CN115306342B - Glue injection guiding sealing blowout preventer - Google Patents
Glue injection guiding sealing blowout preventer Download PDFInfo
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- CN115306342B CN115306342B CN202211237219.4A CN202211237219A CN115306342B CN 115306342 B CN115306342 B CN 115306342B CN 202211237219 A CN202211237219 A CN 202211237219A CN 115306342 B CN115306342 B CN 115306342B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—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
Abstract
The invention relates to the technical field of wellhead sealing in the oil extraction process, in particular to a glue injection guide sealing blowout preventer, which comprises a guide sealing core, an upper sealing base, a lower sealing base and a vertically arranged central cylinder. According to the glue injection guide sealing blowout preventer, after the pressurized colloid is injected into the space formed by the upper sealing base, the lower sealing base, the inner side of the central cylinder and the guide sealing core, the pressurized colloid pushes the front sealing core and the rear sealing core to approach each other under the action of the front guide member and the rear guide member, so that the front sealing core and the rear sealing core contact the outer side of the rear sealing polished rod, the reliability and operability of well head polished rod sealing are improved, quick sealing, quick unsealing and flexible opening and closing are realized, the difficult problem of well head sealing of various oil wells is solved, the well head blowout preventing capability of the thermal recovery thickened oil well is improved, the glue injection guide sealing blowout preventer is suitable for sealing the thermal recovery thickened oil well heads under various working conditions, and the safety and the high efficiency in well head packing replacing operation are improved.
Description
Technical Field
The invention relates to the technical field of wellhead sealing in an oil extraction process, in particular to a glue injection guide sealing blowout preventer.
Background
In daily production operation of an oil field, the well mouth of the oil well is required to be kept in a sealing state to ensure safe production and avoid environmental pollution caused by running, overflowing, stabbing and leaking. In the mechanical oil extraction process, when a steel wire rope of a polished rod of the pumping unit reciprocates up and down on the polished rod, the polished rod has large load change and uncertain motion trail, the friction between the polished rod and the packing is uncertain, and the probability of eccentric wear of the wellhead sealing packing is high due to the influence of other factors, so that the defects of wellhead sealing failure, wellhead oil leakage and environmental pollution are caused, the puncture and leakage of the packing root needs to be found in time on site, and the wellhead sealing is recovered in time to prevent the situation expansion of the oil leakage, the oil leakage and the environmental pollution of the packing.
The exploitation of the thick oil is generally carried out by adopting a steam injection thermal exploitation mode, and a wellhead glue injection guiding sealing blowout preventer used in the exploitation process bears high temperature and high pressure during working. Once failure and leakage occur in the steam injection process, the treatment is very difficult, serious economic loss is easily caused, and the environment is polluted. The packing inferior level of dual-purpose packing of notes adopting that current viscous crude well head used is mostly material such as graphite, rubber, easily takes place wearing and tearing, causes the sealed not tight phenomenon of frequent emergence closure of inferior level, influences higher level packing change work, causes serious interference for production, has the accident potential. Therefore, there is a need for a well head sealing gate suitable for various working conditions, which can timely seal a polish rod, prevent the well head from being punctured, and improve and ensure the safety and reliability of operations such as replacing packing at the well head.
In a patent document with publication number CN103233697B and name of an oil well wellhead blowout preventer, a cap-shaped structure passively blocks well fluid jetted during blowout on the inner wall of the blowout preventer, and the well fluid flows back to an oil jacket annular space along the inner wall, so that large-area pollution is not caused during blowout, but the application range is small, and the high-pressure resistant effect is poor; in patent application with publication number CN107178333A, named a polish rod sealer, it realizes hydraulic sealing, angular displacement and horizontal displacement and blowout prevention and integrated design, and is convenient for adjustment and operation. The packing is relieved from eccentric wear, the load of the pumping unit is reduced, electric energy is saved, the packing sealing effect is good, the packing is particularly suitable for steam injection of thick oil and well mouth sealing of a pumping well in an injection accumulation area, crude oil loss is avoided, the environment is prevented from being polluted, the oil field management level is improved, and the packing sealing device has the defect that the sealing cannot be timely recovered after the sealing of a polished rod of the oil well fails.
Disclosure of Invention
The invention provides a glue injection guide sealing blowout preventer, which overcomes the defects of the prior art and can effectively solve the problems of well mouth sealing failure in the existing oil well measure operation (such as steam injection and liquid extrusion) and oil extraction process, well mouth blowout prevention after polished rod sealing failure of a pumping well and timely sealing recovery.
The technical scheme of the invention is realized by the following measures: the utility model provides a injecting glue direction seals blowout preventer, including the sealed core of direction, go up the sealed basement, the central section of thick bamboo of sealed basement and vertical setting down, the inboard coaxial cover in central section of thick bamboo middle part is equipped with the sealed core of direction, the sealed core of direction can seal the preceding sealed core and the back sealed core that wear to locate the interior polished rod outside of central section of thick bamboo after being close to each other and contacting, preceding sealed core and back sealed core are semicircular ring structure and are central symmetry setting, preceding sealed core left part trailing flank is from supreme inclined plane from preceding to hypsokinesis down, preceding sealed core right part trailing flank is central symmetry setting with preceding sealed core left part trailing flank, the inboard sealed fixed mounting together with the annular last sealed basement of circle of center section of thick bamboo upper portion that corresponds preceding sealed core upper end position, the inboard sealed fixed mounting together of center section of thick bamboo lower part that corresponds preceding sealed core lower extreme position is in the lower part of circle shape, the anterior inboard fixed mounting of center section of thick bamboo has preceding direction baffle, the inboard fixed mounting of center section of thick bamboo rear portion has the back direction baffle that is central symmetry setting with preceding direction baffle.
