CN217354331U - High-temperature high-pressure continuous oil pipe wellhead protector - Google Patents

Abstract

The utility model relates to a high temperature high pressure coiled tubing well head protector belongs to oil field coiled tubing operation equipment technical field. The technical scheme is as follows: the anti-freezing liquid flow-out device comprises an anti-freezing liquid circulation vertical pipe, a temperature-resistant anti-freezing liquid inlet, an anti-freezing liquid outlet, an upper connecting flange and a connecting flange, wherein the anti-freezing liquid inlet is formed in the lower portion of the temperature-resistant anti-freezing liquid circulation vertical pipe, the anti-freezing liquid outlet is connected with the upper shell through a high-pressure plunger pump unit, the upper connecting flange is connected with the connecting flange of the anti-freezing liquid circulation vertical pipe through a bolt, the anti-freezing liquid flows through a closed cavity formed by the anti-freezing liquid circulation vertical pipe and the high-freezing liquid heat insulation and anti-spraying device, flows out from the anti-freezing liquid outlet of the body, and flows through a cooler and is connected with the inlet of the liquid storage tank. The utility model has the advantages that: form the high temperature and block the layer above the well head, can protect the coiled tubing operation equipment of bench, improve the security of equipment use.

Description

High-temperature high-pressure continuous oil pipe wellhead protector

Technical Field

The utility model relates to a high temperature high pressure coiled tubing well head protector belongs to oil field coiled tubing operation equipment technical field.

Background

Petroleum is an indispensable important resource at the present stage, and the production of petroleum is directly related to the development of various aspects of the country. In the oil exploitation of oil fields, the thick oil has special characteristics of high viscosity and high solidifying point, so the thick oil is difficult to exploit, the thick oil thermal exploitation and the high solidifying point exploitation are generally performed by adopting a thermal exploitation mode at home and abroad, and the steam huff and puff is the thermal exploitation technology mainly applied in China at present.

The steam huff and puff process is that a certain amount of steam is injected into an oil well within a few weeks, after the injection is stopped, the well is closed for a few days to condense the steam, an oil layer is soaked to diffuse heat, then the well is opened for production, the temperature in the well can reach 350 ℃ at most, and the maximum pressure can reach 20 MPa. When coiled tubing logging is performed in the production process, normal construction of equipment can be influenced by high temperature and high pressure in a well, and even safety accidents are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high temperature high pressure coiled tubing well head protector forms the high temperature above the well head and blocks the layer, can protect the bench coiled tubing operation equipment, and the security that improve equipment used reduces the influence of high temperature high pressure to bench equipment life, equipment function, solves the problem that exists among the background art.

The technical scheme of the utility model is that:

a high-temperature and high-pressure coiled tubing wellhead protector comprises a liquid storage tank, a high-pressure plunger pump unit, a blowout prevention circulating vertical pipe, a high-temperature heat-insulation blowout prevention device and a temperature-resistant blowout prevention vertical pipe;

the blowout prevention circulation vertical pipe comprises a union, a body and a first connecting flange, wherein the body is of a hollow cylindrical structure, the inner diameter of the body is matched with the diameter of the continuous oil pipe, the union is arranged at the upper end of the body, the first connecting flange is arranged at the lower end of the body, and an anti-freezing solution outlet is formed in the body;

the high-temperature heat-insulation blowout preventer comprises a support bolt, a lower shell, a packing cylinder sleeve, an upper shell, a rubber core, an anti-extrusion ring, a packing, a hydraulic oil inlet, an antifreeze liquid inlet, an upper connecting flange and a lower connecting flange; the upper shell and the lower shell are of hollow cylindrical structures, the upper shell and the lower shell are connected together through a supporting bolt, the upper shell is provided with an antifreeze solution inlet and an upper connecting flange, and the lower shell is provided with a lower connecting flange; the packing cylinder sleeve is internally provided with a packing and a rubber core, the packing cylinder sleeve is provided with a hydraulic oil inlet, and anti-extrusion rings are arranged at two ends of the rubber core;

