CN-121988979-A - Method for preventing titanium alloy magnetic detection type underground anti-collision tool from concentrating machining stress and titanium alloy magnetic detection type underground anti-collision tool

CN121988979ACN 121988979 ACN121988979 ACN 121988979ACN-121988979-A

Abstract

The invention relates to the technical field of oil and gas well drilling and completion tool processing, and discloses a method for preventing the concentration of processing stress of a titanium alloy magnetic detection type underground anti-collision tool and the titanium alloy magnetic detection type underground anti-collision tool, wherein firstly, slice inspection is carried out on two ends of a titanium alloy bar required by main body outer cylinder processing, and the qualified bar can be used as a processing raw material; clamping bar stock on a lathe spindle, turning the bar stock on the surface of the bar stock, observing whether the surface has cracks or flaws, detecting the flaw on the surface by using magnetic powder, machining an axial deep hole and a sinking groove of a main body outer cylinder, observing the returning condition of chips in the machining process, observing whether the inner surface has cracks or flaws affecting the mechanical strength after the through hole is machined, turning threads at two ends of the main body outer cylinder, and performing microscopic examination on the surfaces of the threads after the threads are machined. The invention fills the blank of the processing technology of the passive magnetic detection type underground anti-collision tool manufactured by the titanium alloy material, can reduce the drilling and completion cost, and simultaneously provides data basis for the subsequent remote technical support.

Inventors

GAO YONGWEI
ZHAO WENZHUANG
YANG XIANLI
CHEN CAIZHENG
LI XIAOLI
GAO FENG
WANG PEIFENG
ZHANG XUSHUAI
LI YANWEI
FANG DAN

Assignees

中国石油天然气集团有限公司
中国石油集团川庆钻探工程有限公司

Dates

Publication Date: 20260508
Application Date: 20241106

Claims (10)

1. A method for preventing the concentration of machining stress of a titanium alloy magnetic detection type underground anti-collision tool, which is characterized by comprising the following steps: S1, slicing and checking two ends of a titanium alloy bar required by processing an outer cylinder of a main body of the underground anti-collision tool, wherein the difference of slice performance data of the two ends is less than 3% and is a qualified product, otherwise, the slice performance data of the two ends is a unqualified product; S2, selecting qualified titanium alloy bars to be clamped on a lathe spindle, starting a lathe, firstly turning on the surface of the bars, stopping a cutter, and carefully observing whether micro cracks or flaws exist on the surface; s3, detecting the flaw of the primary turning surface by using magnetic powder, and observing whether micro cracks or flaws exist in the material or not; s4, machining an axial deep hole of the outer barrel of the underground anti-collision tool main body on a lathe, and roughly machining the deep hole into a through hole, wherein in the machining process, the returning situation of chips is observed, if the returned cutting shape is abnormal, the machining is stopped and a new titanium alloy bar is replaced; s5, after the rough machining of the through hole of the outer barrel of the main body of the underground anti-collision tool is finished, finely turning the through hole to a designed size; S6, a peeping lens is placed in the through hole, and whether the inner surface of the through hole is cracked or not or the defect affecting the mechanical strength is carefully observed; s7, turning drill collar threads at two ends of an outer cylinder of a main body of the underground anti-collision tool, and performing microscopic examination on the thread surface after thread machining is completed; s8, machining a sinking groove on the surface of the outer cylinder of the main body of the underground anti-collision tool, wherein the feeding amount of each time is 2-2.5mm in the machining process, and the rotating speed of a lathe spindle is 500-600 revolutions per minute.
2. The method for preventing stress concentration in a titanium alloy magnetic probe type underground anti-collision tool according to claim 1, wherein the step S8 further comprises performing ultrasonic flaw detection on the whole main body outer cylinder after the sink machining is completed.
3. The method for preventing the concentration of machining stress of the titanium alloy magnetic detection type underground anti-collision tool according to claim 1, further comprising the steps of S9, after the whole machining of the main body outer cylinder is completed, performing bending rotation fatigue experiments simulating field conditions on the main body outer cylinder, performing electron microscope analysis on the dangerous section of the main body outer cylinder after the experiments are completed, and comprehensively optimizing the machining method according to analysis results.
4. The method for preventing the concentration of the processing stress of the titanium alloy magnetic detection type underground anti-collision tool according to claim 1, further comprising the steps of S10, assembling the rest elements of the magnetic detection type underground anti-collision tool on a processed main body outer cylinder to form a complete underground anti-collision tool, merging the complete underground anti-collision tool into well simulation operation, disassembling the tool after the simulation operation experiment is completed, carrying out magnetic particle inspection on a dangerous section of the main body outer cylinder, judging whether microcracks are generated or not, analyzing to obtain the safety of the titanium alloy underground tool, and comprehensively optimizing the processing method according to analysis results.
5. The method for preventing the concentration of the processing stress of the titanium alloy magnetic detection type underground anti-collision tool according to claim 1, wherein the titanium alloy bar required by the processing of the outer cylinder of the main body of the underground anti-collision tool is naturally aged outdoors before being processed.
6. The method for preventing the concentration of machining stress of the titanium alloy magnetic detection type underground anti-collision tool according to claim 1, wherein in the step S2, when a cutter is turned on the surface of a bar, the cutter is fed by 5-6mm, and the rotating speed of a lathe spindle is 200-300 revolutions per minute.
7. The method for preventing the concentration of machining stress of the titanium alloy magnetic detection type underground anti-collision tool according to claim 1, wherein the step S2 comprises the steps of continuously finish turning a tool on the primary turning surface of the bar, feeding the tool by 1-2mm, rotating a lathe spindle at 400-450 rpm, stopping the tool, and carefully observing whether micro cracks or flaws exist on the surface.
8. The method for preventing the concentration of machining stress of a titanium alloy magnetic probe type downhole anti-collision tool according to claim 1, wherein in the step S4, the rotating speed of a lathe spindle is 400-500 revolutions per minute and the depth of each feeding of a cutter is 1.5-2mm in the process of finishing a through hole on a lathe.
9. The method for preventing the concentration of machining stress of the titanium alloy magnetic detection type downhole anti-collision tool according to claim 1, wherein in the step S8, a cooling liquid is sprayed at a contact part of a cutter and the surface of a bar in the process of machining a sinking groove.
10. A titanium alloy magnetic detection type underground anti-collision tool which is characterized by comprising a main body outer cylinder and a magnetic probe arranged on the main body outer cylinder, wherein the main body outer cylinder is formed by processing the method according to any one of the claims 1-9.