The following is further optimization or/and improvement of the technical scheme of the invention:
preferably, the central cylinder comprises a front connecting cylinder and a rear connecting cylinder which are symmetrically arranged in front and rear, front connecting plates are fixed on the left and right sides of the rear end of the front connecting cylinder, rear connecting plates are fixed on the left and right sides of the front end of the rear connecting cylinder, a plurality of first connecting through holes are distributed on the front side of each front connecting plate at intervals from top to bottom, a second connecting through hole is arranged on the front side of the rear connecting plate corresponding to each first connecting through hole, the front connecting cylinder and the rear connecting cylinder sequentially penetrate through the first connecting through holes and the second connecting through holes corresponding to the first connecting through holes through screw ends and then are fixedly installed together through connecting screws screwed with nuts, the lower sealing substrate comprises a front half sealing substrate and a rear half sealing substrate which are arranged in half-and half, the front half sealing substrate is fixedly installed on the inner side of the lower portion of the front connecting cylinder, the rear half sealing substrate is fixedly installed on the inner side of the lower portion of the rear connecting cylinder, handle holes which are radially penetrating through are arranged on the front side of the middle portion of the front connecting cylinder and the rear side of the rear connecting cylinder corresponding to the lower portion of the front half sealing substrate, and at least one handle which is radially arranged in a circumferential interval.
Preferably, an upper flange is fixed to an outer side of an upper portion of the central cylinder, a lower flange is fixed to an outer side of a lower portion of the central cylinder, and connection holes of the upper flange and connection holes of the lower flange are in one-to-one correspondence.
Preferably, the lower end of the central cylinder is fixedly provided with a mounting flange, the center of the upper end of the upper sealing substrate is fixedly provided with an inner cavity cylinder, the inner cavity cylinder is of a cylindrical structure with an upper opening and a lower end being closed, the center of the lower end of the inner cavity cylinder is provided with a first polish rod hole, the outer side of the upper end of the inner cavity cylinder is in threaded connection with a gland in a sealing manner, the outer side of the gland is uniformly provided with at least one second handle along the circumference, the center of the upper end of the gland is provided with a second polish rod hole which is communicated up and down, the inner side of the lower part of the inner cavity cylinder is provided with a plurality of packing groups which are sequentially stacked, the upper end of the packing group positioned at the top is provided with a pressing cap, and the upper end of the pressing cap is contacted with the inner side of the upper part of the gland.
The front sealing core can be arranged between the front sealing core and the front part of the central cylinder, and the rear sealing core can be arranged between the rear sealing core and the rear part of the central cylinder.
The front guide member comprises a front guide rod, a guide hole is radially formed in the outer side of the middle of the front sealing core, a radially through installation screw hole is formed in the front portion of a center barrel corresponding to the position of the guide hole, a front guide rod is screwed in the installation screw hole, the end of a screw rod is located in the guide hole, the front end section of the front guide rod corresponding to the front position of the front sealing core is square, and the rear guide member comprises a rear guide rod which is the same as the front guide rod in structure and is arranged in a centrosymmetric mode.
The front guide partition plate is fixedly installed on the inner side of the front portion of the center cylinder corresponding to the left position of the front guide rod, the cross section of the front guide partition plate is rectangular, a space is formed between the front guide partition plate and the outer side of the front seal core, an included angle between a vertical central plane of the front guide partition plate and a central axis of the guide hole is alpha, and alpha is obtained by a formula alpha = arcsin (H/R), wherein H is the height of the front seal core, and R is the diameter of an outer ring surface of the front seal core.
The right part of the central cylinder corresponding to the position between the front guide rod and the rear guide rod can be provided with a first glue injection hole which is radially communicated, the left part of the central cylinder is provided with a second glue injection hole which is centrosymmetrically distributed with the first glue injection hole, and glue injection valves are respectively arranged in the first glue injection hole and the second glue injection hole.
The included angle between the central axis of the first glue injection hole and the central axis of the guide hole can be between 70 degrees and 90 degrees.
The outer side of the middle part of the front sealing core is provided with a front outer ring groove, the outer side of the middle part of the rear sealing core is provided with a rear outer ring groove, the front outer ring groove and the rear outer ring groove can form an outer ring groove, the cross section of the outer ring groove is in a trapezoid shape with the outer width being wide and the inner width being narrow, and the guide hole is arranged on the bottom wall of the front outer ring groove.
The mounting hole before above-mentioned preceding sealed core middle part is equipped with, and back sealed core middle part is equipped with the back mounting hole, and preceding mounting hole and back mounting hole can form the annular hole of establishing of inlaying, inlay and establish downthehole the wearing spring coil that is equipped with.
