CN201496003U - Thread connector of special oil sleeve - Google Patents
Thread connector of special oil sleeve Download PDFInfo
- Publication number
- CN201496003U CN201496003U CN2009202313607U CN200920231360U CN201496003U CN 201496003 U CN201496003 U CN 201496003U CN 2009202313607 U CN2009202313607 U CN 2009202313607U CN 200920231360 U CN200920231360 U CN 200920231360U CN 201496003 U CN201496003 U CN 201496003U
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- thread section
- external thread
- internal thread
- thread segment
- internal
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model discloses a thread connector of special oil sleeve, which comprises a sleeve body and a box coupling; the sleeve body is provided with an outer cone which is provided with an outer thread section, playing the role of seal; the box coupling is provided with an inner cone which is provided with an inner thread section, playing the role of seal; the outer cone is arranged between the outer thread section and the end surface of the sleeve body; the inner cone is arranged behind the tail end of the inner thread section; the outer thread section and the inner thread section are mutually connected; the thread profiles of the outer thread section and the inner thread section adopt the angle of bearing surface as normal angle buttress thread; the outer cone and the inner cone after the outer thread section and the inner thread section are mutually screwed and connected, form a fit main seal structure. The connection strength of the thread connector of special oil sleeve is equal to a single sleeve body and a multi-seal structure improves the seal reliability. The thread connector of special oil sleeve has a higher composite bearing capacity, and can be used as the substitute for imported product and used in the petroleum exploration industry.
Description
Technical field
The utility model relates to the tubing and casing technical field, the oil casing threaded connector of especially a kind of special type.
Background technology
Continuous development along with China's oilfield prospecting developing, deep-well, ultradeep well, high-pressure oil-gas well, thermal production well, directional well, contain corrosive medium wells such as CO2 or H2S and occur in a large number, gas tightness, bonding strength and the corrosion resistance etc. of these oil gas well double thread jointings are all had higher requirement, jointing commonly used at present adopts traditional API helicitic texture usually, is difficult to satisfy the requirement of aspects such as these oil gas well mining technology, safety.
Production domesticization along with the tubing and casing product, domestic tubing and casing output is the trend that increases year by year, the common API joint tubing and casing that use in present domestic oil field has realized production domesticization substantially, but China's special type nipple tubing and casing is no matter on output, on the kind or qualitatively, all far can not satisfy the demand of fast-developing oilfield prospecting developing, basically dependence on import, the special type oil sleeve joint of producing as French WAM company almost occupies more than half market, the world, therefore be necessary to research and develop to produce the bonding strength height, the special type oil sleeve joint of the production domesticization of good seal performance is to satisfy the demand of domestic oilfield prospecting developing.
The utility model content
The technical problems to be solved in the utility model is: overcome the deficiency in the prior art, the oil casing threaded connector of special type of a kind of bonding strength height, good seal performance is provided.
The technical scheme that its technical problem that solves the utility model adopts is: the oil casing threaded connector of a kind of special type, comprise body and box cupling, the outer conical surface that body has external thread section and seals, the internal conical surface that box cupling has internal thread segment and seals, outer conical surface is between external thread section and body end face, internal conical surface is positioned at after the internal thread segment tail end, external thread section and internal thread segment interconnect, it is the buttress thread of positive-angle that the form of thread of described external thread section and internal thread segment adopts the bearing surface angle, external thread section comprises first external thread section and diameter second external thread section greater than first external thread section, internal thread segment comprises first internal thread segment and diameter second internal thread segment greater than first internal thread segment, first external thread section and first internal thread segment, second external thread section screws respectively with second internal thread segment and is connected, and outer conical surface screws mutually in external thread section and internal thread segment with internal conical surface and is connected the primary seal structure that the back forms interference.
Specifically, the screw thread bearing surface of described external thread section and internal thread segment and the angle of vertical plane are 20 °, and the angle of its spigot surface and vertical plane is 7 °.
