CN112943149B - Top drive internal blowout preventer switching device - Google Patents
Top drive internal blowout preventer switching device Download PDFInfo
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- CN112943149B CN112943149B CN202110091283.5A CN202110091283A CN112943149B CN 112943149 B CN112943149 B CN 112943149B CN 202110091283 A CN202110091283 A CN 202110091283A CN 112943149 B CN112943149 B CN 112943149B
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- assembly
- bearing
- sliding sleeve
- blowout preventer
- gear
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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 discloses a switch device of a top drive internal blowout preventer, which comprises an internal blowout preventer, wherein a switch ball valve is arranged on the internal blowout preventer, the switch device also comprises a turn-off assembly for turning on and off the switch ball valve on the internal blowout preventer, and the turn-off assembly is detachably sleeved and connected on the outer side of the internal blowout preventer. The shutoff assembly and the inner blowout preventer are detachably mounted together, the mounting position does not need to be reserved at the beginning of the top drive design, and the mounting is more convenient.
Description
Technical Field
The invention relates to the field of oil drilling, in particular to a top drive internal blowout preventer switching device.
Background
The well control technology is important for research and development in order to safely and well-drilling with high quality and prevent accidents such as blowout and well kick. The top drive internal blowout preventer is used as an important internal blowout preventer in a drilling system, and the performance and the working reliability of the top drive internal blowout preventer directly influence the safety of well site personnel and property in drilling operation.
The top drive inner blowout preventer is divided into an upper inner blowout preventer and a lower inner blowout preventer, and the structure of the upper inner blowout preventer and the structure of the lower inner blowout preventer are basically the same as that of the kelly bar plug valve. The upper inner blowout preventer is driven by a hydraulic actuating mechanism, is also called as an automatic inner blowout preventer and is opened and closed by a driller through the operation of a top drive control box; the lower inner blowout preventer is a manual inner blowout preventer, and a knob is driven to open and close manually through a cock wrench. During well control, the upper automatic internal blowout preventer needs to be closed first. The reliability research of the top drive internal blowout preventer is that the stability and the reliability of a driving device are also very important besides the improvement of the reliability of a plug valve body.
At present, the switching off and the switching on of the top drive internal blowout preventer are realized by the following technologies:
one technique is: the top drive internal blowout preventer switching device realizes the opening and closing of the top drive automatic internal blowout preventer through a driving gear rack mechanism. The driving gear is connected with the knob connecting rod of the inner blowout preventer body to drive the valve core ball of the inner blowout preventer to rotate, the rack is used as a driving rack and a hydraulic cylinder rod, the driving gear rotates through the end pressure oil source to realize the opening and closing of the inner blowout preventer, and the structure is compact, the size is small, and the driving torque is large.
This technique has the following disadvantages:
1. when the valve plug ball is driven by the rack, lateral force is born;
2. the gear is used as a hydraulic cylinder rod, and has great influence on the service life of a sealing ring of the hydraulic cylinder.
Another technique is: the internal blowout preventer is driven to open and close through the gear rack mechanism, and the hydraulic cylinder is arranged externally. The cylinder body of the hydraulic cylinder is connected with an upper driving sleeve, a piston rod is connected with a lower driving sleeve, and racks are respectively processed on the upper driving sleeve and the lower driving sleeve. In the working process, the acting force of the hydraulic cylinder is converted into the rotating torque of the gear to drive the inner blowout preventer to open and close, and the upper driving sleeve and the lower driving sleeve move. The bearings are assembled in the upper and lower driving sleeves, the hydraulic cylinder is fixed on the top drive back-up tong through the shell, and the driving sleeve rotates along with the main shaft when the main shaft rotates. The gear rack mechanism has good synchronism and large transmission torque when driven by double hydraulic cylinders.
This technique has the following disadvantages:
1. the adopted gear is directly contacted with the pressing plate, so that the tendency that the gear is separated outwards is limited, the pressing plate is rubbed while the rack moves up and down, and the pressing plate and the gear are quickly abraded;
2. the upper and lower driving sleeves are directly processed into a toothed bar shape, the driving sleeves are not provided with guide members, the left and right movement is completely limited by a valve core ball of the inner blowout preventer, and lateral force generated by the upper and lower driving sleeves directly acts on the valve core ball, so that the abrasion is aggravated, and the service life is seriously influenced;
3. the upper and lower driving sleeves need to be close to and far away from the center of the valve core ball at the same time to achieve the purpose of opening or closing the internal blowout preventer, the stroke of the upper and lower driving sleeves is adjusted by the aid of the limiting columns and the gaskets between the upper and lower driving sleeves, the accuracy of the stroke is guaranteed by adjusting the thickness of the gaskets, and the installation is inconvenient.
Most domestic top drive IBOP shutoff devices adopt a double-hydraulic-cylinder drive sliding sleeve structure. The inner blowout preventer mainly comprises a driving hydraulic cylinder, an automatic inner blowout preventer, a rocker arm assembly, a roller support and a sliding sleeve. In the working process, the double hydraulic cylinders drive the sliding sleeve and drive the rocker arm assembly to realize the opening and closing of the internal blowout preventer; the roller structure has a single-side double-roller structure and a single-roller structure similar to an NOV. The top drive has a simple structure and a large total volume, and the driving force is determined by the size of a hydraulic cylinder, the pressure of an oil source, the length of a rocker arm and other factors.
This technique has the following disadvantages:
1. the oil cylinder needs to be arranged on the top drive body, so that the design of the top drive is limited;
2. the installation position needs to be reserved at the beginning of the design of the top drive, so that the blowout preventer switching device in the top drive cannot be suitable for top drives of more types;
3. the distance of the rocker arm relative to the central axis is a variable value in the motion process, so that the turn-off and turn-on torque is a variable value, the turn-off and turn-on force reaches the maximum value from the tail end of the stroke, and the rocker arm has great impact at the starting moment and has great influence on the service life of the device.
