CN114320162A

CN114320162A - Roller bit with automatic oil injection function for petroleum drilling

Info

Publication number: CN114320162A
Application number: CN202210069923.7A
Authority: CN
Inventors: 徐文飞
Original assignee: Individual
Current assignee: Haotong Xi'an Enterprise Management Partnership Enterprise LP
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-04-12
Anticipated expiration: 2042-01-21
Also published as: CN114320162B

Abstract

The invention relates to the field of petroleum drilling, in particular to a roller bit with an automatic oil injection function for petroleum drilling. The technical problem is as follows: when the drilling fluid around the pressure guide hole is inconsistent with the rotation direction of the drill bit, and rock debris in the drilling fluid blocks the pressure guide hole, the pressure in the oil storage bag cannot meet the requirement of oil injection, so that the bearing cannot be injected with oil, and the bearing is damaged or even the cone falls off. The implementation scheme is as follows: a roller bit with automatic oil injection function for petroleum drilling comprises a mounting frame, an idle rotation prevention rotating mechanism, a lubricating oil adherence prevention mechanism and the like; the mounting bracket is in threaded connection with the external drill rod, the idle rotation preventing rotating mechanism is located on the lower portion of the mounting bracket, and the lubricating oil adherence preventing mechanism is located inside the idle rotation preventing rotating mechanism. The anti-idle rotation rotating mechanism is arranged, so that the device can automatically control lubricating grease in the oil storage cavity to lubricate the gear; through setting up the wall-sticking prevention mechanism of lubricating oil, prevent that lubricating oil from pasting tight oil storage intracavity wall, make lubricating oil can't get into the bearing, lubricate the bearing.

Description

Roller bit with automatic oil injection function for petroleum drilling

Technical Field

The invention relates to the field of petroleum drilling, in particular to a roller bit with an automatic oil injection function for petroleum drilling.

Background

The roller bit is the most widely used drilling bit in petroleum drilling, wherein the roller bit is the most widely used, when a drill pipe drives the roller bit to rotate, a roller rotates relative to a bit leg after a roller and a medium rub against each other, and because the drilling speed is very high during drilling, the speed of the medium rubbed by the roller bit is fast, and lubricating oil on a bearing in the roller bit can be consumed quickly.

The existing roller bit is internally provided with an oil storage bag, when oil is injected, the oil storage bag is enough in pressure in an oil cavity and is expanded, when the roller bit drills a well, the oil storage bag automatically supplements lubricating oil for a bearing system of the roller bit by means of self return elasticity, so that a bearing of the bit is sufficiently lubricated during working, because a pressure leading hole is formed in the outer side of the roller bit, when drilling fluid around the pressure leading hole is inconsistent with the rotation direction of the bit, rock debris in the drilling fluid blocks the pressure leading hole, the pressure in the oil storage bag cannot meet the requirement of oil injection, the bearing cannot be injected with oil, and the bearing is damaged or even falls off.

Therefore, the roller bit with the automatic oil injection function for the oil drilling is provided.

Disclosure of Invention

When the drilling fluid and the drill bit direction of rotation around the pressure hole were inconsistent in order to overcome, when the detritus in the drilling fluid blockked up the pressure hole, the requirement of oiling can not be reached to the pressure in the oil storage bag, can't carry out the oiling to the bearing, caused the bearing to damage the shortcoming that the cone fell even, the technical problem that solve is: provides a roller bit with automatic oil injection function for petroleum drilling.

The technical scheme of the invention is as follows: a roller bit with an automatic oil injection function for petroleum drilling comprises a mounting frame, a rotary shell, first fixing frames, liquid outlet pipes, a roller, an idle rotation preventing rotary mechanism, a lubricating oil adherence preventing mechanism and an excessive torque preventing mechanism, wherein the mounting frame is in threaded connection with an external drill rod, a pipeline for conveying drilling fluid is arranged inside the mounting frame, a stepped annular groove is formed in the lower portion of the mounting frame, the upper end of the rotary shell is provided with a stepped annular protrusion, the rotary shell is in sliding connection with the lower portion of the mounting frame, the mounting frame is in sliding connection with the rotary shell to form a cavity, three first fixing frames are fixedly connected to the lower portion of the rotary shell in the circumferential direction, three liquid outlet pipes are circumferentially embedded to the lower portion of the rotary shell, the lower end of each first fixing frame is rotatably connected with the roller, the idle rotation preventing rotary mechanism is in sliding connection with the rotary shell, and the lubricating oil adherence preventing mechanism is fixedly connected to the inside the idle rotation preventing rotary mechanism, the anti-torque overlarge mechanism is positioned inside the anti-idle rotation rotating mechanism, and the anti-torque overlarge mechanism is positioned above the anti-lubricating oil adherence mechanism.

Further, the idle rotation preventing rotating mechanism comprises two trapezoid blocks, a buffer frame, a rotating sleeve, three rotating blocks, a first fixing rod, a well conveying pipe and an automatic oil outlet assembly, the two trapezoid blocks are fixedly connected to the lower portion of the mounting frame and symmetrically arranged, the buffer frame is fixedly connected to the inner wall of the rotating shell, three pipelines are arranged inside the buffer frame, hydraulic oil is arranged inside the pipelines, the rotating sleeve is slidably connected to the inside of the buffer frame, three holes are formed in the upper portion of the rotating sleeve, two grooves are formed in the upper surface of the rotating sleeve, the size of the two grooves is the same as that of the trapezoid blocks, the number of the rotating blocks is three, the three rotating blocks are circumferentially and fixedly connected to the lower portion of the rotating sleeve, the rotating sleeve and the rotating blocks are driven to rotate through the mounting frame, the device can drive three gear wheels to rotate to drill a well, the first fixing rod is fixedly connected to the lower end of the rotating sleeve, the first fixing rod is arranged in a spline, the liquid outlet is embedded with the well conveying pipe, the automatic oil outlet assembly is positioned in the rotating shell and fixedly connected to the lower part of the buffer frame.

