CN203114195U - Special threaded bushing - Google Patents
Special threaded bushing Download PDFInfo
- Publication number
- CN203114195U CN203114195U CN 201220736822 CN201220736822U CN203114195U CN 203114195 U CN203114195 U CN 203114195U CN 201220736822 CN201220736822 CN 201220736822 CN 201220736822 U CN201220736822 U CN 201220736822U CN 203114195 U CN203114195 U CN 203114195U
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- Prior art keywords
- thread
- screw thread
- external screw
- box cupling
- locking
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Abstract
The utility model provides a special threaded bushing, which is characterized in that a connector of a pipe body is provided with large-taper, large-lead, four-strand and micro-varying-pitch flat trapezoid outer threads, the outer wall surface of the end part of the pipe body connector on the outer side of the outer threads is a connection surface between a supporting sealing outer cylindrical surface and a conical surface, and the end part of the pipe body connector is set as a reversed outer anti-torque circular shoulder; two ends of the inner wall of a coupling are respectively provided with large-taper, large-lead four-strand and varying-pitch flat trapezoid inner threads, and the coupling inner wall on the inner side of the inner threads is provided with a supporting sealing inner cylindrical surface corresponding to the supporting sealing outer cylindrical surface; the coupling inner wall on the inner side of the supporting sealing inner cylindrical surface is provided with a dovetail annular groove, and an O-shaped sealing ring is correspondently arranged in the dovetail annular groove; and the end surface of an inner staircase cylindrical surface is provided with a reversed inner anti-torque circular shoulder. The special threaded bushing is simple in structure, good in sealing performance, good in loosening resistance, high in strength, strong in load bearing capacity, high in water insulation performance, rapid to install and dismount and suitable for the deep water well drilling.
Description
Technical field
The utility model relates to a kind of threaded sleeve, particularly a kind of special thread sleeve pipe that is applied to deepwater drilling.
Background technology
, say some specific well location when the marine site depth of water surpasses certain limit owing to drilling technology advances by leaps and bounds, require the various performance parameters of surface pipe higher, thereby just need higher grade of material, the surface pipe that wall thickness is thicker the world today.The snap joint of conventional special thread sleeve pipe since its anti-ly squeeze, bending resistance, internal pressure strength be lower, tensile strength is also low, mounting or dismounting efficient is low, can not satisfy present needs.The depth of water is dark in order to satisfy, the drilling well needs of circumstance complication sea situation, presses for that a kind of bonding strength of exploitation is higher, the sealing withstand voltage properties is better, is more suitable for being applied to the special thread sleeve pipe of deepwater drilling.
The utility model content
The utility model purpose is in order to overcome the deficiencies in the prior art, a kind of special thread sleeve pipe is provided, has quick connection, it is good that connecting thread all carries performance, connector bonding strength height, strong, the sealing good pressure-resistant performance of anti-combined load ability are fit to be applied to deepwater drilling.
In order to achieve the above object, the utility model is by the following technical solutions:
A kind of special thread sleeve pipe comprises body and box cupling by thread connection, and the axial middle part of described box cupling inwall is provided with the interior step cylinder of ring-type;
The set screw thread of the joint of described body is big tapering, big helical pitch, four lines, little varying pitch external screw thread; Described external screw thread is buttress thread, and the outside wall surface of the pipe joint end in the described external screw thread outside is for supporting sealing external cylindrical surface and the taper seat face that is connected successively, and the end of described pipe joint is set to reverse outer torque resistant shoulder;
The two ends of described box cupling inwall are provided with the big tapering corresponding with described external screw thread, big helical pitch, four lines, the inclined to one side trapezoidal internal thread of little varying pitch, and the box cupling inwall in the internal thread inboard is provided with the support sealing inner cylinder face corresponding with described support sealing external cylindrical surface; Box cupling inwall in described support sealing inner cylinder face inboard is provided with a dovetail annular groove, and corresponding described dovetail annular groove disposes an O RunddichtringO; Torque resistant shoulder in the corresponding oppositely outer torque resistant shoulder of the end face of step cylinder is provided with oppositely in described;
As preferably, the place guiding that has been circular layout on the body of described external screw thread inboard supports external cylindrical surface, and correspondence is provided with place guiding and supports inner cylinder face on the box cupling inwall in the described internal thread outside.
As preferably, the inboard body that described guiding supports external cylindrical surface is provided with two locking recesses of symmetry, and the side of described each locking recess on the screw thread rotational direction is narrow portion, and opposite side is wide portion; Described box cupling can cover the part of locking recess; Corresponding each locking recess arrangement has the anti-loose spot of a self-locking and a guider screw, the anti-loose spot of described self-locking places locking recess, it protrudes from the body surface, and the anti-loose spot of described self-locking is provided with sour jujube type tooth towards the side of coupling face, and described guider screw passes the anti-loose spot of self-locking and screws in body.
