CN206753508U - A kind of horizontal well and extended reach well nipple - Google Patents
A kind of horizontal well and extended reach well nipple Download PDFInfo
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- CN206753508U CN206753508U CN201720139326.1U CN201720139326U CN206753508U CN 206753508 U CN206753508 U CN 206753508U CN 201720139326 U CN201720139326 U CN 201720139326U CN 206753508 U CN206753508 U CN 206753508U
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- screw thread
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- internal thread
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Abstract
A kind of nipple is the utility model is related to, specifically a kind of horizontal well and extended reach well nipple, belongs to oil bushing threaded connector technical field.It includes box cupling and body, and torque shoulder is reverse shoulder structure, and reverse shoulder end face is connected to form wedge structure with screw thread loading end；Body is provided with smooth end face close to box cupling one end, and smooth end face forms axial interference fit with torque shoulder；Conical bore is provided between the torque shoulder and internal thread of box cupling, circular conical surface is provided between the external screw thread and smooth end face of body, circular conical surface forms radial interference fit with conical bore.Torque shoulder of the present utility model is arranged to reverse shoulder, and internal and external threads are barb-shaped structure, reverse circular bead surface and screw thread loading end composition wedge structure, significantly enhance the bulk strength and bending resistance of joint；The main seal structure of circular conical surface and conical bore, and by the use of internal thread alveolus as thread compound holding tank, ensure distribution of contact stable on sealing surface, strengthen sealing effectiveness.
Description
Technical field
A kind of nipple is the utility model is related to, specifically a kind of horizontal well and extended reach well nipple,
Belong to oil bushing threaded connector technical field.
Background technology
For the tubing and casing of split quarry oil, natural gas, jointing is most weak link, and many failures all occur
Joint area.In order to solve the Problem of Failure of tubing and casing jointing, technical staff has paid very big effort, it is proposed that a lot
Solution.But with the progress of drilling technology, mining depth is more and more deeper, downhole temperature, pressure more and more higher, current skill
Art still can not fully meet requirement, and new technology and new joint form continuously emerge.
At present, the joint that tubing and casing uses is typically API nipples.API joints are a kind of joints having standardized, and are pressed
Fabricated according to API standard.Its shortcoming is：1）Screw thread form is round thread or buttress thread.The carrying face angle of round thread and
It is all 30 ° to be oriented to face angle, and bonding strength is low.Buttress thread carrying face angle is 3 °, and bonding strength increases, but sealing property
Difference.2）Gap be present between engagement screw thread, sealing property is unreliable.Disadvantages mentioned above, this screw thread be present just because of API screw threads
It is easy to that failure accidents occur.Moreover, API screw thread bending resistances are poor, under the harsh drilling condition such as horizontal well, extended reach well
Requirement can not be met during use.
Therefore, researcher has designed and developed various Special threading connectors.Find by prior art documents, in
State's patent publication No. is CN 2575286Y, and publication date is September in 2003 24, utility model patent entitled " oil, sleeve pipe spiral shell
Line joint ", the patent are improved API joints.The structure is connected through a screw thread by external thread piece and inner thread piece and formed：
Its screw thread remains as buttress thread, but sets a column sealed face in outer flighting front end, is accordingly engaged in internal thread
Position sets a raised sphere primary sealing area, and column sealed face forms main seal portion with raised sphere.Meanwhile by external screw thread
Part front end changes into -9 ° or -15 ° of angles, and secondary sealing part is formed with -9 ° of inner thread piece or -15 ° of shoulder interference fits.Should
Joint adds main seal structure and secondary sealing structure, thus sealing property strengthens, but screw thread carrying face angle, the spigot surface of joint
Angle is all identical with API buttress threads, therefore, the bending resistance deficiency of joint.
The content of the invention
In place of the purpose of this utility model is to overcome above-mentioned deficiency, so as to provide a kind of horizontal well and extended reach well spiral shell
Line joint, improve bending resistance and gas sealing ability, and detection easy to process.