According to the glue injection guide sealing blowout preventer, after the pressurized colloid is injected into the space formed by the upper sealing substrate, the lower sealing substrate, the inner side of the central cylinder and the guide sealing core, the pressurized colloid pushes the front sealing core and the rear sealing core to approach each other under the action of the front guide member and the rear guide member, so that the front sealing core and the rear sealing core contact the outer side of the rear sealing polished rod, the reliability and the operability of well head polished rod sealing are improved, the rapid sealing, the rapid unsealing and the flexible opening and closing are realized, the difficult problem of well head sealing of various oil wells is solved, the blowout prevention capability of the well head of the thermal recovery thickened oil is improved, the glue injection guide sealing blowout preventer is suitable for the well head sealing of the thermal recovery thickened oil under various working conditions, and the safety and the high efficiency in the operation of replacing packing of the well head are improved.
Drawings
FIG. 1 is a schematic top sectional view of the glue injection valve according to the first embodiment after the glue injection valve is removed.
FIG. 2 is a schematic right sectional view of the first embodiment.
FIG. 3 is a right side view partially in section and an enlarged structural schematic view of the guide seal core of FIG. 1.
Fig. 4 is a schematic perspective view illustrating a lower sealing substrate and a central tube integrally formed according to a first embodiment.
Fig. 5 is a schematic perspective view of an upper sealing substrate and a central tube integrally formed according to a first embodiment.
Fig. 6 is an exploded perspective view of the second embodiment with the glue injection valve, the front guide member and the rear guide member removed.
Fig. 7 is a schematic perspective view of the second embodiment in use.
Fig. 8 is a schematic sectional view of the right side of the third embodiment after the glue injection valve is removed.
Fig. 9 is a schematic perspective view of the three-dimensional structure in use.
Fig. 10 is a schematic right sectional view of the fourth embodiment with the glue injection valve removed.
Fig. 11 is a perspective view of the fourth embodiment.
FIG. 12 is a schematic diagram showing a partial sectional structure in a right view when the four and three embodiments are combined.
FIG. 13 is a top cross-sectional structural view of a spring coil.
FIG. 14 is a right side cross-sectional structural view of a spring coil.
The codes in the figures are respectively: the sealing structure comprises an upper sealing base 1, a lower sealing base 2, a front sealing core 3, a rear sealing core 4, a central cylinder 5, a front guide rod 6, a rear guide rod 7, a front guide baffle 8, a rear guide baffle 9, a first glue injection hole 10, a second glue injection hole 11, a front outer annular groove 12, a rear outer annular groove 13, a front connecting cylinder 14, a rear connecting cylinder 15, a front connecting plate 16, a rear connecting plate 17, a front half sealing base 18, a rear half sealing base 19, a first handle 20, an upper flange 21, a lower flange 22, a mounting flange 23, an inner cavity cylinder 24, a gland 25, a second handle 26, a packing 27, a gland 28, a press cap 29, a front mounting hole 30, a rear mounting hole 31, a spring ring a, an angle alpha between the vertical central plane of the front guide baffle and the central axis of the guide hole, and beta is an included angle between the central axis of the first glue injection hole and the central axis of the guide hole.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described below with reference to the following examples and figures:
the first embodiment is as follows: as shown in fig. 1, 2, 3, 4, and 5, the glue injection guiding sealing blowout preventer comprises a guiding sealing core, an upper sealing base 1, a lower sealing base 2, and a vertically arranged center barrel 5, wherein the guiding sealing core is coaxially sleeved on the inner side of the middle of the center barrel 5, the guiding sealing core comprises a front sealing core 3 and a rear sealing core 4 which are close to each other and can be sealingly inserted outside a light rod in the center barrel 5 after being contacted with each other, the front sealing core 3 and the rear sealing core 4 are both in a semicircular ring structure and are arranged in central symmetry, the left rear side of the front sealing core 3 is an inclined plane inclined from front to back from bottom to top, the right rear side of the front sealing core 3 and the left rear side of the front sealing core 3 are arranged in central symmetry, the inner side of the upper portion of the center barrel 5 corresponding to the upper end position of the front sealing core 3 is fixedly installed together with the upper sealing base 1 in a sealing manner, the inner side of the lower portion of the center barrel 5 corresponding to the lower end position of the front sealing core 3 is fixedly installed together with the lower sealing base 2 in a sealing manner, a front guiding clapboard 8 is fixedly installed on the inner side of the front portion of the center barrel 5, and a guiding clapboard 9 arranged in a central symmetry manner with the front guiding clapboard 8 is fixedly installed on the inner side of the rear portion of the center barrel 5.
