Multifunctional integrated shaft cleaning device and detection device thereof

Abstract

The invention discloses a multifunctional integrated shaft cleaning device and a detection device thereof. The shaft cleaning device comprises an upper connector, an upper centralizer, a mandrel, a casing brush assembly, a scraper assembly, a lower centralizer and a lower connector which are fixedly connected in sequence. Wherein the upper centralizer and the lower centralizer are both internally provided with centralizer inner sleeves, and the scraper component assembly and the casing brush assembly are both arranged on the mandrel in a sleeving mode. The multifunctional integrated shaft cleaning device can enter a well together with a drilling plug tool, a milling tool, a drifting tool and other tools, the functions of a casing scraper, a casing brush, a strong magnetic fisher and the like are integrated, drifting, pipe scraping, sand washing and well washing operations are completed through one tubular column, and the problems that in well completion shaft cleaning operation, the number of tripped tubular columns is large, working procedures are complex, the function of used cleaning tools is single, and the working efficiency is high are solved. And the temperature resistance is insufficient.

Description

Technical Field

[0001] The invention belongs to the technical field of oil well wellbore cleaning, and in particular relates to a multifunctional integrated wellbore cleaning device and a detection device thereof. Background Art

[0002] At present, there is an integrated scraping device based on the well-draining gauge and scraper technology at the well-washing construction site. The transformation of the well-draining gauge to the scraper is completed through the deformation device. The blade of the hydraulic scraper is not opened when entering the well. It can be entered into the well at the same time as the drilling plug, milling, and well-draining tools. After completing the drilling plug, milling, and well-draining, the scraper is opened by throwing a ball to pressurize and then the wall scraping operation is carried out. The well-draining, scraping, and sand flushing operations are completed in one trip of the tubing. However, this tool is mainly used for well repair operations in medium and shallow wells, and has not yet been used for deep well wellbore cleaning. In addition, the tool has relatively single functions, obviously insufficient temperature resistance, and the operation procedure is not obviously simplified, and the tool has a small application range.

[0003] Chinese patent CN202222748308 discloses a one-trip pipe column scraping deformation device, comprising an upper joint, a main body, a lower joint and a center pipe, the upper joint, the main body and the lower joint are fixedly connected in sequence, the center pipe is slidably inserted in the main body, and its lower end is installed on the inner wall of the lower joint through a shear pin; it also includes a scraper, an upper support rod, a lower support rod and a push rod, a plurality of axial grooves are provided on the main body, the scraper is located in the groove, the upper support rod and the lower support rod are respectively located on the upper and lower sides of the scraper, both of which are hinged to the scraper, the upper end of the upper support rod is hinged to the top of the groove, and the lower end of the lower support rod is hinged to the upper end of the push rod; the push rod is axially slidably arranged at the lower part of the groove, and a plurality of support seats inserted into the lower part of the groove are provided on the outer wall of the center pipe, the support seats are located on the lower side of the push rod, and a compression spring is provided between the two; when the shear pin is not disconnected, the scraper is in an extended state; when the shear pin is disconnected, the center pipe and the support seat move downward, and the scraper is in a retracted state. The tool functions of this device are relatively simple. During wellbore cleaning operations, especially in the ultra-deep, high-temperature, and high-pressure environments of deep and ultra-deep wells, it faces difficulties such as complex high risks, reduced reliability, many trips to lift and lower the tubing, and low operating efficiency. Summary of the invention

[0004] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to solve the problem that the existing wellbore cleaning device has a single function. To achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0005] A multifunctional integrated wellbore cleaning device, the wellbore cleaning device comprising: an upper joint, an upper centralizer, a core shaft, a casing brush assembly, a scraper assembly assembly, a lower centralizer and a lower joint fixedly connected in sequence; wherein the upper centralizer and the lower centralizer are both installed with a centralizer inner sleeve, and the scraper assembly assembly and the casing brush assembly are both sleeved on the core shaft.

[0006] Furthermore, a plurality of magnetic strips are installed on the core shaft, and a plurality of circumferentially distributed protruding sections are provided on the core shaft corresponding to between the upper centralizer and the casing brush assembly, and grooves are provided on both circumferential sides of the protruding sections, and the magnetic strips are installed in the grooves.

[0007] Furthermore, the sleeve brush assembly includes a plurality of groups of bristles equidistantly arranged in a circle, and the bristles are evenly distributed in a spiral.

[0008] Furthermore, the scraper assembly includes: a fixed ring, a scraper frame and a scraper. The fixed ring and the scraper frame are each provided with multiple scrapers. A scraper frame is provided between two adjacent fixed rings. The scraper frame is ring-shaped, and multiple scrapers equidistantly distributed around the circumference are installed in the scraper frame.

[0009] Furthermore, a scraper frame inner sleeve is provided between the scraper frame and the core shaft.

