A rocket squid-based bionic injection head for deep-sea oil wells

Abstract

The present invention is applicable to the field of offshore oilfield anti-corrosion technology, and provides a deep-sea oil well bionic injection head based on rocket squid, including an injection head body, and also including an obstacle-clearing jet nozzle, a polishing jet nozzle and a common nozzle detachably mounted on the injection head body, wherein the obstacle-clearing jet nozzle, the polishing jet nozzle and the common nozzle are all equipped with jet nozzles. The basic structure of the well injection head is constructed by imitating the geometric shape and surface texture characteristics of the bionic rocket squid, and the drag reduction technical requirements during the well diving process are met. At the same time, the obstacle-clearing jet nozzle, the polishing jet nozzle and the common nozzle are used interchangeably to meet the requirements of different working conditions. The ceramic bearings are installed on the injection head body, which can effectively increase the service life and improve the efficiency of plugging agent injection.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore oilfield anti-corrosion, and in particular relates to a deep-sea oil well bionic injection head based on a rocket squid. Background Art

[0002] The problem of pipe damage in the annulus wellbore seriously affects the safety, production efficiency and economic benefits of the wellbore. The annulus intervention system is a technology used in oil and gas well operations, which is designed to perform various operations through the annulus area to enhance oil and gas production or perform well maintenance. The annulus intervention system uses a 12mm hose, which is sent into the annulus through the wellhead bypass valve for operation. The pushing and extraction of the annulus intervention hose is completed by an external injection head. In actual application, the diving depth of the annulus intervention hose will be affected by the oil pollution and pressure inside the wellbore, which will seriously affect its diving depth.

[0003] In addition, the corrosion and impurities inside the annular wellbore directly affect the efficiency and safety of the operation. Therefore, taking preventive measures in advance, implementing regular monitoring and adopting effective cleaning technology are of great value to ensure the normal operation of the annular intervention system and improve production efficiency. The flushing structure is added to the injection head inside the wellbore of the annular intervention system, and reasonable water flow flushing can effectively improve the plugging effect.

[0004] In view of the difficulties in the deep diving process of the annular intervention system in deep-sea oil fields, it is urgent to develop a new type of deep-sea oil well bionic injection head to overcome the shortcomings in current practical applications. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a deep-sea oil well bionic injection head based on a rocket squid, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The embodiment of the present invention is implemented as follows: a deep-sea oil well bionic injection head based on rocket squid includes an injection head body, and the shape of the injection head body conforms to the rocket squid geometric curve formula as follows:

[0007] ;

[0008] where e is a numerical constant (Euler's number) defined as , e≈2.71828;

[0009] Also includes:

[0010] An obstacle-clearing jet nozzle, which is detachably mounted on the injection head body and is used for rotating and spraying water columns and injecting plugging agents;

[0011] A polishing type jet nozzle, which is detachably mounted on the injection head body and is used for rotating and spraying water columns and injecting plugging agents;

[0012] A common type nozzle, which is detachably mounted on the injection head body and is used to inject the plugging agent;

[0013] A jet nozzle is installed on an obstacle-clearing jet nozzle and a polishing jet nozzle, and is used for injecting water into the annulus wellbore for cleaning.

[0014] According to a further technical solution, the surface of the injection head body is laser engraved with lines with a depth of 150 μm and a spacing of 550 μm, the surface of the lines is sprayed with resin particles, and the outer layer is sprayed with fluorine-silicon-modified silica.

[0015] A further technical solution is that the obstacle-clearing jet nozzle is mounted on the injection head body through a ceramic bearing, and the surface of the obstacle-clearing jet nozzle is provided with seven mounting holes for mounting the jet nozzle, wherein four are evenly distributed along the circumference near the tail end, and three are evenly distributed along the circumference near the tip end;

[0016] In the case of front projection, the angle between the mounting hole near the tail end and the coordinate of the center of the circle is 90°, and the angle between the mounting hole near the tip and the coordinate of the center of the circle is 120°;

[0017] In the case of section projection, the angle between the center line of the mounting hole near the tail end and the horizontal line is 45°, and the angle between the center line of the mounting hole near the tip and the horizontal line is 35°;

[0018] The tip of the obstacle-clearing jet nozzle is provided with an injection hole with a diameter of 3 mm.

