Homogeneous reduction device for detecting loss gas in oil field

Abstract

The invention provides a homogeneous reduction device for oil field depleted gas detection, and belongs to the technical field of oil field depleted gas detection. According to the technical scheme, the homogeneous reduction device for detecting the loss gas in the oil field is characterized by comprising a constant-temperature transfer device, a constant-temperature gas conveying pipe and a constant-temperature heating box, the constant-temperature transfer device wraps the outer wall of the sampling equipment, a hot air channel is formed between the constant-temperature transfer device and the outer wall of the sampling equipment, and the channel is provided with an air inlet pipe and an air outlet pipe; the constant-temperature heating box is used for heating gas; and the constant-temperature gas conveying pipe is used for communicating the exhaust pipe of the constant-temperature heating box with the gas inlet pipe of the channel. The method has the beneficial effects that by developing a gas sample homogeneous phase reduction technology, the initial temperature and pressure environment of oil gas in a storage tank and other emission sources can be accurately reduced, and the test accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield lost gas detection, and in particular to a uniform phase reduction device for oilfield lost gas detection. Background Art

[0002] At present, the situation of oilfield exploitation is becoming increasingly severe, and oil and gas resources are constantly decreasing. Most oilfield enterprises pay special attention to energy conservation and emission reduction, focusing on reducing oil and gas losses. Oilfields, joint stations, oil depots, etc. will inevitably produce oil and gas losses in the process of oil production and development, causing great waste of resources, environmental pollution and great hidden dangers to production safety. Since the loss gas of petroleum products is mainly alkanes within C6, although the content of heavy components is relatively small, it cannot be ignored. It also includes associated gases such as O2, N2, and CO2. The lighter the component, the greater the volatility. The main sources of loss gas are as follows: ① The temperature difference and pressure difference caused by weather changes during oil storage and transportation lead to small breathing losses; ② Evaporation losses caused by oil transfer, loading and unloading; ③ Evaporation losses caused by oil extraction; ④ Evaporation losses caused by human factors.

[0003] At present, the commonly used methods for measuring oil and gas loss in stations are direct air intake method and low-temperature secondary condensation method. The direct air intake method uses the principle of negative pressure to collect loss gas samples into air bags. This method has complex equipment. For crude oil loss tests that may involve high-altitude operations, it is not suitable for daily testing work from a safety perspective. It is also unable to restore the initial temperature and pressure environment, causing the heavy components to condense, affecting the detection accuracy. The low-temperature secondary condensation method uses the principle of condensation to condense the heavy components in the collected gas sample into a condenser in the form of a liquid, and then uses an injection needle to extract the condensed exhaust gas. Finally, the condensate sample in the condenser and the sampled gas are subjected to relevant tests and chromatographic analysis. The operation of the low-temperature secondary condensation method is relatively complicated, and the equipment is not portable, which can easily cause large errors during the test process. Summary of the invention

[0004] The purpose of the present invention is to design a uniform phase reduction device for detecting lost gas in oil fields in order to solve the above-mentioned problem of lost gas testing accuracy, to test gas samples more efficiently, economically and conveniently, and to provide technical support for the calculation of oil and gas losses.

[0005] The present invention is realized by the following measures: an oilfield loss gas detection uniform phase reduction device, characterized in that it includes a constant temperature transfer device, a constant temperature gas transmission pipe and a constant temperature heating box; The constant temperature transfer device is wrapped on the outer wall of the sampling device and has a hot air channel between the device and the outer wall of the sampling device, wherein the channel has an air inlet pipe and an air outlet pipe; The constant temperature heating box is used to heat the gas; The constant temperature air delivery pipe is used to connect the exhaust pipe of the constant temperature heating box with the air inlet pipe of the channel.

[0006] The constant temperature transfer device comprises a heat transfer inner tube and a heat transfer outer tube which are arranged concentrically, an inner hot gas channel is formed between the inner wall of the heat transfer inner tube and the outer wall of the sampling device, and an outer hot gas channel is formed between the inner wall of the heat transfer outer tube and the outer wall of the heat transfer inner tube; The air inlet pipe is connected to the inner hot air channel, the air outlet pipe is connected to the outer hot air channel, and a vent hole connecting the inner hot air channel and the outer hot air channel is provided on the side wall of the inner heat transfer tube; the air outlet pipe and the air inlet pipe are threadedly connected, and continuous heating of the sampling equipment is achieved through the connection between the air inlet pipe and the exhaust pipe.

