CN213205628U

CN213205628U - Downhole tubular column differential pressure type blocking tool

Info

Publication number: CN213205628U
Application number: CN202022207350.9U
Authority: CN
Inventors: 成卫海; 尚兴宾; 姜海强; 高朋; 赵磊; 陈冰
Original assignee: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-05-14
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a differential blocking tool of tubular column in pit belongs to petroleum industry's workover appurtenance, including casing and center tube, the casing upper end is connected with the top connection, the lower extreme is connected with the lower clutch, and the mid-mounting has the baffle in the center tube, and both ends fixed mounting baffle respectively about the center tube has all been seted up the circulation on two baffles and has been opened the hole, and two circulation punch combination about baffle symmetric distribution are seted up to the center tube periphery. The utility model plugs the circulation hole by means of the elastic rubber rod, and the sealing effect is better; the utility model discloses when stopping the construction and stopping, the elasticity rubber stick can plug up the circulation hole, and circulation channel closes, and the pressure balance in oil pipe and the cover pipe plays oil pipe operation this moment, and well liquid just can not spill over from the well head, has realized cleaner production, safety in production's purpose to because the well head can keep clean, consequently can improve the operating efficiency, eliminate the incident hidden danger, fine result of use and economic benefits have.

Description

Downhole tubular column differential pressure type blocking tool

Technical Field

The utility model relates to a block up the instrument, specifically be a differential jam instrument of tubular column in pit.

Background

Drilling, flushing, slurry replacing and other constructions are conventional procedures in oil field well repairing operation, and the principle is that high-speed fluid is injected into a well through a pump truck, and bottom sediment and the like are carried out of the ground. Because the oil jacket is unbalanced during the construction, well liquid overflows from the well head in the oil pipe lifting and dropping process, so that the pollution and the mud of the well head are caused, and the safety production is not facilitated. Therefore, a plugging tool suitable for a downhole string needs to be designed, and currently, a plugging tool suitable for a downhole string exists in the market, for example, a downhole string differential pressure type plugging tool with application number being CN201720520673.9, but the application is to plug a circulation hole by means of a sealing sleeve, and the sealing effect is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a differential jam instrument of tubular column in pit to solve the problem that prior art exists.

In order to achieve the above object, the utility model provides a following technical scheme:

a downhole tubular column differential pressure type blocking tool comprises a shell and a central tube, wherein the upper end of the shell is connected with an upper joint, the lower end of the shell is connected with a lower joint, a partition board is arranged in the middle of the central tube, baffles are fixedly arranged at the upper end and the lower end of the central tube respectively, circulation opening holes are formed in the two baffles, two circulation hole groups are formed in the periphery of the central tube and are symmetrically distributed relative to the partition board, each circulation hole group comprises a plurality of circulation holes which are uniformly distributed, two connecting block groups are arranged in the shell, each connecting block group comprises a plurality of connecting blocks which are uniformly distributed, the connecting blocks correspond to the circulation holes one to one, grooves are formed in the inner sides of the connecting blocks, elastic rubber rods are arranged in the grooves, the outer ends of the elastic rubber rods are connected with one ends of first springs, the other ends of the first springs are connected with the corresponding grooves, the baffle is connected with the opposite side of the connecting block through a second spring.

According to the downhole string differential pressure type plugging tool, the outer diameter of the baffle is smaller than the inner diameter of the shell by 3-8 mm, so that the central pipe can freely slide.

The downhole string differential pressure plugging tool is characterized in that the upper connector and the shell are connected through threads.

In a differential plugging tool for a downhole string as described above, the lower connector is also threadably connected to the housing.

A differential jam instrument of tubular column in pit, the second spring about both ends respectively fixed connection T type inserted block, equal fixed mounting has T type slot on baffle and the connecting block, the equal opening in T type slot both sides, T type slot and T type inserted block one-to-one, and T type slot can insert the T type inserted block that corresponds to can be convenient for dismantle or install the second spring.

According to the downhole tubular column differential pressure type plugging tool, the surfaces of the first spring and the second spring are respectively provided with the galvanized layer, so that the service lives of the first spring and the second spring can be prolonged.

