CN1448706A - Method of testing pipe thread adaptor inner / external screw thread surface contact status distribution - Google Patents
Method of testing pipe thread adaptor inner / external screw thread surface contact status distribution Download PDFInfo
- Publication number
- CN1448706A CN1448706A CN 03116157 CN03116157A CN1448706A CN 1448706 A CN1448706 A CN 1448706A CN 03116157 CN03116157 CN 03116157 CN 03116157 A CN03116157 A CN 03116157A CN 1448706 A CN1448706 A CN 1448706A
- Authority
- CN
- China
- Prior art keywords
- box cupling
- end body
- screwing
- temperature sensor
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The measurement of surface contact state distribution in inner and outer thread union includes laying self-compensation axial and radial strain gauges onto coupler to obtain the varying stress signal in threaded joint part during screwing in and screwing out; laying axial and radial temperature sensors onto coupler to measure the heat signal during screwing in and screwing out; transmitting the signals via dynamic strain gauge and temperature transducer to the data processor to obtain the dynamic data of the temperature field and stress field; adopting torque gauge to control the torque during screwing in and screwing out; and adopting hydraulic motor driven splined shaft to control the screwing speed. The method of the present invention is simple, practical and accurate, and is significant in analysis, optimization and improvement of petroleum casing thread connection.
Description
Technical field:
The present invention relates to a kind of pipe screw joint internal and external threads surface contact condition distribution testing method, provide effective experimental evaluation method for detecting the oil pipe thread pair in the fit quality that screws the contact territory, for the method for operating of shackle on the standard provides scientific basis, belong to machinery and tribology technical field.
Background technology:
Along with oil-gas exploration and development develops in depth, oil gas field is more and more higher to the performance requirement of oil country tubular goods (particularly being threaded), but screw connection point is as the weakest link of sleeve pipe, have nearly 64% string of casing failure accidents to occur in this position (domestic this numeral is then up to 86%) according to statistics, so the research of oil pipe thread switching performance become the focus that domestic and international scientist pays close attention to.
Correct understanding pipe thread is connected that the distribution in temperature field and stress field is the prerequisite and the basis of raising oil pipe thread switching performance in the shackle process.Because oil pipe thread is a kind of thin-walled cast taper thread, the actual shape face of internal and external threads and the error of theoretical shape face are subjected to the influence of multiple factor (as processing, thermal treatment, material etc.), in the process of screwing, the contact condition of internal and external threads actual contact shape face is difficult to accurately estimate with analytical approachs such as simulation calculation; Stand under load complexity on the other hand, the factor that influences its switching performance is more, can not accurately reflect the actual state in its stress field and temperature field with analytical approachs such as finite elements.
API CASING CONNECTION WITH ROUND PROFILE THREAD Stress Field Distribution experiment (University of Science ﹠ Technology, Beijing's journal that Wang Li etc. delivers in the prior art related to the present invention, 2000, Vol.22 (6) .555-558.) introduced the evaluation test machine full-scale in kind that a cover is introduced from U.S. H.O.MOHR Study on Engineering Design company in the literary composition, it comprises shackle experimental machine, interior pressure experimental machine and stretching experiment machine three parts, and the experimental program of employing is that the box cupling external shaft is to even subsides foil gauge.The mensuration of this stress field can only be reacted between the internal and external threads pair contact pressure can not react it at the circumferential stress distribution of box cupling truly in the axial distribution of box cupling.This in addition method of testing also fails to measure in the shackle process because the variation in the screw connection point temperature field that the friction force between last break-out speed and the screw thread pair causes.People such as Eiji are in analog casing work and transfer cased permission moment of torsion (the Eiji Tsuru of operating mode, et al.Allowable Torque of Tubular Connection Under Simulated Running and WorkingConditions.SPE/IADC 29353,1995.) introduced a kind of be threaded experimental provision of permission moment of torsion of combined load running casing of measuring in the literary composition, this experimental provision focuses on testing the cased permission moment of torsion of different loads, adopt thermopair to detect sleeve pipe in the experiment and tighten variation of temperature in the process, its method of testing and device can not be tested accurately to the stress field and the temperature field of casing threads connecting portion.People such as Hu Yulin are inquiring into intensity and sealing property (the University of Petroleum's journal that petroleum casing pipe is threaded with photoelastic method, 1994 (6): 68-71) proposed to adopt photoelastic method to test the contact condition of internal and external threads pair in the literary composition, but this method determines that by isodiff and isoclinic line principle stress is very loaded down with trivial details, the result is qualitatively mostly, wants to carry out in the shackle process dynamic test and then be difficult to realize on oil casing threaded.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, a kind of simple pipe screw joint internal and external threads surface contact condition distribution testing method is provided, both can control break-out speed and moment of torsion exactly, stress test and temperature test are not disturbed mutually, with the accurate dynamic test in stress field and temperature field between the realization screw thread pair.