Further, automatic oil outlet assembly is including the oil storage chamber, first spring, the slider, defeated oil pipe and bearing, oil storage chamber rigid coupling in the inside upper surface of runing casing, first spring lower extreme rigid coupling in the inside upper surface of runing casing, first spring is located oil storage intracavity portion, slider sliding connection is in oil storage intracavity portion, extrude slider downstream through first dead lever, make this device only at the during operation, just can annotate lubricating oil to three gear wheel, first spring upper end rigid coupling in slider lower surface, first mount is embedded to have defeated oil pipe, defeated oil pipe upper end communicates in the oil storage chamber, the bearing is installed to first mount lower extreme, be connected with the gear wheel on the bearing, defeated well drilling liquid pipe communicates in the upper portion trompil hole department of rotating sleeve.

Furthermore, the size of the upper hole of the rotating sleeve is consistent with the inner diameter of the drilling fluid conveying pipe.

Furthermore, the mechanism for preventing the lubricating oil from adhering to the wall comprises four second springs, an oil squeezing plate, four second fixing rods, four tension springs, sliding blocks and a lubricating oil stirring assembly, wherein the number of the second springs is four, the upper ends of the four second springs are fixedly connected to the upper surface inside the oil storage cavity, the oil squeezing plate is fixedly connected to the lower ends of the four second springs, annular grooves are formed in the oil squeezing plate, the lubricating oil is prevented from entering an oil conveying pipe under the action of centrifugal force when the lubricating oil is reduced due to the squeezing action of the four second springs by the oil squeezing plate, the four second fixing rods are circumferentially and fixedly connected to the oil squeezing plate, the four tension springs are respectively sleeved on the four second fixing rods, one ends of the four tension springs are fixedly connected to the oil squeezing plate, the four sliding blocks are respectively connected to the four second fixing rods in a sliding mode, and the other ends of the four tension springs are respectively fixedly connected to the four sliding blocks, the lubricating oil stirring component is fixedly connected inside the oil storage cavity.

Further, lubricating oil stirring subassembly is including the second mount, the third dead lever, first bevel gear, second bevel gear, third bevel gear and stirring piece, second mount rigid coupling is in crowded oiled-plate top, the third dead lever rotates to be connected in the lower part of second mount, the rigid coupling has first bevel gear on the third dead lever, second bevel gear rotates to be connected in the upper portion of second mount, second bevel gear sliding connection is in first dead lever, second bevel gear and first bevel gear meshing, third bevel gear rotates to be connected in crowded oiled-plate, third bevel gear and first bevel gear meshing, stirring piece rigid coupling is in third bevel gear lower extreme, rotate through the stirring piece, can't well get into three cone after preventing the lubricating oil caking.

Further, the stirring piece is set to be in a cross shape, four outer end faces of the lower surface of the stirring piece are all set to be inclined faces gradually changing towards the central point of the stirring piece, and the four outer end faces of the stirring piece are set to be baffle portions.

Further, prevent too big mechanism of moment of torsion is including first slide bar, third spring and stripper plate, first slide bar is equipped with threely, three first slide bar sliding connection is in the inside three pipeline of buffer frame, extrude first slide bar through the turning block, instantaneous moment of torsion when reducing this device and starting, first slide bar both ends are overlapped respectively and are equipped with a third spring, the one end rigid coupling of third spring in first slide bar, the other end rigid coupling of third spring in buffer frame, first slide bar middle part rigid coupling has the stripper plate.

Further, the anti-drilling scrap blocking mechanism comprises a third fixing frame, a second sliding rod, a fourth spring, an anti-blocking block, a first toothed plate, a fourth fixing rod, a straight gear and a second toothed plate, wherein the third fixing frame is fixedly connected inside the liquid outlet pipe, the middle part of the third fixing frame is slidably connected with the second sliding rod, the upper part of the second sliding rod is sleeved with the fourth spring, the lower end of the fourth spring is fixedly connected to the upper surface of the third fixing frame, the upper end of the fourth spring is fixedly connected to the second sliding rod, the lower end of the second sliding rod is rotatably connected with the anti-blocking block, the liquid outlet pipe is prevented from being blocked by rock scraps through movement of the anti-blocking block, the upper end of the second sliding rod is fixedly connected with the first toothed plate, the fourth fixing rod is fixedly connected inside the liquid outlet pipe, the fourth fixing rod is rotatably connected with the straight gear, the straight gear is meshed with the first toothed plate, the inner part of the liquid outlet pipe is slidably connected with the second toothed plate, and the second toothed plate is positioned at the lower side of the fourth fixing rod, the second toothed plate is meshed with the spur gear.

Furthermore, a plurality of convex blocks are arranged on the conical surface of the anti-blocking block, and the convex blocks are semicircular.

Compared with the prior art, the invention has the following advantages: the anti-idle rotation rotating mechanism is arranged, so that the device can automatically control lubricating grease in the oil storage cavity to lubricate the gear; by arranging the lubricating oil adherence preventing mechanism, the lubricating oil is prevented from clinging to the inner wall of the oil storage cavity, so that the lubricating oil cannot enter the bearing to lubricate the bearing; by arranging the over-large torque prevention mechanism, the over-large torque of the device during instant starting is avoided, and the torque during instant starting is prevented from damaging the device; through setting up and preventing that bore bits blocks up mechanism, avoid the gear wheel when rotating broken rock, the rock bits that fall into in the drilling fluid block up the drain pipe, cause this device drilling fluid can not circulate when the well drilling, and this device temperature risees, causes this device to damage.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a first cross-sectional view of the anti-lost motion rotary mechanism of the present invention.

Fig. 3 is an enlarged perspective view of the present invention at a.

Fig. 4 is a second cross-sectional view of the anti-lost motion rotary mechanism of the present invention.

