Annular fluid gas-liquid separation system for high-temperature and high-pressure gas well

Abstract

The invention discloses a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, which adopts a two-stage pressure reduction unit to perform pressure reduction treatment on collected annulus fluid, is provided with a gas-liquid separation module, directly connects the gas-liquid separation module to a high-pressure sampling module to directly perform gas-liquid separation, and realizes gas-liquid separation through separation of the gas-liquid separation unit. The gas and the liquid are respectively tested, the test result of the collected material after two-stage pressure reduction is accurate, the sampling and the gas-liquid separation can be directly carried out under high pressure, the use difficulty is lower, the safety coefficient is high, the test pressure is less than 120MPa, the temperature is less than 200DEG C, and the full-automatic pressure, temperature, flow and pressure recovery online test is realized. The device can be used for annular sampling and gas-liquid separation of a high-pressure and high-temperature gas well, and can also be used for other high-pressure and high-temperature gas-liquid mixing systems.

Description

Technical Field

[0001] The invention relates to the technical field of annular space pressure, and in particular to a high-temperature and high-pressure gas well annular space fluid gas-liquid separation system. Background Art

[0002] At present, foreign countries have carried out certain research on the annulus pressure problem. A complete set of monitoring systems for oil and gas wells with annulus pressure has been formed. A company has developed an annulus pressure monitoring system for oil and gas wells, which can monitor the annulus gas leakage and the annulus liquid level position.

[0003] The annulus pressure monitoring system developed by the company collects information including detailed well information, well production data, corrosion data, well annulus pressure values, leakage rate measurement, fluid analysis, and conducts annulus pressure risk assessment and classification for annulus pressure oil and gas wells.

[0004] There is also an annulus pressure monitoring system to monitor the annulus pressure and annulus gas composition to assist in the safe management of annulus pressure gas wells.

[0005] There is also a ground pressure monitoring automatic recorder, the main function of which is to automatically record the changes in the wellhead annulus pressure, thereby providing real-time pressure data for the annulus pressure control test and providing technical support for on-site annulus pressurization, constant pressure and pressure relief operations.

[0006] A company has developed an on-site gas seal detection system for wellhead equipment and developed on-site detection and diagnosis technology for wellhead equipment. The detection system monitors the sealing status of wellhead equipment in real time by outputting 140MPa water pressure or high-pressure nitrogen, and detects leaks in wellhead equipment through acoustic emission technology.

[0007] The company has also developed an annular pressure monitoring system while drilling. The system consists of a wireless measurement while drilling tool and an annular pressure measurement while drilling tool. It can measure the pressure and temperature data of the annular bottom and transmit it to the ground in real time, so as to accurately understand the changes in bottom hole temperature and pressure, improve the control accuracy of pressure-controlled drilling and deep underbalanced well drilling, and provide technical support for field operations.

[0008] The company has also developed a downhole liquid level monitoring system, which can continuously measure the liquid level position in the annulus and derive the leakage rate of the well-killing fluid based on the liquid level depth in the annulus, providing a basis for reasonably determining the amount of well-killing fluid to be injected during drilling.

[0009] A company has developed an annular pressure well diagnosis and detection technology to address the dangerous situation of annular pressure caused by leakage of offshore oil and gas production pipes. A ground positioning model for downhole pipe leakage based on wellbore pressure distribution was established. A ground detection and diagnosis system for annular pressure suitable for offshore production platforms was developed, which integrates monitoring indicators such as pressure, flow, temperature, liquid level and gas composition. For an offshore production platform, the system successfully diagnosed the pressure source and leakage location of the annular pressure gas well.

[0010] A company has developed an annular pressure test and diagnosis system for high-temperature, high-pressure, high-sulfur well conditions and annular pressure diagnostic test requirements. The system has functions such as high-precision pressure (0.01MPa) real-time storage and transmission, annular air quality component analysis, annular fluid pH value analysis, and pressure relief automatic ignition, which enables rapid diagnosis and analysis of wells with abnormal annular pressure. However, the existing oil and gas well annular pressure diagnosis system pressure level temperature and functional fluid analysis cannot meet the conditions of higher temperature and pressure. The existing equipment has a low safety factor under high temperature and pressure conditions and is difficult to use. Summary of the invention

[0011] The present invention aims to provide a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system to overcome the problems of low safety factor and greater difficulty in use of existing equipment under high temperature and high pressure conditions.

[0012] To achieve the above object, the present invention provides the following technical solutions:

[0013] A high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, a high-pressure sampling module and a gas-liquid separation module;

[0014] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0015] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0016] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0017] Preferably, the sampling and measuring unit comprises a high-pressure safety valve, a first pressure sensor, a high-pressure filter, a first high-pressure electric ball valve, a first temperature sensor, a third manual needle valve and a clamp-type flow meter which are connected in sequence.

[0018] Preferably, the high-pressure filter has a filtration accuracy of 56 μm, an operating temperature of -20°C to 200°C, and a pressure resistance of 20,000 psi.

