High-energy metal jet cutting material, preparation method and application thereof

Abstract

This invention relates to the field of high-energy metal jet cutting and its applications, specifically a PTFE-B-Al-I₂O₅ high-energy metal jet cutting material, its preparation method, and its application. The method involves adding required amounts of PTFE powder, B powder, Al powder, I₂O₅ powder, and cemented carbide grinding balls into a ball mill jar and mixing them using a ball mill to obtain an energetic powder. Then, the energetic powder is loaded into a mold and pressed using a molding process to obtain the PTFE-B-Al-I₂O₅ high-energy metal jet cutting material. This invention possesses a high theoretical calorific value and excellent energy release characteristics, rapidly burning to release a large amount of heat and gas, forming a jet that achieves a cutting effect on oil pipes. Furthermore, the preparation process is simple, efficient, and low-cost, enabling industrial production.

Description

Technical Field

[0001] This invention relates to the field of high-energy metal jet cutting and its applications, specifically a PTFE-B-Al-I2O5 high-energy metal jet cutting material, its preparation method, and its applications. The PTFE-B-Al-I2O5 high-energy metal jet cutting material described above is the high-energy metal jet cutting material of this invention. Background Technology

[0002] High-energy metal jet cutting technology, also known as high-temperature cutting torch technology, is a new type of downhole cutting technology for handling stuck pipe accidents in oil wells. It utilizes the high heat and high gas production of high-energy metal materials during combustion to erode and scour the metal target tubing, thereby achieving the purpose of cutting.

[0003] For high-energy metal jet cutting, the chemical materials used must generate a certain amount of gas to form a molten metal jet, especially crucial in underwater cutting. Al powder is often chosen as a reducing agent in its formulation, reacting with different oxidants to release a large amount of heat at high reaction temperatures. Simultaneously, gas-generating agents are added to form a high-temperature, high-pressure metal jet that scours and ablates the tubing, achieving the cutting effect. Polytetrafluoroethylene (PTFE) is used in high-energy metal jet cutting technology as a binder, improving the mechanical strength and physicochemical stability of the product. It also acts as an oxidant, reacting with Al to release a large amount of energy. Therefore, Al powder and PTFE have enormous application potential in my country's petroleum exploration and extraction sector. Summary of the Invention

[0004] This invention provides a PTFE-B-Al-I2O5 high-energy metal jet cutting material, its preparation method, and its application, overcoming the shortcomings of the prior art. It has a high theoretical calorific value and good energy release characteristics, and it can rapidly burn to release a large amount of heat and gas, thereby forming a jet to cut the oil pipe.

[0005] One of the technical solutions of this invention is achieved through the following measures: A PTFE-B-Al-I2O5 high-energy metal jet cutting material is prepared according to the following method: ball milling and powder mixing: 50g to 70g of PTFE powder with an average particle size of 20μm, 5g to 15g of B powder with an average particle size of 10μm, 5g to 20g of Al powder with an average particle size of 30μm, 10g to 25g of I2O5 powder with an average particle size of 40μm, and 400g of cemented carbide grinding balls are weighed and added to a ball mill jar. The mixture is then ball-milled and mixed to obtain an energetic powder. Molding: The energetic powder is loaded into a mold and pressed using a molding process to obtain the PTFE-B-Al-I2O5 high-energy metal jet cutting material.

[0006] The following are further optimizations and / or improvements to one of the above-mentioned technical solutions:

[0007] During the ball milling process described above, the ball milling speed is 180 r / min to 220 r / min, and the ball milling time is 2.5 h to 3.5 h.

[0008] During the above molding process, the molding pressure is 45MPa to 55MPa, and the molding holding time is 15min to 25min.

[0009] The second technical solution of the present invention is achieved through the following measures: A method for preparing a PTFE-B-Al-I2O5 high-energy metal jet cutting material, which is carried out according to the following method: ball milling and powder mixing: weigh 50g to 70g of PTFE powder with an average particle size of 20μm, 5g to 15g of B powder with an average particle size of 10μm, 5g to 20g of Al powder with an average particle size of 30μm, 10g to 25g of I2O5 powder with an average particle size of 40μm, and 400g of cemented carbide grinding balls. Add the required amount of PTFE powder, B powder, Al powder, I2O5 powder and cemented carbide grinding balls into a ball mill jar and mix them by ball milling to obtain energetic powder; molding: put the energetic powder into a mold and press it by molding process to obtain PTFE-B-Al-I2O5 high-energy metal jet cutting material.

