CN209838372U

CN209838372U - Kelly cock valve

Info

Publication number: CN209838372U
Application number: CN201920455606.2U
Authority: CN
Inventors: 吴凤宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2019-12-24
Anticipated expiration: 2029-04-04

Abstract

The utility model relates to a kelly cock valve, which comprises a valve body, the valve body is the cavity body, be provided with interior disk seat one and interior disk seat two in the valve body, interior disk seat one and two fixed mounting of interior disk seat in the valve body, one side switch-on high-pressure chamber of interior disk seat one, two one sides switch-on low-pressure chamber of interior disk seat, sealed rotation is connected with the sealed post of cock in disk seat one and the interior disk seat two, open in the sealed post of cock and be equipped with the air vent. The utility model discloses be convenient for carry out the protection of safety cover to exposing outside rotation end, prevent because the corrosion can't be used when emergency takes place, through pressure release mechanism's setting, be convenient for carry out the pressure release earlier when the high pressure, avoid rotating the circumstances that the post takes place to become invalid under the high-pressure condition, through lubricating mechanism's setting, be convenient for carry out long-term lubrication to rotating the piece and keep, because lubricated not good satisfied opening rotation when avoiding using.

Description

Kelly cock valve

Technical Field

The utility model relates to an oil drilling tool technical field, concretely relates to kelly plug valve.

Background

The kelly bar plug valve is a blowout prevention tool in a drill string for preventing drilling fluid from splashing, improving the working condition of a driller and preventing well blowout accidents, and is widely applied to engineering practice. However, when the kelly bar plug valve is used for driving the ball-shaped valve core under high pressure, a large pressure difference is formed between the high pressure in the rear valve cavity at the lower part of the ball-shaped valve core and the low pressure in the front valve cavity at the upper part of the ball-shaped valve core, so that large pressure is generated between the ball-shaped valve core and the front valve seat, and when the rotating shaft is rotated, the ball-shaped valve core is difficult to rotate due to large friction force generated by the large pressure.

At present, the internal blowout prevention tool of the plug valve for the oil-gas well mainly comprises a valve body, an upper valve seat, a lower valve seat, a valve ball, a knob switch, a special knob wrench and the like. The plug valve is normally open at ordinary times, and when a kick or overflow occurs, the knob is rotated clockwise by the special wrench, the valve ball is driven to rotate 90 degrees by the shifting block, the channel is closed, and the blowout accident in high-pressure drilling is prevented.

In the long-term field use process, after a valve ball is closed, the valve ball is difficult to open when encountering blowout high-pressure fluid, so that the rotation failure of a plug valve is caused.

Therefore, the utility model designs a kelly cock valve to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to overcome at least one of the drawbacks of the prior art, and to provide a kelly bar plug valve, so as to solve the problems of the above background art that a very large pressure difference is formed between a high pressure in a rear valve cavity at the lower part of a ball-shaped valve element and a low pressure in a front valve cavity at the upper part of the ball-shaped valve element when the kelly bar plug valve is operated under a high pressure, so that a very large pressure is generated between the ball-shaped valve element and a front valve seat, and when a rotating shaft is rotated, the ball-shaped valve element is difficult to rotate due to a very large friction force; the plug valve frequently generates the problems that the sealing between the valve core and the valve seat fails, the rotating pin cannot rotate, the valve seat is damaged by puncture, the valve core is inactive for a long time, the sealing surface of the valve seat is seriously corroded, the knob cannot rotate, the plug valve body is broken, and the opening and closing actions of the plug valve cannot be realized.

In order to realize the technical scheme, the utility model discloses a following technical scheme:

according to one aspect of the utility model, a kelly cock valve is provided, which comprises a valve body, the valve body is a hollow pipe body, a first inner valve seat and a second inner valve seat are arranged in the valve body, the first inner valve seat and the second inner valve seat are fixedly arranged in the valve body, one side of the first inner valve seat is communicated with a high pressure cavity, one side of the second inner valve seat is communicated with a low pressure cavity, a cock sealing column is connected in the first valve seat and the second inner valve seat in a sealing and rotating way, an air vent is arranged in the cock sealing column, the upper end and the lower end of the cock sealing column are respectively provided with a rotating column and a limiting column, the rotating column and the limiting column are movably inserted in the valve body, the rotating column penetrates through the valve body, the top of the rotating column is connected with an inner hexagon nut joint, a seat head is arranged on the valve body, the inner hexagon nut joint is arranged, the outside of protective cover articulates on the valve body, be connected with pressure release mechanism on the interior disk seat one, one side of rotating the post is connected with lubricated mechanism.

According to the utility model discloses an embodiment, pressure release mechanism includes a set of pressure release passageway, pressure release passageway sets up in valve body and interior disk seat one, pressure release passageway on the valve body is connected with the screw thread chamber, threaded connection has the pressure release bolt in the screw thread chamber, the airtight lantern ring has been cup jointed in the terminal outside of pressure release bolt.