Disclosure of Invention
The invention aims to: aiming at the problem that the switch device of the top drive internal blowout preventer is inconvenient to install in the prior art, the switch device of the top drive internal blowout preventer is provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a top drive internal blowout preventer switching device, includes interior preventer, be equipped with the switch ball valve on the interior preventer, still including being used for the break-make on the interior preventer the shutoff assembly of switch ball valve, shutoff assembly detachably cover establish connect in the outside of interior preventer.
A top drives interior preventer switching device, through above-mentioned structure, shuts off the assembly and installs together with interior preventer detachably, need not just reserve the mounted position at the beginning of the design is driven on the top, and it is more convenient to install.
As a preferable scheme of the invention, the shut-off assembly comprises a shut-off body sleeved outside the internal blowout preventer and a limiting component for limiting the shut-off assembly along the axial direction of the internal blowout preventer, and the limiting component is connected with the internal blowout preventer.
As a preferred scheme of the invention, the shutoff body comprises an inner sleeve assembly, a gear shaft assembly, an oil cylinder assembly, a sliding sleeve assembly and a rack;
the inner sleeve assembly is sleeved on the outer side of the inner blowout preventer, and the limiting assembly axially limits the inner sleeve assembly along the inner blowout preventer;
the sliding sleeve assembly is sleeved on the outer side of the inner sleeve assembly and can move back and forth relative to the inner sleeve assembly along the axial direction of the inner blowout preventer;
one end of the oil cylinder assembly is connected with the sliding sleeve assembly, and the other end of the oil cylinder assembly is connected with one end of the inner sleeve assembly, which is far away from the sliding sleeve assembly;
the rack is arranged on the sliding sleeve assembly;
the gear shaft assembly is meshed with the rack and can be used for switching on and off the switch ball valve.
As a preferable scheme of the invention, the inner sleeve assembly is provided with a guide key, the sliding sleeve assembly is correspondingly provided with a sliding sleeve guide key groove, the guide key is positioned in the sliding sleeve guide key groove, and the guide key is in sliding fit with the sliding sleeve guide key groove along the axial direction of the inner blowout preventer. Through the structure, the relative rotation of the inner sleeve assembly and the sliding sleeve assembly can be limited, the additional moment of the relative rotation is eliminated, the load on the switch ball valve is further reduced, and the service life of the inner blowout preventer is prolonged.
According to the preferable scheme of the invention, the inner blowout preventer is further provided with a switch shaft, the switch shaft is in driving connection with the switch ball valve, the gear shaft assembly is in driving connection with the switch shaft, and through the structure, the gear shaft drives the switch shaft to rotate to realize the on-off of the switch ball valve.
As a preferable mode of the present invention, the gear shaft assembly includes a third bearing, a gear, a hexagonal shaft, and a connecting plate, the third bearing is mounted in the gear and coaxial with the gear, the connecting plate is connected with the hexagonal shaft, the hexagonal shaft is located in the switch shaft, a lower portion of an outer ring of the third bearing is in contact with the connecting plate, and the rack and the gear form a rack-and-pinion fit.
As a preferable scheme of the present invention, the inner sleeve assembly includes a shaft sleeve, both ends of the hexagonal shaft are provided with hexagonal shaft ends, one end of the hexagonal shaft passes through the shaft sleeve and is installed in the switch shaft, and the other end of the hexagonal shaft is installed in a hexagonal inner hole of the gear and is coaxial with the gear.
As a preferable scheme of the present invention, the oil cylinder assembly includes a hydraulic cylinder rod, a hydraulic cylinder barrel and a mounting seat, one end of the hydraulic cylinder rod is connected to the sliding sleeve assembly through the mounting seat, and the other end of the hydraulic cylinder rod is connected to the inner sleeve assembly through the hydraulic cylinder barrel.
As a preferable scheme of the present invention, one end of the hydraulic cylinder rod connected to the mounting seat is provided with a thread, the upper portion and the lower portion of the mounting seat are respectively provided with a cylinder rod upper nut and a cylinder rod lower nut, the threaded end of the hydraulic cylinder rod passes through the mounting seat, the end portion of the threaded end extends out of the mounting seat, and the threaded end is in threaded connection with the cylinder rod lower nut. Through the structure, the accuracy of the stroke of the oil cylinder assembly can be ensured by adjusting the upper nut of the cylinder rod and the lower nut of the cylinder rod, and the operation is more convenient.
As a preferable scheme of the present invention, the shutdown body further includes two gear pressing plates, the gear pressing plates are installed in the inner sleeve assembly, the gear pressing plates are connected to the gear shaft assembly, the gear pressing plates are provided with first annular protrusions, and the first annular protrusions are located in the third bearing and abut against the third bearing. Through the structure, in the turn-off and turn-on processes of the internal blowout preventer switching device, the gear is in a rotating state, and the gear pressing plate presses the gear shaft assembly and is abutted against the third bearing, so that the friction of the gear shaft assembly is the rolling friction of the bearing, and the abrasion of a hexagonal shaft in the gear shaft assembly is reduced to the maximum extent.
As a preferred scheme of the invention, the inner sleeve assembly comprises an upper bearing gland, a sealing ring, an upper bearing pressing ring, a first limit screw, a first bearing, an upper bearing box, an upper labyrinth gland and an inner sleeve, wherein the upper bearing pressing ring is installed in a pressing ring groove of the upper bearing box, the upper bearing gland is fixedly connected with the inner sleeve, the sealing ring is positioned between the upper bearing gland and the inner sleeve, a first bearing inner ring is installed on the inner sleeve, and a first bearing outer ring is installed on the upper bearing box;
the upper labyrinth seal sleeve is arranged on the inner sleeve and is matched with the first labyrinth seal groove of the upper bearing box;
the first limiting screw penetrates through a first limiting screw hole of the upper bearing pressing ring and a second limiting screw hole of the upper bearing box, a first hole check ring is arranged above the first limiting screw, and the hole check ring is installed in the upper bearing box;
the gear pressing plate is installed on the inner sleeve. Through above-mentioned structure, relative rotation between first stop screw can the restriction upper bearing clamping ring and the upper bearing box.