[0019] Preferably, the first-stage pressure reducing unit comprises two pipelines in parallel, one pipeline comprises a fourth manual needle valve, a first pressure reducing valve, a first safety valve, a second pressure sensor, a first-stage electric heater and a first one-way valve connected in sequence, and the other pipeline comprises a fifth manual needle valve and a second one-way valve connected in sequence.

[0020] Preferably, the maximum wellhead pressure of the first-stage pressure reducing valve is 20,000 psi, and the outlet pressure is 50-6,000 psi.

[0021] Preferably, the secondary pressure reducing unit comprises a secondary pressure reducing valve, a second safety valve, a third pressure sensor, a secondary electric heater and a first temperature sensor which are connected in sequence.

[0022] Preferably, the maximum inlet pressure of the secondary pressure reducing valve is 6000 psi, and the outlet pressure is 10-200 psi.

[0023] Preferably, the gas-liquid separation unit comprises a second high-pressure electric ball valve, an eighth manual needle valve, a secondary filter and a gas-liquid separator which are connected in sequence.

[0024] Preferably, the secondary filter has a filtration accuracy of 5 μm, an operating temperature of -20°C to 200°C, and a pressure resistance of 6000 psi.

[0025] Preferably, a packing separator, a cyclone separator and a gas-liquid separator liquid level controller are sequentially arranged inside the gas-liquid separator.

[0026] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, which adopts a two-stage decompression unit to decompress the collected annulus fluid, and simultaneously provides a gas-liquid separation module, which is directly connected to the high-pressure sampling module to directly perform gas-liquid separation, and the gas and liquid are tested separately through the separation of the gas-liquid separation unit. The test results of the collected materials after the two-stage decompression are accurate, and the two-part operations of sampling and gas-liquid separation can be performed directly under high pressure, with low difficulty of use and high safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a gas-liquid separation system for annular fluid of a high-temperature and high-pressure gas well;

[0028] In the figure, 1-first manual needle valve, 2-first high-pressure three-way, 3-second manual needle valve, 4-high-pressure safety valve, 5-high-pressure safety valve base, 6-first pressure sensor, 7-first pressure sensor base, 8-high-pressure filter, 9-first high-pressure electric ball valve, 10-first temperature sensor, 11-first temperature sensor base, 12-third manual needle valve, 13-second high-pressure three-way, 14-clamp-type flow meter, 15-third high-pressure three-way, 16-fourth manual needle valve, 17-first pressure reducing valve, 18-first safety valve, 19-first safety valve base, 20-second pressure sensor, 21-first electric heater, 22-first check valve, 2 3-fifth manual needle valve, 24-second one-way valve, 25-fourth high-pressure three-way, 26-fifth high-pressure three-way, 27-sixth manual needle valve, 28-secondary pressure reducing valve, 29-second safety valve, 30-second safety valve base, 31-third pressure sensor, 32-third pressure sensor base, 33-sixth high-pressure three-way, 34-seventh manual needle valve, 35-secondary electric heater, 36-first temperature sensor, 37-first temperature sensor base, 38-second high-pressure electric ball valve, 39-eighth manual needle valve, 40-secondary filter, 41-ninth manual needle valve, 42-tenth manual needle valve, 43-gas-liquid separator, 44-gas-liquid separator liquid Position controller, 45-cyclone separator, 46-packing separator, 47-first three-way, 48-eleventh manual needle valve, 49-hydrogen sulfide online monitor base, 50-hydrogen sulfide online monitor, 51-second three-way, 52-fourth pressure sensor, 53-fourth pressure sensor base, 54-first solenoid valve, 55-twelfth manual needle valve, 56-second solenoid valve, 57-vacuum pump, 58 exhaust gas buffer tank, 59-first PH monitor, 60-first PH monitor base, 61-thirteenth manual needle valve, 62-fourteenth manual needle valve, 63-third safety valve, 64-third safety valve base, 65-alkaline solution, 66-second PH monitor base, 67-second PH monitor, 68-flow sensor base, 69-flow sensor, 70-four-way, 71-fourth safety valve, 72-fifth safety valve base, 73-third solenoid valve, 74-fourth solenoid valve, 75-third three-way, 76-fifth pressure sensor, 77-fifth pressure sensor base, 78-fifth solenoid valve, 79-fifteenth manual needle valve, 80-sixth pressure sensor, 81-sixth pressure sensor base, 82-sixth solenoid valve, 83-sixteenth manual needle valve, 84-waste liquid storage tank, 85-seventeenth manual needle valve, 86-waste liquid storage tank level gauge, 87-waste liquid storage tank breathing valve. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0036] like Figure 1The present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, including a high-pressure sampling module and a gas-liquid separation module;

[0037] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0038] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0039] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0040] Yet another embodiment of the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, comprising a high-pressure sampling module and a gas-liquid separation module;

[0041] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0042] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0043] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0044] The sampling and measuring unit comprises a high-pressure safety valve 4, a first pressure sensor 6, a high-pressure filter 7, a first high-pressure electric ball valve 9, a first temperature sensor 10, a third manual needle valve 12 and a clamp-type flow meter 14 which are connected in sequence.

