CN104374246A - Internal-thread parameter measuring and calibrating tool for airtight threaded joint - Google Patents
Internal-thread parameter measuring and calibrating tool for airtight threaded joint Download PDFInfo
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- CN104374246A CN104374246A CN201410728341.0A CN201410728341A CN104374246A CN 104374246 A CN104374246 A CN 104374246A CN 201410728341 A CN201410728341 A CN 201410728341A CN 104374246 A CN104374246 A CN 104374246A
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- tight seal
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- parameter measurement
- alignment surface
- screw joint
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Abstract
An internal-thread parameter measuring and calibrating tool for an airtight threaded joint comprises a U-shaped tool body, a threaded reference surface and a bottom surface, wherein the threaded reference surface and the bottom surface are arranged at the top and the bottom of the tool body respectively and are parallel to each other. A connecting line between the center point of the threaded reference surface and the center point of the bottom surface defines a central axis of the tool body. The inner surface of the U-shaped tool body is provided with a groove bottom surface and measuring and calibrating working surfaces symmetric along the central axis, and the threaded reference surface is connected with the groove bottom surface through the measuring and calibrating working surfaces. The internal-thread parameter measuring and calibrating tool for the airtight threaded joint can accurately detect the intermediate diameter of the internal thread and the diameter of a sealing surface at the same time.
Description
Technical field
The invention belongs to fields of measurement, relate to a kind of air-tight seal screw joint inner thread parameter Measurement and calibration instrument, particularly relate to the economical air-tight seal screw joint inner thread parameter Measurement and calibration instrument of a kind of China Midwest oil gas field.
Background technology
Along with going deep into further of natural petroleum gas field, the many middle parts of China and the continuous exploratory development of western oil gas field, in the oil and gas development of Midwest, there is the present situation of the low abundance of hydrocarbon resources, hyposmosis, low output, only have and adopt the pattern of low cost development just can obtain economic benefit.And in industrial gas oil performance history, the tubing and casing adopted twists with screw thread the tubing string connecing and connect to form, screw thread is the weakest link in oil casing, its structural intergrity, sealing integrity and reliability, has a strong impact on safety in production and the tubing string life-span in oil field.Common API screw thread is due to deficiency congenital in structural design own, the sealing integrity in Oil/gas Well environment cannot be met, very easily there is serious oil and gas leakage accident, and at present the widely used Special threading connector of institute due to cost higher, inspection during manufacture requires strict, in addition cannot change general between various button-type, more cannot meet the low cost development strategy of China Midwest " three is low " oil gas field.CNPC Tubular Goods Research Institute is not high for China's Midwest oil gas field environmental requirement, tubing and casing use cost is low, the feature of highly versatile, have developed a kind of economical sealing Special threading connector, while the strength of joint ensureing tubing string and sealing property, reduce factory process difficulty to save production cost, there is highly versatile simultaneously, easily go up/shackle, be convenient to maintenance, feature easy to detect.Sealing threaded connector is different from traditional API screw thread, adopts other screw measuring tools existing on the market cannot detect this screw thread.
Summary of the invention
In order to solve the above-mentioned technical matters existed in background technology, the invention provides a kind of air-tight seal screw joint inner thread parameter Measurement and calibration instrument that simultaneously accurately can detect thread pitch diameter and sealing surface diameter.
Technical solution of the present invention is: the invention provides a kind of air-tight seal screw joint inner thread parameter Measurement and calibration instrument, its special character is: described air-tight seal screw joint inner thread parameter Measurement and calibration instrument comprises overall U-shaped tool body, is separately positioned on the top of tool body and the basic thread face of bottom and bottom surface; Described basic thread face and bottom surface are parallel to each other; Line between described basic thread face central point and bottom center's point forms the axis of tool body; The inside surface of the tool body that described entirety is U-shaped is provided with groove bottom and the Measurement and calibration workplace along axis symmetry; Described basic thread face is connected with groove bottom by Measurement and calibration workplace.
Above-mentioned Measurement and calibration workplace comprises the vertical transition section connected successively, 45 ° of chamferings, central diameter alignment surface, measures divisional plane, 25 ° of transition sections, sphere, sealing alignment surface, circular bead surface and bottom land transition sections; Described basic thread face is connected with vertical transition section; Described bottom land transition section is connected with groove bottom.
Above-mentioned basic thread face and bottom surface are all with vertical transition section and to measure divisional plane vertical.