According to technical scheme provided by the utility model, a kind of horizontal well and extended reach well with nipple include box cupling and
Body, box cupling medial center are provided with torque shoulder, the symmetrical setting internal thread in the torque shoulder left and right sides, and tube surfaces are provided with
External screw thread, box cupling and body are linked into an integrated entity by internal thread and external screw thread, it is characterized in that：Torque shoulder is reverse shoulder knot
Structure, reverse shoulder end face are connected to form wedge structure with screw thread loading end；Body is provided with smooth end face close to box cupling one end, smooth
End face forms axial interference fit with torque shoulder；Be provided with conical bore between the torque shoulder and internal thread of box cupling, body it is outer
Circular conical surface is provided between screw thread and smooth end face, circular conical surface forms radial interference fit with conical bore；The internal thread and circle of box cupling
Cylindrical hole is provided between taper hole, guide surface is provided between the external screw thread and circular conical surface of body, cylindrical hole connects to be formed with guide surface
Gap coordinates；Thread compound storage chamber is formed between the internal thread and cylindrical hole.
Further, internal thread and external screw thread are reverse-hook shape structure, internal thread and externally threaded loading end angle [alpha]=- 1
~-3.5 °, spigot surface angle beta=10~25 °, high h1=0.72 of external screw thread tooth~1.58mm, the high h2=h1+ of tooth of internal thread
0.20mm。
Further, the shoulder angle γ=15 ± 0.5o of torque shoulder.
Further, taper angle theta=6~14 ° of circular conical surface and conical bore,
Further, the magnitude of interference that circular conical surface forms radial interference fit with conical bore is 0.46~0.85mm.
Further, guide surface includes the conical surface section and cylinder section set gradually along body ecto-entad, conical surface section
Taper is 1:16.
Further, externally threaded nose length L1=8.5~12.5mm, internal thread withdrawing length L2=L1-3.5mm.
Compared with the prior art the utility model has advantages below：
The utility model is simple in construction, compact, reasonable, and torque shoulder is arranged to reverse shoulder, and internal and external threads are barb-shaped
Structure, reverse circular bead surface and screw thread loading end composition wedge structure, significantly enhance the bulk strength and bending resistance of joint；
The main seal structure of circular conical surface and conical bore, and by the use of internal thread alveolus as thread compound holding tank, ensure stable on sealing surface
Distribution of contact, strengthen sealing effectiveness.
Brief description of the drawings
Fig. 1 is the utility model front view.
Fig. 2 is forward end seal portion structure figure of the present utility model.
Fig. 3 is internal and external threads tooth form structure chart of the present utility model.
Description of reference numerals：1- box cuplings, 2- internal threads, 3- cylindrical holes, 4- conical bores, 5- torque shoulders, 6- smooth end faces,
7- circular conical surfaces, 8- guide surfaces, 9- external screw threads, 10- bodys, 11- conical surfaces section, 12- cylinders section, 13- thread compounds storage chamber, A- wedge shapes
Structure.
Embodiment
The utility model will be further described with reference to the embodiment in accompanying drawing below：
As shown in Fig. 1 ~ 3, the utility model mainly includes box cupling 1 and body 10, and the medial center of box cupling 1 is provided with torque shoulder
5, the symmetrical setting internal thread 2 in the left and right sides of torque shoulder 5.The surface of body 10 is provided with external screw thread 9, and box cupling 1 and body 10 are logical
Cross internal thread 2 and external screw thread 9 links into an integrated entity.
In order to improve the bending resistance of joint, as shown in figure 3, internal thread 2 and external screw thread 9 are reverse-hook shape structure, interior spiral shell
Loading end angle [alpha]=- 1~-3.5 ° of line 2 and external screw thread 9, spigot surface angle beta=10~25 °, the high h1 of tooth of external screw thread 9=
0.72~1.58mm, the high h2=h1+0.20mm of tooth of internal thread 2.Screw thread carrying face angle is that negative value can reduce drawing to greatest extent
Stretch, radial component caused by screw thread under bending load, the height of internal and external screw thread is slightly different, can be in the gap that screw thread engages
Position stores unnecessary thread compound, the joint efficiency of screw thread is farthest brought into play.