As a preferable scheme of the invention, upper bearing ring teeth are arranged on the upper bearing ring, upper bearing box limiting teeth are arranged on the upper bearing box, and the upper bearing ring teeth are matched with the upper bearing box limiting teeth. Through the structure, the upper bearing pressing ring is limited to move up and down through the up-down matching between the upper bearing pressing ring teeth and the upper bearing box limiting teeth.
As a preferred scheme of the present invention, a first key groove is formed on the upper bearing box, and a first square flange is formed on the hydraulic cylinder barrel and is matched with the first key groove.
As a preferred scheme of the invention, the sliding sleeve assembly comprises a sliding sleeve, a lower bearing box, a second bearing, a lower bearing pressing ring, a lower labyrinth gland and a sliding sleeve hoop, wherein an inner ring of the second bearing is arranged on the sliding sleeve, the upper part of the inner ring of the second bearing is tightly pressed by the sliding sleeve, the lower part of the inner ring of the second bearing is in contact with the lower labyrinth gland, the sliding sleeve hoop is arranged on the sliding sleeve, and the lower labyrinth gland is in contact with the sliding sleeve hoop;
the outer ring of the second bearing is arranged on the lower bearing box, the upper part of the outer ring of the second bearing is contacted with the lower bearing box, the lower bearing pressing ring is arranged in a second pressing ring groove of the lower bearing box, lower bearing pressing ring teeth of the lower bearing pressing ring are matched with lower bearing box limiting teeth of the lower bearing box, and the lower part of the outer ring of the second bearing is contacted with the lower bearing pressing ring;
the lower labyrinth seal sleeve is matched with a second labyrinth seal groove of the lower bearing box to form labyrinth seal, and the annular groove of the sliding sleeve is matched with a second annular protrusion of the lower bearing box to form labyrinth seal;
the sliding sleeve guide key groove is positioned in the sliding sleeve. Through the structure, the up-and-down movement of the upper bearing pressing ring is limited through the up-and-down matching between the lower bearing pressing ring teeth and the lower bearing box limiting teeth.
As a preferable scheme of the present invention, the sliding sleeve assembly further includes a second limit screw, the second limit screw passes through a fourth limit screw hole of the lower bearing pressing ring and a third limit screw hole of the lower bearing box, and a second hole retainer ring installed on the lower bearing box is provided above the second limit screw. Through above-mentioned structure, the relative rotation between bearing clamping ring and the lower bearing box can be restricted down to the second stop screw.
As a preferable scheme of the present invention, a second key groove is formed on the lower bearing box, a second square flange is formed on the mounting seat, and the second square flange is matched with the second key groove.
As a preferable scheme of the present invention, the rack is provided with a longitudinal key groove and a transverse key, the transverse key is inserted into the rack transverse key groove of the sliding sleeve, the sliding sleeve assembly further comprises a rack limiting key, the rack limiting key is inserted into the longitudinal key groove and the rack longitudinal key groove of the sliding sleeve and is fixedly connected with the sliding sleeve, and the rack is connected with the sliding sleeve through a screw.
As a preferable scheme of the invention, the blowout preventer further comprises an anti-rotation block, the anti-rotation block is arranged outside the internal blowout preventer, and the anti-rotation block is used for blocking the first square flange to prevent the oil cylinder assembly from rotating. Through the structure, the anti-rotation block can limit the relative rotation of the oil cylinder assembly and the sliding sleeve assembly relative to the top drive;
and/or the presence of a gas in the gas,
the anti-rotation block is arranged below the oil cylinder assembly and used for blocking the mounting seat to prevent the oil cylinder assembly from rotating.
As a preferable scheme of the present invention, the limiting assembly includes hoop assemblies disposed at both ends of the shutoff body, and the hoop assemblies are connected to the internal blowout preventer.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the structure, the turn-off assembly and the inner blowout preventer are detachably mounted together, a mounting position does not need to be reserved at the beginning of the design of the top drive, and the mounting is more convenient;
2. through the structure, the additional axial acting force of a gear rack in the original technical scheme on the switch ball valve is transmitted to the inner sleeve assembly through the shaft sleeve which is matched with the gear shaft assembly and is positioned on the inner sleeve assembly, so that the additional radial acting force of the switch ball valve is eliminated, and the service life of the switch ball valve is prolonged;
3. through the structure, the accuracy of a stroke can be ensured only by adjusting the upper nut and the lower nut of the cylinder rod, and the device is more convenient compared with other technical schemes;
4. according to the structure, the third bearing is arranged at the outer end of the rotating gear shaft assembly, the gear pressing plate is pressed on the bearing, and compared with the condition that the pressing plate is directly pressed on the gear shaft assembly, the rotating friction resistance of the gear assembly is smaller, and the noise generated during rotation is lower;
5. a top drive internal blowout preventer switching device, through above-mentioned structure, adopt the upper and lower cooperation restriction bearing's of the bearing clamping ring that takes the tooth and the bearing box that takes the tooth to move from top to bottom on the fixing of first bearing and second bearing to prevent through stop screw that the bearing clamping ring rotates, can further reduce the spatial structure size of bearing fixed mode.
Drawings
FIG. 1 is a schematic illustration of the installation of a top drive internal blowout preventer switchgear in accordance with the present invention.
FIG. 2 is a schematic diagram of a top drive internal blowout preventer switchgear in an OFF state in accordance with the present invention.
