CN102410814A - Method for measuring transition area at thickening end in drill rod - Google Patents
Method for measuring transition area at thickening end in drill rod Download PDFInfo
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- CN102410814A CN102410814A CN2010102877325A CN201010287732A CN102410814A CN 102410814 A CN102410814 A CN 102410814A CN 2010102877325 A CN2010102877325 A CN 2010102877325A CN 201010287732 A CN201010287732 A CN 201010287732A CN 102410814 A CN102410814 A CN 102410814A
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Abstract
The invention discloses a method for measuring a transition area at a thickening end in a drill end. The method comprises the following steps of: a, measuring each fixed interval step pitch in the axial direction of the inner wall of a pipe and the value L (L1, L2...) of the distance from the inner wall of the pipe to the axial line of the inner wall of the pipe to obtain a group of points E (E1, E2...) which are positioned opposite to the axial line of the pipe wall; b, determining a near thickening end transition area inner wall quadratic function f1 (Miu), a near pipe body transition area inner wall quadratic function f2 (Miu), a thickening end inner wall linear function f (dou) and a pipe body inner wall linear function f (d) by a curvilinear regression method; c, determining a cross point D1 through the function f1 (Miu) and the function f (dou), and determining a cross point D2 through the function f2 (Miu) and the function f (d); and d, determining the length Miu of the transition area at the thickening end in the drill rod through the cross points D1 and D2. By the method, the length of an internal conical section which is transited from an internal thickening section to a pipe body can be calculated without damages to the drill rod; and the method is convenient to operate and is accurate and reliable.
Description
Technical field
The present invention relates to field of measurement, is a kind of measuring method specifically, the measuring method of upset end zone of transition in particularly a kind of drilling rod.
Background technology
The drilling rod that is used for oil drilling is made by the API standard production.Its structure is tool joint pin of each butt welding and a tool joint box at the drill pipe body two ends.Because body is thinner, in order to increase the intensity with the joint junction, the butt welding of body two ends is partly thickeied.The thickening form has three kinds of interior thickening, external upset and IEUs, and wherein IEU is the thickening form that drilling rod generally adopts.
As shown in Figure 1, for internal-external upset drill pipe, D is the body external diameter, and d is an internal diameter of tube body, and Dou is the upset end external diameter, and dou is the upset end internal diameter.Leu is the external upset segment length, and Meu is the outer cone segment length of external upset section and body transition.Liu is an interior thick section length, and Miu is the female cone segment length of interior thick section and body transition.R is the fillet of transition between female cone segment length Miu and the body.
In above parameters, the parameter Miu and the R of interior upset end zone of transition are extremely important.Along with the increase of Miu length and the increase of R radius, the stress of interior upset end zone of transition end point reduces gradually, and stress concentration degree reduces gradually, thereby has improved the fatigue lifetime of drilling rod, avoids body to pierce through the generation of accident.Because the characteristics of process for upsetting itself have determined that the R radius must increase when Miu length increases.Therefore the API standard is clearly stipulated, Miu >=76.2mm, and CNPC's industry standard is further stipulated Miu >=100mm.
Though drilling rod Miu is most important to the quality of drilling rod product, all the time, this critical technical parameter lacks effective measurement means, especially the on-line Full detection of Miu global problem especially.Before this, mainly adopt destructive anatomic measurement and nondestructive Tracing instrument to measure two kinds for the measurement of Miu.Anatomic measurement can only sampling Detection.And Tracing instrument is measured because measuring speed is very slow, and obtaining still needs after the data artificially to judge, has a strong impact on production capacity, also can only the off-line sampling Detection.
