Emergency salvage structure and method for automatic mud scraping device

Abstract

The invention provides an emergency salvage structure and method for an automatic mud scraping device. The emergency salvage structure comprises a fixed barrel, a salvage assembly installed at the top of the fixed barrel and a magnetic slip assembly arranged on the side wall of the fixed barrel. When the magnetic slip assembly is powered off, the magnetic force disappears, the electromagnet retracts back to the fixed cylinder under the action of the extension spring, the electromagnet has magnetic force when powered on, the electromagnet repels the permanent magnet on the rear portion, and the electromagnet stretches out of the fixed cylinder; the electromagnet is electrically connected with a battery and a control circuit, the limiting switch is arranged on the control circuit, and the battery and the control circuit are installed on the lower portion in the fixing cylinder. The magnetic slip assembly is arranged on the mud scraping device for braking and fixing, emergency braking can be conducted when the mud scraping device is out of control, the mud scraping device is fixed in the drill rod, then fishing is conducted after braking and fixing are removed through the fishing assembly, the risk that the mud scraping device falls off is reduced, and fishing is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas drilling engineering, and in particular to an emergency salvage structure and method of an automatic mud scraper. Background Art

[0002] During the drilling process of oil and gas wells, various working conditions such as changing drill tools, short drilling, and well cleaning involve drilling operations. In order to keep the drilling operation safe and the drill floor clean, it is usually necessary to scrape the mud from the drill pipe during the drilling process. At present, scraping the mud from the outer wall of the drill pipe has been achieved. However, due to the lack of technology for scraping the mud from the inner wall of the drill pipe, mud is still all over the drill floor during the drilling process.

[0003] The existing drill pipe inner wall scrapers are mainly gravity type and buoy type. The gravity type completely relies on its own gravity to fall inside the drill pipe and scrape the mud on the inner wall of the drill pipe; the buoy type mainly relies on the buoyancy of the scraper to float on the mud, and through the lifting of the drill pipe, the relative movement between the drill pipe and the scraper is realized to achieve the purpose of scraping mud.

[0004] Both of the above-mentioned two types of scrapers have the risk of falling, and the scrapers after falling will generally fall directly to the bottom of the well, making it difficult to salvage, and in severe cases will block the water eye. Summary of the invention

[0005] The purpose of the present invention is to provide an emergency salvage structure and method for an automatic mud scraper device, which provides a magnetic slip assembly on the mud scraper device for brake fixation. When out of control, the emergency brake can be fixed in the drill pipe, and then the salvage can be carried out after the brake fixation is released by the salvage assembly, thereby reducing the risk of the mud scraper device falling and facilitating salvage.

[0006] The embodiment of the present invention is achieved as follows:

[0007] The present invention provides an emergency salvage structure of an automatic mud scraper device, comprising a fixed barrel, a salvage assembly installed on the top of the fixed barrel, and a magnetic slip assembly arranged on the side wall of the fixed barrel; the salvage assembly comprises a salvage barrel, a salvage cone slidably connected to the top of the salvage barrel, a limit boss is arranged at the lower part of the salvage cone, a limit spring is arranged between the limit boss and the top of the salvage barrel, a limit switch is crimped at the bottom of the limit boss, and the limit switch is electrically connected to the magnetic slip assembly; the magnetic slip assembly comprises an electromagnet, a slip limit hole is opened on the fixed barrel, and the electromagnet The end is connected to the fixed cylinder through a tension spring, and the other end of the electromagnet is provided with a slip, and the slip extends out of the fixed cylinder through the limit hole, and a permanent magnet with the same magnetic property as the electromagnet when it is energized is provided in the fixed cylinder behind the electromagnet. When the electromagnet is powered off, the magnetic force disappears, and the electromagnet retracts into the fixed cylinder under the action of the tension spring. When the electromagnet is energized, it has magnetic force, and the electromagnet repels the permanent magnet behind it, and the electromagnet extends out of the fixed cylinder; the electromagnet is electrically connected to a battery and a control circuit, the limit switch is arranged on the control circuit, and the battery and the control circuit are installed in the lower part of the fixed cylinder.