the temperature-resistant blowout-preventing vertical pipe is of a double-layer structure consisting of an inner wall and an outer wall, an antifreeze liquid cavity is formed between the inner wall and the outer wall, liquid fins are arranged in the antifreeze liquid cavity, an antifreeze liquid inlet communicated with the antifreeze liquid cavity is formed in the lower part of the temperature-resistant blowout-preventing vertical pipe, an antifreeze liquid outlet communicated with the antifreeze liquid cavity is formed in the upper part of the temperature-resistant blowout-preventing vertical pipe, and two ends of the temperature-resistant blowout-preventing vertical pipe are respectively provided with a second connecting flange;

the anti-freezing liquid flow-out device comprises a blowout-preventing circulating vertical pipe, a high-temperature heat-insulating blowout-preventing device, a high-temperature plunger pump unit, a high-pressure plunger pump unit, a liquid storage tank, a high-temperature heat-insulating blowout-preventing device, a connecting flange, a lower shell, a temperature-resistant blowout-preventing vertical pipe, an anti-freezing liquid inlet, a high-pressure plunger pump unit, a high-temperature circulating riser, a high-temperature plunger pump unit, a high-temperature circulating riser, a high-temperature plunger pump unit, a high-temperature circulating riser, high-temperature plunger pump unit, a high-temperature circulating riser, a high-temperature circulating riser, a high-temperature circulating riser, a high-temperature circulating riser, a high-temperature circulating riser.

The high-pressure plunger pump unit comprises a variable frequency motor and a plunger pump.

And a closed cavity is formed between an upper shell and the packing cylinder sleeve in the high-temperature heat-insulation blowout preventer.

The inner wall and the outer wall of the temperature-resistant blowout-preventing vertical pipe are both of cylindrical structures, and the diameter of the inner wall is matched with that of the coiled tubing.

The utility model has the advantages that: the whole system has compact structure, reasonable layout and convenient operation, and the formed high-temperature blocking layer can protect the operating equipment of the continuous oil pipe on the platform, improve the use safety of the equipment and reduce the influence of high temperature and high pressure on the service life and the function of the equipment on the platform.

Drawings

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

FIG. 2 is a schematic view of a high pressure plunger pump assembly;

FIG. 3 is a schematic view of a chiller;

FIG. 4 is a schematic illustration of a blowout prevention cycle riser; replacing drawings

FIG. 5 is a perspective view of the high temperature thermal insulation blowout preventer;

FIG. 6 is a cross-sectional view of the high temperature thermal insulation blowout preventer;

FIG. 7 is a schematic view of a temperature resistant blowout preventer riser;

FIG. 8 is a cross-sectional view C-C of FIG. 7;

FIG. 9 is a schematic view of a spray apparatus;

FIG. 10 is a schematic view of a fluid reservoir;

in the figure: the device comprises a liquid storage tank 100, an air filter element 101, a liquid return filter 102, a liquid level meter 103, a lifting lug 104, a maintenance port 105, a liquid discharge ball valve 106, a tank body 107 and a mounting plate 108;

the device comprises a high-pressure plunger pump unit 200, a frequency conversion cabinet 201, a frequency conversion motor 202, a plunger pump 203 and a lubricating system 204;

a cooler 300, a motor 301, blades 302, fins 303;

the blowout prevention circulation riser comprises a blowout prevention circulation riser 400, a union 401, a body 402, an internal thread joint 403, a first connecting flange 404 and a temperature sensor 405;

the high-temperature heat-insulation blowout preventer 500 comprises a support bolt 501, a lower shell 502, a packing cylinder sleeve 503, a mounting side door 504, an upper shell 505, a rubber core 506, an anti-extrusion ring 507, a packing 508, a hydraulic oil inlet 509, an antifreeze liquid inlet 510, an upper connecting flange 511 and a lower connecting flange 512;

the temperature-resistant blowout prevention vertical pipe 600 comprises a second connecting flange 601, air cooling fins 602, an inner wall 603, an outer wall 604, liquid fins 605, a joint 606 and a temperature sensor 607;

the spraying device 700 is connected with a spray head 701, a pipe clamp 702, a water collecting tank 703, a sealing gasket 704, a water inlet pipe 705, a water outlet pipe 706 and a waterproof adhesive tape 707.

