CN220667513U

CN220667513U - Novel floating shoe structure

Info

Publication number: CN220667513U
Application number: CN202321680528.9U
Authority: CN
Inventors: 万程畅; 邵阳
Original assignee: Tianjin Wante Energy Technology Co ltd
Current assignee: Tianjin Wante Energy Technology Co ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2024-03-26
Anticipated expiration: 2033-06-29

Abstract

The utility model belongs to the technical field of oil-gas field well cementation, and discloses a novel floating shoe structure, which comprises a connecting sleeve and a round head guide shoe, wherein a valve body structure is arranged in the connecting sleeve, the valve body structure comprises a sealing seat and a ball head connecting seat, a guide cylinder is arranged on the ball head connecting seat, a ball head connecting rod is fixedly connected to one end of the sealing ball head, which faces the round head guide shoe, through threads, the other end of the ball head connecting rod is inserted into an inner hole of the guide cylinder, a spiral spring is sleeved at the outer end of the guide cylinder and is arranged between the guide cylinder and the sealing ball head, and one end of the sealing ball head, which is far away from the round head guide shoe, is provided with a spherical surface; the floating shoe structure achieves the purpose of guiding through the additionally arranged guide cylinder, and the length of the guide cylinder enables the floating shoe to be stably kept sealed in the repeated opening and closing process.

Description

Novel floating shoe structure

Technical Field

The utility model belongs to the technical field of oil-gas field well cementation, and particularly relates to a novel floating shoe structure.

Background

With the continuous development of oil and gas field exploitation technology, horizontal well drilling and completion are more and more. In a fracturing and completion integrated tubular column or a well cementation fracturing integrated tubular column developed in a horizontal well, a one-way valve float shoe is usually arranged at the bottom of the tubular column.

The floating shoes are internally provided with a one-way valve structure which allows fluid to flow up and down, but not allows fluid to flow down and up, so that high-pressure fluid at the bottom of a well of a construction pipe column does not return up in the process of descending, the pipe column is always in a safe state, and the length of a horizontal well is longer and longer, so that mud is pumped into the pipe column from top to bottom at intervals when the pipe column is in a descending process, and the whole pipe column is propped up, so that circulation can be normally established. When the floating shoes are in the open state, the floating shoes automatically recover to the sealing state after the floating shoes are in the open state.

Conventional floating shoes often leak after a few "shots" and cannot be sealed in reverse, which can lead to well control hazards. The utility model designs a pair of floating shoes with a guiding function, solves the field problem and improves the safety of construction well control.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model relates to a novel floating shoe structure, which comprises a connecting jacket and a round head guide shoe, wherein a valve body structure is arranged in the connecting jacket, the valve body structure comprises a sealing seat, a ball head connecting seat and a sealing ball head, a guide cylinder is arranged on the ball head connecting seat, a ball head connecting rod is fixedly connected to one end of the sealing ball head, which faces the round head guide shoe, through threads, the other end of the ball head connecting rod is inserted into an inner hole of the guide cylinder, a spiral spring is sleeved at the outer end of the guide cylinder and is arranged between the guide cylinder and the sealing ball head, and a spherical surface is arranged at one end, far away from the round head guide shoe, of the sealing ball head.

As a preferable technical scheme of the utility model, a plurality of diversion holes are formed on the connecting sleeve and the round head guide shoe.

As a preferable technical scheme of the utility model, the outer end surface of the connecting sleeve is integrally formed with a raised hard alloy screw.

As a preferable technical scheme of the utility model, the sealing seat is provided with a channel.

As a preferable technical scheme of the utility model, an O-shaped sealing ring is arranged between the sealing seat and the connecting sleeve for sealing.

The beneficial effects achieved by the utility model are as follows:

because the length of the guide cylinder is long enough and is in clearance fit with the ball head connecting rod, the guide cylinder has good guide effect, so that the spherical surface of the sealing ball head can form good seal with the inner wall of the sealing seat, leakage can not occur after repeated jacking operation, the floating shoes can be stably kept sealed in the repeated opening and closing process through the lengthened guide mechanism, well control danger caused by sealing loss can be avoided, and the construction well control safety degree is improved.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of a new floating shoe structure of the present utility model in a lowered condition;

FIG. 2 is a schematic diagram of a new floating shoe construction in a top-on condition of the present utility model.