[0008] Furthermore, a sealing ring is provided between the electromagnet and the fixing tube, and the sealing ring is fixedly connected to the fixing tube via screws.

[0009] Furthermore, there are three magnetic slip assemblies, which are staggeredly arranged on the outer wall of the fixed cylinder.

[0010] Furthermore, the lower portion of the salvage tube is fixedly connected to the top of the fixed tube via threads.

[0011] Furthermore, a sealing ring is provided between the salvage tube and the fixing tube.

[0012] Furthermore, a sealing ring is provided between the overshot tube and the overshot cone.

[0013] Furthermore, an armature is provided at the top of the salvage cone.

[0014] The present invention also provides an emergency salvage method for an automatic mud scraper device, which adopts any one of the above-mentioned emergency salvage structures for the automatic mud scraper device.

[0015] Preferably, the salvage cone is connected to the salvage tool to pull up the salvage cone, and the salvage tool is a rope hook or a permanent magnet.

[0016] Preferably, after the salvage tool is connected to the salvage cone, the rope is pulled to drive the salvage cone to move upward, so that the limit boss at the bottom of the salvage cone leaves the limit switch, causing the limit switch to cut off the power to the electromagnet, and the electromagnet retracts into the fixed cylinder under the action of the tension spring, thereby releasing the fixation of the magnetic slip assembly, pulling up the rope, and salvaging the mud scraper device.

[0017] The beneficial effects of the automatic mud scraping device emergency salvage structure and method provided by the present invention include:

[0018] 1. The design of the magnetic slip assembly in the emergency salvage structure of the automatic scraper device of the present invention enables the scraper device to have a braking and fixing function. When the electromagnet is powered off, the magnetic force disappears, and the electromagnet retracts into the fixing cylinder under the action of the tension spring. When the electromagnet is powered on, it has magnetic force, and the electromagnet repels the permanent magnet at the rear, and the electromagnet extends out of the fixing cylinder. Through the design of the control circuit, when it accidentally falls or loses the signal, the electromagnet is powered on, so that the magnetic slip extends out, and the scraper device is braked and fixed in the drill pipe, waiting for salvage, thereby preventing it from falling into the well;

[0019] 2. The design of the salvage assembly enables the scraper device of the present invention to be fixed by accidental brakes only by using an external rope to lift the salvage cone, which drives the limit boss to rise, thereby cutting off the power to the limit switch. The electromagnet retracts the fixed cylinder under the action of the tension spring, and the slips can be retracted, releasing the brake and directly pulling out the scraper device, making salvage very convenient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a structural front view of the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of the internal structure at A in the middle;

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of the internal structure at B in the middle;

[0024] Figure 4 It is a schematic diagram of the structure of the present invention during salvage;

[0025] Icons: 1. Fixed cylinder; 2. Salvage assembly; 21. Salvage cylinder; 22. Salvage cone; 23. Limit boss; 24. Limit spring; 25. Limit switch; 3. Magnetic slip assembly; 31. Electromagnet; 32. Tension spring; 33. Slip; 34. Permanent magnet; 35. Sealing ring; 4. Salvage tool. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1-4As shown: The present invention provides an emergency salvage structure of an automatic mud scraper device, comprising a fixed barrel 1, a salvage assembly 2 installed on the top of the fixed barrel 1 and a magnetic slip assembly 3 arranged on the side wall of the fixed barrel 1; the salvage assembly 2 comprises a salvage barrel 21, a salvage cone 22 slidably connected to the top of the salvage barrel 21, a limit boss 23 is arranged at the bottom of the salvage cone 22, a limit spring 24 is arranged between the limit boss 23 and the top of the salvage barrel 21, a limit switch 25 is crimped on the bottom of the limit boss 23, and the limit switch 25 is electrically connected to the magnetic slip assembly 3; the magnetic slip assembly 3 comprises an electromagnet 31, a slip limit hole is opened on the fixed barrel 1, and the electromagnet 31 is The end is connected to the fixed cylinder 1 through a tension spring 32, and the other end of the electromagnet 31 is provided with a slip 33, and the slip 33 extends out of the fixed cylinder 1 through the limit hole, and a permanent magnet 34 with the same magnetic property as the electromagnet 31 when it is energized is provided in the fixed cylinder 1 behind the electromagnet 31. When the electromagnet 31 is powered off, the magnetic force disappears, and the electromagnet 31 retracts into the fixed cylinder 1 under the action of the tension spring 32. When the electromagnet 31 is energized, it has magnetic force, and the electromagnet 31 repels the permanent magnet 34 at the rear, and the electromagnet 31 extends out of the fixed cylinder 1; the electromagnet 31 is electrically connected to a battery and a control circuit, and the limit switch 25 is arranged on the control circuit, and the battery and the control circuit are installed in the lower part of the fixed cylinder 1.

