Device and method for detecting content of magnetic substance in barite powder for drilling fluid

Abstract

This invention discloses a device and method for detecting the magnetic material content in barite powder used in drilling fluid, comprising an electromagnet and a sample container. One end of the electromagnet is detachably connected to the sample container, and the other end is electrically connected to a transformer. The coil of the electromagnet is wound around a frame, and the frame and coil are encased and sealed in a shell. The transformer is used to adjust the attraction force of the electromagnet, thereby fully absorbing the magnetic material in the drilling fluid. Based on the principle of electromagnet magnetization, the attraction force of the electromagnet is adjusted by controlling the adjustable transformer to fully absorb the magnetic material in the drilling fluid. The content of magnetic material in the drilling fluid is calculated by the differential weighing method, and control indicators for the magnetic material in the drilling fluid are determined to prevent the content of magnetic material from exceeding the standard and affecting drilling operations.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas drilling engineering, and specifically relates to a device and method for detecting the content of magnetic substances in barite powder used in drilling fluid. Background Technology

[0002] Magnetic substances in barite powder used in drilling fluids can interfere with tools equipped with magnetic drive functions. Currently, there are no established devices or methods for detecting the magnetic substance content in drilling fluids, making it impossible for oil and gas fields to measure the magnetic substance content in drilling fluids. Therefore, it is necessary to develop a device for detecting the magnetic substance content in drilling fluids to determine the magnetic content in barite used in drilling fluids, establish control indicators, and thereby reduce the impact on drilling operations. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a device and method for detecting the content of magnetic substances in barite powder for drilling fluid, thereby solving the problem that there is no device and method for detecting the content of magnetic substances in drilling fluid in the prior art, and thus solving the problem of magnetic substances interfering with the normal operation of drilling tools by detecting the content of magnetic substances in barite powder for drilling fluid.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] This invention discloses a device for detecting the content of magnetic substances in barite powder used in drilling fluid, comprising: an electromagnet and a sample container; one end of the electromagnet is connected to the sample container, and the other end is electrically connected to a transformer; the electromagnet is fixed on the lid of the sample container.

[0006] Preferably, the electromagnet is a cylinder, with its outer shell made of nickel-plated pure iron, its frame made of flame-retardant reinforced nylon plastic, and its coil made of copper enameled wire.

[0007] Preferably, the sample container includes a bottom and a container body, with the bottom fixed to one end of the container body and the other end of the container body detachably connected to the container lid.

[0008] This invention also discloses a method for detecting the content of magnetic substances in barite powder used in drilling fluid, comprising:

[0009] S1: Weigh the sample and place it into the sample container, and record the sample mass m1 and the mass m2 of the sample container after adding the sample.

[0010] S2: The electromagnet is installed on the sample container, the transformer is turned on, and the sample container is slowly shaken;

[0011] S3: Open the sample container and weigh the remaining sample m 3-1 ;

[0012] S4: After cleaning the electromagnet, install it on the sample container. Repeat S2 and S3 twice, and weigh the remaining sample to obtain m. 3-2 and m 3-3 ;

[0013] S5: Calculate the content of magnetic substances in barite powder used in drilling fluid before calibration;

[0014] S6: Calculate the average spiked recovery rate;

[0015] S7: The content of magnetic substances in the barite powder for drilling fluid after calibration is calculated based on the content of magnetic substances in the barite powder before calibration and the average spiked recovery rate.

[0016] Preferably, in step S1, the sample taken is a sample dried at 115℃-13℃ for 24 hours.

[0017] Preferably, the transformer in S2 has its current adjusted to 73.33mA.

[0018] Preferably, in step S2, the sample container is slowly shaken at a speed of 31 times / min for 1 minute.

[0019] Preferably, in step S5, the content of magnetic material in the barite powder used in the drilling fluid before calibration is calculated according to formula (I) and expressed as a percentage.