[0045] Yet another embodiment of the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, comprising a high-pressure sampling module and a gas-liquid separation module;

[0046] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0047] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0048] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0049] The sampling and measuring unit comprises a high-pressure safety valve 4, a first pressure sensor 6, a high-pressure filter 8, a first high-pressure electric ball valve 9, a first temperature sensor 10, a third manual needle valve 12 and a clamp-type flow meter 14 which are connected in sequence.

[0050] The high pressure filter 8 has a filtration accuracy of 56 μm, an operating temperature of -20°C to 200°C, and a pressure resistance of 20,000 psi.

[0051] The above specific example only shows one implementation of the high-pressure filter 8. In practical applications, including but not limited to this, no specific limitation is made here and it can be determined according to the specific situation, all of which are within the scope of protection of this application.

[0052] Yet another embodiment of the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, comprising a high-pressure sampling module and a gas-liquid separation module;

[0053] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0054] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0055] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0056] The first-stage pressure reducing unit includes two pipelines in parallel, one pipeline includes a fourth manual needle valve 16, a first pressure reducing valve 17, a first safety valve 18, a second pressure sensor 20, a first-stage electric heater 21 and a first one-way valve 22 connected in sequence, and the other pipeline includes a fifth manual needle valve 23 and a second one-way valve 24 connected in sequence.

[0057] Yet another embodiment of the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, comprising a high-pressure sampling module and a gas-liquid separation module;

[0058] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0059] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0060] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0061] The first-stage pressure reducing unit includes two pipelines in parallel, one pipeline includes a fourth manual needle valve 16, a first pressure reducing valve 17, a first safety valve 18, a second pressure sensor 20, a first-stage electric heater 21 and a first one-way valve 22 connected in sequence, and the other pipeline includes a fifth manual needle valve 23 and a second one-way valve 24 connected in sequence.

[0062] The maximum wellhead pressure of the first-stage pressure reducing valve 17 is 20,000 psi, and the outlet pressure is 50-6,000 psi.

[0063] The above specific example only shows one implementation of the first-stage pressure reducing valve 17. In practical applications, including but not limited to this, no specific limitation is made here and it can be determined according to the specific situation, all of which are within the scope of protection of this application.

[0064] Yet another embodiment of the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, comprising a high-pressure sampling module and a gas-liquid separation module;

[0065] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0066] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0067] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0068] The secondary pressure reducing unit includes a secondary pressure reducing valve 28 , a second safety valve 29 , a third pressure sensor 31 , a secondary electric heater 35 and a first temperature sensor 36 which are connected in sequence.

[0069] Yet another embodiment of the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, comprising a high-pressure sampling module and a gas-liquid separation module;

[0070] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0071] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0072] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0073] The secondary pressure reducing unit includes a secondary pressure reducing valve 28 , a second safety valve 29 , a third pressure sensor 31 , a secondary electric heater 35 and a first temperature sensor 36 which are connected in sequence.

[0074] The maximum inlet pressure of the secondary pressure reducing valve 28 is 6000 psi, and the outlet pressure is 10-200 psi.

[0075] The above specific example only shows one implementation of the secondary pressure reducing valve 28. In practical applications, including but not limited to this, no specific limitation is made here and it can be determined according to the specific situation, all of which are within the scope of protection of this application.

[0076] Yet another embodiment of the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, comprising a high-pressure sampling module and a gas-liquid separation module;

[0077] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0078] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0079] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0080] The gas-liquid separation unit includes a second high-pressure electric ball valve 38 , an eighth manual needle valve 39 , a secondary filter 40 and a gas-liquid separator 43 which are connected in sequence.

[0081] Yet another embodiment of the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, comprising a high-pressure sampling module and a gas-liquid separation module;

[0082] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0083] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0084] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0085] The gas-liquid separation unit includes a second high-pressure electric ball valve 38 , an eighth manual needle valve 39 , a secondary filter 40 and a gas-liquid separator 43 which are connected in sequence.

[0086] The secondary filter has a filtration accuracy of 5 μm, an operating temperature of -20°C to 200°C, and a pressure resistance of 6000 psi.

[0087] The above specific example only shows one implementation of the secondary filter 40. In practical applications, including but not limited to this, no specific limitation is made here and it can be determined according to the specific circumstances, all of which are within the scope of protection of this application.

[0088] Yet another embodiment of the present invention provides a high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, comprising a high-pressure sampling module and a gas-liquid separation module;

[0089] The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence;

[0090] The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit;

[0091] The gas-liquid separation unit is connected to the secondary pressure reducing unit.

[0092] The gas-liquid separation unit includes a second high-pressure electric ball valve 38 , an eighth manual needle valve 39 , a secondary filter 40 and a gas-liquid separator 43 which are connected in sequence.

[0093] The gas-liquid separator 40 is provided with a packing separator 46 , a cyclone separator 45 and a gas-liquid separator liquid level controller 44 in sequence.