As preferably, the varying pitch that described little varying pitch forms for the external thread pitch adjustment of tolerance value of the constant pitch on the conduct basis set according to screw thread; Internal thread pitch is not adjusted, and is the constant pitch screw thread.
As preferably, the bearing surface angle of described external screw thread and internal thread is 2 °, and the fitting surface angle is 30 °; Described external screw thread and internal thread are oblique top, wedged bottom profile of tooth.
As preferably, the tooth depth of described external screw thread and internal thread is 2.1mm.
As preferably, described body wall thickness is 20mm; Described body material is X52 oil tube steel or X56 oil tube steel.
As preferably, described box cupling material is the 20Mn2 structural alloy steel.
As preferably, the tapering of described external screw thread and internal thread is 1:6.
Compared with prior art, the utlity model has following beneficial effect:
By said structure, the utility model satisfied quick connection that the threaded sleeve institute that uses at the deep-sea should possess, bonding strength height, high pressure resistant, bearing load ability by force (tension, resistance to compression, bending resistance), can long-term stable operation specific (special) requirements.The utility model is reasonable in design, and is simple in structure, material grade height, good seal performance, only need about 3/4 circle of rotation can tighten body and box cupling, can make the sleeve pipe mounting or dismounting fast, anti-loosening property is good, improved the drilling well process greatly, should be when the marine site depth of water surpass certain limit, and the water isolating height.Very suitable and deepwater drilling.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model pipe joint structural representation;
Fig. 3 is the utility model box cupling interior wall construction schematic diagram;
Fig. 4 is the utility model body external screw thread tooth form structural representation;
Fig. 5 is the utility model box cupling inwall internal thread tooth form structural representation.
Among the figure:
The 1-body; The 11-external screw thread; The locking recess of 12-; The 13-guiding supports external cylindrical surface; 14-supports the sealing external cylindrical surface; 15-taper seat 16-is outer torque resistant shoulder oppositely; The 2-box cupling; The 21-internal thread; The 22-escape; 23-dovetail annular groove; The oppositely interior torque resistant shoulder of 24-; The 25-guiding supports inner cylinder face; 26-supports the sealing inner cylinder face; Step cylinder in the 27-; The 3-guider screw; Loose spot is prevented in the 4-self-locking; 5-O type rubber seal.
Now the utility model is described in further detail with specific embodiment by reference to the accompanying drawings.
The specific embodiment
Shown in Fig. 1 to 5, a wherein embodiment of special thread sleeve pipe described in the utility model is ZSB variable pitch screw sleeve pipe, and Z represents taper pipe thread (large taper screw thread), and S represents four lines, and B represents varying pitch.It comprises that by the body 1 of thread connection and box cupling 2 the axial middle part of described box cupling 2 inwalls is provided with the interior step cylinder 27 of ring-type; Described body 1 wall thickness is 20mm, and body 1 length overall is 11380mm, and body 1 external diameter Φ 508mm, body 1 material are X52 oil tube steel or X56 oil tube steel; Box cupling 2 materials are the 20Mn2 structural alloy steel.
Shown in Fig. 1 and 2, the set screw thread of body 1 joint is big tapering, big helical pitch, little varying pitch, four lines, trapezoidal partially oblique top wedged bottom external screw thread 11; The support sealing surface that the outside wall surface of the pipe joint end in described external screw thread 11 outsides is connected successively for support sealing external cylindrical surface 14 and taper seat 15, the end of described body 1 joint is set to oppositely outer torque resistant shoulder 16.The place guiding that has been circular layout on the body 1 of external screw thread 11 inboards supports external cylindrical surface 13, the inboard body 1 that described guiding supports external cylindrical surface 13 is provided with two symmetrical locking recesses 12, the side of each locking recess 12 on the screw thread rotational direction is narrow portion, and opposite side is wide portion; When body and box cupling were tightened mutually, box cupling 2 covered the part of locking recess 12; Corresponding each locking recess 12 disposes the anti-loose spot 4 of self-locking and guider screw 3, and the anti-loose spot 4 of described self-locking places locking recess 12, and it protrudes from body 1 surface, and the anti-loose spot 4 of described self-locking is provided with sour jujube type tooth towards the side of box cupling 2 end faces; Described guider screw 3 passes the anti-loose spot 4 of self-locking and screws in body 1.The indication of the inboard of external screw thread 11 and the outside such as Fig. 2.