Chinese patent 200720075014.X discloses thick section self-operated measuring unit in a kind of drilling rod, is used to measure overall size parameter in the drilling rod three-dimensional, and it comprises gage beam, driving mechanism; Gage beam comprises the measurement casing, and its tank wall has measurement window; Optical frames is mounted on measures in the casing corresponding measurement window; The light source body is located at optical frames group one side; Video camera is located at optical frames group opposite side, and the data of gathering are sent to the control computer structure; Driving mechanism is connected in gage beam.During detection; The light source body sends one group of divergent beams, and through the reflection of optical frames group, the permeametry window along the circumferential direction forms a plurality of hot spots of one group of annular spread at tested drilling rod inside surface; Each hot spot is represented certain point on the interior profile of drilling rod; These hot spots are formed the picture back by the video camera sampling through optical frames again, handle through view data, obtain the volume coordinate of hot spot loca.When gage beam when drill rod axis moves, each hot spot scans a bus profile of drilling rod inside surface, thereby obtains accurately overall size parameter in the drilling rod three-dimensional.
Chinese patent 02215180.X has provided thickening track surveying instrument in a kind of drilling rod.Adopt this surveying instrument to confirm the length of Miu through measuring the thickening geometric locus again by the thickening geometric locus of 1: 1 scale.But geometric locus still needs its flex point of artificial judgment on the one hand, and can't solve the difficult problem of accurate judgement, and error is bigger.On the other hand, carry out after wanting during measurement earlier the track surveying instrument to be fixed to drill rod end, required time is longer, can't carry out on-line measurement, can only carry out off-line measurement, incompatible production requirement continuously again.
Summary of the invention
The technical matters that the present invention will solve is: upset end zone of transition measuring method in a kind of drilling rod is provided, and this measuring method can be under the prerequisite of not destroying drilling rod, the female cone segment length of thick section and body transition in calculating.And this measuring method Measuring Time is short, easy to operate, accurately and reliably.
In order to solve the problems of the technologies described above, the present invention provides the measuring method of upset end zone of transition in a kind of drilling rod, and it comprises measuring instrument, and said measuring instrument comprises
Gage beam, this gage beam comprise,
Measure casing, its tank wall has the measurement window that supplies light to see through;
The optical frames group is arranged at and measures in the casing, and correspondence is positioned at measurement window, establishes reflecting surface, and this reflecting surface and axis are an angle;
The light source body is arranged at optical frames group one side;
Video camera is arranged at the other side of optical frames group, and the data of gathering are sent to a control computer structure;
Driving mechanism is connected in gage beam;
Control computer electrically connects driving mechanism and gage beam respectively, is preferably said measuring method and may further comprise the steps:
A, employing measuring instrument are measured every fixed interval step pitch inside pipe wall is axial, and inside pipe wall is to distance value L (L1, the L2 of its axis ...), obtain one group of tube wall point E (E1, the E2 at its axis place relatively simultaneously ...);
B, employing curvilinear regression method are confirmed nearly upset end zone of transition inwall quadratic function f1 (Miu), nearly body zone of transition inwall quadratic function f2 (Miu), upset end inwall linear function f (dou) and inboard wall of tube body linear function f (d);
C, confirm intersection point D1 by nearly upset end zone of transition inwall quadratic function f1 (Miu) and upset end inwall linear function f (dou), nearly body zone of transition inwall quadratic function f2 (Miu) confirms intersection point D2 with inboard wall of tube body linear function f (d);
D, according to two intersection point D1 and D2, confirm that upset end length of transition zone Miu is the distance between some D1 and the D2 in the drilling rod.
According to measuring method of the present invention, the scope that is preferably said fixedly step pitch is 0.5～20mm.
According to measuring method of the present invention, the coverage that is preferably said measuring instrument axially-movable measurement is from the inside 500mm of pipe end.
Upset end zone of transition measuring method in the drilling rod of the present invention can be under the prerequisite of not destroying drilling rod, the female cone segment length of thick section and body transition in calculating, and this measuring method Measuring Time is short, easy to operate, accurately and reliably.
Description of drawings
Fig. 1 is a drilling rod IEU synoptic diagram in the prior art;
Fig. 2 is distance value L (L1, the L2 of the inside pipe wall of measuring instrument detection in the measuring method according to the invention to its axis ...) with tube wall relatively some E (E1, the E2 at its axis place ...) synoptic diagram;
Fig. 3 is in the measuring method according to the invention, adopts the curvilinear regression method, with each section synoptic diagram in the function representation pipe.
