Wellhead device of hollow rod hot flushing well

Abstract

The utility model relates to the technical field of oil field auxiliary use equipment, in particular to a hollow rod thermal well washing wellhead device which comprises a mounting plate, the upper end face of the mounting plate is fixedly connected with a heating box, the lower end face of the mounting plate is fixedly connected with a fixing frame, and the lower end face of the fixing frame is fixedly connected with a sleeve through a pipe hoop. A high-temperature-resistant oil pump is arranged on the left side of the heating box, heat conduction oil flows through a circulating pipe, is guided out from one side of the heating box, passes through a sleeve and then returns to the heating box, so that thick oil or paraffin in an oil pipe on the pump can be heated and dissolved, the heat efficiency is high, and compared with a traditional cleaning mode, well washing water cannot enter a stratum or pollute an oil layer; well washing water is not pumped out by oil pumping sand, oil well production is not affected, high-benefit hot well washing can prolong the oil well production period, heating rods in the heating box can continuously heat conduction oil, heat recycling is achieved, the working efficiency is improved, and compared with water, the heating effect of the conduction oil is better.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield auxiliary equipment, in particular to a hollow rod hot well washing wellhead device. Background Art

[0002] Heavy oil wells and wax-coated wells in oil fields require frequent hot water washing to ensure normal production. The current well washing method generally involves pumping hot water into the casing and returning it from the oil pipe, causing the heavy oil or paraffin in the oil pipe to dissolve due to heat. In this way, the well washing water must enter the formation, which can easily cause oil layer contamination for wells with low formation pressure. In addition, the well washing water needs to be pumped out, affecting the oil production of the oil well. This well washing method also has the problem of low thermal efficiency. The heat of the well washing water is absorbed by the wellbore, and less heat is used to heat the crude oil.

[0003] A Chinese patent (patent number: CN203161177U, disclosing a hollow rod hot wellhead device) allows hot water to be mixed into the tubing through the hollow rod and then returned from the pump tubing. This device has high thermal efficiency, prevents the water from entering the formation and contaminating the oil layer, and does not extract the water from the oil sand, which does not affect oil well production. Highly efficient hot well washing can extend the production cycle of oil wells, thus providing significant economic benefits. The operator simply holds the handle, aligns the quick-release connector with the quick-release connector, and then starts the pump to wash the well. Therefore, this device is convenient and practical.

[0004] However, when the above device is in use, hot water is mixed into the oil pipe from the hollow rod in the oil pipe and returned from the oil pipe on the pump, causing the thick oil or paraffin in the oil pipe on the pump to dissolve due to the heat. The heat of the hot water is lost after heat exchange, and hot water needs to be continuously added to ensure that the thick oil or paraffin in the oil pipe on the pump is fully heated. The device cannot be recycled, which affects the overall work efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a hollow rod hot washing wellhead device, which has the characteristics of high thermal efficiency, no pollution to the oil layer, no influence on oil well production, and realizes heat recycling, improves work efficiency, and has better heating effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hollow rod hot washing well wellhead device, comprising a mounting plate, the upper end face of the mounting plate is fixedly connected to a heating box, the lower end face of the mounting plate is fixedly connected to a fixing frame, the lower end face of the fixing frame is fixedly connected to a casing through a pipe clamp, a high-temperature resistant oil pump is provided on the left side of the heating box, one end of the high-temperature resistant oil pump is connected to the interior of the heating box and the other end is connected to a circulation pipe, the outer wall of the circulation pipe is folded in half and covered over the interior of the casing, and the other end of the circulation pipe is connected to the interior of the heating box.

[0007] In order to heat the heat transfer oil, as a preferred hollow rod hot wash wellhead device of the present invention, a heating rod is provided at the inner bottom end of the heating box.

[0008] In order to facilitate connection with an external pumping unit, as a preferred hollow rod hot wash wellhead device of the present invention, two suspension ropes are fixedly connected to the upper end surface of the mounting plate.

[0009] In order to facilitate access to the oil pipe on the pump, as a preferred hollow rod hot wash well wellhead device of the utility model, the circulation pipe and the casing are both soft pipes with good thermal conductivity.

[0010] In order to play a protective role, as a preferred hollow rod hot wash wellhead device of the present invention, a protective cover is provided on the outside of the heating rod, and a plurality of through holes are opened on the outer wall of the protective cover.

[0011] In order to facilitate the injection of heat transfer oil into the heating box, as a preferred hollow rod hot wash wellhead device of the present invention, the upper end surface of the heating box is fixedly connected with an oil filling port.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] Inject heat transfer oil into the heating box through the oil filling port, heat the heat transfer oil when the heating rod is started, guide the casing into the oil pipe on the pump, start the high-temperature resistant oil pump, and the heat transfer oil flows through the circulation pipe, is discharged from one side of the heating box, and returns to the heating box after passing through the casing, so that the thick oil or paraffin in the oil pipe on the pump can be dissolved by heat, with high thermal efficiency. Compared with traditional cleaning methods, well washing water will not enter the formation and will not pollute the oil layer. Well washing water is not extracted by pumping oil sand and will not affect oil well production. High-efficiency hot well washing can extend the production cycle of oil wells, and the heating rod inside the heating box can continuously heat the heat transfer oil, realize heat recycling, and improve work efficiency. Thermal oil has better heating effect than water. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall main structural diagram of the utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the casing of the utility model;

[0016] Figure 3 This is the external structure diagram of the protective cover of this utility model.