According to requirements, the thickness of the central cylinder 5 is 10mm-20mm, the diameters of inner annular surfaces of the upper sealing substrate 1 and the lower sealing substrate 2 are 10 mm-30 mm larger than the diameter of the polished rod, the thicknesses of the upper sealing substrate 1 and the lower sealing substrate 2 are 5 mm-15 mm, the front guide partition plate 8 is flush with the front sealing core 3, the width of the front guide partition plate 8 is 8mm, the included angle between the rear side surface of the left part of the front sealing core 3 and the horizontal plane can be 45 degrees, the upper sealing substrate 1 and the lower sealing substrate 2 play a role in longitudinally limiting the guide sealing core to move up and down, if the upper sealing substrate 1 is in threaded connection with the central cylinder 5, the lower sealing substrate 2 is in integral forming with the central cylinder 5, and if the upper sealing substrate 1 is in integral forming with the central cylinder 5, the lower sealing substrate 2 is in threaded connection with the central cylinder 5. The invention aims at the difficult problem of well mouth sealing in the oil well measure operation (such as steam injection and liquid squeezing) and oil extraction process, the glue injection guiding sealing blowout preventer disclosed by the invention has the advantages that after the glue with pressure is injected into the space formed by the upper sealing base 1, the lower sealing base 2, the inner side of the central cylinder 5 and the guiding sealing core, the front guiding partition plate 8 and the rear guiding partition plate 9 can play a guiding role, the glue with pressure pushes the front sealing core 3 and the rear sealing core 4 to mutually approach, so that the front sealing core 3 and the rear sealing core 4 are contacted with the outer side of the rear sealing polished rod, the reliability and operability of well mouth polished rod sealing are improved, the purposes of quick sealing, quick deblocking and flexible opening and closing are realized, the difficult problem of well mouth sealing of various oil wells is met, particularly, the problem of well mouth sealing of the existing thick oil is solved, the well mouth blowout prevention capability of the thick oil thermal recovery is improved, the glue injection guiding sealing device is suitable for well mouth sealing of the thick oil recovery under various working conditions, and the safety and high efficiency in the packing replacement operation of the well mouth are improved.
The injection guiding sealing blowout preventer can be further optimized or/and improved according to actual requirements:
the second embodiment: as shown in fig. 6 and 7, the central cylinder includes a front connecting cylinder 14 and a rear connecting cylinder 15 which are symmetrically arranged in front and rear, front connecting plates 16 are fixed on the left and right sides of the rear end of the front connecting cylinder 14, rear connecting plates 17 are fixed on the left and right sides of the front end of the rear connecting cylinder 15, a plurality of first connecting through holes are distributed on the front side of each front connecting plate 16 at intervals up and down, a second connecting through hole is arranged on the front side of each rear connecting plate 17 corresponding to the position of each first connecting through hole, the front connecting cylinder 14 and the rear connecting cylinder 15 are fixedly mounted together by a connecting screw rod which is screwed with a nut after sequentially passing through the first connecting through hole and the second connecting through hole corresponding to the position through a screw end, the lower sealing substrate includes a front half sealing substrate 18 and a rear half sealing substrate 19 which are arranged in half, the front half sealing substrate 18 is fixedly mounted on the inner side of the lower portion of the front connecting cylinder 14, the rear half sealing substrate 19 is fixedly mounted on the inner side of the lower portion of the rear connecting cylinder 15, handle holes which are radially through are arranged on the front side of the middle of the front connecting cylinder 14 corresponding to the lower portion of the front half sealing substrate 18, and the rear connecting cylinder 15, and at least one handle hole 20 is distributed on the outer side of the upper portion of the upper sealing substrate 1 at intervals along the circumference.
The difference between the embodiment and the first embodiment lies in that the central cylinder is arranged differently, the glue injection guiding sealing blowout preventer shown in the embodiment is a stacked glue injection guiding sealing blowout preventer, which does not change the existing oil pumping wellhead sealing structure and is installed on the existing wellhead packing box (as shown in figure 6), the front connecting cylinder 14 and the rear connecting cylinder 15 pass through the existing packing box gland handle through handle holes and then are connected through a connecting screw and a nut, so that the central cylinder is seated on the existing packing box gland, the front half sealing base 18 and the rear half sealing base 19 can also be replaced by the top of the existing packing box gland, after pressurized glue is injected into a space formed by the upper sealing base 1, the lower sealing base, the inner side of the central cylinder and the guiding sealing core, the pressurized glue pushes the front sealing core 3 and the rear sealing core 4 to be close to each other, so that the front sealing core 3 and the rear sealing core 4 contact the outer side of a rear sealing polish rod, the central cylinder and the existing packing box gland are connected into a whole, the upper part of the upper sealing base 1 is additionally provided with the first handle 20, thus the purpose of assembling the stacked glue injection guiding sealing device in the existing packing box (as shown in figure 7), the drawing is convenient to replace the existing packing box, the oil well head sealing device, and the oil well sealing device, and the problem of high-recovery efficiency of the well is solved, and the well head sealing operation is improved.
Example three: as shown in fig. 8 and 9, an upper flange 21 is fixed on the outer side of the upper part of the central cylinder 5, a lower flange 22 is fixed on the outer side of the lower part of the central cylinder 5, and the connecting holes of the upper flange 21 correspond to the connecting holes of the lower flange 22 one by one.
The difference between the first embodiment and the second embodiment lies in the arrangement of the upper flange 21 and the lower flange 22, and the glue injection guiding sealing blowout preventer shown in the present embodiment is a pre-assembly type glue injection guiding sealing blowout preventer. According to the requirement, the upper flange 21 and the lower flange 22 are both known in the prior art, the upper sealing substrate 1 in this embodiment is integrally formed with the central cylinder 5, and the lower sealing substrate 2 is in threaded connection with the central cylinder 5. Before the existing wellhead packing box is installed, the embodiment is installed firstly, and the upper flange 21 and the lower flange 22 in the embodiment are installed between the existing oil pipe four-way joint and the packing box, so that the glue injection guide sealer can be preassembled at the lower part of the original packing box (as shown in an attached figure 9). After the pressurized colloid is injected into the space formed by the upper sealing substrate 1, the lower sealing substrate 2, the inner side of the central cylinder 5 and the guide sealing core, the pressurized colloid pushes the front sealing core 3 and the rear sealing core 4 to be close to each other, so that the front sealing core 3 and the rear sealing core 4 are in contact with the outer side of the rear sealing polished rod, the sealing problem of the conventional thickened oil well mouth is solved, the blowout prevention capability of the thermal recovery thickened oil well mouth is improved, the device is suitable for sealing the thermal recovery thickened oil well mouth under various working conditions, and the safety and the high efficiency in the packing replacement operation of the well mouth are improved.