[0032] It should be noted that a sealing ring 35 is provided between the electromagnet 31 and the fixed tube 1, and the sealing ring 35 is fixedly connected to the fixed tube 1 by screws. The lower part of the salvage tube 21 is fixedly connected to the top of the fixed tube 1 by threads. A sealing ring is provided between the salvage tube 21 and the fixed tube 1. A sealing ring is provided between the salvage tube 21 and the salvage cone 22. A sealing ring 35 or a sealing ring can be provided between each connecting component to prevent external mud from entering the fixed tube 1.

[0033] There are three magnetic slip assemblies 3, and the three magnetic slip assemblies 3 are arranged alternately on the outer wall of the fixing cylinder 1. The design of multiple magnetic slip assemblies 3 makes the mud scraping assembly more stable and reliable when braking and fixing.

[0034] It should be noted that an armature is provided on the top of the salvage cone 22. The armature can be attracted and connected by the permanent magnet 34. A pull ring can also be provided on the top of the salvage cone 22 to facilitate hook connection and pulling.

[0035] like Figure 4 As shown, the present invention also provides an emergency salvage method for an automatic mud scraper device, which adopts any one of the above-mentioned emergency salvage structures for the automatic mud scraper device.

[0036] The fishing cone 22 is connected to the fishing tool 4, such as a rope connection hook or a permanent magnet 34.

[0037] It should be particularly noted that after the hook or permanent magnet 34 is connected to the salvage cone 22, the rope is pulled to drive the salvage cone 22 to move upward, so that the limit boss 23 at the bottom of the salvage cone leaves the limit switch 25, causing the limit switch 25 to cut off the power to the electromagnet 31. The electromagnet 31 retracts into the fixed tube 1 under the action of the tension spring 32, releases the fixation of the magnetic slip assembly 3, pulls up the rope, and salvages the mud scraper device.

[0038] The design of the magnetic slip assembly 3 in the emergency salvage structure of the automatic scraper device of the present invention enables the scraper device to have a braking and fixing function. When the electromagnet 31 is powered off, the magnetic force disappears, and the electromagnet 31 retracts into the fixed cylinder 1 under the action of the tension spring 32. When the electromagnet 31 is powered on, it has magnetic force, and the electromagnet 31 repels the permanent magnet 34 at the rear, and the electromagnet 31 extends out of the fixed cylinder 1. Through the design of the control circuit, when it accidentally falls or loses the signal, the electromagnet 31 is powered on to extend the magnetic slip 33, so that the scraper device is braked and fixed in the drill pipe, waiting for salvage, thereby avoiding it from falling into the well; the design of the salvage assembly 2 enables the scraper device of the present invention to be braked and fixed by an external rope only when it is accidentally braked and fixed, and the salvage cone 22 drives the limit boss 23 to rise, so that the limit switch 25 is powered off, and the electromagnet 31 retracts into the fixed cylinder 1 under the action of the tension spring 32, and the slip 33 can be retracted, the brake is released, and the scraper device is directly pulled out, and the salvage is very convenient and reliable.