FIG. 3 is a schematic diagram of a top drive internal blowout preventer switchgear in an open state in accordance with the present invention.
Figure 4 is an exploded view of the shutoff assembly of the present invention.
Fig. 5 is a cross-sectional view of a shutoff assembly in accordance with the present invention.
Fig. 6 is a partially enlarged view of the region Z in fig. 5.
FIG. 7 is a schematic diagram of the internal blow out preventer of the present invention.
FIG. 8 is a cross-sectional view of an internal blow out preventer of the present invention.
Fig. 9 is an exploded view of the hoop assembly of the present invention.
Fig. 10 is a schematic structural view of an inner sleeve assembly according to the present invention.
Fig. 11 is an exploded view of the inner sleeve assembly according to the present invention.
Figure 12 is a cross-sectional view of an inner sleeve assembly according to the present invention.
Fig. 13 is a partially enlarged view of the area Y in fig. 12.
Fig. 14 is a schematic structural view of the upper bearing cartridge according to the present invention.
Fig. 15 is a partially enlarged view of the area a in fig. 14.
FIG. 16 is a schematic view of the construction of an upper bearing race in accordance with the present invention.
Fig. 17 is a schematic structural view of a gear shaft assembly according to the present invention.
FIG. 18 is a cross-sectional view of the gear shaft assembly of the present invention.
Fig. 19 is a schematic structural view of the gear pressing plate according to the present invention.
Fig. 20 is a schematic structural view of the gear pressing plate according to the present invention.
Fig. 21 is a schematic structural view of the cylinder assembly according to the present invention.
Fig. 22 is a cross-sectional view of a cylinder assembly according to the present invention.
Figure 23 is a schematic structural view of a sliding sleeve assembly according to the present invention.
Figure 24 is a schematic structural view of the sliding sleeve assembly according to the present invention.
Figure 25 is a cross-sectional view of a sliding sleeve assembly according to the present invention.
Fig. 26 is a partially enlarged view of the X region in fig. 25.
Fig. 27 is a schematic structural view of the sliding sleeve of the present invention.
Fig. 28 is a schematic structural view of a lower bearing cartridge according to the present invention.
Fig. 29 is a schematic view of the construction of the rack according to the present invention.
Fig. 30 is a schematic view of the construction of the rack according to the present invention.
Icon: 1-a shut-off assembly; 11-a hoop assembly; 111-left hoop; 112-right hoop; 12-an inner sleeve component; 121-upper bearing gland; 122-a sealing ring; 123-upper bearing pressing ring; 1231-upper bearing race teeth; 1232-a first stop screw hole; 124-first hole retainer ring; 125-a first stop screw; 126-a first bearing; 127-an upper bearing cartridge; 1271-upper bearing box limit teeth; 1272-first crimp groove; 1273-a second stop screw hole; 1274-first keyway; 1275-first labyrinth seal groove; 128-upper labyrinth seal; 129-inner sleeve; 1210 shaft sleeve; 1211-guide bond; 13-gear shaft assembly; 131-a third bearing; 132-a gear; 133-hexagonal axis; 134-a connecting plate; 14-gear press plate; 141-a first annular protrusion; 15-a cylinder assembly; 151-hydraulic cylinder barrel; 1511-first square flange; 152-a hydraulic cylinder rod; 153-cylinder rod upper nut; 154-a mounting seat; 1541-a second square flange; 155-cylinder rod lower nut; 156-cotter pin; 16-a sliding sleeve assembly; 161-sliding sleeve; 1611-sliding sleeve guide key slot; 1612-rack transverse keyway; 1613-rack longitudinal keyway; 1614-a ring groove; 162-a lower bearing cartridge; 1621-lower bearing box limit teeth; 1622-a second gasket groove; 1623-a third stop screw hole; 1624-a second keyway; 1625-a second labyrinth seal groove; 1626-a second annular protrusion; 163-a second bearing; 164-a second limit screw; 165-a second hole retainer ring; 166-lower bearing retainer; 1661-lower bearing ring teeth; 1662-a fourth stop screw hole; 167-lower labyrinth seal cartridge; 168-a sliding sleeve hoop; 169-rack limit key; 17-a rack; 171-longitudinal keyway; 172-transverse bond; 2-internal blowout preventer; 21-hoop mounting grooves; 22-a switch shaft; 23-switching ball valve; 3-anti-rotation block.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-29, the present embodiment provides a top drive internal blowout preventer switchgear including a shutoff assembly 1, an internal blowout preventer 2, and an anti-rotation block 3.
The shutoff assembly 1 and the anti-rotation block 3 are both arranged outside the inner blowout preventer 2, and the shutoff assembly 1 is detachably sleeved outside the inner blowout preventer 2;
the inner blowout preventer 2 is provided with a switch ball valve 23, and the turn-off assembly 1 is used for turning on and off the switch ball valve 23 on the inner blowout preventer 2;
two ends of the inner blowout preventer 2 are respectively provided with an annular hoop mounting groove 21, the inner blowout preventer 2 is further provided with a switch shaft 22, an inner hole of the switch shaft 22 is hexagonal, and the switch shaft 22 and the switch ball valve 23 are connected together.
The shutoff assembly 1 comprises a shutoff body sleeved on the outer side of the inner blowout preventer 2 and a limiting component axially limiting the shutoff assembly 1 along the inner blowout preventer 2, the limiting component is connected with the inner blowout preventer 2, and specifically, the limiting component is hoop components 11 arranged at two ends of the shutoff body.
Furthermore, the limiting assembly can also adopt a screw, a key device and the like.
The shutoff body comprises an inner sleeve assembly 12, a gear shaft assembly 13, a gear pressure plate 14, an oil cylinder assembly 15, a sliding sleeve assembly 16 and a rack 17;
the hoop components 11 are two in number, are respectively located in the two hoop mounting grooves 21, and are fixed to the inner sleeve component 12 from top to bottom, the hoop components 11 comprise a left hoop 111 and a right hoop 112, and the left hoop 111 and the right hoop 112 are connected through bolts.