Detailed Description

The invention will be further described by way of example with reference to the accompanying drawings.

Referring to fig. 1-10, a high-temperature and high-pressure coiled tubing wellhead protector comprises a liquid storage tank 100, a high-pressure plunger pump unit 200, a blowout prevention circulation riser 400, a high-temperature heat insulation blowout preventer 500 and a temperature-resistant blowout prevention riser 600;

the blowout prevention circulation riser 400 comprises a union 401, a body 402 and a first connecting flange 404, wherein the body 402 is of a hollow cylindrical structure, the inner diameter of the body is matched with the diameter of a continuous oil pipe, the union 401 is arranged at the upper end of the body, the first connecting flange 404 is arranged at the lower end of the body 402, an anti-freezing solution inlet is formed in the lower part of the body 402, and an anti-freezing solution outlet is formed in the upper part of the body 402;

the high-temperature heat-insulation blowout preventer 500 comprises a support bolt 501, a lower shell 502, a packing cylinder sleeve 503, an upper shell 505, a rubber core 506, an anti-extrusion ring 507, a packing 508, a hydraulic oil inlet 509, an antifreeze inlet 510, an upper connecting flange 511 and a lower connecting flange 512; the upper shell 505 and the lower shell 502 are hollow cylindrical structures, the upper shell 505 and the lower shell 502 are connected together through a support bolt 501, the upper shell 505 is provided with an antifreeze solution inlet 510 and an upper connecting flange 511, and the lower shell 502 is provided with a lower connecting flange 512; a packing 508 and a rubber core 506 are arranged in the packing cylinder sleeve 503, the packing cylinder sleeve 503 is provided with a hydraulic oil inlet 509, and anti-extrusion rings 507 are arranged at two ends of the rubber core 506;

the temperature-resistant blowout prevention vertical pipe 600 is of a double-layer structure consisting of an inner wall 603 and an outer wall 604, an antifreeze liquid cavity is formed between the inner wall 603 and the outer wall 604, liquid fins 605 are arranged in the antifreeze liquid cavity, an antifreeze liquid inlet communicated with the antifreeze liquid cavity is formed in the lower part of the temperature-resistant blowout prevention vertical pipe 600, an antifreeze liquid outlet communicated with the antifreeze liquid cavity is formed in the upper part of the temperature-resistant blowout prevention vertical pipe 600, and two ends of the temperature-resistant blowout prevention vertical pipe 600 are respectively provided with a second connecting flange 601;

the blowout prevention circulation riser 400 is connected with an upper shell 505 in the high-temperature heat-insulation blowout prevention device 500 through a connecting flange, a lower shell 502 in the high-temperature heat-insulation blowout prevention device 500 is connected with a temperature-resistant blowout prevention riser 600 through a connecting flange, an antifreeze liquid inlet at the lower part of the temperature-resistant blowout prevention riser 600 is connected with an outlet of the liquid storage tank 100 through a high-pressure plunger pump unit 200, an antifreeze liquid outlet at the upper part of the temperature-resistant blowout prevention riser 600 is connected with an antifreeze liquid inlet 510 of the upper shell 505 in the high-temperature heat-insulation blowout prevention device 500, an upper connecting flange 511 of the upper shell 505 is in bolted connection with a connecting flange I404 of the blowout prevention circulation riser 400, antifreeze liquid flows through a closed cavity formed by the blowout prevention circulation riser 400 and the high-temperature heat-insulation blowout prevention device 500, flows out from an antifreeze liquid outlet of the body 402, and flows through the cooler 300 to be connected with an inlet of the liquid storage tank 100.