According to the utility model discloses an embodiment, lubricated mechanism includes lubricated passageway, lubricated passageway's one end intercommunication rotation post pivoted commentaries on classics hole, lubricated passageway's the lubricated box of storing of other end intercommunication, the lubricated outside of storing the box at the valve body is stored, the top of lubricated box of storing is connected with the filler, the filler is screwed inclusively through the lid.

According to the utility model discloses an embodiment, the viewing aperture has been seted up to one side of lubricated storage box, through being provided with liquid level display glass board in the viewing aperture, be convenient for keep watch on the lubricating oil liquid level.

According to the utility model discloses an embodiment, it is sealed through vertically cup jointing the sealing ring one on interior disk seat one between interior disk seat one and the valve body, it is sealed through vertically cup jointing the sealing ring two on interior disk seat two between interior disk seat two and the valve body.

According to the utility model discloses an embodiment, through transversely cup jointing the sealing ring three on spacing post between spacing post and the valve body sealed, it is sealed through transversely cup jointing the sealing ring four on rotating the post to rotate between post and the valve body.

According to the above technical scheme, the utility model discloses possess at least one in following advantage and the positive effect:

the utility model discloses be convenient for carry out the protection of safety cover to exposing outside rotation end, prevent because the corrosion can't be used when emergency takes place, through pressure release mechanism's setting, be convenient for carry out the pressure release earlier when the high pressure, avoid rotating the circumstances that the post takes place to become invalid under the high-pressure condition, through lubricating mechanism's setting, be convenient for carry out long-term lubrication to rotating the piece and keep, because lubricated not good satisfaction is opened the rotation when avoiding using, the seal of valve body is good.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a Kelly bar plug valve of the present invention;

FIG. 2 is a schematic view of the pressure relief mechanism of the present invention;

fig. 3 is a schematic structural diagram of the lubricating mechanism of the present invention.

The reference numerals are explained below:

1-valve body, 2-first inner valve seat, 3-second inner valve seat, 4-plug sealing column, 5-first sealing ring, 6-second sealing ring, 7-high pressure cavity, 8-low pressure cavity, 9-limiting column, 10-third sealing ring, 11-rotating column, 12-fourth sealing ring, 13-seat head, 14-inner hexagon nut joint, 15-protective cover, 16-pressure relief mechanism, 161-pressure relief channel, 162-threaded cavity, 163-pressure relief bolt, 164-airtight collar, 17-lubricating mechanism, 171-lubricating storage box, 172-filling port, 173-cover body, 174-observation port, 175-liquid level display glass plate, 176-lubricating channel.

Detailed Description

In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention is understood according to the specific situation.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, 2 and 3, fig. 1 is the structural schematic diagram of the kelly bar plug valve of the present invention, fig. 2 is the structural schematic diagram of the pressure relief mechanism of the present invention, and fig. 3 is the structural schematic diagram of the lubricating mechanism of the present invention.

The utility model relates to a kelly bar plug valve, which comprises a valve body 1, wherein the valve body 1 is a hollow pipe body, a first inner valve seat 2 and a second inner valve seat 3 are arranged in the valve body 1, the first inner valve seat 2 and the second inner valve seat 3 are fixedly arranged in the valve body 1, one side of the first inner valve seat 2 is communicated with a high-pressure cavity 7, one side of the second inner valve seat 3 is communicated with a low-pressure cavity 8, a plug sealing post 4 is connected in the first valve seat 2 and the second inner valve seat 3 in a sealing and rotating way, a vent hole is arranged in the plug sealing post 4, the upper end and the lower end of the sealing post 4 are respectively provided with a rotating post 11 and a limiting post 9, the rotating post 11 and the limiting post 9 are movably inserted in the valve body 1, the rotating post 11 penetrates through the valve body 1, the top of the rotating post 11 is connected with a hexagon socket nut joint 14, a seat head 13 is arranged on the valve body 1, the hexagon nut joint, the inner valve seat I2 is connected with a pressure relief mechanism 16, and one side of the rotating column 11 is connected with a lubricating mechanism 17.