Fig. 5 is a third cross-sectional view of the anti-lost motion rotary mechanism of the present invention.

FIG. 6 is a first cross-sectional view of the anti-adhesion mechanism of lubricating oil of the present invention.

FIG. 7 is a second cross-sectional view of the anti-lube adherence mechanism of the present invention.

FIG. 8 is a third cross-sectional view of the anti-lube adherence mechanism of the present invention.

Fig. 9 is a schematic perspective view of a first structure of the mechanism for preventing lubricant from adhering to the wall according to the present invention.

Fig. 10 is a schematic perspective view of a second structure of the lubricating oil adherence preventing mechanism of the present invention.

Fig. 11 is a cross-sectional view of the over-torque prevention mechanism of the present invention.

Fig. 12 is an enlarged perspective view of the present invention at B.

Fig. 13 is a partial perspective view of the anti-torque mechanism of the present invention.

Fig. 14 is a schematic perspective view of a first anti-drill-chip blocking mechanism according to the present invention.

Fig. 15 is a schematic perspective view of a second anti-drill-chip blocking mechanism according to the present invention.

FIG. 16 is a cross-sectional view of the anti-drill-chip blocking mechanism of the present invention.

Wherein the figures include the following reference numerals: 101-a mounting rack, 102-a rotating shell, 103-a first fixing rack, 104-a liquid outlet pipe, 105-a cone, 201-a trapezoidal block, 202-a buffer rack, 203-a rotating sleeve, 204-a rotating block, 205-a first fixing rod, 206-an oil storage cavity, 207-a first spring, 208-a sliding part, 209-an oil conveying pipe, 210-a bearing, 211-a drilling fluid conveying pipe, 301-a second spring, 302-an oil squeezing plate, 303-a second fixing rod, 304-a tension spring, 305-a sliding block, 306-a second fixing rack, 307-a third fixing rod, 308-a first bevel gear, 309-a second bevel gear, 310-a third bevel gear, 311-a stirring part, 311a baffle part, 401-a first sliding rod, 402-a third spring, 403-extrusion plate, 501-third fixing frame, 502-second sliding rod, 503-fourth spring, 504-anti-blocking block, 505-first toothed plate, 506-fourth fixing rod, 507-spur gear and 508-second toothed plate.

Detailed Description

Although the present invention may be described with respect to particular applications or industries, those skilled in the art will recognize the broader applicability of the invention. Those of ordinary skill in the art will recognize other factors such as: terms such as above, below, upward, downward, and the like are used to describe the accompanying drawings and are not meant to limit the scope of the invention, which is defined by the appended claims. Such as: any numerical designation of first or second, and the like, is merely exemplary and is not intended to limit the scope of the invention in any way.

Example 1

A roller bit with an automatic oil injection function for petroleum drilling is disclosed, as shown in FIGS. 1-13, and comprises a mounting frame 101, a rotary shell 102, first fixing frames 103, liquid outlet pipes 104, a roller 105, an idle rotation prevention rotary mechanism, an anti-lubricating oil adherence mechanism and an excessive torque prevention mechanism, wherein the mounting frame 101 is in threaded connection with an external drill rod, a pipeline for conveying drilling fluid is arranged inside the mounting frame 101, a stepped annular groove is formed in the lower part of the mounting frame 101, the upper end of the rotary shell 102 is provided with a stepped annular protrusion, the rotary shell 102 is slidably connected to the lower part of the mounting frame 101, the mounting frame 101 is in sliding connection and matching with the rotary shell 102 to form a cavity, three first fixing frames 103 are fixedly connected to the lower part of the rotary shell 102 in the circumferential direction, three liquid outlet pipes 104 are arranged, the three liquid outlet pipes 104 are circumferentially embedded in the lower part of the rotary shell 102, the lower end of the first fixing frame 103 is rotatably connected with the roller 105, and the idle rotation prevention rotary mechanism is slidably connected to the rotary shell 102, the anti-lubricating oil adherence mechanism is fixedly connected inside the anti-idling rotating mechanism, the anti-torque overlarge mechanism is located above the anti-lubricating oil adherence mechanism, and the anti-idling rotating mechanism, the anti-lubricating oil adherence mechanism and the anti-torque overlarge mechanism are arranged and used for controlling the device to automatically inject lubricating oil into the three cones 105, controlling the flow of drilling fluid and slowing down the instantaneous speed of the device during starting.

When the device works, a worker installs the mounting frame 101 on an external drill rod, the drill rod drives the device to move downwards, when the device moves to the roller 105 and cannot move downwards, the drill rod drives the mounting frame 101 to continue moving downwards, when the mounting frame 101 moves downwards to contact with the upper surface of the rotary shell 102, the drill rod starts to rotate clockwise, the drill rod drives the mounting frame 101 to rotate clockwise, the mounting frame 101 drives the idle rotation prevention rotating mechanism to rotate clockwise, the idle rotation prevention rotating mechanism extrudes the idle rotation prevention overlarge mechanism when rotating clockwise, the idle rotation prevention overlarge mechanism is extruded and started by the idle rotation prevention rotating mechanism, the idle rotation prevention overlarge mechanism is used for preventing the device from being damaged due to overlarge torque when the drill rod drives the mounting frame 101 to rotate clockwise, the idle rotation prevention rotating mechanism drives the rotary shell 102 to rotate clockwise, the rotary shell 102 drives the three first fixing frames 103, the three liquid outlet pipes 104 and the three roller 105 to rotate clockwise, drilling fluid is sprayed out from the liquid outlet pipe 104, the three cones 105 crush rocks below the well to deepen the well, when a worker stops a drill rod, the rotating speed of the drill rod is slowed down under the action of inertia, after the speed of the drill rod is slowed down, the rotating speed of the mounting frame 101 driven by the three cones 105 is slowed down, the idle rotation preventing rotating mechanism extrudes the idle rotation preventing mechanism in the opposite direction, the idle rotation preventing mechanism prevents the rotating speed of the rotating shell 102 from being inconsistent with that of the idle rotation preventing mechanism, the device is damaged, the idle rotation preventing mechanism decelerates the rotating shell 102, after the clockwise rotating speed of the rotating shell 102 is slowed down, the clockwise rotating speeds of the three first fixing frames 103, the three liquid outlet pipes 104 and the three cones 105 are slowed down, until the device stops rotating, the drill rod drives the mounting frame 101 to move upwards, and when the mounting frame 101 moves upwards to an initial position, the anti-idling rotating mechanism moves upwards to reset, the operation is finished until the operation of the drill rod is started next time, the steps are repeated, if a worker forgets to stop the drill rod, the mounting frame 101 rotates after moving upwards, at the moment, the mounting frame 101 does not drive the anti-idling rotating mechanism to rotate any more, the drilling fluid does not enter the liquid outlet pipe 104, and the drilling fluid is gathered in a cavity formed by the mounting frame 101 and the rotating shell 102 to cool the mounting frame 101 which rotates all the time until the worker finds the drilling fluid.