Further, for improving sealing performance, has outer right angle shoulder between described first external thread section and second external thread section, has interior right angle shoulder between first internal thread segment and second internal thread segment, have the negative angle circular bead surface between the outer diametric plane of body and second external thread section, coupling face has the positive angle circular bead surface, external thread section and internal thread segment screw be connected after, outer right angle shoulder and interior right angle shoulder, negative angle circular bead surface and positive angle circular bead surface are axially fitted respectively, form the secondary hermetically-sealed construction of contact.
Described negative angle circular bead surface has identical inclination angle with the positive angle circular bead surface.
In order to make the primary seal structure form good interference fit, the tapering of described outer conical surface and internal conical surface is 1: 2.
Go into button when being connected for external thread section and internal thread segment are screwed mutually easily, be difficult for thread alternating, the tooth top of described external thread section and internal thread segment is parallel to the tubing and casing central axis.
The beneficial effects of the utility model are: the utility model is the buttress thread connection of positive-angle owing to having adopted bearing surface, intensity after the connection is equal to independent body, multi-sealing structure improves sealing reliability, can provide and the independent suitable interior compressive resistance of body, the negative angle circular bead surface contacts cooperation with the positive angle circular bead surface, both had sealing effectiveness, have degeneration-resistant again to the moment of torsion function, make joint under Action of Combined Loads, still can keep the surface pressing on the circular bead surface, the interior flat design of thread segment can effectively reduce gas or the turbulent phenomenon of liquid in pipeline, prevents energy loss.
Description of drawings
Below in conjunction with drawings and embodiments the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the broken section enlarged drawing of Fig. 1 middle tube body.
Fig. 3 is the broken section enlarged drawing of box cupling among Fig. 1.
Fig. 4 is the form of thread schematic diagram of internal thread segment described in the utility model.
Fig. 5 is the form of thread schematic diagram of external thread section described in the utility model.
The specific embodiment.
In conjunction with the accompanying drawings the utility model is further described now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
As Fig. 1～oil casing threaded connector of a kind of special type shown in Figure 5, comprise body 1 and box cupling 2, the outer conical surface 12 that body 1 has external thread section 11 and seals, the internal conical surface 22 that box cupling 2 has internal thread segment 21 and seals, outer conical surface 12 is between external thread section 11 and body 1 end face, internal conical surface 22 is positioned at after internal thread segment 21 tail ends, external thread section 11 on the body 1 comprises the first external thread section 11-1 and the diameter second external thread section 11-2 greater than the first external thread section 11-1, internal thread segment 21 on the box cupling 2 comprises the first internal thread segment 21-1 and the diameter second internal thread segment 21-2 greater than the first internal thread segment 21-1, the first external thread section 11-1 and the first internal thread segment 21-1, the second external thread section 11-2 screws respectively with the second internal thread segment 21-2 and is connected, and outer conical surface 12 screws mutually in external thread section 11 and internal thread segment 21 with internal conical surface 22 and is connected the primary seal structure that the back forms interference.
The external thread section 11 of body 1 and the internal thread segment of box cupling 2 21 is adaptive mutually and be connected, thread surface to external thread section 11 and internal thread segment 21 is all carried out cold phosphatization or cold copper plating treatment, produce the thread gluing phenomenon when preventing to connect, it is the buttress thread of positive-angle that the tooth form of screw thread adopts the bearing surface angle, the angle [alpha] of its screw thread bearing surface and vertical plane is 20 °, the angle beta of its spigot surface and vertical plane is 7 °, outward, internal thread adopts matched in clearance to connect, help improving the ability of the bonding strength and the stress corrosion resistant of joint, parallel to the axis at the bottom of the tooth top of the screw thread of external thread section 11 and internal thread segment 21 and the tooth, go into button during connection easily, be difficult for thread alternating, guarantee to connect accurate.
The utility model adopts the primary seal structure of outer conical surface 12 and internal conical surface 22 interference fit, the main stress state of considering sealing surface of determining of its magnitude of interference is less than the yield pressure of the contact strength of the yield limit of material therefor and sealing surface greater than tube wall, as calculated and the experiment, the selected magnitude of interference is 0.1mm in the present embodiment, the tapering of outer conical surface 12 and internal conical surface 22 is 1: 2 simultaneously, help guaranteeing that outer conical surface 12 and internal conical surface 22 form preferable interference fit, improve sealing effectiveness.