For realizing such purpose, the present invention is in the oil pipe thread make-and-break test device of design, by arranging evenly that at box cupling axial (with constant spacing L1) and circumferential (with 90 ° of fixed angles) the self-compensating strain sheet obtains the variable signal of screw connection point stress in the shackle process, signal is write down by magnetic tape recorder through dynamic strain indicator, analyzes the DYNAMIC DISTRIBUTION of threaded joints component of stress field in the shackle process at last by data processing equipment; By box cupling axially (with constant spacing L2) and circumferentially (with 120 ° of fixed angles) arrange that evenly temperature sensor measures the thermal signal of screw connection point generation in the shackle process, signal is at first analyzed by data processing equipment through temperature transmitter, can draw then because the DYNAMIC DISTRIBUTION in the screw connection point temperature field that heat of friction causes in the last shackle process.When dynamic test, adopt simultaneously the torque gauge of standard to control the moment of torsion of shackle, detain on the moment of torsion preventing; Control button speed by adopting the fluid motor-driven splined shaft.
Method of the present invention comprises following concrete steps:
1, evenly arranges self-compensating strain sheet and temperature sensor respectively on the box cupling of holding body and factory to hold body to link to each other at the scene, wherein, the self-compensating strain sheet axially evenly distributes at box cupling, box cupling circumferential arrangement four rows, the angle β of each row's foil gauge is 90 °, the layout of temperature sensor accounts for 1/2 and close on-the-spot end body of coupling length, circumferentially has 3 rows at box cupling, and each row's angle α is 120 °.
2, adopt the full-bridge mode of connection to connect the self-compensating strain sheet, can effectively eliminate because the caused thermal strain of temperature variation.
3, will post self-compensating strain sheet and temperature sensor the partial test sample (comprise box cupling and factory the end body, factory end body and box cupling had been detained on according to the rules the moment of torsion before dispatching from the factory and have been finished) be placed on the experiment porch, factory's end body links to each other with standard torquemeter, and is fixed in the support of floating.
4, the scene is held body be connected with the anchor clamps joint, the anchor clamps joint links to each other with oil motor with safety clutch by spending strong axle, makes on-the-spot end body and box cupling axis centering by adjusting to float to support.
5, will connect good lead with foil gauge and temperature sensor and be connected respectively on strainmeter and the temperature transmitter, all link to each other at last with data processing equipment.
6, startup and regulator solution pressure motor reach on-the-spot end body and reasonably go up button speed and torque wrench moment (concrete numerical value is carried out according to API RP 5C1 standard), data processing equipment then dynamically writes down upward, and the button process causes the inner stress that takes place of box cupling and the variation in temperature field, handle the relative recording data at last, draw out the true contact condition synoptic diagram that pipe thread connects the internal and external threads pair.
The inventive method is simple, and the dynamic change that can accurately measure in the oil casing threaded connection temperature field and stress field in the shackle process, the result to analyzing the mechanism of oil casing threaded connection thread gluing, the tubing thread pair is in the fit quality that screws the contact territory, optimization and the design of improvement ridge, the shackle operation has important significance for theories and direct economic benefit on the scene, standard oil field;
Description of drawings:
Fig. 1 is a pipe thread paster scheme synoptic diagram of the present invention.
