CN220015097U - Misoperation-preventing mechanical locking device and misoperation-preventing system of wellhead plug connector - Google Patents

Abstract

The utility model provides an anti-misoperation mechanical locking device and an anti-misoperation system of a wellhead plug connector, wherein the locking device comprises a body, a slip locking outer cylinder, a mechanical locking ring and a slideway ring, and the slip locking outer cylinder is sleeved on the periphery of the lower part of the body; the slide ring is detachably and fixedly connected with the body, is arranged at the upper end of the mechanical locking ring, and is provided with a plurality of W-shaped grooves of a circle on the outer circle surface; the mechanical locking ring is arranged at the upper end of the slip locking outer cylinder and is movably connected with the body, the circumferential direction of the upper end of the mechanical locking ring is toothed, guide pins are uniformly distributed on the circumferential direction of the mechanical locking ring, and the guide pins slide in the W-shaped groove to realize the on-off circulation state of the slip. The misoperation prevention system comprises the misoperation prevention mechanical locking device of the wellhead plug connector. The locking device provided by the utility model adopts hydraulic locking and mechanical locking, so that double locking insurance is realized. The misoperation prevention system provided by the utility model improves the operation safety.

Description

Misoperation-preventing mechanical locking device and misoperation-preventing system of wellhead plug connector

Technical Field

The utility model relates to the technical field of coiled tubing operation, in particular to an anti-misoperation mechanical locking device and an anti-misoperation system of a wellhead plug connector.

Background

The wellhead plug connector is a wellhead quick connecting device and is arranged at a frequently detached part of a wellhead, namely between the wellhead and a coiled tubing blowout preventer, so that the hydraulic quick opening and connecting functions are achieved. The wellhead plug connector realizes remote wellhead alignment connection of blowout preventer pipe strings, replaces the traditional manual union connection mode, reduces personnel overhead operation, enables operators to be far away from a wellhead high-pressure area, and improves operation safety and efficiency. The wellhead plug connector is an important device of the wellhead, and the safety and the reliability of the wellhead plug connector are increasingly valued, so that the misoperation-preventing mechanical locking device and the misoperation-preventing system for the wellhead plug connector have important significance.

The Chinese patent with the application number of CN201921201668.7 and the name of a claw type wellhead remote plug connector discloses a claw type wellhead remote plug connector suitable for the field of petroleum drilling equipment, and the claw type wellhead remote plug connector comprises an upper connector special for plug and a lower connector arranged at a wellhead. The lower joint is sequentially provided with a lower flange and an upper flange, and the outer wall of the upper flange is provided with a remote locking mechanism and a safety locking mechanism for locking the upper joint special for plugging. The device realizes the automatic alignment, remote quick connection locking and remote release wellhead replacement of the blowout preventer pipe string remote wellhead through remote power control, replaces the traditional union connection mode and the manual alignment, tightening and backing-out union nut operation mode when the blowout preventer pipe string is aligned, connected and disassembled at the wellhead, also avoids manual climbing of a higher wellhead platform from top to bottom, reduces the times of operation of a personnel high-pressure area, improves the operation efficiency, reduces the labor intensity and the safety risk of personnel, and also provides possibility for reducing wellhead operators. However, the device is different from the structure of the utility model, and has no double locking insurance of hydraulic locking and mechanical locking.

Disclosure of Invention

The present utility model is directed to solving one or more of the problems of the prior art, including the shortcomings of the prior art. For example, one of the purposes of the present utility model is to provide a novel, reasonable, safe and reliable mechanical locking device for preventing misoperation of a wellhead plug connector. As another example, another object of the present utility model is to provide an anti-misoperation system of a wellhead plug connector, which can reduce risk of high-altitude operation and ensure operation safety.

In order to achieve the above purpose, according to one aspect of the present utility model, there is provided an anti-misoperation mechanical locking device for a wellhead plug connector, the locking device includes a body, a slip locking outer cylinder, a mechanical locking ring and a slideway ring, wherein the slip locking outer cylinder is sleeved on the periphery of the lower portion of the body; the slide ring is detachably and fixedly connected with the body, is arranged at the upper end of the mechanical locking ring, and is provided with a plurality of W-shaped grooves of a circle on the outer circle surface; the mechanical locking ring is arranged at the upper end of the slip locking outer cylinder and is movably connected with the body, the circumferential direction of the upper end of the mechanical locking ring is toothed, guide pins are uniformly distributed on the circumferential direction of the mechanical locking ring, and the guide pins slide in the W-shaped groove to realize the on-off circulation state of the slip.

