Viscosity reducing and oil increasing device

Abstract

The invention discloses a viscosity reducing and oil increasing device, and relates to the technical field of oil exploitation, the viscosity reducing and oil increasing device comprises a coupling, the lower end of the coupling is connected with an oil pipe pup joint, the male screw thread of the oil pipe pup joint is connected with the female screw thread on an open hole sieve tube, the open hole sieve tube is internally provided with a solid chemical agent cylinder, and the lower end of the open hole sieve tube is provided with an end socket; the solid chemical viscosity reducer is a tool capable of fixing a solid chemical agent at an ideal position of a well bottom, the solid chemical viscosity reducer is in contact with crude oil through an open hole in the crude oil at the well bottom and is slowly released, and the purposes of interfering wax crystal accumulation, reducing the viscosity of the crude oil and improving the fluidity of the crude oil are achieved. Viscosity reducing and oil increasing devices with different lengths are installed at the lowest end of a pump hanger according to the specific conditions of an oil well, and under the action of the viscosity reducing and oil increasing devices, a chemical viscosity reducer is mixed in oil liquid around the viscosity reducing and oil increasing devices, so that the wax precipitation condition of crude oil is disturbed, the viscosity of colloidal asphaltene is improved, and the fluidity of the oil liquid is improved.

Description

Technical Field

[0001] This invention relates to the field of petroleum extraction technology, specifically to a viscosity reducer and oil enhancer, which is a supporting device for the extraction of waxy heavy oil. Background Technology

[0002] Viscosity reducer and oil booster is a specialized tool developed for oil wells with high wax and resinous bituminous content that are difficult to extract.

[0003] my country has abundant reserves of waxy crude oil. The main characteristic of this type of crude oil is that as the temperature of the crude oil decreases, wax crystals in the crude oil precipitate and adhere to the pipe wall. Over time, the wax layer on the pipe wall becomes thicker and thicker, and the diameter of the pipe continuously shrinks. In addition, the presence of gum asphalt makes it difficult for the liquid to flow.

[0004] There are currently three main methods for extracting heavy oil: one is to use electric heating to reduce the viscosity of crude oil and improve its fluidity.

[0005] The second method is to add chemical agents from the wellhead to reduce viscosity.

[0006] The third method involves injecting hot steam from a nearby wellbore under pressure to increase the temperature of the local formation and improve the fluidity of the crude oil.

[0007] However, the first and third methods are costly, with some wells incurring costs so high that there is no profit. The second method uses chemical viscosity reducers (with a density similar to crude oil) that float on the surface of the downhole fluid and cannot reach the bottom of the well, so the viscosity-reducing effect is negligible. Summary of the Invention

[0008] This invention provides a viscosity-reducing and oil-enhancing device that can effectively solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a viscosity reducing and oil increasing device, including a coupling, the lower end of which is connected to an oil pipe short connector, the oil pipe short connector being connected to a bare-eye screen tube via a female thread end; The naked-eye sieve tube contains a cylinder of solid chemical reagent, and the lower end of the bottom naked-eye sieve tube is welded with a cap.

[0010] According to the above technical solution, the coupling is located at the top of the oil pump, and the oil pipe short connector and the open-eye screen tube include an internal solid chemical agent cylinder composed of one or more sections, with a length ranging from several meters to tens of meters.

[0011] According to the above technical solution, the solid chemical agent cylinder is a chemical substance that can reduce the viscosity of oil, and it is placed inside a naked-eye sieve tube.

[0012] According to the above technical solution, the coupling and the oil pipe short-circuit are connected by female and male threads.

[0013] According to the above technical solution, multiple female wire heads are provided, which are inserted and welded to the upper and lower ends of the inner hole of the open-eye screen tube respectively. The upper female wire head is short-connected to the oil pipe, and the lower female wire head is short-connected to the oil pipe of another one. The lower end of the lowest open-eye screen tube is welded with a cap.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention is a tool that can fix solid chemical agents at an ideal position at the bottom of the well, allowing the solid chemical viscosity reducer to be slowly released in the crude oil at the bottom of the well, thereby interfering with wax crystal accumulation, reducing crude oil viscosity, and improving crude oil fluidity. Depending on the specific conditions of the oil well, viscosity reducers and oil intensifiers of varying lengths are installed at the bottom of the pump mount. Under the action of these viscosity reducers, chemical viscosity reducers are incorporated into the surrounding oil, disrupting the waxing conditions of the crude oil and improving the viscosity of the asphaltene and gum deposits. This enhances the fluidity of the oil. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; The following are the labels in the diagram: 1. Coupling; 2. Oil pipe short connector; 3. Female thread end; 4. Open-eye screen tube; 5. Solid chemical agent cylinder; 6. End cap. Detailed Implementation

