaft during operation through a rubber core arranged inside the annular blowout preventer, so that well sealing can be independently completed under the condition that the pipe column is not arranged in the well, and malignant accidents such as blowout and the like can be effectively prevented. However, the sealing effect of the rubber core of the conventional annular blowout preventer is poor, and when the annular blowout preventer is used, the tubular column is frequently required to be forcibly pulled down, so that the rubber core is severely worn, and the service life of the rubber core is reduced.
Disclosure of Invention
The invention provides an auxiliary device for petroleum well workover operation, which aims to solve the problems that the sealing effect of a rubber core is poor, the rubber core is easy to wear and the service life of the rubber core is shortened when the conventional well workover auxiliary device is used.
The auxiliary device for petroleum well repair operation adopts the following technical scheme: an auxiliary device for petroleum well repair operation comprises a shell, a tubular column and a blowout prevention mechanism, wherein the tubular column can be downwards inserted into the shell from the upper end of the shell; the blowout prevention mechanism comprises a first extrusion ring, a first annular rubber core, a second extrusion ring, a second annular rubber core and a first mounting plate; the first mounting plate is annular, the first mounting plate can be mounted in the shell in a vertical sliding manner, the initial first mounting plate is in contact with the inner bottom wall of the shell, the first extrusion ring and the second extrusion ring are sleeved outside the tubular column and are arranged at the upper end of the first mounting plate, the first extrusion ring and the second extrusion ring can slide along the radial direction of the first mounting plate, and the first extrusion ring is arranged at one side, far away from the tubular column, of the second extrusion ring; the first annular rubber core can be rotatably arranged between the first extrusion ring and the inner side wall of the shell, the initial first annular rubber core is contacted with the inner side wall of the shell, the second annular rubber core can be rotatably arranged between the second extrusion ring and the tubular column, and the initial second annular rubber core is contacted with the tubular column; when blowout occurs, the first mounting plate can move upwards in the shell, so that the first extrusion ring and the second extrusion ring move upwards along with the first mounting plate; the upward movement of the first extrusion ring and the second extrusion ring is provided with a first stage and a second stage, when the first stage is adopted, the first extrusion ring and the second extrusion ring only move upward, the first annular rubber core rolls along the inner wall of the shell, and the second annular rubber core rolls along the pipe column; when the first extruding ring is in the second stage, the first extruding ring can extrude the first annular rubber core outwards, so that the first annular rubber core is limited to roll along the inner wall of the shell, and the first annular rubber core is sealed with the shell; the second extrusion ring can inwards extrude the second annular rubber core, so that the second annular rubber core is limited to roll along the pipe column, and the second annular rubber core is sealed with the pipe column.
Further, the blowout prevention mechanism further comprises a plurality of extrusion columns; the upper ends of the extrusion columns are arranged on the inner top wall of the shell, the lower ends of the extrusion columns are respectively clamped between the first extrusion ring and the second extrusion ring, and the first extrusion ring and the second extrusion ring can move up and down along the extrusion columns; the extrusion post includes sleeve and spacing post, the sleeve sets up along vertical direction, the sleeve upper end links to each other with the roof in the shell, spacing post includes first post section, changeover portion and second post section, first post section is the columnar structure that sets up along vertical direction, link to each other through first elastic component between sleeve lower extreme and the first post section, the changeover portion is big for the upper end, the little toper post of lower extreme, and changeover portion upper end and first post section fixed connection and coaxial, changeover portion lower extreme and second post section fixed connection and coaxial, the changeover portion is fixed to be set up in first post section lower extreme, the second post section is the columnar structure that sets up along vertical direction, the second post section is fixed to be set up in the changeover portion lower extreme, and the diameter of second post section is less than first post section.
Further, the blowout prevention mechanism further comprises a second mounting plate, the second mounting plate is annular, the second mounting plate can be mounted in the shell in a vertical sliding mode, the second mounting plate is arranged above the first mounting plate, the first extrusion ring and the second extrusion ring are arranged between the first mounting plate and the second mounting plate, the first extrusion ring and the second extrusion ring can slide along the radial directions of the first mounting plate and the second mounting plate, the second mounting plate upwards extends to form a second sleeve, and the first column section is sleeved in the second sleeve.
Further, the inner top wall of the shell is connected with the second mounting plate through a pressure spring.
