CN202452913U - Internal thread standoff plug gauge of air-tight seal nipple for low-pressure gas field - Google Patents
Internal thread standoff plug gauge of air-tight seal nipple for low-pressure gas field Download PDFInfo
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- CN202452913U CN202452913U CN2011205516136U CN201120551613U CN202452913U CN 202452913 U CN202452913 U CN 202452913U CN 2011205516136 U CN2011205516136 U CN 2011205516136U CN 201120551613 U CN201120551613 U CN 201120551613U CN 202452913 U CN202452913 U CN 202452913U
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- tight seal
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Abstract
The utility model relates to an internal thread standoff plug gauge of an air-tight seal nipple for a low-pressure gas field. The plug gauge comprises a thread gauge, external thread parameters of the thread gauge match with design parameters of the internal thread of the air-tight seal nipple for the low-pressure gas field, four oil cuttings grooves extending axially are evenly distributed on the outer thread of the thread gauge, and one of the oil cuttings grooves is located at a start point of a complete thread section at the large end of the thread gauge. According to the plug gauge, the technical problem that the existing thread gauges cannot measure the internal thread standoff of the air-tight seal nipple for the low-pressure gas field accurately and conveniently is solved, measuring results are stable and reliable, and the plug gauge is suitable for field measurement.
Description
Technical field
The utility model belongs to oil, Gas Industry oil well pipe thread parameter measuring technical field, is specifically related to a kind of air-tight seal screw joint internal thread standoff and measures feeler gauge.
Background technology
In oil, the construction of natural gas fields, the sleeve pipe that is adopted is the string of casing that is connected to form by threaded connector, and threaded connector is the weakest link in the tubing string, and its structural intergrity, sealing integrity and reliability have a strong impact on the safety in production and the tubing string life-span in oil field.For the low pressure gas field, employed sleeve pipe must satisfy its switching performance, and lower production cost is arranged again.To the double requirements of Oilfield Company to sleeve pipe reliability and economy; CNPC Tubular Goods Research Institute develops a kind of low pressure gas field of screw thread transition structure form and uses sealing adaptor; In strength of joint that has guaranteed tubing string and sealing property; Reduce the factory process difficulty again, practiced thrift production cost.This low pressure gas field is to guarantee the safe and reliable important step of string of casing with the measurement of air-tight seal screw joint inner thread parameter.Because the singularity of this joint inner thread parameter needs to measure the internal thread standoff, still, existing thread profile gauge can not accurately be convenient for measuring this special joint internal thread standoff.Therefore, need a kind of gauge that accurately is convenient for measuring this internal thread standoff.
Summary of the invention
The utility model purpose provides a kind of measurement feeler gauge that can measure the low pressure gas field with air-tight seal screw joint internal thread standoff, and it has solved existing thread profile gauge can not accurately be convenient for measuring the technical matters of low pressure gas field with air-tight seal screw joint internal thread standoff.
The technical solution of the utility model is:
Feeler gauge is measured with air-tight seal screw joint internal thread standoff in a kind of low pressure gas field, comprises thread profile gauge 1; Its special character is: the external thread parameter of said thread profile gauge 1 and low pressure gas field are complementary with the internal thread design parameter of air-tight seal screw joint; Be evenly equipped with four axially extended oil bits grooves 4 on the external thread of said thread profile gauge 1, and one of them oil bits groove is positioned at the big end complete thread of thread profile gauge starting point; The opening angle a of said oil bits groove is 60 ± 3 °, and groove depth h is 3 ± 0.5mm.
The external thread parameter of above-mentioned thread profile gauge 1 is: loading end angle [alpha]=3 °～30 °; Spigot surface angle beta=30 °～45 °, arc radius R=0.38mm～0.42mm at the bottom of the tooth, the wide B1=1.3mm～1.5mm of alveolus; Wide B2=1.6mm～the 1.8mm of dental ridge; High H=1.9mm～the 2.2mm of tooth, pitch N are per inch 6 teeth～per inch 8 teeth, and internal thread becomes awl O and is 67mm/m～73mm/m.
Above-mentioned low pressure gas field is measured feeler gauge with the air-tight seal screw joint inner thread parameter and is comprised that also two are tightened handle 2; Tighten handle 2 symmetries and be installed in the big end of thread profile gauge 1 end face for said two.