[0010] Furthermore, the scraper includes a left-handed scraper and a right-handed scraper, and in the same scraper frame, the left-handed scraper and the right-handed scraper are arranged at intervals.

[0011] Furthermore, a disc spring seat is provided in the inner sleeve of the scraper holder, and a disc spring is sleeved on the disc spring seat. The disc spring applies a force to the scraper in a direction away from the core shaft.

[0012] Furthermore, a partition ring is provided between the upper joint and the upper centralizer, and between the lower joint and the lower centralizer, a plurality of bosses are provided on one side of the partition ring, and recesses cooperating with the bosses are provided in the upper centralizer and the lower centralizer.

[0013] Furthermore, the partition ring and the inner sleeve of the centralizer are both made of copper alloy, and the surfaces thereof are plated with a graphite layer.

[0014] Furthermore, spiral guide grooves are provided in the upper centralizer and the lower centralizer.

[0015] The present invention also provides a detection device for detecting the multifunctional integrated wellbore cleaning device, the detection device comprising: a metering device, a large displacement pump, a filter, a well washing fluid storage tank, a hydraulic lift, a joint, a rotating motor, a circulating heating device, a simulated wellbore and a test casing;

[0016] The simulated wellbore is used to simulate the wellbore in the bottom of the well on site;

[0017] The experimental casing is used to simulate the casing in the bottom of the well on site;

[0018] The circulating heating device is used to heat the simulated wellbore;

[0019] The joint is used to connect with the upper joint end of the wellbore cleaning device;

[0020] The rotating motor is used to provide power for the wellbore cleaning device;

[0021] The hydraulic lift is used to drive the wellbore cleaning device to move along its axial direction;

[0022] The well-washing fluid storage tank is used to store the well-washing fluid to be tested;

[0023] The filter is used to filter the well washing fluid to be tested;

[0024] The large displacement pump is used to pump the well-washing fluid to be tested in the well-washing fluid storage tank into the wellbore cleaning device;

[0025] The metering device is used to detect the usage amount of the well flushing fluid to be tested.

[0026] Furthermore, a return pipe is provided between the test casing and the well washing fluid storage tank, and the metering device is installed in the return pipe.

[0027] Technical effects and advantages of the present invention:

[0028] The multifunctional integrated wellbore cleaning device can be put into the well at the same time as the drilling plug, milling, well cleaning tools, etc. It combines the functions of casing scraper, casing brush, strong magnetic salvage device, etc. It can complete the well cleaning scraping, sand flushing and well washing operations in one trip of the tubing string, thus solving the problems of multiple tubing strings being raised and lowered, complicated procedures, single function of the cleaning tools used, and insufficient temperature resistance in the well completion cleaning operation.

[0029] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A multifunctional integrated wellbore cleaning device according to the present invention;

[0031] Figure 2 This is a schematic diagram of the installation of a magnetic strip in a multifunctional integrated wellbore cleaning device of the present invention;

[0032] Figure 3 A schematic diagram of a scraper assembly in a multifunctional integrated wellbore cleaning device of the present invention;

[0033] Figure 4 It is a schematic diagram of the connection structure between the scraper assembly and the fixing ring in a multifunctional integrated wellbore cleaning device of the present invention;

[0034] Figure 5 It is a schematic diagram of a simulated wellbore test tooling in a multifunctional integrated wellbore cleaning device of the present invention.

[0035] In the figure: 1-upper joint, 2-partition ring, 3-inner sleeve of centralizer, 4-upper centralizer, 5-core shaft, 6-casing brush assembly, 7-bristles, 8-scraper assembly, 9-lower centralizer, 10-lower joint, 11-magnetic strip, 12-fixing ring, 13-inner sleeve of scraper holder, 14-scraper holder, 15-disc spring seat, 16-left-hand scraper, 17-disc spring, 18-right-hand scraper, 19-metering device, 20-large displacement pump, 21-filter, 22-well washing fluid storage tank, 23-hydraulic lift, 24-joint, 25-rotating motor, 26-circulating heating equipment, 27-simulated wellbore, 28-test casing. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In addition, in the invention, the terms "first", "second" and other similar words are not intended to imply any order, quantity and importance, but are merely used to distinguish different elements, and the terms "upper", "lower", "left", "right" and other similar words are merely positional relationships in the drawings.

[0038] The embodiment of the present invention discloses a multifunctional integrated wellbore cleaning device, comprising: an upper joint 1, an upper centralizer 4, a mandrel 5, a casing brush assembly 6, a scraper assembly 8, a lower centralizer 9 and a lower joint 10, which are fixedly connected in sequence; wherein, a centralizer inner sleeve 3 is installed inside the upper centralizer 4 and the lower centralizer 9, and the centralizer inner sleeve 3 is used between the central shaft and the centralizer. When the central shaft rotates, the centralizer inner sleeve has the function of wear-resistant lubrication; the scraper assembly 8 and the casing brush assembly 6 are both sleeved on the mandrel 5. A spiral guide groove is provided inside the upper centralizer 4 and the lower centralizer 9.

