阅读说明：本技术 一种围箍装置 (Hoop device ) 是由 杨振涛 孙连会 李纬 田中太 王艳杰 张艳辉 黄树 陈辉 王铁峰 董保山 霍洪涛 于 2019-11-07 设计创作，主要内容包括：本发明公开了一种围箍装置,属于油气开发领域。该围箍装置包括：开合式设置的两个半圆筒形本体；用于锁紧两个半圆筒形本体的锁紧机构；设于半圆筒形本体底部的半圆环形承重体；设于任一半圆筒形顶部的顶板,且顶板上设置有中心通孔和旁通孔；穿过中心通孔且两端分别位于顶板两侧的升降杆；设置于升降杆下端的堵液件；设于顶板外侧,且用于对升降杆进行升降作业的升降控制机构；设于旁通孔处,且与半圆筒形本体的内腔连通的呼吸阀机构。该围箍装置能够从油管接箍处对油管内腔中的液体进行全方位地封堵截流,防止其涌出,具有良好的封堵效果,而且该围箍装置仅围设于油管接箍外部,可以设计成较小的体积,不会不影响油气作业的正常操作。(The invention discloses a hoop device, and belongs to the field of oil and gas development. This enclose hoop device includes: two semi-cylindrical bodies which are arranged in an opening and closing manner; a locking mechanism for locking the two semi-cylindrical bodies; the semicircular ring-shaped bearing body is arranged at the bottom of the semicircular cylindrical body; the top plate is arranged at the top of any semi-cylindrical part, and a central through hole and a bypass hole are arranged on the top plate; the lifting rod penetrates through the central through hole, and two ends of the lifting rod are respectively positioned on two sides of the top plate; the liquid blocking piece is arranged at the lower end of the lifting rod; the lifting control mechanism is arranged on the outer side of the top plate and is used for lifting the lifting rod; the breather valve mechanism is arranged at the bypass hole and communicated with the inner cavity of the semi-cylindrical body. This hoop device can follow tubing coupling department and carry out the shutoff of all-round ground to the liquid in the oil pipe inner chamber and dams, prevents that it from gushing out, has good shutoff effect, and this hoop device only encloses and locates tubing coupling outside moreover, can design into less volume, can not influence the normal operating of oil gas operation.)

1. A hoop device, comprising: two semi-cylindrical bodies which are arranged in an opening and closing manner;

the locking mechanism is used for locking the two semi-cylindrical bodies;

the semicircular annular bearing body is arranged at the bottom of the semicircular cylindrical body;

the top plate is arranged at the top of any one semi-cylindrical part, and a central through hole and a bypass hole are formed in the top plate;

the lifting rod penetrates through the central through hole, and two ends of the lifting rod are respectively positioned on two sides of the top plate;

the liquid blocking piece is arranged at the lower end of the lifting rod;

the lifting control mechanism is arranged on the outer side of the top plate and is used for lifting the lifting rod;

and the breather valve mechanism is arranged at the bypass hole and communicated with the inner cavity of the semi-cylindrical body.

2. The strapping device of claim 1 wherein the fluid stop comprises: the pressing plate is fixedly connected with the lower part of the lifting rod;

the first limiting piece is fixedly connected with the lower end part of the lifting rod;

and the elastic sealing element is clamped between the pressure plate and the first limiting part.

3. The strapping device of claim 1 wherein the elevation control mechanism comprises: the elastic piece is sleeved on the lifting rod above the top plate;

the second limiting piece is fixedly connected with the upper end part of the lifting rod and is used for preventing the elastic piece from being separated from the lifting rod;

the fixed bracket is arranged on the top plate;

the eccentric disc is rotatably arranged on the fixed support and is used for pressing and locking the lifting rod;

and the rotating handle is connected with the eccentric disc.

4. The strapping device of claim 3 wherein the mounting bracket comprises: two side plates which are oppositely arranged;

the lift control mechanism further includes: and the two ends of the positioning shaft are respectively connected with the two side plates, and the positioning shaft penetrates through the center of the eccentric disc.

5. The strapping device as claimed in claim 3, wherein the stroke of the lifting rod is equal to the difference between the maximum radial distance and the minimum radial distance of the eccentric disc.

6. The strapping device of claim 1 wherein the breather valve mechanism comprises: the breathing pipe is connected with the bypass hole and penetrates through the liquid blocking piece to extend into the semi-cylindrical body;

the ball seat is connected with the breathing tube, and a breathing hole is formed in the bottom wall of the ball seat;

the ball body is positioned in the ball seat and used for plugging the breathing hole.