[0094] The invention can analyze the components of the annular fluid of high-temperature and high-pressure oil and gas wells, and test the annular pressure, temperature, and flow rate at the same time. It has a pressure resistance of 120MPa and a temperature resistance of 200℃, and is designed in a modular manner. The specific functions are: online measurement of flow rate (flow), temperature, and pressure; online separation and filtration of gas and liquid phases; and online sampling.

[0095] Example:

[0096] The oil and gas well pressure sampling and analysis system consists of two parts: annulus high-pressure sampling and gas-liquid separation, all of which are automatically controlled.

[0097] (1) The high-pressure sampling pressure reducing part is composed of the first manual needle valve 1, the first high-pressure three-way valve 2, the second manual needle valve 3, the high-pressure safety valve 4, the high-pressure safety valve base 5, the first pressure sensor 6, the first pressure sensor base 7, the high-pressure filter 8, the first high-pressure electric ball valve 9, the first temperature sensor 10, the first temperature sensor base 11, the third manual needle valve 12, the second high-pressure three-way valve 13, the clamp-type flow meter 14, the third high-pressure three-way valve 15, the fourth manual needle valve 16, the first pressure reducing valve 17, the first safety valve 18, the first safety valve 19, the first pressure sensor 20, the first pressure sensor base 21, the first pressure sensor 22, the first pressure sensor base 23, the first pressure sensor base 24, the first pressure sensor base 25, the first pressure sensor base 26, the first pressure sensor 27, the first pressure sensor base 28, the first pressure sensor base 29, the first pressure sensor base 30, the first pressure sensor base 31, the first pressure sensor base 32, the first pressure sensor base 33, the first pressure sensor base 34, the first pressure sensor base 35, the first pressure sensor base 36, the first pressure reducing valve 37, the first pressure sensor base 38, the first pressure sensor base 39, the first pressure sensor base 40, the first pressure sensor base 41, the first pressure sensor base 42, the first pressure sensor base 43, the first pressure sensor base 44, the first pressure sensor base 45, the first pressure sensor base 46, the first pressure reducing valve 47, the first pressure sensor base 48, the first pressure sensor base 49, the first pressure sensor base 50, the first pressure sensor base 51, the first pressure sensor base 52, the first pressure sensor base 53, the first pressure sensor base 54, the first pressure sensor base 55 The valve base 19, the second pressure sensor 20, the first electric heater 21, the first check valve 22, the fifth manual needle valve 23, the second check valve 24, the fourth high-pressure three-way 25, the fifth high-pressure three-way 26, the sixth manual needle valve 27, the second pressure reducing valve 28, the second safety valve 29, the second safety valve base 30, the third pressure sensor 31, the third pressure sensor base 32, the sixth high-pressure three-way 33, the seventh manual needle valve 34, the second electric heater 35, the first temperature sensor 36, and the first temperature sensor base 37. All components are connected together with stainless steel seamless pipes, and all joints are ferrule joints.

[0098] The filtration accuracy of high-pressure filter 8 is 56μm, the working temperature is -20℃~200℃, and the pressure resistance is 20000psi; the maximum wellhead pressure of the first-stage pressure reducing valve is 20000psi, and the outlet pressure is adjustable from 50 to 6000psi; the maximum inlet pressure of the second-stage pressure reducing valve is 6000psi, and the outlet pressure is adjustable from 10 to 200psi. The connection method of the pressure reducing valve is 3 / 8in NPT buckle type.

[0099] Connection position: The connection position is connected to the HF99 / 16″-30000psi-F buckle type interface on the instrument flange marked 12 in the production (oil) and gas tree diagram or the 1 / 2″NPT buckle type interface on the plug marked 4.

[0100] (2) The gas-liquid separation module is designed to withstand a pressure of 10 MPa and an operating pressure of less than 1 MPa. It consists of a second high-pressure electric ball valve 38, an eighth manual needle valve 39, a secondary filter 40, a ninth manual needle valve 41, a tenth manual needle valve 42, a gas-liquid separator 43, a gas-liquid separator level controller 44, a cyclone separator 45, a packing separator 46, a first three-way valve 47, an eleventh manual needle valve 48, a hydrogen sulfide online monitor base 49, a hydrogen sulfide online monitor 50, a second three-way valve 51, a fourth pressure sensor 52, a fourth pressure sensor base 53, a first solenoid valve 54, a twelfth manual needle valve 55, a second solenoid valve 56, a vacuum pump 57, an exhaust gas buffer tank 58, a first pH monitor 59, a first pH monitor base 60, a thirteenth The manual needle valve 61, the fourteenth manual needle valve 62, the third safety valve 63, the third safety valve base 64, the alkaline solution 65, the second pH monitor base 66, the second pH monitor 67, the flow sensor base 68, the flow sensor 69, the four-way valve 70, the fourth safety valve 71, the fifth safety valve base 72, the third solenoid valve 73, the fourth solenoid valve 74, the third three-way valve 75, the fifth pressure sensor 76, the fifth pressure sensor base 77, the fifth solenoid valve 78, the fifteenth manual needle valve 79, the sixth pressure sensor 80, the sixth pressure sensor base 81, the sixth solenoid valve 82, the sixteenth manual needle valve 83, the waste liquid storage 84, the seventeenth manual needle valve 85, the waste liquid storage tank level gauge 86, the waste liquid storage tank breathing valve 87. All parts are connected together with stainless steel seamless pipes, and all joints are ferrule joints.