Further, the first extrusion ring comprises a plurality of first extrusion blocks, the first extrusion blocks are arc-shaped blocks, the first extrusion blocks are sequentially connected end to end in the circumferential direction of the first mounting plate, the two ends of each first extrusion block in the circumferential direction of the pipe column are respectively connected with a first sealing plate and a second sealing plate, the first sealing plates and the second sealing plates can stretch into the first extrusion blocks, the first sealing plates are arranged on one side, far away from the pipe column, of each second sealing plate, dislocation is arranged between the first sealing plate of one first extrusion block and the second sealing plate of the other first extrusion block, when the outward moving diameter of the first extrusion ring is increased, the first sealing plates and the second sealing plates are mutually far away, and when the inward moving diameter of the first extrusion ring is reduced, the first sealing plates and the second sealing plates are mutually close; the second extrusion ring includes a plurality of second extrusion pieces, a plurality of second extrusion pieces are the arc piece, a plurality of second extrusion pieces end to end in proper order on the circumferencial direction of first mounting panel, every second extrusion piece is connected with third closing plate and fourth closing plate respectively at the both ends on the circumference of tubular column, third closing plate and fourth closing plate homoenergetic are enough to flexible in the second extrusion piece, and the third closing plate sets up in the one side of keeping away from the tubular column relative fourth closing plate, dislocation set between the third closing plate of every two second extrusion pieces that set up and the fourth closing plate of another second extrusion piece in the two adjacent, when the outside removal diameter of second extrusion ring grow, third closing plate and fourth closing plate keep away from each other, when the inside removal diameter of second extrusion ring diminishes, third closing plate and fourth closing plate are close to each other.
Further, a gap is reserved between the first mounting plate and the shell, so that a first annular space is defined between the first mounting plate and the shell, a first communication space allowing liquid to circulate is defined between each two adjacent first extrusion blocks, the first sealing plate and the first annular rubber core, the first annular space is communicated with the first communication space, and liquid can flow into the first communication space after passing through the first annular space; a gap is reserved between the inner ring of the first mounting plate and the pipe column, so that a second annular space is defined between the inner ring of the first mounting plate and the pipe column, a second circulation space allowing liquid to circulate is defined between every two adjacent second extrusion blocks, the third sealing plate and the second annular rubber core, the second annular space is communicated with the second circulation space, and liquid can flow into the second circulation space after passing through the second annular space.
Further, the first sealing plate is provided with a plugging plate, the plugging plate is made of elastic materials, and the plugging plate is arranged on one side, far away from the pipe column, of the first sealing plate.
Further, the upper end and the lower end of the shell are respectively provided with a first through hole in the same vertical direction, the first through holes are round, the upper end and the lower end of the shell are communicated in the same vertical direction, the first through holes are coaxial with the inner ring of the first mounting plate, the diameter of the inner ring of the first mounting plate is smaller than that of the first through holes, and when blowout occurs, liquid can move from bottom to top to contact with the first mounting plate, so that the first mounting plate moves upwards.
Further, the first annular rubber core and the second annular rubber core are annular and are made of elastic materials.
The beneficial effects of the invention are as follows: according to the auxiliary device for petroleum well workover operation, the first extrusion ring, the first annular rubber core, the second extrusion ring, the second annular rubber core and the first mounting plate are arranged to be matched, in a normal state, the pipe column is inserted into the shell downwards, rolling friction is generated between the pipe column and the second annular rubber core, and when the pipe column is forcibly pulled down, rolling friction is generated between the second annular rubber core and the pipe column, so that friction loss to the second annular rubber core when the pipe column is pulled down and pulled down is reduced, and the service life of the second annular rubber core is prolonged. When blowout happens, the impact of liquid is used as power during blowout, no additional power source is needed for driving, the first mounting plate is driven to move upwards, the first extrusion ring and the second extrusion ring are driven to move upwards along with the first mounting plate, in the second stage of upward movement of the first extrusion ring and the second extrusion ring, the first annular rubber core is extruded outwards through the first extrusion ring, the second annular rubber core is extruded inwards through the second extrusion ring, the first annular rubber core and the second annular rubber core deform, rolling friction between the first annular rubber core and the shell is changed into sliding friction, rolling friction between the second annular rubber core and the tubular column is changed into sliding friction, sealing between the first annular rubber core and the shell is achieved, sealing between the second annular rubber core and the tubular column is achieved, liquid can be prevented from being ejected upwards, and sealing effect is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of an embodiment of an auxiliary device for petroleum workover operation of the present invention;
FIG. 2 is a cross-sectional view of the overall structure of an embodiment of an auxiliary device for petroleum workover operations of the present invention (in a first stage);
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is a schematic view showing the internal structure of an embodiment of an auxiliary device for petroleum workover treatment according to the present invention;
FIG. 5 is a schematic view of the internal structure of an embodiment of an auxiliary device for petroleum workover operations of the present invention (with the second mounting plate removed);
FIG. 6 is a schematic view of a first extrusion block of an embodiment of an auxiliary device for petroleum workover operations of the present invention;
FIG. 7 is a schematic view of a second extrusion block of an embodiment of an auxiliary device for petroleum workover operations of the present invention;
FIG. 8 is a cross-sectional view of the overall structure of an embodiment of an auxiliary device for petroleum workover operations of the present invention (in a second stage);
FIG. 9 is an enlarged view at B in FIG. 8;
fig. 10 is a schematic structural view of a plugging plate of an embodiment of an auxiliary device for petroleum workover treatment of the present invention.