[0007] The constant temperature transfer device also includes a cover for blocking the hot gas inner channel and the hot gas outer channel. One of the covers is provided with an opening for allowing the sampling head of the sampling device to pass through, and the other cover is provided with an operating hole matching the operating end of the sampling device.

[0008] The outer side of the heat transfer outer tube is covered with a heat insulation shell.

[0009] The constant temperature heating box includes a sealed box body, a hot air system arranged inside the box body to heat air, a thick pipe section connected to the air outlet of the hot air system, a thin pipe section connected to the thick pipe section, and the thin pipe section is provided with a plurality of exhaust pipes connected to the air inlet pipe, and a valve is provided on the exhaust pipe. The valve on the exhaust pipe can be a micro ball valve to control the hot air flow.

[0010] The exhaust pipe is located at the lower part of the box, the hot air system, the thick pipe section and the thin pipe section are located at the bottom of the box, and the bottom of the box is provided with a clamp for fixing the hot air system, the thick pipe section and the thin pipe section. The hot air system adopts the existing technology, which will not be described in detail here. As long as the air can be heated and then input into the constant temperature transfer device, the continuous entry of air can be achieved.

[0011] Two mesh partitions with adjustable spacing are arranged on the upper inner wall of the box body, and the thick pipe section is connected to a vertical thick pipe section with an opening facing the mesh partition; a valve is arranged on the vertical thick pipe section; the box body adopts a double-layer box structure, and an inner box and an outer box are arranged in the area where the mesh partition is placed, and thermal insulation material is added in the middle to ensure uniform temperature inside the box.

[0012] The upper part of the box body is provided with a valve-type vent hole which is communicated with the inner space of the box body.

[0013] It also includes a squeezing rod that passes through the valve-type vent hole to squeeze the mesh partition. The two mesh partitions cooperate with the squeezing rod to have a squeezing function, which is convenient for taking out and transferring the gas sample after heating the sampling bag placed between the two mesh partitions.

[0014] The air inlet pipe and the air outlet pipe are located at the same end and on different sides of the constant temperature transducer, and the vent hole is located at the other end of the constant temperature transducer.

[0015] The lower part of the side wall of the box body is provided with heat dissipation holes.

[0016] The constant temperature gas transmission pipe has a double-layer insulation layer, including a latex inner tube and a silicone outer tube, and the interval between the latex inner tube and the silicone outer tube is in the shape of an airway.

[0017] A wire spring winding structure is designed between the latex inner tube and the silicone outer tube to avoid direct contact between the two layers of rubber tubes and ensure uniform heating.

[0018] One of the covers is provided with an opening for allowing the sampling head of the sampling device to pass through, and the other cover is provided with an operating hole matching the operating end of the sampling device.

[0019] The inner wall of the box body is provided with a plurality of slots for placing the mesh partitions, and the box body is provided with doors at positions corresponding to the slots. The height of the slots is greater than the thickness of the mesh partitions, generally 2-4 times.

[0020] The sealing cover is fixed by threaded connection, and an annular boss inserted into the hot gas inner channel and the hot gas outer channel is arranged on the sealing cover.

[0021] When there is a gap between the heat-insulating shell and the heat-transfer outer tube, the cover is provided with an annular boss inserted into the gap and the cover is arranged in the gap through a threaded connection, an internal thread is arranged on the heat-transfer outer tube, and an external thread is arranged on the cover. The cover adopts a dodecagonal design to facilitate disassembly and installation.

[0022] Specific usage: Usage plan 1: Use a 100 ml glass syringe as a loss gas sampler.

[0023] Step 1. Prepare a 100 ml glass syringe, a silica gel block, and a constant temperature gas pipe; Step 2: Place the glass syringe in a constant temperature heating box and heat it to 80°C, take it out and repeatedly pump and push to empty it, and seal the needle with a silicone block for later use; Step 3, take out the silica gel block and sample the lost gas on site. If there are multiple sampling points, prepare multiple sampling glass syringes and process according to the above steps; Step 4: seal the glass syringe with a silicone block and send it to the on-site laboratory; Step 5, install the glass syringe into the matching constant temperature transfer device; Step 6: Prepare the constant temperature heating box, close the valve of the valve-type vent on the top of the box, and connect the exhaust pipe on the side of the constant temperature heating box and the air inlet pipe on the constant temperature transfer device with a constant temperature gas pipe; Step 7, turn on the heating switch of the heating box, and the hot air passes through the hot air system, the thick pipe section, the thin pipe section and the exhaust pipe, enters the inner hot air channel, the vent hole and the hot air outer channel through the air inlet pipe, and is finally discharged through the air outlet pipe; When the temperature stabilizes at 80°C, push the gas sample in the glass syringe in the constant temperature transfer device into the chromatograph in the on-site laboratory to analyze and test the components of the lost gas sample; Step 8: Turn off the heating box and remove the connecting device.

