CN203100944U - Stress state detection device for external thread of drilling tool - Google Patents

Stress state detection device for external thread of drilling tool Download PDF

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Publication number
CN203100944U
CN203100944U CN 201320011971 CN201320011971U CN203100944U CN 203100944 U CN203100944 U CN 203100944U CN 201320011971 CN201320011971 CN 201320011971 CN 201320011971 U CN201320011971 U CN 201320011971U CN 203100944 U CN203100944 U CN 203100944U
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China
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motor
ring
screw
snap close
external thread
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CN 201320011971
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Chinese (zh)
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苏建文
祖强
卢强
武新国
谢居良
胡芳婷
戴春林
樊建春
张来斌
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Petrochina Co Ltd
China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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Abstract

A stress state detection device for an external thread of a drilling tool belongs to the nondestructive testing technology field. A positioning clamping mechanism comprises a latch pull bar, a latch wrench, a right supporting ring, a latch stand, a latch, a vertical rod, a supporting ring accessory, a left supporting ring, adjusting springs and adjusting nuts. A sensor detection mechanism comprises a sensor housing, a sensor mounting ring, L-shaped flat springs, flat spring cover plates, a small slide bar, a linear bearing, an adjusting disc, screws and a spacing disc. The sensor housing is fixed on the sensor mounting ring via pivot pins. A motor drive mechanism comprises a motor sheath, a stepping motor, a motor supporting ring and the vertical rod. The stepping motor is disposed inside the motor sheath and is connected with the motor supporting ring through a fastening screw, and the motor supporting ring is in threaded connection with the vertical rod. The stress state detection device is high in structural strength, is resistant to corrosion and wearing, is fast in detection speed and high in detection precision and can rapidly and accurately detect external threads of joints of a batch of drilling tools. Moreover, the device is convenient to carry and easy to operate, exhibits high strength and fine accuracy and is suitable for on-site application.

