CN101898265B - Method for processing and measuring pitch diameter changing thread - Google Patents
Method for processing and measuring pitch diameter changing thread Download PDFInfo
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- CN101898265B CN101898265B CN2010102203089A CN201010220308A CN101898265B CN 101898265 B CN101898265 B CN 101898265B CN 2010102203089 A CN2010102203089 A CN 2010102203089A CN 201010220308 A CN201010220308 A CN 201010220308A CN 101898265 B CN101898265 B CN 101898265B
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Abstract
The invention provides a method for processing and measuring a pitch diameter changing thread joint. In the processing method, a thread joint is processed by adopting a digital control machine tool; the pitch diameter change is expressed at the coupling end for increasing interference after a coupling and an oil sleeve are screwed; the thread pitch diameter is changed in the design position of the coupling end in processing; the pitch diameter is reduced to an appointed value at the coupling end; then, a specified length is processed; and the pitch diameter is increased to a normal value. In the measuring method, by adopting a comparative measurement method, a complete thread processed at the oil sleeve end having same specification with the coupling end is connected with a gauge head as a measuring tool, and the change of thread height at different positions are compared; a pitch diameter changing value of the coupling end is measured; and the part with a changing value approaching zero is a normal thread part. The invention has the advantage of integrating the seal part to the joint of the thread by adopting a pitch diameter changing method in the processing and measurement and being capable of improving the processing efficiency and the yield just by processing once. By adopting the oil sleeve with corresponding specification as the measuring tool for carrying out comparative measurement, the method is simple and convenient, and the operation is convenient.
Description
Technical field
The present invention relates to a kind of screw thread processing of change footpath and the method for measuring that is used for the oil well pipe joint.
Background technology
At the general nipple that uses of oil well pipe is round thread and the buttress thread that satisfies API 5B, development along with industrial gas oil, the particularly continuous deterioration of mining environment, the performance requirement of new designs of threaded joints is more and more higher, and the demand that non-API nipple is special buckle product is increasing.Divide two parts as special snapping is first: threaded portion and hermetic unit.Wherein threaded portion provides the function that is threaded, and hermetic unit provides sealing property.In API screw thread and general special snapping head thread, its pitch diameter of thread all is constant.Except the special snapping head of above-mentioned screw thread and hermetic unit, in some special thread joint, can make screw thread realize gas sealing ability by adjusting the middle footpath value of a tooth or polydonita.Add man-hour at these special thread joints, need double thread to carry out and directly process in the change and measure.In the general in addition special snapping head, threaded portion and hermetic unit are separate machined, and hermetic unit is integrated into to add on the screw thread only needs time processing to get final product man-hour, do not need to process in addition hermetic unit, can save time, reduce the processing number of times, improve working (machining) efficiency and processing lumber recovery.In the patent of being retrieved at present, also do not mention footpath processing method in the change of oil well pipe thread.
Summary of the invention
At the problem that exists in the above-mentioned technology, the invention provides a kind of directly screw thread processing and the method for measuring of change that is used for the oil well pipe joint, to realize the processing of footpath screw thread in the change, reach the purpose of machining screw seal nipple.
For achieving the above object, the technical solution used in the present invention is to propose the processing of the nipple in footpath in a kind of change the and the method for measurement, and this method comprises processing method and measuring method:
Processing method: adopt Digit Control Machine Tool processing, the present coupling end of middle footpath change list, to increase the interference behind the button on box cupling and the tubing and casing, design attitude at coupling end in the processing changes the pitch diameter of thread, its processing method is that designated value was arrived in the footpath during coupling end reduced earlier, the length of processing regulation then is increased to normal value with middle footpath again;
Measuring method: adopt to compare and measure method, connect gauge outfit with complete thread and make measurer with the processing of coupling end same specification oil jacket pipe end, the middle footpath changing value of coupling end is measured in the variation of contrast diverse location screw thread tooth depth, and changing value is normal threaded portion near 0.
Effect of the present invention is that routing method was integrated into the joint of screw thread with hermetic unit during in-process measurement adopt to become, owing to only need time processing, can improve working (machining) efficiency and lumber recovery.The tubing and casing of employing corresponding specification is made measurer and is compared measurement, and method is easy, and is easy to operate.
Description of drawings
Fig. 1 is a process schematic diagram of the present invention;
Fig. 2 is a measuring method schematic diagram of the present invention.
The gauge outfit of A, box cupling B, measurement
The specific embodiment
Reaching embodiment in conjunction with the accompanying drawings is illustrated the processing of footpath screw thread and the method for measurement in the change of the present invention.
The processing of the nipple in footpath and the method for measurement in the change of the present invention, this method comprises processing method and measuring method:
Processing method: adopt Digit Control Machine Tool processing, the present coupling end of middle footpath change list, to increase the interference behind the button on box cupling and the tubing and casing, design attitude at coupling end in the processing changes the pitch diameter of thread, its processing method is that designated value was arrived in the footpath during coupling end reduced earlier, the length of processing regulation then is increased to normal value with middle footpath again;
Measuring method: adopt to compare and measure method, connect gauge outfit with complete thread and make measurer with the processing of coupling end same specification oil jacket pipe end, the middle footpath changing value of coupling end is measured in the variation of contrast diverse location screw thread tooth depth, and changing value is normal threaded portion near 0.