The torque shoulder 5 is arranged to reverse shoulder, shoulder angle γ=15 ± 0.5o, and reverse shoulder end face is held with screw thread
Section is connected to form wedge structure A, and wedge structure A is constrained between two moving components using the stiction between wedge
Motion, the internal and external threads of this joint are reverse-hook shape, have wedge type effect between its loading end and reverse circular bead surface, make joint whole
Body is stronger, and rigidity is more preferable, further enhances the intensity and bending resistance of joint.
Body 10 is provided with smooth end face 6 close to the one end of box cupling 1, and smooth end face 6 forms axial interference with torque shoulder 5 and matched somebody with somebody
Close.
In order to improve the gas sealing ability of joint, conical bore 4 is provided between the torque shoulder 5 and internal thread 2 of box cupling 1, is managed
Circular conical surface 7, after box cupling 1 and body 10 are tightened, circular conical surface 7 and conical bore are provided between the external screw thread 9 and smooth end face 6 of body 10
4 form radial interference fit.Taper angle theta=6~14 ° of circular conical surface 7 and conical bore 4, circular conical surface 7 form radial interference with conical bore 4
The magnitude of interference of cooperation is 0.46~0.85mm.
Cylindrical hole 3 is provided between the internal thread 2 and conical bore 4 of box cupling 1, is set between the external screw thread 9 and circular conical surface 7 of body 10
There is guide surface 8, after box cupling 1 and body 10 are tightened, cylindrical hole 3 and the connection of guide surface 8 form gap cooperation.
The guide surface 8 includes the conical surface section 11 and cylinder section 12 set gradually along the ecto-entad of body 10, conical surface section
11 taper is 1:16.
In order to prevent excessive thread compound during upper button from influenceing the contact stress on sealing surface, the nose length of external screw thread 9
L1=8.5~12.5mm, the withdrawing length L2=L1-3.5mm of internal thread 2 are spent, such joint ensures spiral shell at least in a tooth after tightening
Line is not engaged, and thread compound storage chamber 13 is formed between internal thread 2 and cylindrical hole 3, stores unnecessary thread compound.
One embodiment of the present utility model is the oil pipe for the mm P110 grade of steels of Ф 88.9 × 7.34.Oil pipe body
Physical dimension include external diameter, wall thickness etc. and use API standard setting, tubing material meets API standard to P110 steel grade oils
The requirement of tube material.High h1=the 1.00mm of its external screw thread tooth, the high h2=1.20mm of tooth of internal thread, carrying face angle α=- 3 °, spigot surface
Angle beta=10 °, taper 1:16, pitch 6.35mm.Outer nose length L1=8.5mm, internal thread withdrawing length L2=5.0mm, moment of torsion platform
Shoulder is arranged to reverse shoulder, and shoulder angle γ=15 ± 0.5o, conical bore is identical with the taper of circular conical surface, taper angle theta=6 °, cooperation
The magnitude of interference is 0.50mm.For the hermetic seal drag of the joint up to more than 110.0MPa, bending resistance reaches 106 °/30 meters.
Second embodiment of the present utility model is to be used for the sleeve pipe of Ф 177.8 × 10.36mm, Q125 grade of steels, sleeve pipe pipe
The physical dimension of body includes external diameter, wall thickness etc. and uses API standard setting, and shell material meets API standard to Q125 grade of steels
The requirement of shell material.
High h1=the 1.58mm of its external screw thread tooth, the high h2=1.78mm of tooth of internal thread, carrying face angle α=- 3 °, spigot surface angle beta=
10 °, taper 1:16, pitch 5.08mm.External screw thread nose length L1=12.5mm, internal thread withdrawing length L2=9.5mm, moment of torsion platform
Shoulder is arranged to reverse shoulder, and shoulder angle γ=15 ± 0.5o, conical bore is identical with the taper of circular conical surface, taper angle theta=14 °, coordinates
The magnitude of interference be 0.75mm.For the hermetic seal drag of the joint up to more than 88.0MPa, bending resistance reaches 45 °/30 meters.