[0101] The secondary filter has a filtration accuracy of 5μm, an operating temperature of -20℃~200℃, and a pressure resistance of 6000psi.

[0102] The gas-liquid separation part adopts two-stage separation. In the first-stage cyclone separation, the cyclone separator 45 has a free gas phase and liquid phase separation rate of 90%; in order to ensure that the liquid phase in the gas phase is as small as possible, the cyclone separation gas enters the second-stage filtration separation section for further separation, and the filtration separation free gas phase and liquid phase separation rate is 95%; the overall free gas phase and liquid phase separation rate reaches 98%, and the gas phase and liquid phase after separation enter the component testing system respectively.

[0103] The high-pressure sampling part and the gas-liquid separation part are connected by a high-pressure hose to form a connected system.

[0104] (3) Online flow measurement

[0105] The online tests include pressure, flow and temperature. The high pressure sampling module is equipped with a first pressure sensor 6, a first temperature sensor 10, a clamp-type flow meter 14, a second pressure sensor 20 after the first stage of decompression, a third pressure sensor 31 after the second stage of decompression and a first temperature sensor 36;

[0106] The gas-liquid separation module is provided with a hydrogen sulfide online detector 50, a fourth pressure sensor 52, which is a gas phase pressure sensor, a second pH monitor 67, a flow sensor 69, a fifth pressure sensor base 77 and a sixth pressure sensor 80, which are liquid phase pressure sensors. There are 12 monitoring points in total.

[0107] The electric control points are: the first high-pressure electric ball valve 9, the first-level electric heater 21, the second-level electric heater 35, the second high-pressure electric ball valve 38, the gas-liquid separator level controller 44, the first solenoid valve 54, the waste liquid storage tank level gauge 86, the fourth solenoid valve 74, the fifth solenoid valve 78, the sixth solenoid valve 82, the second solenoid valve 56, and the vacuum pump 57. A total of 12 control points

[0108] The closest technology to the above has a test pressure below 25MPa and a temperature below 150℃, which is not suitable for online testing of annular fluid in high-temperature and high-pressure oil wells and cannot achieve fully automatic online testing; the test pressure of the present invention is below 120MPa and the temperature is below 200℃, achieving fully automatic online testing of pressure, temperature, flow and pressure recovery. The invention can not only be used in high-pressure and high-temperature gas wells for annular sampling and gas-liquid separation, but also in other high-pressure and high-temperature gas-liquid mixing systems.

[0109] Specific installation method of high pressure sampling module:

[0110] The HF9 9 / 16″-30000psi-F buckle interface on the instrument flange of the annulus or the 1 / 2″NPT buckle interface on the plug is connected to the liquid inlet line of the high-pressure sampling part with a threaded high-pressure hose with a pressure resistance of 30000psi. The liquid inlet pipe is a 80-grade 3 / 8in×0.065in 2205 stainless steel capillary.

[0111] The other end of the liquid inlet pipeline is connected to the inlet of the high-pressure first high-pressure tee 2 using a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0112] One outlet end of the high-pressure first high-pressure tee 2 is connected to the high-pressure first manual needle valve 1 of the vent port by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0113] One outlet is connected to the inlet of the second manual needle valve 3 of the sampling line by using a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0114] The outlet of the second manual needle valve 3 is connected to the inlet of the high-pressure safety valve base 5 by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the 120MPa high-pressure safety valve 4 is installed on the high-pressure safety valve base 5 by threaded connection;

[0115] The outlet of the high-pressure safety valve base 5 is connected to the inlet of the first pressure sensor base 7 by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the first pressure sensor 6 is installed on the first pressure sensor base 7 by a threaded connection;

[0116] The outlet of the first pressure sensor base 7 is connected to the inlet of the high pressure filter 8 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0117] The outlet of the high-pressure filter 8 is connected to the inlet of the high-pressure electric ball valve 9 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0118] The outlet of the high-pressure electric ball valve 9 is connected to the inlet of the first temperature sensor base 11 by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the first temperature sensor 10 is installed on the first temperature sensor base 11 by a threaded connection;

[0119] The outlet of the first temperature sensor base 11 is connected to the inlet of the second high-pressure tee 13, one outlet of the second high-pressure tee 13 is connected to the inlet of the third manual needle valve 12 of the pressure test interface by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the outlet of the third manual needle valve 12 of the pressure test interface is connected to the pressure test equipment;