Example four: as shown in fig. 10 and 11, a mounting flange 23 is fixedly mounted at the lower end of the central tube 5, an inner cavity tube 24 is fixedly mounted at the center of the upper end of the upper sealing substrate 1, the inner cavity tube 24 is a tubular structure with an open upper end and a closed lower end, a first polished rod hole is formed in the center of the lower end of the inner cavity tube 24, a gland 25 is screwed in the outer side of the upper end of the inner cavity tube 24 in a sealing manner, at least one second handle 26 is uniformly distributed on the outer side of the gland 25 along the circumference, a second polished rod hole which is through up and down is formed in the center of the upper end of the gland 25, a plurality of packing 27 which are stacked in sequence are arranged on the inner side of the lower portion of the inner cavity tube 24, a pressing cap 28 is arranged on the upper end of the packing 27 which is located at the top, and the upper end of the pressing cap 28 is in contact with the inner side of the upper portion of the gland 25.
The difference between the first embodiment and the second embodiment lies in the arrangement of the mounting flange plate 23 and the components above the upper sealing substrate 1, the injection guiding sealing blowout preventer shown in the present embodiment is an assembly type injection guiding sealing blowout preventer, according to requirements, an outer annular table is arranged on the outer side of the upper end of the pressing cap 28, and can move up and down between the upper end of the inner cavity barrel 24 and the inner side of the pressing cap, the mounting flange plate 23 can be an existing known offset flange, and is a new injection-production dual-purpose packing box designed and assembled, the same-pipe-diameter offset flange is mounted at the lower end of the central barrel 5, the upper end of the central barrel is connected with an existing packing box and a packing bin, so that one injection-production dual-purpose packing box can be assembled (as shown in fig. 11), or the third embodiment and the second embodiment can be combined in series to form a multi-stage sealing structure combination, so that one multi-stage sealing injection-production dual-purpose packing box is assembled (as shown in fig. 12). After injecting the pressurized colloid into the space formed by the upward sealing substrate 1, the lower sealing substrate 2, the inner side of the central cylinder 5 and the guide sealing core, the pressurized colloid pushes the front sealing core 3 and the rear sealing core 4 to be close to each other, so that the front sealing core 3 and the rear sealing core 4 are in contact with the outer side of the rear sealing polished rod, the reliability and operability of the well head polished rod sealing are improved, the flexibility and diversity of the glue injection guide sealing blowout preventer are improved, and the difficult problem of sealing of various oil well mouths can be met.
As shown in fig. 1 to 2 and 8 to 12, a front guide member, by which the front seal core 3 is radially movable, is provided between the front seal core 3 and the front portion of the center tube 5, and a rear guide member, by which the rear seal core 4 is radially movable, is provided between the rear seal core 4 and the rear portion of the center tube 5.
In the using process, through the arrangement, after the colloid with pressure is injected into the space formed by the upper sealing substrate 1, the lower sealing substrate 2, the inner side of the central cylinder 5 and the guide sealing core, the colloid with pressure pushes the front sealing core 3 and the rear sealing core 4 to approach each other under the action of the front guide member and the rear guide member, so that the front sealing core 3 and the rear sealing core 4 contact the outer side of the rear sealing polished rod.
As shown in fig. 1 to 2 and 8 to 12, the front guide member includes a front guide rod 6, a guide hole radially arranged is formed in the outer side of the middle of the front sealing core 3, a radially through installation screw hole is formed in the front portion of the center barrel 5 corresponding to the position of the guide hole, the front guide rod 6 with a screw rod end located in the guide hole is screwed in the installation screw hole, the cross section of the front end of the front guide rod 6 corresponding to the front position of the front sealing core 3 is square, and the rear guide member includes a rear guide rod 7 which has the same structure as the front guide rod 6 and is arranged in a central symmetry manner.
According to the demand, the diameter of the front guide rod 6 is 5-9mm, the diameter of the front guide rod 6 is 1mm smaller than that of the guide hole, the depth of the guide hole is two thirds of the thickness of the front sealing core 3, the thicknesses of the front sealing core 3 and the rear sealing core 4 are both between 20-45mm, the outer side of the middle part of the rear sealing core 4 is also provided with a guide hole which is radially arranged, the rear part of the central cylinder 5 corresponding to the position of the guide hole is provided with a radially through installation screw hole, the two guide holes and the two installation screw holes are symmetrically arranged in the center, the rear guide rod 7 is arranged in the installation screw hole and the guide hole at the rear part, the section of the front end of the front guide rod 6 corresponding to the front position of the front sealing core 3 can also be in a hexagon, and the front end of the front guide rod 6 can also be fixed with a handle so as to be convenient for dismounting. In the use, preceding guide bar 6 spiro union is in the mounting screw, both can prescribe a limit to the position of preceding sealed core 3, can seal the shutoff again to the mounting screw, the maintenance of pressure when being convenient for follow-up injecting glue.