[0017] In the figure: 1. Mounting plate; 2. Heating box; 3. High-temperature resistant oil pump; 4. Pipe clamp; 5. Casing; 6. Circulation pipe; 7. Fixing bracket; 8. Heating rod; 9. Suspension rope; 10. Protective cover; 11. Through hole; 12. Oil filling port. DETAILED DESCRIPTION

[0018] See also Figures 1 to 3 A hollow rod hot washing wellhead device includes a mounting plate 1, the upper end surface of the mounting plate 1 is fixedly connected to a heating box 2, the lower end surface of the mounting plate 1 is fixedly connected to a fixing bracket 7, the lower end surface of the fixing bracket 7 is fixedly connected to a casing 5 through a pipe clamp 4, and a high-temperature resistant oil pump 3 is provided on the left side of the heating box 2. One end of the high-temperature resistant oil pump 3 is connected to the interior of the heating box 2 and the other end is connected to a circulation pipe 6. The outer wall of the circulation pipe 6 is folded in half and covered with the interior of the casing 5. The other end of the circulation pipe 6 is connected to the interior of the heating box 2.

[0019] In this embodiment: heat-conducting oil is injected into the heating box 2 through the oil filling port 12, and the heat-conducting oil is heated when the heating rod 8 is started. The casing 5 is introduced into the oil pipe on the pump, and the high-temperature resistant oil pump 3 is started. The heat-conducting oil flows through the circulation pipe 6, is discharged from one side of the heating box 2, and returns to the heating box 2 after passing through the casing 5, so that the thick oil or paraffin in the oil pipe on the pump can be dissolved by heat, and the thermal efficiency is high. Compared with the traditional cleaning method, the well washing water will not enter the formation and will not pollute the oil layer. The well washing water is not extracted by the oil sand and will not affect the production of the oil well. The high-efficiency hot well washing can extend the production cycle of the oil well, and the heating rod 8 inside the heating box 2 can continuously heat the heat-conducting oil, realize heat recycling, and improve work efficiency. The heat-conducting oil has a better heating effect than water.

[0020] As a technical optimization solution of the present invention, a heating rod 8 is provided at the inner bottom end of the heating box 2 .

[0021] In this embodiment, a heating rod 8 is provided at the bottom of the heating box 2 to heat the heat transfer oil.

[0022] As a technical optimization solution of the present invention, two suspension ropes 9 are fixedly connected to the upper end surface of the mounting plate 1 .

[0023] In this embodiment, two suspension ropes 9 are fixedly connected to the upper end surface of the mounting plate 1 to facilitate connection with an external oil pumping unit.

[0024] As a technical optimization solution of the present invention, the circulation pipe 6 and the casing 5 are both soft pipes with good thermal conductivity.

[0025] In this embodiment, the circulation pipe 6 and the sleeve 5 are both soft pipes with good thermal conductivity, so as to facilitate access to the interior of the oil pipe on the pump.

[0026] As a technical optimization solution of the present invention, a protective cover 10 is provided on the outside of the heating rod 8 , and a plurality of through holes 11 are opened on the outer wall of the protective cover 10 .

[0027] In this embodiment, the protective cover 10 protects the heating rod 8, and the through hole 11 allows the heat transfer oil to flow.

[0028] As a technical optimization solution of the present invention, an oil filling port 12 is fixedly connected to the upper end surface of the heating box 2 .

[0029] In this embodiment, an oil filling port 12 is fixedly connected to the upper end surface of the heating box 2 to facilitate the injection of heat transfer oil into the heating box 2 .

[0030] Working principle: heat transfer oil is injected into the heating box 2 through the oil filling port 12, and the heat transfer oil is heated when the heating rod 8 is started. The casing 5 is introduced into the oil pipe on the pump, and the high-temperature resistant oil pump 3 is started. The heat transfer oil flows through the circulation pipe 6 and is discharged from one side of the heating box 2. After passing through the casing 5, it returns to the heating box 2, so that the thick oil or paraffin in the oil pipe on the pump can be dissolved by heat, and the thermal efficiency is high. Compared with traditional cleaning methods, the well washing water will not enter the formation and will not pollute the oil layer. The well washing water is not extracted by pumping oil sand and will not affect the production of the oil well. The high-efficiency hot well washing can extend the production cycle of the oil well, and the heating rod 8 inside the heating box 2 can continuously heat the heat transfer oil, realize heat recycling, and improve work efficiency. The heat transfer oil has a better heating effect than water.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hollow rod hot-wash wellhead device, comprising a mounting plate (1), characterized in that: The upper end surface of the mounting plate (1) is fixedly connected to a heating box (2), the lower end surface of the mounting plate (1) is fixedly connected to a fixing frame (7), the lower end surface of the fixing frame (7) is fixedly connected to a sleeve (5) via a pipe clamp (4), a high-temperature resistant oil pump (3) is provided on the left side of the heating box (2), one end of the high-temperature resistant oil pump (3) is connected to the interior of the heating box (2) and the other end is connected to a circulation pipe (6), the outer wall of the circulation pipe (6) is folded in half and covered on the interior of the sleeve (5), and the other end of the circulation pipe (6) is connected to the interior of the heating box (2).

2. A hollow rod hot-wash wellhead device according to claim 1, characterized in that: A heating rod (8) is provided at the inner bottom end of the heating box (2).

3. The hollow rod hot-wash wellhead device according to claim 1, characterized in that: Two suspension ropes (9) are fixedly connected to the upper end surface of the mounting plate (1).

4. The hollow rod hot-wash wellhead device according to claim 1, characterized in that: The circulation pipe (6) and the sleeve (5) are both soft pipes with good thermal conductivity.

5. The hollow rod hot-wash wellhead device according to claim 2, characterized in that: A protective cover (10) is provided on the outside of the heating rod (8), and a plurality of through holes (11) are provided on the outer wall of the protective cover (10).

6. The hollow rod hot-wash wellhead device according to claim 1, characterized in that: An oil filling port (12) is fixedly connected to the upper end surface of the heating box (2).

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