7. The strapping device according to claim 6, wherein the ball seat is provided with a stop block inside for preventing the ball from entering the breathing tube.

8. The strapping device of claim 1 wherein the first side ends of the two semi-cylindrical bodies are pinned together.

9. The strapping device of claim 2 wherein the locking mechanism comprises: the locking seats are positioned outside the second side ends of the two semi-cylindrical bodies;

a lock handle assembly connected to the pressure plate to be raised and lowered with the lift rod, the lock handle assembly including a lock handle;

when the lifting rod descends, the lock handle is inserted into the locking seat to realize locking;

when the lifting rod ascends, the lock handle is separated from the locking seat to realize unlocking.

10. The hoop device of claim 9, wherein the upper portions of the second side ends of the two semi-cylindrical bodies are provided with longitudinal notches, respectively, for providing a stroke space for the lock handle assembly.

Technical Field

The invention relates to the field of oil and gas development, in particular to a hoop device.

Background

In the oil gas development process, an oil pipe is used as an operation tool for entering a well in the stages of oil testing, oil extraction, water injection, measures and the like, one end of the oil pipe is in threaded connection with a coupling, the other end of the oil pipe is in threaded connection with a check valve or a pump pipe column, when relevant parts such as an oil drain device and the like are not installed on the oil pipe, liquid mainly comprising oil and water in the oil pipe can be caused to go upwards along with the pipe column, and the liquid in the oil pipe is excited due to vibration of the oil pipe and pressure fluctuation in the well, so that the liquid is induced to flow out of the oil pipe.

At present, a large liquid collecting device is mainly arranged around an oil pipe to collect spilled liquid in time.

The inventor finds that at least the following problems exist in the prior art:

utilize collection liquid device to collect liquid, have the risk of leaking the collection on the one hand, on the other hand, collection liquid device volume is generally great, can excessively occupy the normal operating space of oil gas operation.

Disclosure of Invention

In view of the above, the present invention provides a hoop device, which can solve the above technical problems.

Specifically, the method comprises the following technical scheme:

a hoop device, the hoop device comprising: two semi-cylindrical bodies which are arranged in an opening and closing manner;

the locking mechanism is used for locking the two semi-cylindrical bodies;

the semicircular annular bearing body is arranged at the bottom of the semicircular cylindrical body;

the top plate is arranged at the top of any one semi-cylindrical part, and a central through hole and a bypass hole are formed in the top plate;

the lifting rod penetrates through the central through hole, and two ends of the lifting rod are respectively positioned on two sides of the top plate;

the liquid blocking piece is arranged at the lower end of the lifting rod;

the lifting control mechanism is arranged on the outer side of the top plate and is used for lifting the lifting rod;

and the breather valve mechanism is arranged at the bypass hole and communicated with the inner cavity of the semi-cylindrical body.

In one possible implementation, the liquid blocking member includes: the pressing plate is fixedly connected with the lower part of the lifting rod;

the first limiting piece is fixedly connected with the lower end part of the lifting rod;

and the elastic sealing element is clamped between the pressure plate and the first limiting part.

In one possible implementation, the lift control mechanism includes: the elastic piece is sleeved on the lifting rod above the top plate;

the second limiting piece is fixedly connected with the upper end part of the lifting rod and is used for preventing the elastic piece from being separated from the lifting rod;

the fixed bracket is arranged on the top plate;

the eccentric disc is rotatably arranged on the fixed support and is used for pressing and locking the lifting rod;

and the rotating handle is connected with the eccentric disc.

In one possible implementation, the fixing bracket includes: two side plates which are oppositely arranged;

the lift control mechanism further includes: and the two ends of the positioning shaft are respectively connected with the two side plates, and the positioning shaft penetrates through the center of the eccentric disc.

In a possible realization, the stroke of the lifting rod is equal to the difference between the maximum radial distance and the minimum radial distance of the eccentric disk.

In one possible implementation, the breathing valve mechanism comprises: the breathing pipe is connected with the bypass hole and penetrates through the liquid blocking piece to extend into the semi-cylindrical body;

the ball seat is connected with the breathing tube, and a breathing hole is formed in the bottom wall of the ball seat;

the ball body is positioned in the ball seat and used for plugging the breathing hole.

In a possible implementation manner, a stop block is arranged inside the ball seat and used for preventing the ball body from entering the breathing tube.