Description

A kind of drilling tool external thread stress state pick-up unit
Technical field
The utility model relates to a kind of drilling tool external thread stress state pick-up unit, belongs to technical field of nondestructive testing, is mainly used in to detect oil drilling tools external thread stress state, for the grading of drilling tool provides foundation.
Background technology
At present, a kind of main performance of drilling tool failure is at connecting thread position rupture failure, and the fracture crack of male connection often occurs in the root of counting the 2nd or the 3rd spiral shell button from shoulder.The external thread position becomes weak link that drilling tool destroys the easily stress concentration effect because of its geometry and thread root, make it under the composite alternating stress, to germinate easily fatigue crack, and under pulsating stress and corrosive medium effect, expand, until fracture.In recent years, the FATIGUE FRACTURE PROBLEMS at tool joint internal thread position, oil field is very outstanding, and tool joint external thread fracture failure causes the influence of very severe to drilling well production, and brings enormous economic loss.Because screw thread position geometry relative complex, wall thickness is bigger, and existing conventional Dynamic Non-Destruction Measurement means diagnose tool joint external thread position stress to concentrate unusual in early days and the micro-crack aspect exists obviously not enough.Existing facts have proved, existing nondestructive testing technique (as eddy current, ultrasonic, X ray etc.), the gross imperfection that has occurred is comparatively effective for detecting, but can't go up from the root (microdefect and area of stress concentration) of fatigue damage and the drilling tool state of the art be made early stage evaluation, the accidental injury of prevention drilling tool.
The ultimate principle of magnetic memory detection technology is: the ferromagnetic metal workpiece is concentrated owing to micro-crack tired and that creep produces can stress occur at fault location, because there is magneto-mechanical effect in the ferromagnetic metal workpiece, so its lip-deep Distribution of Magnetic Field and workpiece stress load have certain corresponding relation, therefore can diagnose the defective and the area of stress concentration of workpiece indirectly by the Distribution of Magnetic Field situation that detects surface of the work.
Magnetic memory detection technology has caused great attention at home and abroad as a kind of brand-new Dynamic Non-Destruction Measurement, does not see that at present the drilling tool external thread pick-up unit achievement that has based on magnetic memory detection technology delivers.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of drilling tool external thread stress state pick-up unit.The deficiency that tool joint external thread microdefect and area of stress concentration is detected at existing the cannot-harm-detection device, the purpose of this utility model is to realize accurate detection and evaluation to tool joint external thread stress state by the detection of drilling tool external thread stress state pick-up unit realization to external thread microdefect and area of stress concentration.
The utility model provides a kind of drilling tool external thread stress state pick-up unit, mainly is made up of drilling tool positioning and clamping mechanism, transducer detecting mechanism and motor-driven mechanism;
Positioning and clamping mechanism mainly comprises snap close pull bar, locking wrench, right support ring, snap close seat, snap close, vertical rod, support ring annex, left support ring, adjusts spring and setting nut, left side sustained ring is formed the opposite opened sustained ring with right support ring and is connected with bearing pin by split pin, snap close by screw retention on left sustained ring, locking wrench is connected by the snap close bearing pin with the snap close pull bar, left side sustained ring is offered the threaded adjusting hole, add to adjust spring and setting nut on the snap close pull bar, the support ring annex by screw retention in vertical rod; The snap close small clevis pin with head connects the snap close seat;
Transducer detecting mechanism mainly comprises sensor shell, the sensor installing ring, L sheet spring, sheet spring cover plate, little slide bar, linear bearing, adjust disk, screw and position-arresting disk, sensor shell is fixed on the sensor installing ring by pivot pin, one end of L sheet spring by screw retention on the sensor installing ring, the other end is covered in the U type groove of sensor shell lower end by sheet spring cover plate, sheet spring cover plate by screw retention on sensor shell, stepped hole is left in sensor installing ring lower end, dress linear bearing in the hole, little slide bar passes this linear bearing, be connected with screw thread with the adjustment disk, little spring is enclosed within on the little slide bar, adjust the disk lower end and be connected with stepper motor by holding screw, the upper end is connected with position-arresting disk by screw; Pad is connected between little slide bar and the screw;
Motor-driven mechanism mainly comprises motor sheath, stepper motor, motor support ring and vertical rod, and stepper motor is loaded in the motor sheath, is connected by holding screw with the motor support ring, and motor support ring and vertical rod are by being threaded.
For realizing that detection needs to different model tool joint external thread, drilling tool external thread stress state pick-up unit can realize that the drilling tool reducing clamps and the external thread reducing detects requirement.
When being installed, at first, break locking wrench into two with one's hands, make support ring be in open mode, axially be inserted in support ring along drilling rod to be measured then, regulate tight fixed bolt, last closed locking wrench is finished the process of being installed.Be the be installed needs of different tube diameters drilling rod of adaptation, specially offer the threaded adjusting hole in the both sides of support ring.Because of the scene various vibrations can occur inevitably, thereby cause that snap close is loosening, support ring is opened, so add regulating spring on the snap close pull bar, adjusting nut by turn increases pretightning force, guarantees the stability that is installed.Because tool joint screw thread stress is concentrated and to be occurred in thread root mostly, therefore treat device be installed fix after, also need regulate the height of whole testing agency.
