CN217681660U

CN217681660U - Anti-loosening mechanism for rubber core nut of rotary blowout preventer

Info

Publication number: CN217681660U
Application number: CN202221450502.0U
Authority: CN
Inventors: 柏轲
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-10-28
Anticipated expiration: 2032-06-10

Abstract

The utility model belongs to the technical field of rotatory preventer, a rotatory preventer rubber core nut locking release mechanism is disclosed, including the hanger, the hanger is equipped with the through-hole, connecting screw has been placed to the through-hole, connecting screw one end threaded connection has the rubber core, connecting screw other end threaded connection has lock nut, the hanger is equipped with the screw thread, screw thread threaded connection has the locking lid, the locking lid is the hollow cylindrical structure of L type for the cross-section, the hanger in the position of screw thread is equipped with a plurality of first fixed orificess, the locking lid be equipped with the second fixed orifices that first fixed orifices position corresponds, a plurality of second fixed orifices are along the direction slope of screw thread sets up, connecting screw's screw thread with the screw thread of screw thread is opposite, first fixed orifices with the second fixed orifices is matchd in the lump and has the bolt.

Description

Anti-loosening mechanism for rubber core nut of rotary blowout preventer

Technical Field

The utility model belongs to the technical field of rotatory preventer, concretely relates to rotatory preventer rubber core nut locking release mechanism.

Background

The passive rotary blowout preventer (RCD) is installed on the top of blowout preventer stack and wellhead, and is mainly used for sealing wellhead annulus and rotary drilling tool by using special sealing rubber core and shunting wellhead return fluid when pressurized drilling operation such as underbalanced drilling process is implemented. The device is one of the very important devices for special operations such as liberation of low-pressure oil-gas reservoirs, underbalanced pressure control drilling, snubbing workover and the like.

The rotary assembly of the passive rotary blowout preventer mainly depends on the rubber core self material elasticity and the bottom pressure sealing-aid effect to hold the drilling tool tightly through the special sealing rubber core arranged at the upper part and the lower part of the rotary assembly, and rotates along with the drilling tool, so that the purpose of sealing the drilling tool and the borehole annulus is realized, and meanwhile, the rubber core belongs to a quick-wear consumption part and needs to be detached and replaced in real time. At present the packing rubber core commonly used, connect between the mode that adopts bolt and nut and the rotary assembly usually, because well head drilling fluid flow friction, well head blowout preventer group working vibration, drilling tool sliding friction, connecting screw and nut machining error etc. a great deal of factor, increase along with the rubber core live time, all probably make rubber core connecting nut take place the condition of pine and take place to loosen, in the drilling process in case the nut drops into the well, block up the annular space between well and the drilling tool, will take place to hold out the pump and even the risk of sticking out the brill influences well drilling safety. At present, the known method for preventing the nut from loosening mainly adopts the mode of adding a spring gasket and a pin buckle or adopting a special nut and a thread, the modes can reduce the risk of loosening, but the loosening can not be completely avoided, the structure of the special thread nut is complex, the cost is high, and the pin buckle also has the risk of falling off the shaft bottom. The rubber core interlinkage nut can also adopt left-handed threads (namely, anticlockwise threads), and the threaded connection can avoid the loosening of the rubber core interlinkage nut caused by the anticlockwise friction force applied to the rubber core by media such as slurry to a certain extent, but has the following two defects: in the normal operation process of equipment, the equipment can have the condition that constantly shakes and not rotatory, and the screw thread clearance that produces because of the vibrations also can lead to the pine of rubber core nut to take off under this kind of condition. Because of it adopts left-handed screw to glue core link nut, the screw thread that glues core link screw rod and the screw of gluing core terminal surface evenly distributed also need rather than the looks adaptation, so just can cause and glue core, screw rod, nut incompatible with conventional use, lead to the cost-push.

SUMMERY OF THE UTILITY MODEL

To the problem that the above-mentioned background art provided, the utility model aims at: aims to provide a loosening prevention mechanism for a rubber core nut of a rotary blowout preventer.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows:

the utility model provides a rotatory preventer rubber core nut locking release mechanism, includes the hanger, the hanger is equipped with the through-hole, connecting screw has been placed to the through-hole, connecting screw one end threaded connection has the rubber core, connecting screw other end threaded connection has lock nut, the hanger is equipped with the screw thread, threaded connection has the locking lid, the locking lid is the hollow cylindrical structure of L type for the cross-section, the hanger in the position of screw thread is equipped with a plurality of first fixed orificess, the locking lid be equipped with the second fixed orifices that first fixed orifices position corresponds, a plurality of second fixed orifices are along the direction slope of screw thread sets up, connecting screw's screw thread with the screw thread of screw thread is opposite, first fixed orifices with the second fixed orifices matches in the lump has the bolt.

Further inject, the locking lid is connected with the lug, and such design is convenient for the rotation of locking lid.

Further inject, lock nut is the lock nut of hexagonal band base ring, and such design is convenient for cooperate with the locking lid, plays the effect that can be pressed the edge.

Further, at least three first fixing holes are formed, and the design can be better suitable for the position of the locking cover after being screwed.

Further inject, locking lid is steel locking lid, and such design guarantees the intensity of locking lid.