[0020]

[0021] In the formula:

[0022] S—Content of magnetic materials;

[0023] m1—Sample mass;

[0024] m2 — the mass of the sample and sample container before the electromagnet is placed in it;

[0025] m 3-3 —The mass of the sample and sample container after being placed in the electromagnet and attracted three times.

[0026] Preferably, in step S6, a certain amount of iron filings magnetic powder is added to a blank sample matrix without the analyte, and the sample is analyzed according to the methods in steps S1-S4 to calculate the average spiked recovery rate.

[0027] Preferably, in step S7, the content of magnetic material in the barite powder of the calibrated drilling fluid is calculated using formula (II):

[0028]

[0029] In the formula:

[0030] S—Content of magnetic materials;

[0031] R—Spiking recovery rate;

[0032] S 校 —The content of magnetic materials after calibration.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] Based on the principle of electromagnet magnetization, this invention develops a device for detecting the content of magnetic materials in barite powder used in drilling fluid, comprising an electromagnet and a sample container; one end of the electromagnet is detachably connected to the sample container, and the other end is electrically connected to a transformer; the coil of the electromagnet is wound on a frame, and the outer shell wraps and seals the frame and coil; the transformer is used to adjust the attraction force of the electromagnet, thereby fully absorbing the magnetic materials in the drilling fluid.

[0035] This invention also discloses a method for detecting the magnetic material content in barite powder used in drilling fluid. By controlling an adjustable transformer to adjust the attraction force of an electromagnet, the magnetic material in the drilling fluid is fully absorbed. The content of magnetic material in the drilling fluid is calculated by the weighing difference method, and control indicators for magnetic material in the drilling fluid are determined to prevent the content of magnetic material from exceeding the standard and affecting drilling operations. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the magnetic material content detection test device of the present invention;

[0037] Figure 2 This is a schematic diagram of the connection structure between the sample container and the electromagnet of the present invention;

[0038] Figure 3 This is a sample image of the present invention after being magnetically attracted.

[0039] Wherein: 1-Electromagnet; 2-Sample container; 3-Transformer; 4-Bottom; 5-Container body; 6-Container lid. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0042] The present invention will now be described in further detail with reference to the accompanying drawings:

[0043] Magnetic substances in barite powder used in drilling fluids can interfere with tools equipped with magnetic drive functions. Currently, there are no national or industry-standard devices or methods for detecting the magnetic substance content in drilling fluids, making it impossible for oil and gas fields to measure the magnetic substance content in drilling fluids. Therefore, it is necessary to develop a device for detecting the magnetic substance content in drilling fluids to establish control indicators and reduce its impact on drilling operations.

[0044] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a device and method for detecting the content of magnetic substances in barite powder for drilling fluid, thereby solving the problem that there is no device and method for detecting the content of magnetic substances in drilling fluid in the prior art, and thus solving the problem of magnetic substances interfering with the normal operation of drilling tools by detecting the content of magnetic substances in barite powder for drilling fluid.

[0045] Based on the principle of electromagnetism, this invention develops a device for detecting the magnetic material content in barite powder used in drilling fluids. Simultaneously, a detection method is established, which uses an adjustable transformer to regulate the electromagnet's attraction force to fully absorb the magnetic material in the drilling fluid. The magnetic material content in the drilling fluid is calculated using a weighing difference method, and control indicators for the magnetic material content in the drilling fluid are determined to prevent excessive magnetic material content from affecting drilling operations.

[0046] See Figure 1 This invention discloses a device for detecting the magnetic content of barite powder used in drilling fluid, comprising: an electromagnet 1 and a sample container 2; one end of the electromagnet 1 is connected to the sample container 2, and the other end is electrically connected to a transformer 3; the coil of the electromagnet 1 is wound on a frame, and the outer shell encloses and seals the frame and coil. The electromagnet 1 is cylindrical, its outer shell is made of nickel-plated pure iron, the frame is made of flame-retardant reinforced nylon plastic, and the coil is made of national standard purple copper enameled wire. The sample container 2 is a cylinder with an inner diameter of 33mm.