Example 2

On the basis of embodiment 1, as shown in fig. 2-3, the idle rotation preventing rotating mechanism includes two trapezoidal blocks 201, a buffer frame 202, a rotating sleeve 203, a rotating block 204, a first fixing rod 205, a drilling fluid delivery pipe 211 and an automatic oil outlet assembly, the two trapezoidal blocks 201 are fixedly connected to the lower portion of the mounting frame 101, the two trapezoidal blocks 201 are symmetrically arranged, the buffer frame 202 is fixedly connected to the inner wall of the rotating housing 102, three pipelines are arranged inside the buffer frame 202, hydraulic oil is arranged inside the pipelines, the rotating sleeve 203 is slidably connected to the inside of the buffer frame 202, three holes are arranged on the upper portion of the rotating sleeve 203, two grooves are arranged on the upper surface of the rotating sleeve 203, the two grooves have the same size as the trapezoidal blocks 201, the three rotating blocks 204 are circumferentially fixedly connected to the lower portion of the rotating sleeve 203, the first fixing rod 205 is fixedly connected to the lower end of the rotating sleeve 203, the first fixing rod 205 is provided with a spline, a drilling fluid conveying pipe 211 is embedded in the liquid outlet pipe 104, the automatic oil outlet assembly is fixedly connected to the inside of the rotary shell 102 and located on the lower portion of the buffer frame 202, and the mounting frame 101 drives the rotary sleeve 203 and the rotary block 204 to rotate, so that the device drives the three cones 105 to rotate to perform drilling work.

As shown in fig. 2-5, the automatic oil discharging assembly includes an oil storage cavity 206, a first spring 207, a sliding element 208, an oil pipe 209 and a bearing 210, the oil storage cavity 206 is fixedly connected to the upper surface inside the rotary housing 102, the lower end of the first spring 207 is fixedly connected to the upper surface inside the rotary housing 102, the first spring 207 is located inside the oil storage cavity 206, the sliding element 208 is slidably connected to the inside of the oil storage cavity 206, the upper end of the first spring 207 is fixedly connected to the lower surface of the sliding element 208, the oil pipe 209 is embedded in the first fixing frame 103, the upper end of the oil pipe 209 is communicated with the oil storage cavity 206, the bearing 210 is installed at the lower end of the first fixing frame 103, the bearing 210 is connected with the cone 105, the drilling fluid pipe 211 is communicated with the upper opening of the rotary sleeve 203, the upper opening of the rotary sleeve 203 is in accordance with the inner diameter of the drilling fluid pipe 211, the sliding element 208 is pressed by the first fixing rod 205 to move downwards, so that the lubricating oil is injected into the three roller cones 105 when the device works.

As shown in fig. 6-7, the mechanism for preventing the lubricant from adhering to the wall comprises four second springs 301, four oil squeezing plates 302, four second fixing rods 303, four tension springs 304, four sliding blocks 305 and a lubricant stirring component, wherein the four second springs 301 are provided, the upper ends of the four second springs 301 are fixedly connected to the upper surface of the interior of the oil storage cavity 206, the oil squeezing plates 302 are fixedly connected to the lower ends of the four second springs 301, the oil squeezing plates 302 are provided with annular grooves, the number of the second fixing rods 303 is four, the four second fixing rods 303 are circumferentially fixedly connected to the oil squeezing plates 302, the four tension springs 304 are provided with four, the four tension springs 304 are respectively sleeved on the four second fixing rods 303, one ends of the four tension springs 304 are fixedly connected to the oil squeezing plates 302, the sliding blocks 305 are provided with four sliding blocks 305, the four sliding blocks 305 are respectively slidably connected to the four second fixing rods 303, the other ends of the four tension springs 304 are respectively fixedly connected to the four sliding blocks 305, the lubricant stirring component is fixedly connected to the interior of the oil storage cavity 206, by the pressing action of the four second springs 301 on the oil pressing plate 302, it is prevented that the lubricating oil is not fed into the oil delivery pipe 209 any more by centrifugal force when the lubricating oil is reduced.

As shown in fig. 8-10, the lubricating oil stirring assembly includes a second fixing frame 306, a third fixing rod 307, a first bevel gear 308, a second bevel gear 309, a third bevel gear 310 and a stirring member 311, the second fixing frame 306 is fixedly connected to the upper end of the oil squeezing plate 302, the third fixing rod 307 is rotatably connected to the lower portion of the second fixing frame 306, the third fixing rod 307 is fixedly connected to the first bevel gear 308, the second bevel gear 309 is rotatably connected to the upper portion of the second fixing frame 306, the second bevel gear 309 is slidably connected to the first fixing rod 205, the second bevel gear 309 is engaged with the first bevel gear 308, the third bevel gear 310 is rotatably connected to the oil squeezing plate 302, the third bevel gear 310 is engaged with the first bevel gear 308, the stirring member 311 is fixedly connected to the lower end of the third bevel gear 310, the stirring member 311 is set in a cross shape, four outer end surfaces of the lower surface of the stirring member 311 are set as inclined surfaces gradually changing toward the center point of the stirring member 311, four outer end faces of stirring piece 311 are baffle portion 311a setting, drive second bevel gear 309 clockwise rotation through first dead lever 205 to the drive, stirring piece 311 rotates, makes this device reverse stirring lubricating oil at the during operation, prevents not using for a long time after, can't well get into three gear wheel 105 behind the lubricating oil caking.

