Returning and deflating assembly in casing gas well

Abstract

The utility model discloses a casing gas in-well back-conveying deflation assembly, which relates to the technical field of deflation valves and comprises a one-way valve and a connecting pipe, the one-way valve is arranged in the middle of the connecting pipe, two ends of the connecting pipe are respectively communicated with a casing and an oil well gas conveying port in a sealed manner, and the one-way valve can enable gas in the casing to flow to the oil well gas conveying port. Gas in a casing pipe is conveyed into an oil well, the content of the gas in the pipe is reduced, the oil liquid level is improved, the lifting pressure of an oil well pump is reduced, the yield is improved, meanwhile, invalid work of a system is reduced, and electric energy is saved by 3%-10%; the probability of occurrence of production accidents such as airlock is reduced, and potential safety hazards caused by environmental pollution and combustible gas emission are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas exhaust valve, in particular to a casing gas well inner back -feed gas exhaust subassembly. BACKGROUND

[0002] In the oilfield production process, casing gas often occurs in the oil casing annular space, and excessive casing gas can reduce the oil level, affect the submergence of the oil pump, and lead to reduced production; the pressure in the annular space rises, increasing the content of dissolved gas and free gas in the oil, and when the oil enters the oil pump, excessive gas is precipitated, which can easily cause production accidents such as "gas lock"; the proportion of gas in the oil increases, reducing production and affecting production efficiency.

[0003] In actual production, one method of processing gas in the casing is to directly discharge it into the atmosphere, but the gas in the casing contains a large amount of methane, ethane, propane, and a small amount of butane, hexane, etc. These gases are not only important chemical raw materials and industrial fuels, but also cause serious environmental pollution if directly discharged into the atmosphere, and the gas is flammable, which poses a certain safety hazard. SUMMARY

[0004] The utility model discloses a casing gas well inner back -feed gas exhaust subassembly, which solves the problems of the prior art, and can transport the gas in the casing to the oil well, reduce the gas content in the pipe, improve the oil level, and reduce the lifting pressure of the oil pump and the probability of occurrence of production accidents such as "gas lock".

[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme:

[0006] The utility model provides a casing gas well inner back -feed gas exhaust subassembly, which comprises a one-way valve and a connecting pipe, the middle part of the connecting pipe is provided with the one-way valve, the two ends of the connecting pipe are respectively sealed in communication with the casing and the gas inlet of the oil well, and the one-way valve can make the gas in the casing flow to the gas inlet of the oil well.

[0007] Preferably, the connecting pipe comprises straight pipes and metal hoses, the straight pipes are provided with two and are respectively sealed in communication with the casing and the gas inlet of the oil well, and one end of the metal hose is connected with one straight pipe through the one-way valve, and the other end is communicated with the other straight pipe.

[0008] Preferably, the casing and the gas inlet of the oil well are respectively communicated with the straight pipe through a thread joint.

[0009] Preferably, the straight pipe is a double public short section.

[0010] Preferably, the double public short section is at least 10cm long.

[0011] Preferably, a raw rubber tape is arranged around the connection between the double-male short section and the plug joint.

[0012] Preferably, a tee joint is arranged between one end of the metal hose and another straight pipe, and a pressure gauge is connected to the tee joint.

[0013] Preferably, the straight pipe and the tee joint are made of alloy steel, carbon steel or stainless steel.

[0014] Preferably, one end of the metal hose is threadedly connected to the tee joint, and the other end is threadedly connected to the one-way valve.

[0015] Preferably, a raw rubber tape is arranged around the connection between the two ends of the metal hose.

[0016] The utility model discloses relative to prior art has obtained following technical effect:

[0017] The utility model discloses the gas in bushing is transported to oil well, has reduced the gas content in pipe, has improved oil liquid surface, has also reduced the lifting pressure of pumping unit, has reduced system invalid work while improving production, has saved electric energy 3-10%, has reduced the probability of occurrence of " gas lock " and other production accidents, has avoided environmental pollution and the security hidden danger that combustible gas outward discharge has brought. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment, obviously, the drawing in the following description only is some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0019] Fig. 1 For the structure diagram of the gas return and release assembly in the casing gas well in the embodiment of the utility model;

[0020] Fig. 2 For the assembly diagram of the gas return and release assembly in the casing gas well in the embodiment of the utility model;

[0021] In the drawing: 1-gas return and release assembly in casing gas well, 2-double-male short section, 3-one-way valve, 4-metal hose, 5-plug joint, 6-tee joint, 7-pressure gauge. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0023] The present application provides a casing gas well in-tube back-feeding and gas releasing assembly, so as to solve the problems in the prior art, to transport the gas in the casing to the oil well, to reduce the gas content in the tube, to improve the oil surface, and to reduce the lifting pressure of the oil pump and the occurrence probability of production accidents such as "gas lock".

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, comprehensible and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0025] As shown in the drawings, Figs. 1-2 In the present embodiment, a casing gas well in-tube back-feeding and gas releasing assembly 1 is provided, which comprises a one-way valve 3 and a connecting pipe. The middle part of the connecting pipe is provided with the one-way valve 3. The two ends of the connecting pipe are in sealing communication with the casing and the gas inlet of the oil well respectively. The one-way valve 3 can make the gas in the casing flow to the gas inlet of the oil well. In the present embodiment, the casing and the gas inlet of the oil well are connected through the one-way valve 3, so that the gas in the casing is transported to the well under the action of the pressure difference, and the gas content in the casing is reduced. At the same time, the one-way valve 3 can also prevent the gas in the well from flowing back.