Shown in Fig. 1 and 3, the two ends of box cupling 2 inwalls are provided with the big tapering corresponding with external screw thread 11, big helical pitch, uniform pitch, four lines, trapezoidal partially oblique top wedged bottom internal thread 21, and internal thread 21 sides are provided with the escape 22 of machining screw; Box cupling 2 inwalls in internal thread 21 inboards are provided with the support sealing inner cylinder face 26 corresponding with supporting sealing external cylindrical surface 14, described in the corresponding oppositely outer torque resistant shoulder 16 of end face of step cylinder 27 be provided with oppositely interior torque resistant shoulder 24.Corresponding described guiding supports external cylindrical surface 13 and is provided with place guiding support inner cylinder face 25 on box cupling 2 inwalls in internal thread 21 outsides.The indication of the inboard of internal thread 21 and the outside such as Fig. 3.
Dispose O type rubber seal 5, box cupling 3 inwalls of described support sealing inner cylinder face 26 inboards are provided with the dovetail annular groove of installing for O type rubber seal 5 23.
Shown in Fig. 4,5, external screw thread 11 is all identical with line number, tapering, the tooth depth of internal thread 21: the line number is four lines, and tapering is 1:6, and tooth depth is 2.1mm; External screw thread 11 is 2 ° with the bearing surface angle of internal thread 21, and the fitting surface angle is 30 °.External screw thread 11 is matched in clearance with the engagement of internal thread 21.
The utility model is the special thread sleeve pipe that is applied to deepwater drilling, the assembling process of its body and box cupling is as follows: O type rubber seal is installed in the annular groove, then body is screwed in box cupling and tighten, the anti-loose spot of self-locking is clamped between locking recess and the box cupling by external force, tightens guider screw then.
Structural principle is as follows:
The described variable pitch screw of ZSB variable pitch screw sleeve pipe refers to little varying pitch external screw thread, described little varying pitch is adjusted the varying pitch that the back forms for the tolerance value of the constant pitch on the conduct basis set according to external screw thread to the external screw thread pitch tolerance that is in diverse location, thereby realizes all connecting thread tooth bodies evenly stressed when tightening with stand under load.
It is elastic deformation amount during according to connecting thread tooth body stand under load and additive effect thereof and definite that the pitch of little varying pitch changes, and purpose is to realize all connecting thread tooth bodies evenly stressed when tightening with stand under load.Therefore structure, material, stand under load and the load type thereof of it and screw thread have substantial connection.Following table is 3 kinds of embodiments of little varying pitch, expresses the concrete data (ordering of tooth body by the inboard to the outside) of tooth body on the body and corresponding pitch.
The data (mm) of 3 kinds of little varying pitch scheme lower tube body upper tooth bodies of table 1 and corresponding pitch
Guiding supports external cylindrical surface, and to support inner cylinder face with guiding be the support stress surface of body and box cupling, and it is matched in clearance with guiding support inner cylinder face that guiding supports external cylindrical surface, i.e. Φ 506.4H7/G6, Φ 4824H7/G6.Guiding supports the inside and outside face of cylinder and supports the simply supported beam guiding braced structures that the inside and outside face of cylinder of sealing constitutes the screw thread two ends jointly, can effectively resist bending load to the effect of this special thread sleeve pipe connecting thread.The anti-loose spot of self-locking can locking locking body and box cupling, and purpose is to prevent that the external force effect from making the loosening and self-locking mechanism that arranges of connecting thread.When body and box cupling screw thread tighten put in place after, the anti-loose spot of self-locking is put into locking recess, and knocks along the screw thread rotational direction with hammer, it is clamped between body and the box cupling, then guider screw is tightened, prevent that self-locking from preventing the loose spot operating position of slipping away.When body and box cupling have the motion that makes thread looseness trend, because locking recess can not move the anti-loose spot of self-locking to the reverse effect of contraction of the anti-loose spot of self-locking on the body, and the sour jujube type tooth on the anti-loose spot of self-locking this moment, also coupling face is tightly bitten, it can not be moved.When dismounting box cupling and body, need unscrew guider screw and the anti-loose spot of self-locking is oppositely knocked, it is broken away from and the contacting of coupling face, make it lose locking effect, screw thread can be unscrewed subsequently, body is separated with box cupling.
Because the utility model adopts big tapering, big helical pitch, four line buttress thread structures, therefore only needs the rotation of 3/4 circle, just the part that is threaded of box cupling and body can be screwed onto the position, screw thread is tightened; Make body be connected faster convenience with box cupling.Screw thread design self-locking conditions satisfied, it tightens rear thread can self-locking.
O type rubber seal, support sealing external cylindrical surface seal the effect that inner cylinder face plays sealed tube body and box cupling jointly with support.
The utility model is not limited to above-mentioned embodiment, if various changes of the present utility model or modification are not broken away from spirit and scope of the present utility model, if these are changed and modification belongs within claim of the present utility model and the equivalent technologies scope, then the utility model also is intended to comprise these changes and change.