In one possible implementation, the first side ends of the two semi-cylindrical bodies are pinned.

In one possible implementation, the locking mechanism includes: the locking seats are positioned outside the second side ends of the two semi-cylindrical bodies;

a lock handle assembly connected to the pressure plate to be raised and lowered with the lift rod, the lock handle assembly including a lock handle;

when the lifting rod descends, the lock handle is inserted into the locking seat to realize locking;

when the lifting rod ascends, the lock handle is separated from the locking seat to realize unlocking.

In a possible implementation manner, the upper parts of the second side ends of the two semi-cylindrical bodies are correspondingly provided with longitudinal notches for providing a stroke space for the lock handle assembly.

The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:

the hoop device provided by the embodiment of the invention can be arranged outside the tubing coupling in a surrounding manner so as to prevent liquid in the inner cavity of the tubing from flowing out of the tubing coupling. When the anti-slipping oil pipe coupling is used, the oil pipe coupling is tightly held through the two semi-cylindrical bodies, and the locking mechanism is used for locking, so that slipping is prevented. Wherein, the semi-circular bearing body bears the bottom of the tubing coupling. When the oil pipe is lifted up, the lifting control mechanism controls the lifting rod to descend and drives the liquid plugging piece to move downwards, so that the liquid plugging piece plugs the upper opening of the oil pipe coupling to prevent liquid in the oil pipe from flowing out. The breather valve mechanism can prevent liquid from ascending, but does not influence air from descending, when the liquid in the oil pipe is controlled by the wellhead liquid flow control device to leak from the lower opening, the air can enter the inner cavity of the oil pipe through the breather valve mechanism due to the existence of the breather valve mechanism, the vacuum influence is eliminated, and the continuous operation of the leakage flow is ensured. Therefore, the surrounding hoop device provided by the embodiment of the invention can be used for plugging and intercepting liquid in an inner cavity of an oil pipe from the oil pipe coupling in all directions, so that the liquid is prevented from overflowing, a good plugging effect is achieved, and the surrounding hoop device is only arranged outside the oil pipe coupling in a surrounding manner, so that the surrounding hoop device can be designed into a smaller size, and the normal operation of oil-gas operation cannot be influenced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a hoop device provided in an embodiment of the present invention in an open state;

FIG. 2 is a schematic structural view of a breather valve mechanism;

figure 3 is a schematic structural view of a hoop device provided by an embodiment of the present invention in a closed state;

fig. 4 is a schematic view of the connection relationship between the pressure plate and the linkage seat.

The reference numerals denote:

1-semi-cylindrical body, 2-locking mechanism, 201-locking seat, 202-locking handle,

203-linkage seat, 2031-first through hole, 2032-second through hole,

204-linkage bolt, 3-bearing body, 4-top plate, 5-lifting rod,

6-liquid blocking piece, 601-pressing plate, 6011-center hole, 6012-side hole,

602-first stop, 603-elastic seal,

7-a lifting control mechanism, 701-an elastic piece, 702-a second limit piece, 703-a fixed bracket,

704-eccentric disk, 705-stem, 706-positioning shaft,

8-a breathing valve mechanism, 801-a breathing tube, 802-a ball seat, 803-a breathing hole, 804-a ball body,

805-stop block, 9-handle.

Detailed Description

In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.

The embodiment of the invention provides a hoop device, as shown in the attached drawings 1 and 3, the hoop device comprises: two semi-cylindrical bodies 1 which are arranged in an opening and closing manner;

a locking mechanism 2 for locking the two semi-cylindrical bodies 1;

a semicircular ring-shaped bearing body 3 arranged at the bottom of the semicircular cylindrical body 1;

the top plate 4 is arranged at the top of any semi-cylindrical part, and a central through hole and a bypass hole are arranged on the top plate 4;

the lifting rod 5 penetrates through the central through hole, and two ends of the lifting rod are respectively positioned at two sides of the top plate 4;

a liquid blocking part 6 arranged at the lower end of the lifting rod 5;

a lifting control mechanism 7 which is arranged outside the top plate 4 and is used for lifting the lifting rod 5;

and the breather valve mechanism 8 is arranged at the bypass hole and communicated with the inner cavity of the semi-cylindrical body 1.