In the figure: 100. a tubular column; 200. a blowout prevention mechanism; 220. a pressure spring; 230. an extrusion column; 231. a first column section; 232. a second column section; 233. a transition section; 240. a first annular rubber core; 250. the second annular rubber core; 260. a first extrusion ring; 261. a first loop; 262. a first sealing plate; 263. a second sealing plate; 264. a first connection block; 265. a first ejector rod; 266. a plugging plate; 270. a second extrusion ring; 271. a second loop; 272. a third sealing plate; 273. a fourth sealing plate; 274. a second connection block; 275. a second ejector rod; 280. a first mounting plate; 290. and a second mounting plate.
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.
An embodiment of an auxiliary device for petroleum workover operations of the present invention is shown in fig. 1 to 10.
The utility model provides an auxiliary device of oil workover operation, includes shell, tubular column 100 and blowout prevention mechanism 200, and first opening has all been seted up at same vertical direction at the upper and lower both ends of shell, and first opening is circular, makes the upper and lower both ends of shell communicate in same vertical direction, and the first opening of shell lower extreme downwardly extending forms first sleeve pipe, and first sleeve pipe lower extreme is installed in the well head. The pipe column 100 is arranged in the vertical direction, and the pipe column 100 can be inserted into the casing from the first through hole at the upper end of the casing downwards through the first through hole at the lower end of the casing and extend into the wellhead after passing through the first casing.
The blowout prevention mechanism 200 is mounted in the housing, and the blowout prevention mechanism 200 includes a first extrusion ring 260, a first annular rubber core 240, a second extrusion ring 270, a second annular rubber core 250, and a first mounting plate 280.
The first mounting plate 280 is annular, and the first mounting plate 280 can be installed in the shell in a vertical sliding manner, specifically, is provided with the arch on the periphery wall of the first mounting plate 280, and the arch is provided with the recess along vertical direction on the periphery wall in the shell, and the recess sets up along vertical direction, protruding slidable mounting in the recess. Initial first mounting plate 280 is in contact with the inner bottom wall of the housing.
Specifically, the first through hole is coaxial with the inner ring of the first mounting plate 280, and the diameter of the inner ring of the first mounting plate 280 is smaller than that of the first through hole, so that when blowout occurs, liquid passes upward through the first through hole at the lower end of the casing through the first sleeve and enters the lower side of the first mounting plate 280 to contact with the first mounting plate 280, and the first mounting plate 280 moves upwards.
The first extrusion ring 260 and the second extrusion ring 270 are sleeved outside the pipe column 100 and are arranged at the upper end of the first mounting plate 280, the first extrusion ring 260 and the second extrusion ring 270 can slide along the radial direction of the first mounting plate 280, and the first extrusion ring 260 is arranged at one side, far away from the pipe column 100, of the second extrusion ring 270.
The first annular rubber core 240 can be rotatably installed between the first extrusion ring 260 and the inner side wall of the housing, the initial first annular rubber core 240 is in contact with the inner side wall of the housing, the second annular rubber core 250 can be rotatably installed between the second extrusion ring 270 and the tubular column 100, and the initial second annular rubber core 250 is in contact with the tubular column 100. Specifically, a first annular channel 261 coaxial with the first extrusion ring 260 is provided at the outer end of the first extrusion ring 260, and the first annular rubber core 240 is rotatably mounted on the first annular channel 261. The second extrusion ring 270 is provided at an outer end thereof with a second annular channel 271 coaxial with the second extrusion ring 270, and the second annular rubber core 250 is rotatably mounted on the second annular channel 271.
The first annular rubber core 240 and the second annular rubber core 250 are annular and are made of elastic materials. Specifically, the first annular rubber core 240 and the second annular rubber core 250 may be rubber rings. Further, the first annular rubber core 240 and the second annular rubber core 250 are annular structures with hollow interiors, and the interiors are filled with liquid, such as hydraulic oil, and the like.
In the event of a blowout, first mounting plate 280 may be able to move upward within the housing, thereby causing first and second compression rings 260, 270 to move upward with first mounting plate 280. The upward movement of the first and second extrusion rings 260, 270 has a first stage in which the first and second extrusion rings 260, 270 move only upward and the first annular rubber core 240 rolls along the inner wall of the housing and the second annular rubber core 250 rolls along the tubular string 100; in the second stage, the first extrusion ring 260 can extrude the first annular rubber core 240 outwards, so as to limit the first annular rubber core 240 to roll along the inner wall of the casing, change rolling friction between the first annular rubber core 240 and the casing into sliding friction, change rolling friction between the second annular rubber core 250 and the tubular column 100 into sliding friction, and seal the first annular rubber core 240 and the casing; the second extrusion ring 270 can extrude the second annular rubber core 250 inward, thereby limiting the second annular rubber core 250 from rolling along the pipe string 100 and sealing between the second annular rubber core 250 and the pipe string 100.