Embodiment
Below, combine accompanying drawing that the present invention is made more detailed description with embodiment.Present embodiment only is the description to best mode for carrying out the invention, scope of the present invention is not had any restriction.
Embodiment
As shown in Figure 2, the probe of measuring instrument gets into body, the distance of measuring vertical axial direction upper tube body axis to inside pipe wall along the body axially-movable.Every in the axial direction fixed interval step pitch is measured a value, obtains one group of distance value L (L1, L2 ...), obtain some E (E1, E2 that one group of tube wall belongs to simultaneously ...).According to this group point E, adopt the curvilinear regression method, obtain nearly upset end zone of transition inwall quadratic function f1 (Miu), nearly body zone of transition inwall quadratic function f2 (Miu), upset end inwall linear function f (dou) and four functions of inboard wall of tube body linear function f (d).Wherein adopt linear function or quadratic function to represent each section tube wall track; Be because upset end inwall and inboard wall of tube body all are straight lines; So select for use linear function to represent, and upset end zone of transition inwall all is a curve with nearly body zone of transition inwall, so adopt quadratic function to represent.
As shown in Figure 3, confirm intersection point D1 by nearly upset end zone of transition inwall quadratic function f1 (Miu) and upset end inwall linear function f (dou), nearly body zone of transition inwall quadratic function f2 (Miu) confirms intersection point D2 with inboard wall of tube body linear function f (d).Make D1 and D2 and meet at D1 ', D2 ' to the vertical line of baseline L.Distance between D1 ' and the D2 ' is upset end length of transition zone Miu in the drilling rod that records.
Be example with Φ 127 * 9.19mm drilling rod below, specify the implementation process of measuring method according to the invention.
If each parameter size of upset end is following behind Φ 127 * 9.19 drill pipe thickenings:
The body D outer diameter is 127mm,
Internal diameter of tube body d nominal value is 108.62mm,
Upset end D outer diameter ou is about 135mm,
Upset end inner diameter d ou is about 85mm,
External upset segment length Leu is about 85mm,
The outer cone segment length Meu of external upset section and body transition is about 50mm,
Interior thick section length L iu is about 80mm,
The female cone segment length Miu of interior thick section and body transition between 150-180,
And the mensuration of its upset end length of transition zone is following:
With the initial measurement point of measuring instrument laser probe is initial point O, is the Y axle with the laser probe working direction, is that the X axle is set up plane coordinate system XOY with the laser measurement direction of vertical Y axle.Laser probe is measured with certain step pitch collection point, obtains one group of distance value of tube wall, the coordinate points An of one group of tube wall of plane coordinate system XOY (xn, yn), as shown in table 1.
Wherein:
The coordinate of the tube wall point that An representes to measure under the plane coordinate system,
Xn is the abscissa value of tube wall point,
Yn is the ordinate value of tube wall point.Laser probe advances and gathers data with a step pitch, i.e. yn-yn-1=step pitch, and when n=1, y1=0.
Table 1 is measured API standard 5, and " (127 * 9.19) thicken a group of coordinate figure An (xn, yn) (unit: mm) that drilling rod obtains
| n | x | y | n | x | y | n | x | y |
| 1 | 32.4 | 10.0 | 11 | 35.8 | 110.0 | 21 | 43.9 | 210.0 |
| 2 | 32.4 | 20.0 | 12 | 36.6 | 120.0 | 22 | 44.1 | 220.0 |
| 3 | 32.4 | 30.0 | 13 | 37.4 | 130.0 | 23 | 44.1 | 230.0 |
| 4 | 32.4 | 40.0 | 14 | 38.2 | 140.0 | 24 | 44.0 | 240.0 |
| 5 | 32.4 | 50.0 | 15 | 39.1 | 150.0 | 25 | 44.1 | 250.0 |
| 6 | 32.5 | 60.0 | 16 | 39.9 | 160.0 | 26 | 44.1 | 260.0 |
| 7 | 32.8 | 70.0 | 17 | 40.8 | 170.0 | 27 | 44.0 | 270.0 |
| 8 | 33.4 | 80.0 | 18 | 41.7 | 180.0 | 28 | 44.1 | 280.0 |
| 9 | 34.2 | 90.0 | 19 | 42.6 | 190.0 | 29 | 44.1 | 290.0 |
| 10 | 35.0 | 100.0 | 20 | 43.5 | 200.0 | 30 | 44.1 | 300.0 |
(1) upset end inwall linear function f (dou) confirms
According to the coordinate system of setting up, according to our actual measurement experience, at an A
nEstablish straight-line equation at optional 2 in (n is 1-4), though can there be error in this, error is very little, within the acceptable range.By A in the table
2, A
42 are established straight-line equation is f (dou)=x=32.4
(2) nearly upset end transition zone quadratic function f1 (Miu) confirms
If quadratic function f1 (Miu)=y=ax
2+ bx+c
A
nConfirm: work as x
n-x
N-1During>=0.3mm, promptly think A
nPoint is for the point in transitional zone zone, by A
n, A
N+1, A
N+2Confirm quadratic function f1 (Miu) together at 3.