[0039] The present invention provides a magnetic slip assembly 3 on the scraper device for brake fixation. When out of control, the device can be fixed in the drill pipe for emergency brake fixation. Then, the salvage assembly 2 can be used to release the brake fixation and then salvage can be performed, thereby reducing the risk of the scraper device falling and facilitating salvage.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An emergency salvage structure of an automatic mud scraper device, Features: It comprises a fixed tube (1), a salvaging assembly (2) installed on the top of the fixed tube (1), and a magnetic slip assembly (3) arranged on the side wall of the fixed tube (1); The salvage assembly (2) comprises a salvage tube (21), a salvage cone (22) slidably connected to the top of the salvage tube (21), a limit boss (23) being arranged at the bottom of the salvage cone (22), a limit spring (24) being arranged between the limit boss (23) and the top of the salvage tube (21), a limit switch (25) being pressed at the bottom of the limit boss (23), and the limit switch (25) being electrically connected to the magnetic slip assembly (3); The magnetic slip assembly (3) comprises an electromagnet (31), a slip limiting hole is provided on the fixed cylinder (1), one end of the electromagnet (31) is connected to the fixed cylinder (1) via a tension spring (32), the other end of the electromagnet (31) is provided with a slip (33), the slip (33) passes through the limiting hole and extends out of the fixed cylinder (1), a permanent magnet (34) having the same magnetic property as the electromagnet (31) when powered is provided in the fixed cylinder (1) behind the electromagnet (31), the magnetic force disappears when the electromagnet (31) is powered off, the electromagnet (31) retracts into the fixed cylinder (1) under the action of the tension spring (32), the electromagnet (31) has magnetic force when powered, the electromagnet (31) repels the permanent magnet (34) behind it, and the electromagnet (31) extends out of the fixed cylinder (1); The electromagnet (31) is electrically connected to a battery and a control circuit, the limit switch (25) is arranged on the control circuit, and the battery and the control circuit are installed in the lower part of the fixed cylinder (1).

2. The emergency salvage structure of the automatic mud scraper according to claim 1, Features: A sealing ring (35) is provided between the electromagnet (31) and the fixing cylinder (1), and the sealing ring (35) is fixedly connected to the fixing cylinder (1) via screws.

3. The emergency salvage structure of the automatic mud scraper according to claim 1, Features: There are three magnetic slip assemblies (3), and the three magnetic slip assemblies (3) are arranged in a staggered manner on the outer wall of the fixed cylinder (1).

4. The emergency salvage structure of the automatic mud scraper according to claim 1, Features: The lower part of the salvage tube (21) is fixedly connected to the top of the fixing tube (1) via threads.

5. The emergency salvage structure of the automatic mud scraper according to claim 1, Features: A sealing ring is provided between the salvage tube (21) and the fixing tube (1).

6. The emergency salvage structure of the automatic mud scraper according to claim 1, Features: A sealing ring is provided between the salvage tube (21) and the salvage cone (22).

7. The emergency salvage structure of the automatic mud scraper according to claim 1, Features: An armature is arranged on the top of the salvage cone (22).

8. An emergency salvage method for an automatic mud scraper device, Features: An emergency salvage structure for an automatic mud scraper device according to any one of claims 1 to 7 is adopted.

9. The emergency salvage method of the automatic mud scraper according to claim 8, Features: The salvage cone (22) is lifted by connecting the salvage tool (4) to the salvage cone (22), wherein the salvage tool (4) is a rope hook or a permanent magnet (34).

10. The emergency salvage method of the automatic mud scraper according to claim 9, Features: After the salvaging tool (4) is connected to the salvaging cone (22), the rope is pulled to drive the salvaging cone (22) to move upward, so that the limit boss (23) at the bottom of the salvaging cone leaves the limit switch (25), causing the limit switch (25) to cut off the power to the electromagnet (31), and the electromagnet (31) retracts into the fixing cylinder (1) under the action of the tension spring (32), releasing the fixation of the magnetic slip assembly (3), pulling up the rope, and salvaging the mud scraper device.

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