For further improving sealing effectiveness, has outer right angle shoulder 13 between the first external thread section 11-1 and the second external thread section 11-2, has interior right angle shoulder 23 between the first internal thread segment 21-1 and the second internal thread segment 21-2, has negative angle circular bead surface 14 between the body 1 outer diametric plane and the second external thread section 11-2, box cupling 2 end faces have positive angle circular bead surface 24, external thread section 11 and internal thread segment 21 screw be connected after, outer right angle shoulder 13 and interior right angle shoulder 23, negative angle circular bead surface 14 is axially fitted respectively with positive angle circular bead surface 24, form the secondary hermetically-sealed construction of contact, negative angle circular bead surface 14 is exactly a torque resistant with the main effect of the shoulder structure that positive angle circular bead surface 24 forms, improve the composite bearing ability of joint, only could fit in these two planes under precision machined condition, form the secondary hermetically-sealed construction of contact, with respect to plane perpendicular to axis, negative angle circular bead surface 14 has 30 ° of identical inclination angles with positive angle circular bead surface 24, in addition, the diameter of bore size of the endoporus of body 1 and box cupling 2 is basic identical, thereby form approximate interior flat structure, can effectively reduce gas or the liquid turbulent phenomenon in pipeline, make energy loss minimum.
The oil casing threaded connector of special type described in the utility model adopts coupling type to connect, and bonding strength can be equal to body; Connecting thread adopts improved buttress thread, and the intensity height is processed simple relatively; Sealing adopt the conical surface/conical surface radially primary seal structure and shoulder axially contact the secondary hermetically-sealed construction of applying, help improving sealing effectiveness; Use in the place that this tubing and casing jointing is widely used in deep-well, ultradeep well, high-pressure oil-gas well, thermal production well, directional well, contain corrosive medium wells such as CO2 or H2S, and the substitute that also can be used as French WAM company product is applied to the oil exploitation industry.
With above-mentioned foundation embodiment of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from the utility model technological thought.Technical scope of the present utility model is not limited to the content on the manual, must determine its technical scope according to the claim scope.
Claims (6)
1. oil casing threaded connector of special type, comprise body (1) and box cupling (2), the outer conical surface (12) that body (1) has external thread section (11) and seals, the internal conical surface (22) that box cupling (2) has internal thread segment (21) and seals, outer conical surface (12) is positioned between external thread section (11) and body (1) end face, internal conical surface (22) is positioned at after internal thread segment (21) tail end, external thread section (11) and internal thread segment (21) interconnect, it is characterized in that: it is the buttress thread of positive-angle that the form of thread of described external thread section (11) and internal thread segment (21) adopts the bearing surface angle, external thread section (11) comprises first external thread section (11-1) and diameter second external thread section (11-2) greater than first external thread section (11-1), internal thread segment (21) comprises first internal thread segment (21-1) and diameter second internal thread segment (21-2) greater than first internal thread segment (21-1), first external thread section (11-1) and first internal thread segment (21-1), second external thread section (11-2) screws respectively with second internal thread segment (21-2) and is connected, and outer conical surface (12) screws mutually in external thread section (11) and internal thread segment (21) with internal conical surface (22) and is connected the primary seal structure that the back forms interference.
2. the oil casing threaded connector of special type according to claim 1, it is characterized in that: the screw thread bearing surface of described external thread section (11) and internal thread segment (21) and the angle (α) of vertical plane are 20 °, and the angle (β) of its spigot surface angle and vertical plane is 7 °.
3. the oil casing threaded connector of special type according to claim 1, it is characterized in that: have outer right angle shoulder (13) between described first external thread section (11-1) and second external thread section (11-2), has interior right angle shoulder (23) between first internal thread segment (21-1) and second internal thread segment (21-2), has negative angle circular bead surface (14) between outer diametric plane of body (1) and second external thread section (11-2), box cupling (2) end face has positive angle circular bead surface (24), external thread section (11) and internal thread segment (21) screw be connected after, outer right angle shoulder (13) and interior right angle shoulder (23), negative angle circular bead surface (14) is axially fitted respectively with positive angle circular bead surface (24), forms the secondary hermetically-sealed construction of contact.
