CN205012933U - Airtight connection structure of anti thread gluing body of three circular beads - Google Patents
Airtight connection structure of anti thread gluing body of three circular beads Download PDFInfo
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- CN205012933U CN205012933U CN201520730260.4U CN201520730260U CN205012933U CN 205012933 U CN205012933 U CN 205012933U CN 201520730260 U CN201520730260 U CN 201520730260U CN 205012933 U CN205012933 U CN 205012933U
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Abstract
The utility model provides an airtight connection structure of anti thread gluing body of three circular beads, including the external thread pipe body and internal thread body, linkage segment at the external thread pipe body is equipped with the connection external screw thread, including the linkage segment of screw body be equipped with with the corresponding internal thread of being connected of external thread pipe body coupling external screw thread, the external thread pipe body and internal thread body closely connect through the screw thread soon, it only detains the circular bead to be provided with the third grade at external thread pipe linkage segment physically, including the linkage segment of screw body be provided with the third grade in addition of only detaining the circular bead corresponding with the third grade of external thread pipe body coupling section and only detain the circular bead, the top of the external thread pipe body and the sealed interference fit of the bottom conical surface of internal thread body. The utility model discloses no coupling formula is connected, and joint strength and body equal strength do not have the magnitude of interference between the screw thread, and stress level is low, anti thread gluing performance is good, sealing performance is good, not only the attach fitting can not produce to twist and lead to the screw thread to bear super high moment of torsion, ensures moreover that screwed joint can not produce the thread gluing problem.
Description
Technical field:
The utility model relates to the helicitic texture that petroleum gas tubing and casing connects, and specifically a kind of anti-stick button body is tightly connected joint.
Background technology:
Oil pipe and sleeve pipe are the degree of depth machinery converted products requiring high, consumption large in petroleum drilling and mining process.In the use of reality, be adopt screw thread single oil pipe or sleeve pipe to be connected to become to reach thousands of rice, and hundreds of atmospheric long string can be born, be equivalent to a tubulose high-pressure bottle.Wherein, can the technical performance be threaded ensure that drilling process safety is crucial reliably.Round thread and the buttress thread joint of API standard is used in China's routine, tubing and casing twists with screw thread the tubing string connecing and connect to form, screw thread is the weakest link in oil casing, its structural integrity, 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 structure design own, the sealing integrity in high temperature, high pressure, high corrosive medium content etc. " three is high " oil gas field environment cannot be met, very easily there is serious oil and gas leakage accident, due in these oil gas containing the noxious material such as H2S, bring great threat to oil gas safety and periphery ecological environment and people life property safety, simultaneously, it is low that titanium alloy material itself has modulus of elasticity, case hardness is low, anti-wear performance difference and the feature such as the coefficient of heat conduction is low, process common API screw thread with titanium alloy material and thread gluing phenomenon very easily occurs, the general special thread structure designed based on ferrous materials is not suitable for titanium alloy oil pipe yet, easy generation thread gluing and seal failure phenomenon, therefore for ensureing the security development of " three is high " oil gas field, also titanium alloy tubing and casing applying in oil and gas industry is promoted further, be badly in need of one and there is structural integrity, the reliably special thread structure of sealing performance and anti-stick button.Along with oil, the harshness day by day of gas well drilling environment and developing rapidly of oil-gas mining technology, common API modular connection can not meet existing engineering requirement.
Must use Steel Casing and oil pipe in oil, natural gas drilling process, at present, oil well pipe is the tubing string of the km length be formed by connecting by single oil well pipe by special screw thread, comprises casing string, tubing string.Entering to be drilled to well under casing string, ruining for preventing formation fluids and stratum from squeezing.Oil field needs to reuse oil pipe in the construction operations such as pressure break, perforation and oil recovery, reuses in process at oil pipe, and jointing need repeatedly above be buckled and shackle, and jointing damage easily occurs misoperation, causes joint screw thread thread gluing problem.