As shown in fig. 11-13, the anti-torque mechanism includes three first sliding rods 401, three springs 402 and a pressing plate 403, the three first sliding rods 401 are slidably connected to three pipes inside the buffer frame 202, two ends of each first sliding rod 401 are respectively sleeved with one third spring 402, one end of each third spring 402 is fixedly connected to the first sliding rod 401, the other end of each third spring 402 is fixedly connected to the buffer frame 202, the middle portion of each first sliding rod 401 is fixedly connected to the pressing plate 403, and the rotating block 204 presses the first sliding rod 401, so as to press hydraulic oil in the pipe on the buffer frame 202, thereby reducing the instant torque when the device is started.

When the device works, a worker installs the mounting frame 101 on an external drill rod, the drill rod drives the device to move downwards, when the device moves to the roller 105 and cannot move downwards, the drill rod drives the mounting frame 101 and the two trapezoidal blocks 201 to continue moving downwards, when the two trapezoidal blocks 201 move to the inside of the groove in the upper surface of the rotating sleeve 203, the mounting frame 101 and the two trapezoidal blocks 201 extrude the rotating sleeve 203, the rotating sleeve 203 is extruded to move downwards, the rotating sleeve 203 drives the three rotating blocks 204 and the first fixing rod 205 to move downwards, when the first fixing rod 205 moves downwards to extrude the sliding part 208 and the opening on the upper part of the rotating sleeve 203 is communicated with the drilling fluid conveying pipe 211, drilling fluid is sprayed out from the liquid outlet pipe 104 along the mounting frame 101, the rotating sleeve 203 and the drilling fluid conveying pipe 211 from the inside of the drill rod, the sliding part 208 is extruded to move downwards, the sliding part 208 moves downwards to extrude the first spring 207, when the sliding part 208 moves downwards to the position where the sliding part no longer blocks the three openings inside of the oil storage cavity 206, the drill rod starts to rotate clockwise, the drill rod drives the mounting frame 101 to rotate clockwise, the mounting frame 101 rotates clockwise to drive the two trapezoidal blocks 201 to rotate clockwise, the two trapezoidal blocks 201 drive the rotating sleeve 203 to rotate clockwise, the rotating sleeve 203 drives the three rotating blocks 204 and the first fixing rod 205 to rotate clockwise, the three rotating blocks 204 rotate clockwise to extrude one ends of the three first sliding rods 401, the three first sliding rods 401 rotate clockwise, the extruded ends of the three first sliding rods 401 extrude three third springs 402 on the nearest side in the clockwise direction, the three first sliding rods 401 rotate clockwise to drive the three extrusion plates 403 to rotate clockwise, the three extrusion plates 403 extrude hydraulic oil in pipelines in the buffer frame 202, the hydraulic oil buffers the torque when the device is started instantaneously, the instantaneous torque when the device is started is prevented from damaging the device, at the moment, the three rotating blocks 204 drive the buffer frame 202 to rotate clockwise, the buffer frame 202 drives the rotating shell 102 to rotate clockwise, the rotating shell 102 drives the oil storage cavity 206 to rotate clockwise, the oil storage cavity 206 drives the lubricating oil therein to rotate, the first fixing rod 205 rotates clockwise to drive the second bevel gear 309 to rotate clockwise, the second bevel gear 309 rotates clockwise to drive the first bevel gear 308 to rotate counterclockwise, the first bevel gear 308 rotates counterclockwise to drive the third bevel gear 310 to rotate counterclockwise, the third bevel gear 310 drives the stirring piece 311 and the baffle part 311a to rotate counterclockwise, the stirring piece 311 and the baffle part 311a stir the lubricating oil in the oil storage cavity 206 counterclockwise, the lubricating oil is sprayed onto the bearing 210 through the oil pipe 209 under the action of centrifugal force, the bearing 210 is automatically injected with the lubricating oil, after long-time work, the lubricating oil in the oil storage cavity 206 is reduced, and under the action of centrifugal force, the residual lubricating oil is tightly attached to the inner wall of the oil storage cavity 206, at this time, because the lubricating oil below is reduced, the upward supporting force of the lubricating oil on the oil squeezing plate 302 is reduced, the oil squeezing plate 302 moves downwards, the lubricating oil tightly attached to the inner wall of the oil storage cavity 206 is scraped, the oil squeezing plate 302 drives the second fixing frame 306 and the third bevel gear 310 to move downwards, the third bevel gear 310 drives the stirring piece 311 and the baffle part 311a to move downwards, the second fixing frame 306 drives the third fixing rod 307 and the second bevel gear 309 to move downwards, the third fixing rod 307 drives the first bevel gear 308 to move downwards, the second bevel gear 309 is kept engaged with the first bevel gear 308 all the time, the third bevel gear 310 is always engaged with the first bevel gear 308, the stirring piece 311 and the baffle part 311a rotate anticlockwise all the time to scrape the lubricating oil in the oil storage cavity 206, the lubricating oil entering the oil conveying pipe 209 all the time is kept, at this time, the four sliding blocks 305 slide outwards on the four second fixing rods 303 due to the action of centrifugal force, the four sliding blocks 305 slide and stretch the four tension springs 304 outwards, the gravity applied to the outer side above the oil extrusion plate 302 is increased, the oil extrusion plate 302 further moves downwards, the lubricating oil tightly attached to the inner wall of the oil storage cavity 206 is scraped, when drilling is finished and the drill rod stops rotating, the rotating speed of the drill rod is gradually reduced under the action of inertia, and the device continues to rotate clockwise under the action of inertia, so that the rotating speed of the three rotating blocks 204 is not consistent with that of the buffer frame 202, the other ends of the three first sliding rods 401 touch the three rotating blocks 204, the three first sliding rods 401 rotate anticlockwise, one ends of the three first sliding rods 401 which are extruded extrude the three third springs 402 on the nearest side in the anticlockwise direction, the three first sliding rods 401 rotate anticlockwise to drive the three extrusion plates 403 to rotate anticlockwise, the three extrusion plates 403 extrude hydraulic oil in the pipeline in the buffer frame 202 anticlockwise, the hydraulic oil prevents the rotating speed of the rotating shell 102 and the idle rotation preventing rotating mechanism from being inconsistent, the device is damaged, until the rotating shell 102 stops rotating, a drill rod is lifted, the drill rod drives the mounting rack 101 to move upwards, when the mounting rack 101 moves upwards to the initial position when the roller cone 105 cannot move downwards, the rotating sleeve 203 moves upwards to reset, holes in the rotating sleeve 203 are not communicated with the drilling fluid conveying pipe 211 any more, the drilling fluid does not enter the drilling fluid conveying pipe 211 any more, the drilling fluid flows into a sealed cavity formed by the mounting rack 101 and the rotating shell 102 after moving upwards through the rotating sleeve 203, the rotating sleeve 203 drives the first fixing rod 205 to move upwards, the sliding part 208 is not extruded any more, the first spring 207 resets upwards to drive the sliding part 208 to move upwards, the sliding part 208 blocks three open holes in the oil storage cavity 206, the lubricating oil does not enter the oil conveying pipe 209 any more, and the lubricating oil is prevented from being injected into the bearing 210 when the roller cone 105 does not work, until this device no longer rotates, work is ended, until the work of starting the drilling rod next time, repeat above-mentioned step, if the staff forgets to shut down the drilling rod, still rotatory behind the mounting bracket 101 rebound, the mounting bracket 101 no longer drives and rotates cover 203 this moment, and drilling fluid no longer gets into drain pipe 104, and the drilling fluid gathering is cooled down the mounting bracket 101 of always rotating in the cavity of mounting bracket 101 with rotatory casing 102 formation, until the staff discovery.