Claims (7)
1. a kind of horizontal well and extended reach well nipple, including box cupling（1）And body（10）, box cupling（1）Medial center is set
There is torque shoulder（5）, torque shoulder（5）The symmetrical setting internal thread in the left and right sides（2）, body（10）Surface is provided with external screw thread
（9）, box cupling（1）And body（10）Pass through internal thread（2）And external screw thread（9）Link into an integrated entity, it is characterized in that：Torque shoulder（5）
For reverse shoulder structure, reverse shoulder end face is connected to form wedge structure with screw thread loading end（A）；Body（10）Close to box cupling
（1）One end is provided with smooth end face（6）, smooth end face（6）With torque shoulder（5）Form axially interference fit；Box cupling（1）Moment of torsion
Shoulder（5）And internal thread（2）Between be provided with conical bore（4）, body（10）External screw thread（9）And smooth end face（6）Between be provided with
Circular conical surface（7）, circular conical surface（7）With conical bore（4）Form radial interference fit；Box cupling（1）Internal thread（2）And conical bore（4）
Between be provided with cylindrical hole（3）, body（10）External screw thread（9）And circular conical surface（7）Between be provided with guide surface（8）, cylindrical hole（3）With
Guide surface（8）Connection forms gap cooperation；The internal thread（2）And cylindrical hole（3）Between formed thread compound storage chamber（13）.
2. a kind of horizontal well and extended reach well nipple as claimed in claim 1, it is characterized in that：The internal thread（2）
And external screw thread（9）For reverse-hook shape structure, internal thread（2）And external screw thread（9）Loading end angle [alpha]=- 1~-3.5 °, spigot surface
Angle beta=10~25 °, external screw thread（9）High h1=0.72 of tooth~1.58mm, internal thread（2）The high h2=h1+0.20mm of tooth.
3. a kind of horizontal well and extended reach well nipple as claimed in claim 1, it is characterized in that：The torque shoulder
（5）Shoulder angle γ=15 ± 0.5o.
4. a kind of horizontal well and extended reach well nipple as claimed in claim 1, it is characterized in that：The circular conical surface（7）
With conical bore（4）Taper angle theta=6~14 °.
5. a kind of horizontal well and extended reach well nipple as claimed in claim 1, it is characterized in that：The circular conical surface（7）
With conical bore（4）The magnitude of interference for forming radial interference fit is 0.46~0.85mm.
6. a kind of horizontal well and extended reach well nipple as claimed in claim 1, it is characterized in that：The guide surface（8）
Including along body（10）The conical surface section that ecto-entad is set gradually（11）With cylinder section（12）, conical surface section（11）Taper be 1:
16。
7. a kind of horizontal well and extended reach well nipple as claimed in claim 1, it is characterized in that：The external screw thread（9）
Nose length L1=8.5~12.5mm, internal thread（2）Withdrawing length L2=L1-3.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720139326.1U CN206753508U (en) | 2017-02-15 | 2017-02-15 | A kind of horizontal well and extended reach well nipple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720139326.1U CN206753508U (en) | 2017-02-15 | 2017-02-15 | A kind of horizontal well and extended reach well nipple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206753508U true CN206753508U (en) | 2017-12-15 |
Family
ID=60609607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720139326.1U Expired - Fee Related CN206753508U (en) | 2017-02-15 | 2017-02-15 | A kind of horizontal well and extended reach well nipple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206753508U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318689A (en) * | 2019-08-19 | 2019-10-11 | 中国石油天然气集团有限公司 | A kind of shale gas well high-performance metal self-sealing Special threading connector |
| CN110374522A (en) * | 2019-06-28 | 2019-10-25 | 中国石油天然气集团有限公司 | A kind of shale gas exploitation nipple |
-
2017
- 2017-02-15 CN CN201720139326.1U patent/CN206753508U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374522A (en) * | 2019-06-28 | 2019-10-25 | 中国石油天然气集团有限公司 | A kind of shale gas exploitation nipple |
| CN110318689A (en) * | 2019-08-19 | 2019-10-11 | 中国石油天然气集团有限公司 | A kind of shale gas well high-performance metal self-sealing Special threading connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20220215 |