4. the oil casing threaded connector of special type according to claim 3 is characterized in that: described negative angle circular bead surface (14) has identical inclination angle with positive angle circular bead surface (24).
5. the oil casing threaded connector of special type according to claim 1 is characterized in that: the tapering of described outer conical surface (12) and internal conical surface (22) is 1: 2.
6. the oil casing threaded connector of special type according to claim 1 is characterized in that: the tooth top of described external thread section (11) and internal thread segment (21) is parallel to the tubing and casing central axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202313607U CN201496003U (en) | 2009-08-27 | 2009-08-27 | Thread connector of special oil sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202313607U CN201496003U (en) | 2009-08-27 | 2009-08-27 | Thread connector of special oil sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201496003U true CN201496003U (en) | 2010-06-02 |
Family
ID=42439211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202313607U Expired - Lifetime CN201496003U (en) | 2009-08-27 | 2009-08-27 | Thread connector of special oil sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201496003U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242608A (en) * | 2011-07-15 | 2011-11-16 | 上海大学 | Double-shoulder tri-conicity threading connector for high-temperature high-pressure petroleum casing pipe |
| CN102996079A (en) * | 2011-09-16 | 2013-03-27 | 中国石油化工股份有限公司 | Tubular air sealing screwed joint and application thereof |
| CN103046879A (en) * | 2013-01-07 | 2013-04-17 | 天津钢管集团股份有限公司 | Joint structure for casing thread with outside diameter of 508-622.3mm |
| CN105298411A (en) * | 2015-11-18 | 2016-02-03 | 中国石油集团渤海石油装备制造有限公司 | Sleeve joint structure |
| CN106089113A (en) * | 2016-08-16 | 2016-11-09 | 江苏迪威高压科技股份有限公司 | A kind of petroleum oil joint |
| CN106121551A (en) * | 2016-08-16 | 2016-11-16 | 江苏迪威高压科技股份有限公司 | A kind of leakage of oil monitoring type petroleum oil joint |
| CN106121552A (en) * | 2016-08-16 | 2016-11-16 | 江苏迪威高压科技股份有限公司 | Petroleum oil joint |
| CN106121553A (en) * | 2016-08-16 | 2016-11-16 | 江苏迪威高压科技股份有限公司 | A kind of flame retardant type petroleum oil joint |
-
2009
- 2009-08-27 CN CN2009202313607U patent/CN201496003U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242608A (en) * | 2011-07-15 | 2011-11-16 | 上海大学 | Double-shoulder tri-conicity threading connector for high-temperature high-pressure petroleum casing pipe |
| CN102996079A (en) * | 2011-09-16 | 2013-03-27 | 中国石油化工股份有限公司 | Tubular air sealing screwed joint and application thereof |
| CN103046879A (en) * | 2013-01-07 | 2013-04-17 | 天津钢管集团股份有限公司 | Joint structure for casing thread with outside diameter of 508-622.3mm |
| CN105298411A (en) * | 2015-11-18 | 2016-02-03 | 中国石油集团渤海石油装备制造有限公司 | Sleeve joint structure |
| CN106089113A (en) * | 2016-08-16 | 2016-11-09 | 江苏迪威高压科技股份有限公司 | A kind of petroleum oil joint |
| CN106121551A (en) * | 2016-08-16 | 2016-11-16 | 江苏迪威高压科技股份有限公司 | A kind of leakage of oil monitoring type petroleum oil joint |
| CN106121552A (en) * | 2016-08-16 | 2016-11-16 | 江苏迪威高压科技股份有限公司 | Petroleum oil joint |
| CN106121553A (en) * | 2016-08-16 | 2016-11-16 | 江苏迪威高压科技股份有限公司 | A kind of flame retardant type petroleum oil joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213100 No. 66 West Wujin Road, Wujin District, Jiangsu, Changzhou Patentee after: Jiangsu Shengda Petroleum Equipment Manufacturing Co., Ltd. Address before: 213100 No. 66 West Wujin Road, Wujin District, Jiangsu, Changzhou Patentee before: Jiangsu Shined Petroleum Equipment Manufacturing Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100602 |