Among Fig. 1,1 is factory's end body, and 2 is the ess-strain sheet, and 3 is box cupling, and 4 is on-the-spot end body, and 5 is temperature sensor.
Fig. 2 connects the bridge conspectus for foil gauge of the present invention.
Fig. 3 is shackle experiment porch synoptic diagram on the pipe thread of the present invention.
Among Fig. 3,6 is oil motor, and 7 is fixed bearing, and 8 is safety clutch, and 9 is the anchor clamps joint, and 10 is splined shaft, and 11 is torque gauge, and 12 is floating support, and 13 is lead, and 4 is on-the-spot end body, and 5 is box cupling, and 1 is factory's end body.
Embodiment:
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
Embodiments of the invention are APIJ55 φ 139.7 * 7.72mm casing round thread joint, connect the internal and external threads pair in the fit quality and the thread gluing failure mechanism that screw the contact territory to detect this kind of casing threads, and concrete testing procedure is as follows:
1. used self-compensating strain sheet and temperature sensor are demarcated, and the record calibration result;
2. as shown in Figure 1, with factory end body 1 and the on-the-spot box cupling 3 of holding body 4 to link to each other on paste self-compensating strain sheet 2 and temperature sensor 5 respectively (temperature sensor be customized, fix by magnet), wherein the self-compensating strain sheet is axially evenly distributing, its spacing L1 calculates according to the quantity of the coupling length of being tested and row's foil gauge, circumferentially having 4 row's foil gauges, the angle β between each row's foil gauge is 90 °; The distribution of temperature sensor on box cupling is axial also is uniform, but it only accounts for 1/2 of coupling length, and near on-the-spot end body, its spacing L2 calculates according to the quantity of 1/2 and one row's temperature sensor of the coupling length of being tested, circumferentially having 3 row's temperature sensors, the angle α of each row's temperature sensor is 120 °.According to selected paster scheme that measuring point place grinding process on the box cupling 3 is good, line, paster exactly connect lead and properly protect, and measuring point and lead all will have numbering.
3. adopt the full-bridge mode of connection to connect the self-compensating strain sheet as Fig. 2.
4. as shown in Figure 3, the partial test sample that posts self-compensating strain sheet and temperature sensor (is comprised box cupling 3 and factory end body 1, factory end body 1 and box cupling 3 had been detained on according to the rules the moment of torsion before dispatching from the factory and have been finished) be placed on the experiment porch, factory's end body 1 links to each other with standard torquemeter 11, and is fixed in the support 12 of floating.
5. as shown in Figure 3, hold body 4 to be connected with anchor clamps joint 9 at the scene, anchor clamps joint 9 links to each other with oil motor 6 with safety clutch 8 by spending strong 10, makes on-the-spot end body 4 and box cupling 3 axis centerings by adjusting the support 12 of floating.
6. as shown in Figure 3, will connect good lead 13 with foil gauge and temperature sensor and be connected respectively on strainmeter, magnetic tape recorder and the temperature transmitter, all link to each other at last with data processing equipment.
7. startup and regulator solution pressure motor make on-the-spot end body reach certain last button speed and torque wrench moment, the stress that test is threaded under not the same button speed and moment of torsion, detail record is gone up the numerical value that shackle process is used button speed and torque wrench moment each time.
8. according to the geometric parameter of sample, the position of foil gauge and temperature sensor and corresponding test data are drawn the distribution that shackle process PetroChina Company Limited. pipe thread connects stress field and temperature field after handling by analysis.
Test result is to the contact condition of accurate analysis APIJ55 φ 139.7 * 7.72mm casing round thread joint internal and external threads pair, screw thread screws how much of stress field, temperature field and last break-out speed, moment of torsion and the screw thread pairs self in zone and the relation of physical parameter provides scientific basis, and precision of analysis has obtained colleague expert's approval.