In this embodiment, by setting the first extrusion ring 260, the first annular rubber core 240, the second extrusion ring 270, the second annular rubber core 250 and the first mounting plate 280, in a normal state, the pipe column 100 is inserted into the housing downwards, rolling friction will occur between the second annular rubber core 250 and the second annular rubber core 250, and also when the pipe column 100 is forcibly pulled down, rolling friction is also between the second annular rubber core 250 and the pipe column 100, so that friction loss to the second annular rubber core 250 when the pipe column 100 is pulled down and the pipe column 100 is pulled down is reduced, and the service life of the second annular rubber core 250 is prolonged. When blowout happens, the impact of liquid during blowout is used as power, no additional power source is needed for driving, the first mounting plate 280 is driven to move upwards, the first extrusion ring 260 and the second extrusion ring 270 are driven to move upwards along with the first mounting plate 280, in the second stage of upward movement of the first extrusion ring 260 and the second extrusion ring 270, the first annular rubber core 240 is extruded outwards through the first extrusion ring 260, the second annular rubber core 250 is extruded inwards through the second extrusion ring 270, the first annular rubber core 240 and the second annular rubber core 250 are deformed, rolling friction between the first annular rubber core 240 and the outer shell is changed into sliding friction, rolling friction between the second annular rubber core 250 and the tubular column 100 is changed into sliding friction, the first annular rubber core 240 and the inner wall of the outer shell are sealed, the second annular rubber core 250 and the tubular column 100 are sealed, the upward liquid ejection can be prevented, and the sealing effect is improved.
In this embodiment, the blowout prevention mechanism 200 further includes a plurality of extrusion columns 230; the upper ends of the extrusion columns 230 are mounted on the inner top wall of the housing, the lower ends of the extrusion columns 230 are respectively clamped between the first extrusion ring 260 and the second extrusion ring 270, the extrusion columns 230 can stretch and retract, and the first extrusion ring 260 and the second extrusion ring 270 can move up and down along the extrusion columns 230. Specifically, the inner ring of the first extrusion ring 260 is provided with a plurality of first ejector rods 265, the plurality of first ejector rods 265 are uniformly distributed in the circumferential direction of the first extrusion ring 260, the outer ring of the second extrusion ring 270 is provided with a plurality of second ejector rods 275, the plurality of second ejector rods 275 are uniformly distributed in the circumferential direction of the second extrusion ring 270, each first ejector rod 265 and one second ejector rod 275 are correspondingly arranged in the same radial direction of the pipe column 100, a clamping space capable of clamping the extrusion column 230 is defined between each first ejector rod 265 and the corresponding second ejector rod 275, and the lower end of the initial extrusion column 230 is clamped in the clamping space. In the event of a blowout, upward movement of first mounting plate 280 will cause first extrusion ring 260 and second extrusion ring 270 to move upward along extrusion column 230.
The extrusion column 230 comprises a sleeve and a limit column, the sleeve is arranged along the vertical direction, the upper end of the sleeve is connected with the inner top wall of the shell, the lower end of the sleeve is connected with the limit column through a first elastic piece, and the first elastic piece is a first spring. The limiting column comprises a first column section 231, a transition section 233 and a second column section 232, wherein the first column section 231 is of a column structure arranged along the vertical direction, the lower end of the sleeve is connected with the first column section 231 through a first spring, the transition section 233 is of a conical column with a large upper end and a small lower end, the upper end of the transition section 233 is fixedly connected with and coaxial with the first column section 231, and the lower end of the transition section 233 is fixedly connected with and coaxial with the second column section 232. The second column section 232 is a column structure disposed along a vertical direction, and the diameter of the second column section 232 is smaller than that of the first column section 231.
When blowout occurs, the upward movement of the first mounting plate 280 will cause the first and second extrusion rings 260, 270 to move upward along the extrusion column 230, during which the first and second extrusion rings 260, 270 move upward along the second column section 232, at which time the first and second extrusion rings 260, 270 move upward only, and the first annular rubber core 240 rolls along the inner wall of the housing, and the second annular rubber core 250 rolls along the tubular column 100, at which time in the first stage of upward movement of the first and second extrusion rings 260, 270. In the process that the first extrusion ring 260 and the second extrusion ring 270 go upward from the second column section 232 to the transition section 233 and along the transition section 233 to the first column section 231, at this time, since the diameter of the second column section 232 is smaller than that of the first column section 231, the first extrusion ring 260 will extrude the first annular rubber core 240 outwards, so as to deform the first annular rubber core 240, thereby restricting the first annular rubber core 240 from rolling along the inner wall of the casing, the second extrusion ring 270 will extrude the second annular rubber core 250 inwards, so as to deform the second annular rubber core 250, thereby restricting the second annular rubber core 250 from rolling along the tubular column 100, so as to seal between the second annular rubber core 250 and the tubular column 100, and at this time, in the second stage of upward movement of the first extrusion ring 260 and the second extrusion ring 270, namely in the second stage of upward movement of the first extrusion ring 260 and the second extrusion ring 270, by sealing between the first annular rubber core 240 and the inner wall of the casing, and between the second annular rubber core 250 and the tubular column 100, liquid can be prevented from being ejected upwards.