According to one or more exemplary embodiments of an aspect of the present utility model, the slip locking outer cylinder may be provided with an upper hydraulic control port and a lower hydraulic control port, the upper hydraulic control port is located below the mechanical locking ring, the lower hydraulic control port is spaced a predetermined distance from the upper hydraulic control port and located below the upper hydraulic control port, and the upper hydraulic control port or the lower hydraulic control port is connected with a hydraulic control pipeline of the plug-in device control device to form a hydraulic control force, so that the slip locking outer cylinder is pushed to move up or down to achieve locking or unlocking.

According to one or more exemplary embodiments of an aspect of the present utility model, the W-shaped groove may be provided with five points A, B, C, D and E, where point a is a starting point, point B is a locking point, point C is a half unlocking point, point D is a locking point, and point E is an unlocking point.

According to one or more exemplary embodiments of an aspect of the present utility model, a plurality of holes may be uniformly formed in the circumferential direction of the mechanical locking ring, the guide pin may be disposed in the holes, and a spring may be further disposed in the holes, and the spring is located at the left end of the guide pin.

According to one or more exemplary embodiments of an aspect of the present utility model, the mechanical locking ring and the slip locking outer cylinder may be connected by a steel ball.

Further, the steel balls can be uniformly distributed along the circumferential direction of the mechanical locking ring and positioned below the pore canal.

According to one or more exemplary embodiments of an aspect of the present utility model, a stopper may be disposed above the W-shaped groove to prevent malfunction.

According to one or more exemplary embodiments of an aspect of the present utility model, the tip of each tooth of the mechanical locking ring may be provided with a groove matching the stopper.

According to one or more exemplary embodiments of an aspect of the utility model, the on-off cycle state of the slip may include open, semi-unlocked, and unlocked.

Another aspect of the utility model provides an anti-mishandling system for a wellhead plug connector, which may include an anti-mishandling mechanical locking device for a wellhead plug connector as described above.

Compared with the prior art, the utility model has the beneficial effects that at least one of the following contents is included:

(1) The misoperation-preventing mechanical locking device of the wellhead plug connector can improve the safety of the wellhead plug connector;

(2) The misoperation prevention system for the wellhead plug connector can reduce potential safety hazards and reduce operation risks.

Drawings

The foregoing and other objects and features of the utility model will become more apparent from the following description taken in conjunction with the accompanying drawings in which:

fig. 1 shows a schematic structural view of a locking device according to an exemplary embodiment of the present utility model;

FIG. 2 shows a schematic cross-sectional view of the locking device of FIG. 1 in the direction A-A;

FIG. 3 shows a schematic view of the construction of a slideway loop;

FIG. 4 shows a front view of a slideway loop;

FIG. 5 shows a schematic view of the sliding track of the guide pin;

FIG. 6 shows a schematic structural view of a mechanical locking ring;

figure 7 shows a front view of the mechanical locking ring;

FIG. 8 shows a schematic cross-sectional view of the mechanical locking ring of FIG. 7 in the direction A-A;

FIG. 9 shows the mechanical locking ring and the slip ring in a slip locked state;

FIG. 10 shows the mechanical locking ring and the slip ring in a slip half-locked state;

fig. 11 shows the mechanical locking ring and the slip ring in an unlocked state of the slips.

Reference numerals illustrate:

the device comprises a body, a 2-slip locking outer cylinder, a 3-mechanical locking ring, a 31-pore canal, a 32-guide pin, a 33-spring, a 34-groove, a 4-slideway ring, a 41-W-shaped groove, a 42-limiting block, a 5-steel ball, a 6-upper hydraulic control port, a 7-lower hydraulic control port and an 8-slip.

Detailed Description

Hereinafter, an anti-misoperation mechanical locking device and an anti-misoperation system of a wellhead plug connector according to the present utility model will be described in detail with reference to the accompanying drawings and exemplary embodiments.

It should be noted that the terms "first," "second," "third," "a," "B," "C," "D," "E," and the like are merely for convenience of description and for convenience of distinction and are not to be construed as indicating or implying relative importance. "upper", "lower", "outer", "left", "middle", etc. are for convenience of description and constitute relative orientations or positional relationships only, and do not indicate or imply that the components referred to must have that particular orientation or position.