[0120] The other outlet of the second high-pressure tee 13 is connected to a section of 80-grade 3 / 8in×0.065in2205 stainless steel capillary tube by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the clamp-type flow meter 14 is installed on the outer wall of the 80-grade 3 / 8in×0.065in2205 stainless steel capillary tube;

[0121] The other end of the 80-grade 3 / 8in×0.065in2205 stainless steel capillary is connected to the third high-pressure tee 15 using a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0122] One outlet of the third high-pressure tee 15 is connected to the inlet of the high-pressure fourth manual needle valve 16 by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the outlet of the high-pressure fourth manual needle valve 16 is connected to the inlet of the first-stage pressure reducing valve 17 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0123] The outlet of the first-stage pressure reducing valve 17 is connected to the inlet of the first safety valve base 19 by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the 41MPa first safety valve 18 is installed on the first safety valve base 19 by threaded connection;

[0124] The outlet of the first safety valve base 19 is connected to the inlet of the second pressure sensor 20 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0125] The outlet of the second pressure sensor 20 is connected to a section of 80-grade 3 / 8in×0.065in2205 stainless steel capillary tube by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the first-stage electric heater 21 is installed on the outer wall of the 80-grade 3 / 8in×0.065in2205 stainless steel capillary tube;

[0126] The other end of the 80-grade 3 / 8in×0.065in2205 stainless steel capillary is connected to the inlet of the first check valve 22 using a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0127] The outlet of the first check valve 22 is connected to an inlet of the fourth high-pressure tee 25 by a HF9 9 / 16″-30000psi-F buckle type ferrule, and one outlet of the fourth high-pressure tee 25 is connected to the inlet of the high-pressure fifth manual needle valve 23 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0128] The outlet of the high-pressure fifth manual needle valve 23 is connected to the inlet of the second check valve 24 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0129] The outlet of the second check valve 24 is connected to the other inlet of the fourth high-pressure tee 25 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0130] The outlet of the fourth high-pressure tee 25 is connected to the inlet of the fifth high-pressure tee 26 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0131] One outlet of the fifth high-pressure tee 26 is connected to the inlet of the sixth high-pressure manual needle valve 27 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0132] The outlet of the high-pressure sixth manual needle valve 27 is connected to the inlet of the tenth manual needle valve 42 by a high-pressure hose, and the outlet of the tenth manual needle valve 42 is connected to the waste liquid storage tank 84 by a stainless steel pipe;

[0133] The other outlet of the fifth high-pressure tee 26 is connected to the inlet of the secondary pressure reducing valve 28 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0134] The outlet of the secondary pressure reducing valve 28 is connected to the inlet of the second safety valve base 30 by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the second safety valve 29 is installed on the second safety valve base 30 by threading;

[0135] The outlet of the second safety valve base 30 is connected to the inlet of the third pressure sensor base 32 by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the third pressure sensor 31 is installed on the third pressure sensor base 32 by threading;

[0136] The outlet of the third pressure sensor base 32 is connected to the inlet of the sixth high-pressure tee 33 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0137] One outlet of the sixth high-pressure tee 33 is connected to the inlet of the seventh high-pressure manual needle valve 34 by a HF9 9 / 16″-30000psi-F buckle type ferrule;

[0138] The outlet of the high-pressure seventh manual needle valve 34 is connected to the inlet of the ninth manual needle valve 41 by a high-pressure hose, and the outlet of the ninth manual needle valve 41 is connected to the waste liquid storage tank 84 by a stainless steel pipe;

[0139] The other outlet of the sixth high-pressure tee 33 is connected to a section of 80-grade 3 / 8in×0.065in2205 stainless steel capillary tube by a HF9 9 / 16″-30000psi-F buckle type ferrule, and the secondary electric heater 35 is installed on the outer wall of the 80-grade 3 / 8in×0.065in2205 stainless steel capillary tube;

[0140] The other end of the 80-grade 3 / 8in×0.065in2205 stainless steel capillary is connected to the inlet of the first temperature sensor base 37 with a HF9 9 / 16″-30000psi-F buckle-type ferrule, and the first temperature sensor 36 is installed on the first temperature sensor base 37 with a threaded form; the outlet of the first temperature sensor base 37 is connected to the output end of the high-pressure sampling device with a HF9 9 / 16″-30000psi-F buckle-type ferrule.

[0141] Installation method of gas-liquid separation part:

[0142] The output end of the high-pressure sampling device is connected to the inlet of the second high-pressure electric ball valve 38 of the gas-liquid separation part by a high-pressure hose with a 1 / 2″ NPT buckle-type thread and a pressure resistance of 30,000 psi, and the outlet of the second high-pressure electric ball valve 38 is connected to the inlet of the high-pressure eighth manual needle valve 39 by a ferrule with a 1 / 2″ NPT buckle-type thread;

[0143] The outlet of the eighth high-pressure manual needle valve 39 is connected to the inlet of the secondary filter 40 by a 1 / 2″ NPT buckle-type threaded ferrule;

[0144] The outlet of the secondary filter 40 is connected to the inlet of the 20L gas-liquid separator 43 with a 1 / 2″NPT threaded ferrule;

[0145] The gas-liquid separator level controller 44 is installed in the form of a thread at the lower third of the height of the gas-liquid separator 43; the cyclone separator 45 is installed at the upper third of the inner part of the gas-liquid separator 43, and the packing separator 46 is installed 100 mm above the cyclone separator 45;

[0146] The gas phase outlet of the gas-liquid separator 44 is located at the top outlet and is connected to the inlet of the first tee 47 with a 1 / 2" NPT threaded ferrule. One outlet of the first tee 47 is connected to the inlet of the third safety valve base 64 with a 1 / 2" NPT threaded ferrule. The third safety valve 63 is installed on the third safety valve base 64 in a threaded form.