In this embodiment, the blowout prevention mechanism 200 further includes a second mounting plate 290, the second mounting plate 290 is annular, the second mounting plate 290 can be installed in the housing in a vertically sliding manner, the second mounting plate 290 is disposed above the first mounting plate 280, the first extrusion ring 260 and the second extrusion ring 270 are both disposed between the first mounting plate 280 and the second mounting plate 290, the first extrusion ring 260 and the second extrusion ring 270 can slide along the radial direction of the first mounting plate 280 and the second mounting plate 290, the second mounting plate 290 upwards extends to form a second sleeve, the first column section 231 is sleeved in the second sleeve, and limits the limiting column, so as to ensure the vertical movement of the limiting column.
Specifically, the first mounting plate 280 is provided with a plurality of first sliding grooves, the first sliding grooves are arranged along the radial direction of the first mounting plate 280, the second mounting plate 290 is provided with a plurality of second sliding grooves, and the second sliding grooves are arranged along the radial direction of the second mounting plate 290. The upper and lower both ends of first extrusion ring 260 are all fixed to be provided with a plurality of first connecting blocks 264, and the first connecting block 264 slidable mounting of first extrusion ring 260 lower extreme is in first spout, and the first connecting block 264 slidable mounting of first extrusion ring 260 upper end is in the second spout, and the upper and lower both ends of second extrusion ring 270 are all fixed to be provided with a plurality of second connecting blocks 274, and the second connecting block 274 slidable mounting of second extrusion ring 270 lower extreme is in first spout, and the second connecting block 274 slidable mounting of second extrusion ring 270 upper end is in the second spout.
In this embodiment, the first extrusion ring 260 includes a plurality of first extrusion blocks, each of the plurality of first extrusion blocks is an arc block, the plurality of first extrusion blocks are sequentially connected end to end in the circumferential direction of the first mounting plate 280, each of the first extrusion blocks is connected with a first sealing plate 262 and a second sealing plate 263 respectively at two ends of the circumferential direction of the pipe column 100, each of the first sealing plate 262 and the second sealing plate 263 can extend and retract into the first extrusion block, the first sealing plate 262 is disposed at one side of the second sealing plate 263 far away from the pipe column 100, the first sealing plate 262 of each of the two adjacent first extrusion blocks and the second sealing plate 263 of the other first extrusion block are disposed in a staggered manner, when the diameter of the first extrusion ring 260 is increased, the first sealing plate 262 and the second sealing plate 263 are separated from each other, and when the diameter of the first extrusion ring 260 is reduced, that is, the first sealing plates 262 and the second sealing plates 263 are close to each other, that is always capable of ensuring a sealing state between the two adjacent first extrusion blocks when the diameter of the first extrusion ring 260 is changed.
Specifically, the first extrusion piece has seted up first flexible groove and the flexible groove of second respectively at both ends, and first flexible groove and the flexible groove of second all set up along first extrusion piece circumference direction, link to each other through the second spring between first closing plate 262 and the first flexible groove, link to each other through the third spring between second closing plate 263 and the flexible groove of second, make first closing plate 262 and the flexible of second closing plate 263 homoenergetic to first extrusion piece in. The first second spring and the third spring are both in original length.
A gap is left between first mounting plate 280 and the housing such that a first annular space is defined between first mounting plate 280 and the housing, and after first mounting plate 280 is moved upward, liquid will move upward simultaneously through the first annular space between first mounting plate 280 and the housing. A first flow space allowing liquid to flow is defined between each two adjacent first extrusion blocks and the first sealing plate 262 and the first annular rubber core 240, and the first annular space is communicated with the first flow space, so that the liquid can flow into the first flow space after passing through the first annular space, namely, in the first stage of upward movement of the first extrusion blocks 260 and the second extrusion blocks 270, the liquid enters the first flow space to lubricate the first annular rubber core 240.
The first sealing plate 262 is provided with the plugging plate 266, the plugging plate 266 is made of elastic materials, rubber is specifically selected, the plugging plate 266 is arranged on one side, far away from the pipe column 100, of the first sealing plate 262, in the second stage of upward movement of the first extrusion ring 260 and the second extrusion ring 270, when the first extrusion ring 260 extrudes the first annular rubber core 240 outwards, the diameter of the first extrusion ring 260 is enlarged, at the moment, the first sealing plate 262 and the second sealing plate 263 are far away from each other, in order to avoid the enlargement of the first circulation space, by arranging the plugging plate 266, when the first extrusion ring 260 extrudes the first annular rubber core 240 outwards, the plugging plate 266 is synchronously close to the first annular rubber core 240, so that the plugging plate 266 contacts the first annular rubber core 240, the first circulation space is closed, liquid can not enter any more, and the sealing effect is ensured.
