CN201412076Y - Oil sleeve connector - Google Patents
Oil sleeve connector Download PDFInfo
- Publication number
- CN201412076Y CN201412076Y CN2009200463934U CN200920046393U CN201412076Y CN 201412076 Y CN201412076 Y CN 201412076Y CN 2009200463934 U CN2009200463934 U CN 2009200463934U CN 200920046393 U CN200920046393 U CN 200920046393U CN 201412076 Y CN201412076 Y CN 201412076Y
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- face
- screw thread
- external screw
- circular bead
- thread
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- Expired - Lifetime
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model discloses an oil sleeve connector, comprising a pipe body and a joint hoop, the pipe body is provided with external threads, an outer sealing surface and an end surface, the joint hoop is provided with internal threads, an inner sealing surface and a circular bead surface, the outer sealing surface is arranged between the outer threads and the end surface, the inner sealing surface is arranged between the internal threads and the circular bead surface, the outer threads and the internal threads are connected, and the end surface and the circular bead surface are adjacent axially, the thread form of the external threads and the internal threads adopts buttress threads with a positive-angle bearing surface; the outer sealing surface comprises an outer conical surface whichis smoothly transited with the end surface by an outer circular arc, the inner sealing surface comprises a convex circular arc surface which is smoothly transited with the circular bead surface by aninner circular arc, and the outer conical surface and the convex circular arc surface form an interference main-sealing structure after the external threads and the internal threads are screwed and connected. The intensity of the utility model is equal to the pipe body after being connected, the combined usage of the main and side sealing structures greatly improves the sealing reliability, and the oil sleeve connector has strong reverse-resisting torque function and can be applied to oil production industry as substitute of foreign imported products.
Description
Technical field
The utility model relates to the tubing and casing technical field, especially a kind of tubing and casing connector.
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, these oil gas wells are all had higher requirement to gas tightness, bonding strength and the corrosion resistance etc. of jointing, general jointing adopts traditional API helicitic texture usually, and it can not satisfy the requirement of aspects such as these oil gas well mining technology, safety.Traditional API tubing and casing connecting thread mainly contains round thread and two kinds of form of structure of trapezoidal thread, sealing after it connects is to be determined by the tightness degree that internal and external threads meshes, owing to form of thread structure Design and mismachining tolerance reason, always there is certain clearance between the screw thread of engagement, round thread mainly is to have the selenodont helical duct between at the bottom of internal and external threads crest and the tooth, and trapezoidal thread mainly is to have seam type gap helical duct between spigot surface.Because the existence of leakage path, in essence, this helicitic texture is not possess sealability, the screw thread that its sealing performance mainly relies on button to cause is out of shape, uses the thread surface coated metal and uses solid matter blind or helical duct in the thread sealing grease to obtain, so this sealing is subjected to the influence that shakes in make-up torque, filler quality, variations in temperature and the underground work and changes, so sealing effectiveness is undesirable, unreliable, can't normally use in the high environment of double thread seal request.The common API joint tubing and casing that use in present domestic oil field domesticizes substantially, no matter but special thread joint tubing and casing on the output, on the kind or qualitatively, all can not satisfy the needs in oil field far away, basically dependence on import.
The utility model content
The technical problems to be solved in the utility model is: the deficiency that overcomes prior art, a kind of tubing and casing connector is provided, and the special connecting thread structure that it has can make tubing and casing have higher bonding strength and better sealing performance, the exchange of realization and import parts is to satisfy the oil field user demand.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of tubing and casing connector, comprise body and box cupling, body has external screw thread, external seal face and end face, box cupling has internal thread, inner sealing surface and circular bead surface, the external seal face is between external screw thread and end face, inner sealing surface is between internal thread and circular bead surface, external screw thread and internal thread interconnect, end face and circular bead surface axial abutment, it is the buttress thread of positive-angle that the tooth form of described external screw thread and internal thread adopts bearing surface, described external seal face comprises with end face by external arc along slipping over the outer conical surface of crossing, inner sealing surface comprises with circular bead surface and crosses the convex arc surface that is connected by interior circular arc along slipping over that outer conical surface screws the primary seal structure that is connected formation interference afterwards mutually with convex arc surface at external screw thread and internal thread.
Furtherly, be to improve sealing effectiveness, described end face has identical inclination angle with circular bead surface and screws mutually at external screw thread and internal thread and is connected axially applying of back, the secondary hermetically-sealed construction that formation contacts.