[0039] like Figure 2 As shown, in one embodiment of the present invention, a plurality of magnetic strips 11 are also installed on the core shaft 5, and a plurality of circumferentially distributed protruding sections are provided on the core shaft 5 corresponding to between the upper centralizer 4 and the casing brush assembly 6, and grooves are provided on both sides of the circumference of the protruding sections, and the magnetic strips 11 are installed in the grooves.

[0040] In one embodiment of the present invention, the sleeve brush assembly 6 is composed of a plurality of groups of bristles 7 arranged equidistantly around the circumference, and the bristles 7 are evenly distributed in a spiral.

[0041] like Figure 3As shown, in one embodiment of the present invention, the scraper assembly 8 includes: a fixed ring 12, a scraper frame inner sleeve 13, a scraper frame 14 and a scraper. The fixed ring 12 and the scraper frame 14 are each provided with multiple, and a scraper frame 14 is provided between two adjacent fixed rings 12. The scraper frame 14 is ring-shaped, and a scraper frame inner sleeve 13 is provided between the scraper frame 14 and the core shaft 5. The scraper frame 14 is installed with multiple scrapers equidistantly distributed around the circumference.

[0042] like Figure 4 As shown, three groups of scrapers constitute the functional part of the entire scraper cage. There are rectangular notches at both ends of the scraper frame 14, and there are two raised rectangular blocks on both sides of the fixed ring 12, which are staggered. When they are combined together, the fixed ring 12 staggers the axial distribution of the two groups of scraper components, and the scrapers cover 360° radially. When the central axis rotates with the drill pipe, the fixed ring 12 connects the entire scraper cage, so that they move relatively uniformly in the axial direction and do not rotate with the drill pipe, which greatly reduces the damage to the inner wall of the casing. In addition, the core shaft 5 can rotate with the drill, and the functional area does not rotate.

[0043] like Figure 3 As shown, in one embodiment of the present invention, the scraper includes a left-handed scraper 16 and a right-handed scraper 18. In the same scraper frame 14, the left-handed scraper 16 and the right-handed scraper 18 are arranged alternately.

[0044] like Figure 3 As shown, in one embodiment of the present invention, a disc spring seat 15 is provided in the inner sleeve 13 of the scraper holder, and a disc spring 17 is sleeved on the disc spring seat 15. The disc spring 17 applies a force to the scraper in a direction away from the core shaft 5.

[0045] like Figure 1 As shown, in one embodiment of the present invention, a partition ring 2 is provided between the upper joint 1 and the upper stabilizer 4, and between the lower joint 10 and the lower stabilizer 9, and a plurality of bosses are provided on one side of the partition ring 2, and recesses cooperating with the bosses are provided in the upper stabilizer 4 and the lower stabilizer 9.

[0046] It should be noted that in the present invention, a multifunctional integrated wellbore cleaning device integrates three functions: casing wall scraping, casing brush, and strong magnetic fishing. Its scraper cage part, casing brush part, strong magnetic adsorption part, and the centralizers at both ends are collectively referred to as functional areas.

[0047] In one embodiment of the present invention, the partition ring 2 and the centralizer inner sleeve 3 are made of copper alloy, and a graphite layer is plated on their surfaces.

[0048] In addition, the present invention also provides a detection device for detecting the multifunctional integrated wellbore cleaning device, such as Figure 4As shown, the detection device includes: a metering device 19, a large-displacement pump 20, a filter 21, a well-washing fluid storage tank 22, a hydraulic lift 23, a joint 24, a rotating motor 25, a circulating heating device 26, a simulated wellbore 27 and a test casing 28.

[0049] Specific:

[0050] The simulated wellbore 27 is used to simulate the wellbore in the well bottom on site, and the experimental casing 28 is used to simulate the casing in the well bottom on site. Cement scale, wax blocks, iron filings and other dirt that are easy to appear on site are sprinkled on the wall of the experimental casing 28 in advance, and are placed in the simulated wellbore 27 after solidification; the circulating heating device 26 is used to circulate and heat the simulated wellbore 27 to simulate the temperature of the well bottom on site; the joint 24 is connected to the upper end of the wellbore cleaning device (upper joint 1), the rotating motor 25 is used to drive the wellbore cleaning device to rotate, and the upper part of the joint 24 is connected to the hydraulic The lift 23 can realize lifting and rotating actions; the well washing fluid storage tank 22 is filled with the well washing fluid to be tested. After being filtered by the filter 21, the well washing fluid is pumped into the wellbore cleaning device by the large-displacement pump 20. While repeatedly lifting and lowering the cleaning action or rotating while drilling, the well washing fluid flows into the test casing 28 after passing through the wellbore cleaning device, and finally flows back to the well washing fluid storage tank 22 through the reflux pipe. When the well washing fluid flows back to the well washing fluid storage tank 22, it will pass through the metering device 19 to count the usage of the well washing fluid through the metering device 19.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional integrated wellbore cleaning device, characterized in that: The wellbore cleaning device comprises: an upper joint (1), an upper centralizer (4), a core shaft (5), a casing brush assembly (6), a scraper assembly (8), a lower centralizer (9) and a lower joint (10) which are fixedly connected in sequence; wherein the upper centralizer (4) and the lower centralizer (9) are both provided with a centralizer inner sleeve (3), and the scraper assembly (8) and the casing brush assembly (6) are both sleeved on the core shaft (5).