The collection of external thread stress signal is finished by the magnetic memory detecting element that is encapsulated in the sensor shell, for increasing signal cover, adopts the mode that is symmetrically distributed that sensor shell is set.Magnetic memory detecting element is to ferromagnetic signal sensitive element, for reducing the interference of external signal, so adopt not magnetic stainless steel making sensor shell.The effect of L sheet spring is to regulate the sensor shell angle, guarantee that sensor is parallel with tool joint external thread to be measured and keep stable contact, the one end is anchored on the sensor installing ring by screw, the other end is enclosed in the U type groove of sensor shell bottom by sheet spring cover plate, purpose is to prevent that the sheet spring from deviating from, and loses the effect of adjusting angle.The effect of horizontal adjustment spring is to make sensor shell be close to external threaded surface to be measured.The externally threaded detection of this mechanism's energy self-adaptation different size model drilling rod only need have been determined drilling tool range of size to be measured during work, change corresponding position-arresting disk and get final product.Motor-driven mechanism drives magnetic memory detecting element and along the circumferential direction moves, and finishes the externally threaded signals collecting of drilling rod.
Effect of the present utility model is: adopt the metal magnetic memory sensor can detect tool joint external thread microdefect and stress state, for the detection and the evaluation of the externally threaded stress state of drilling tool provides foundation.Its principal feature is:
To the tool joint of different size, this device adopts three adjustment bolt centering clamping structures to realize the externally threaded detection of different drilling tools with sensing device reducing adaptive mechanism, realizes that a covering device detects plurality of specifications model drilling rod;
Can obtain situation and fatigue damage degree that drilling tool external thread unrelieved stress and stress are concentrated;
Sensing detection device can be realized probe and externally threaded good the contact at drilling tool external thread characteristics, realizes that hyperchannel detects simultaneously, reduces the detection error that causes because of loose contact.
The utility model Stability Analysis of Structures, structural strength height, corrosion-resistant, wear-resistant, detection speed is fast, accuracy of detection is high, can realize that tool joint external thread in enormous quantities fast and accurately detects.Device is easy to carry, and is simple to operate, the intensity height, and accuracy is good, is fit to rig-site utilization.
Description of drawings
When considered in conjunction with the accompanying drawings, by the reference following detailed, can more completely understand the utility model better and learn wherein many attendant advantages easily, but accompanying drawing described herein is used to provide further understanding of the present utility model, constitute a part of the present utility model, illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model, as figure wherein:
Fig. 1 is a drilling tool external thread stress state pick-up unit master TV structure synoptic diagram of the present utility model;
Fig. 2 is a drilling tool external thread stress state pick-up unit plan structure synoptic diagram of the present utility model;
Fig. 3 is a positioning and clamping mechanism structural representation of the present utility model;
Fig. 4 is a transducer detecting mechanism structural representation of the present utility model;
Below in conjunction with drawings and Examples the utility model is further specified.
Embodiment
Obviously, the many modifications and variations done based on aim of the present utility model of those skilled in the art belong to protection domain of the present utility model.
Embodiment 1: as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, and a kind of drilling tool external thread stress state pick-up unit, main positioning and clamping mechanism, transducer detecting mechanism and motor-driven mechanism are formed,
Positioning and clamping mechanism mainly comprises snap close pull bar 14, locking wrench 16, right support ring 17, snap close seat 19, snap close 20, vertical rod 22, support ring annex 24, left side support ring 29, adjust spring 33 and setting nut 34, left side sustained ring 29 is formed the opposite opened sustained ring with right support ring 17 and is connected with bearing pin 28 by split pin 27, snap close 20 is fixed on the left sustained ring 29 by screw 21, locking wrench 16 is connected by snap close bearing pin 15 with snap close pull bar 14, left side sustained ring 29 is offered threaded adjusting hole 32, to realize the centering of different size tool joint, add on the snap close pull bar 14 and adjust spring 33 and setting nut 34, support ring annex 24 is fixed in the vertical rod 22 by screw 23; Snap close small clevis pin with head 18 connects snap close seat 19;
Transducer detecting mechanism mainly comprises sensor shell 13, sensor installing ring 11, L sheet spring 26, sheet spring cover plate 25, little slide bar 9, linear bearing, adjust disk 5, screw 7 and position-arresting disk 31, sensor shell 13 is fixed on the sensor installing ring on 11 by pivot pin 12, one end of L sheet spring 26 is fixed on the sensor installing ring 11 by screw 36, the other end is covered in the U type groove of sensor shell 13 lower ends by sheet spring cover plate 25, sheet spring cover plate 25 by screw retention on sensor shell 13, stepped hole is left in sensor installing ring 11 lower ends, dress linear bearing in the hole, little slide bar 9 passes this linear bearing, be threaded with adjustment disk 5 and screw 7, little spring 10 is enclosed within on the little slide bar 9, adjust disk 5 lower ends and be connected with stepper motor 4 by holding screw 6, the upper end is connected with position-arresting disk 31 by screw 30; Pad 8 is connected between little slide bar 9 and the screw 7;
Motor-driven mechanism mainly comprises motor sheath 1, stepper motor 4, motor support ring 2 and vertical rod 22, and stepper motor 4 is loaded in the motor sheath 1, is connected by holding screw 3 with motor support ring 2, and motor support ring 2 and vertical rod 22 are by being threaded.
Little slide bar 9 two ends are respectively internal thread and external thread, and male end is connected with adjustment disk 5, and female end is connected with screw 7.
Vertical rod 22 is external threads with motor support ring 2 links.
Be full of insulation fat in the motor sheath 1.
Sensor circumferentially distributes eight.