Example 3

Based on embodiment 2, as shown in fig. 14 to 16, the device further includes an anti-drill-debris blocking mechanism, the anti-drill-debris blocking mechanism includes a third fixing frame 501, a second sliding rod 502, a fourth spring 503, an anti-blocking block 504, a first toothed plate 505, a fourth fixing rod 506, a spur gear 507 and a second toothed plate 508, the third fixing frame 501 is fixedly connected inside the liquid outlet pipe 104, the second sliding rod 502 is slidably connected to the middle of the third fixing frame 501, the fourth spring 503 is sleeved on the upper portion of the second sliding rod 502, the lower end of the fourth spring 503 is fixedly connected to the upper surface of the third fixing frame 501, the upper end of the fourth spring 503 is fixedly connected to the second sliding rod 502, the lower end of the second sliding rod 502 is rotatably connected to the anti-blocking block 504, the first toothed plate 505 is fixedly connected to the upper end of the second sliding rod 502, the fourth fixing rod 506 is fixedly connected inside the liquid outlet pipe 104, the fourth fixing rod 506 is rotatably connected to the spur gear 507, the spur gear 507 is engaged with the first toothed plate 505, inside sliding connection of drain pipe 104 has second pinion rack 508, and second pinion rack 508 is located fourth dead lever 506 downside, and second pinion rack 508 meshes with spur gear 507, is provided with the protruding piece of a plurality of on the conical surface of anti-clogging block 504, and the protruding piece sets up to semi-circular, drives through second pinion rack 508 and prevents that clogging block 504 from removing, prevents that the detritus from blockking up drain pipe 104.