The hoop device provided by the embodiment of the invention can be arranged outside the tubing coupling in a surrounding manner so as to prevent liquid in the inner cavity of the tubing from flowing out of the tubing coupling. When the anti-slipping oil pipe coupling is used, the oil pipe coupling is tightly held through the two semi-cylindrical bodies 1, and the locking mechanism 2 is used for locking, so that slipping is prevented. Wherein, the semi-circular bearing body 3 bears the bottom of the tubing coupling. When the oil pipe is lifted, the lifting control mechanism 7 controls the lifting rod 5 to descend and drives the liquid plugging piece 6 to descend, so that the liquid plugging piece 6 plugs the upper opening of the oil pipe coupling to prevent liquid in the oil pipe from gushing out. The breather valve mechanism 8 can prevent liquid from ascending from this, but does not influence air from descending from this, when using well head liquid flow control device to control the interior liquid of oil pipe from the lower port earial drainage, because the existence of breather valve mechanism 8, can make the air get into the oil pipe inner chamber through it, eliminate the vacuum influence, ensure that the earial drainage goes on in succession. Therefore, the surrounding hoop device provided by the embodiment of the invention can be used for plugging and intercepting liquid in an inner cavity of an oil pipe from the oil pipe coupling in all directions, so that the liquid is prevented from overflowing, a good plugging effect is achieved, and the surrounding hoop device is only arranged outside the oil pipe coupling in a surrounding manner, so that the surrounding hoop device can be designed into a smaller size, and the normal operation of oil-gas operation cannot be influenced.

The two semi-cylindrical bodies 1 can be opened and closed, so that the two semi-cylindrical bodies can be conveniently encircled on a tubing coupling when being opened, and the matched locking mechanism 2 can be tightly held outside the tubing coupling when being closed. The two semi-cylindrical bodies 1 have the same structure and are symmetrically arranged.

The diameters of the inner cavities of the two semi-cylindrical bodies 1 are larger than the outer diameter of the tubing coupling by 2-4 mm, so that the installation is convenient, the centering is ensured during the installation, and the service life of the semi-annular bearing body 3 is prolonged.

The height of the inner cavity of the semi-cylindrical body 1 refers to the height from the upper end surface of the semi-annular bearing body 3 to the lower end surface of the top plate 4, and it can be understood that the height of the inner cavity is greater than the sum of the height of the tubing coupling, the height of the pressing plate 601, the height of the elastic sealing member 603 and the stroke of the lifting rod 5.

In the embodiment of the invention, the semicircular bearing body 3 is used for receiving the mass load of the tubing string below the tubing coupling on the upper plane of the tubing elevator, so the strength is enough, preferably the strength is higher than that of the tubing coupling, and the semicircular bearing body 3 can be prevented from being pressed frequently by the tubing to cause plastic deformation and finally damage.

In addition, the diameter of the inner cavity of the semicircular bearing body 3 can be 1-2 mm larger than the outer diameter of the oil pipe body below the oil pipe coupling, so that the installation difficulty caused by slight irregularity of the oil pipe body can be overcome on the premise of ensuring the stable bearing effect.

In the embodiment of the present invention, the top plate 4 may be disposed on the top of any one of the semi-cylindrical bodies 1, and in particular, on the semi-cylindrical bodies 1 that are relatively fixed (two semi-cylindrical bodies 1 may be disposed in an openable manner, one of the two semi-cylindrical bodies may be relatively fixed, and the other semi-cylindrical body may rotate relative to the other semi-cylindrical body to realize opening and closing). Wherein, the center through hole on the roof 4 is arranged at the center of the circle, and the bypass hole is arranged at the side of the center through hole.

It will be appreciated that the upper end of the lifting rod 5 is located above the top plate 4 and the lower end is located below the top plate 4. In the embodiment of the invention, when the lifting rod 5 descends to the dead point position, the liquid plugging member 6 can descend to plug the upper opening of the tubing coupling. As an example, as shown in fig. 1, the liquid blocking member 6 includes: a pressing plate 601 fixedly connected with the lower part of the lifting rod 5; a first stopper 602 fixedly connected to the lower end of the lift lever 5; an elastic seal 603 clamped between the pressure plate 601 and the first stop 602.

Since the elastic sealing member 603 is clamped between the pressing plate 601 and the first limiting member 602, the elastic sealing member 603 can be lifted at any time when the lifting rod 5 is lifted. By arranging the pressing plate 601, the omnibearing sealing effect of the elastic sealing element 603 can be ensured, the stress is uniform, and the sealing effect is prevented from being influenced by local deformation.

The diameter of the pressing plate 601 can be smaller than the diameter of the inner cavity of the semi-cylindrical body 1 by 1-2 mm, so that the vertical movement of the pressing plate can be guaranteed not to be hindered, and the pressing control effect on the elastic sealing element 603 can be guaranteed as far as possible.