Fig. 1 shows a schematic structural view of a locking device according to an exemplary embodiment of the present utility model; FIG. 2 illustrates a cross-sectional view of a locking device according to an exemplary embodiment of the present utility model; FIG. 3 shows a schematic view of the construction of a slideway loop; FIG. 4 shows a front view of a slideway loop; FIG. 5 shows a schematic view of the sliding track of the guide pin; FIG. 6 shows a schematic structural view of a mechanical locking ring; figure 7 shows a front view of the mechanical locking ring; FIG. 8 shows a schematic cross-sectional view of the mechanical locking ring of FIG. 7 in the direction A-A; FIG. 9 shows the mechanical locking ring and the slip ring in a slip locked state; FIG. 10 shows the mechanical locking ring and the slip ring in a slip half-locked state; fig. 11 shows the mechanical locking ring and the slip ring in an unlocked state of the slips.

In a first exemplary embodiment of the present utility model, as shown in fig. 2, an anti-misoperation mechanical locking device of a wellhead plug connector mainly comprises a body 1, a slip locking outer cylinder 2, a mechanical locking ring 3 and a slideway ring 4.

As shown in fig. 2, slips 8 are provided on the wall of the body 1. The slip locking outer cylinder 2 is sleeved on the surface of the body 1 and is positioned at the lower part of the body 1. Here, the body refers to a plug connector body. The slide ring 4 is detachably and fixedly connected with the body 1, and can be connected with the body through threads. As shown in fig. 1, a slideway ring 4 is located at the upper end of the mechanical locking ring 3. As shown in fig. 3, the outer circumferential surface of the slideway ring 4 is provided with a W-shaped groove 41 of a circle, that is, a plurality of W-shaped grooves 41 are connected to form a smooth groove-shaped track around the outer surface of the slideway ring 4. The groove-shaped track is the movement track of the guide pin, and one W-shaped groove is a switch circulation action of the slips. As shown in fig. 2, a mechanical locking ring 3 is arranged at the upper end of the slip locking outer cylinder 2 and is movably connected with the body 1. As shown in fig. 6, the mechanical locking ring 3 has a toothed structure at the upper end in the circumferential direction. As shown in fig. 2, the mechanical locking ring 3 is provided with guide hole pins 32 uniformly distributed in the circumferential direction. The slips locking outer cylinder can move upwards along the body under the action of hydraulic control force, and at the moment, the guide pin can slide in the W groove, so that the on-off circulation state of the slips is realized. Here, the on-off cycle state of the slips may include open, semi-unlocked, and unlocked.

In the present exemplary embodiment, as shown in fig. 5, five points A, B, C, D and E, which form the sliding track of the guide pin, may be provided in the W-shaped groove. The point A is a starting point, the point B is a locking point, the point C is a half unlocking point, the point D is a locking point, and the point E is an unlocking point. When the clamping tile is required to be locked, the clamping tile can be locked only through one hydraulic control force operation, namely the guide pin slides from A to B. When the slip is required to be unlocked, the slip can be unlocked by a cyclic action of on-off-on, namely the sliding track of the guide pin is B-C-D-E.

In the present exemplary embodiment, as shown in fig. 8, a plurality of holes 31 may be uniformly formed in the circumferential direction of the mechanical locking ring 3, and the holes 31 are located at the bottoms of the teeth of the mechanical locking ring 3. As shown in fig. 2, the guide pin 32 may be provided in the duct 31, and a spring 33 may be further provided in the duct 31, the spring 33 being located at the left end of the guide pin 32. Because the slope is formed between each end point in the W-shaped groove, the spring can enable the guide pin to be tightly propped against the bottom of the W-shaped groove from deep to shallow, and the whole locking ring is prevented from reversing. For example, during the process from point a to point B, the spring and guide pin will climb from low to high, and will bottom out (prevent reverse) after reaching point B, thereby entering the next cycle from point B to point C.

In this exemplary embodiment, a hemispherical groove may be formed on the wall of the mechanical locking ring, a hemispherical groove corresponding to the hemispherical groove of the mechanical locking ring may be formed on the wall of the slip locking outer cylinder, and the mechanical locking ring and the slip locking outer cylinder may be connected by providing steel balls in the two hemispherical grooves. As shown in fig. 2, a steel ball 5 is provided between the wall of the mechanical locking ring 3 and the outer wall of the slip locking outer cylinder 2.

Further, the mechanical locking ring and the slip locking outer cylinder can be connected through a plurality of steel balls. The steel balls can be uniformly distributed along the circumferential direction of the mechanical locking ring, and are positioned below the pore canal.