Above-mentioned thread profile gauge 1 is a hollow structure.
The technique effect that the utlity model has is:
1, the utility model adopts the thread profile gauge parameter that is complementary with air-tight seal screw joint internal thread design parameter with the low pressure gas field, can measure the internal thread standoff of low pressure gas field with air-tight seal screw joint accurately and conveniently.
2, the utility model is easy to use, and measurement result is reliable and stable, and can be applicable to on-the-spot the detection preferably.
Description of drawings
Fig. 1 is feeler gauge is measured in the utility model low pressure gas field with air-tight seal screw joint internal thread standoff a structural representation;
Fig. 2 is a C-C partial sectional view among Fig. 1, i.e. the structural representation of oil bits groove;
Fig. 3 is the structural drawing of the measured low pressure gas field of the utility model ring gauge with the hermetic seal male connection;
Fig. 4 be with the low pressure gas field with the structural drawing of the corresponding low pressure of hermetic seal male connection gas field with the hermetic seal female adapter;
Wherein: the 1-thread profile gauge; 2-tightens handle; The 3-external thread; 4-oil bits groove; A-oil bits channel opening angle, h-oil bits groove depth, α-loading end angle, β-spigot surface angle, R-tooth top (end) arc radius, the B1-alveolus is wide, and the B2-dental ridge is wide, and the H-tooth is high, and the O-internal thread becomes awl.
Embodiment
As shown in Figure 1, the utility model comprises that a thread profile gauge 1, two tighten handle 2, and thread profile gauge 1 big end end face has the threaded hole of two symmetrical distributions, tightens in the threaded hole that handle 2 is installed in big end end face for two.The external thread parameter of thread profile gauge 1 and low pressure gas field are complementary with the internal thread design parameter of air-tight seal screw joint; The external thread of thread profile gauge 1 has four oil bits grooves 4 that are uniformly distributed with, and one of them must be positioned at big end complete thread starting point.The opening angle a of oil bits groove is 60 ± 3 °, and groove depth h is 3 ± 0.5mm.Thread profile gauge 1 inside is preferably hollow, can effectively alleviate the weight of plug thread gauge.
During measurement, with thread profile gauge 1 through spanner or tighten on the internal thread that handle 2 tightens to the measured sleeve tubing string.After tightening, use pit gauge measurement big end end face of thread profile gauge and box face, be institute's survey sleeve pipe internal thread standoff value apart from S1.The design ideal value of sleeve pipe internal thread standoff S1 can be consulted the low pressure gas field with air-tight seal screw joint thread parameter standard, can confirm through the size of contrast S1 whether institute's survey sleeve pipe internal thread standoff parameter is qualified.
Referring to Fig. 3, the hermetic seal male connection is used in a kind of low pressure gas field, and the resistance to tension behind the last button has been improved in loading end angle [alpha]=3 °～30 °; Spigot surface angle beta=30 °～45 °, the button guiding is stable in the assurance; Tooth top circular arc radius R=0.38mm～0.42mm has the auxiliary seal effect simultaneously at anti-stick button; Wide B1=1.3mm～the 1.5mm of alveolus is prone to make-up when detaining in the assurance thread alternating does not take place; Wide B2=1.6mm～the 1.8mm of dental ridge, button back loading end contacts with spigot surface in the assurance; High H=1.9mm～the 2.2mm of tooth has improved tensile strength; Pitch N is per inch 6 teeth～8 teeth, the intensity in the assurance under button and the tensile load.During practical implementation, can select this special thread sleeve pipe of different size for use according to the requirement of concrete operating mode.Adopt and the same processing technology of API screw thread during manufacturing.Wherein box cupling and body be with a grade of steel or a high grade of steel, on when detaining two ends evenly smear the API thread compound, clamping box cupling middle part, factory's end adopts on the peak torque to be detained, on-the-spot end adopts on the best torque to be detained.