The elastic sealing element 603 is a circular structure, and the diameter of the elastic sealing element can be 2-3 mm larger than the outer diameter of the tubing coupling, so that the full coverage effect of the elastic sealing element on an upper opening of the tubing coupling can be enhanced, and the sealing effect on the tubing coupling is enhanced. In one possible example, elastomeric seal 603 may be an oil-resistant rubber pad that can be oil-compliant, easy to machine, and more economical.

The pressing plate 601 may be in threaded connection with a lower portion of the lifting rod 5, and the first limiting member 602 may be in threaded connection with a lower end of the lifting rod 5. The first limiting member 602 may be a plate-shaped structure, such as a geometric shape of a circle, a square, or other shapes, as long as the limiting of the elastic sealing member 603 can be achieved. In one possible example, a nut adapted to the lifting rod 5 may be used as the first limiting member 602.

In the embodiment of the present invention, the lifting control mechanism 7 is used to control the lifting operation of the lifting rod 5, as an example, as shown in fig. 1, the lifting control mechanism 7 may include: an elastic member 701 sleeved on the lifting rod 5 above the top plate 4;

a second stopper 702 fixedly connected to the upper end of the lifting rod 5 for preventing the elastic member 701 from being separated from the lifting rod 5;

a fixing bracket 703 provided on the top plate 4;

an eccentric disc 704 rotatably provided on the fixed bracket 703 for pressing down and locking the lifting rod 5;

a stem 705 connected to the eccentric disc 704.

When the device is used, the eccentric disc 704 is driven to rotate by pressing down or lifting up the rotating handle 705, and because the rotating track of the eccentric disc 704 is irregular, the lifting rod 5 can be pressed down at a specific position, and the lifting rod 5 is locked at a bottom dead center position by matching with the elastic force of the elastic piece 701 to prevent the lifting rod from going upwards, so that the elastic sealing piece 603 is stably plugged at the upper opening of the tubing coupling.

Since the second stopper 702 is fixedly connected to the upper end of the lifting rod 5, when the eccentric disc 704 presses down the lifting rod 5, it can be understood that the eccentric disc 704 is in contact with the second stopper 702 at this time. For example, the second limiting member 702 may be a nut.

It is to be understood that the eccentric disc 704 means a circle center not located at the center of the middle portion thereof, but located at one side of the circle center.

In the embodiment of the present invention, the fixing bracket 703 is used to provide support for the whole lifting control mechanism 7, and as an example, the fixing bracket 703 may include: two side plates which are oppositely arranged;

further, the lift control mechanism 7 further includes: and a positioning shaft 706 having both ends connected to the two side plates, respectively, and the positioning shaft 706 penetrates the center of the eccentric disc 704.

The bottom of the two side plates is fixed on the top plate 4, and the two side plates are arranged oppositely, wherein the eccentric disc 704 is positioned between the two side plates, and the positioning is realized by the positioning shaft 706, and the eccentric disc rotates by taking the positioning shaft 706 as the center. As an example, the positioning shaft 706 may be connected to the two side plates by a pin or a bolt.

In the embodiment of the present invention, the stroke of the lifting rod 5 includes an upper stroke and a lower stroke, and the upper stroke and the lower stroke are equal and equal to the difference between the maximum radial distance and the minimum radial distance of the eccentric disc 704. It is understood that the maximum radial distance of the eccentric disk 704 refers to the maximum distance of the center of the eccentric disk 704 from the edge thereof, and the minimum radial distance refers to the minimum distance of the center of the eccentric disk 704 from the edge thereof. By limiting the stroke of the lifting rod 5 as described above, the side edge of the eccentric disc 704 corresponding to the minimum radial distance can be brought into contact with the lifting rod 5 (specifically, with the second limiting member 702 thereon), when the eccentric disc 704 exerts no pressure on the lifting rod 5, and the lifting rod 5 is at the dead point of the upper stroke under the support of the elastic member 701. When the eccentric disc 704 is rotated downward by the rotating handle 705, the side edge of the eccentric disc 704 corresponding to the maximum radial distance contacts the lift lever 5, which is equal to the pressure applied by the eccentric disc 704 to the lift lever 5 against the supporting elastic force of the elastic member 701, and the lift lever 5 is finally positioned at the lower dead point and is kept stable.

