CN219241871U

CN219241871U - Conventional tubular column fracturing wellhead device

Info

Publication number: CN219241871U
Application number: CN202221576760.3U
Authority: CN
Inventors: 曾海江; 黄志明; 张树志; 赵华
Original assignee: Karamay Henghui Petroleum Machinery Manufacturing Co ltd
Current assignee: Karamay Henghui Petroleum Machinery Manufacturing Co ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2023-06-23
Anticipated expiration: 2032-06-23

Abstract

The utility model discloses a conventional pipe column fracturing wellhead device, which comprises a fracturing four-way joint, wherein the top of the fracturing four-way joint is an integral flange device with a sealing gasket ring, a connecting bolt is arranged on a flange and is connected with a fracturing blowout prevention system, the bottom of the fracturing four-way joint is matched with a packing type oil pipe hanger through a sealing ring to form a pressure isolation system for isolating an oil jacket annulus, and two sides of the fracturing four-way joint are connected with a parallel gate valve group through wire planting bolts and nuts to form a fracturing liquid pumping channel during fracturing; the fracturing four-way main body structure is a four-way device, two sides are fracturing liquid pumping channels, a top channel is connected to a fracturing blowout prevention system, the bottom is connected with an original oil extraction device, and an oil sleeve annulus is isolated between the fracturing four-way main body structure and the original oil extraction device through a packing type oil pipe hanger and a pipe column, wherein the device solves the problems of complex current installation and inconvenient operation, and can directly carry out fracturing operation under the configuration of a conventional pipe column and a wellhead.

Description

Conventional tubular column fracturing wellhead device

Technical Field

The utility model belongs to the technical direction of oilfield thin oil exploitation, and particularly relates to a conventional pipe column fracturing wellhead device.

Background

Xinjiang oil fields have been developed and developed for decades, and in the current crude oil yield constitution, thin oil disposal dominates, but as the age of development of the block increases, the production of thin oil wells also declines year by year. In order to improve production efficiency and yield, advanced fracturing operation technology needs to be applied to perform fracturing operation on old wells.

The utility model provides a production wellhead assembly that Xinjiang oilfield thin oil exploitation used is KY65-25B type production wellhead assembly, and this wellhead assembly's highest operating pressure is 25MPa, and the condition that the well head pressure can take place the unusual rise sometimes after the oil recovery well fracturing, former production wellhead assembly pressure grade is lower, can not satisfy the requirement of fracturing operation on the pressure grade, if need carry out fracturing operation to this type well, need at first change this wellhead assembly in order to satisfy the needs of follow-up work, in order to solve a great deal of inconvenience that change well head and tubular column brought on site operation, has put forward a design fracturing wellhead assembly, under the prerequisite of motionless tubular column and wellhead assembly, directly installs fracturing wellhead assembly and carries out fracturing operation.

Disclosure of Invention

The utility model provides a conventional pipe column fracturing wellhead device for meeting the requirement of conventional well fracturing operation of a stationary wellhead and a pipe column, and solves the problems of long construction period, complex construction operation procedures and the like caused by the need of replacing an original wellhead device and the pipe column during fracturing construction.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a conventional tubular column fracturing wellhead assembly, is including the fracturing cross, the fracturing cross top is for having the integral flange device of sealed backing ring, and has connecting bolt and fracturing blowout prevention system to be connected on the flange, the bottom of fracturing cross and seal between the packing type oil pipe hanger form the pressure isolation system of isolated oil jacket annular space through the cooperation of sealing washer, the both sides of fracturing cross are connected with parallel gate valve group through planting silk bolt nut, and fracturing liquid pump pumping passageway when constituteing the fracturing.

The fracturing four-way main body structure is a four-way device, two sides are fracturing liquid pumping channels, a top channel is connected to a fracturing blowout prevention system, the bottom is connected with an original oil extraction device, an oil sleeve annulus is isolated between the fracturing four-way main body structure and the original oil extraction device through a packing type oil pipe hanger and a pipe column, the pressure of high-pressure fracturing liquid can not be transferred to the original oil extraction device during fracturing, and the fracturing construction of the fracturing four-way main body structure is protected from being broken by high-pressure fluid.

Preferably, the sealing ring is arranged on the outer side of the upper part of the packing type oil pipe hanger, a sealing channel is formed between the sealing ring and the fracturing four-way joint, the sealing ring on the outer side of the lower part of the sealing ring forms a seal with the main channel of the original wellhead device, and the inner side of the lower end of the sealing ring is internally threaded and connected to the original wellhead tubular column, so that the purpose of isolating the original wellhead device is achieved.

Preferably, the sealing gasket ring and the connecting bolt at the upper end of the fracturing four-way joint can be quickly connected with the fracturing blowout prevention system, so that the operation time is saved.

Preferably, the parallel gate valve group is connected with a wellhead fracturing device, and fracturing fluid can enter a downhole fracturing target interval through the parallel gate valve group.