[0047] See Figure 2 The sample container 2 has a container body 5 and a container lid 6 made of plexiglass. The container body 5 is bonded to the bottom 4, and the electromagnet 1 is bonded to the container lid 6, making them non-removable. The sample container 2 and the container lid 6 with the electromagnet 1 are connected by threads, making them detachable.

[0048] 1. Electromagnet 1: Cylindrical

[0049] ① Outer shell material: Nickel-plated pure iron

[0050] ② Frame material: Flame-retardant reinforced nylon plastic

[0051] ③ Coil material: National standard purple copper enameled wire

[0052] ④ Sealing material: Resin adhesive

[0053] 2. Sample container 2:

[0054] 81mm deep, with an inner diameter of 33mm for both the top and bottom openings;

[0055] 3. Transformer 3:

[0056] 1-31V adjustable power supply;

[0057] 4. Method for detecting the magnetic content in barite powder used in drilling fluid:

[0058] 4.1 Experimental Procedure

[0059] ① Weigh 31g (accurate to 1.1111g) of the sample dried at 115℃-13℃ for 24h, record it as m1, put it into the sample container 2, cover it with the container lid 6 with electromagnet 1, tighten it, and weigh the sample and sample container 2 as m2.

[0060] ② Turn on the adjustable transformer 3 for electromagnet 1 and adjust the current to 73.33mA. Shake the sample container slowly for 1 minute at a speed of 31 times / min to allow electromagnet 1 to fully absorb the magnetic material in the sample.

[0061] ③ Open the bottle cap, remove electromagnet 1, and gently shake or vibrate it to allow the sample powder adhering to its surface to fall back into the sample container where the sample is located. Observe whether electromagnet 1 attracts magnetic substances, and weigh the remaining sample as m. 3-1 .

[0062] ④ Clean electromagnet 1 thoroughly and place it back into the sample. Cover the container with the lid 6 containing electromagnet 1 and tighten it. Repeat steps ② and ③ twice, and weigh the remaining sample to obtain mass m. 3-2 and m 3-3 .

[0063] ⑤ The content of magnetic substances in barite powder used in drilling fluid before calibration is calculated according to formula (Ⅰ) and expressed as a percentage.

[0064]

[0065] In the formula:

[0066] S—Magnetic material content, expressed as a percentage (%);

[0067] m1—Sample mass, in grams (g);

[0068] m2—The mass of the sample and sample container 2 before the electromagnet 1 is placed in the sample container, in grams (g);

[0069] m 3-3 —The mass of the sample and sample container 2 after being magnetically attracted by electromagnet 1 three times, in grams (g).

[0070] 4.2 Calibration of Magnetic Materials

[0071] To verify the accuracy of the method for determining the content of magnetic substances in barite powder used in drilling fluid, a certain amount of iron filings magnetic powder was added to a blank sample matrix without the analyte, and the sample was analyzed according to methods ①-④, and the average spiked recovery rate was calculated.

[0072] 4.3 Calibration of Magnetic Material Content

[0073]

[0074] In the formula:

[0075] S—Magnetic material content, expressed as a percentage (%);

[0076] R—Recovery rate, expressed as a percentage (%);

[0077] S-calibration—the content of magnetic material after calibration, expressed as a percentage (%).

[0078] The results of the magnetic material content in the barite powder used in drilling fluid should be reported according to the calibrated results.

[0079] The magnetic content of barite powder and raw ore samples from different manufacturers was tested, and the experimental results are as follows:

[0080]

Example 1

[0081] Manufacturer A:

[0082] Weigh 31g (accurate to 1.1111g) of the sample that has been dried at 115℃-13℃ for 24h, and record it as m1. Place it in the sample container 2, cover it with the container lid 6 with electromagnet 1, tighten it, and weigh the sample and sample container 2 as m2.

[0083] Turn on the adjustable transformer 3 dedicated to electromagnet 1 and adjust the current to 73.33mA. Shake the sample container slowly for 1 minute at a speed of 31 times / min to allow electromagnet 1 to fully absorb the magnetic material in the sample.