Thread gluing a kind ofly occurs in the cold welding contacted with each other between metal surface, and it is oil casing threaded in use modal damage failure mode.Thread gluing is caused by metal surface relative sliding under the high contact stress effect in local, and thread gluing is attributed to two contact surfaces does not usually have enough lubrications.American Petroleum Institute (API) (API) standard-required oil pipe jointing must bear 5 times and above buckle 4 shackle not thread gluings, and sleeve pipe jointing must bear 3 times and above buckle 2 shackle not thread gluings.
Thread gluing can reduce oil, the sealing performance of casing joint and supporting capacity, even causes threading off, and finally makes oil, the casing string life-span significantly reduces.There is a lot of oil, sleeve thread gluing accident in oil field.At present, domestic and international most of factory does not also solve oil, sleeve thread gluing problem completely.
Utility model content:
The purpose of this utility model is to provide the anti-stick button body of a kind of three shoulder and is tightly connected structure, and bonding strength is high, and anti-stick button performance is good, good seal performance.
The technical scheme that the utility model is taked is as follows:
The anti-stick button body of a kind of three shoulder is tightly connected structure, it is characterized in that: comprise external screw thread body and internal thread body, the linkage section of screw-thread pipe body is provided with the first thread segment and the second thread segment outside, the 3rd thread segment matched with the first thread segment and the 4th thread segment matched with the second thread segment is provided with at the linkage section of internal thread body, external screw thread body and internal thread body are by the first thread segment, second thread segment, 3rd thread segment and the 4th thread segment closely spin, the first clamping shoulder is provided with between first thread segment and disconnected section of external screw thread body, the second clamping shoulder is provided with between first thread segment and the second thread segment, the 3rd clamping shoulder is provided with on the top of the second thread segment, the four clamping shoulder corresponding with the 3rd clamping shoulder is provided with between the 4th thread segment and disconnected section of internal thread body, the five clamping shoulder corresponding with the second clamping shoulder is provided with between the 3rd thread segment and the 4th thread segment, the top of the 3rd thread segment is provided with the six clamping shoulder corresponding with the first clamping shoulder, cylindrical seal section is provided with outside between second thread segment of screw-thread pipe body and the 3rd clamping shoulder, endoporus seal section is provided with between the 4th thread segment and the 4th clamping shoulder of internal thread body, cylindrical seal section and endoporus seal section interference fit.
Further, described cylindrical seal section and endoporus seal section are conical surface sealing structure.
Further, larger than the conical surface cone angle of endoporus seal section 0.5 ° ~ 1 ° of the conical surface cone angle of described cylindrical seal section.
Further, the sealing radial interference of described cylindrical seal section and endoporus seal section is 0.05 ~ 0.75mm.
Further, the interface width of described cylindrical seal section and endoporus seal section is 2 ~ 10mm.
Further, the first clamping shoulder is 10 ° ~ 30 ° barb-shaped, and the 6th clamping shoulder is corresponding with the first clamping shoulder, and what form 10 ° ~ 30 ° between the two is barb-shapedly tightly connected, and improves the flexing resistance of jointing.
To be tightly connected structure owing to using the anti-stick button body of three shoulder described in the utility model, screw thread for connecting is straight cylinder screw thread, the interference of internal and external threads is zero, stop the elastane thread interference existed between internal and external threads joint, and relative plain taper screw thread, when engaging without the shearing force of radial direction, the screw thread cold welding effect because high contact causes can not be there is, greatly reducing Thread-sticking trend; And outside screw-thread pipe body and internal thread body are provided with the anti-mistake of three road clampings and twist shoulder, effectively can guarantee the position of intermeshing of jointing, can not produce to twist causes screw thread to bear the problem of superelevation moment of torsion, also guarantees that nipple can not produce thread gluing problem from another point of view.The cylindrical seal section of external screw thread body and the endoporus seal section of internal thread body are set to adopting conical surface interference and are sealed and matched, and interior pressure effectively can be stoped to leak, and can not damage body screw thread by suitable sealed increscence amount.Be set to the barb-shaped Hermetical connecting structure of 10 ° ~ 30 ° between 6th clamping shoulder and the first clamping shoulder, improve the flexing resistance of jointing.