Description

Method for preventing titanium alloy magnetic detection type underground anti-collision tool from concentrating machining stress and titanium alloy magnetic detection type underground anti-collision tool Technical Field The invention relates to the technical field of oil and gas well drilling and completion tool processing, in particular to a method for preventing the concentration of processing stress of a titanium alloy magnetic detection type underground anti-collision tool and the titanium alloy magnetic detection type underground anti-collision tool. Background In recent years, the number of shale oil and gas adopted well group development modes is increasing year by year, limited by the enhancement of environmental protection policies. In recent years, the development of the Changqing shale oil adopts multi-layer, large well cluster and three-dimensional development modes, wherein a Hua H100 platform single platform deploys 31 horizontal well heads with a well head distance of 8m and a well head row distance of 31m, the collision prevention pressure of a diameter section and an inclined well section is huge, and the requirements on underground collision prevention tools are urgent correspondingly. The passive magnetic positioning anti-collision tool is connected to a drilling tool, magnetism of an adjacent well casing is detected in real time in the drilling process, so that real well deviation directions of the adjacent well are prepared for real-time anti-collision, and in order to ensure the magnetic detection effect of the tool, a non-magnetic material is preferably used for manufacturing the underground magnetic detection anti-collision tool. The magnetic detection type underground anti-collision tool manufactured by the titanium alloy material has the following similar technical measures for reference, and firstly, the research progress of service damage behavior of the titanium alloy drill rod material for oil and gas drilling is considered that severe environment resources such as deep oil and gas, ocean combustible ice and the like gradually become the main energy recovery field. The increasingly severe drilling and production environment puts higher demands on the service performance of the petroleum drill pipe. The high-performance titanium alloy drill rod has the characteristics of low density, high strength, corrosion resistance, fatigue resistance and the like, and can effectively improve the energy drilling and production capacity and efficiency under severe environments such as high temperature, high pressure, high corrosion, dynamic load and the like. The method analyzes the restriction factors of large-scale popularization and application of the titanium alloy drill rod in China, reviews the research and development of service damage behavior mechanisms such as corrosion, fatigue and the like of the titanium alloy drill rod in strong acid and complex dynamic loading drilling and production environments, combines the actual service working conditions, points out the existing problems, and hopes for future research directions. Secondly, the titanium alloy oil well pipe has a plurality of advantages which are not possessed by the carbon steel oil well pipe, and the titanium alloy oil well pipe is the first choice for replacing the traditional oil well pipe. The characteristics and advantages of the titanium alloy oil well pipe are summarized, the research and development process of the production of the titanium alloy oil well pipe at home and abroad, the current situation of the adaptability research of the titanium alloy oil well pipe material and the field application situation in recent years are summarized, and the application prospect and the development direction of the titanium alloy oil well pipe for petroleum and natural gas in China are expected. The above data are studied and described with respect to the application and development direction of titanium alloy materials in the oil and gas industry, but there is no systematic study and description of the processing method of titanium alloy materials for making magnetic detection type underground anti-collision tools. In addition, the titanium alloy material in the petroleum industry is only used on a small amount of drill rods, and more asymptomatic fractures occur in the experimental process, so that the processing and the use of drill collars and underground magnetic detection type anti-collision tools in the underground compressive bending environment are unprecedented. Therefore, development and processing of the titanium alloy magnetic detection type underground anti-collision tool are needed to be carried out, so that requirements of different production requirements on the passive type accurate magnetic detection type underground anti-collision tool are met, and meanwhile, the blank of the processing technology of the magnetic detection type underground anti-collision tool manufactured by the titanium alloy material is