The second extrusion ring 270 includes a plurality of second extrusion pieces, a plurality of second extrusion pieces are arc piece, a plurality of second extrusion pieces are end to end in proper order on the circumferencial direction of first mounting panel 280, every second extrusion piece is connected with third closing plate 272 and fourth closing plate 273 respectively at the ascending both ends in circumference of tubular column 100, third closing plate 272 and fourth closing plate 273 all can stretch out and draw back in the second extrusion piece, and third closing plate 272 sets up in the one side of keeping away from tubular column 100 relative fourth closing plate 273, dislocation set between the third closing plate 272 of every two second extrusion pieces of two adjacent settings and the fourth closing plate of another second extrusion piece, when second extrusion ring 270 outside removal diameter grow, third closing plate 272 and fourth closing plate 273 keep away from each other, when second extrusion ring 270 inside removal diameter diminish, third closing plate 272 and fourth closing plate 273 are close to each other, promptly when the diameter of second extrusion ring 270 changes, can guarantee the sealed state between two adjacent second extrusion pieces all the time.
Specifically, the third expansion groove and the fourth expansion groove are respectively formed in two ends of the second extrusion block, the third expansion groove and the fourth expansion groove are all formed in the circumferential direction of the second extrusion block, the third sealing plate 272 is connected with the third expansion groove through the fourth spring, the fourth sealing plate 273 is connected with the fourth expansion groove through the fifth spring, and the third sealing plate 272 and the fourth sealing plate 273 can stretch into the second extrusion block. The original fourth spring and the fifth spring are all in original length.
A gap is left between the inner ring of the first mounting plate 280 and the pipe string 100, so that a second annular space is defined between the inner ring of the first mounting plate 280 and the pipe string 100, and when blowout occurs, liquid contacts the first mounting plate 280 from bottom to top, so that the first mounting plate 280 moves upwards, and meanwhile, the liquid synchronously flows into the second annular space defined between the inner ring of the first mounting plate 280 and the pipe string 100. A second circulation space allowing liquid to circulate is defined between each two adjacent second extrusion blocks and the third sealing plate 272 and the second annular rubber core 250, and the second annular space is communicated with the second circulation space, so that the liquid can flow into the second circulation space after passing through the second annular space, namely, in the first stage of upward movement of the first extrusion ring 260 and the second extrusion ring 270, the liquid enters the second circulation space to lubricate the second annular rubber core 250.
In the second stage of upward movement of the first extrusion ring 260 and the second extrusion ring 270, when the second extrusion ring 270 can extrude the second annular rubber core 250 inward, the diameter of the second extrusion ring 270 becomes smaller, at this time, the third sealing plate 272 and the fourth sealing plate 273 are close to each other, and two adjacent second extrusion blocks contact, so that the second circulation space is closed, no liquid is introduced, and the sealing effect is ensured.
That is, in the present embodiment, by providing the first sealing plate 262, the second sealing plate 263, the third sealing plate 272 and the fourth sealing plate 273 to cooperate with each other, in the first stage of upward movement of the first pressing ring 260 and the second pressing ring 270, liquid will enter the first circulation space and the second exit space to lubricate the first annular rubber core 240 and the second annular rubber core 250. In the second stage of upward movement of the first and second pressing rings 260 and 270, the first and second circulation spaces are closed, and no liquid is introduced, ensuring a sealing effect.
In this embodiment, the inner top wall of the housing is connected to the second mounting plate 290 through the pressure spring 220, and when blowout occurs, the first mounting plate 280 moves upward to transmit the impact force to the pressure spring 220, squeeze the pressure spring 220, and buffer the impact force through the pressure spring 220, so as to ensure the stable use of the device.
In this embodiment, an auxiliary device for petroleum well repair operation further includes a control system, a sensor is installed on the first mounting board 280, the sensor may specifically be a pressure sensor or a displacement sensor, the sensor is electrically connected to the control system, when blowout occurs, the first mounting board 280 will be prompted to move upwards, and then an induction signal is sent through the sensor, and the induction signal is transmitted to the control system, the control system will send an alarm to alert a worker, and the lowering of the tubular column 100 is prohibited.
By combining the above embodiments, the specific working principle and working process are as follows: in use, if the control system does not raise an alarm indicating that a blowout is not occurring at this time, then the string 100 may be lowered, and if the control system raises an alarm indicating that liquid is driving the first mounting plate 280 upward, then the string 100 is inhibited from being lowered.
In a normal state where no blowout has occurred, the tubular string 100 is lowered, and the downward movement of the tubular string 100 will cause the second annular rubber core 250 to roll, so that the friction loss for the second annular rubber core 250 is reduced, and the tubular string 100 can be safely inserted into the housing from the upper end of the housing downward and extend into the wellhead.
When a blowout occurs, the liquid will drive the first mounting plate 280 to move upward, the upward movement of the first mounting plate 280 will cause the first and second extrusion rings 260, 270 to move upward along the extrusion column 230, while the upward movement of the first mounting plate 280, the liquid will move upward through the first annular space between the first mounting plate 280 and the housing and continue to move upward into the first flow space, the first annular rubber core 240 will be lubricated during the first stage of the upward movement of the first and second extrusion rings 260, 270, and at the same time the liquid will flow into the second annular space defined between the inner ring of the first mounting plate 280 and the tubular string 100 and move upward from the second annular space into the second flow space, and during the first stage of the upward movement of the first and second extrusion rings 260, 270, the liquid will enter the second flow space and lubricate the second annular rubber core 250.