[0147] The outlet of the third safety valve base 64 is connected to the exhaust buffer 58 with a 1 / 2″ NPT threaded ferrule;

[0148] The other outlet of the first three-way valve 47 is connected to the inlet of the eleventh manual needle valve 48 by a 1 / 2″ NPT threaded ferrule;

[0149] The outlet of the eleventh manual needle valve 48 is connected to the inlet of the hydrogen sulfide online detector base 49 by a 1 / 2″ NPT threaded ferrule, and the hydrogen sulfide online monitor 50 is installed on the hydrogen sulfide online detector base 49 by threading;

[0150] The outlet of the hydrogen sulfide online detector base 49 is connected to the inlet of the second tee 51 with a 1 / 2" NPT threaded ferrule, one outlet of the second tee 51 is connected to the inlet of the second solenoid valve 56 with a 1 / 2" NPT threaded ferrule, the outlet of the second solenoid valve 56 is connected to the inlet of the vacuum pump 57 with a 1 / 2" NPT threaded ferrule, and the outlet of the vacuum pump 57 is connected to the exhaust buffer 58 with a 1 / 2" NPT threaded ferrule;

[0151] The other outlet of the second tee 51 is connected to the wellhead of the fourth pressure sensor base 53 by a 1 / 2″ NPT threaded ferrule, and the fourth pressure sensor 52 is installed on the fourth pressure sensor base 53 by threading;

[0152] The outlet of the fourth pressure sensor base 53 is connected to the inlet of the first solenoid valve 54 by a 1 / 2″ NPT threaded ferrule;

[0153] The outlet of the first solenoid valve 54 is connected to the inlet of the twelfth manual needle valve 55 by a 1 / 2″ NPT threaded ferrule, and the outlet of the twelfth manual needle valve 55 is connected to the gas;

[0154] The exhaust gas buffer 58 is cylindrical in shape, with a fourteenth manual needle valve 62 installed at the bottom, an alkaline solution 65 installed at a height of 300 mm inside, a first PH online monitor base 60 installed 150 mm below, a first PH online monitor 59 installed on the first PH online monitor base 60 in a threaded form, and the outlet of the first PH online monitor base 60 is connected to the inlet of the thirteenth manual needle valve 61 with a 1 / 2″ NPT buckle threaded ferrule, and the manual needle valve is vented after it is discharged.

[0155] The liquid phase outlet of the gas-liquid separator liquid level controller 44 is located at the bottom and is connected to the inlet of the second pH value detector base 66 with a 1 / 2″ NPT threaded ferrule. The second pH value detector 67 is installed on the second pH value detector base 66 in a threaded form.

[0156] The outlet of the second pH value detector base 66 is connected to the inlet of the flow sensor base 69 by a 1 / 2″ NPT threaded ferrule, and the flow sensor 68 is installed on the flow sensor base 69 by threading;

[0157] The outlet of the flow sensor base 69 is connected to the first port of the cross-way 70 with a 1 / 2" NPT threaded ferrule, and the second port of the cross-way 70 is connected to the inlet of the fifth safety valve base 72 with a 1 / 2" NPT threaded ferrule. The 1MPa fifth safety valve 71 is installed on the fifth safety valve base 72 in a threaded form.

[0158] The outlet of the fifth safety valve base 72 is connected to a 100L waste liquid storage tank by a pipeline;

[0159] The third port of the cross-way 70 is connected to the inlet of the third solenoid valve 73 with a 1 / 2" NPT threaded ferrule; the outlet of the third solenoid valve 73 is connected to the inlet of the fourth solenoid valve 74 with a 1 / 2" NPT threaded ferrule; the outlet of the fourth solenoid valve 74 is connected to the waste liquid storage tank with a pipeline;

[0160] The fourth port of the cross-way 70 is connected to the inlet of the third tee 75 with a 1 / 2" NPT threaded ferrule, one outlet of the third tee 75 is connected to the inlet of the fifth pressure sensor base 77 with a 1 / 2" NPT threaded ferrule, the fifth pressure sensor 76 is installed on the fifth pressure sensor base 77 with a threaded form, and the outlet of the fifth pressure sensor base 77 is connected to the inlet of the fifth solenoid valve 78 with a 1 / 2" NPT threaded ferrule;