When the device works, a worker installs the mounting frame 101 on an external drill rod, the drill rod drives the device to move downwards, when the device moves to the roller 105 and cannot move downwards, the drill rod drives the mounting frame 101 to continue moving downwards, when the mounting frame 101 moves downwards to contact with the upper surface of the rotary shell 102, the drill rod starts to rotate clockwise, the drill rod drives the mounting frame 101 to rotate clockwise, the mounting frame 101 drives the idle rotation prevention rotating mechanism to rotate clockwise, the idle rotation prevention rotating mechanism extrudes the idle rotation prevention overlarge mechanism when rotating clockwise, the idle rotation prevention overlarge mechanism is extruded and started by the idle rotation prevention rotating mechanism, the idle rotation prevention overlarge mechanism is used for preventing the device from being damaged due to overlarge torque when the drill rod drives the mounting frame 101 to rotate clockwise, the idle rotation prevention rotating mechanism drives the rotary shell 102 to rotate clockwise, the rotary shell 102 drives the three first fixing frames 103, the three liquid outlet pipes 104 and the three roller 105 to rotate clockwise, when the three liquid outlet pipes 104 rotate clockwise, the second toothed plate 508 moves outwards under the action of centrifugal force, the second toothed plate 508 moves outwards to drive the spur gear 507 to rotate clockwise, the spur gear 507 rotates clockwise to drive the first toothed plate 505 to move downwards, the first toothed plate 505 moves downwards to drive the second sliding rod 502 to move downwards, the second sliding rod 502 moves downwards to extrude the fourth spring 503, the second sliding rod 502 moves downwards to drive the anti-blocking block 504 to move downwards, the anti-blocking block 504 does not block the liquid outlet pipes 104, the drilling liquid is sprayed out from the liquid outlet pipes 104, when the three cones 105 rotate, the rocks below the shaft are crushed, the downward drilling work is carried out, when the three cones 105 rotate, the rock debris of the crushed rocks falls into the drilling liquid, when the rock debris in the drilling liquid touches a plurality of semicircular bulges on the anti-blocking block 504, the anti-blocking block 504 starts to rotate, and after the anti-blocking block 504 rotates, the semicircular bulges on the drilling rod strike surrounding rock debris to prevent the rock debris in the drilling fluid from blocking the liquid outlet pipe 104, when a worker stops the drilling rod, the rotating speed of the drilling rod is slowed down under the action of inertia, after the speed of the drilling rod is slowed down, the rotating speed of the mounting frame 101 driven by the drilling rod is slowed down, the rotating speed of the idle rotation preventing rotating mechanism is slowed down, the idle rotation preventing rotating mechanism reversely extrudes the idle rotation preventing overlarge torque mechanism, at the moment, the anti-overlarge torque mechanism prevents the rotating speed of the rotating shell 102 and the idle rotation preventing rotating mechanism from being inconsistent, the device is damaged, the anti-overlarge torque mechanism decelerates the rotating shell 102, after the clockwise rotating speed of the rotating shell 102 is slowed down, the clockwise rotating speeds of the three first fixing frames 103, the three liquid outlet pipes 104 and the three cones 105 are slowed down, and after the clockwise rotating speeds of the three liquid outlet pipes 104 are slowed down, the centrifugal force of the second gear plate 508 is weakened, after the centrifugal force applied to the second toothed plate 508 is weakened, the force of the second toothed plate 508 for clockwise rotation of the straight gear 507 is weakened, the straight gear 507 drives the first toothed plate 505 to move downwards, when the force of the first toothed plate 505 moving downwards is weakened to the extent that the force cannot drive the second sliding rod 502 to press the fourth spring 503 downwards, the fourth spring 503 starts to stretch and reset, the fourth spring 503 drives the second sliding rod 502 to slide upwards, the second sliding rod 502 drives the first toothed plate 505 and the anti-blocking block 504 to slide upwards, the anti-blocking block 504 slides upwards to block the liquid outlet pipe 104, the first toothed plate 505 slides upwards to drive the straight gear 507 to rotate anticlockwise, the straight gear 507 rotates anticlockwise to drive the second toothed plate 508 to move towards the inner side of the liquid outlet pipe 104, until the device stops rotating, the operation is finished until the next drill rod operation is started, the above steps are repeated, if the operator forgets to stop the drill rod, the mounting frame 101 rotates after moving upwards, at this moment, the mounting frame 101 no longer drives the anti-idle rotation rotating mechanism to rotate, the drilling fluid no longer enters the liquid outlet pipe 104, and the drilling fluid is gathered in a cavity formed by the mounting frame 101 and the rotating shell 102 to cool the mounting frame 101 which rotates all the time until the drilling fluid is found by workers.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A roller bit with an automatic oil injection function for petroleum drilling comprises a mounting frame (101), a rotary shell (102), a first fixing frame (103), liquid outlet pipes (104), a roller (105), an idle rotation prevention rotary mechanism, a lubricating oil adherence prevention mechanism and an excessive torque prevention mechanism, wherein the mounting frame (101) is in threaded connection with an external drill rod, a pipeline for conveying drilling fluid is arranged inside the mounting frame (101), a stepped annular groove is formed in the lower part of the mounting frame (101), the upper end of the rotary shell (102) is provided with a stepped annular bulge, the rotary shell (102) is slidably connected to the lower part of the mounting frame (101), the mounting frame (101) is in sliding connection and matching with the rotary shell (102) to form a cavity, the three first fixing frames (103) are fixedly connected to the lower part of the rotary shell (102) in the circumferential direction, three liquid outlet pipes (104) are arranged, and the three liquid outlet pipes (104) are circumferentially embedded in the lower part of the rotary shell (102), the lower end of the first fixing frame (103) is rotatably connected with a cone (105), the idle rotation preventing rotating mechanism is connected to the rotating shell (102) in a sliding mode, the lubricating oil adherence preventing mechanism is fixedly connected inside the idle rotation preventing rotating mechanism, the torque oversize preventing mechanism is located inside the idle rotation preventing rotating mechanism, and the torque oversize preventing mechanism is located above the lubricating oil adherence preventing mechanism; the idle rotation preventing rotating mechanism comprises trapezoidal blocks (201), a buffer frame (202), rotating sleeves (203), rotating blocks (204), a first fixing rod (205), a drilling fluid conveying pipe (211) and an automatic oil outlet assembly, wherein two trapezoidal blocks (201) are arranged, the two trapezoidal blocks (201) are fixedly connected to the lower portion of a mounting frame (101), the two trapezoidal blocks (201) are symmetrically arranged, the buffer frame (202) is fixedly connected to the inner wall of a rotating shell (102), three pipelines are arranged inside the buffer frame (202), hydraulic oil is arranged inside the pipelines, the rotating sleeves (203) are slidably connected to the inside of the buffer frame (202), three holes are formed in the upper portion of each rotating sleeve (203), two grooves are formed in the upper surface of each rotating sleeve (203), the sizes of the two grooves are the same as the sizes of the trapezoidal blocks (201), the three rotating blocks (204) are arranged, the three rotating blocks (204) are fixedly connected to the lower portion of the rotating sleeves (203) in the circumferential direction, the first fixing rod (205) is fixedly connected to the lower end of the rotating sleeves (203), the first fixing rod (205) is arranged in a spline mode, a well conveying liquid pipe (211) is embedded in the liquid outlet pipe (104), the automatic oil outlet assembly is located in the rotary shell (102), and the automatic oil outlet assembly is fixedly connected to the lower portion of the buffer frame (202).