The utility model discloses in, pressure release mechanism 16 includes a set of pressure release channel 161, and pressure release channel 161 sets up in valve body 1 and internal valve seat one 2, and pressure release channel 161 on the valve body 1 is connected with threaded cavity 162, and threaded connection has pressure release bolt 163 in the threaded cavity 162, and airtight lantern ring 164 has been cup jointed in the terminal outside of pressure release bolt 163. The lubricating mechanism 17 comprises a lubricating channel 176, one end of the lubricating channel 176 is communicated with a rotary hole for rotating the rotary column 11, the other end of the lubricating channel 176 is communicated with a lubricating storage box 171, the lubricating storage box 171 is fixed on the outer side of the valve body 1, a filling port 172 is connected above the lubricating storage box 171, and the filling port 172 is tightly screwed and sealed through a cover body 173. An observation port 174 is formed at one side of the lubricating oil storage box 171, and a liquid level display glass plate 175 is arranged in the observation port 174 to monitor the liquid level of the lubricating oil. Interior disk seat 2 is sealed through vertically cup jointing sealing ring one 5 on interior disk seat 2 between the valve body 1, and interior disk seat two 3 is sealed through vertically cup jointing sealing ring two 6 on interior disk seat two 3 between the valve body 1, and the leakproofness of plug valve is strengthened to sealing ring one 5 and sealing ring two 6. The sealing structure is characterized in that the limiting column 9 and the valve body 1 are sealed through a sealing ring III 10 which is transversely sleeved on the limiting column 9, the rotating column 11 and the valve body 1 are sealed through a sealing ring IV 12 which is transversely sleeved on the rotating column 11, and the sealing performance of the plug valve is enhanced through the sealing ring III 10 and the sealing ring IV 12.

One specific application of this embodiment is: when a blowout accident happens, a large pressure difference is formed between the high pressure in the high pressure cavity 7 on one side of the cock sealing column 4 and the low pressure in the low pressure cavity 8 on one side of the cock sealing column 4, so that large pressure is generated between the cock sealing column 4 and the valve seat I2 and the inner valve seat II 3, when the rotating column 11 is rotated, the cock sealing column 4 is difficult to rotate due to large friction force generated by large pressure, so that the kelly plug valve cannot be opened, at the moment, a tool can be used for rotating a pressure relief bolt 163 in the pressure relief mechanism 16, high-pressure gas enters the threaded cavity 162 through the pressure relief channel 161, after the pressure relief bolt 163 is gradually loosened, the high-pressure gas can be released, the pressure of the cock sealing column 4 is reduced, the rotating column 11 can be rotated through the tool, so that the cock sealing column 4 is rotated, the high pressure is dredged, lubricating oil is filled in a lubricating storage box 171 of the, the rotary plug sealing column 4 and the rotary column 11 are lubricated through the lubricating channel 176, so that the corrosion and the locking are avoided.

It is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth herein. The present invention is capable of other embodiments and of being practiced and carried out in a variety of ways. The foregoing variations and modifications fall within the scope of the present invention. It will be understood that the invention disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. The embodiments described herein explain the best modes known for practicing the invention and will enable others skilled in the art to utilize the invention.

Claims

1. A kelly bar plug valve comprises a valve body and is characterized in that the valve body is a hollow pipe body, a first inner valve seat and a second inner valve seat are arranged in the valve body, the first inner valve seat and the second inner valve seat are fixedly installed in the valve body, one side of the first inner valve seat is communicated with a high-pressure cavity, one side of the second inner valve seat is communicated with a low-pressure cavity, a plug sealing column is connected in the first valve seat and the second inner valve seat in a sealing and rotating mode, an air vent is formed in the plug sealing column, a rotating column and a limiting column are respectively arranged at the upper end and the lower end of the plug sealing column, the rotating column and the limiting column are movably inserted in the valve body in an inserting mode, the rotating column penetrates through the valve body, an inner hexagon nut joint is connected to the top of the rotating column, a seat head is arranged on the valve body, the inner hexagon nut joint is arranged inside the seat head, and the inner valve seat I is connected with a pressure relief mechanism, and one side of the rotating column is connected with a lubricating mechanism.

2. The kelly bar plug valve of claim 1, wherein the pressure relief mechanism comprises a set of pressure relief channels, the pressure relief channels are arranged in the valve body and the inner valve seat I, the pressure relief channels on the valve body are connected with a threaded cavity, a pressure relief bolt is in threaded connection with the threaded cavity, and an airtight lantern ring is sleeved on the outer side of the tail end of the pressure relief bolt.

3. The kelly bar plug valve of claim 1, wherein the lubricating mechanism comprises a lubricating channel, one end of the lubricating channel is communicated with a rotating hole of the rotating column, the other end of the lubricating channel is communicated with a lubricating storage box, the lubricating storage box is fixed on the outer side of the valve body, a filling port is connected above the lubricating storage box, and the filling port is screwed and sealed through a cover body.

4. The kelly bar plug valve of claim 3, wherein a viewing port is formed in one side of the lubrication storage box, and a liquid level display glass plate is arranged in the viewing port.

5. The kelly bar plug valve of claim 1, wherein the first inner valve seat and the valve body are sealed by a first sealing ring longitudinally sleeved on the first inner valve seat, and the second inner valve seat and the valve body are sealed by a second sealing ring longitudinally sleeved on the second inner valve seat.

6. The kelly bar plug valve of claim 1, wherein the spacing post and the valve body are sealed by a third sealing ring laterally sleeved on the spacing post, and the rotating post and the valve body are sealed by a fourth sealing ring laterally sleeved on the rotating post.