Claims (9)
1. a special thread sleeve pipe comprises body and box cupling by thread connection, and the axial middle part of described box cupling inwall is provided with the interior step cylinder of ring-type; It is characterized in that,
The set screw thread of the joint of described body is big tapering, big helical pitch, four lines, little varying pitch external screw thread; Described external screw thread is buttress thread, and the outside wall surface of the pipe joint end in the described external screw thread outside is for supporting sealing external cylindrical surface and the taper seat face that is connected successively, and the end of described pipe joint is set to reverse outer torque resistant shoulder;
The two ends of described box cupling inwall are provided with the big tapering corresponding with described external screw thread, big helical pitch, four lines, the inclined to one side trapezoidal internal thread of uniform pitch, and the box cupling inwall in the internal thread inboard is provided with the support sealing inner cylinder face corresponding with described support sealing external cylindrical surface; Box cupling inwall in described support sealing inner cylinder face inboard is provided with a dovetail annular groove, and corresponding described dovetail annular groove disposes an O RunddichtringO; Torque resistant shoulder in the corresponding oppositely outer torque resistant shoulder of the end face of step cylinder is provided with oppositely in described.
2. special thread sleeve pipe according to claim 1 is characterized in that, the place guiding that has been circular layout on the body of described external screw thread inboard supports external cylindrical surface, and correspondence is provided with place guiding and supports inner cylinder face on the box cupling inwall in the described internal thread outside.
3. special thread sleeve pipe according to claim 2, it is characterized in that, the inboard body that described guiding supports external cylindrical surface is provided with two symmetrical locking recesses, and the side of described each locking recess on the screw thread rotational direction is narrow portion, and opposite side is wide portion; Described box cupling can cover the part of locking recess; Corresponding each locking recess arrangement has the anti-loose spot of a self-locking and a guider screw, the anti-loose spot of described self-locking places locking recess, it protrudes from the body surface, and the anti-loose spot of described self-locking is provided with sour jujube type tooth towards the side of coupling face, and described guider screw passes the anti-loose spot of self-locking and screws in body.
4. according to the described special thread sleeve pipe of the arbitrary claim of claim 1 to 3, it is characterized in that described little varying pitch is adjusted little varying pitch that the back forms for the tolerance value of the constant pitch on the conduct basis set according to external screw thread to the external screw thread pitch tolerance that is in diverse location.
5. special thread sleeve pipe according to claim 1 is characterized in that, the bearing surface angle of described external screw thread and internal thread is 2 °, and the fitting surface angle is 30 °; Described external screw thread and internal thread are oblique top, wedged bottom profile of tooth.
6. special thread sleeve pipe according to claim 1 is characterized in that, the tooth depth of described external screw thread and internal thread is 2.1mm.
7. special thread sleeve pipe according to claim 1 is characterized in that, described body wall thickness is 20mm; Described body material is X52 oil tube steel or X56 oil tube steel.
8. special thread sleeve pipe according to claim 1 is characterized in that, described box cupling material is the 20Mn2 structural alloy steel.
9. special thread sleeve pipe according to claim 1 is characterized in that, the tapering of described external screw thread and internal thread is 1:6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220736822 CN203114195U (en) | 2012-12-27 | 2012-12-27 | Special threaded bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220736822 CN203114195U (en) | 2012-12-27 | 2012-12-27 | Special threaded bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114195U true CN203114195U (en) | 2013-08-07 |
Family
ID=48894555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220736822 Expired - Lifetime CN203114195U (en) | 2012-12-27 | 2012-12-27 | Special threaded bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203114195U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888573A (en) * | 2016-05-18 | 2016-08-24 | 建湖县永维阀门钻件有限公司 | Threaded connector of riser pipe |
| CN110005346A (en) * | 2019-04-04 | 2019-07-12 | 靖江特殊钢有限公司 | A kind of petroleum sleeve joint of metal loop seals |
-
2012
- 2012-12-27 CN CN 201220736822 patent/CN203114195U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888573A (en) * | 2016-05-18 | 2016-08-24 | 建湖县永维阀门钻件有限公司 | Threaded connector of riser pipe |
| CN105888573B (en) * | 2016-05-18 | 2017-02-22 | 建湖县永维阀门钻件有限公司 | Threaded connector of riser pipe |
| CN110005346A (en) * | 2019-04-04 | 2019-07-12 | 靖江特殊钢有限公司 | A kind of petroleum sleeve joint of metal loop seals |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170220 Address after: 100027 Beijing city Dongcheng District Dongzhimen Street No. 6 Patentee after: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Patentee after: CNOOC ENERGY DEVELOPMENT EQUIPMENT TECHNOLOGY Co.,Ltd. Patentee after: UNITED OFFSHORE CONSTRUCTION CO.,LTD. CONHW ZHANJIANG Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Patentee before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Patentee before: UNITED OFFSHORE CONSTRUCTION CO.,LTD. CONHW ZHANJIANG |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130807 |