Embodiment 2: as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, and drilling tool external thread stress state pick-up unit,
Fig. 1, Fig. 2 are respectively drilling tool external thread stress state pick-up unit front view and vertical view, mainly comprise drilling tool positioning and clamping mechanism, transducer detecting mechanism and motor-driven mechanism three parts.
See figures.1.and.2, Fig. 3 is the positioning and clamping mechanism schematic diagram, and main effect is to finish being installed and fixing of whole device.
A kind of drilling tool external thread stress state pick-up unit, form the opposite opened sustained ring by left sustained ring 29 and right support ring 17, halved body connects by bearing pin 28, snap close 20 and snap close seat 19 are arranged respectively on two sustained rings, snap close 20 by screw retention on sustained ring, can realize the unlatching and the closure of sustained ring by locking wrench 16 and snap close pull bar 14, both link together by snap close bearing pin 15, in order to adapt to the needs of different size tool joint, offered threaded adjusting hole 32 in the both sides of support ring, can realize the centering of different size tool joint by the adjusting of adjusting bolt, snap close 20 when avoiding on-the-spot the use is loosening to cause sustained ring to be opened, adjustment spring 33 and setting nut 34 on snap close pull bar 14, have been added, by rotation setting nut 34, can change the decrement of adjusting nut 33, the pretightning force of snap close pull bar 14 is changed, thereby the stability that realization is installed makes whole testing agency reach the location and clamps.Positioning and clamping mechanism is fixed in the vertical rod 22 by support ring annex 24 and screw 23, and entire mechanism can slide up and down along vertical rod, realizes being installed position adjustments.
See figures.1.and.2, Fig. 4 is the transducer detecting mechanism schematic diagram, realizes that mainly the externally threaded stress of tool joint detects.
Because concentrating, drilling tool external thread stress mostly occurs at the root of counting the 2nd or the 3rd spiral shell button from shoulder, therefore after finishing when being installed, need regulate the height of whole testing agency by vertical rod 22, screw 23 and support ring annex 24, to realize effective detection of external thread stress.
Drilling tool external thread stress signal detects by strong magnetic memory sensor; be protection sensor mechanism and sensitivity; realize non-contact detection; strong magnetic memory sensor is packaged in the sensor shell 13; sensor shell 13 is fixed on the sensor installing ring on 11 by pivot pin 12; in order to guarantee that sensor contacts with the drilling tool external thread; regulate the angle of sensor shell 13 by L sheet spring 26; one end of L sheet spring 26 is fixed on the sensor installing ring 11 by screw 36; the other end is covered in by sheet spring cover plate 25 in the U type groove of sensor shell 13 lower ends to prevent that it from coming off; sheet spring cover plate 25 by screw retention on sensor shell 13; little slide bar 9 one ends are internal thread; the other end is an external thread; stepped hole is left in sensor installing ring 11 lower ends; dress linear bearing in the hole; little slide bar 9 passes this linear bearing; male end with adjust disk 5 by being threaded; female end is connected with screw 7; on little slide bar, be inserted in simultaneously little spring 10; change the decrement of spring by regulating little slide bar female end screw 7; thereby sensor installing ring 11 is applied radial force; make tight contact of sensor shell 13 and the male connection of different size drilling tool; thereby realize the adaptivity of sensing detection device to different tool joints; adjusting disk 5 lower ends is connected with stepper motor 4 output shafts by holding screw 6; the upper end is connected with position-arresting disk 31 by screw 30; the effect of position-arresting disk 31 is to utilize its external diameter to make the adjustment disk open certain scope in advance; different position-arresting disks has different external diameters; when detecting dissimilar tool joints; the position-arresting disk of changing corresponding size gets final product; when stepper motor 4 rotates; drive and adjust disk 5 rotations, thereby make whole testing agency realize that external thread circumferentially detects.For reaching the purpose of complete detection, adopt the mode that is symmetrically distributed to come sensor installation.Sensing detection mechanism supports by vertical rod 22 and motor and changes 2 and link together with drive system and locating clip clamping system.
See figures.1.and.2, motor driven systems mainly contains motor sheath 1, stepper motor 4, motor support change 2 and holding screw 3 form, effect is to drive sensing detection mechanism along the circumferential direction to move, and finishes the externally threaded signals collecting of drilling rod.In the majority because of the well site flammable explosive gas, be anti-detonation accident generation, so stepper motor 4 is packaged in the motor sheath 1 that is full of the fat that insulate.
During on-the-spot the use, at first carry out corresponding early-stage preparations operation, promptly adjust accordingly, and change corresponding size position-arresting disk for drilling tool external thread pick-up unit according to the supporting mechanism of well site drilling tool specifications and models to be measured to pick-up unit.After preliminary work is finished, can carry out the magnetic memory to drilling rod to be measured and detect.Move locking wrench, open support ring, and axially be inserted in along drilling rod to be measured, closed locking wrench, bolt is adjusted in turn simultaneously, the fixing and locking of finishing device.Regulate the support ring annex then and then regulate whole height of devices, make sensor shell can be close to thread root to be measured.At last, closed power switch, under the effect of stepper motor, whole sensor is done reciprocating type circular motion along thread surface, has realized all standing formula collecting work of double thread surface magnetic signal.After the data that the collect machine analyzing and processing to be calculated, can finish life assessment to drilling rod to be measured.
As mentioned above, embodiment of the present utility model is explained, but as long as not breaking away from inventive point of the present utility model and effect in fact can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation also all is included within the protection domain of the present utility model.