[0010] The following are further optimizations and / or improvements to the second technical solution of the above invention:

[0011] During the ball milling process described above, the ball milling speed is 180 r / min to 220 r / min, and the ball milling time is 2.5 h to 3.5 h.

[0012] During the above molding process, the molding pressure is 45MPa to 55MPa, and the molding holding time is 15min to 25min.

[0013] The third technical solution of the present invention is achieved through the following measures: the application of a PTFE-B-Al-I2O5 high-energy metal jet cutting material in pipe cutting construction in oil extraction.

[0014] The superior effects of this invention are as follows:

[0015] The Al-I2O5 system has a high theoretical calorific value and good energy release characteristics. It can release a large amount of heat through rapid combustion. At the same time, the reaction product is I with an ultra-low boiling point, which has a high gas production rate and can form a jet to achieve a cutting effect on the oil pipe.

[0016] The PTFE-B in the system has a high theoretical calorific value and can release a certain amount of heat. At the same time, PTFE acts as a binder, improves the mechanical strength of the product, reduces the mechanical sensitivity of the agent, and improves the physicochemical stability of the agent. In addition, it also acts as a gas-generating agent when it interacts with B powder.

[0017] Employing powder metallurgy and molding technologies, it features high efficiency and low cost, enabling industrial-scale production. Attached Figure Description

[0018] Appendix Figure 1 This is a graph showing the change in reaction pressure over time when the present invention is used for novel downhole cutting. Detailed Implementation

[0019] This invention is not limited to the following embodiments; specific implementation methods can be determined based on the technical solution of this invention and actual circumstances. Unless otherwise specified, all chemical reagents and chemical products mentioned in this invention are well-known and commonly used chemical reagents and chemical products in the prior art.

[0020] The present invention will be further described below with reference to embodiments:

[0021] Example 1: The PTFE-B-Al-I2O5 high-energy metal jet cutting material was prepared according to the following method: Ball milling and powder mixing: 50g to 70g of PTFE powder with an average particle size of 20μm, 5g to 15g of B powder with an average particle size of 10μm, 5g to 20g of Al powder with an average particle size of 30μm, 10g to 25g of I2O5 powder with an average particle size of 40μm, and 400g of cemented carbide grinding balls were weighed and added to a ball mill jar. The mixture was ball milled and mixed to obtain energetic powder. Molding: The energetic powder was loaded into a mold and pressed using a molding process to obtain the PTFE-B-Al-I2O5 high-energy metal jet cutting material.

[0022] In this invention, the Al-I₂O₅ system releases a large amount of chemical energy during the chemical reaction, with a theoretical heat of reaction of 25.62 kJ / cm². 3 The reaction product I2 has an ultra-low boiling point and produces ample gas. PTFE-B has a high theoretical calorific value (13.67 kJ / cm³). 3 While improving the energy release characteristics, PTFE, as a binder, improves the mechanical strength and physicochemical stability of the product. In addition, it also acts as a gas-generating agent when interacting with B powder.

[0023] Example 2: As an optimization of the above example, when ball milling and mixing powder, the ball milling speed is 180 r / min to 220 r / min, and the ball milling time is 2.5 h to 3.5 h.

[0024] Example 3: As an optimization of the above example, during molding, the molding process pressure is 45MPa to 55MPa, and the molding holding time is 15min to 25min.

[0025] Example 4: The preparation method of the PTFE-B-Al-I2O5 high-energy metal jet cutting material is carried out according to the following steps: Ball milling and powder mixing: Weigh 50g to 70g of PTFE powder with an average particle size of 20μm, 5g to 15g of B powder with an average particle size of 10μm, 5g to 20g of Al powder with an average particle size of 30μm, 10g to 25g of I2O5 powder with an average particle size of 40μm, and 400g of cemented carbide grinding balls. Add the required amount of PTFE powder, B powder, Al powder, I2O5 powder and cemented carbide grinding balls into a ball mill jar and mix them by ball milling to obtain energetic powder; Molding: Put the energetic powder into a mold and press it by molding process to obtain PTFE-B-Al-I2O5 high-energy metal jet cutting material.

[0026] Example 5: Application of this PTFE-B-Al-I2O5 high-energy metal jet cutting material in pipe cutting construction during oil extraction.