2. The roller cone drill bit with the automatic oil injection function for the oil drilling as claimed in claim 1, wherein: automatic oil outlet assembly is including oil storage chamber (206), first spring (207), slider (208), defeated oil pipe (209) and bearing (210), oil storage chamber (206) rigid coupling in the inside upper surface of swivel housing (102), first spring (207) lower extreme rigid coupling in the inside upper surface of swivel housing (102), first spring (207) are located inside oil storage chamber (206), slider (208) sliding connection is inside in oil storage chamber (206), first spring (207) upper end rigid coupling in slider (208) lower surface, first mount (103) are embedded to have defeated oil pipe (209), defeated oil pipe (209) upper end communicates in oil storage chamber (206), bearing (210) are installed to first mount (103) lower extreme, be connected with cone (105) on bearing (210), defeated drilling fluid pipe (211) communicate in the trompil department of rotating sleeve (203) upper portion.

3. The roller cone drill bit with the automatic oil injection function for the oil drilling as claimed in claim 2, wherein: the upper hole of the rotating sleeve (203) is consistent with the inner diameter of the well drilling fluid conveying pipe (211).

4. The roller cone drill bit with the automatic oil injection function for the oil drilling as claimed in claim 1, wherein: the lubricating oil adherence preventing mechanism comprises four second springs (301), four oil squeezing plates (302), four second fixing rods (303), four tension springs (304), four sliding blocks (305) and a lubricating oil stirring assembly, wherein the upper ends of the four second springs (301) are fixedly connected to the upper surface of the inner part of the oil storage cavity (206), the oil squeezing plates (302) are fixedly connected to the lower ends of the four second springs (301), annular grooves are formed in the oil squeezing plates (302), the four second fixing rods (303) are provided, the four second fixing rods (303) are circumferentially and fixedly connected to the oil squeezing plates (302), the four tension springs (304) are respectively sleeved on the four second fixing rods (303), one ends of the four tension springs (304) are respectively and fixedly connected to the oil squeezing plates (302), the four sliding blocks (305) are provided, the four sliding blocks (305) are respectively and slidably connected to the four second fixing rods (303), and the other ends of the four tension springs (304) are respectively connected to the four sliding blocks (305), the lubricating oil stirring component is fixedly connected inside the oil storage cavity (206).

5. The roller cone drill bit with the function of automatically oiling for oil drilling according to claim 4, wherein: the lubricating oil stirring assembly comprises a second fixing frame (306), a third fixing rod (307), a first bevel gear (308), a second bevel gear (309), a third bevel gear (310) and a stirring piece (311), wherein the second fixing frame (306) is fixedly connected to the upper end of the oil squeezing plate (302), the third fixing rod (307) is rotatably connected to the lower portion of the second fixing frame (306), the third fixing rod (307) is fixedly connected with the first bevel gear (308), the second bevel gear (309) is rotatably connected to the second fixing frame (306), the second bevel gear (309) is slidably connected to the upper portion of the first fixing rod (205), the second bevel gear (309) is meshed with the first bevel gear (308), the third bevel gear (310) is rotatably connected to the oil squeezing plate (302), the third bevel gear (310) is meshed with the first bevel gear (308), and the stirring piece (311) is fixedly connected to the lower end of the third bevel gear (310).

6. The roller cone drill bit with the automatic oil injection function for the oil drilling as claimed in claim 5, wherein: the stirring piece (311) is arranged in a cross shape, four outer end faces of the lower surface of the stirring piece (311) are all arranged to be inclined faces gradually changing towards the central point of the stirring piece (311), and four outer end faces of the stirring piece (311) are arranged to be baffle portions (311 a).

7. The roller cone drill bit with the automatic oil injection function for the oil drilling as claimed in claim 1, wherein: prevent too big mechanism of moment of torsion is including first slide bar (401), third spring (402) and stripper plate (403), first slide bar (401) are equipped with threely, three first slide bar (401) sliding connection is in the inside three pipeline of buffer frame (202), first slide bar (401) both ends are overlapped respectively and are equipped with one third spring (402), the one end rigid coupling of third spring (402) in first slide bar (401), the other end rigid coupling of third spring (402) in buffer frame (202), first slide bar (401) middle part rigid coupling has stripper plate (403).

8. The roller cone drill bit with the function of automatically oiling for oil drilling according to claim 7, wherein: the anti-drill-chip blocking device also comprises an anti-drill-chip blocking mechanism, the anti-drill-chip blocking mechanism comprises a third fixing frame (501), a second sliding rod (502), a fourth spring (503), an anti-blocking block (504), a first toothed plate (505), a fourth fixing rod (506), a straight gear (507) and a second toothed plate (508), the third fixing frame (501) is fixedly connected inside the liquid outlet pipe (104), the second sliding rod (502) is slidably connected in the middle of the third fixing frame (501), the fourth spring (503) is sleeved on the upper portion of the second sliding rod (502), the lower end of the fourth spring (503) is fixedly connected on the upper surface of the third fixing frame (501), the upper end of the fourth spring (503) is fixedly connected on the second sliding rod (502), the lower end of the second sliding rod (502) is rotatably connected with the anti-blocking block (504), the first toothed plate (505) is fixedly connected on the upper end of the second sliding rod (502), the fourth fixing rod (506) is fixedly connected inside the liquid outlet pipe (104), the fourth fixing rod (506) is connected with a straight gear (507) in a rotating mode, the straight gear (507) is meshed with the first toothed plate (505), the liquid outlet pipe (104) is connected with a second toothed plate (508) in an internal sliding mode, the second toothed plate (508) is located on the lower side of the fourth fixing rod (506), and the second toothed plate (508) is meshed with the straight gear (507).

9. The roller cone drill bit with the function of automatically oiling for oil drilling according to claim 8, wherein: the conical surface of the anti-blocking block (504) is provided with a plurality of convex blocks which are arranged in a semicircular shape.