[0084] Open the bottle cap, remove the electromagnet, and gently shake or vibrate it to allow the sample powder adhering to its surface to fall back into the sample container where the sample is located. Observe whether the electromagnet attracts magnetic substances, and weigh the remaining sample as m. 3-1 .

[0085] Clean the electromagnet thoroughly before placing it back into the sample. Replace the electromagnet sample cover and tighten it. Repeat steps ② and ③ twice, and weigh the remaining sample to obtain the mass m. 3-2 and m 3-3 .

[0086] The content of magnetic substances in barite powder used in drilling fluid before calibration is calculated according to formula (Ⅰ) and expressed as a percentage.

[0087]

[0088] In the formula:

[0089] S—Magnetic material content, expressed as a percentage (%);

[0090] m1—Sample mass, in grams (g);

[0091] m2 — the mass of the sample and sample container before being placed into the electromagnet, in grams (g);

[0092] m 3-3 —The mass of the sample and sample container after being magnetically attracted by the electromagnet three times, in grams (g);

[0093] Given m1 = 31.1131, m2 = 119.1252, m 3-3 Substituting 119.1115 into formula (1), we get the magnetic material content S = 1.1456%.

[0094] Magnetic material calibration

[0095] To verify the accuracy of the method for determining the content of magnetic substances in barite powder used in drilling fluid, a certain amount of iron filings magnetic powder was added to a blank sample matrix without the analyte. The sample was analyzed according to methods ①-④, and the average spiked recovery rate was calculated. The average spiked recovery rate was 99.12%.

[0096] Magnetic material content calibration

[0097]

[0098] In the formula:

[0099] S—Magnetic material content, expressed as a percentage (%);

[0100] R—Recovery rate, expressed as a percentage (%);

[0101] S 校 —The content of magnetic material after calibration, in percentage (%);

[0102] Substituting S = 1.1456% and R = 99.12% into formula (II), the final S 校 =1.1461%.

[0103] Manufacturer A's drilling fluid barite powder reported a magnetic material content of 1.1461% based on the calibrated result.

[0104]

Example 2

[0105] Manufacturer B:

[0106] Weigh 31g (accurate to 1.1111g) of the sample that has been dried at 115℃-13℃ for 24h, and record it as m1. Place it in the sample container 2, cover it with the container lid 6 with electromagnet 1, tighten it, and weigh the sample and sample container 2 as m2.

[0107] Turn on the adjustable transformer 3 dedicated to electromagnet 1 and adjust the current to 73.33mA. Shake the sample container slowly for 1 minute at a speed of 31 times / min to allow electromagnet 1 to fully absorb the magnetic material in the sample.

[0108] Open the bottle cap, remove the electromagnet, and gently shake or vibrate it to allow the sample powder adhering to its surface to fall back into the sample container where the sample is located. Observe whether the electromagnet attracts magnetic substances, and weigh the remaining sample as m. 3-1 .

[0109] Clean the electromagnet thoroughly before placing it back into the sample. Replace the electromagnet sample cover and tighten it. Repeat steps ② and ③ twice, and weigh the remaining sample to obtain the mass m. 3-2 and m 3-3 .

[0110] The content of magnetic substances in barite powder used in drilling fluid before calibration is calculated according to formula (Ⅰ) and expressed as a percentage.

[0111]

[0112] In the formula:

[0113] S—Magnetic material content, expressed as a percentage (%);

[0114] m1—Sample mass, in grams (g);

[0115] m2 — the mass of the sample and sample container before being placed into the electromagnet, in grams (g);

[0116] m 3-3 —The mass of the sample and sample container after being magnetically attracted by the electromagnet three times, in grams (g);

[0117] Given m1 = 31.1193, m2 = 119.1536, m 3-3 Substituting 119.1471 into formula (Ⅰ), we get the magnetic material content S = 1.1217%.