Adopt the beneficial effects of the utility model:

the utility model discloses rely on the locking lid to suppress locking nut for locking nut does not have the ascending space that moves of axial, consequently can not take place the pine completely and take off, simultaneously, the rotatory direction of the gluey core of rotatory assembly during operation is clockwise, receives medium flow resistance influences such as mud, and the left-hand thread that the locking lid set up makes locking lid's axial direction of movement opposite with locking nut all the time, and then guarantees that locking nut is in the state of compressing tightly always and can not take off;

the utility model has simple structure, easy maintenance and operation, and repeated disassembly and assembly, and can fundamentally solve the problem that the existing rubber core connecting nut falls off;

the utility model discloses mutually supporting of first fixed orifices, second fixed orifices and bolt has strengthened the anti-rotation effect of locking lid.

Drawings

The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

fig. 1 is a schematic structural view of an embodiment of a loosening prevention mechanism for a rubber core nut of a rotary blowout preventer according to the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

fig. 3 is a schematic cross-sectional view of the locking cap of the embodiment of the anti-loosening mechanism for the rubber core nut of the rotary blowout preventer according to the present invention;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;

the main element symbols are as follows:

the device comprises a hanger 1, a through hole 2, a connecting screw rod 3, a rubber core 4, a lock nut 5, threads 6, a locking cover 7, a first fixing hole 8, a second fixing hole 9 and a convex block 10.

Detailed Description

In order to make the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below with reference to the accompanying drawings and examples.

As shown in fig. 1-4, the utility model discloses a rotatory preventer rubber core nut locking release mechanism, including hanger 1, hanger 1 is equipped with through-hole 2, connecting screw 3 has been placed to through-hole 2, 3 one end threaded connection of connecting screw has

rubber core

4, 3 other end threaded connection of connecting screw has lock nut 5, hanger 1 is equipped with

screw thread

6, 6 threaded connection of screw thread has locking lid 7, locking lid 7 is the hollow column structure of L type for the cross-section, hanger 1 is equipped with a plurality of first fixed orificess 8 in the position of screw thread 6, locking lid 7 is equipped with the second fixed orifices 9 that correspond with 8 positions of first fixed orifices, a plurality of second fixed orifices 9 are setting along with the direction slope of screw thread 6, connecting screw 3's screw thread is opposite with 6 screw threads, first fixed orifices 8 and second fixed orifices 9 have the bolt to match in the lump.

In the embodiment, when the anti-loosening mechanism of the rubber core nut of the rotary blowout preventer is used, the connecting screw rod 3 is screwed into the rubber core 4, the hanger 1 is placed on the upper side of the rubber core 4 through the through hole 2, the locking nut 5 is screwed tightly, the hanger 1 and the rubber core 4 are preliminarily fixed, the locking cover 7 is screwed on the thread 6, and the locking cover 7 is pressed on the edge of the locking nut 5, because the thread of the connecting screw rod 3 is opposite to the thread of the thread 6, when the rubber core works, the rotating direction is clockwise, and is influenced by the flow resistance of media such as slurry and the like, and the locking cover 7 is provided with the reversed thread, the axial moving direction of the locking cover 7 is always opposite to that of the locking nut 5, so that the locking nut 5 is ensured to be always in a pressing state and not loosened, and the anti-loosening purpose is achieved; further, after the position of locking lid 7 is confirmed, insert the bolt and can make locking lid 7 can't rotate in first fixed orifices 8 and the second fixed orifices 9, strengthen the anticreep effect, what need to explain here is that, when locking lid during production, just need foresee the position of second fixed orifices 9, guarantee to match in the position of first fixed orifices 8.

Preferably, the locking cap 7 is connected with a projection 10, which facilitates the rotation of the locking cap 7, and in fact, the structure facilitating the rotation of the locking cap 7 may be considered according to the specific situation.

Preferably, lock nut 5 is the lock nut of hexagonal band base ring, and such design is convenient for cooperate with locking lid 7, plays the effect that can be pressed the blank, in fact, also can consider lock nut 5's selection according to particular case.

Preferably, there are at least three first fixing holes 8, which is designed to better adapt to the position of the locking cap 7 after screwing, and in fact, the number of first fixing holes 8 can be considered according to specific situations.

Preferably, locking lid 7 is steel locking lid, and such design guarantees the intensity of locking lid 7, and in fact, also can consider the material of locking lid 7 to select according to particular case.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a rotatory preventer rubber core nut locking loosening prevention mechanism which characterized in that: including hanger (1), hanger (1) is equipped with through-hole (2), connecting screw (3) have been placed in through-hole (2), connecting screw (3) one end threaded connection has gluey core (4), connecting screw (3) other end threaded connection has lock nut (5), hanger (1) is equipped with screw thread (6), screw thread (6) threaded connection has locking lid (7), locking lid (7) are the cavity cylindricality structure of L type for the cross-section, hanger (1) in the position of screw thread (6) is equipped with a plurality of first fixed orificess (8), locking lid (7) be equipped with second fixed orifices (9) that first fixed orifices (8) position corresponds, a plurality of second fixed orifices (9) the direction slope setting of screw thread (6), connecting screw thread of connecting screw (3) with the screw thread of screw thread (6) is opposite, first fixed orifices (8) with second fixed orifices (9) match the bolt in the lump.

2. The anti-loosening mechanism for the rubber core nut of the rotary blowout preventer as claimed in claim 1, wherein: the locking cover (7) is connected with a convex block (10).

3. The anti-loosening mechanism for the rubber core nut of the rotary blowout preventer as claimed in claim 2, wherein: and the locking nut (5) is a hexagonal locking nut with a bottom ring.

4. The anti-loosening mechanism for the rubber core nut of the rotary blowout preventer as claimed in claim 3, wherein: the number of the first fixing holes (8) is at least three.

5. The anti-loosening mechanism for the rubber core nut of the rotary blowout preventer as claimed in claim 4, wherein: the locking cover (7) is a steel locking cover.