The inner sleeve assembly 12 comprises an upper bearing gland 121, a sealing ring 122, an upper bearing ring 123, a first limit screw 125, a first bearing 126, an upper bearing box 17, an upper labyrinth gland 128, an inner sleeve 129, a guide key 1211 and a shaft sleeve 1210;
the upper bearing gland 121 is fixed on the top of the inner sleeve 129 through a bolt;
the upper bearing pressing ring 123 is provided with six upper bearing pressing ring teeth 1231 which are uniformly arranged circumferentially and a first limiting screw hole 1232 which is symmetrically arranged front and back;
the upper bearing box 127 is provided with six upper bearing box limiting teeth 1271, first pressing ring grooves 1272, second limiting screw holes 1273 which are symmetrically arranged in front and back, first key grooves 1274 which are symmetrically arranged in left and right, and first labyrinth sealing grooves 1275 which are uniformly distributed on the circumference;
the inner ring of the first bearing 126 is arranged on the inner sleeve 129, and the outer ring of the first bearing 126 is arranged on the upper bearing box 127; the upper part of the inner ring of the first bearing 126 is pressed by the upper bearing gland 121, the upper bearing gland 121 is fixed on the inner sleeve 129 through bolts, the sealing ring 122 is arranged between the upper bearing gland 121 and the inner sleeve 129, and the lower part of the inner ring of the first bearing 126 is supported by the inner sleeve 129; the upper part of the outer ring of the first bearing 126 is pressed by an upper bearing ring 123, the upper bearing ring 123 is arranged in a first pressing ring groove 1272, and the upper bearing ring teeth 1231 are matched with the upper bearing box limiting teeth 1271 up and down to limit the upper bearing ring 123 to move up and down; the first limit screw 125 penetrates through the aligned first limit screw hole 1232 of the upper bearing ring 123 and the second limit screw hole 1273 of the upper bearing box 127, a first hole retainer ring 124 installed in the upper bearing box 127 is arranged above the first limit screw 125, and the first limit screw 125 limits the relative rotation between the upper bearing ring 123 and the upper bearing box 127;
the upper labyrinth seal cartridge 128 is mounted on the inner housing 129 and cooperates with the first labyrinth seal groove 1275; the guide keys 1211 are symmetrically arranged on the inner sleeve 129 front and back; the shaft sleeve 1210 is symmetrically arranged on the inner sleeve 129 left and right;
the number of the gear shaft assemblies 13 is two, the two gear shaft assemblies 13 are located in the switch shaft 22, each gear shaft assembly 13 comprises a third bearing 131, a gear 132, a hexagonal shaft 133 and a connecting plate 134, the front end and the rear end of the hexagonal shaft 133 are respectively provided with a hexagonal shaft end, the front end of the hexagonal shaft 133 penetrates through a hexagonal inner hole formed in the gear 132 and is coaxial with the gear 132, the connecting plate 134 is installed inside the gear 132, the screw pressing connecting plate 134 is connected with the hexagonal shaft 133, the third bearing 131 is installed in the gear 132 and is coaxial with the gear 132, and the lower part of the outer ring of the third bearing 131 is in contact with the connecting plate 134;
the hexagonal shaft 133 passes through the boss 1210 and is inserted into the hexagonal inner hole of the switch shaft 22.
The gear holder 14 is mounted on the inner housing 129, and the gear holder 14 is provided with a first annular protrusion 141, and the first annular protrusion 141 is inserted into and pressed against the third bearing 131.
The number of the oil cylinder assemblies 15 is two, each oil cylinder assembly 15 comprises a hydraulic cylinder barrel 151, a hydraulic cylinder rod 152, a cylinder rod upper nut 153, a mounting seat 154, a cylinder rod lower nut 155 and a split pin 156, the central axis of the hydraulic cylinder rod 152 is parallel to the central axis of the inner blowout preventer 2, and the two oil cylinder assemblies 15 are symmetrically distributed on the periphery of the inner blowout preventer 2;
a hydraulic cylinder rod 152 provided with threads penetrates through an installation seat 154, a cylinder rod upper nut 153 is installed on the upper portion of the installation seat 154, a cylinder rod lower nut 155 is installed on the lower portion of the installation seat 154, the threaded end of the hydraulic cylinder rod 152 penetrates through the installation cylinder rod upper nut 153, the installation seat 154 and the cylinder rod lower nut 155, and the end of the threaded end is leaked with a 30mm thread length allowance; the cylinder rod upper nut 153 and the cylinder rod lower nut 155 are fastened up and down to ensure that the relative positions of the hydraulic cylinder rod 152 and the mounting seat 154 transmit pulling force and pushing force simultaneously, the hydraulic cylinder barrel 151 is provided with a first square flange 1511 with a key, the mounting seat 154 is provided with a second square flange 1541 with a key, the cylinder rod lower nut 155 is in threaded connection with a threaded end of the hydraulic cylinder rod 152, and the split pin 156 penetrates through the lower part of the threaded end to limit the cylinder rod lower nut 155 and prevent the cylinder rod lower nut 155 from falling off from the threaded end.