[0024] Usage option 2: Use gas collection bags for on-site use.

[0025] Step 1: Prepare the gas sample collection bag, explosion-proof atmospheric sampler, and constant temperature gas pipeline; Step 2: Use a constant temperature gas transmission pipe with an explosion-proof atmospheric sampler to sample the on-site loss gas and deliver the gas bag to the laboratory; Step 3, place the gas sample bag between the two layers of mesh partitions of the constant temperature heating box, connect the gas sample bag outlet and the chromatograph inlet of the on-site laboratory with a constant temperature gas pipe, close the box door, turn on the heating switch of the heating box, and the hot air enters the box through the hot air system, the thick pipe section and the vertical thick pipe section to heat the gas sample bag, and is discharged from the valve vent after the heating temperature stabilizes to 80°C; Step 4, press down the extrusion rod on the heating box to squeeze the gas sample in the gas sample bag into the chromatograph, and then analyze and test the components of the lost gas sample; Step 5: Turn off the heating box and remove the connecting device.

[0026] Usage plan three: Use the air bag in conjunction with the transfer device.

[0027] Step 1: Prepare the gas sample collection bag, explosion-proof atmospheric sampler, and constant temperature gas pipeline; Step 2: Use a constant temperature gas transmission pipe with an explosion-proof atmospheric sampler to sample the on-site loss gas, and send the gas sample bag to the laboratory; Step 3: Place the gas sample bag in a heating box, turn on the heating switch of the heating box, and stabilize the temperature to 80°C; Step 4: Use the thermostatic transfer device provided with the chromatograph and use heat-insulating gloves to directly extract a suitable volume of gas sample from the gas sample bag; Step 5, injecting the gas sample in the thermostatic transfer device supporting the chromatograph into the chromatograph, and then analyzing and testing the components of the lost gas sample; Step 6: Turn off the heating box and remove the connecting device.

[0028] The beneficial effects of the present invention are as follows: the present invention can accurately restore the initial temperature and pressure environment of crude oil and gas in emission sources such as storage tanks by developing a gas sample homogeneous reduction technology, improve the accuracy of the test, and reduce the condensation and adhesion of some light hydrocarbons in the loss gas on the sampler wall during the process of sampling and transporting from the sampling point to the test instrument, so that the test results can reflect the true situation of the gas sample; The constant temperature transfer device adopts the design of heating channel inside the tube, hot gas inlet and outlet design, and bolt-type sealing design, which can heat the sampling equipment (glass syringe and chromatograph matching syringe), and is used to heat the gas sample collected on site and can inject the gas sample into the chromatograph at a constant temperature for chemical analysis; the external heating design of the tube can heat the gas sample bag. According to different gas sampling methods on site, three methods of uniform phase reduction loss gas detection are proposed to solve the problem of non-portability of detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall perspective structure of the thermostatic transfer device supporting the glass syringe in the present invention; Figure 2 This is a schematic diagram of the internal structure of the thermostatic transfer device supporting the glass syringe; Figure 3 It is a schematic diagram of the overall perspective structure of the thermostatic transfer device supporting the chromatograph in the present invention; Figure 4 It is a schematic diagram of the internal structure of the constant temperature transfer device supporting the chromatograph; Figure 5 It is a schematic diagram of the overall perspective structure of the constant temperature heating box; Figure 6 It is a schematic diagram of the side structure of the constant temperature heating box; Figure 7 It is a structural diagram of the hot air system; Figure 8 It is a partial structural diagram of the hot air system; Fig. 9 yes Figure 8 A partial enlarged view of point I in the middle; Fig.10 It is a partial perspective structural diagram of a constant temperature gas transmission pipeline; Fig.11 It is a schematic diagram of the cross-sectional structure of a constant temperature gas pipeline.