Processing method: adopt Digit Control Machine Tool processing, the present coupling end of middle footpath change list, design attitude at coupling end in the processing changes the pitch diameter of thread, to increase the interference behind the button on box cupling and the tubing and casing, its processing method is that designated value was arrived in the footpath during coupling end reduced earlier, in the footpath excursion be 0.1mm to 0.5mm, the length of processing regulation is increased to normal value with middle footpath more then; In the described processing designated value is arrived in footpath in the reduction earlier of footpath in the coupling end, the axial excursion that changes to footpath in the appointment is that 0.5 tooth is to 2 teeth, then in the editing objective footpath needed length, describedly middle footpath is increased to normal value, change to normal in the axial excursion in footpath be 0.5 tooth to 2 teeth, middle footpath variation pattern is a linear change.
Measuring method: adopt to compare and measure method, connect gauge outfit with complete thread and make measurer, contrast the variation of diverse location screw thread tooth depth, determine the variable quantity of middle footpath change location, measure the middle footpath changing value of coupling end with the processing of coupling end same specification oil jacket pipe end.
The processing of the nipple in footpath and the method for measurement are achieved in that in the change of the present invention
Method for processing:
The processing of employing Digit Control Machine Tool.Footpath processing is on box cupling in the change.Its coupling end variation pattern is to be varied down to footpath in the target earlier, the axial excursion that changes to footpath in the appointment is that 0.5 tooth is to 2 teeth, the needed length in footpath in the editing objective then, become greater to again normal in the footpath, change to normal in the axial excursion in footpath be that 0.5 tooth is to 2 teeth.In the footpath variation pattern for being generally linear change, also can be other modes, as the conic section transition etc.
With external diameter 244.48mm, wall thickness 13.84mm, the sleeve pipe of per inch 4 teeth is an example, wherein the footpath changes the middle path position of processing on box cupling, be designed to apart from coupling face 11～14 teeth, variation pattern is a linear change, the axial excursion that changes to footpath in the appointment is 6.35～12.7mm, promptly 1 tooth is to 2 teeth, the footpath reduces length-specific 0.1～0.2mm on initial variation tooth, processes length-specific 5.08～6.35mm then, and linear change is to normal middle footpath again, the axial excursion that changes to normal middle footpath is 6.35～12.7mm, and promptly 1 tooth is to 2 teeth.
The method of measuring does not have measurer the part mark of variation zero earlier in middle footpath, measure the part that the footpath changes in the coupling end then, and its meter sense is middle footpath changing value.With external diameter 244.48mm, the sleeve pipe of wall thickness 13.84mm is an example, getting corresponding body complete thread partly connects gauge outfit and makees measurer, measure the variation of collar segments tooth depth, its changing value is processing part, footpath in the change in the part of negative sense length-specific 0.1～0.2mm, negative sense change less than this value be from normal footpath change to specific in directly position, changing value is normal threaded portion near 0.
Claims (2)
1. the processing of the nipple in footpath and the method for measurement in the change, this method comprises processing method and measuring method:
Processing method: adopt Digit Control Machine Tool processing, the present coupling end of middle footpath change list, to increase the interference behind the button on box cupling and the tubing and casing, design attitude at coupling end in the processing changes the pitch diameter of thread, its processing method is that designated value was arrived in the footpath during coupling end reduced earlier, the length of processing regulation then is increased to normal value with middle footpath again;
Measuring method: adopt to compare and measure method, connect gauge outfit with complete thread and make measurer with the processing of coupling end same specification oil jacket pipe end, the middle footpath changing value of coupling end is measured in the variation of contrast diverse location screw thread tooth depth, and changing value is normal threaded portion near 0.
2. the method for processing according to claim 1 and measurement, it is characterized in that: in the described processing designated value is arrived in footpath in the reduction earlier of footpath in the coupling end, axially excursion is that 0.5 tooth is to 2 teeth, then in the editing objective footpath needed length, describedly middle footpath is increased to normal value, axially excursion be 0.5 tooth to 2 teeth, middle footpath variation pattern is a linear change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102203089A CN101898265B (en) | 2010-08-16 | 2010-08-16 | Method for processing and measuring pitch diameter changing thread |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102203089A CN101898265B (en) | 2010-08-16 | 2010-08-16 | Method for processing and measuring pitch diameter changing thread |
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| Publication Number | Publication Date |
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| CN101898265A CN101898265A (en) | 2010-12-01 |
| CN101898265B true CN101898265B (en) | 2011-11-16 |
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| CN2010102203089A Active CN101898265B (en) | 2010-08-16 | 2010-08-16 | Method for processing and measuring pitch diameter changing thread |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717156A (en) * | 2012-06-15 | 2012-10-10 | 天津钢管集团股份有限公司 | One-step forming machining method for threaded single tool with double wiring pipes for connecting oil well pipes |
| CN103542535A (en) * | 2013-10-18 | 2014-01-29 | 天津东义镁制品股份有限公司 | Airtight seal thread structure of magnesium alloy sacrificial anode for water heater |
| CN112577389B (en) * | 2021-01-15 | 2022-09-27 | 江花集团有限公司 | High check out test set of batch gear tooth |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1240928C (en) * | 2001-06-07 | 2006-02-08 | 天津钢管有限责任公司 | Variable-thread connecting hoop |
| CN2628707Y (en) * | 2003-06-27 | 2004-07-28 | 宝山钢铁股份有限公司 | Oil well pipe screwed joints |
| CN100474189C (en) * | 2007-03-15 | 2009-04-01 | 天津钢管集团股份有限公司 | Threading machine cycle processing method for turning hook-tooth thread |
| CN101144372A (en) * | 2007-10-15 | 2008-03-19 | 无锡西姆莱斯石油专用管制造有限公司 | Sticking-resistant petroleum sleeve joint |
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| CN101898265A (en) | 2010-12-01 |
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Effective date of registration: 20190627 Address after: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Patentee after: Tianjin Steel Tube Manufacturing Co., Ltd. Address before: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Patentee before: Tianjin Steel Pipe Group Co., Ltd. |