[0017] The following description, in conjunction with the accompanying drawings, illustrates the advantageous embodiments of the present invention. It should be understood that the advantageous embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0018] Example: Figure 1 As shown, the present invention provides a technical solution: a viscosity reducing and oil increasing device, including a coupling 1, with an oil pipe short connector 2 connected to the lower end of the coupling 1, and the oil pipe short connector 2 connected to the bare-eye screen tube 4 through a female thread end 3. The naked eye sieve tube 4 contains a solid chemical reagent cylinder 5, and the bottom end of the lowest naked eye sieve tube is welded with a cap 6.

[0019] The coupling 1 is located at the top of the oil pump, and the oil pipe short connector 2 and the open-eye screen tube 4 include an internal solid chemical agent cylinder 5 composed of one or more sections, with a length ranging from several meters to tens of meters.

[0020] The solid chemical agent cylinder 5 is a chemical substance that can reduce the viscosity of oil. It is placed inside the open-eye screen tube 4. The coupling 1 and the oil pipe short connector 2 are connected by threads for easy assembly. Multiple female thread ends 3 are provided and are inserted and welded to the upper and lower ends of the inner hole of the open-eye screen tube 4. The upper female thread end 3 is connected to the oil pipe short connector 2, and the lower female thread end 3 is connected to another oil pipe short connector 2. The bottom end of the lowest open-eye screen tube 4 is welded with a cap 6.

[0021] The working principle and usage process of this invention are as follows: During operation, the coupling 1 is connected to the oil pipe short joint 2. The lower end of the oil pipe short joint 2 is connected to the upper end of the female thread 3 of the bare-eye screen tube 4 containing the solid chemical agent cylinder 5 through the male thread. The lower end of the female thread 3 of the bare-eye screen tube 4 is connected to the upper end of the lower oil pipe short section 2. The lower end of the oil pipe short section 2 is connected to another section with threads 3 welded to both the upper and lower ends. The upper end of the bare-eye screen tube 4 containing the solid chemical agent cylinder 5 is connected to the female thread 3. If multiple sections are needed, they can be connected in sequence. The last section of the bare-eye screen tube 4 has a cap 6 welded to its lower end, thus completing the assembly of the entire device.

[0022] On-site installation at the well site involves connecting the coupling 1 of the viscosity reducer and oil booster to the male thread at the lower end of the pump hanger, thus completing the on-site installation.

[0023] After the viscosity reducer and oil booster are installed in the designated position downhole, the viscosity-reducing chemicals begin to be released slowly. This process effectively interferes with the waxing conditions of crude oil, improves the viscosity of asphaltene, and further enhances the fluidity of the oil. After being treated by the viscosity reducer and oil booster, the fluidity of the oil is enhanced. The oil pump is then started, and the crude oil with reduced viscosity by the viscosity reducer and oil booster is drawn into the tubing and lifted to the surface device. The viscosity reducer and oil booster ensures that the oil can flow continuously and efficiently, achieving the oil boosting effect.

[0024] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A viscosity-reducing and oil-enhancing device, characterized in that: Includes a coupling (1), the lower end of which is connected to an oil pipe short connector (2), and the oil pipe short connector (2) is connected to the bare eye screen tube (4) through a female thread end (3); The naked eye sieve tube (4) is equipped with a solid chemical agent cylinder (5), and the lower end of the lowest naked eye sieve tube (4) is welded with a cap (6).

2. The viscosity reducer and oil improver according to claim 1, characterized in that, The coupling (1) is located at the top of the viscosity reducer and oil booster. The oil pipe short connector (2) and the open-eye screen pipe (4) include an internal solid chemical agent cylinder (5) composed of one or more sections, with a length ranging from several meters to tens of meters.

3. The viscosity reducer and oil improver according to claim 1, characterized in that, The solid chemical agent cylinder (5) is a chemical substance that can reduce the viscosity of oil, and it is placed inside the naked eye sieve tube (4).

4. The viscosity reducer and oil improver according to claim 1, characterized in that, The coupling (1) and the oil pipe short connector (2) are connected by threads.

5. The viscosity reducer and oil improver according to claim 2, characterized in that, Multiple female wire heads (3) are provided, which are inserted and welded into the upper and lower ends of the inner hole of the bare eye screen tube (4). The upper female wire head (3) is connected to the oil pipe short circuit (2), and the lower female wire head (3) is connected to the oil pipe short circuit (2) of another one. The lower end of the lowest bare eye screen tube (4) is welded with a cap.

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