Claims (5)

1. a drilling tool external thread stress state pick-up unit mainly is made up of positioning and clamping mechanism, transducer detecting mechanism and motor-driven mechanism, it is characterized in that:
Positioning and clamping mechanism mainly comprises snap close pull bar, locking wrench, right support ring, snap close seat, snap close, vertical rod, support ring annex, left support ring, adjusts spring and setting nut, left side sustained ring is formed the opposite opened sustained ring with right support ring and is connected with bearing pin by split pin, snap close by screw retention on left sustained ring, locking wrench is connected by the snap close bearing pin with the snap close pull bar, left side sustained ring is offered the threaded adjusting hole, add to adjust spring and setting nut on the snap close pull bar, the support ring annex by screw retention in vertical rod; The snap close small clevis pin with head connects the snap close seat;
Transducer detecting mechanism mainly comprises sensor shell, the sensor installing ring, L sheet spring, sheet spring cover plate, little slide bar, linear bearing, adjust disk, screw and position-arresting disk, sensor shell is fixed on the sensor installing ring by pivot pin, one end of L sheet spring by screw retention on the sensor installing ring, the other end is covered in the U type groove of sensor shell lower end by sheet spring cover plate, sheet spring cover plate by screw retention on sensor shell, stepped hole is left in sensor installing ring lower end, dress linear bearing in the hole, little slide bar passes this linear bearing, be connected with screw thread with the adjustment disk, little spring is enclosed within on the little slide bar, adjust the disk lower end and be connected with stepper motor by holding screw, the upper end is connected with position-arresting disk by screw; Pad is connected between little slide bar and the screw;
Motor-driven mechanism mainly comprises motor sheath, stepper motor, motor support ring and vertical rod, and stepper motor is loaded in the motor sheath, is connected by holding screw with the motor support ring, and motor support ring and vertical rod are by being threaded.
2. a kind of drilling tool external thread stress state pick-up unit according to claim 1, it is characterized in that: little slide bar two ends are respectively internal thread and external thread, and male end is connected with the adjustment disk, and female end is connected with screw.
3. a kind of drilling tool external thread stress state pick-up unit according to claim 1, it is characterized in that: vertical rod and motor support ring link are external threads.
4. a kind of drilling tool external thread stress state pick-up unit according to claim 1 is characterized in that: be full of insulation fat in the motor sheath.
5. a kind of drilling tool external thread stress state pick-up unit according to claim 1, it is characterized in that: sensor circumferentially distributes eight.
CN 201320011971 2013-01-10 2013-01-10 Stress state detection device for external thread of drilling tool Active CN203100944U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106290555A (en) * 2015-05-26 2017-01-04 中国石油天然气股份有限公司 Drilling tool external screw thread stress detection device
CN106501354A (en) * 2016-10-17 2017-03-15 中海石油(中国)有限公司 A kind of portable diameter changing drilling tool external screw thread automatic detection device
CN106500882A (en) * 2016-10-13 2017-03-15 中海石油(中国)有限公司 A kind of bolt stress detection means
CN106768505A (en) * 2016-12-02 2017-05-31 山东省特种设备检验研究院 A kind of method of Q245R materials Non-Destructive Testing stress
CN109358113A (en) * 2018-10-26 2019-02-19 中海石油(中国)有限公司 A kind of tubing seal well head device for fast detecting
CN110108404A (en) * 2019-02-11 2019-08-09 哈尔滨工业大学 A kind of shaft-radial force test device of bearing

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106290555A (en) * 2015-05-26 2017-01-04 中国石油天然气股份有限公司 Drilling tool external screw thread stress detection device
CN106500882A (en) * 2016-10-13 2017-03-15 中海石油(中国)有限公司 A kind of bolt stress detection means
CN106500882B (en) * 2016-10-13 2019-07-02 中海石油(中国)有限公司 A kind of bolt stress detection device
CN106501354A (en) * 2016-10-17 2017-03-15 中海石油(中国)有限公司 A kind of portable diameter changing drilling tool external screw thread automatic detection device
CN106768505A (en) * 2016-12-02 2017-05-31 山东省特种设备检验研究院 A kind of method of Q245R materials Non-Destructive Testing stress
CN109358113A (en) * 2018-10-26 2019-02-19 中海石油(中国)有限公司 A kind of tubing seal well head device for fast detecting
CN109358113B (en) * 2018-10-26 2021-07-27 中海石油(中国)有限公司 Quick detection device of oil pipe leakproofness well head
CN110108404A (en) * 2019-02-11 2019-08-09 哈尔滨工业大学 A kind of shaft-radial force test device of bearing

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