When n=7, satisfy x in promptly showing
7-x
6>=0.3mm condition is promptly by A
7, A
8, A
93 definite equations:
70＝32.8×32.8×a+32.8×b+c
80＝33.4×33.4×a+33.4×b+c
90＝34.2×34.2×a+34.2×b+c
Obtain:
a＝-0.2976，b＝36.3678，c＝-802.6938
Be quadratic function f1 (Miu)=y=-0.2976x
2+ 36.3678x-802.6938
3, nearly body transition zone quadratic function f2 (Miu) confirms
If quadratic function f2 (Miu)=y=dx
2+ ex+f
A
nConfirm: work as x
n-x
N-1During＜0.3mm, promptly think A
nPoint is for the point in body zone, by A
N-1, A
N-2, A
N-3Confirm nearly body transition zone quadratic function f2 (Miu) together at 3.
When n=22, satisfy x22-x21＜0.3mm condition in promptly showing, promptly by A21, A20,3 definite equations of A19:
210＝43.9×43.9×d+43.9×e+f
200＝43.5×43.5×d+43.5×e+f
190＝42.6×42.6×d+42.6×e+f
Obtain:
d＝10.6838，e＝-908.7641，f＝19514.8178
Be quadratic function f2 (Miu)=y=10.6838x2-908.7641x+19514.8178
(4) inboard wall of tube body linear function f (d) confirms
According to the coordinate system of setting up, in an An (n＞22), establish straight-line equation at optional 2.Establishing straight-line equation by A23,2 of A28 in the table is f (dou)=x=44.1
Obtain intersecting point coordinate D1 (32.4 according to upset end inwall linear function f (dou) that obtains and nearly upset end transition zone quadratic function f1 (Miu); 63.2); Nearly body transition zone quadratic function f2 (Miu) and inboard wall of tube body linear function f (d) obtain intersecting point coordinate D2 (44.1,216.3).Make D1 and D2 and meet at D1 ' (0,63.2), D2 ' (0,216.3) to the vertical line of Y axle, the distance between D1 ' and the D2 ' is that upset end length of transition zone Miu is 153.1mm in the drilling rod that records.
The measuring method of upset end zone of transition in the drilling rod of the present invention; Can be under the prerequisite of not destroying drilling rod; Through axially using the distance of the measuring sonde of measuring instrument to the drilling rod inwall; Confirm interior upset end zone of transition inwall, inboard wall of tube body and upset end inwall function with the curvilinear regression method, calculate Miu length.Use this method Measuring Time short, easy to operate, accurately and reliably, solved the world-famous puzzle of the on-line Full detection of Miu, have broad application prospects and promotional value.