Has the purpose of better sealing performance in order to make the primary seal structure form good interference fit to realize tubing and casing, the tapering of described outer conical surface is 1: 10, its big end is positioned at external screw thread one side, when convex arc surface screws in the process when contacting with outer conical surface at internal and external screw thread, along with screw thread is tightened, thrust between convex arc surface and the outer conical surface increases thereupon, thereby plays reliable sealing effect.
Simultaneously, go into button when external screw thread and internal thread are interconnected easily, be difficult for thread alternating, the tooth top of described external screw thread and internal thread is parallel to the tubing and casing central axis.
The beneficial effects of the utility model are: the utility model has adopted the coupling type connected mode, intensity after the connection is equal to body, major and minor hermetically-sealed construction is used in combination and has improved sealing reliability greatly, can provide and the independent suitable interior compressive resistance of body, the cooperation that contacts of end face and circular bead surface, have stronger degeneration-resistant to the moment of torsion function, make joint under Action of Combined Loads, still can keep the surface pressing on the circular bead surface, have sealing function simultaneously concurrently, the interior flat design of screw thread can effectively reduce gas or the turbulent phenomenon of liquid in pipeline, prevents energy loss.
Description of drawings
Below in conjunction with drawings and Examples 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 broken section enlarged drawing after Fig. 1 middle tube body and the box cupling assembling.
Circular arc 23. convex arc surface 24. interior changeover portions in 1. bodys, 11. end faces, 12. external arc, 13. outer conical surface, 14. outer changeover portion 2. box cuplings 21. circular bead surfaces 22. among the figure
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～a kind of oil jacket connector shown in Figure 4, it comprises body 1 and box cupling 2, body 1 has external screw thread, external seal face and end face 11, box cupling 2 has internal thread, inner sealing surface and circular bead surface 21, the external seal face is between external screw thread and end face 11, inner sealing surface is between internal thread and circular bead surface 21, and external screw thread and internal thread interconnect, end face 11 and circular bead surface 21 axial abutment.
The internal thread of the external screw thread of body 1 and box cupling 2 is mutually adaptive and be connected, wherein external screw thread is not done the surface processing, and interior threaded surface is carried out phosphatization or copper plating treatment and is produced the thread gluing phenomenon when preventing to connect, it is the buttress thread of positive-angle that the tooth form of screw thread adopts bearing surface, in the present embodiment, the spigot surface angle of this buttress thread is 10 °, the bearing surface angle is 3 °, suitably reduced the magnitude of interference when external screw thread is connected cooperation with internal thread during making, 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 screw thread and the tooth, go into button during connection easily, be difficult for thread alternating, guarantee to connect accurate.
The external seal face of described body 1 comprises with end face 11 by external arc 12 along slipping over the outer conical surface 13 of crossing, the inner sealing surface of box cupling 2 comprises with circular bead surface 21 and crosses the convex arc surface that is connected by interior circular arc 22 along slipping over, after body 1 and box cupling 2 are linked and packed, described outer conical surface 13 closely contacts the primary seal structure that forms interference with convex arc surface 23, 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 13 is chosen to be 1: 10 simultaneously, its big end is positioned at external screw thread one side, when connecting, along with screw thread is tightened, thrust between convex arc surface 23 and the outer conical surface 13 increases thereupon, both contact lengths are short simultaneously, reduce the possibility of bonding, helped guaranteeing that outer conical surface 13 and convex arc surface 23 form preferable interference fit, improved sealing effectiveness.
Be provided with outer changeover portion 14 between the outer conical surface 13 of body 1 and the external screw thread, these outer changeover portion 14 1 sides link to each other along sliding with outer conical surface 13, and opposite side is connected to the external screw thread initiating terminal; Changeover portion 24 in being provided with between the convex arc surface 23 of box cupling 2 and the internal thread, changeover portion 24 1 sides link to each other along sliding with convex arc surface 23 in this, and opposite side is connected to the end of internal thread.
For further improving sealing effectiveness, described end face 11 screws mutually at external screw thread and internal thread with circular bead surface 21 and is connected axially applying of back, forms the secondary hermetically-sealed construction of contact.The end face 11 of body 1 is exactly a torque resistant with the main effect of the shoulder structure that the circular bead surface of box cupling 2 21 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, the end face 11 of body 1 and the circular bead surface 21 of box cupling 2 have identical inclination angle-15 °, generally, the end face 11 of body 1 and the circular bead surface 21 axial joint places of box cupling 2, 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.