In the figure: 1. the connecting sleeve; 2. a sealing seat; 3. a channel; 4. a spherical surface; 5. sealing the ball head; 6. a ball head connecting rod; 7. a ball head connecting seat; 8. an O-shaped sealing ring; 9. guiding shoes by using round heads; 10. a guide cylinder; 11. a coil spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: the novel floating shoe structure comprises a connecting sleeve 1 and a round head guide shoe 9, wherein the connecting sleeve 1 and the round head guide shoe 9 are fixedly connected through threads, a valve body structure is arranged in the connecting sleeve 1, the valve body structure comprises a sealing seat 2, a ball head connecting seat 7 and a sealing ball head 5, the sealing seat 2 and the ball head connecting seat 7 are fixedly connected through threads, the sealing seat 2 is in threaded connection with the connecting sleeve 1, a guide cylinder 10 is arranged on the ball head connecting seat 7, one end, facing the round head guide shoe 9, of the sealing ball head 5 is fixedly connected with a ball head connecting rod 6 through threads, the other end of the ball head connecting rod 6 is inserted into an inner hole of the guide cylinder 10, a spiral spring 11 is sleeved at the outer end of the guide cylinder 10 and is arranged between the guide cylinder 10 and the sealing ball head 5, and a spherical surface 4 is arranged at one end, far away from the round head guide shoe 9, of the sealing ball head 5;

as shown in fig. 1, when the well is being run, the sealing ball 5 and the sealing seat 2 form a seal at the spherical surface 4 by the elastic force of the coil spring 11. At this time, if high-pressure fluid exists at the bottom of the well, the seal can prevent the high-pressure fluid from passing through the valve body to reach the well head;

as shown in fig. 2, in the "top-through" state, the mud moves along the arrow shown in the figure, pushing the sealing ball head 5 open and flowing into the bottom of the well, and establishing a circulation; after the "top-on" is finished, the spherical surface 4 forms a seal with the seal seat 2 again under the action of the coil spring 11. The guide cylinder 10 is long enough and is in clearance fit with the ball head connecting rod 6, so that the guide cylinder has good guide effect, the spherical surface 4 of the sealing ball head 5 can form good seal with the sealing seat 2, and the sealing ball head can not leak after a plurality of 'jacking' operations;

a plurality of diversion holes are formed on the connecting sleeve 1 and the round head shoes 9, wherein the diversion holes are used for diversion of fluid; the outer end surface of the connecting sleeve 1 is integrally formed with a raised hard alloy spiral, wherein the naked stratum is scraped during well descending, so that well descending is facilitated; the sealing seat 2 is provided with a channel 3 for fluid to flow in a top-through way; an O-shaped sealing ring 8 is arranged between the sealing seat 2 and the connecting sleeve 1 for sealing, wherein the sealing capacity is improved through the O-shaped sealing ring 8.

In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel floating shoe structure, includes connecting overcoat (1) and button head guide shoes (9), its characterized in that: be equipped with valve body structure in connecting overcoat (1), valve body structure includes seal receptacle (2), bulb connecting seat (7) and sealed bulb (5), be provided with guide cylinder (10) on bulb connecting seat (7), sealed bulb (5) are connected with bulb connecting rod (6) through screw thread fastening towards button head guide shoe (9) one end, bulb connecting rod (6) other end cartridge is in the hole of guide cylinder (10), guide cylinder (10) outer pot head is equipped with coil spring (11) and locates between guide cylinder (10) and sealed bulb (5), sphere (4) have been seted up to sealed bulb (5) one end of keeping away from button head guide shoe (9).

2. A new float shoe construction according to claim 1, wherein: a plurality of diversion holes are arranged on the connecting coat (1) and the round head shoes (9).

3. A new float shoe construction according to claim 1, wherein: the outer end face of the connecting jacket (1) is integrally formed with a raised hard alloy screw.

4. A new float shoe construction according to claim 1, wherein: the sealing seat (2) is provided with a channel (3).

5. A new float shoe construction according to claim 1, wherein: an O-shaped sealing ring (8) is arranged between the sealing seat (2) and the connecting sleeve (1) for sealing.