The sliding sleeve assembly 16 comprises a sliding sleeve 161, a lower bearing box 162, a second bearing 163, a second limit screw 164, a second hole retainer ring 165, a lower bearing pressing ring 166, a lower labyrinth gland 167, a sliding sleeve hoop 168 and a rack limit key 169;
a sliding sleeve guide key slot 1611, a rack transverse key slot 1612, a rack longitudinal key slot 1613 and an annular groove 1614 are arranged on the sliding sleeve 161;
the lower bearing box 162 is provided with six lower bearing box limiting teeth 1621 which are uniformly arranged circumferentially, a second clamping ring groove 1622, third limiting screw holes 1623 which are symmetrically arranged front and back, and second key grooves 1624 which are symmetrically arranged left and right;
a second labyrinth seal groove 1625 is arranged at the upper part of the lower bearing box 162, and a second annular protrusion 1626 is arranged at the lower part of the lower bearing box 162;
the inner ring of the second bearing 163 is arranged on the sliding sleeve 161; the upper part of the inner ring of the second bearing 163 is pressed by the sliding sleeve 161, the lower part of the inner ring of the second bearing 163 is contacted with the lower labyrinth gland 167, the lower labyrinth gland 167 is contacted with the sliding sleeve hoop 168, and the sliding sleeve hoop 168 is arranged on the sliding sleeve 161; the outer ring of the second bearing 163 is arranged on the lower bearing box 162, the upper part of the outer ring of the second bearing 163 is contacted with the lower bearing box 162, and the lower part of the outer ring of the second bearing 163 is contacted with the lower bearing pressing ring 166; the lower bearing pressing ring 166 is arranged in the second pressing ring groove 1622, and the up-and-down matching between the lower bearing pressing ring teeth 1661 and the lower bearing box limiting teeth 1621 limits the up-and-down movement of the upper bearing pressing ring 123;
the second limit screw 164 passes through the aligned fourth limit screw hole 1662 of the lower bearing pressing ring 166 and the aligned third limit screw hole 1623 of the lower bearing box 162, a second hole retainer ring 165 mounted in the lower bearing box 162 is arranged above the second limit screw 164, and the second limit screw 164 limits the relative rotation between the lower bearing pressing ring 166 and the lower bearing box 162;
the lower bearing pressing ring 166 is provided with six lower bearing pressing ring teeth 1661 which are uniformly arranged circumferentially and a fourth limiting screw hole 1662 which is symmetrically arranged front and back;
the lower labyrinth seal sleeve 167 cooperates with the second labyrinth seal groove 1625 of the lower bearing box 162 to form a labyrinth seal; the annular groove 1614 of the sliding sleeve 161 cooperates with the second annular protrusion 1626 of the lower bearing cartridge 162 to form a labyrinth seal.
The first square flange 1511 of the hydraulic cylinder 151 is inserted into and fixed to the first key groove 1274 of the upper bearing cartridge 127; the second square flange 1541 of the mounting block 154 is inserted and fixed in the second key groove 1624 of the lower bearing housing 162.
The rack 17 is provided with a longitudinal key groove 171 and a transverse key 172, the transverse key 172 is inserted into the rack transverse key groove 1612, the rack limiting key 169 is inserted into the longitudinal key groove 171 and the rack longitudinal key groove 1613 and is fixedly connected with the sliding sleeve 161, and the rack 17 is connected with the sliding sleeve 161 through a screw; the rack 17 forms a rack and pinion engagement with the gear 132.
The stop block of the anti-rotation block 3 blocks the first square flange 1511 of the hydraulic cylinder 151 to prevent the oil cylinder assembly 15 from rotating, and the relative rotation of the oil cylinder assembly 15 and the sliding sleeve assembly 16 relative to the top drive is limited; the guide key 1211 of the inner sleeve assembly 12 is inserted into the slide sleeve guide slot 1611 of the slide sleeve 161 to limit the relative rotation between the inner sleeve assembly 12 and the slide sleeve assembly 16.
And/or, the anti-rotation block 3 is arranged at the lower part of the oil cylinder assembly 15 and prevents the oil cylinder assembly 15 from rotating by blocking the mounting seat 154;
when the internal blowout preventer switching device needs to be turned off, the hydraulic cylinder rod 152 retracts to drive the sliding sleeve assembly 16 to move upwards, the sliding sleeve assembly 16 drives the rack 17 to move upwards, the rack 17 drives the gear 132 of the gear shaft assembly 13 to rotate clockwise, the hexagonal shaft 133 in the gear shaft assembly 13 drives the switching shaft 22 of the internal blowout preventer 2 to rotate, and then the switching ball valve 23 is driven to rotate to close a slurry channel;
when the internal blowout preventer switching device needs to be opened, the hydraulic cylinder rod 152 extends out to drive the sliding sleeve assembly 16 to move downwards, the sliding sleeve assembly 16 drives the rack 17 to move downwards, the rack 17 drives the gear 132 of the gear shaft assembly 13 to rotate anticlockwise, and the hexagonal shaft 133 in the gear shaft assembly 13 drives the switch shaft 22 of the internal blowout preventer 2 to rotate, so that the switch ball valve 23 is driven to rotate to open a slurry channel.