With the continuous upward movement of the first extrusion ring 260 and the second extrusion ring 270 along the extrusion column 230, in the second stage of upward movement of the first extrusion ring 260 and the second extrusion ring 270, that is, in the process of going upward from the second column section 232 to the transition section 233 and along the transition section 233 to the first column section 231, the first annular rubber core 240 is extruded outward by the first extrusion ring 260, the second annular rubber core 250 is extruded inward by the second extrusion ring 270, so that the first annular rubber core 240 and the second annular rubber core 250 deform, the first annular rubber core 240 is sealed with the casing, and the second annular rubber core 250 is sealed with the column 100, so that upward ejection of liquid can be prevented, and the sealing effect is improved. And when first extrusion ring 260 extrudes first annular rubber core 240 outwards, the diameter of first extrusion ring 260 grow, and first closing plate 262 and second closing plate 263 keep away from each other this moment, in order to avoid first circulation space grow, through setting up shutoff board 266, when first extrusion ring 260 extrudes first annular rubber core 240 outwards, shutoff board 266 will be synchronous to first annular rubber core 240 be close to, make shutoff board 266 and first annular rubber core 240 contact, and then make first circulation space seal, no longer can get into liquid, guarantee sealed effect. When the second extrusion ring 270 extrudes the second annular rubber core 250 inwards, the diameter of the second extrusion ring 270 is reduced, at this time, the third sealing plate 272 and the fourth sealing plate 273 are close to each other, and the two adjacent second extrusion blocks contact, so that the second circulation space is closed, no liquid is introduced, and the sealing effect is ensured. Due to the action of the liquid entering the first flowing space and the second flowing space before, the first annular rubber core 240 and the second annular rubber core 250 deform, so that rolling friction between the first annular rubber core 240 and the outer shell is changed into sliding friction, and after the rolling friction between the second annular rubber core 250 and the tubular column 100 is changed into sliding friction, the liquid continuously lubricates the first annular rubber core 240 and the second annular rubber core 250, and friction loss of the first annular rubber core 240 and the second annular rubber core 250 due to deformation is reduced.
And in the process that the first mounting plate 280 drives the first extrusion ring 260 and the second extrusion ring 270 to move upwards, the impact force is buffered by the extrusion pressure spring 220, and meanwhile, after the first extrusion ring 260 and the second extrusion ring 270 are lifted until the lower end face of the extrusion column 230 contacts with the upper end face of the first mounting plate 280, the first extrusion ring 260 and the second extrusion ring 270 move upwards again to compress the first spring, and after blowout is relieved, the device moves downwards to reset under the action of the pressure spring 220 and the first spring.
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 (9)
1. An auxiliary device of oil workover operation, its characterized in that: the anti-blowout device comprises a shell, a tubular column and an anti-blowout mechanism, wherein the tubular column can be downwards inserted into the shell from the upper end of the shell; the blowout prevention mechanism comprises a first extrusion ring, a first annular rubber core, a second extrusion ring, a second annular rubber core and a first mounting plate; the first mounting plate is annular, the first mounting plate can be mounted in the shell in a vertical sliding manner, the initial first mounting plate is in contact with the inner bottom wall of the shell, the first extrusion ring and the second extrusion ring are sleeved outside the tubular column and are arranged at the upper end of the first mounting plate, the first extrusion ring and the second extrusion ring can slide along the radial direction of the first mounting plate, and the first extrusion ring is arranged at one side, far away from the tubular column, of the second extrusion ring; the first annular rubber core can be rotatably arranged between the first extrusion ring and the inner side wall of the shell, the initial first annular rubber core is contacted with the inner side wall of the shell, the second annular rubber core can be rotatably arranged between the second extrusion ring and the tubular column, and the initial second annular rubber core is contacted with the tubular column; when blowout occurs, the first mounting plate can move upwards in the shell, so that the first extrusion ring and the second extrusion ring move upwards along with the first mounting plate;
the upward movement of the first extrusion ring and the second extrusion ring is provided with a first stage and a second stage, when the first stage is adopted, the first extrusion ring and the second extrusion ring only move upward, the first annular rubber core rolls along the inner wall of the shell, and the second annular rubber core rolls along the pipe column; when the first extruding ring is in the second stage, the first extruding ring can extrude the first annular rubber core outwards, so that the first annular rubber core is limited to roll along the inner wall of the shell, and the first annular rubber core is sealed with the shell; the second extrusion ring can inwards extrude the second annular rubber core, so that the second annular rubber core is limited to roll along the pipe column, and the second annular rubber core is sealed with the pipe column.