[0118] Magnetic material calibration

[0119] To verify the accuracy of the method for determining the content of magnetic substances in barite powder used in drilling fluid, a certain amount of iron filings magnetic powder was added to a blank sample matrix without the analyte. The sample was analyzed according to methods ①-④, and the average spiked recovery rate was calculated. The average spiked recovery rate was 99.12%.

[0120] Magnetic material content calibration

[0121]

[0122] In the formula:

[0123] S—Magnetic material content, expressed as a percentage (%);

[0124] R—Recovery rate, expressed as a percentage (%);

[0125] S 校 —The content of magnetic material after calibration, in percentage (%);

[0126] Substituting S = 1.1217% and R = 99.12% into formula (II), the final S 校 =1.1219%.

[0127] Manufacturer B's drilling fluid barite powder reported a magnetic material content of 1.1219% based on the calibrated result.

[0128]

Example 3

[0129] Raw ore sample:

[0130] Weigh 31g of the sample that has been dried at 115℃-13℃ for 24h, accurate to 1.1111g, and record it as m1. Place it in the sample container 2, cover it with the container lid 6 with electromagnet 1, tighten it, and weigh the sample and sample container 2 as m2.

[0131] Turn on the adjustable transformer 3 dedicated to electromagnet 1 and adjust the current to 73.33mA. Shake the sample container slowly for 1 minute at a speed of 31 times / min to allow electromagnet 1 to fully absorb the magnetic material in the sample.

[0132] Open the bottle cap, remove the electromagnet, and gently shake or vibrate it to allow the sample powder adhering to its surface to fall back into the sample container where the sample is located. Observe whether the electromagnet attracts magnetic substances, and weigh the remaining sample as m. 3-1 .

[0133] Clean the electromagnet thoroughly before placing it back into the sample. Replace the electromagnet sample cover and tighten it. Repeat steps ② and ③ twice, and weigh the remaining sample to obtain the mass m. 3-2 and m 3-3 .

[0134] The content of magnetic substances in barite powder used in drilling fluid before calibration is calculated according to formula (Ⅰ) and expressed as a percentage.

[0135]

[0136] In the formula:

[0137] S—Magnetic material content, expressed as a percentage (%);

[0138] m1—Sample mass, in grams (g);

[0139] m2 — the mass of the sample and sample container before being placed into the electromagnet, in grams (g);

[0140] m 3-3 —The mass of the sample and sample container after being magnetically attracted by the electromagnet three times, in grams (g);

[0141] Given m1 = 31.1156g, m2 = 119.1449g, m 3-3 Substituting 119.1377g into formula (1), we get the magnetic material content S = 1.1241%.

[0142] Magnetic material calibration

[0143] To verify the accuracy of the method for determining the content of magnetic substances in barite powder used in drilling fluid, a certain amount of iron filings magnetic powder was added to a blank sample matrix without the analyte. The sample was analyzed according to methods ①-④, and the average spiked recovery rate was calculated. The average spiked recovery rate was 99.12%.

[0144] Magnetic material content calibration

[0145]

[0146] In the formula:

[0147] S—Magnetic material content, expressed as a percentage (%);

[0148] R—Recovery rate, expressed as a percentage (%);

[0149] S 校 —The content of magnetic material after calibration, in percentage (%);

[0150] Substituting S = 1.1241% and R = 99.12% into formula (II), the final S 校 =1.1242%.

[0151] The magnetic material content in the drilling fluid barite powder of the raw ore sample was reported as 1.1242% based on the calibrated content.

[0152] See Figure 3 The image shows a sample after magnetic attraction according to the present invention. As can be seen from the image, after magnetic attraction detection, the magnetic material in the sample is attracted to the surface of electromagnet 1, and the magnetic material can be clearly seen.