Form cone angle between above-mentioned central diameter alignment surface and axis, the range of taper of described cone angle is 1:15 ~ 1:17; The scope of the central diameter distance apart from basic thread face in described central diameter alignment surface is 35mm ~ 68mm; In described central diameter alignment surface, the scope of the spacing of the point of both sides line and vertical symmetry position, axis is 136.0mm ~ 138.5mm.
Form cone angle between above-mentioned sealing alignment surface and axis, the range of taper of described cone angle is 1:7.2 ~ 1:8.7; The scope of the central diameter distance apart from basic thread face in described sealing alignment surface is 110.50mm ~ 120.86mm; In described sealing alignment surface, the scope of the spacing of the point of both sides line and vertical symmetry position, axis is 131.75mm ~ 132.50mm.
The radius of above-mentioned sphere is 40 ~ 65mm.
The scope of the width of above-mentioned circular bead surface is 4.1 ~ 5.4mm; The scope of the degree of depth of described circular bead surface is 119.8mm ~ 120.8mm; The maximum gauge of described circular bead surface is 131.2mm ~ 132.5mm.
The altitude range of above-mentioned bottom land transition section is 5 ~ 30mm.
Above-mentioned tool body selects the skin hardness of material to be greater than 60HRC; The surface smoothness of described central diameter alignment surface and sealing alignment surface is all not less than R0.8.
The surfaces externally and internally of above-mentioned tool body is provided with the composite coating for increasing wearing quality.
Advantage of the present invention is:
The invention provides a kind of air-tight seal screw joint inner thread parameter Measurement and calibration instrument, this Measurement and calibration instrument adopts the sealing surface and pitch diameter of thread slope and outside dimension that match with the economical sealing female adapter design parameter of Midwest oil gas field, can accurately measure thread pitch diameter and the sealing surface diameter of the economical sealing thread joint of Midwest oil gas field.Measurement and calibration instrument of the present invention can meet simultaneously measures the sealing surface of internal thread and the requirement of central diameter size, easy to use, measuring accuracy is high, life-span is long, the internal thread machining that can be applicable to the economical sealing thread joint of Midwest oil gas field is preferably measured and inspection, solves the technical matters that existing screw measuring tool and truing tool accurately cannot detect this sealing thread joint.
Accompanying drawing explanation
Fig. 1 is the structural representation of air-tight seal screw joint inner thread parameter Measurement and calibration instrument provided by the present invention;
Wherein:
1-basic thread face; 2-vertical transition section; 3-45 ° of chamfering; 4-central diameter alignment surface; 5-measures divisional plane; 6-25 ° of transition section; 7-sphere; 8-seals alignment surface; 9-circular bead surface; 10-bottom land transition section; 11-groove bottom; 12-tool body; 13-bottom surface; 14-axis.
Embodiment
See Fig. 1, the invention provides the economical sealing thread joint inner thread parameter Measurement and calibration instrument of a kind of Midwest oil gas field, this thread parameter measurement truing tool comprises overall U-shaped tool body 12, tool body 12 inner face both sides are dispersed with symmetrical central diameter alignment surface 4 and sealing alignment surface 8, basic thread faces 1 on the top of tool body 12, basic thread face 1 is parallel with bottom surface 13, and vertical with measuring divisional plane 5 with vertical transition section 2; Be basic thread face 1 from top to bottom respectively at the right side inner face of tool body 12, vertical transition section 2,45 ° of chamferings 3, central diameter alignment surface 4, measure divisional plane 5,25 ° of transition sections 6, sphere 7, sealing alignment surface 8, circular bead surface 9, bottom land transition section 10 and groove bottom 11, sphere 7 with seal that alignment surface 8 is tangent to be connected.
The range of taper that central diameter alignment surface 4 and axis 14 are formed is 1:15 ~ 1:17; The scope of the central diameter distance L3 apart from basic thread face 1 in central diameter alignment surface 4 is 35mm ~ 68mm, and in central diameter alignment surface 4, the scope of the space D 3 of the point of both sides line and vertical symmetry position, axis is 136.0mm ~ 138.5mm.
The range of taper that sealing alignment surface 8 and axis 14 are formed is 1:7.2 ~ 1:8.7, scope apart from the central diameter distance L4 in basic thread face 1 in sealing alignment surface 8 is 110.50mm ~ 120.86mm, in sealing alignment surface 8, the scope of the space D 2 of the point of both sides line and vertical symmetry position, axis is 131.75mm ~ 132.50mm, and the radius R 1 of sphere 7 is 40 ~ 65mm.