[0161] The outlet of the fifth solenoid valve 78 is connected to the inlet of the fifteenth manual needle valve 79 by a 1 / 2″ NPT threaded ferrule;

[0162] The outlet of the fifteenth manual needle valve 79 is connected to an external device;

[0163] The other outlet of the third tee 75 is connected to the inlet of the sixth pressure sensor base 81 by a 1 / 2″ NPT threaded ferrule, and the sixth pressure sensor 80 is installed on the sixth pressure sensor base 81 by a threaded structure;

[0164] The outlet of the sixth pressure sensor base 81 is connected to the inlet of the sixth solenoid valve 82 by a 1 / 2″ NPT threaded ferrule;

[0165] The outlet of the sixth solenoid valve 82 is connected to the inlet of the sixteenth manual needle valve 83 by a 1 / 2″ NPT buckle-type threaded ferrule; the outlet of the sixteenth manual needle valve 83 is connected to an external device.

[0166] The main body of the 100L waste liquid storage tank 84 is cylindrical, and the bottom is conical and is equipped with the seventeenth manual needle valve 85 for emptying. The outlet of the manual needle valve 85 is connected to the venting pipeline; the top of the 100L waste liquid storage tank is equipped with a waste liquid storage tank level gauge 86, a waste liquid storage tank breathing valve 87 and various pipelines for discharging from the gas-liquid separator 44.

[0167] The high-pressure sampling part and the gas-liquid separation part are connected by a high-pressure hose to form a connected system.

[0168] Although the embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative and instructive, rather than restrictive. Under the guidance of the specification, a person skilled in the art can also make many forms without departing from the scope of protection of the claims of the present invention, all of which belong to the scope of protection of the present invention.

Claims

1. A high-temperature and high-pressure gas well annulus fluid gas-liquid separation system, characterized in that: High pressure sampling module and gas-liquid separation module; The high-pressure sampling module includes a sampling and measuring unit, a primary pressure reducing unit and a secondary pressure reducing unit connected in sequence; The gas-liquid separation module comprises a gas-liquid separation unit, a gas testing unit and a liquid testing unit, and the gas testing unit and the liquid testing unit are respectively connected to the gas-liquid separation unit; The gas-liquid separation unit is connected to the secondary pressure reducing unit.

2. A high-temperature and high-pressure gas well annulus fluid gas-liquid separation system according to claim 1, characterized in that: The sampling and measuring unit comprises a high-pressure safety valve (4), a first pressure sensor (6), a high-pressure filter (8), a first high-pressure electric ball valve (9), a first temperature sensor (10), a third manual needle valve (12) and a clamp-type flow meter (14) which are connected in sequence.

3. A high-temperature and high-pressure gas well annulus fluid gas-liquid separation system according to claim 2, characterized in that: The high pressure filter (8) has a filtration accuracy of 56 μm, an operating temperature of -20°C to 200°C, and a pressure resistance of 20,000 psi.

4. A high-temperature and high-pressure gas well annulus fluid gas-liquid separation system according to claim 1, characterized in that: The primary pressure reducing unit comprises two pipelines connected in parallel, one pipeline comprising a fourth manual needle valve (16), a first pressure reducing valve (17), a first safety valve (18), a second pressure sensor (20), a primary electric heater (21) and a first one-way valve (22) connected in sequence, and the other pipeline comprising a fifth manual needle valve (23) and a second one-way valve (24) connected in sequence.

5. A high-temperature and high-pressure gas well annulus fluid gas-liquid separation system according to claim 4, characterized in that: The maximum wellhead pressure of the first-stage pressure reducing valve (17) is 20,000 psi, and the outlet pressure is 50-6,000 psi.

6. The high-temperature and high-pressure gas well annulus fluid gas-liquid separation system according to claim 1, characterized in that: The secondary pressure reducing unit comprises a secondary pressure reducing valve (28), a second safety valve (29), a third pressure sensor (31), a secondary electric heater (35) and a first temperature sensor (36) which are connected in sequence.

7. A high-temperature and high-pressure gas well annulus fluid gas-liquid separation system according to claim 6, characterized in that: The maximum inlet pressure of the secondary pressure reducing valve (28) is 6000 psi, and the outlet pressure is 10-200 psi.

8. The high-temperature and high-pressure gas well annulus fluid gas-liquid separation system according to claim 1, characterized in that: The gas-liquid separation unit comprises a second high-pressure electric ball valve (38), an eighth manual needle valve (39), a secondary filter (40) and a gas-liquid separator (43) which are connected in sequence.

9. A high-temperature and high-pressure gas well annulus fluid gas-liquid separation system according to claim 8, characterized in that: The secondary filter (40) has a filtering accuracy of 5 μm, an operating temperature of -20°C to 200°C, and a pressure resistance of 6000 psi.

10. A high-temperature and high-pressure gas well annulus fluid gas-liquid separation system according to claim 8, characterized in that: A packing separator (46), a cyclone separator (45) and a gas-liquid separator liquid level controller (44) are sequentially arranged inside the gas-liquid separator (40).

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