[0027] Example 6: The PTFE-B-Al-I2O5 high-energy metal jet cutting material was prepared according to the following method: Ball milling and powder mixing: 69.92g of PTFE powder with an average particle size of 20μm, 10.08g of B powder with an average particle size of 10μm, 8.94g of Al powder with an average particle size of 30μm, 11.06g of I2O5 powder with an average particle size of 40μm, and 400g of cemented carbide grinding balls were weighed, and the required amount of PTFE powder, B powder, Al powder, I2O5 powder, and cemented carbide grinding balls are added to a ball mill jar and mixed by ball milling to obtain energetic powder. The ball milling speed is 200 r / min and the ball milling time is 3 h. Molding: The energetic powder is loaded into a mold and pressed by molding process to obtain PTFE-B-Al-I2O5 high-energy metal jet cutting material. The molding process pressure is 50 MPa and the molding holding time is 20 min.

[0028] Example 7: The PTFE-B-Al-I₂O₅ high-energy metal jet cutting material was prepared according to the following method: Ball milling and powder mixing: 52.44g of PTFE powder with an average particle size of 20μm, 7.56g of B powder with an average particle size of 10μm, 17.88g of Al powder with an average particle size of 30μm, 22.12g of I₂O₅ powder with an average particle size of 40μm, and 400g of cemented carbide grinding balls were weighed, and the required amount of PTFE powder, B powder, Al powder, I2O5 powder, and cemented carbide grinding balls are added to a ball mill jar and mixed by ball milling to obtain energetic powder. The ball milling speed is 200 r / min and the ball milling time is 3 h. Molding: The energetic powder is loaded into a mold and pressed by molding process to obtain PTFE-B-Al-I2O5 high-energy metal jet cutting material. The molding process pressure is 50 MPa and the molding holding time is 20 min.

[0029] The calorific value of the PTFE-B-Al-I₂O₅ high-energy metal jet cutting material of this invention can reach 4500 J / g. When this PTFE-B-Al-I₂O₅ high-energy metal jet cutting material is used for novel downhole cutting, the reaction pressure versus time curve is shown below. Figure 1 As shown. Figure 1 It can be seen that, under the same test conditions, the PTFE-B-Al-I2O5 high-energy metal jet cutting material of this invention can generate a high reaction pressure instantaneously.

[0030] In summary, this invention has a high theoretical calorific value and good energy release characteristics. It can rapidly burn to release a large amount of heat and gas, forming a jet to cut the oil pipe. Moreover, the preparation process is simple, efficient, and low-cost, and can be industrialized.

[0031] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A PTFE-B-Al-I2O5 high energy metal jet cutting material, characterized in that The following method was used to prepare the ball-milled powder: 50g to 70g of PTFE powder with an average particle size of 20μm, 5g to 15g of B powder with an average particle size of 10μm, 5g to 20g of Al powder with an average particle size of 30μm, 10g to 25g of I2O5 powder with an average particle size of 40μm, and 400g of cemented carbide grinding balls were weighed and added into a ball mill jar. The powder was then ball-milled and mixed to obtain energetic powder. Molding: The energetic powder is loaded into a mold and pressed using a molding process to obtain PTFE-B-Al-I2O5 high-energy metal jet cutting material. During ball milling and powder mixing, the ball milling speed is 180 r / min to 220 r / min and the ball milling time is 2.5 h to 3.5 h. During molding, the molding process pressure is 45 MPa to 55 MPa and the molding holding time is 15 min to 25 min.

2. A process for the production of PTFE-B-Al-I2O5 high energetic metal jet cutting material, characterized by The following steps are followed: Ball milling and powder mixing: Weigh 50g to 70g of PTFE powder with an average particle size of 20μm, 5g to 15g of B powder with an average particle size of 10μm, 5g to 20g of Al powder with an average particle size of 30μm, 10g to 25g of I2O5 powder with an average particle size of 40μm, and 400g of cemented carbide grinding balls. Add the required amounts of PTFE powder, B powder, Al powder, I2O5 powder, and cemented carbide grinding balls into a ball mill jar and mix them using a ball mill to obtain energetic powder. Molding: The energetic powder is loaded into a mold and pressed using a molding process to obtain PTFE-B-Al-I2O5 high-energy metal jet cutting material. During ball milling and powder mixing, the ball milling speed is 180 r / min to 220 r / min and the ball milling time is 2.5 h to 3.5 h. During molding, the molding process pressure is 45 MPa to 55 MPa and the molding holding time is 15 min to 25 min.

3. The application of the PTFE-B-Al-I2O5 high-energy metal jet cutting material according to claim 1 in pipe cutting construction in oil extraction.

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