[0153] In summary, the purpose of this invention is to provide a device and method for detecting the magnetic material content in barite powder used in drilling fluids, solving the problem that there are no existing devices and methods for detecting the magnetic material content in drilling fluids. Furthermore, by detecting the magnetic material content in barite powder used in drilling fluids, the problem of magnetic materials interfering with the normal operation of drilling tools can be solved. Based on the principle of electromagnetism, a device for detecting the magnetic material content in barite powder used in drilling fluids has been developed, including an electromagnet and a sample container. One end of the electromagnet is detachably connected to the sample container, and the other end is electrically connected to a transformer. The coil of the electromagnet is wound around a frame, and the outer shell encloses and seals the frame and coil. The transformer is used to adjust the attraction force of the electromagnet, thereby fully absorbing the magnetic materials in the drilling fluid.

[0154] This invention also discloses a method for detecting the magnetic material content in barite powder used in drilling fluid. By controlling an adjustable transformer to adjust the attraction force of an electromagnet, the magnetic material in the drilling fluid is fully absorbed. The content of magnetic material in the drilling fluid is calculated by the weighing difference method, and control indicators for magnetic material in the drilling fluid are determined to prevent the content of magnetic material from exceeding the standard and affecting drilling operations.

[0155] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A method for detecting the content of magnetic substances in barite powder for drilling fluids, characterized by, include: S1: Weigh the sample and place it into the sample container (2), and record the sample mass m1 and the mass m2 of the sample container (2) after adding the sample. S2: The electromagnet (1) is installed on the sample container (2), the transformer is turned on, and the sample container (2) is shaken slowly. S3: Open the sample jar (2) and weigh the mass of the remaining sample m 3-1 ; S4: After cleaning the electromagnet, install it on the sample tank (2), repeat S2 and S3 twice, and weigh the mass of the remaining sample as m 3-2 and m 3-3 ; S5: Calculate the content of magnetic substances in barite powder used in drilling fluid before calibration, according to formula (Ⅰ), and express it as a percentage: ......................（Ⅰ） In the formula: S—Content of magnetic materials; m1—Sample mass; m2—mass of the sample and sample container (2) before the electromagnet (1) is placed in it; m 3-3 - Mass of the sample and sample can (2) after three magnetic attractions of the electromagnet (1) S6: Calculate the average spiked recovery rate; A fixed amount of iron filings magnetic powder was added to a blank sample matrix without the analyte, and the sample was analyzed according to methods S1-S4. The average spiked recovery rate was calculated. S7: The content of magnetic materials in the barite powder for drilling fluid after calibration is calculated based on the content of magnetic materials in the barite powder before calibration and the average spiked recovery rate. The calculation is performed using formula (II): （Ⅱ） In the formula: S—Content of magnetic materials; R—Spiking recovery rate; S 校 — calibrated magnetic substance content.

2. The method for detecting the content of magnetic substance in barite powder for drilling fluid according to claim 1, characterized in that, In S1, the sample taken is a sample dried at 105 ℃ ± 3 ℃ for 24 h.

3. The method of claim 1, wherein the method is characterized by: The transformer (3) in S2 has its current adjusted to 73.33 mA.

4. The method for detecting the content of magnetic substance in barite powder for drilling fluid according to claim 1, characterized in that, In S2, the sample container is slowly shaken at a speed of 30 times / min for 1 min (2).

5. The method for detecting the magnetic material content in barite powder for drilling fluid according to claim 1, characterized in that, The device used includes an electromagnet (1) and a sample container (2); one end of the electromagnet (1) is connected to the sample container (2), and the other end is electrically connected to the transformer (3); the electromagnet (1) is fixed on the lid (6) of the sample container (2).

6. The method for detecting the magnetic material content in barite powder for drilling fluid according to claim 5, characterized in that, The electromagnet (1) is a cylinder, with its outer shell made of nickel-plated pure iron, its frame made of flame-retardant reinforced nylon plastic, and its coil made of copper enameled wire.

7. The method for detecting the magnetic material content in barite powder for drilling fluid according to claim 5, characterized in that, The sample container (2) includes a bottom (4) and a container body (5). The bottom (4) is fixed to one end of the container body (5), and the other end of the container body (5) is detachably connected to the container lid (6).

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