The utility model has the advantages that: the utility model discloses when stopping the construction and stopping, the elasticity rubber stick can plug up the circulation hole, and circulation channel closes, and the pressure balance in oil pipe and the cover pipe plays oil pipe operation this moment, and well liquid just can not spill over from the well head, has realized cleaner production, safety in production's purpose to because the well head can keep clean, consequently can improve the operating efficiency, eliminate the incident hidden danger, fine result of use and economic benefits have.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of the present invention; fig. 2 is an enlarged view of a portion I of fig. 1.

Reference numerals: 1. a housing; 2. a central tube; 3. an upper joint; 4. a lower joint; 5. a partition plate; 6. a baffle plate; 7. circularly opening the holes; 8. a circulation hole; 9. connecting blocks; 10. a groove; 11. an elastic rubber rod; 12. a first spring; 13. a second spring; 14. a T-shaped insert block; 15. t-shaped slot.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-2, a downhole tubular column differential pressure type plugging tool comprises a casing 1 and a central tube 2, wherein the upper end of the casing 1 is connected with an upper joint 3, the lower end of the casing 1 is connected with a lower joint 4, a partition 5 is installed in the central tube 2, baffles 6 are respectively and fixedly installed at the upper end and the lower end of the central tube 2, circulating opening holes 7 are respectively formed in the two baffles 6, two circulating hole groups are formed in the periphery of the central tube 2 and symmetrically distributed about the partition 5, each circulating hole group comprises a plurality of uniformly distributed circulating holes 8, two connecting block groups are installed in the casing 1, each connecting block group comprises a plurality of uniformly distributed connecting blocks 9, the connecting blocks 9 correspond to the circulating holes 8 one by one, grooves 10 are formed in the inner sides of the connecting blocks 9, elastic rubber rods 11 are arranged in the grooves 10, the outer ends of the elastic rubber rods 11 are connected with one, the inner end of the elastic rubber rod 11 is of an arc structure, the inner end of the elastic rubber rod 11 can be inserted into the corresponding circulation hole 8, the corresponding circulation hole 8 can be blocked by the elastic rubber rod 11, and the baffle 6 and the opposite side of the connecting block 9 are connected through a second spring 13. When the device is used, the device is connected to the middle of a downhole construction tubular column, during positive circulation construction, hydraulic pressure acts on the partition plate 5, the second spring 13 at the upper part is compressed, the central pipe 2 moves downwards, the circulation holes 8 move downwards along with the central pipe 2, the elastic rubber rods 11 are gradually pushed into the corresponding grooves 10 in the process of moving downwards of the central pipe 2, the first springs 12 are in a compressed state at the moment, the inner ends of the elastic rubber rods 11 move out of the corresponding circulation holes 8, the elastic rubber rods 11 do not block the corresponding circulation holes 8, the circulation channel is opened, and workover fluid enters the circulation channel from the circulation opening holes 7; when the construction is stopped, under the action of the second spring 13, the central tube 2 moves upwards, the circulating holes 8 move upwards along with the central tube 2, when the circulating holes 8 move to be positioned on the same central line with the corresponding elastic rubber rods 11, under the action of the elastic force of the corresponding first springs 12, the elastic rubber rods 11 move out of the corresponding grooves 10 and are inserted into the corresponding circulating holes 8, the corresponding circulating holes 8 are blocked by the elastic rubber rods 11, and the circulating channel is closed; during reverse circulation construction, hydraulic pressure acts on the partition plate 5, the second spring 13 at the lower part is compressed, the central pipe 2 moves upwards, the circulation hole 8 moves upwards along with the central pipe 2, the elastic rubber rod 11 is gradually pushed into the corresponding groove 10 in the process that the central pipe 2 moves upwards, the first spring 12 is in a compressed state at the moment, the inner end of the elastic rubber rod 11 moves out of the corresponding circulation hole 8, the elastic rubber rod 11 does not block the corresponding circulation hole 8 any more, and a circulation channel is opened; when the construction is stopped, under the action of the second spring 13, the central tube 2 moves downwards, the circulating holes 8 move downwards along with the central tube 2, when the circulating holes 8 move to be positioned on the same central line with the corresponding elastic rubber rods 11, under the action of the elastic force of the corresponding first springs 12, the elastic rubber rods 11 move out of the corresponding grooves 10 and are inserted into the corresponding circulating holes 8, the corresponding circulating holes 8 are blocked by the elastic rubber rods 11, and the circulating channel is closed; the utility model plugs the circulation hole 8 by means of the elastic rubber rod 11, and the sealing effect is better; the utility model discloses when stopping the construction and stopping, elasticity rubber stick 11 can plug up circulation hole 8, and circulation channel closes, and the pressure balance in oil pipe and the cover pipe plays oil pipe operation this moment, and well liquid just can not spill over from the well head, has realized cleaner production, safety in production's purpose to because the well head can keep clean, consequently can improve the operating efficiency, eliminate the incident hidden danger, fine result of use and economic benefits have.