[0019] A further technical solution is that the polishing type jet nozzle is mounted on the injection head body through a ceramic bearing, and the surface of the polishing type jet nozzle is provided with seven mounting holes for mounting the jet nozzle, wherein four are evenly distributed along the circumference near the tail end, and three are evenly distributed along the circumference near the tip end;

[0020] In the case of front projection, the angle between the mounting hole near the tail end and the coordinate of the circle center is 90°, and the angle between the mounting hole near the tip and the coordinate of the circle center is 120°;

[0021] In the case of section projection, the angle between the center line of the mounting hole near the tail end and the horizontal line is 80°, and the angle between the center line of the mounting hole near the tip and the horizontal line is 80°;

[0022] The tip of the polished jet nozzle is provided with an injection hole with a diameter of 3 mm.

[0023] According to a further technical solution, the common nozzle is mounted on the injection head body through a ceramic bearing, and an injection hole with a diameter of 3 mm is left at the tip.

[0024] According to a further technical solution, the jet nozzle is connected with the obstacle-clearing jet nozzle and the polishing jet nozzle through a threaded structure, and the diameter of the jet hole is 1 mm.

[0025] The embodiment of the present invention provides a deep-sea oil well bionic injection head based on rocket squid, and its beneficial effects are as follows:

[0026] (1) By imitating the geometric shape and surface texture characteristics of the rocket squid, the basic structure of the well injection head is constructed to meet the technical requirements of drag reduction during the well diving process; on this basis, resin particles are used for surface coating, and then fluorine-silicon modified silica is sprayed to meet the requirements of hydrophobicity and oleophobicity on the surface, reducing the resistance during the diving process, increasing the diving depth, avoiding the formation of galvanic cells and chemical reactions that lead to poor operation results, and protecting the annular wellbore and seawater;

[0027] (2) The obstacle-clearing jet nozzle, polishing jet nozzle and ordinary nozzle are used interchangeably to meet the requirements of different working conditions. The ceramic bearing is installed on the injection head body, which can effectively increase the service life and improve the plugging agent injection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a rocket squid-based deep-sea oil well bionic injection head equipped with an obstacle-clearing jet nozzle provided in an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the structure of a rocket squid-based deep-sea oil well bionic injection head equipped with a polished jet nozzle provided in an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of a common nozzle structure of a deep-sea oil well bionic injection head based on a rocket squid provided by an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the main structure of an injection head of a deep-sea oil well bionic injection head based on a rocket squid provided in an embodiment of the present invention;

[0032] Figure 5 A schematic structural diagram of an obstacle-clearing jet nozzle of a deep-sea oil well bionic injection head based on a rocket squid provided in an embodiment of the present invention;

[0033] Figure 6 A schematic structural diagram of a polished jet nozzle of a deep-sea oil well bionic injection head based on a rocket squid provided by an embodiment of the present invention;

[0034] Figure 7 A schematic structural diagram of a common type nozzle of a deep-sea oil well bionic injection head based on a rocket squid provided in an embodiment of the present invention;

[0035] Figure 8 A bionic structural curve of a deep-sea oil well bionic injection head based on a rocket squid provided in an embodiment of the present invention;

[0036] Fig. 9 A schematic diagram of the surface texture structure and microscope microstructure of a deep-sea oil well bionic injection head based on a rocket squid provided in an embodiment of the present invention.