2. An auxiliary device for petroleum well servicing according to claim 1, wherein: the blowout prevention mechanism further comprises a plurality of extrusion columns; the upper ends of the extrusion columns are arranged on the inner top wall of the shell, the lower ends of the extrusion columns are respectively clamped between the first extrusion ring and the second extrusion ring, and the first extrusion ring and the second extrusion ring can move up and down along the extrusion columns; the extrusion post includes sleeve and spacing post, the sleeve sets up along vertical direction, the sleeve upper end links to each other with the roof in the shell, spacing post includes first post section, changeover portion and second post section, first post section is the columnar structure that sets up along vertical direction, link to each other through first elastic component between sleeve lower extreme and the first post section, the changeover portion is big for the upper end, the little toper post of lower extreme, and changeover portion upper end and first post section fixed connection and coaxial, changeover portion lower extreme and second post section fixed connection and coaxial, the changeover portion is fixed to be set up in first post section lower extreme, the second post section is the columnar structure that sets up along vertical direction, the second post section is fixed to be set up in the changeover portion lower extreme, and the diameter of second post section is less than first post section.
3. An auxiliary device for petroleum well servicing according to claim 2, wherein: the blowout prevention mechanism further comprises a second mounting plate, the second mounting plate is annular, the second mounting plate can be mounted in the shell in a vertically sliding mode, the second mounting plate is arranged above the first mounting plate, the first extrusion ring and the second extrusion ring are arranged between the first mounting plate and the second mounting plate, the first extrusion ring and the second extrusion ring can slide along the radial directions of the first mounting plate and the second mounting plate, the second mounting plate is upwards extended to form a second sleeve, and the first column section is sleeved in the second sleeve.
4. An auxiliary device for petroleum well servicing according to claim 3, wherein: the inner top wall of the shell is connected with the second mounting plate through a pressure spring.
5. An auxiliary device for petroleum well servicing according to claim 1, wherein: the first extrusion ring comprises a plurality of first extrusion blocks, the first extrusion blocks are arc-shaped blocks, the first extrusion blocks are sequentially connected end to end in the circumferential direction of the first mounting plate, the two ends of each first extrusion block in the circumferential direction of the pipe column are respectively connected with a first sealing plate and a second sealing plate, the first sealing plates and the second sealing plates can stretch inwards of the first extrusion blocks, the first sealing plates are arranged on one side, far away from the pipe column, of each second sealing plate, dislocation is arranged between the first sealing plate of one first extrusion block and the second sealing plate of the other first extrusion block, when the outward moving diameter of the first extrusion ring is increased, the first sealing plates and the second sealing plates are mutually far away, and when the inward moving diameter of the first extrusion ring is reduced, the first sealing plates and the second sealing plates are mutually close; the second extrusion ring includes a plurality of second extrusion pieces, a plurality of second extrusion pieces are the arc piece, a plurality of second extrusion pieces end to end in proper order on the circumferencial direction of first mounting panel, every second extrusion piece is connected with third closing plate and fourth closing plate respectively at the both ends on the circumference of tubular column, third closing plate and fourth closing plate homoenergetic are enough to flexible in the second extrusion piece, and the third closing plate sets up in the one side of keeping away from the tubular column relative fourth closing plate, dislocation set between the third closing plate of every two second extrusion pieces that set up and the fourth closing plate of another second extrusion piece in the two adjacent, when the outside removal diameter of second extrusion ring grow, third closing plate and fourth closing plate keep away from each other, when the inside removal diameter of second extrusion ring diminishes, third closing plate and fourth closing plate are close to each other.
6. An auxiliary device for petroleum well servicing operations according to claim 5, wherein: a gap is reserved between the first mounting plate and the shell, so that a first annular space is defined between the first mounting plate and the shell, a first flowing space allowing liquid to flow is defined between every two adjacent first extrusion blocks, the first sealing plate and the first annular rubber core, the first annular space is communicated with the first flowing space, and liquid can flow into the first flowing space after passing through the first annular space; a gap is reserved between the inner ring of the first mounting plate and the pipe column, so that a second annular space is defined between the inner ring of the first mounting plate and the pipe column, a second circulation space allowing liquid to circulate is defined between every two adjacent second extrusion blocks, the third sealing plate and the second annular rubber core, the second annular space is communicated with the second circulation space, and liquid can flow into the second circulation space after passing through the second annular space.
7. An auxiliary device for petroleum well servicing operations according to claim 6, wherein: the first sealing plate is provided with a plugging plate which is made of elastic materials and is arranged on one side, far away from the pipe column, of the first sealing plate.
8. An auxiliary device for petroleum well servicing operations according to claim 6, wherein: the upper and lower both ends of shell all have seted up first through-hole in same vertical direction, and first through-hole is circular, makes the upper and lower both ends of shell communicate in same vertical direction, and first through-hole is coaxial with the inner circle of first mounting panel, and the diameter of the inner circle of first mounting panel is less than first through-hole, when taking place the blowout, liquid from lower supreme removal can be with first mounting panel contact, makes first mounting panel upward movement.
9. An auxiliary device for petroleum well servicing according to claim 1, wherein: the first annular rubber core and the second annular rubber core are annular and are made of elastic materials.
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| CN202310579470.7A CN116335575B (en) | 2023-05-23 | 2023-05-23 | Auxiliary device for petroleum well repairing operation |
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| CN202310579470.7A CN116335575B (en) | 2023-05-23 | 2023-05-23 | Auxiliary device for petroleum well repairing operation |
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