The utility model connects without coupling type, the pier bulk processing of pipe position, bonding strength and body equal strength, and adopt cylindrical thread to connect, do not have the magnitude of interference between screw thread, stress level is low, and anti-stick button performance is good; Adopt adopting conical surface interference hermetically-sealed construction, good seal performance; Adopt the anti-mistake of three road clampings to twist shoulder, guarantee that jointing can not produce to twist and cause screw thread to bear superelevation moment of torsion, and guarantee that nipple can not produce thread gluing problem.This joint can use as operation tubing, is also particularly suitable for using under corrosive environment.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model;
In figure: 1-external screw thread body; 2-internal thread body; 11-first thread segment; 12-second thread segment; 13-first clamping shoulder; 14-second clamping shoulder; 15-the 3rd clamping shoulder; 16-cylindrical seal section; 21-the 3rd thread segment; 22-the 4th thread segment; 23-the 4th clamping shoulder; 24-the 5th clamping shoulder; 25-the 6th clamping shoulder; 26-endoporus seal section.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described.
The anti-stick button body of a kind of three shoulder is tightly connected structure, as shown in Figure 1, comprise external screw thread body 1 and internal thread body 2, the linkage section of screw-thread pipe body 1 is provided with the first thread segment 11 and the second thread segment 12 outside, the 3rd thread segment 21 matched with the first thread segment 11 and the 4th thread segment 22 matched with the second thread segment 12 is provided with at the linkage section of internal thread body 2, external screw thread body 1 and internal thread body 2 are by the first thread segment 11, second thread segment 12, 3rd thread segment 21 and the 4th thread segment 22 closely spin, the first clamping shoulder 13 is provided with between first thread segment 11 and disconnected section of external screw thread body 1, the second clamping shoulder 14 is provided with between first thread segment 11 and the second thread segment 12, the top of the second thread segment 12 is provided with the 3rd clamping shoulder 15, the four clamping shoulder 23 corresponding with the 3rd clamping shoulder 15 is provided with between the 4th thread segment 22 and disconnected section of internal thread body 2, the five clamping shoulder 24 corresponding with the second clamping shoulder 14 is provided with between the 3rd thread segment 21 and the 4th thread segment 22, the top of the 3rd thread segment 21 is provided with the six clamping shoulder 25 corresponding with the first clamping shoulder 13, cylindrical seal section 16 is provided with outside between second thread segment 12 of screw-thread pipe body 1 and the 3rd clamping shoulder 15, endoporus seal section 26 is provided with between the 4th thread segment 22 and the 4th clamping shoulder 23 of internal thread body 2, cylindrical seal section 16 and endoporus seal section 26 are conical surface seal interference fit, larger than the conical surface cone angle of endoporus seal section 26 0.5 ° of the conical surface cone angle of cylindrical seal section 16, the sealing radial interference of cylindrical seal section 16 and endoporus seal section 26 is 0.5mm, the interface width of cylindrical seal section 16 and endoporus seal section 26 is 5mm, first clamping shoulder 13 is 20 ° barb-shaped, 6th clamping shoulder 25 is corresponding with the first clamping shoulder 13, the barb-shaped of formation 20 ° is tightly connected between the two, improve the flexing resistance of jointing.
The anti-stick button body of the three shoulder described in the utility model structural implementation that is tightly connected is not limited to example, also has the function replacing structures such as a lot, as long as adopt all technical schemes of technical thought of the present utility model all to belong to protection domain of the present utility model.