[0030] Among them, the accompanying drawings are marked as follows: A1, hot air inner channel; A2, hot air outer channel; A3, air inlet pipe; A4, air outlet pipe; A5, glass syringe; A6, heat transfer inner tube; A7, heat transfer outer tube; A8, insulation shell; A9, left cover; A10, right cover; A11, vent; A12, threaded connection; B1, hot air inner channel; B2, hot air outer channel; B3, air inlet pipe; B4, air outlet pipe; B5, chromatograph matching syringe; B6, heat transfer inner tube; B7, heat transfer outer tube; B8, insulation shell; B 9. Left cover; B10. Right cover; B11. Vent; B12. Threaded connection; C1. Hot air system; C2. Reducer and reducer; C3. Thick pipe section; C4. Thin pipe section; C5. Clamp; C6. Vertical thick pipe section; C7. Miniature ball valve; C8. Exhaust pipe; C9. Valve vent; C10. Mesh partition; C11. Door; C12. Control panel; C13. Heat dissipation hole; C14. Transparent glass window; C15. Extrusion rod; D1. Latex inner tube; D2. Spring winding structure; D3. Silicone outer tube. DETAILED DESCRIPTION

[0031] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0032] Embodiment 1: See also Figure 1 , Figure 2 and Figure 5-Figure 11 , a uniform phase reduction device for detecting lost gas in oil fields, characterized in that it comprises a constant temperature transfer device, a constant temperature gas transmission pipe and a constant temperature heating box; The constant temperature transfer device is wrapped on the outer wall of the sampling device and has a hot air channel between the device and the outer wall of the sampling device, and the channel has an air inlet pipe A3 and an air outlet pipe A4; The constant temperature heating box is used to heat the gas; The constant temperature air supply pipe is used to connect the exhaust pipe C8 of the constant temperature heating box with the air inlet pipe A3 of the channel.

[0033] The constant temperature transfer device comprises a heat transfer inner tube A6 and a heat transfer outer tube A7 which are arranged concentrically. A hot gas inner channel A1 is formed between the inner wall of the heat transfer inner tube A6 and the outer wall of the sampling device, and a hot gas outer channel A2 is formed between the inner wall of the heat transfer outer tube A7 and the outer wall of the heat transfer inner tube A6. The air inlet pipe A3 is connected to the hot gas inner channel A1, and the air outlet pipe A4 is connected to the hot gas outer channel A2. A vent hole A11 connecting the hot gas inner channel A1 and the hot gas outer channel A2 is provided on the side wall of the heat transfer inner tube A6; the air outlet pipe A4 and the air inlet pipe A3 are connected by a threaded connection A12, and continuous heating of the sampling equipment is achieved through the connection between the air inlet pipe A3 and the exhaust pipe C8.

[0034] The thermostatic transducer also includes a cover for blocking the hot gas inner channel A1 and the hot gas outer channel A2. One cover is provided with an opening for allowing the sampling head of the sampling device to pass through, and the other cover is provided with an operating hole matching the operating end of the sampling device. When the sampling device is a glass syringe A5, an opening corresponding to the sampling needle is eccentrically provided on the left cover A9 of the thermostatic transducer, and the operating end of the glass syringe A5 extends out of the right cover A10 of the thermostatic transducer.

[0035] The outer side of the heat transfer outer tube A7 is covered with a heat insulation outer shell A8.

[0036] The constant temperature heating box includes a sealed box body, a hot air system C1 arranged inside the box body to heat the air, a thick pipe section C3 connected to the air outlet of the hot air system, a thin pipe section C4 connected to the thick pipe section C3, and a plurality of exhaust pipes C8 connected to the air inlet pipe A3 are arranged on the thin pipe section C4, and valves are arranged on the exhaust pipes C8.

[0037] The exhaust pipe C8 is located at the bottom of the box, the hot air system C1, the thick pipe section C3 and the thin pipe section C4 are located at the bottom of the box, and a clamp C5 is provided at the bottom of the box to fix the hot air system C1, the thick pipe section C3 and the thin pipe section C4. The hot air system C1 adopts the existing technology and will not be described in detail here. As long as the air can be heated and then input into the constant temperature transfer device, the continuous entry of air can be achieved.

[0038] Two mesh partitions C10 with adjustable spacing are arranged on the upper inner wall of the box body. The thick pipe section C3 is connected with a vertical thick pipe section C6 with an opening toward the mesh partition C10. A valve is arranged on the vertical thick pipe section C6. The upper part of the box body is provided with a valve-type vent hole C9 which is connected with the internal space of the box body.

[0039] It also includes a squeezing rod C15 that passes through the valve-type vent hole C9 to squeeze the mesh partition C10. The two mesh partitions C10 cooperate with the squeezing rod C15 to have a squeezing function, which facilitates the removal and transfer of gas samples after heating the sampling bag placed between the two mesh partitions C10.

[0040] The box body adopts a double-layer box structure, with an inner box and an outer box set in the area where the mesh partition C10 is placed, and insulation materials are added in the middle to ensure uniform temperature inside the box. The valve on the exhaust pipe C8 can use a micro ball valve C7 to control the hot air flow. The pipeline of the hot air system C1 is connected to the thick pipe section C3 through a reducer C2.