Claims (4)
1. the measuring method of upset end zone of transition in the drilling rod, it comprises measuring instrument, said measuring instrument comprises gage beam, driving mechanism and control computer, it is characterized in that:
Said measuring method may further comprise the steps:
A, employing measuring instrument are measured every fixed interval step pitch inside pipe wall is axial, and inside pipe wall is to distance value L (L1, the L2 of its axis ...), obtain one group of tube wall point E (E1, the E2 at its axis place relatively simultaneously ...);
B, employing curvilinear regression method are confirmed nearly upset end zone of transition inwall quadratic function f1 (Miu), nearly body zone of transition inwall quadratic function f2 (Miu), upset end inwall linear function f (dou) and inboard wall of tube body linear function f (d);
C, confirm intersection point D1 by nearly upset end zone of transition inwall quadratic function f1 (Miu) and upset end inwall linear function f (dou), nearly body zone of transition inwall quadratic function f2 (Miu) confirms intersection point D2 with inboard wall of tube body linear function f (d);
D, according to two intersection point D1 and D2, confirm that upset end length of transition zone Miu is the distance between some D1 and the D2 in the drilling rod.
2. measuring method according to claim 1 is characterized in that: said gage beam comprises,
Measure casing, its tank wall has the measurement window that supplies light to see through;
The optical frames group is arranged at and measures in the casing, and correspondence is positioned at measurement window, establishes reflecting surface, and this reflecting surface and axis are an angle;
The light source body is arranged at optical frames group one side;
Video camera is arranged at the other side of optical frames group, and the data of gathering are sent to a control computer structure;
Said driving mechanism is connected in gage beam;
Said control computer electrically connects driving mechanism and gage beam respectively.
3. measuring method according to claim 1 is characterized in that: the scope of said fixedly step pitch is 0.5～20mm.
4. measuring method according to claim 1 is characterized in that: the coverage that said measuring instrument axially-movable is measured is from the inside 500mm of pipe end.
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| CN2010102877325A CN102410814A (en) | 2010-09-20 | 2010-09-20 | Method for measuring transition area at thickening end in drill rod |
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|---|---|---|---|
| CN2010102877325A CN102410814A (en) | 2010-09-20 | 2010-09-20 | Method for measuring transition area at thickening end in drill rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269787A (en) * | 2018-10-29 | 2019-01-25 | 上海宝钢包装钢带有限公司 | The online test method of Varying-thickness Automobile Plate |
Citations (4)
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| JPS59102105A (en) * | 1982-12-03 | 1984-06-13 | Toshiba Corp | Device for detecting distance to broken point of power transmission line |
| CN2030648U (en) * | 1987-05-28 | 1989-01-11 | 石油工业部石油专用管材料试验中心 | Optimum structure for thickening transition zone in a drill rod |
| CN201149481Y (en) * | 2007-09-25 | 2008-11-12 | 宝山钢铁股份有限公司 | Device for automatically measuring jackrod inner thickened segment |
| CN201359488Y (en) * | 2008-08-15 | 2009-12-09 | 上海海隆石油管材研究所 | Drill-stem pipe end internal upset transition area measuring instrument |
-
2010
- 2010-09-20 CN CN2010102877325A patent/CN102410814A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59102105A (en) * | 1982-12-03 | 1984-06-13 | Toshiba Corp | Device for detecting distance to broken point of power transmission line |
| CN2030648U (en) * | 1987-05-28 | 1989-01-11 | 石油工业部石油专用管材料试验中心 | Optimum structure for thickening transition zone in a drill rod |
| CN201149481Y (en) * | 2007-09-25 | 2008-11-12 | 宝山钢铁股份有限公司 | Device for automatically measuring jackrod inner thickened segment |
| CN201359488Y (en) * | 2008-08-15 | 2009-12-09 | 上海海隆石油管材研究所 | Drill-stem pipe end internal upset transition area measuring instrument |
Non-Patent Citations (1)
| Title |
|---|
| 魏小楠: "曲线回归分析模型", 《华东公路》, no. 3, 20 June 2008 (2008-06-20) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269787A (en) * | 2018-10-29 | 2019-01-25 | 上海宝钢包装钢带有限公司 | The online test method of Varying-thickness Automobile Plate |
| CN109269787B (en) * | 2018-10-29 | 2020-12-08 | 上海宝钢包装钢带有限公司 | Online detection method for variable-thickness automobile plate |
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Application publication date: 20120411 |