As shown in fig. 1, 2, 4, 5, 6, 8, and 10, the front guide diaphragm 8 is fixedly installed at the front inner side of the center cylinder 5 corresponding to the left position of the front guide rod 6, a cross section of the front guide diaphragm 8 is rectangular, a space is provided between the front guide diaphragm 8 and the outer side of the front seal core 3, an included angle between a vertical center plane of the front guide diaphragm 8 and a center axis of the guide hole is α, where a is obtained by a formula α = arcsin (H/R), where H is a height of the front seal core, and R is a diameter of an outer ring plane of the front seal core.
According to requirements, H is the height of the front seal core 3, i.e. the distance between the upper end face and the lower end face of the front seal core 3, H is between 20 and 45mm, R is the diameter of the outer annular face of the front seal core 3, the distance between the outer annular face of the front seal core 3 and the inner annular face of the central cylinder 5 is between 20 and 40mm, and the included angle α may be 33 °. In the use, through such setting, can play the positioning action to guiding hole and installation screw according to preceding guide baffle 8, the setting of the guiding hole of being convenient for and installation screw, seal core 3 and back 4 outsides forward and pour into the high pressure colloid after, preceding guide baffle 8 and back guide baffle 9 can play the guide effect to the high pressure colloid for be close to each other and contact after preceding seal core 3 and the 4 radial migration of back seal core.
As shown in the attached figures 2, 4, 5, 6, 8 to 12, a first glue injection hole 10 which is radially communicated is arranged at the right part of a central cylinder 5 corresponding to the position between a front guide rod 6 and a rear guide rod 7, a second glue injection hole 11 which is centrally and symmetrically distributed with the first glue injection hole 10 is arranged at the left part of the central cylinder 5, and glue injection valves are arranged in the first glue injection hole 10 and the second glue injection hole 11.
According to the requirement, the glue injection valve is the prior known technology. In the use process, through the arrangement, high-pressure colloid is conveniently injected into the space formed by the upper sealing substrate 1, the lower sealing substrate 2, the inner side of the central cylinder 5 and the guide sealing core, and the sealing operation is simple and convenient. After a space formed by the upper sealing substrate 1, the lower sealing substrate 2, the inner side of the central cylinder 5 and the guide sealing core is filled with glue, the glue injection valve is closed, the glue in the space is kept at high pressure, and finally the front sealing core 3 and the rear sealing core 4 are mutually contacted and are kept in sealing contact with the outer side of the polished rod; when the sealing is required to be released, the glue injection valve is opened to discharge the glue, so that the pressure of the glue in a space formed by the upper sealing substrate 1, the lower sealing substrate 2, the inner side of the central cylinder 5 and the guide sealing core can be released, and the sealing can be rapidly released.
As shown in fig. 2, 4, 5, 6 and 9, an included angle β between a central axis of the first glue injection hole 10 and a central axis of the guide hole is between 70 ° and 90 °.
According to the requirement, the included angle beta between the central axis of the first glue injection hole 10 and the central axis of the guide hole is 80 degrees. In the use, through such setting, can make first notes gluey hole 10 and second annotate gluey hole 11 just to preceding sealed core 3 and the middle part of back sealed core 4, through first notes gluey hole 10 and second annotate gluey hole 11 in inject high pressure colloid after, the colloid acts on preceding sealed core 3 and the middle part of back sealed core 4, can guarantee before sealed core 3 and back sealed core 4 quick radial movement back be close to each other and contact.
As shown in fig. 1, 3, 6, 8, 10 and 12, a front outer ring groove 12 is formed on the outer side of the middle portion of the front seal core 3, a rear outer ring groove 13 is formed on the outer side of the middle portion of the rear seal core 4, the front outer ring groove 12 and the rear outer ring groove 13 can form an outer ring groove, the cross section of the outer ring groove is a trapezoid with an outer width and an inner width, and a guide hole is formed in the bottom wall of the front outer ring groove 12.
According to requirements, the cross section of the outer ring groove is in an isosceles trapezoid shape, the groove bottom width of the outer ring groove is 10mm, the groove top width is 18mm, and the groove depth is 15mm. In the use, through setting up outer annular groove, when through the downthehole injecting glue of injecting glue valve and injecting glue, the colloid can flow along outer annular inslot for the colloid acts on preceding sealed core 3 and the 4 middle parts of back sealed core, makes preceding sealed core 3 and back sealed core 4 be close to simultaneously and hold the polished rod realization sealed to the polished rod tightly.
As shown in fig. 13 and 14, a front mounting hole 29 is formed in the middle of the front sealing core 3, a rear mounting hole 30 is formed in the middle of the rear sealing core 4, the front mounting hole 29 and the rear mounting hole 30 can form an annular embedding hole, and a spring ring 31 is arranged in the embedding hole.