The elastic member 701 is located above the top plate 4 all the time, is sleeved on the lifting rod 5, and can be a helical compression spring, and can be compressed longitudinally to store energy by being pressed by the second limiting member 702 at the top of the lifting rod 5, and once the compression is released, the lifting rod 5 can be driven to move upwards for a limited distance.

The handle 705 may be a linear handle, which may be connected to a side edge of the eccentric disc 704, or may be connected to a side surface of the eccentric disc 704, as long as the eccentric disc 704 is conveniently driven to rotate.

In the embodiment of the invention, the breather valve mechanism 8 is utilized to eliminate the influence of the vacuum environment on the liquid discharge, thereby ensuring the continuity of the liquid discharge. As an example, as shown in fig. 2, a respiratory valve mechanism 8 provided by the embodiment of the present invention may include: a breathing pipe 801 which is connected with the bypass hole and extends into the semi-cylindrical body 1 through the liquid blocking piece 6; a ball seat 802 connected with the breathing tube 801, and a breathing hole 803 is arranged on the bottom wall of the ball seat 802; a ball 804 positioned in the ball seat 802 for blocking the breathing hole 803.

When the elastic sealing member 603 blocks the upper opening of the tubing coupling, the liquid inside the semi-cylindrical body 1 can enter the ball seat 802 through the breathing tube 801 and push the ball 804 to seat on the breathing hole 803, preventing the liquid from leaking. When liquid is drained, the ball 804 is pulled away from the breathing hole 803 by the liquid negative pressure, air enters the ball seat 802 and the inner cavity of the oil pipe from the breathing hole 803, and then the vacuum influence can be eliminated, and the liquid drainage can be continuously carried out.

Furthermore, a stop block 805 is arranged inside the ball seat 802 for preventing the ball 804 from entering the breathing tube 801, so as to ensure that air can smoothly enter the inner cavity of the tubing during liquid leakage.

As an example, the upper end of the breathing tube 801 may be connected to and in communication with the bottom side end of the ball seat 802, and the lower end of the breathing tube 801 passes through the pressing plate 601 and the elastic sealing member 603 in sequence. A breathing hole 803 is provided at the other side end of the bottom of the ball seat 802 opposite to the breathing tube 801. For example, the ball seat 802 may be cylindrical.

The stop block 805 may be disposed at a connection position between the breathing tube 801 and the ball seat 802, that is, a turning position of the breathing tube 801 toward the ball seat 802, and may be a stop plate disposed at the bottom of the ball seat 802 for limiting the ball 804 and preventing the ball from entering and blocking the breathing tube 801, without affecting the communication between the ball seat 802 and the breathing tube 801.

The breathing tube 801 may be a hollow tube with a chrome plated inner wall to facilitate not only corrosion protection but also sliding. The breathing tube 801 passes through the pressing plate 601 and the elastic sealing member 603, so that the lower end of the breathing tube is inserted into the semi-cylindrical body 1, wherein the breathing tube 801 is in interference fit with the tube passing hole on the elastic sealing member 603, so as to ensure the sealing function.

In the embodiment of the invention, the two semi-cylindrical bodies 1 can be opened and closed, so that the two semi-cylindrical bodies 1 can rotate relatively. In one possible example, the first side ends of two semi-cylindrical bodies 1 are pinned. Specifically, a double-lug-plate pin boss (two double-lug plates are arranged in parallel and oppositely with a slot therebetween) may be respectively provided at an upper portion and a lower portion of the first side end of the first semi-cylindrical body 1 (relatively fixed), a single-lug-plate pin boss may be respectively provided at an upper portion and a lower portion of the first side end of the second semi-cylindrical body 1, and the single-lug-plate pin boss may be inserted into a slot of the double-lug-plate pin boss at a corresponding position, and may be inserted by a fixing pin to realize the relative fixation. This enables the pinning of the two semi-cylindrical bodies 1 for opening or closing operations.

It will be appreciated that the platen 601, as shown in fig. 4, has a central hole 6011 in the middle and a side hole 6012 beside the central hole 6011, wherein the central hole 6011 is used for the passage of the lifting rod 5 and the side hole 6012 is used for the passage of the breathing tube 801.

After the two semi-cylindrical bodies 1 are closed, the locking mechanism 2 is used for locking, and in the liquid plugging operation process, the locking operation and the lifting operation of the lifting rod 5 are required. In order to improve the working efficiency, the embodiment of the invention synchronously carries out locking operation and lifting operation. In order to achieve the above object, the lock mechanism 2 may include: the locking seats 201 are positioned outside the second side ends of the two semi-cylindrical bodies 1; and a lock handle assembly connected to the pressing plate 601 to be lifted with the lifting rod 5, wherein the lock handle assembly includes the lock handle 202. When the lifting rod 5 descends, the lock handle 202 is inserted into the locking seat 201 to realize locking; when the lifting rod 5 ascends, the lock handle 202 is separated from the lock seat 201 to realize unlocking.

The locking mechanism 2 can synchronously carry out locking operation along with lifting operation by linking the lock handle 202 with the lifting rod 5, and when the lifting rod 5 descends to enable the annular sealing element to block the upper opening of the tubing coupling, the annular sealing element is locked and inserted into the locking seat to realize locking, so that smooth liquid blocking operation is ensured. On the contrary, when liquid plugging is not needed, the locking mechanism 2 is unlocked along with the rising of the lifting rod 5, and the disassembly operation of the surrounding hoop device on the tubing coupling is facilitated.

Based on the above, the lock handle is lifted synchronously with the lifting of the lifting rod 5, and in order to prevent interference, a longitudinal notch may be correspondingly arranged at the upper part of the second side ends of the two semi-cylindrical bodies 1 for providing a stroke space for the lock handle assembly.

The structure of the locking mechanism 2 is further described below with reference to specific examples:

as shown in fig. 1 and 3, a binaural board locking seat 201 (two binaural boards are oppositely disposed in parallel with a slot therebetween) may be respectively disposed on an upper portion and a lower portion of the second side end of the first semi-cylindrical body 1, and a single binaural board locking seat 201 may be respectively disposed on an upper portion and a lower portion of the second side end of the second semi-cylindrical body 1 and may be inserted into a slot of the binaural board locking seat 201 at a corresponding position.

Meanwhile, a first linkage seat 203 is connected to an outer wall of the pressing plate 601, the first linkage seat 203 is located outside a second side end of the first semi-cylindrical body 1, wherein, as shown in fig. 4, a first through hole 2031 and a second through hole 2032 are respectively arranged on the first linkage seat 203 along a front-back direction, wherein an upper end of the first lock handle 202 is fixedly connected (e.g., screwed) with the second through hole 2032. The locking mechanism 2 further comprises: a link bolt 204, the upper end of which is in threaded connection with the first through hole 2031; and a second linkage seat 203 which is in threaded connection with the lower part of the linkage bolt 204, and a second lock handle 202 is also in threaded connection with the second linkage seat 203. Thus, when the first linkage seat 203 moves up and down along with the pressing plate 601, the first lock lever 202 and the second lock lever 202 also move up and down. The first lock handle 202 and the second lock handle 202 can be inserted into the upper lock seat 201 and the lower lock seat 201, respectively (i.e. the lock handle 202 is inserted into the two-ear plate lock seat 201 and the single-ear plate lock seat 201 which are matched and inserted together), so as to realize locking. Meanwhile, the two lock handles 202 can simultaneously withdraw from the corresponding lock seats 201 along with the lifting rod 5, so as to realize unlocking.

Based on the above structure of the locking mechanism 2, the upper portions of the second side ends of the two semi-cylindrical bodies 1 are correspondingly provided with the longitudinal notches, which can be located between the lower surface of the top plate 4 and the upper plane of the double-lug plate locking seat located on the upper portion. The height of the longitudinal gap is greater than the stroke of the lifting rod 5, so as to ensure that the pressing plate 601 can smoothly drive the first linkage seat 203 to perform synchronous lifting motion.

In addition, in order to further optimize the structure of the hoop device provided by the embodiment of the invention, a rotary lifting ring can be connected to the center of the top of the fixed bracket 703, and a guide rope is hung below the construction hook to prevent the hoop device from falling in the air.

A handle 9 may be connected to the outer side of each of the two semi-cylindrical bodies 1 to facilitate the opening and closing operation.

The two semi-cylindrical bodies 1 can be formed by longitudinally dividing a cylinder from the middle part to ensure that the two bodies are the same.

The following is a brief description of the use process of the hoop device provided by the embodiment of the invention in the operation process of a certain travelling oil pipe elevator:

on the operation well head, the oil pipe chuck blocks the oil pipe body and ensures that oil pipe string is decided the height and hovers, and the top is the tubing coupling above the oil pipe body, and 2 rings of big hook hang 1 oil pipe elevator, and the rotatory bail is connected to the stay rope in the centre under the big hook coupler body to hang this hoop device:

encircling:

the handle is held to enable the first semi-cylindrical body to be sleeved into the tubing coupling in parallel, then the second semi-cylindrical body is made to approach to the first semi-cylindrical body, and the single lug plate locking seats on the upper portion and the lower portion of the second semi-cylindrical body respectively enter the slots of the double lug plate locking seats on the first semi-cylindrical body.