[0037] In the attached drawings: injection head body 1; obstacle-clearing jet nozzle 2; jet nozzle 3; ceramic bearing 4; polishing jet nozzle 5; ordinary jet nozzle 6. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0040] like Figure 1-8 As shown, a deep-sea oil well bionic injection head based on rocket squid is provided in one embodiment of the present invention, including an injection head body 1, and the shape of the injection head body 1 conforms to the rocket squid geometric curve formula as follows:

[0041] ;

[0042] where e is a numerical constant (Euler's number) defined as , e≈2.71828;

[0043] Also includes:

[0044] The obstacle-clearing jet nozzle 2 is detachably mounted on the injection head body 1 through a ceramic bearing 4 and is used for rotating and spraying a water column and injecting a plugging agent;

[0045] A polishing type jet nozzle 5, which is detachably mounted on the injection head body through a ceramic bearing 4, and is used for rotating and spraying a water column and injecting a plugging agent;

[0046] A common nozzle 6, which is mounted on the injection head body through a ceramic bearing 4 and is used to inject a plugging agent;

[0047] The jet nozzle 3 is installed on the obstacle-clearing jet nozzle 2 and the polishing jet nozzle 5, and is used to inject water into the annulus wellbore for cleaning.

[0048] In the embodiment of the present invention, one end of the injection head body 1 is connected to the annulus intervention hose, and the other end is connected to various nozzles through the ceramic bearing 4. The obstacle removal jet nozzle 2, the polishing jet nozzle 5 and the ordinary nozzle 6 are all conical.

[0049] When in use, first connect the injection head body 1 to the hose, select the corresponding nozzle to install the ceramic bearing 4 and connect it to the injection head body 1, install the jet nozzle 3 on the nozzle, and put the injection head into the deep well annulus to prepare for diving. During the injection head diving process, due to the microstructure and coating on the surface to achieve the purpose of drag reduction, the depth can be lowered to 350~400m. After diving to the designated position, turn on the equipment to inject clean water, and the jet nozzles of the obstacle-clearing jet nozzle 2 and the polishing jet nozzle 5 will spray water columns. The nozzles can rotate freely to perform corresponding tasks; after cleaning, inject the plugging agent, and withdraw the injection pipeline after the injection is completed. After use, the equipment can be disassembled, the structure can be cleaned, and the pipeline can be put away.

[0050] like Fig. 9 As shown, as a preferred embodiment of the present invention, the surface of the injection head body 1 is laser engraved with a texture with a depth of 150μm and a spacing of 550μm, and resin particles are sprayed on the texture surface to improve the adhesion of the coating. Fluorosilicon-modified silica is sprayed on the outer layer to achieve a hydrophobic and oleophobic operating effect. The coating has a stable chemical effect to avoid the formation of galvanic cells and chemical reactions that lead to poor operating results and pollute the annulus, wellbore and seawater.

[0051] like Figure 1 and 5 As shown, as a preferred embodiment of the present invention, the obstacle-clearing jet nozzle 2 is provided with seven mounting holes for mounting the jet nozzle on its surface, wherein four are evenly distributed along the circumference near the tail end, and three are evenly distributed along the circumference near the tip end;

[0052] In the case of front projection, the angle between the mounting hole near the tail end and the coordinate of the circle center is 90°, and the angle between the mounting hole near the tip and the coordinate of the circle center is 120°;

[0053] In the case of section projection, the angle between the center line of the mounting hole near the tail end and the horizontal line is 45°, and the angle between the center line of the mounting hole near the tip and the horizontal line is 35°;

[0054] The tip of the obstacle-clearing jet nozzle 2 is provided with an injection hole with a diameter of 3 mm.

[0055] In the embodiment of the present invention, it should be additionally explained that the mounting hole near the tail end is tilted toward the side near the tail end of the obstacle clearing type jet nozzle 2, and the mounting hole near the tip is tilted toward the side near the tip of the obstacle clearing type jet nozzle 2.

[0056] like Figure 1 and 6 As shown, as a preferred embodiment of the present invention, the surface of the polishing type jet nozzle 5 is provided with seven mounting holes for mounting the jet nozzle, of which four are evenly distributed along the circumference near the tail end and three are evenly distributed along the circumference near the tip end;

[0057] In the case of front projection, the angle between the mounting hole near the tail end and the coordinate of the center of the circle is 90°, and the angle between the mounting hole near the tip and the coordinate of the center of the circle is 120°;

[0058] In the case of section projection, the angle between the center line of the mounting hole near the tail end and the horizontal line is 80°, and the angle between the center line of the mounting hole near the tip and the horizontal line is 80°;

[0059] The tip of the polishing type jet nozzle 5 is provided with an injection hole with a diameter of 3 mm.

