CN215332754U

CN215332754U - Thermal recovery wellhead device with blowout preventer and seal box dual protection

Info

Publication number: CN215332754U
Application number: CN202121605643.0U
Authority: CN
Inventors: 袁中华; 袁鑫; 邓洪彬; 秦永爽; 顾玮
Original assignee: Yancheng Xiongwei Petrochemical General Machinery Equipment Co ltd
Current assignee: Yancheng Xiongwei Petrochemical General Machinery Equipment Co ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-12-28
Anticipated expiration: 2031-07-14

Abstract

The utility model belongs to the field of oilfield exploitation equipment, and particularly relates to a thermal recovery wellhead device with dual protection of a blowout preventer and a sealing box, which comprises an oil pipe cross joint, wherein the oil pipe cross joint is arranged above a lower flange, a double male pipe nipple is arranged inside the oil pipe cross joint, threaded flanges are arranged on two sides of the oil pipe cross joint, one end of each threaded flange is provided with a first flat gate valve, an upper flange is connected above the oil pipe cross joint, and a small cross joint is arranged above the upper flange. The safety of the equipment is ensured, and the dual protection of the wellhead device is realized.

Description

Thermal recovery wellhead device with blowout preventer and seal box dual protection

Technical Field

The utility model relates to the field of oilfield exploitation equipment, in particular to a thermal recovery wellhead device with dual protection of a blowout preventer and a seal box.

Background

With the rapid development of national economy in China. The increase of the crude oil of needs is multiplied for the device of control steam pipeline is more and more, and the more and more viscous crude oil field is developed and constructed simultaneously, because viscous crude density is big and harden, need inject high temperature high pressure steam and dissolve viscous crude, and the corrosive substance content such as sulphide in the crude oil is high simultaneously. The equipment at the wellhead plays a key role. High-temperature and high-pressure steam is injected through the device to melt the thick oil. The high-temperature high-pressure wellhead device is specially designed and manufactured aiming at the working condition of heavy oil thermal recovery and high-temperature high-pressure steam and oil transportation and production pipelines.

The prior art has the following problems:

the existing wellhead device has poor sealing performance between the sucker rod and the inlet device, oil is easy to splash when in use, crude oil is wasted, environment pollution is convenient to cause, and the device cannot be cut off in time when high-temperature high-pressure steam is injected into the device and oil field blowout is caused, equipment is easy to damage, the cost is increased, and the use requirements of people cannot be met well,

SUMMERY OF THE UTILITY MODEL

Objects of the utility model

In order to solve the technical problems in the background art, the utility model provides a thermal recovery wellhead device with dual protection of a blowout preventer and a seal box, which has the characteristics of carrying out dual protection on the wellhead device, namely carrying out sealing protection on a sucker rod, timely cutting off steam, protecting other equipment in the wellhead device and preventing the wellhead device from being damaged easily.

(II) technical scheme

In order to solve the technical problem, the utility model provides a thermal production wellhead device with dual protection of a blowout preventer and a sealing box, which comprises an oil pipe cross joint, wherein the oil pipe cross joint is arranged above a lower flange, a double male pipe nipple is arranged inside the oil pipe cross joint, threaded flanges are arranged on two sides of the oil pipe cross joint, one end of each threaded flange is provided with a first flat gate valve, an upper flange is connected above the oil pipe cross joint, a small cross joint is arranged above the upper flange, one end of the small cross joint is provided with a second flat gate valve, one side of the second flat gate valve is provided with a restrictor assembly, the small cross joint is connected above a blowout preventer, the sealing box is arranged above the blowout preventer, and particles adsorbing oil liquid are filled inside the sealing box.

Preferably, the four-way joint and the flange and the four-way joint and the blowout preventer are connected through bolts and nuts.

Preferably, a sealing structure is arranged between the first flat gate valve and the pipeline, the sealing structure is made of novel flexible graphite, and the pipeline is provided with a plurality of grooves.

Preferably, one side of the double male short section is provided with a threaded coupling.

Preferably, a sealing gasket and a metal ring gasket are further arranged between the oil pipe four-way joint and the upper flange.

Preferably, the axes of the blowout preventer, the small cross joint, the upper flange, the oil pipe cross joint and the lower flange are all on the same straight line.

The technical scheme of the utility model has the following beneficial technical effects: can adsorb the fluid that splashes through the inside granule of seal box, can seal the protection to the sucker rod on the one hand, on the other hand can prevent that fluid from splashing, avoids causing the pollution of environment, realizes the first layer protection of wellhead assembly, and through setting up preventer structure, preventer guarantees the production safety at the thermal recovery in-process simultaneously, can cut off in the time of can being urgent when the blowout appears, guarantees equipment safety, realizes the duplicate protection to wellhead assembly.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic illustration of a partial explosion configuration of the present invention;

fig. 3 is a partial sectional structural view of the present invention.

Reference numerals:

1. a lower flange; 2. the oil pipe is four-way; 3. a double male short section; 4. a threaded flange; 5. a first flat gate valve; 6. an upper flange; 7. a small cross; 8. a second flat gate valve; 9. a restrictor assembly; 10. a blowout preventer; 11. a sealing box; 12. a bolt; 13. a nut; 14. a threaded collar; 15. a gasket; 16. and a metal ring pad.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1 and 3, an oil pipe cross 2 is arranged above the lower flange 1, a double male short section 3 is arranged inside the oil pipe cross 2, and a threaded coupling 14 is arranged on one side of the double male short section 3.