Specifically, the outer diameter of the baffle 6 described in this embodiment is smaller than the inner diameter of the housing 1 by 3mm to 8mm, and the center tube 2 can be made to slide freely.

Specifically, the upper joint 3 and the housing 1 are screwed together in the embodiment.

Further, the lower joint 4 and the housing 1 are also screwed together in the present embodiment.

Furthermore, in this embodiment, the second spring 13 is fixedly connected to the T-shaped insertion block 14 at the upper end and the lower end, the baffle 6 and the connection block 9 are fixedly connected to the T-shaped insertion block 15, the two sides of the T-shaped insertion block 15 are open, the T-shaped insertion block 15 corresponds to the T-shaped insertion block 14 one by one, and the T-shaped insertion block 15 can be inserted into the corresponding T-shaped insertion block 14, so that the second spring 13 can be conveniently detached or installed.

Furthermore, the surfaces of the first spring 12 and the second spring 13 are both provided with a zinc coating, so that the service lives of the first spring 12 and the second spring 13 can be prolonged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a differential jam instrument of tubular column in pit which characterized in that: comprises a shell (1) and a central tube (2), wherein the upper end of the shell (1) is connected with an upper joint (3), the lower end of the shell is connected with a lower joint (4), a partition plate (5) is arranged in the middle of the central tube (2), baffles (6) are fixedly arranged at the upper end and the lower end of the central tube (2) respectively, holes (7) are opened in a circulating manner on the two baffles (6), two circulating hole groups are arranged on the periphery of the central tube (2) and symmetrically distributed relative to the partition plate (5), each circulating hole group comprises a plurality of uniformly distributed circulating holes (8), two connecting block groups are arranged in the shell (1), each connecting block group comprises a plurality of uniformly distributed connecting blocks (9), the connecting blocks (9) correspond to the circulating holes (8) one by one, grooves (10) are arranged on the inner side of each connecting block (9), elastic rubber rods (11) are arranged in the grooves (10), the outer ends, the other end of the first spring (12) is connected with the corresponding groove (10), the inner end of the elastic rubber rod (11) is of an arc structure, the inner end of the elastic rubber rod (11) can be inserted into the corresponding circulation hole (8), the elastic rubber rod (11) can plug the corresponding circulation hole (8), and the baffle (6) is connected with the opposite side of the connecting block (9) through the second spring (13).

2. The differential pressure plugging tool of claim 1, wherein: the outer diameter of the baffle (6) is 3 mm-8 mm smaller than the inner diameter of the shell (1), so that the central tube (2) can freely slide.

3. The differential pressure plugging tool of claim 1, wherein: the upper joint (3) and the shell (1) are connected together through threads.

4. The differential pressure plugging tool of claim 1, wherein: the lower joint (4) is connected with the shell (1) through threads.

5. The differential pressure plugging tool of claim 1, wherein: second spring (13) upper and lower both ends respectively fixed connection T type inserted block (14), equal fixed mounting has T type slot (15) on baffle (6) and connecting block (9), the equal opening in T type slot (15) both sides, T type slot (15) and T type inserted block (14) one-to-one, and T type slot (15) can insert corresponding T type inserted block (14).

6. The differential pressure plugging tool of claim 1, wherein: the surfaces of the first spring (12) and the second spring (13) are provided with zinc coatings.