In this example, the cooling principle is illustrated with reference to the accompanying figures 1-10: the heat source is a well head for heavy oil thermal recovery, in order to prevent heat below the well head from being transferred to the top surface to affect top coiled tubing equipment, the high-pressure plunger pump set 200 is used for driving liquid in the liquid storage tank 100 to circulate in the blowout prevention circulation vertical pipe 400, the blowout preventer 500 and the temperature-resistant blowout prevention vertical pipe 600, heat of the temperature-resistant blowout prevention vertical pipe 600, the blowout preventer 500 and the blowout prevention circulation vertical pipe 400 is taken away by heat exchange, so that the temperature of the temperature-resistant blowout prevention vertical pipe 600, the blowout preventer 500, the blowout prevention circulation vertical pipe 400 and the internal coiled tubing is reduced, the temperature conduction is prevented, anti-freezing liquid flows back to the liquid storage tank 100 through the cooler 300, and the cooler 300 finally returns to the liquid storage tank 100 after heat dissipation of the backflow liquid.

In order to ensure the heat dissipation effect, the spraying device 700 is arranged on the high-temperature heat-insulation blowout preventer 500 to play a role in auxiliary heat dissipation, tap water is sprayed to the rubber core part of the high-temperature heat-insulation blowout preventer 500, heat is taken away by heat exchange, and the function of auxiliary cooling is played. Refer to fig. 1.

Description of the control principle: the plunger pump is driven by a variable frequency motor, the displacement of the plunger pump is adjusted by adjusting the rotating speed of the motor, temperature sensors are arranged on the temperature-resistant blowout prevention vertical pipe 600 and the blowout prevention circulation vertical pipe 400, the temperature of the temperature-resistant blowout prevention vertical pipe 600 and the temperature of the blowout prevention circulation vertical pipe 400 can be displayed on the control cabinet at any time, when the temperature exceeds a limit temperature, the rotating speed of the motor can be adjusted to adjust the flow of the antifreeze to achieve a proper temperature, and the spraying device has an effect of assisting in cooling. Refer to fig. 1.

Referring to fig. 2, a schematic diagram of a high-pressure plunger pump assembly 200 is shown, wherein a frequency conversion cabinet 201 is a rectangular structure, and can receive and display system temperature, and an operator can control the rotation speed of a frequency conversion motor 202 by changing frequency according to the system temperature. The variable frequency motor 202 drives the plunger pump 203 to rotate, the displacement of the plunger pump is adjustable, and the plunger pump has two modes of mechanical control and electric control, wherein the mechanical control is realized by adjusting a flow adjusting valve of the plunger pump, and the electric control is realized by adjusting the rotating speed of the variable frequency motor 202. To extend the service life of the plunger pump 203, a lubrication system 204 is added.

Referring to fig. 3, the cooler 300 is a rectangular structure, and a liquid inlet and a liquid outlet are reserved, and the main function is to cool the flowing antifreeze solution, the motor 301 drives the blade 302 to rotate, the blade 302 rotates to drive the air flow, and the air flow flows through the fins 303 to take away the heat of the liquid in the fins.

Referring to fig. 4, a schematic diagram of a blowout prevention circulation riser 400 is shown, which is a circular pipe structure and is installed at the uppermost end of a high-temperature and high-pressure wellhead protector, and comprises a union 401, a body 402, an internal thread joint 403, a connecting flange 404 and a temperature sensor 405, wherein the union 401 adopts an internal thread sleeve structure and is connected with upper equipment in a matching manner; a body 402, which connects the other parts together by welding process; an internal thread connector 403 arranged on the side surface of the body 402 and used for connecting a water inlet pipe and a water outlet pipe; and a connection flange 404 installed at an end of the body 402 for connecting with the high temperature thermal insulation blowout preventer 500. And the temperature sensor 405 is installed on the connecting flange 404, transmits the detected temperature information to the frequency conversion cabinet 201, and displays the information on a screen.