Compared with the prior art, the utility model has the following beneficial effects: in the present utility model, the number of the components,

the fracturing well head is mainly composed of a parallel gate valve assembly, a fracturing four-way joint, a sealing gasket ring, a connecting bolt, a sealing ring, a sealing type oil pipe hanger and an original oil extraction well head device, wherein the sealing ring is installed on the sealing type oil pipe hanger in advance, the sealing ring is well connected with an oil pipe and then is sealed in the original oil extraction well head four-way joint, the fracturing well head is installed on the upper portion of the sealing type oil pipe hanger, the fracturing well head four-way joint is sealed with a pipe column oil sleeve annulus, the original well head is not subjected to fracturing pressure when the fracturing operation is implemented, and the high efficiency and the safety of the fracturing operation are guaranteed.

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 the structure of the present utility model;

in the figure: 1. a parallel gate valve assembly; 2. fracturing the four-way joint; 3. a seal grommet; 4. a connecting bolt; 5. a seal ring; 6. a packer tubing hanger; 7. an original oil extraction wellhead device.

Detailed Description

The technical scheme of the present utility model is further described in non-limiting detail below with reference to the preferred embodiments and the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. 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.

Referring to fig. 1, the present utility model provides the following technical solutions: the utility model provides a conventional tubular column fracturing wellhead assembly, including fracturing cross 2, fracturing cross 2 top is for having the integral flange device of sealed backing ring 3, and has connecting bolt 4 to be connected with fracturing blowout prevention system on the flange, forms the pressure isolation system of isolated oil jacket annular space through sealing washer 5 cooperation between the bottom of fracturing cross 2 and the sealed separate type oil pipe hanger 6, and fracturing cross 2's both sides are connected with parallel gate valve subassembly 1 through planting silk bolt nut, and the fracturing liquid pump pumping passageway when constituteing the fracturing.

The main structure of the fracturing four-way 2 is a four-way device, two sides are fracturing liquid pumping channels, a top channel is connected to a fracturing blowout prevention system, the bottom is connected with an original oil extraction device, an oil sleeve annulus is isolated between the fracturing four-way 2 and the original oil extraction device through a packing type oil pipe hanger 6 and a pipe column, the pressure of high-pressure fracturing liquid can not be transferred to the original oil extraction device during fracturing, and the fracturing construction of the fracturing four-way device is protected from being broken by high-pressure fluid.

The sealing ring 5 is arranged on the outer side of the upper part of the packing type oil pipe hanger 6, a sealing channel is formed between the sealing ring 5 and the fracturing four-way valve 2, the sealing ring 5 on the outer side of the lower part forms a seal with the main channel of the original wellhead device, and the inner side of the lower end of the sealing ring is provided with an internal thread connected to the original wellhead tubular column, so that the purpose of isolating the original wellhead device is achieved.

The sealing gasket ring 3 and the connecting bolt 4 at the upper end of the fracturing four-way valve 2 can be quickly connected with the fracturing blowout prevention system, so that the operation time is saved.

The parallel gate valve assembly 1 is connected with a wellhead fracturing device, and fracturing fluid can enter a downhole fracturing target interval through the wellhead fracturing device;

when the device is installed, the original pipe is preferentially plugged, the crude oil pipe hanger is lifted and detached after plugging is completed, the packing type oil pipe hanger 6 is connected to the original pipe column and is connected to the original oil extraction wellhead device 7 in a sealing mode, the fracturing wellhead device and the blowout prevention system are connected, fracturing fluid is fed into the fracturing wellhead gate valve to carry out fracturing operation, and the production is restored after the fracturing operation is completed.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Finally, it should be pointed out that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The utility model provides a conventional tubular column fracturing wellhead assembly, includes parallel gate valve subassembly (1), fracturing cross (2), sealing washer (5), seals up separate oil pipe hanger (6) and former oil recovery wellhead assembly (7), its characterized in that: parallel gate valve subassembly (1) through planting silk bolt and nut with fracturing cross (2) are connected, fracturing cross (2) top is for having integral flange device of sealed backing ring (3), and has connecting bolt (4) to be connected with fracturing blowout prevention system on the flange, forms the pressure isolation system of isolated oil jacket annular space through sealing washer (5) cooperation between the bottom of fracturing cross (2) and sealing-type oil pipe hanger (6), and fracturing cross (2) both sides are connected with parallel gate valve subassembly (1) through planting silk bolt nut, and fracturing liquid pump pumping passageway when constituteing the fracturing.

2. A conventional string fracturing wellhead according to claim 1, wherein: the sealing ring (5) is arranged on the outer side of the upper part of the packing type oil pipe hanger (6), a sealing channel is formed between the sealing ring and the fracturing four-way valve (2), the sealing ring (5) on the outer side of the lower part forms sealing with a main channel of an original wellhead device, and the inner side of the lower end of the sealing ring is provided with an internal thread which is connected to an original wellhead tubular column, so that the purpose of isolating the original wellhead device is achieved.

3. A conventional string fracturing wellhead according to claim 2, wherein: the packing type oil pipe hanger (6) is respectively connected with the fracturing four-way joint (2) and the original oil extraction wellhead device (7), and the sealing ring (5) is positioned between the fracturing four-way joint (2) and the packing type oil pipe hanger (6).

4. A conventional string fracturing wellhead according to claim 1, wherein: when the device is operated, the original oil extraction wellhead device (7) is not subjected to the pressure during operation.