2. A multifunctional integrated wellbore cleaning device according to claim 1, characterized in that: A plurality of magnetic strips (11) are also mounted on the core shaft (5), and a plurality of circumferentially distributed protruding sections are provided on the core shaft (5) corresponding to between the upper centralizer (4) and the casing brush assembly (6), and grooves are provided on both circumferential sides of the protruding sections, and the magnetic strips (11) are mounted in the grooves.

3. The multifunctional integrated wellbore cleaning device according to claim 1, characterized in that: The sleeve brush assembly (6) comprises a plurality of groups of bristles (7) arranged at equal distances from each other in a circumference, and the bristles (7) are evenly distributed in a spiral.

4. The multifunctional integrated wellbore cleaning device according to claim 1, characterized in that: The scraper assembly (8) comprises: a fixed ring (12), a scraper frame (14) and a scraper. The fixed ring (12) and the scraper frame (14) are each provided with a plurality of scrapers. A scraper frame (14) is provided between two adjacent fixed rings (12). The scraper frame (14) is ring-shaped, and a plurality of scrapers equidistantly distributed around a circumference are installed in the scraper frame (14).

5. The multifunctional integrated wellbore cleaning device according to claim 4, characterized in that: A scraper frame inner sleeve (13) is provided between the scraper frame (14) and the core shaft (5).

6. The multifunctional integrated wellbore cleaning device according to claim 4, characterized in that: The scraper comprises a left-handed scraper (16) and a right-handed scraper (18). In the same scraper frame (14), the left-handed scraper (16) and the right-handed scraper (18) are arranged at intervals.

7. The multifunctional integrated wellbore cleaning device according to claim 4, characterized in that: A disc spring seat (15) is arranged in the inner sleeve (13) of the scraper holder, a disc spring (17) is sleeved on the disc spring seat (15), and the disc spring (17) applies a force to the scraper in a direction away from the core shaft (5).

8. The multifunctional integrated wellbore cleaning device according to claim 1, characterized in that: A partition ring (2) is provided between the upper joint (1) and the upper centralizer (4), and between the lower joint (10) and the lower centralizer (9). A plurality of bosses are provided on one side of the partition ring (2). Recesses that cooperate with the bosses are provided in the upper centralizer (4) and the lower centralizer (9).

9. The multifunctional integrated wellbore cleaning device according to claim 8, characterized in that: The partition ring (2) and the centralizer inner sleeve (3) are both made of copper alloy, and the surfaces thereof are plated with a graphite layer.

10. A multifunctional integrated wellbore cleaning device according to any one of claims 1 to 9, characterized in that: The upper centralizer (4) and the lower centralizer (9) are both provided with spiral guide grooves.

11. A detection device for detecting a multifunctional integrated wellbore cleaning device as claimed in claims 1 to 10, characterized in that: The detection device comprises: a metering device (19), a large displacement pump (20), a filter (21), a well-washing fluid storage tank (22), a hydraulic lift (23), a joint (24), a rotating motor (25), a circulation heating device (26), a simulated wellbore (27) and a test casing (28); The simulated wellbore (27) is used to simulate the wellbore in the bottom of the well on site; The experimental casing (28) is used to simulate the casing in the bottom of the well on site; The circulating heating device (26) is used to heat the simulated wellbore (27); The joint (24) is used to connect with the upper joint of the wellbore cleaning device; The rotating motor (25) is used to provide power for the wellbore cleaning device; The hydraulic lift (23) is used to drive the wellbore cleaning device to move along its axial direction; The well-washing fluid storage tank (22) is used to store the well-washing fluid to be tested; The filter (21) is used to filter the well washing fluid to be tested; The large displacement pump (20) is used to pump the well-washing fluid to be tested in the well-washing fluid storage tank (22) into the wellbore cleaning device; The metering device (19) is used to detect the usage amount of the well flushing fluid to be tested.

12. A detection device according to claim 11, characterized in that: A return pipe is provided between the test casing (28) and the well-washing fluid storage tank (22), and the metering device (19) is installed in the return pipe.

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