[0060] In the embodiment of the present invention, it should be additionally explained that the mounting hole near the tail end is tilted toward the side near the tail end of the polishing type jet nozzle 5 , and the mounting hole near the tip is tilted toward the side near the tip of the polishing type jet nozzle 5 .

[0061] like Figure 1 and 7 As shown, as a preferred embodiment of the present invention, the tip of the common nozzle 6 is provided with an injection hole with a diameter of 3 mm.

[0062] like Figure 1 As shown, as a preferred embodiment of the present invention, the bottom of the jet nozzle 3 is a threaded structure, which is used in conjunction with the obstacle-clearing jet nozzle 2 and the polishing jet nozzle 5, and the jet hole diameter is 1 mm.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A deep-sea oil well bionic injection head based on rocket squid, characterized in that: It includes an injection head body, the shape of which conforms to the rocket squid geometric curve formula as follows: ； Where e is a numeric constant defined as , e≈2.71828; Also includes: An obstacle-clearing jet nozzle, which is detachably mounted on the injection head body and is used for rotating and spraying water columns and injecting plugging agents; A polishing type jet nozzle, which is detachably mounted on the injection head body and is used for rotating and spraying water columns and injecting plugging agents; A common type nozzle, which is detachably mounted on the injection head body and is used to inject the plugging agent; A jet nozzle is installed on an obstacle-clearing jet nozzle and a polishing jet nozzle, and is used for injecting water into the annulus wellbore for cleaning.

2. The deep-sea oil well bionic injection head based on rocket squid according to claim 1 is characterized in that: The surface of the injection head body is laser engraved with lines with a depth of 150 μm and a spacing of 550 μm, the surface of the lines is sprayed with resin particles, and the outer layer is sprayed with fluorine-silicon modified silicon dioxide.

3. The deep-sea oil well bionic injection head based on rocket squid according to claim 2 is characterized in that: The obstacle-clearing jet nozzle is mounted on the injection head body through a ceramic bearing, and the surface of the obstacle-clearing jet nozzle is provided with seven mounting holes for mounting the jet nozzle, of which four are evenly distributed along the circumference near the tail end, and three are evenly distributed along the circumference near the tip end; In the case of front projection, the angle between the mounting hole near the tail end and the coordinate of the center of the circle is 90°, and the angle between the mounting hole near the tip and the coordinate of the center of the circle is 120°; In the case of section projection, the angle between the center line of the mounting hole near the tail end and the horizontal line is 45°, and the angle between the center line of the mounting hole near the tip and the horizontal line is 35°; The tip of the obstacle-clearing jet nozzle is provided with an injection hole with a diameter of 3 mm.

4. The deep-sea oil well bionic injection head based on rocket squid according to claim 2 is characterized in that: The polishing type jet nozzle is mounted on the injection head body through a ceramic bearing, and the surface of the polishing type jet nozzle is provided with seven mounting holes for mounting the jet nozzle, among which four are evenly distributed along the circumference near the tail end, and three are evenly distributed along the circumference near the tip end; In the case of front projection, the angle between the mounting hole near the tail end and the coordinate of the center of the circle is 90°, and the angle between the mounting hole near the tip and the coordinate of the center of the circle is 120°; In the case of section projection, the angle between the center line of the mounting hole near the tail end and the horizontal line is 80°, and the angle between the center line of the mounting hole near the tip and the horizontal line is 80°; The tip of the polished jet nozzle is provided with an injection hole with a diameter of 3 mm.

5. The deep-sea oil well bionic injection head based on rocket squid according to claim 2 is characterized in that: The common type nozzle is installed on the injection head body through a ceramic bearing, and an injection hole with a diameter of 3 mm is left at the tip of the nozzle.

6. The deep-sea oil well bionic injection head based on rocket squid according to claim 1 is characterized in that: The jet nozzle is connected with the obstacle-clearing jet nozzle and the polishing jet nozzle through a threaded structure, and the diameter of the jet hole is 1 mm.

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