Claims (1)
1, the surperficial contact condition distribution testing method of a kind of pipe screw joint internal and external threads is characterized in that comprising following concrete steps:
1) box cupling (3) of holding body (4) to link to each other with factory's end body (1) is at the scene gone up and is evenly arranged self-compensating strain sheet (2) and temperature sensor (5) respectively, wherein, self-compensating strain sheet (2) axially evenly distributes at box cupling (3), box cupling (3) circumferential arrangement four rows, the angle β of each row's foil gauge is 90 °, the layout of temperature sensor (5) accounts for 1/2 and close on-the-spot end body (4) of box cupling (3) length, circumferentially has 3 rows at box cupling (3), and each row's angle α is 120 °;
2) adopt the full-bridge mode of connection to connect self-compensating strain sheet (2);
3) box cupling (3) and the factory that will post self-compensating strain sheet (2) and temperature sensor (5) holds body (1) to be placed on the experiment porch, and factory's end body (1) links to each other with standard torquemeter (11), and is fixed in the support (12) of floating;
4) scene is held body (4) be connected with anchor clamps joint (9), anchor clamps joint (9) links to each other with oil motor (6) with safety clutch (8) by spending strong axle (10), makes on-the-spot end body (4) and box cupling (3) axis centering by adjusting the support (12) of floating;
5) will connect good lead (13) with foil gauge (2) and temperature sensor (5) and be connected respectively on strainmeter and the temperature transmitter, all link to each other at last with data processing equipment;
6) startup and regulator solution pressure motor (6) reach on-the-spot end body (4) and reasonably go up button speed and torque wrench moment, data processing equipment then dynamically writes down upward, and the button process causes the inner stress that takes place of box cupling (3) and the variation in temperature field, handle the relative recording data at last, draw out the true contact condition synoptic diagram that pipe thread connects the internal and external threads pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116157 CN1188687C (en) | 2003-04-03 | 2003-04-03 | Method of testing pipe thread adaptor inner / external screw thread surface contact status distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116157 CN1188687C (en) | 2003-04-03 | 2003-04-03 | Method of testing pipe thread adaptor inner / external screw thread surface contact status distribution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1448706A true CN1448706A (en) | 2003-10-15 |
| CN1188687C CN1188687C (en) | 2005-02-09 |
Family
ID=28684147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03116157 Expired - Fee Related CN1188687C (en) | 2003-04-03 | 2003-04-03 | Method of testing pipe thread adaptor inner / external screw thread surface contact status distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1188687C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822441A (en) * | 2010-05-06 | 2012-12-12 | 住友金属工业株式会社 | Test device for oil well pipe threaded joint |
| CN104214521A (en) * | 2014-08-27 | 2014-12-17 | 上海云逸能源系统有限公司 | Novel pipeline and fluid conveying pipeline for seabed |
| CN104697713A (en) * | 2015-02-15 | 2015-06-10 | 宝鸡石油钢管有限责任公司 | Testing device and testing method for testing sealing property of special screwed joint |
| CN105466687A (en) * | 2015-12-10 | 2016-04-06 | 浙江国华余姚燃气发电有限责任公司 | A usage life monitoring device used for a high and middle pressure cylinder of a frequently rapid start and stop combined cycle steam turbine |
| CN105675301A (en) * | 2015-12-10 | 2016-06-15 | 浙江国华余姚燃气发电有限责任公司 | Main steam valve shell service life monitoring device used for frequent and fast starting-stopping combined cycle steam turbine |
| CN106525716A (en) * | 2016-09-30 | 2017-03-22 | 北京大学 | Method for automatically detecting key points for casing collars of steel pipes |
| CN108287109A (en) * | 2017-12-21 | 2018-07-17 | 北京航空航天大学 | The high accuracy of alignment fixture coupling arrangement of mechanics machine |
-
2003