[0041] The air inlet pipe A3 and the air outlet pipe A4 are located at the same end of the constant temperature transducer and at different sides, and the air vent A11 is located at the other end of the constant temperature transducer.

[0042] A heat dissipation hole C13 is provided at the lower part of the side wall of the box body.

[0043] The constant temperature gas transmission pipe has a double insulation layer, including a latex inner tube D1 and a silicone outer tube D3, and the interval between the latex inner tube D1 and the silicone outer tube D3 is in the shape of an airway.

[0044] A wire spring winding structure D2 is designed between the latex inner tube D1 and the silicone outer tube D3 to avoid direct contact between the two layers of the hose and ensure uniform heating.

[0045] The inner wall of the box body is provided with a plurality of slots for placing mesh partitions C10 at intervals, and a door C11 is provided at positions corresponding to the slots on the box body. A transparent glass window C14 is provided on the door C11, and a control panel C12 is provided on the box body.

[0046] The cover is fixed by threaded connection, and an annular boss inserted into the hot gas inner channel A1 and the hot gas outer channel A2 is provided on the cover.

[0047] When there is a gap between the heat-insulating shell A8 and the heat-transfer outer tube A7, the cover is provided with an annular boss inserted into the gap and the cover is arranged in the gap through a threaded connection, an internal thread is arranged on the heat-transfer outer tube A7, and an external thread is arranged on the cover. The cover adopts a dodecagonal design for easy disassembly and installation.

[0048] Specific usage: Usage plan 1: Use the 100 ml glass syringe A5 as a loss gas sampler.

[0049] Step 1. Prepare 100 ml glass syringe A5, silica gel block, and constant temperature gas pipe; Step 2: Place the glass syringe A5 in a constant temperature heating box and heat it to 80°C, take it out and repeatedly pump and push to empty it, and seal the needle with a silicone block for later use; Step 3, take out the silica gel block and sample the lost gas on site. If there are multiple sampling points, prepare multiple sampling glass syringes A5 and process according to the above steps; Step 4: seal the glass syringe A5 with a silica gel block and send it to the on-site laboratory; Step 5, install the glass syringe A5 into the matching constant temperature transfer device; Step 6: Prepare the constant temperature heating box, close the valve of the valve-type vent C9 on the top of the box, and connect the exhaust pipe C8 on the side of the constant temperature heating box and the intake pipe A3 on the constant temperature transfer device with a constant temperature gas pipe; Step 7, turn on the heating switch of the heating box, and the hot air passes through the hot air system C1, the thick pipe section C3, the thin pipe section C4 and the exhaust pipe C8, and enters the inner hot air channel A1, the vent A11 and the hot air outer channel A2 through the air inlet pipe A3, and is finally discharged through the air outlet pipe A4; When the temperature stabilizes at 80°C, push the glass syringe A5 gas sample in the constant temperature transfer device into the on-site laboratory chromatograph to analyze and test the components of the lost gas sample; Step 8: Turn off the heating box and remove the connecting device.

[0050] Usage option 2: Use gas collection bags for on-site use.

[0051] Step 1: Prepare the gas sample collection bag, explosion-proof atmospheric sampler, and constant temperature gas pipeline; Step 2: Use a constant temperature gas transmission pipe with an explosion-proof atmospheric sampler to sample the on-site loss gas and deliver the gas bag to the laboratory; Step 3, place the gas sample bag between the two layers of mesh partitions C10 of the constant temperature heating box, connect the gas sample bag outlet and the chromatograph inlet of the on-site laboratory with a constant temperature gas pipe, close the box door C11, turn on the heating switch of the heating box, and the hot air enters the box through the hot air system C1, the thick pipe section C3 and the vertical thick pipe section C6 to heat the gas sample bag, and is discharged from the valve vent C9 after the heating temperature stabilizes to 80°C; Step 4, press down the extrusion rod C15 on the heating box to squeeze the gas sample in the gas sample bag into the chromatograph, and then analyze and test the components of the lost gas sample; Step 5: Turn off the heating box and remove the connecting device.

[0052] Embodiment 2: An oilfield loss gas detection and uniform phase reduction device, characterized in that it comprises a constant temperature transfer device, a constant temperature gas transmission pipe and a constant temperature heating box; The constant temperature transfer device is wrapped around the outer wall of the sampling device and has a hot air channel between the device and the outer wall of the sampling device, and the channel has an air inlet pipe B3 and an air outlet pipe B4; The constant temperature heating box is used to heat the gas; The constant temperature air supply pipe is used to connect the exhaust pipe C8 of the constant temperature heating box with the air inlet pipe B3 of the channel.

[0053] The constant temperature transfer device includes a heat transfer inner tube B6 and a heat transfer outer tube B7 which are arranged concentrically. A hot gas inner channel B1 is formed between the inner wall of the heat transfer inner tube B6 and the outer wall of the sampling device, and a hot gas outer channel B2 is formed between the inner wall of the heat transfer outer tube B7 and the outer wall of the heat transfer inner tube B6. The air inlet pipe B3 is connected to the hot gas inner channel B1, the air outlet pipe B4 is connected to the hot gas outer channel B2, and a vent hole B11 connecting the hot gas inner channel B1 and the hot gas outer channel B2 is provided on the side wall of the heat transfer inner tube B6; the air outlet pipe B4 and the air inlet pipe B3 are connected by a threaded connection B12, and the continuous heating of the sampling equipment is achieved through the connection between the air inlet pipe B3 and the exhaust pipe C8.

[0054] The thermostatic transducer also includes a cover for blocking the hot gas inner channel B1 and the hot gas outer channel B2. One cover is provided with an opening for allowing the sampling head of the sampling device to pass through, and the other cover is provided with an operating hole matching the operating end of the sampling device. When the sampling device is a syringe B5 for the chromatograph, an opening corresponding to the needle is eccentrically provided on the left cover B9 of the thermostatic transducer, and the operating end of the syringe B5 for the chromatograph extends out of the right cover B10 of the thermostatic transducer.

[0055] The outer side of the heat transfer outer tube B7 is covered with a heat insulation outer shell B8.

[0056] The constant temperature heating box includes a sealed box body, a hot air system C1 arranged inside the box body to heat the air, a thick pipe section C3 connected to the air outlet of the hot air system, a thin pipe section C4 connected to the thick pipe section C3, and a plurality of exhaust pipes C8 connected to the air inlet pipe B3 are arranged on the thin pipe section C4, and a valve is arranged on the exhaust pipe C8. The valve on the exhaust pipe C8 can be a micro ball valve C7 to control the hot air flow. The pipeline of the hot air system C1 is connected to the thick pipe section C3 through a reducer C2.

[0057] The exhaust pipe C8 is located at the bottom of the box, the hot air system C1, the thick pipe section C3 and the thin pipe section C4 are located at the bottom of the box, and a clamp C5 is provided at the bottom of the box to fix the hot air system C1, the thick pipe section C3 and the thin pipe section C4. The hot air system C1 adopts the existing technology and will not be described in detail here. As long as the air can be heated and then input into the constant temperature transfer device, the continuous entry of air can be achieved.

[0058] Two mesh partitions C10 with adjustable spacing are arranged on the upper inner wall of the box body, and the thick pipe section C3 is connected with a vertical thick pipe section C6 with an opening facing the mesh partition C10; a valve is arranged on the vertical thick pipe section C6; the box body adopts a double-layer box structure, and an inner box and an outer box are arranged in the area where the mesh partition C10 is placed, and thermal insulation material is added in the middle to ensure uniform temperature inside the box.

[0059] The upper part of the box body is provided with a valve-type vent hole C9 which is connected with the internal space of the box body.

[0060] It also includes a squeezing rod C15 that passes through the valve-type vent hole C9 to squeeze the mesh partition C10. The two mesh partitions C10 cooperate with the squeezing rod C15 to have a squeezing function, which facilitates the removal and transfer of gas samples after heating the sampling bag placed between the two mesh partitions C10.

[0061] The air inlet pipe B3 and the air outlet pipe B4 are located at the same end of the constant temperature transducer and at different sides, and the air vent B11 is located at the other end of the constant temperature transducer.

[0062] A heat dissipation hole C13 is provided at the lower part of the side wall of the box body.

[0063] The constant temperature gas transmission pipe has a double insulation layer, including a latex inner tube D1 and a silicone outer tube D3, and the interval between the latex inner tube D1 and the silicone outer tube D3 is in the shape of an airway.

[0064] A steel wire spring winding structure D2 is designed between the latex inner tube D1 and the silicone outer tube D3 to avoid direct contact between the two layers of rubber tubes and ensure uniform heating.

[0065] The inner wall of the box body is provided with a plurality of slots for placing mesh partitions C10 at intervals, and a door C11 is provided at positions corresponding to the slots on the box body. A transparent glass window C14 is provided on the door C11, and a control panel C12 is provided on the box body.

[0066] The cover is fixed by threaded connection, and an annular boss inserted into the hot gas inner channel B1 and the hot gas outer channel B2 is provided on the cover.

[0067] When there is a gap between the heat-insulating shell B8 and the heat-transfer outer tube B7, the cover is provided with an annular boss inserted into the gap and the cover is arranged in the gap through a threaded connection, an internal thread is arranged on the heat-transfer outer tube B7, and an external thread is arranged on the cover. The cover adopts a dodecagonal design for easy disassembly and installation.

[0068] Specific usage: Usage plan 1: Use gas collection bags for on-site use.

[0069] Step 1: Prepare the gas sample collection bag, explosion-proof atmospheric sampler, and constant temperature gas pipeline; Step 2: Use a constant temperature gas transmission pipe with an explosion-proof atmospheric sampler to sample the on-site loss gas and deliver the gas bag to the laboratory; Step 3, place the gas sample bag between the two layers of mesh partitions C10 of the constant temperature heating box, connect the gas sample bag outlet and the chromatograph inlet of the on-site laboratory with a constant temperature gas pipe, close the box door C11, turn on the heating switch of the heating box, and the hot air enters the box through the hot air system C1, the thick pipe section C3 and the vertical thick pipe section C6 to heat the gas sample bag, and is discharged from the valve vent C9 after the heating temperature stabilizes to 80°C; Step 4, press down the extrusion rod C15 on the heating box to squeeze the gas sample in the gas sample bag into the chromatograph, and then analyze and test the components of the lost gas sample; Step 5: Turn off the heating box and remove the connecting device Usage plan 2: Use the air bag in conjunction with the transfer device.

[0070] Step 1: Prepare the gas sample collection bag, explosion-proof atmospheric sampler, and constant temperature gas pipeline; Step 2: Use a constant temperature gas transmission pipe with an explosion-proof atmospheric sampler to sample the on-site loss gas, and send the gas sample bag to the laboratory; Step 3: Place the gas sample bag in a heating box, turn on the heating switch of the heating box, and stabilize the temperature to 80°C; Step 4, use the thermostatic transfer device supporting the chromatograph, and use heat-insulating gloves to directly extract a suitable volume of gas sample from the gas sample bag; at this time, the thermostatic transfer device can also be connected to the heating box, so that the hot air passes through the hot air system C1, the thick tube section C3, the thin tube section C4 and the exhaust pipe C8, and enters the inner hot air channel B1, the vent B11 and the hot air outer channel B2 through the air inlet pipe B3, and finally is discharged through the air outlet pipe B4, so that the syringe B5 supporting the chromatograph can be heated; Step 5, injecting the gas sample in the thermostatic transfer device supporting the chromatograph into the chromatograph, and then analyzing and testing the components of the lost gas sample; Step 6: Turn off the heating box and remove the connecting device.

[0071] Embodiment three: See also Figure 1-Figure 2 A constant temperature transfer device comprises a heat transfer inner tube A6 and a heat transfer outer tube A7 which are arranged concentrically, an inner hot gas passage A1 is formed between the inner wall of the heat transfer inner tube A6 and the outer wall of the sampling device, and an outer hot gas passage A2 is formed between the inner wall of the heat transfer outer tube A7 and the outer wall of the heat transfer inner tube A6; The air inlet pipe A3 is connected to the hot gas inner channel A1, and the air outlet pipe A4 is connected to the hot gas outer channel A2. A vent hole A11 connecting the hot gas inner channel A1 and the hot gas outer channel A2 is provided on the side wall of the heat transfer inner tube A6; the air outlet pipe A4 and the air inlet pipe A3 are connected by a threaded connection A12, and continuous heating of the sampling equipment is achieved through the connection between the air inlet pipe A3 and the exhaust pipe C8.

[0072] The thermostatic transducer also includes a cover for blocking the hot gas inner channel A1 and the hot gas outer channel A2. One cover is provided with an opening for allowing the sampling head of the sampling device to pass through, and the other cover is provided with an operating hole matching the operating end of the sampling device. When the sampling device is a glass syringe A5, an opening corresponding to the sampling needle is eccentrically provided on the left cover A9 of the thermostatic transducer, and the operating end of the glass syringe A5 extends out of the right cover A10 of the thermostatic transducer.

[0073] The outer side of the heat transfer outer tube A7 is covered with a heat insulation outer shell A8.

[0074] The air inlet pipe A3 and the air outlet pipe A4 are located at the same end of the constant temperature transducer and at different sides, and the air vent A11 is located at the other end of the constant temperature transducer.

[0075] The cover is fixed by threaded connection, and an annular boss inserted into the hot gas inner channel A1 and the hot gas outer channel A2 is provided on the cover.