Claims (6)
1. the anti-stick button body of shoulder is tightly connected structure, it is characterized in that: comprise external screw thread body (1) and internal thread body (2), the linkage section of screw-thread pipe body (1) is provided with the first thread segment (11) and the second thread segment (12) outside, the 3rd thread segment (21) matched with the first thread segment (11) and the 4th thread segment (22) matched with the second thread segment (12) is provided with at the linkage section of internal thread body (2), external screw thread body (1) and internal thread body (2) are by the first thread segment (11), second thread segment (12), 3rd thread segment (21) and the 4th thread segment (22) closely spin, the first clamping shoulder (13) is provided with between first thread segment (11) and disconnected section of external screw thread body (1), the second clamping shoulder (14) is provided with between first thread segment (11) and the second thread segment (12), the 3rd clamping shoulder (15) is provided with on the top of the second thread segment (12), the four clamping shoulder (23) corresponding with the 3rd clamping shoulder (15) is provided with between the 4th thread segment (22) and disconnected section of internal thread body (2), the five clamping shoulder (24) corresponding with the second clamping shoulder (14) is provided with between the 3rd thread segment (21) and the 4th thread segment (22), the top of the 3rd thread segment (21) is provided with the six clamping shoulder (25) corresponding with the first clamping shoulder (13), cylindrical seal section (16) is provided with outside between second thread segment (12) of screw-thread pipe body (1) and the 3rd clamping shoulder (15), endoporus seal section (26) is provided with between the 4th thread segment (22) and the 4th clamping shoulder (23) of internal thread body (2), cylindrical seal section (16) and endoporus seal section (26) interference fit.
2. the anti-stick button body of three shoulders is tightly connected structure according to claim 1, it is characterized in that: described cylindrical seal section (16) and endoporus seal section (26) are conical surface sealing structure.
3. the anti-stick button body of three shoulders is tightly connected structure according to claim 2, it is characterized in that: larger than the conical surface cone angle of endoporus seal section (26) 0.5 ° ~ 1 ° of the conical surface cone angle of described cylindrical seal section (16).
4. the anti-stick button body of three shoulders is tightly connected structure according to claim 1, it is characterized in that: the sealing radial interference of described cylindrical seal section (16) and endoporus seal section (26) is 0.05 ~ 0.75mm.
5. the anti-stick button body of three shoulders is tightly connected structure according to claim 1, it is characterized in that: the interface width of described cylindrical seal section (16) and endoporus seal section (26) is 2 ~ 10mm.
6. the anti-stick button body of three shoulders is tightly connected structure according to claim 1, it is characterized in that: the first clamping shoulder (13) is 10 ° ~ 30 ° barb-shaped, 6th clamping shoulder (25) is corresponding with the first clamping shoulder (13), and the barb-shaped of formation 10 ° ~ 30 ° is tightly connected between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520730260.4U CN205012933U (en) | 2015-09-18 | 2015-09-18 | Airtight connection structure of anti thread gluing body of three circular beads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520730260.4U CN205012933U (en) | 2015-09-18 | 2015-09-18 | Airtight connection structure of anti thread gluing body of three circular beads |
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| Publication Number | Publication Date |
|---|---|
| CN205012933U true CN205012933U (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520730260.4U Active CN205012933U (en) | 2015-09-18 | 2015-09-18 | Airtight connection structure of anti thread gluing body of three circular beads |
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| CN (1) | CN205012933U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101054A (en) * | 2016-02-19 | 2017-08-29 | 杰富意钢铁株式会社 | Screw coupling for oil well pipe |
| CN111299978A (en) * | 2020-03-20 | 2020-06-19 | 贵州合纵达钢结构有限责任公司 | Preparation method of drilling follow-up casing |
-
2015
- 2015-09-18 CN CN201520730260.4U patent/CN205012933U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101054A (en) * | 2016-02-19 | 2017-08-29 | 杰富意钢铁株式会社 | Screw coupling for oil well pipe |
| CN107101054B (en) * | 2016-02-19 | 2019-06-28 | 杰富意钢铁株式会社 | Screw coupling for oil well pipe |
| CN111299978A (en) * | 2020-03-20 | 2020-06-19 | 贵州合纵达钢结构有限责任公司 | Preparation method of drilling follow-up casing |
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