In the use process, when the space formed by the upper sealing substrate 1, the lower sealing substrate 2, the inner side of the central cylinder 5 and the guide sealing core is filled with colloid and sealing needs to be relieved, the glue injection valve is opened to discharge the colloid, the spring ring 31 can enable the front sealing core 3 and the rear sealing core 4 to be ejected away from the polish rod, and the sealing can be quickly released.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. An injection guiding sealing blowout preventer is characterized by comprising a guiding sealing core, an upper sealing base, a lower sealing base and a vertically arranged center barrel, wherein the guiding sealing core is coaxially sleeved on the inner side of the middle part of the center barrel and comprises a front sealing core and a rear sealing core which are close to each other and can be hermetically arranged on the outer side of a polished rod in the center barrel in a penetrating way after being contacted, the front sealing core and the rear sealing core are of semicircular ring structures and are arranged in central symmetry, the left rear side surface of the front sealing core is an inclined surface which is inclined from bottom to top from front to back, the right rear side surface of the front sealing core and the left rear side surface of the front sealing core are arranged in central symmetry, the inner side of the upper part of the center barrel corresponding to the upper end position of the front sealing core is fixedly and hermetically installed with the annular upper sealing base, the inner side of the lower part of the center cylinder corresponding to the lower end of the front sealing core is fixedly and hermetically installed with the annular lower sealing base, the inner side of the front part of the center cylinder is fixedly and fixedly provided with a front guide partition plate, the inner side of the rear part of the center cylinder is fixedly and centrally symmetrically provided with a rear guide partition plate, after pressurized colloid is injected into a space formed by the upper sealing base, the lower sealing base, the inner side of the center cylinder and the guide sealing core, the pressurized colloid pushes the front sealing core and the rear sealing core to be close to each other, so that the front sealing core and the rear sealing core are in contact with the outer side of the rear sealing polished rod, when the sealing is required to be relieved, the pressure of the colloid in the space formed by the upper sealing base, the lower sealing base, the inner side of the center cylinder and the guide sealing core is released, and the sealing can be rapidly relieved.
2. The glue injection guiding sealing blowout preventer as claimed in claim 1, wherein the central cylinder comprises a front connecting cylinder and a rear connecting cylinder which are symmetrically arranged in front and rear, front connecting plates are fixed on the left and right sides of the rear end of the front connecting cylinder, rear connecting plates are fixed on the left and right sides of the front end of the rear connecting cylinder, a plurality of first connecting through holes are vertically distributed on the front side of each front connecting plate at intervals, second connecting through holes are arranged on the front side of each rear connecting plate corresponding to the positions of the first connecting through holes, the front connecting cylinder and the rear connecting cylinder are fixedly installed together through connecting screws with nuts screwed in the rear of the first connecting through holes and the second connecting through holes in corresponding positions by screw ends, the lower sealing substrate comprises a front half sealing substrate and a rear half sealing substrate which are arranged in half-half, the front half sealing substrate is fixedly installed on the inner side of the lower portion of the front connecting cylinder, the rear half sealing substrate is fixedly installed on the inner side of the lower portion of the rear connecting cylinder, handle holes which are radially arranged in the front middle of the front connecting cylinder and the rear connecting cylinder are arranged in half sealing substrate, and at least one first handle which is radially arranged on the outer side of the upper portion of the upper sealing substrate at intervals along the circumference.
3. The glue injection guide seal blowout preventer of claim 1, wherein the outer side of the upper portion of the central cylinder is fixed with an upper flange, the outer side of the lower portion of the central cylinder is fixed with a lower flange, and the connecting holes of the upper flange correspond to the connecting holes of the lower flange one to one.
4. The glue injection guiding sealing blowout preventer as claimed in claim 1, wherein a mounting flange is fixedly mounted at the lower end of the central cylinder, an inner cylinder is fixedly mounted at the center of the upper end of the upper sealing base, the inner cylinder is of a cylindrical structure with an open upper end and a closed lower end, a first polished rod hole is formed in the center of the lower end of the inner cylinder, a gland is screwed in the outer side of the upper end of the inner cylinder in a sealing manner, at least one second handle is uniformly distributed on the outer side of the gland along the circumference, a second polished rod hole which is communicated up and down is formed in the center of the upper end of the gland, a plurality of packing groups which are stacked in sequence are arranged on the inner side of the lower portion of the inner cylinder, a pressing cap is arranged on the upper end of the packing group which is located uppermost, and the upper end of the pressing cap is in contact with the inner side of the upper portion of the gland.
5. The compound injection guide sealing blowout preventer of claim 1, 2, 3 or 4, wherein a front guide member capable of radially moving the front seal core is arranged between the front seal core and the front part of the central cylinder, and a rear guide member capable of radially moving the rear seal core is arranged between the rear seal core and the rear part of the central cylinder.
6. The glue injection guide sealing blowout preventer as claimed in claim 5, wherein the front guide member comprises a front guide rod, a guide hole is radially formed in the outer side of the middle of the front sealing core, a mounting screw hole is radially formed in the front portion of the center barrel corresponding to the position of the guide hole, a front guide rod with a screw rod end located in the guide hole is screwed in the mounting screw hole, the section of the front end of the front guide rod corresponding to the front position of the front sealing core is square, and the rear guide member comprises a rear guide rod which is identical in structure to the front guide rod and is centrally symmetrically arranged.
7. The compound injection guide seal blowout preventer of claim 6, wherein the front guide bulkhead is fixedly mounted on a front inner side of the center cylinder at a position corresponding to a left side of the front guide rod, the front guide bulkhead has a rectangular cross-section, a space is defined between the front guide bulkhead and an outer side of the front seal core, and an angle between a vertical center plane of the front guide bulkhead and a center axis of the guide bore is a, a is obtained by a formula a = arcsin (H/R), where H is a height of the front seal core and R is a diameter of an outer ring plane of the front seal core.