Referring to Fig. 4, the hermetic seal female adapter is used in a kind of low pressure gas field, and the resistance to tension behind the last button has been improved in loading end angle [alpha]=3 °～30 °; Spigot surface angle beta=30 °～45 °, the button guiding is stable in the assurance; Arc radius R=0.38mm～0.42mm at the bottom of the tooth has the auxiliary seal effect simultaneously at anti-stick button; Wide B1=1.3mm～the 1.5mm of alveolus is prone to make-up when detaining in the assurance thread alternating does not take place; Wide B2=1.6mm～the 1.8mm of dental ridge, button back loading end contacts with spigot surface in the assurance; High H=1.9mm～the 2.2mm of tooth has improved tensile strength; Pitch N is per inch 6 teeth～per inch 8 teeth, the intensity in the assurance under button and the tensile load; Referring to Fig. 4, internal thread becomes awl O and is 67mm/m～73mm/m, forms effective sealed engagement.During practical implementation, can select this special thread sleeve pipe of different size for use according to the requirement of concrete operating mode.Adopt and the same processing technology of API screw thread during manufacturing.Wherein box cupling and body be with a grade of steel or a high grade of steel, internal thread phosphatization thickness >=20um, on when detaining two ends evenly smear the API thread compound, clamping box cupling middle part, factory's end adopts on the peak torque to be detained, on-the-spot end adopts on the best torque to be detained.
Claims (4)
1. feeler gauge is measured with air-tight seal screw joint internal thread standoff in a low pressure gas field, comprises thread profile gauge (1); It is characterized in that: the external thread parameter of said thread profile gauge (1) and low pressure gas field are complementary with the internal thread design parameter of air-tight seal screw joint; Be evenly equipped with four axially extended oil bits grooves (4) on the external thread of said thread profile gauge (1), and one of them oil bits groove is positioned at the big end complete thread of thread profile gauge starting point; The opening angle (a) of said oil bits groove is 60 ± 3 °, and groove depth (h) is 3 ± 0.5mm.
2. feeler gauge is measured with the air-tight seal screw joint inner thread parameter in low pressure according to claim 1 gas field; It is characterized in that: the external thread parameter of said thread profile gauge (1) is: loading end angle (α)=3 °～30 °; Spigot surface angle (β)=30 °～45 °, arc radius at the bottom of the tooth (R)=0.38mm～0.42mm, wide (B1)=1.3mm～1.5mm of alveolus; Wide (B2)=1.6mm～1.8mm of dental ridge; High (H)=1.9mm～2.2mm of tooth, pitch is per inch 6 teeth～per inch 8 teeth, internal thread becomes awl (O) and is 67mm/m～73mm/m.
3. feeler gauge is measured with the air-tight seal screw joint inner thread parameter in low pressure according to claim 1 and 2 gas field, it is characterized in that: comprise that also two are tightened handle (2); Tighten handle (2) symmetry and be installed in thread profile gauge (1) end face greatly for said two.
4. feeler gauge is measured with the air-tight seal screw joint inner thread parameter in low pressure according to claim 3 gas field, and it is characterized in that: said thread profile gauge (1) is a hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205516136U CN202452913U (en) | 2011-12-19 | 2011-12-19 | Internal thread standoff plug gauge of air-tight seal nipple for low-pressure gas field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205516136U CN202452913U (en) | 2011-12-19 | 2011-12-19 | Internal thread standoff plug gauge of air-tight seal nipple for low-pressure gas field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202452913U true CN202452913U (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205516136U Expired - Fee Related CN202452913U (en) | 2011-12-19 | 2011-12-19 | Internal thread standoff plug gauge of air-tight seal nipple for low-pressure gas field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202452913U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394774A (en) * | 2013-07-30 | 2013-11-20 | 无锡西姆莱斯石油专用管制造有限公司 | Method for repairing small standoff during on-line oil sleeve external thread production |
-
2011
- 2011-12-19 CN CN2011205516136U patent/CN202452913U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394774A (en) * | 2013-07-30 | 2013-11-20 | 无锡西姆莱斯石油专用管制造有限公司 | Method for repairing small standoff during on-line oil sleeve external thread production |
| CN103394774B (en) * | 2013-07-30 | 2015-08-05 | 无锡西姆莱斯石油专用管制造有限公司 | The restorative procedure that during online production tubing and casing external screw thread, compact distance is less than normal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20131219 |