The beneficial effect of the internal blowout preventer switching device is driven on top that this embodiment provided lies in:
the shutoff assembly 1 and the internal blowout preventer 2 are detachably mounted together, and a mounting position does not need to be reserved at the beginning of top drive design, so that the mounting is more convenient;
in the process of turning off and turning on the internal blowout preventer switching device, the inner sleeve component 12 does not move, the hydraulic cylinder 151 does not move, the purpose of turning off and turning on the internal blowout preventer can be achieved only by the movement of the sliding sleeve component 16, the additional torque of relative rotation is eliminated by the key connection arranged between the inner sleeve component 12 and the sliding sleeve component 16, the load on the switch ball valve 23 is further reduced, the service life of the internal blowout preventer 2 is prolonged, meanwhile, the accuracy of the stroke can be ensured only by adjusting the upper cylinder rod nut 153 and the lower cylinder rod nut 155, and the operation is more convenient in comparison;
in the opening and closing processes of the internal blowout preventer switching device, the gear 132 is in a rotating state, and because the gear pressing plate 14 presses the gear shaft assembly 13 and is connected through the third bearing 131 of the gear shaft assembly 13, the friction is the rolling friction of the bearings, so that the abrasion of the hexagonal shaft 133 of the gear shaft assembly 13 is reduced to the maximum extent;
when the internal blowout preventer 2 rotates, because the bearings are arranged in the inner sleeve assembly 12 and the sliding sleeve assembly 16, and the inner ring and the outer ring of the bearing can rotate relatively, the inner rings of the inner sleeve assembly 12 and the sliding sleeve assembly 16 can rotate along with the top-driven internal blowout preventer 2, the outer rings of the inner sleeve assembly 12 and the sliding sleeve assembly 16 are relatively static relative to the anti-rotation block 3, and meanwhile, the labyrinth seal in the inner sleeve assembly 12 and the labyrinth seal of the sliding sleeve assembly 16 realize the sealing of the bearing and cancel the rubber sealing element, thereby avoiding the sealing failure of the rubber element to the greatest extent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (17)
1. A top drive internal blowout preventer switching device comprises an internal blowout preventer (2), wherein a switch ball valve (23) is arranged on the internal blowout preventer (2), and the top drive internal blowout preventer switching device is characterized by further comprising a switching-off assembly (1) for switching on and off the switch ball valve (23) on the internal blowout preventer (2), wherein the switching-off assembly (1) is detachably sleeved and connected to the outer side of the internal blowout preventer (2);
the shut-off assembly (1) comprises a shut-off body sleeved outside the inner blowout preventer (2) and a limiting assembly for axially limiting the shut-off assembly (1) along the inner blowout preventer (2), and the limiting assembly is connected with the inner blowout preventer (2);
the shutoff body comprises an inner sleeve assembly (12), a gear shaft assembly (13) and a sliding sleeve assembly (16);
the inner sleeve component (12) is sleeved on the outer side of the inner blowout preventer (2), and the limiting component axially limits the inner sleeve component (12) along the inner blowout preventer (2);
the sliding sleeve assembly (16) is sleeved outside the inner sleeve assembly (12) and can axially reciprocate relative to the inner sleeve assembly (12) along the inner blowout preventer (2);
the gear shaft assembly (13) can switch on or off the switch ball valve (23);
the turn-off body further comprises two gear pressing plates (14), the gear pressing plates (14) are installed in the inner sleeve assembly (12), and the gear pressing plates (14) are connected with the gear shaft assembly (13);
the inner sleeve assembly (12) comprises an upper bearing pressure cover (121), a sealing ring (122), an upper bearing pressure ring (123), a first limit screw (125), a first bearing (126), an upper bearing box (127), an upper labyrinth seal sleeve (128) and an inner sleeve (129), the upper bearing pressure ring (123) is installed in a pressure ring groove (1272) of the upper bearing box (127), the upper bearing pressure cover (121) is fixedly connected with the inner sleeve (129), the sealing ring (122) is located between the upper bearing pressure cover (121) and the inner sleeve (129), the inner ring of the first bearing (126) is installed on the inner sleeve (129), and the outer ring of the first bearing (126) is installed on the upper bearing box (127);
the upper labyrinth seal cartridge (128) is mounted on the inner sleeve (129) and cooperates with a first labyrinth seal groove (1275) of the upper bearing cartridge (127);
the first limiting screw (125) penetrates through a first limiting screw hole (1232) of the upper bearing pressing ring (123) and a second limiting screw hole (1273) of the upper bearing box (127), a first hole retaining ring (124) is arranged above the first limiting screw (125), and the first hole retaining ring (124) is installed in the upper bearing box (127);
the gear pressing plate (14) is arranged on the inner sleeve (129).
2. A top drive internal blowout preventer switchgear according to claim 1, wherein the shut off body further comprises a cylinder assembly (15) and a rack (17);
one end of the oil cylinder assembly (15) is connected with the sliding sleeve assembly (16), and the other end of the oil cylinder assembly is connected with one end, far away from the sliding sleeve assembly (16), of the inner sleeve assembly (12);
the rack (17) is arranged on the sliding sleeve assembly (16);
the gear shaft assembly (13) is meshed with the rack (17).
3. A top drive internal blowout preventer switching device according to claim 2, wherein the inner sleeve assembly (12) is provided with a guide key (1211), the sliding sleeve assembly (16) is correspondingly provided with a sliding sleeve guide key slot (1611), the guide key (1211) is located in the sliding sleeve guide key slot (1611), and the guide key (1211) is in sliding fit with the sliding sleeve guide key slot (1611) along the axial direction of the internal blowout preventer (2).
4. A top drive internal blow out preventer switchgear according to claim 2, characterized in that the internal blow out preventer (2) is further provided with a switch shaft (22), the switch shaft (22) being in driving connection with the switch ball valve (23), the gear shaft assembly (13) being in driving connection with the switch shaft (22).
5. A top drive internal blow out preventer switch gear according to claim 4, characterized in that the gear shaft assembly (13) comprises a third bearing (131), a gear (132), a hexagonal shaft (133) and a web (134), the third bearing (131) being mounted within the gear (132) and coaxial with the gear (132), the web (134) being connected to the hexagonal shaft (133), the hexagonal shaft (133) being located in the switch shaft (22), a lower part of the outer ring of the third bearing (131) being in contact with the web (134), the rack (17) forming a rack and pinion fit with the gear (132).
6. A top drive internal blow out preventer switch arrangement according to claim 5, characterized in that the inner housing assembly (12) comprises a bushing (1210), both ends of the hexagonal shaft (133) are provided with hexagonal shaft ends, one end of the hexagonal shaft (133) is mounted through the bushing (1210) in the switch shaft (22), and the other end of the hexagonal shaft (133) is mounted in a hexagonal bore of the gear wheel (132) and is coaxial with the gear wheel (132).