As shown in fig. 5 and 6, a schematic diagram of a high-temperature heat-insulation blowout preventer 500 includes a support bolt 501, a lower casing 502, a packing sleeve 503, an upper casing 505, a rubber core 506, an anti-extrusion ring 507, a packing 508, a hydraulic oil inlet 509, an antifreeze inlet 510, an upper connecting flange 511, and a lower connecting flange 512, wherein the support bolt 501 is connected with the lower casing 502 and the upper casing 505, hydraulic oil enters a closed cavity formed by the upper casing 505 and the packing sleeve 503 to drive the packing sleeve 503 to move up and down to press the rubber core 506, and the anti-extrusion rings 507 are installed at two ends of the rubber core 506 to protect the rubber core.

Referring to fig. 7 and 8, which are schematic diagrams of a temperature-resistant blowout preventer riser 600, which comprises a connecting flange 601, air fins 602, an inner wall 603, an outer wall 604, liquid fins 605, a joint 606 and a temperature sensor 607, wherein antifreeze liquid flows through the joint 606 to enter a cavity formed by the inner wall 603 and the outer wall 604, and the liquid fins 605 are installed in the cavity to prolong a liquid flowing line and increase the contact area of the liquid and the wall cavity, thereby increasing the heat exchange efficiency. The temperature sensor 607 is installed on the inner wall 603, and transmits the detected temperature information to the frequency conversion cabinet 201, and displays the information on the screen as the basis of the liquid flow regulation.

As shown in fig. 9, a spraying device 700 comprises a nozzle 701, a pipe clamp 702, a water collecting tank 703, a sealing gasket 704, a water inlet pipe 705, a water outlet pipe 706 and a waterproof adhesive tape 707, wherein tap water flows through the water inlet pipe 705 and flows through the nozzle 701 to spray the tap water to the rubber core part of the high-temperature heat-insulation blowout preventer 500 for spraying and cooling, the water collecting tank 703 collects the cooled water and discharges the water through the water outlet pipe 706, the nozzle 701 has a circular structure, water spray holes are uniformly formed on the inner side of the nozzle in an inclined manner, and a water inlet joint is welded on the outer wall of the nozzle and can be connected with the water inlet pipe. The water collecting tank 703 is a structure of two semicircular connections, and adopts bolt connection, the bottom surface is two inclined lapping planes, the water outlet is installed at the lowest point, and avoids water leakage, and the side wall connection part is glued 707 with waterproof adhesive tape at the inner wall to prevent water leakage.

Referring to FIG. 10, a schematic view of a storage tank 100 is shown, which comprises a tank body 107, an air filter element 101, a liquid return filter 102, a maintenance port 105, a liquid discharge ball valve 106, a liquid level meter 103, a lifting lug 104 and a mounting plate 108; the air filter element 101 can exhaust air in liquid and release air pressure; the liquid return filter 102 can filter the liquid in the circulation; the maintenance port 105 is of a circular structure and can be used for cleaning and maintaining the liquid storage tank 100; the liquid discharge ball valve 106 is used for opening and closing a liquid outlet; the liquid level meter 103 can be used for observing the liquid level of the liquid storage tank; the lifting lug 104 can be used for lifting the liquid storage tank; the mounting plate 108 is used for fixing the liquid storage tank.