The utility model has the advantages of specific, two public nipple joint 3 are connected through thread coupling 14, and the broken end of thread coupling 14 is connected with two public nipple joint 3 with same pitch thread mode with same screw thread, has the characteristics of buffering single awl threaded connection two public nipple joint 3 external screw thread root stress concentration, and difficult production is tired out the fracture, and the connection effect is good, can effectually prevent the occurence of failure that two public nipple joint 3 drop.

As shown in fig. 1, threaded flanges 4 are arranged on two sides of the oil pipe cross 2, and a first flat gate valve 5 is arranged at one end of each threaded flange 4.

Specifically, through the regulation to first flat gate valve 5, can close or open the flange screw 4 of 2 both sides of oil pipe cross, convenient to use person controls high temperature high pressure steam, and the junction is provided with seal structure between 5 surplus pipelines of first flat gate valve, seal structure adopts novel flexible graphite particular structure, can guarantee the sealed effect of junction on the one hand, can not cause gaseous revealing easily when using, on the other hand can reduce the wearing and tearing between 5 and the pipeline of first flat gate valve, increase its life.

As shown in fig. 1 and 2, an upper flange is connected above the oil pipe four-way 2, a small four-way 7 is arranged above the upper flange 6, a second flat gate valve 8 is arranged at one end of the small four-way 7, and a restrictor assembly 9 is arranged at one side of the second flat gate valve 8.

Specifically, the setting of flow controller assembly 9 can be controlled the volume of producing oil, and the user adjusts according to the condition of producing oil, and it is comparatively convenient to operate.

Specifically, all connect through bolt 12 and nut 13 between cross and the flange and between cross and the preventer 10 for can dismantle between each spare part, the person of facilitating the use maintains and changes the pipeline of inside, go up still to be provided with sealed 15 and metal ring pad 16 between flange 6 and the oil pipe cross 2 simultaneously, sealed 15 and metal ring pad 16 can make the oil pipe cross 2 and go up being connected between the flange 6 inseparabler through the elastic deformation of self, make its leakproofness more outstanding.

As shown in fig. 1, a blowout preventer 10 is arranged above the small four-way valve 7, a seal box 11 is arranged above the blowout preventer 10, and particles capable of adsorbing oil are filled in the seal box 11.

Specifically, preventer 10 can be when the device can be timely when the blowout appears carry out timely cutting off to high temperature high pressure steam, can guarantee the safety of equipment, carry out the first layer protection to the wellhead assembly, and the granule of the inside packing of seal box 11 can adsorb the fluid that produces in the sucker rod (not drawing in the picture) use, avoid during fluid splashes external environment, avoid the pollution of environment on the one hand, on the other hand has avoided the waste of crude oil, realize the duplicate protection to the wellhead assembly.

As shown in FIG. 1, the axes of the blowout preventer 10, the small cross 7, the upper flange 6, the oil pipe cross 2 and the lower flange 1 are all on the same straight line.

Specifically, the device is located on the same axis, so that flow resistance of high-temperature and high-pressure gas in the device can be avoided, the device is smooth when the gas is diffused in the device, and thick oil on a pipeline can be melted conveniently.

The working principle and the using process of the utility model are as follows: when using, open first plate valve 5 on the device, to the inside high temperature high pressure steam that injects of pipeline, high temperature high pressure steam heats the inside of device, melt the viscous crude as far as possible, be convenient for to the collection of viscous crude, secondly open second plate valve 8, the user is through adjusting throttle assembly 9, flow control, crude oil passes through throttle assembly 9 and gets into defeated oil pipe line, preventer 10 and seal box 11 can protect holistic device when using, seal box 11 inside packing has the granule of absorption fluid, the granule can adsorb the crude oil that splashes, avoid splashing the pollution that causes the environment in the external world, and if close all valves on the device, can end the injection and the crude oil collection of high temperature high pressure gas.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The thermal recovery wellhead device with the dual protection of the blowout preventer and the sealing box comprises an oil pipe cross (2) and is characterized in that the oil pipe cross (2) is arranged above a lower flange (1), a double male short section (3) is arranged inside the oil pipe cross (2), threaded flanges (4) are arranged on two sides of the oil pipe cross (2), a first flat gate valve (5) is arranged at one end of each threaded flange (4), an upper flange (6) is connected above the oil pipe cross (2), a small cross (7) is arranged above the upper flange (6), a second flat gate valve (8) is arranged at one end of the small cross (7), a restrictor assembly (9) is arranged on one side of the second flat gate valve (8), the blowout preventer (10) is connected above the small cross (7), and the sealing box (11) is arranged above the blowout preventer (10), the inside of the seal box (11) is filled with particles for adsorbing oil.

2. The thermal recovery wellhead assembly with dual blowout preventer and seal box protection according to claim 1, characterized in that the connection between the cross and the flange and between the cross and the blowout preventer (10) are connected by means of bolts (12) and nuts (13).

3. The thermal production wellhead assembly with the dual protection of the blowout preventer and the seal box according to claim 1, characterized in that a seal structure is arranged between the first flat gate valve (5) and the second flat gate valve (8) and the pipeline, and the seal structure is made of novel flexible graphite.

4. Thermal recovery wellhead with blowout preventer and seal box double protection according to claim 1, characterised in that one side of the double nipple (3) is provided with a nipple (14).

5. The thermal recovery wellhead with dual protection of blowout preventers and seal boxes according to claim 1, characterized in that a seal gasket (15) and a metal ring gasket (16) are also arranged between the tubing spool (2) and the upper flange (6).

6. The thermal production wellhead assembly with the dual protection of the blowout preventer and the seal box according to claim 1, characterized in that the blowout preventer (10), the small cross (7), the upper flange (6), the tubing cross (2) and the lower flange (1) all have their axes in the same line.