8. The glue injection guide sealing blowout preventer as claimed in claim 6 or 7, wherein a first glue injection hole which penetrates radially is formed in the right portion of the central cylinder corresponding to the position between the front guide rod and the rear guide rod, a second glue injection hole which is distributed in central symmetry with the first glue injection hole is formed in the left portion of the central cylinder, and glue injection valves are installed in the first glue injection hole and the second glue injection hole.
9. The glue injection guide seal blowout preventer of claim 8, wherein an included angle between a central axis of the first glue injection hole and a central axis of the guide hole is between 70 ° and 90 °.
10. The injection guiding sealing blowout preventer as claimed in claim 6, 7 or 9, wherein the front outer ring groove is formed on the outer side of the middle part of the front sealing core, the rear outer ring groove is formed on the outer side of the middle part of the rear sealing core, the front outer ring groove and the rear outer ring groove can form an outer ring groove, the cross section of the outer ring groove is a trapezoid with a wide outer part and a narrow inner part, and the guiding hole is formed in the bottom wall of the front outer ring groove; or/and the middle part of the front sealing core is provided with a front mounting hole, the middle part of the rear sealing core is provided with a rear mounting hole, the front mounting hole and the rear mounting hole can form an annular embedding hole, and a spring ring penetrates through the embedding hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211237219.4A CN115306342B (en) | 2022-10-11 | 2022-10-11 | Glue injection guiding sealing blowout preventer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211237219.4A CN115306342B (en) | 2022-10-11 | 2022-10-11 | Glue injection guiding sealing blowout preventer |
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| CN115306342B true CN115306342B (en) | 2023-02-03 |
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Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1056721A (en) * | 1977-02-09 | 1979-06-19 | Albert I. Bruce | Blow out preventer |
| US7380590B2 (en) * | 2004-08-19 | 2008-06-03 | Sunstone Corporation | Rotating pressure control head |
| RU2274728C1 (en) * | 2004-11-18 | 2006-04-20 | Сибирское научно-производственное предприятие бурового машиностроения (ЗАО НПП "СибБурМаш") | Well head sealing device |
| CN201016288Y (en) * | 2006-03-23 | 2008-02-06 | 钟仲良 | Well mouth hydraulic self-sealing equipment |
| CN201125698Y (en) * | 2007-12-11 | 2008-10-01 | 林天伟 | Polish rod sealer hydraulic type second grade sealing device |
| SG175140A1 (en) * | 2009-04-09 | 2011-11-28 | Fmc Technologies | Nested cylinder compact blowout preventer |
| CN201496027U (en) * | 2009-10-06 | 2010-06-02 | 雷宽成 | compensating self-sealing blowout preventer |
| WO2015168445A2 (en) * | 2014-04-30 | 2015-11-05 | Weatherford Technology Holdings, Llc | Sealing element mounting |
| CN204225826U (en) * | 2014-08-22 | 2015-03-25 | 大庆红祥寓科技有限公司 | Anti-breaking bar injecting glue particle blowout preventer |
| US9816349B2 (en) * | 2014-11-10 | 2017-11-14 | Chevron U.S.A. Inc. | Inflatable casing valve |
| CN105089538B (en) * | 2015-05-22 | 2017-12-01 | 克拉玛依胜利高原机械有限公司 | A kind of sealing structure for having bar production wellhead polished rod |
| CN204691721U (en) * | 2015-05-22 | 2015-10-07 | 克拉玛依胜利高原机械有限公司 | A kind of hermetically-sealed construction having bar production wellhead polished rod |
| CN106930717B (en) * | 2015-12-31 | 2019-09-03 | 中国石油天然气股份有限公司 | The well mouth sealing device of underground heating cable |
| CN205638319U (en) * | 2016-04-15 | 2016-10-12 | 中国石油天然气股份有限公司 | Polished rod sealing device |
| CN107178333B (en) * | 2017-07-25 | 2023-06-09 | 东营市昌瑞石油机械配件有限责任公司 | Polished rod sealer |
| CN108240195A (en) * | 2018-02-08 | 2018-07-03 | 许和谦 | Polished rod sealer |
| CN109025886B (en) * | 2018-08-31 | 2020-09-08 | 黑龙江省易爱蒽新材料科技发展有限公司 | Reciprocating axial sealing deviation-adjusting energy-saving blowout preventer |
| CN111173470A (en) * | 2018-11-13 | 2020-05-19 | 中国石油天然气股份有限公司 | Sealing device and sealing method for polished rod of oil pumping unit |
| CN111305786B (en) * | 2020-04-17 | 2021-01-26 | 濮阳市大通机泵有限公司 | Automatic tight packing polished rod sealer |
| CN213016269U (en) * | 2020-08-13 | 2021-04-20 | 北京方圆天地油气技术有限责任公司 | Wellhead fluid director |
| CN216110626U (en) * | 2021-06-28 | 2022-03-22 | 中国石油化工股份有限公司 | Hydraulic wellhead sealer |
-
2022
- 2022-10-11 CN CN202211237219.4A patent/CN115306342B/en active Active
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