Claims (4)

1. The utility model provides a high temperature high pressure coiled tubing well head protector which characterized in that: the system comprises a liquid storage tank (100), a high-pressure plunger pump unit (200), a blowout prevention circulating riser (400), a high-temperature heat-insulation blowout prevention device (500) and a temperature-resistant blowout prevention riser (600);

the blowout prevention circulation riser (400) comprises a union (401), a body (402) and a first connecting flange (404), wherein the body (402) is of a hollow cylindrical structure, the inner diameter of the body is matched with the diameter of a coiled tubing, the union (401) is arranged at the upper end of the body, the first connecting flange (404) is arranged at the lower end of the body (402), an anti-freezing solution outlet is formed in the upper part of the body (402), and the first connecting flange (404) is connected with the upper connecting flange (511) through bolts;

the high-temperature heat-insulation blowout preventer (500) comprises a support bolt (501), a lower shell (502), a packing cylinder sleeve (503), an upper shell (505), a rubber core (506), an anti-extrusion ring (507), a packing (508), a hydraulic oil inlet (509), an antifreeze inlet (510), an upper connecting flange (511) and a lower connecting flange (512); the upper shell (505) and the lower shell (502) are of hollow cylindrical structures, the upper shell (505) and the lower shell (502) are connected together through a support bolt (501), the upper shell (505) is provided with an antifreeze liquid inlet (510) and an upper connecting flange (511), and the lower shell (502) is provided with a lower connecting flange (512); a packing (508) and a rubber core (506) are arranged in the packing cylinder sleeve (503), the packing cylinder sleeve (503) is provided with a hydraulic oil inlet (509), and anti-extrusion rings (507) are arranged at two ends of the rubber core (506);

the temperature-resistant blowout-preventing vertical pipe (600) is of a double-layer structure consisting of an inner wall (603) and an outer wall (604), an antifreeze liquid cavity is formed between the inner wall (603) and the outer wall (604), liquid fins (605) are arranged in the antifreeze liquid cavity, an antifreeze liquid inlet communicated with the antifreeze liquid cavity is arranged at the lower part of the temperature-resistant blowout-preventing vertical pipe (600), an antifreeze liquid outlet communicated with the antifreeze liquid cavity is arranged at the upper part of the temperature-resistant blowout-preventing vertical pipe (600), and two ends of the temperature-resistant blowout-preventing vertical pipe (600) are respectively provided with a second connecting flange (601);

the blowout prevention circulation vertical pipe (400) is connected with an upper shell (505) in a high-temperature heat insulation blowout prevention device (500) through a connecting flange, a lower shell (502) in the high-temperature heat insulation blowout prevention device (500) is connected with a temperature-resistant blowout prevention vertical pipe (600) through a connecting flange, an antifreeze liquid inlet at the lower part of the temperature-resistant blowout prevention vertical pipe (600) is connected with an outlet of a liquid storage tank (100) through a high-pressure plunger pump unit (200), an antifreeze liquid outlet at the upper part of the temperature-resistant blowout prevention vertical pipe (600) is connected with an antifreeze liquid inlet (510) of the upper shell (505) in the high-temperature heat insulation blowout prevention device (500), an upper connecting flange (511) of the upper shell (505) is in bolted connection with a connecting flange I (404) of the blowout prevention circulation vertical pipe (400), and antifreeze liquid flows through a closed cavity formed by the blowout prevention circulation vertical pipe (400) and the high-temperature heat insulation blowout prevention device (500) and flows out from an antifreeze liquid outlet of a body (402), the flow-through cooler (300) is connected with the inlet of the liquid storage tank (100).

2. The high temperature and high pressure coiled tubing wellhead protector as claimed in claim 1, wherein: the high-pressure plunger pump unit (200) comprises a variable frequency motor (202) and a plunger pump (203).

3. The high temperature and high pressure coiled tubing wellhead protector as claimed in claim 1, wherein: a closed cavity is formed between an upper shell and a packing cylinder sleeve (503) in the high-temperature heat-insulation blowout preventer (500).

4. The high temperature and high pressure coiled tubing wellhead protector as claimed in claim 1, wherein: the inner wall (603) and the outer wall (604) of the temperature-resistant blowout-preventing vertical pipe (600) are both cylindrical structures, and the diameter of the inner wall (603) is matched with that of the coiled tubing.

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