The scope of the width D 4 of circular bead surface 9 is 4.1 ~ 5.4mm, the scope of degree of depth L1 is 119.8mm ~ 120.8mm, the maximum dimension D 1 of circular bead surface 9 is the height L2 scope of 131.2mm ~ 132.5mm bottom land transition section 10 is 5 ~ 30mm, and the L2 reason chosen in a big way to use rifle cone type sealed face measuring apparatus and extension bar type sealing surface measuring instrument.
Selected by thread parameter measurement truing tool, the skin hardness of material need be greater than 60HRC, and the surface smoothness of central diameter alignment surface 4 and sealing alignment surface 8 reaches more than R0.8.
Thread parameter measurement truing tool outside surface can arrange composite coating to increase wearing quality.
Embodiment 1
According to oil gas field economical sealing inner thread parameter Measurement and calibration instrument in a kind of Midwest prepared by the present invention, this Measurement and calibration instrument comprises tool body 12, tool body 12 inner face both sides are dispersed with symmetrical central diameter alignment surface 4 and sealing alignment surface 8, basic thread faces 1 on the top of tool body 12, basic thread face 1 is parallel with bottom surface 13, and vertical with measuring divisional plane 5 with vertical transition section 2; Be basic thread face 1 from top to bottom respectively at the right side inner face of tool body 12, vertical transition section 2,45 ° of chamferings 3, central diameter alignment surface 4, measure divisional plane 5,25 ° of transition sections 6, sphere 7, sealing alignment surface 8, circular bead surface 9, bottom land transition section 10 and groove bottom 11, sphere 7 with seal that alignment surface 8 is tangent to be connected.
The tapering that central diameter alignment surface 4 of the present invention and axis 14 are formed is 1:16; When central diameter alignment surface 4 is 52.58mm apart from the distance L3 in basic thread face 1, in central diameter alignment surface 4, the space D 3 of the point of both sides line and vertical symmetry position, axis is 136.96mm.
It is 1:7.5 that the present invention seals the range of taper that alignment surface 8 and axis 14 form, when sealing alignment surface 8 is 114.16mm apart from the distance L4 in basic thread face 1, in sealing alignment surface 8, the space D 2 of the point of both sides line and vertical symmetry position, axis is 131.96mm, and the radius R 1 of sphere 7 is 55mm.
The width D 4 of circular bead surface 9 of the present invention is 5.36mm, and degree of depth L1 is 120.8mm, and the maximum dimension D 1 of circular bead surface 9 is 132.3mm, and the height L2 scope of bottom land transition section 10 is 6mm, and now survey instrument can use rifle cone type sealed face measuring apparatus to measure sealing surface.
Selected by thread parameter measurement truing tool, the skin hardness of material is 60HRC, and the surface smoothness of central diameter alignment surface 4 and sealing alignment surface 8 reaches R0.8, and Measurement and calibration tool exterior surface is provided with composite coating increases wearing quality.
Certain Midwest oil gas field economical thread seal face of 5.5 inches of external diameter hermetic seal casing couplings and the measurement requirement of central diameter size can be met with this internal thread Measurement and calibration instrument simultaneously, easy to use, measuring accuracy is high, life-span is long, and western oil gas field satisfies the demands in using with the externally threaded in-process measurement of economical sealing and inspection hereinto.
Claims (10)
1. an air-tight seal screw joint inner thread parameter Measurement and calibration instrument, it is characterized in that: described air-tight seal screw joint inner thread parameter Measurement and calibration instrument comprises overall U-shaped tool body, be separately positioned on the top of tool body and the basic thread face of bottom and bottom surface; Described basic thread face and bottom surface are parallel to each other; Line between described basic thread face central point and bottom center's point forms the axis of tool body; The inside surface of the tool body that described entirety is U-shaped is provided with groove bottom and the Measurement and calibration workplace along axis symmetry; Described basic thread face is connected with groove bottom by Measurement and calibration workplace.
2. air-tight seal screw joint inner thread parameter Measurement and calibration instrument according to claim 1, is characterized in that: described Measurement and calibration workplace comprises the vertical transition section connected successively, 45 ° of chamferings, central diameter alignment surface, measures divisional plane, 25 ° of transition sections, sphere, sealing alignment surface, circular bead surface and bottom land transition sections; Described basic thread face is connected with vertical transition section; Described bottom land transition section is connected with groove bottom.
3. according to the air-tight seal screw joint inner thread parameter Measurement and calibration instrument that claim 2 is wet wet, it is characterized in that: described basic thread face and bottom surface are all with vertical transition section and to measure divisional plane vertical.