[0076] When there is a gap between the heat-insulating shell A8 and the heat-transfer outer tube A7, the cover is provided with an annular boss inserted into the gap and the cover is arranged in the gap through a threaded connection, an internal thread is arranged on the heat-transfer outer tube A7, and an external thread is arranged on the cover. The cover adopts a dodecagonal design for easy disassembly and installation.

[0077] When in use, the heat transfer inner tube A6 is wrapped around the outside of the sampling device, and the air inlet pipe A3 is connected to constant temperature hot air, which can be used to heat the sample in the sampling device, and then the reduced gas sample is transported to the detection device through the constant temperature transfer device.

[0078] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A homogeneous phase reduction device for detecting oilfield loss gas, characterized in that: It includes a constant temperature transfer device, a constant temperature gas transmission pipe and a constant temperature heating box; The constant temperature transfer device is wrapped on the outer wall of the sampling device and has a hot air channel between the device and the outer wall of the sampling device, wherein the channel has an air inlet pipe and an air outlet pipe; The constant temperature heating box is used to heat the gas; The constant temperature air delivery pipe is used to connect the exhaust pipe of the constant temperature heating box with the air inlet pipe of the channel.

2. The oilfield loss gas detection homogeneous phase reduction device according to claim 1 is characterized in that: The constant temperature transfer device comprises a heat transfer inner tube and a heat transfer outer tube which are arranged concentrically, an inner hot gas channel is formed between the inner wall of the heat transfer inner tube and the outer wall of the sampling device, and an outer hot gas channel is formed between the inner wall of the heat transfer outer tube and the outer wall of the heat transfer inner tube; The air inlet pipe is connected to the hot gas inner channel, the air outlet pipe is connected to the hot gas outer channel, and a vent hole connecting the hot gas inner channel and the hot gas outer channel is provided on the side wall of the heat transfer inner tube; The constant temperature transfer device also includes a cover for sealing the hot gas inner channel and the hot gas outer channel.

3. The oilfield loss gas detection homogeneous phase reduction device according to claim 2 is characterized in that: The outer side of the heat transfer outer tube is covered with a heat insulation shell.

4. The oilfield loss gas detection homogeneous phase reduction device according to claim 1 is characterized in that: The constant temperature heating box includes a sealed box body, a hot air system arranged inside the box body to heat the air, a thick pipe section connected to the air outlet of the hot air system, and a thin pipe section connected to the thick pipe section, and the thin pipe section is provided with a plurality of exhaust pipes connected to the air inlet pipe, and the exhaust pipes are provided with valves.

5. The oilfield loss gas detection homogeneous phase reduction device according to claim 4 is characterized in that: Two mesh partitions with adjustable spacing are arranged on the upper inner wall of the box body, and the thick pipe section is connected with a vertical thick pipe section with an opening facing the mesh partition; a valve is arranged on the vertical thick pipe section; The upper part of the box body is provided with a valve-type vent hole which is communicated with the inner space of the box body.

6. The oilfield loss gas detection homogeneous phase reduction device according to claim 2 is characterized in that: The constant temperature transducer, the air inlet pipe and the air outlet pipe are located at the same end of the constant temperature transducer and at different sides, and the vent hole is located at the other end of the constant temperature transducer.

7. The homogeneous phase reduction device for detecting oilfield lost gas according to claim 4 is characterized in that: The lower part of the side wall of the box body is provided with heat dissipation holes.

8. The oilfield loss gas detection homogeneous phase reduction device according to claim 1 is characterized in that: The constant temperature gas transmission pipe has a double-layer insulation layer, including a latex inner tube and a silicone outer tube, and the interval between the latex inner tube and the silicone outer tube is in the shape of an airway.

9. The oilfield loss gas detection homogeneous phase reduction device according to claim 8 is characterized in that: A steel wire spring winding structure is designed between the latex inner tube and the silicone outer tube.

10. A constant temperature transducer, characterized in that: The constant temperature transfer device comprises a heat transfer inner tube and a heat transfer outer tube which are arranged concentrically, an inner hot gas channel is formed between the inner wall of the heat transfer inner tube and the outer wall of the sampling device, and an outer hot gas channel is formed between the inner wall of the heat transfer outer tube and the outer wall of the heat transfer inner tube; The air inlet pipe is connected to the hot gas inner channel, the air outlet pipe is connected to the hot gas outer channel, and a vent hole connecting the hot gas inner channel and the hot gas outer channel is provided on the side wall of the heat transfer inner tube; The constant temperature transfer device also includes a cover for sealing the hot gas inner channel and the hot gas outer channel.

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