- 2003-04-03 CN CN 03116157 patent/CN1188687C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822441A (en) * | 2010-05-06 | 2012-12-12 | 住友金属工业株式会社 | Test device for oil well pipe threaded joint |
| CN102822441B (en) * | 2010-05-06 | 2014-12-03 | 新日铁住金株式会社 | Test device for oil well pipe threaded joint |
| CN104214521A (en) * | 2014-08-27 | 2014-12-17 | 上海云逸能源系统有限公司 | Novel pipeline and fluid conveying pipeline for seabed |
| CN104697713A (en) * | 2015-02-15 | 2015-06-10 | 宝鸡石油钢管有限责任公司 | Testing device and testing method for testing sealing property of special screwed joint |
| CN104697713B (en) * | 2015-02-15 | 2017-09-15 | 宝鸡石油钢管有限责任公司 | A kind of experimental rig and test method for testing Special threading connector sealing |
| CN105466687A (en) * | 2015-12-10 | 2016-04-06 | 浙江国华余姚燃气发电有限责任公司 | A usage life monitoring device used for a high and middle pressure cylinder of a frequently rapid start and stop combined cycle steam turbine |
| CN105675301A (en) * | 2015-12-10 | 2016-06-15 | 浙江国华余姚燃气发电有限责任公司 | Main steam valve shell service life monitoring device used for frequent and fast starting-stopping combined cycle steam turbine |
| CN106525716A (en) * | 2016-09-30 | 2017-03-22 | 北京大学 | Method for automatically detecting key points for casing collars of steel pipes |
| CN106525716B (en) * | 2016-09-30 | 2019-07-19 | 北京大学 | A kind of key point automatic testing method of steel pipe casing coupling connection |
| CN108287109A (en) * | 2017-12-21 | 2018-07-17 | 北京航空航天大学 | The high accuracy of alignment fixture coupling arrangement of mechanics machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1188687C (en) | 2005-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5339696A (en) | Bolt torque and tension transducer | |
| US9581522B2 (en) | Distributed sensing optical fiber multi-objective multi-degree-of-freedom static and dynamic test device and method | |
| CN108896305B (en) | Thermal coupling strain measurement system and measurement method for bearing seat of aluminum shell | |
| US6240789B1 (en) | Permanently instrumented actuated valve assembly, with internally-gauged, permanently instrumented shaft | |
| CN1188687C (en) | Method of testing pipe thread adaptor inner / external screw thread surface contact status distribution | |
| CN108956144B (en) | Device and method for testing temperature rise and static rigidity of modular crossed roller bearing | |
| Liu et al. | A new method based on Fiber Bragg grating sensor for the milling force measurement | |
| CN108181037A (en) | A kind of pretightening force measuring apparatus for oil connection threaded fastener | |
| CA2134878C (en) | A system for measuring the torque applied to a threaded connection between sections of oilfield pipe | |
| CN106525424A (en) | Comprehensive measurement device and method for bearing rigidity and starting friction torque | |
| CN108709683B (en) | Flexible torque sensor dynamic test platform for modular joints | |
| JPH04262216A (en) | Apparatus for measuring load in axial direction applied on cylindrical member | |
| CN106323501B (en) | The thermometry and device of rotating machinery based on fiber grating | |
| CN106769840B (en) | The measurement method of rolling contact point transient state side-friction coefficient based on fiber grating | |
| JPH06347349A (en) | Measuring instrument of axial tension of bolt | |
| CN209946078U (en) | Calibration device of ultrasonic detection probe | |
| CN207556722U (en) | It is a kind of for the pretightning force of oil connection and friction torque measuring device | |
| CN114383932B (en) | Circumferential strain detection test method for shield tunnel model | |
| CN105370220B (en) | Underground measuring multiple parameters pipe nipple | |
| CN112229552B (en) | Bolt distributed stress state monitoring fiber bragg grating sensor | |
| CN2748890Y (en) | Fiber grating ice pressure sensor | |
| CN104977217B (en) | A kind of soil body triaxial extension test instrument | |
| CN208833481U (en) | Determine the pilot system of fastening arrangement and method for construction | |
| CN114017012B (en) | Calibration device for underground bit pressure torque measurement nipple | |
| Jing et al. | Strain measurement and experimental analysis of buttress thread joints of drill rods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |