CN216950302U

CN216950302U - Well sealing device

Info

Publication number: CN216950302U
Application number: CN202123136740.2U
Authority: CN
Inventors: 陈小刚; 邓越; 唐小平; 吴洁; 张建碑; 胡梦琪; 罗桂珏
Original assignee: China Petroleum & Chemical Corp Jianghan Oil Field Branch First Gas Collecting Factory; China Petroleum and Chemical Corp
Current assignee: China Petroleum & Chemical Corp Jianghan Oil Field Branch First Gas Collecting Factory; China Petroleum and Chemical Corp
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-07-12
Anticipated expiration: 2031-12-13

Abstract

The utility model relates to the technical field of well sealing of abandoned wells, in particular to a well sealing device. The oil pipe sealing device comprises a crane, an oil pipe and a sealing leather cup, wherein the sealing leather cup is positioned at the lower end of the oil pipe, and the upper end of the oil pipe is detachably connected with a lifting hook of the crane. The well sealing device can reduce well sealing cost and floor area.

Description

Well sealing device

Technical Field

The utility model relates to the technical field of abandoned well sealing, in particular to a well sealing device.

Background

In order to avoid safety accidents such as blowout, falling and the like, well sealing treatment is needed for waste wells generated after petroleum, natural gas and the like are produced. At present, equipment such as a plugging device, a blowout preventer and the like is usually installed in a waste well to realize the plugging and blowout prevention of the waste well, but the weight of the plugging device and the blowout preventer is large, the weight and the size of the used plugging device and the blowout preventer are increased along with the increase of the depth of the waste well, and the plugging device and the blowout preventer cannot be moved into the waste well only by manpower.

At present, a drifting machine, an 18m derrick and accessory equipment thereof are generally adopted, a vehicle-mounted diesel engine is adopted as power during well sealing, a winch roller, a set of crown block and a traveling system which are installed on the derrick are driven after the speed is reduced by a gearbox, a transfer case and a forward and reverse gear box, and finally the plugging device and the blowout preventer are hoisted through an oil pipe. The equipment has complex structure and more systems, which causes extremely high cost of well sealing. In addition, taking a drifting machine as an example, the simplest drifting machine at present also needs a well site area of 60m × 30m, occupies a large area, is complex to operate, has many control points, is complex to maintain, has high technical requirements and is limited to ground construction conditions, and has poor adaptability and economy for well sealing construction operation of a shallow well with the well depth of less than or equal to 1000 m.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a well sealing device to reduce well sealing cost and reduce occupied area.

In order to achieve the purpose, the utility model adopts the following technical scheme: the well sealing device comprises a crane, an oil pipe and a sealing leather cup, wherein the sealing leather cup is positioned at the lower end of the oil pipe, and the upper end of the oil pipe is detachably connected with a lifting hook of the crane.

The beneficial effect of this scheme does:

1. the well sealing device in the scheme is used for sealing a shallow well with the well depth less than or equal to 1000m, and the hoist in the scheme replaces a well dredger and is different from the well dredger and provided with a power structure and a lifting structure, so that structures such as a vehicle-mounted diesel engine, a gearbox, a transfer case, a winch roller and a crown block in the well dredger can be reduced, the number of related equipment, systems and the like is effectively reduced, the cost of the hoist is lower, and the hoist is easier to install, operate and maintain, and the construction cost is greatly reduced. And the connection mode of the oil pipe and the blowout preventer is still the same as that of the prior art, so that the hoisting operation is not changed greatly, and the operation is simple.

2. Different from a tractor hoist, the whole floor area in the scheme is controlled and reduced from 60m multiplied by 30m to 10m multiplied by 10m, the coordination difficulty of workers and farmers is effectively reduced, the ground engineering quantity of land acquisition and the like is reduced, and the economical efficiency is further improved.

3. The sealing leather cup is additionally arranged in the scheme, when a well is sealed, the sealing leather cup is installed on the blowout preventer, the blowout preventing effect can be further improved by the sealing leather cup, the well control safety is guaranteed, and the adaptability is further improved.

Further, the upper end of the oil pipe is provided with a connector.

The beneficial effect of this scheme does: the connector can avoid oil, natural gas etc. to leak from oil pipe when installing preventer and plugging device through oil pipe.

Furthermore, a hanging ring is fixed at the top of the connector.

The beneficial effect of this scheme does: the connector can be directly connected with a lifting hook on a crane through the lifting ring, so that the crane can hoist the blowout preventer and the plugging device through the oil pipe more simply.

Further, the connector and the oil pipe can be in threaded connection.

The beneficial effect of this scheme does: the connector in this scheme is more simple with oil pipe's connection.

Furthermore, a groove with a downward opening is arranged in the connector, and the side wall of the groove is sleeved at the upper end of the oil pipe.

The beneficial effect of this scheme does: the connector in this scheme and oil pipe's outer wall connection can not cause the hindrance to oil pipe's shutoff.

Furthermore, the upper end of the oil pipe is slidably connected with a positioning cylinder, the positioning cylinder can rotate relative to the oil pipe, and the positioning cylinder is in threaded connection with the connector; the upper end cover of oil pipe is equipped with the holding ring, and the external diameter of holding ring is less than the internal diameter of a location section of thick bamboo.

The beneficial effect of this scheme does: after the connector is connected with the oil pipe, the connector is connected with a hook of a crane, so that the connecting position of the connector and the oil pipe needs to bear the weight of the plugging device and the blowout preventer during hoisting.

In this scheme, a location section of thick bamboo can be connected with the connector, and a location section of thick bamboo can bear gravity with the hookup location of connector this moment, can reduce the effort that connector and oil pipe's hookup location received, avoids connector and oil pipe's hookup location to receive the damage and leads to plugging device and preventer to drop, improves the security of hoist and mount and installation.

Drawings

FIG. 1 is a front view of embodiment 1 of the present invention;

fig. 2 is a perspective view of a connector in embodiment 2 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the blowout preventer comprises a blowout preventer 1, a sealing leather cup 2, an oil pipe 3, a positioning ring 31, a connector 4, a lifting ring 41, a groove 42, a crane 5 and a positioning barrel 6.

Example 1

The well sealing device, as shown in fig. 1, includes a crane 5, an oil pipe 3 and a sealing cup 2, and the crane 5 in this embodiment may be an existing crane 5 with a hook. The sealing leather cup 2 is arranged on the blowout preventer 1, and the blowout preventer 1 is sealed again, so that the blowout prevention effect is improved. The 3 ends of oil pipe are connected with preventer 1, and is specific, and the structure of sealing leather cup 2, preventer 1 and oil pipe 3 in this embodiment all is the same with prior art, and the mounting means of sealing leather cup 2 and the connected mode of oil pipe 3 and preventer 1 all are the same with current mounting means, and no longer repeated in this embodiment.

The upper end of oil pipe 3 is equipped with connector 4, and the welding of the top of connector 4 has rings 41, and the bottom of connector 4 is equipped with opening recess 42 down, and the recess 42 lateral wall is equipped with the screw thread, and the upper end of oil pipe 3 is located recess 42 and with connector 4 threaded connection.

The specific implementation process is as follows:

during hoisting, the upper end of the oil pipe 3 is sealed, and specifically, the sealing mode in the embodiment is the same as the sealing direction of the existing oil pipe 3. Then, a lifting hook of the crane 5 is connected with the lifting ring 41, the crane 5 is used as hoisting equipment to hoist the blowout preventer 1 through the oil pipe 3, so that a well dredger is not needed, the occupied area is reduced from 60m multiplied by 30m to 10m multiplied by 10m, and the area of the occupied area is effectively reduced.

Example 2

On the basis of embodiment 1, as shown in fig. 2, a positioning ring 31 is welded at the upper end of the oil pipe 3 in this embodiment, the positioning ring 31 is located below the connector 4, a positioning cylinder 6 is sleeved on the oil pipe 3, the longitudinal section of the positioning cylinder 6 is U-shaped, and a gap is provided between the bottom of the positioning cylinder 6 and the oil pipe 3, so that the positioning cylinder 6 can slide along the axial direction of the oil pipe 3 and can rotate relative to the oil pipe 3. The external diameter of holding ring 31 is less than the internal diameter of a location section of thick bamboo 6, the last pot head of a location section of thick bamboo 6 establish on connector 4 and with the outer wall threaded connection of connector 4, and holding ring 31 offsets with the bottom of a location section of thick bamboo 6 this moment, this embodiment is connected with connector 4 once more through a location section of thick bamboo 6, fix a position a location section of thick bamboo 6 through holding ring 31, make the hookup location of a location section of thick bamboo 6 and connector 4 can bear the gravity of preventer 1, thereby reduce the effort that connector 4 and oil pipe 3's hookup location received, thereby avoid oil pipe 3 to drop from connector 4, improve the security of hoist and mount.

After the hoisting is finished, the connector 4 is taken down from the lifting hook of the crane 5, then the positioning cylinder 6 is rotated to separate the positioning cylinder 6 from the connector 4, and finally the connector 4 can be taken down by rotating the connector 4. Otherwise, the other operations in this embodiment are the same as those in embodiment 1, and are not described again in this embodiment.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Well shut-in device, its characterized in that: the oil pipe sealing device comprises a crane, an oil pipe and a sealing leather cup, wherein the sealing leather cup is positioned at the lower end of the oil pipe, and the upper end of the oil pipe is detachably connected with a lifting hook of the crane.

2. A well shut-in device as defined in claim 1, wherein: the upper end of the oil pipe is provided with a connector.

3. A well-sealing device according to claim 2, wherein: the top of the connector is fixed with a hanging ring.

4. A well-sealing device according to claim 3, wherein: the connector can be in threaded connection with the oil pipe.

5. A well-sealing device according to claim 4, wherein: a groove with a downward opening is arranged in the connector, and the side wall of the groove is sleeved at the upper end of the oil pipe.

6. A well-sealing device according to claim 5, wherein: the upper end of the oil pipe is slidably connected with a positioning cylinder, the positioning cylinder can rotate relative to the oil pipe, and the positioning cylinder is in threaded connection with the connector; the upper end cover of oil pipe is equipped with the holding ring, the external diameter of holding ring is less than the internal diameter of a location section of thick bamboo.