7. A top drive internal blow out preventer switch gear according to claim 3, characterized in that the cylinder assembly (15) comprises a cylinder rod (152), a cylinder bore (151) and a mounting seat (154), one end of the cylinder rod (152) being connected to the sliding sleeve assembly (16) via the mounting seat (154), the other end of the cylinder rod (152) being connected to the inner housing assembly (12) via the cylinder bore (151).
8. A top drive internal blowout preventer switch apparatus according to claim 7, wherein the end of the hydraulic cylinder rod (152) connected to the mounting seat (154) is provided with a screw thread, the upper and lower parts of the mounting seat (154) are provided with a cylinder rod upper nut (153) and a cylinder rod lower nut (155), respectively, the threaded end of the hydraulic cylinder rod (152) passes through the mounting seat (154), and the end of the threaded end protrudes out of the mounting seat (154), and the threaded end is in threaded connection with the cylinder rod lower nut (155).
9. A top drive internal blowout preventer switch apparatus according to claim 5, wherein the gear pressure plate (14) is provided with a first annular projection (141), the first annular projection (141) being located within the third bearing (131) and abutting the third bearing (131).
10. A top drive internal blowout preventer switching apparatus according to claim 7, wherein the upper bearing retainer ring (123) is provided with upper bearing ring teeth (1231), the upper bearing cartridge (127) is provided with upper bearing cartridge limit teeth (1271), and the upper bearing ring teeth (1231) and the upper bearing cartridge limit teeth (1271) cooperate.
11. A top drive internal blow out preventer switchgear as claimed in claim 10, wherein the upper bearing cartridge (127) is provided with a first keyway (1274), and the hydraulic cylinder (151) is provided with a first square flange (1511), the first square flange (1511) cooperating with the first keyway (1274).
12. A top drive internal blowout preventer switchgear according to claim 8, wherein the sliding sleeve assembly (16) comprises a sliding sleeve (161), a lower bearing cartridge (162), a second bearing (163), a lower bearing retainer ring (166), a lower labyrinth seal (167) and a sliding sleeve hoop (168), wherein an inner race of the second bearing (163) is mounted on the sliding sleeve (161), an upper portion of the inner race of the second bearing (163) is compressed by the sliding sleeve (161), a lower portion of the inner race of the second bearing (163) is in contact with the lower labyrinth seal (167), the sliding sleeve hoop (168) is mounted on the sliding sleeve (161), and the lower labyrinth seal (167) is in contact with the sliding sleeve hoop (168);
the outer ring of the second bearing (163) is mounted on the lower bearing box (162), the upper part of the outer ring of the second bearing (163) is in contact with the lower bearing box (162), the lower bearing retainer (166) is mounted in a second retainer groove (1622) of the lower bearing box (162), the lower bearing retainer teeth (1661) of the lower bearing retainer (166) are matched with the lower bearing box limit teeth (1621) of the lower bearing box (162), and the lower part of the outer ring of the second bearing (163) is in contact with the lower bearing retainer (166);
the lower labyrinth sealing sleeve (167) is matched with a second labyrinth sealing groove (1625) of the lower bearing box (162) to form labyrinth sealing, and an annular groove (1614) of the sliding sleeve (161) is matched with a second annular protrusion (1626) of the lower bearing box (162) to form labyrinth sealing;
the sliding sleeve guide key slot (1611) is positioned in the sliding sleeve (161).
13. A top drive internal blowout preventer switchgear according to claim 12, wherein the sliding sleeve assembly (16) further comprises a second limit screw (164), the second limit screw (164) passing through a fourth limit screw hole (1662) of the lower bearing retainer ring (166) and a third limit screw hole (1623) of the lower bearing cartridge (162), and a second hole retainer ring (165) mounted on the lower bearing cartridge (162) is provided above the second limit screw (164).
14. A top drive internal blowout preventer switchgear according to claim 12, wherein the lower bearing cartridge (162) is provided with a second keyway (1624), and the mounting block (154) is provided with a second square flange (1541), the second square flange (1541) cooperating with the second keyway (1624).
15. A top drive internal blowout preventer switchgear according to claim 12, wherein the rack (17) is provided with a longitudinal keyway (171) and a transverse key (172), the transverse key (172) is inserted into a rack transverse keyway (1612) of the sliding sleeve (161), the sliding sleeve assembly (16) further comprises a rack limiting key (169), the rack limiting key (169) is inserted into the longitudinal keyway (171) and a rack longitudinal keyway (1613) of the sliding sleeve (161) and is fixedly connected with the sliding sleeve (161), and the rack (17) is connected with the sliding sleeve (161) by a screw.
16. A top drive internal blow out preventer switch gear according to claim 11, further comprising an anti-rotation block (3), the anti-rotation block (3) being arranged outside the internal blow out preventer (2), the anti-rotation block (3) being adapted to block the first square flange (1511) against rotation of the cylinder assembly (15);
and/or the presence of a gas in the gas,
the anti-rotation block (3) is arranged below the oil cylinder assembly (15) and used for blocking the mounting seat (154) to prevent the oil cylinder assembly (15) from rotating.
17. A top drive internal blow out preventer switchgear according to claim 1, wherein the stop assembly comprises hoop assemblies (11) arranged at both ends of the shut off body, the hoop assemblies (11) being connected to the internal blow out preventer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110091283.5A CN112943149B (en) | 2021-01-22 | 2021-01-22 | Top drive internal blowout preventer switching device |
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| CN202110091283.5A CN112943149B (en) | 2021-01-22 | 2021-01-22 | Top drive internal blowout preventer switching device |
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| CN112943149A CN112943149A (en) | 2021-06-11 |
| CN112943149B true CN112943149B (en) | 2022-05-03 |
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| CN202110091283.5A Active CN112943149B (en) | 2021-01-22 | 2021-01-22 | Top drive internal blowout preventer switching device |
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| CN116241209B (en) * | 2023-05-09 | 2023-07-21 | 成都添盛钻采设备有限公司 | Compact rotary blowout preventer |
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