In the present exemplary embodiment, as shown in fig. 2, the slip locking outer cylinder 2 may be provided with an upper pilot port 6 and a lower pilot port 7, the lower pilot port 7 being spaced apart from the upper pilot port 6 by a certain distance. The upper hydraulic control port 6 is positioned below the mechanical locking ring 3 and above the slips 8, and the lower hydraulic control port 7 is positioned below the slips 8. The upper hydraulic control port is connected with a hydraulic control pipeline (off) of the plug-in device control device, hydraulic control force is formed in the wellhead plug-in connector, and the slip locking outer cylinder is pushed to move upwards to achieve locking. The lower hydraulic control port is connected with a hydraulic control pipeline (on) of the plug-in device control device, hydraulic control force is formed in the wellhead plug-in connector, and the slip locking outer barrel is pushed to move downwards to unlock.

In the present exemplary embodiment, as shown in fig. 4, a stopper 42 may be provided above each W-shaped groove 41.

In the present exemplary embodiment, as shown in fig. 7, the tip of each tooth of the mechanical locking ring 3 may be provided with a groove 34 that matches the stopper. Here, the groove may be a T-shaped groove. When the mechanical locking ring moves upwards and rotates, the T-shaped inclined surface of the limiting block can be contacted with the inclined surface of the T-shaped groove of the mechanical locking ring, so that the guide pin is not subjected to acting force. In addition, the limiting block also has the function of preventing misoperation through mechanical locking. The limiting block is matched with the groove, so that the mechanical locking ring cannot move upwards at the point B and the point C, and the unlocking and the separation of the pluggable connector are avoided.

A second exemplary embodiment of the present utility model provides an anti-mishandling mechanical locking device for a wellhead plug connector. The locking device mainly comprises a slip locking outer cylinder, a mechanical locking ring, a slideway ring, a guide pin, a steel ball, a spring, a slip, a body and other parts. N guide pins and springs are installed in the mechanical locking ring. The mechanical locking ring is connected with the slip locking outer cylinder through n steel balls. A W-shaped groove of a circle is designed at the outer circle of the slideway ring, the slip locking outer cylinder can move upwards along the body under the action of hydraulic control force, and the guide pin can slide in the W-shaped groove under the action of the hydraulic control force, so that the slip is opened, and the slip is in three states of half unlocking and unlocking. One W-groove is a switching cycle of the slips. Five points A, B, C, D, E are arranged in the W-shaped groove, wherein the point A is a starting point, the point B is a locking point, the point C is a half unlocking point, the point D is a locking point, and the point E is an unlocking point. These five points form the track of movement of the guide pins, and the opening and closing of the slips is achieved by mounting the guide pins fixed to the mechanical locking ring. When the clamping tile is required to be locked, the clamping tile can be locked by only one hydraulic control force operation, and when the clamping tile is required to be unlocked, the clamping tile can be unlocked by a circulating action of opening, closing and opening. Each W-shaped groove is provided with a limiting block, and the upper end of the mechanical locking ring is provided with a groove matched with the limiting block of the slideway ring. The limiting block has two functions: firstly, the locking device is used for preventing misoperation by mechanical locking; secondly, when the mechanical locking ring moves upwards and rotates, the T-shaped inclined surface of the limiting block can be contacted with the inclined surface of the T-shaped groove of the mechanical locking ring, so that the guide pin does not bear acting force.

The working principle of the misoperation-preventing mechanical locking device of the wellhead plug connector comprises a locking principle and an unlocking principle.

(1) The locking principle.

When the clamp is required to be closed, a hydraulic control pipeline (closing) of the plug control device is connected with an upper hydraulic control port (namely the plug hydraulic control port (closing)), the slip locking outer barrel moves downwards along the body under the action of hydraulic control force, and at the moment, the guide pin slides from the point A to the point B of the W-shaped groove of the slideway ring. Fig. 9 shows the position structure of the locking ring and the slideway ring when the guide pin is positioned at the point B, and the state is that the slips are locked.

(2) Unlocking principle.

When the slips are required to be opened, namely, unlocked, a hydraulic control pipeline of the plug-in device control device is connected with a lower hydraulic control port (namely, the plug-in device hydraulic control port (opening)), the slip locking outer cylinder moves upwards along the body under the action of hydraulic control force, at the moment, the guide pin slides from the point B to the point C of the W-shaped groove of the slideway ring, and fig. 10 shows the position structure of the locking ring and the slideway ring when the guide pin is positioned at the point C, and at the moment, the slips are in a semi-unlocked state. Then, the steering operation of the hydraulic oil way needs to be performed once, the steering pin is driven to slide from the point C to the point D of the W-shaped groove from the opening to the closing, the hydraulic oil way is steered to the opening again and the hydraulic force is applied, the steering pin slides from the point D to the point E of the W-shaped groove, fig. 11 shows the position structure of the mechanical locking ring and the slideway ring when the steering pin is positioned at the point E, and the slideway ring is separated from the mechanical locking ring, so that the slips are unlocked when the slips are opened.