[0026] As an optional solution, in the present embodiment, the connecting pipe comprises straight pipes and a metal hose 4. Two straight pipes are provided and are in sealing communication with the casing and the gas inlet of the oil well respectively. One end of the metal hose 4 is connected to one of the straight pipes through the one-way valve 3, and the other end is in communication with the other straight pipe. The metal hose 4 can make the on-site installation flexible.

[0027] As an optional solution, in the present embodiment, the casing and the gas inlet of the oil well are in communication with the straight pipes through a plug joint 5 respectively.

[0028] As an optional solution, in the present embodiment, the straight pipe is a double-public short section 2, which is convenient for realizing bidirectional threaded connection.

[0029] As an optional solution, in the present embodiment, the double-public short section 2 is at least 10 cm long, which guarantees sufficient connection length of the one-way valve 3 and the tee joint 6.

[0030] As an optional solution, in the present embodiment, a rubber band is wound between the double-public short section 2 and the plug joint 5, which guarantees that the sealing does not leak.

[0031] As an alternative, one end of the metal hose 4 and the other straight pipe are provided with a tee joint 6 in the embodiment, and a pressure gauge 7 is connected to the tee joint 6, which is used to monitor the pressure in the pipe in real time, so as to determine the pump efficiency.

[0032] As an alternative, the straight pipe and the tee joint 6 are made of alloy steel, carbon steel or stainless steel in the embodiment, and can also be made of other strong and durable materials.

[0033] As an alternative, one end of the metal hose 4 is threadedly connected to the tee joint, and the other end is threadedly connected to the one-way valve 3 in the embodiment, and the one-way valve 3 can make the gas in the metal hose 4 flow to the double-male nipple 2.

[0034] As an alternative, the two ends of the metal hose 4 are wrapped with raw rubber belts in the embodiment, so as to ensure that the seal does not leak.

[0035] In the installation and use process of the embodiment, first, the production valve and the casing valve are closed, one end is sequentially connected to the pipe plug joint 5, the double-male nipple 2, the one-way valve 3, the metal hose 4, the tee joint 6, and the upper end of the tee joint 6 is connected to the pressure gauge 7, and the other end is connected to the double-male nipple 2, the nipple is connected to the pipe plug joint 5, and the one-way valve 3 can make the gas in the casing flow to the gas outlet of the oil well and can transport the gas in the casing to the oil well. When connecting the threads, raw rubber belts are wound and tightened to ensure that the seal does not leak, then the production valve is opened, it is checked whether there is leakage, then the casing valve is opened, it is checked again whether there is leakage, if there is no abnormality, the pumping unit is started for normal production, and the production process is checked regularly.

[0036] The embodiment can transport the gas in the casing to the oil well, reduce the gas content in the pipe, improve the oil level, and also reduce the lifting pressure of the oil pump, improve the yield, reduce the invalid work of the system, save 3-10% of electric energy, reduce the probability of production accidents such as "gas lock", and avoid environmental pollution and safety hazards caused by the external discharge of flammable gas.

[0037] The principle and implementation mode of the specific examples in the utility model are described, and the above embodiment is only used to help understand the method and core idea of the utility model; meanwhile, for those skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the utility model.

Claims

1. A casing gas well internal gas recycling gas release assembly characterized by: The application relates to a one-way valve and a connecting pipe, wherein the middle part of the connecting pipe is provided with the one-way valve, the two ends of the connecting pipe are respectively in sealed communication with a sleeve and a gas outlet of an oil well, and the one-way valve can make gas in the sleeve flow to the gas outlet of the oil well.

2. The cased gas well internal gas recompression vent assembly of claim 1, wherein: The connecting pipe comprises straight pipes and metal hoses, two straight pipes are arranged and are respectively in sealed communication with the sleeve and the gas outlet of the oil well, one end of the metal hose is connected with one straight pipe through the one-way valve, and the other end of the metal hose is in communication with the other straight pipe.

3. The cased gas well internal gas recompression vent assembly of claim 2, wherein: The sleeve and the gas outlet of the oil well are respectively in communication with the straight pipes through a threadless joint.

4. The cased gas well internal gas recompression vent assembly of claim 3, wherein: The straight pipe is a double-male nipple.

5. The cased gas well internal gas recompression vent assembly of claim 4, wherein: The double-male nipple is at least 10 cm long.

6. The cased gas well internal gas recompression bleedoff assembly of claim 4 wherein: Rubber bands are arranged around the double-male nipple and the threadless joint.

7. The cased gas well internal gas recompression vent assembly of claim 2, wherein: A tee joint is arranged between one end of the metal hose and the other straight pipe, and a pressure gauge is connected to the tee joint.

8. The cased gas well internal gas recompression vent assembly of claim 7, wherein: The straight pipe and the tee joint are made of alloy steel, carbon steel or stainless steel.

9. The cased gas well internal gas recompression gas release assembly of claim 7, wherein: One end of the metal hose is threadedly connected with the tee joint, and the other end of the metal hose is threadedly connected with the one-way valve.

10. The cased gas well internal gas recompression gas release assembly of claim 9, wherein: Rubber bands are arranged around the two end connecting portions of the metal hose.

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