Locking and blocking liquid:

the rotating handle is grasped to rotate downwards, the side edge of the eccentric disc corresponding to the maximum radial distance is contacted with the lifting rod and gradually presses the lifting rod to move downwards to overcome the supporting force of the elastic piece, and the pressing plate controls the elastic sealing piece to cover and block the upper opening of the tubing coupling so that liquid does not flow outwards. Meanwhile, the first linkage seat connected with the pressure plate synchronously drives the first lock handle and the second lock handle to descend. The first lock handle and the second lock handle can be respectively inserted into the locking seat at the upper part and the locking seat at the lower part, so that locking is realized, namely the stress environment for covering and plugging the upper opening of the tubing coupling by the elastic sealing element is kept unchanged.

Lifting the oil pipe elevator:

the tubing elevator is closed after being sleeved into the tubing body, the tubing elevator is lifted, the lower planes of the two semicircular bearing bodies are located on the upper plane of the tubing elevator, the tubing chuck is opened, the elevator is continuously lifted until another tubing coupling of the downhole tubing string appears, the lifting of the tubing elevator is stopped, the tubing chuck on the lower part is closed, and the tubing elevator is lowered until the upper plane of the tubing elevator is separated from the lower planes of the two semicircular bearing bodies. In the process, the ball body in the breather valve mechanism enters the breather hole in the ball seat under the pushing of liquid, the channel is closed, the plugging effect of the elastic sealing element cannot be damaged, and the large-area pollution caused by the liquid in the inner cavity of the oil pipe which is scattered in the air is prevented. The oil pipe is disconnected, and the hydraulic oil pipe tongs can be separated from the oil pipe connecting screw thread connected above the oil pipe coupling in the well when the oil pipe is disconnected to the upper part.

Lifting an oil pipe and draining pipe liquid:

when the liquid in the inner cavity of the oil pipe is controlled to flow out from the lower opening by using the wellhead liquid flow control device, the oil pipe elevator is lifted, the oil pipe is connected to the position above the oil pipe coupling in the well, the liquid in the inner cavity of the oil pipe flows out from the lower opening, the ball body is pulled away from the breathing hole in the ball seat by the negative pressure of the liquid, and the air enters the ball seat and the inner cavity of the oil pipe, so that the vacuum influence is eliminated, and the continuous flow discharge is ensured.

Removing the encircling:

the broken-out oil pipe is obliquely and downwards discharged towards the ground, when the oil pipe coupling reaches a wellhead, the rotating handle is grabbed to rotate upwards, the side edge of the eccentric disc corresponding to the maximum radial distance is gradually far away from the top of the lifting rod, the supporting force of the elastic piece naturally drives the lifting rod to upwards recover, and the pressing plate and the elastic sealing piece release covering, blocking and contacting of the upper opening of the oil pipe coupling. Meanwhile, the first linkage seat connected with the pressure plate synchronously drives the two lock handles to withdraw from the corresponding locking seats, so that unlocking is realized. Subsequently, the second semi-cylindrical body is rotated outwardly by the grip, and the first semi-cylindrical body is immediately separated from the tubing coupling by its own weight.

In summary, the hoop device provided by the embodiment of the present invention has the following beneficial effects:

the eccentric disc controls the elastic sealing element to cover and plug the upper opening of the tubing coupling through the lifting rod and the core pressing plate, and the ball body in the breather valve mechanism enters the ball seat under the pushing of liquid to close a channel, so that the liquid in the inner cavity of the tubing is prevented from being scattered in the air to cause large-area pollution.

The oil pipe is lifted up after being broken off, liquid flow in the inner cavity of the oil pipe leaks from the lower opening, the ball body is pulled away from the ball seat by liquid negative pressure, air enters the inner cavity of the oil pipe, the vacuum influence is eliminated, the continuous drainage is ensured, and the construction speed is improved.

The mode that two semi-cylindrical bodies are used for enclosing and clamping the oil pipe coupling is utilized for connection, the action is few, the speed is high, and the method is suitable for a new process of lifting and lowering the oil pipe by a traveling oil pipe elevator and is advanced in boosting science and technology.

The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.