A third exemplary embodiment of the present utility model provides an anti-misoperation system of a wellhead plug connector, where the anti-misoperation system may include the anti-misoperation mechanical locking device of the wellhead plug connector described in the first exemplary embodiment and/or the second exemplary embodiment.

In summary, the advantages of the present utility model include at least one of the following:

(1) The misoperation-preventing mechanical locking device of the wellhead plug connector provided by the utility model has novel, compact and reasonable structure, and is safe and reliable in use;

(2) The misoperation-preventing mechanical locking device of the wellhead plug connector adopts hydraulic locking and mechanical locking to realize double locking insurance;

(3) The misoperation prevention system for the wellhead plug connector can reduce operation risks.

While the anti-misoperation mechanical locking device and the anti-misoperation system of the wellhead plug connector of the present utility model have been described above by combining exemplary embodiments, it should be apparent to those skilled in the art that various modifications and changes can be made to the exemplary embodiments of the present utility model without departing from the spirit and scope defined in the claims.

Claims (10)

1. An anti-misoperation mechanical locking device of a wellhead plug connector is characterized by comprising a body, a slip locking outer cylinder, a mechanical locking ring and a slideway ring, wherein,

the slip locking outer cylinder is sleeved on the periphery of the lower part of the body;

the slide ring is detachably and fixedly connected with the body, is arranged at the upper end of the mechanical locking ring, and is provided with a plurality of W-shaped grooves of a circle on the outer circle surface;

the mechanical locking ring is arranged at the upper end of the slip locking outer cylinder and is movably connected with the body, the circumferential direction of the upper end of the mechanical locking ring is toothed, guide pins are uniformly distributed on the circumferential direction of the mechanical locking ring, and the guide pins slide in the W-shaped groove to realize the on-off circulation state of the slip.

2. The misoperation-preventing mechanical locking device of wellhead plug connector according to claim 1, wherein an upper hydraulic control port and a lower hydraulic control port are arranged on the slip locking outer cylinder, the upper hydraulic control port is located below the mechanical locking ring, the lower hydraulic control port is spaced a preset distance from the upper hydraulic control port and located below the upper hydraulic control port, the upper hydraulic control port or the lower hydraulic control port is connected with a hydraulic control pipeline of a plug control device to form a hydraulic control force, and the slip locking outer cylinder is pushed to move upwards or downwards to realize locking or unlocking.

3. The mechanical locking device for preventing misoperation of a wellhead plug connector according to claim 1, wherein five points A, B, C, D and E are arranged in the W-shaped groove, wherein point A is a starting point, point B is a locking point, point C is a half unlocking point, point D is a locking point, and point E is an unlocking point.

4. The misoperation-preventing mechanical locking device of wellhead plug connector according to claim 1, wherein a plurality of holes are uniformly distributed in the circumferential direction of the mechanical locking ring, the guide pins are arranged in the holes, springs are further arranged in the holes, and the springs are positioned at the left ends of the guide pins.

5. The anti-misoperation mechanical locking device of wellhead plug connector according to claim 4, wherein the mechanical locking ring is connected with the slip locking outer barrel through steel balls.

6. The mechanical locking device for preventing misoperation of a wellhead plug connector according to claim 5, wherein the steel balls are uniformly distributed along the circumferential direction of the mechanical locking ring and are positioned below the pore canal.

7. The mechanical locking device for preventing misoperation of a wellhead plug connector according to claim 1, wherein a limiting block is arranged above the W-shaped groove to prevent misoperation.

8. The anti-mishandling mechanical locking device of a wellhead plug connector according to claim 7, wherein the tip of each tooth of the mechanical locking ring is provided with a recess matching the stopper.

9. The anti-mishandling mechanical locking device of a wellhead plug connector of claim 1, wherein the on-off cycling state of the slips comprises open, semi-unlocked and unlocked.

10. An anti-misoperation system of a wellhead plug connector, characterized in that the anti-misoperation system comprises an anti-misoperation mechanical locking device of the wellhead plug connector according to any one of claims 1 to 9.