4. the air-tight seal screw joint inner thread parameter Measurement and calibration instrument according to Claims 2 or 3, it is characterized in that: form cone angle between described central diameter alignment surface and axis, the range of taper of described cone angle is 1:15 ~ 1:17; The scope of the central diameter distance apart from basic thread face in described central diameter alignment surface is 35mm ~ 68mm; In described central diameter alignment surface, the scope of the spacing of the point of both sides line and vertical symmetry position, axis is 136.0mm ~ 138.5mm.
5. air-tight seal screw joint inner thread parameter Measurement and calibration instrument according to claim 4, it is characterized in that: form cone angle between described sealing alignment surface and axis, the range of taper of described cone angle is 1:7.2 ~ 1:8.7; The scope of the central diameter distance apart from basic thread face in described sealing alignment surface is 110.50mm ~ 120.86mm; In described sealing alignment surface, the scope of the spacing of the point of both sides line and vertical symmetry position, axis is 131.75mm ~ 132.50mm.
6. air-tight seal screw joint inner thread parameter Measurement and calibration instrument according to claim 5, is characterized in that: the radius of described sphere is 40 ~ 65mm.
7. air-tight seal screw joint inner thread parameter Measurement and calibration instrument according to claim 6, is characterized in that: the scope of the width of described circular bead surface is 4.1 ~ 5.4mm; The scope of the degree of depth of described circular bead surface is 119.8mm ~ 120.8mm; The maximum gauge of described circular bead surface is 131.2mm ~ 132.5mm.
8. air-tight seal screw joint inner thread parameter Measurement and calibration instrument according to claim 7, is characterized in that: the altitude range of described bottom land transition section is 5 ~ 30mm.
9. air-tight seal screw joint inner thread parameter Measurement and calibration instrument according to claim 8, is characterized in that: described tool body selects the skin hardness of material to be greater than 60HRC; The surface smoothness of described central diameter alignment surface and sealing alignment surface is all not less than R0.8.
10. air-tight seal screw joint inner thread parameter Measurement and calibration instrument according to claim 9, is characterized in that: the surfaces externally and internally of described tool body is provided with the composite coating for increasing wearing quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410728341.0A CN104374246A (en) | 2014-12-03 | 2014-12-03 | Internal-thread parameter measuring and calibrating tool for airtight threaded joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410728341.0A CN104374246A (en) | 2014-12-03 | 2014-12-03 | Internal-thread parameter measuring and calibrating tool for airtight threaded joint |
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| CN104374246A true CN104374246A (en) | 2015-02-25 |
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| CN201410728341.0A Pending CN104374246A (en) | 2014-12-03 | 2014-12-03 | Internal-thread parameter measuring and calibrating tool for airtight threaded joint |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4965937A (en) * | 1988-09-30 | 1990-10-30 | Hill Tom H | Tool joint gauge |
| CN201348484Y (en) * | 2009-01-15 | 2009-11-18 | 宝山钢铁股份有限公司 | Tubing and casing coupling master gage |
| CN201535657U (en) * | 2009-11-12 | 2010-07-28 | 无锡西姆莱斯石油专用管制造有限公司 | Thread connector inner sealing taper surface diameter measuring device |
| CN202947632U (en) * | 2012-12-12 | 2013-05-22 | 衡阳华菱钢管有限公司 | Combined calibrating gauge for measuring pitch diameter of thread and sealing face of special female adapter |
| CN204329797U (en) * | 2014-12-03 | 2015-05-13 | 西安三环科技开发总公司 | Air-tight seal screw joint inner thread parameter Measurement and calibration instrument |
-
2014
- 2014-12-03 CN CN201410728341.0A patent/CN104374246A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4965937A (en) * | 1988-09-30 | 1990-10-30 | Hill Tom H | Tool joint gauge |
| CN201348484Y (en) * | 2009-01-15 | 2009-11-18 | 宝山钢铁股份有限公司 | Tubing and casing coupling master gage |
| CN201535657U (en) * | 2009-11-12 | 2010-07-28 | 无锡西姆莱斯石油专用管制造有限公司 | Thread connector inner sealing taper surface diameter measuring device |
| CN202947632U (en) * | 2012-12-12 | 2013-05-22 | 衡阳华菱钢管有限公司 | Combined calibrating gauge for measuring pitch diameter of thread and sealing face of special female adapter |
| CN204329797U (en) * | 2014-12-03 | 2015-05-13 | 西安三环科技开发总公司 | Air-tight seal screw joint inner thread parameter Measurement and calibration instrument |
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Application publication date: 20150225 |