Tubing and casing connector 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; The conical surface and sphere radially primary seal structure and end face 11 and the circular bead surface 21 axial secondary hermetically-sealed constructions that contact applying are adopted in sealing, help improving sealing effectiveness; Torque shoulder adopts-15 ° reverse torque shoulder, has improved the composite bearing ability of joint.Use in the place that this tubing and casing connector 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 (5)
1. tubing and casing connector, comprise body (1) and box cupling (2), body (1) has external screw thread, external seal face and end face (11), box cupling (2) has internal thread, inner sealing surface and circular bead surface (21), the external seal face is positioned between external screw thread and the end face (11), inner sealing surface is positioned between internal thread and the circular bead surface (21), external screw thread and internal thread interconnect, end face (11) and circular bead surface (21) axial abutment, it is characterized in that: it is the buttress thread of positive-angle that the tooth form of external screw thread and internal thread adopts bearing surface, described external seal face comprise with end face (11) by the suitable outer conical surface (13) of crossing that slips over of external arc (12), inner sealing surface comprises with circular bead surface (21) and crosses the convex arc surface (23) that is connected by interior circular arc (22) along slipping over, and outer conical surface (13) and convex arc surface (23) screw at external screw thread and internal thread is close to the primary seal structure that forms interference after being connected.
2. a kind of tubing and casing connector according to claim 1 is characterized in that: described end face (11) screws mutually at external screw thread and internal thread with circular bead surface (21) and is connected axially applying of back, forms the secondary hermetically-sealed construction of contact.
3. oil casing threaded jointing according to claim 1 is characterized in that: described end face (11) has identical inclination angle with circular bead surface (21).
4. oil casing threaded jointing according to claim 1 is characterized in that: the tapering of described outer conical surface (13) is 1: 10, and its big end is positioned at external screw thread one side.
5. oil casing threaded jointing according to claim 1 is characterized in that: the tooth top of described external screw thread and internal thread is parallel to the tubing and casing central axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200463934U CN201412076Y (en) | 2009-06-09 | 2009-06-09 | Oil sleeve connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200463934U CN201412076Y (en) | 2009-06-09 | 2009-06-09 | Oil sleeve connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201412076Y true CN201412076Y (en) | 2010-02-24 |
Family
ID=41713962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200463934U Expired - Lifetime CN201412076Y (en) | 2009-06-09 | 2009-06-09 | Oil sleeve connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201412076Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278073A (en) * | 2011-04-25 | 2011-12-14 | 中国海洋石油总公司 | Water injection pipe for marine water injection well |
| CN103696704A (en) * | 2013-11-19 | 2014-04-02 | 山西环界石油钻具制造股份有限公司 | Dual-tooth-form gas-tight thread |
| CN105507824A (en) * | 2016-02-05 | 2016-04-20 | 上海尊优自动化设备有限公司 | Air-sealed threaded structure used in downhole tool and downhole tool |
| CN105822869A (en) * | 2016-06-14 | 2016-08-03 | 西南石油大学 | Buckling and bending resistant steel tube for construction |
| CN106089119A (en) * | 2016-06-03 | 2016-11-09 | 西南石油大学 | A kind of high-performance oil casing pipe special thread jointing |
-
2009
- 2009-06-09 CN CN2009200463934U patent/CN201412076Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278073A (en) * | 2011-04-25 | 2011-12-14 | 中国海洋石油总公司 | Water injection pipe for marine water injection well |
| CN103696704A (en) * | 2013-11-19 | 2014-04-02 | 山西环界石油钻具制造股份有限公司 | Dual-tooth-form gas-tight thread |
| CN103696704B (en) * | 2013-11-19 | 2016-06-15 | 山西环界石油钻具制造股份有限公司 | Bidentate type hermetic seal screw thread |
| CN105507824A (en) * | 2016-02-05 | 2016-04-20 | 上海尊优自动化设备有限公司 | Air-sealed threaded structure used in downhole tool and downhole tool |
| CN105507824B (en) * | 2016-02-05 | 2018-01-19 | 上海尊优自动化设备有限公司 | The hermetic seal helicitic texture and downhole tool that a kind of downhole tool uses |
| CN106089119A (en) * | 2016-06-03 | 2016-11-09 | 西南石油大学 | A kind of high-performance oil casing pipe special thread jointing |
| CN105822869A (en) * | 2016-06-14 | 2016-08-03 | 西南石油大学 | Buckling and bending resistant steel tube for construction |
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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 |
Granted publication date: 20100224 |
|
| CX01 | Expiry of patent term |