CN201547428U - Three-dimensional seal tensile oil bushing connector - Google Patents
Three-dimensional seal tensile oil bushing connector Download PDFInfo
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- CN201547428U CN201547428U CN2009201877994U CN200920187799U CN201547428U CN 201547428 U CN201547428 U CN 201547428U CN 2009201877994 U CN2009201877994 U CN 2009201877994U CN 200920187799 U CN200920187799 U CN 200920187799U CN 201547428 U CN201547428 U CN 201547428U
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Abstract
A three-dimensional seal tensile oil bushing connector comprises an oil bushing and a coupling connector which are tightly connected into a whole through screw threads, wherein a three-stage sealing structure is arranged between the oil bushing and the coupling connector, a main sealing structure is a cylindrical seal, an auxiliary sealing structure is an end surface seal, a third sealing structure is a conical seal, the main sealing structure is an interference sealing structure formed between an excircle sealing section at the connecting end of the oil bushing and an inner hole sealing section of the coupling connector, the auxiliary sealing structure is an interference sealing structure formed after tightly screwing the end surface of the oil bushing and the inner hole end surface of the coupling connector, and the conical seal is an interference sealing structure formed by arranging inner conical surfaces on the outer conical surface of the connecting end of the oil bushing and the inner hole end surface of the coupling connector. Even if the space between the oil bushing and the coupling connector is under the state of tensile load, the three-stage sealing positions can not simultaneously fail, the cylindrical seal is effective throughout, thereby completely solving the difficult problem of sealing failure under the state of anticlockwise rotation and tension.
Description
Technical field
The utility model relates to oil, rock gas is drilled the link with oil pipe and sleeve pipe, relates in particular to a kind of sleeve joint with tension sealability.
Background technique
Must use steel sleeve pipe and oil pipe in oil, the rock gas drilling process, its middle sleeve refers to be used for after the drilling well pipe of lining, and effect is to prevent that the borehole wall from flowing and subsiding; Oil pipe is used to gather oil and natural gas, and downhole fluid is delivered to surface of stratum by oil pipe; The link of oil pipe, sleeve pipe lengthening claims box cupling.Continuous increase along with the drilling degree of depth, tubing and casing must extend thereupon, the lengthening of oil pipe, sleeve pipe is to realize by tubing and casing body end outside thread and screwing of box cupling internal thread, the thread forms that connects has more than 100 kind of button-type at present, comprise v thread, trapezoidal thread, monolateral trapezoidal thread, square threaded form, T shape screw thread etc., but their sealing configuration form all is to realize that by the end face of tubing and casing and box cupling interior edge face sealing means screw thread only plays interconnect function.Mainly there is following defective in actual use in this connection sealing configuration:
1. in the drilling process, tubing and casing should just be changeed counter-rotating again, and tubing and casing is in process is gone into the well in probing, the resistance suffered at the different depth layer has nothing in common with each other, when the suffered resistance in the joint of tubing and casing and box cupling not simultaneously, especially when the tubing and casing counter-rotating is transferred to, very easily produce between tubing and casing and the box cupling and become flexible, thereby original end face seal was lost efficacy;
2. when tubing and casing was subjected to bending resistance, tubing and casing was easy to generate bending, and seal failure easily takes place.The stretching of solution tubing and casing and the sealability under the bent state are the global problems during tubing and casing is produced.
The model utility content
The purpose of this utility model provides a kind of tri-dimensional sealed tensile oil sleeve joint, and it forms three seals between oil pipe, sleeve pipe and box cupling, can make tubing and casing guarantee sealability between oil pipe, sleeve pipe and the box cupling under extended state.
The technological scheme that the utility model is taked is as follows:
A kind of tri-dimensional sealed tensile oil sleeve joint, comprise external thread piece 1 and inner thread piece 2, external thread piece 1 is the tubing and casing body, inner thread piece 2 is described box cupling, connecting end at external thread piece 1 is provided with connection outside thread 11, on inner thread piece 2, be provided with and connect internal thread 21, between the two by the coupling screw threads for fastening link into an integrated entity, it is characterized in that: between external thread piece 1 and inner thread piece 2, be provided with three seal structures, the primary seal structure is column sealed, secondary sealing configuration is end face seal, the 3rd sealing configuration is a conical surface seal, and the primary seal structure is provided with the interference sealing configuration that forms between the endoporus seal section 22 that cylindrical seal section 12 and inner thread piece 2 be provided with by external thread piece 1 connecting end; Screw the interference sealing configuration that the back forms between the interior hole end surface 23 that secondary sealing configuration is provided with by the external thread piece end face 13 and the inner thread piece 2 of external thread piece 1; Described conical surface seal is to be provided with inner conical surface 24 formed interference sealing configurations by hole end surfaces in the male cone (strobilus masculinus) 14 of external thread piece 1 connecting end and the inner thread piece 2.
Further, column sealed magnitude of interference is 0.02～0.08 millimeter, and the axial length of sealing is 0.5～30 millimeter; The interface width of end face seal structure is 2～5 millimeters; In the conical surface seal structure, the end face cone angle of external thread piece 1 than inner thread piece 2 be provided with the inner conical surface cone angle big 0.5 °～1 °.
Owing between external thread piece 1 and inner thread piece 2, set up the cylindrical section sealing, end face seal and conical surface seal three seal structures, rely on screw thread to be fastenedly connected between external thread piece 1 and the inner thread piece 2, make the cylindrical section seal section, end face seal and conical surface seal form three road interference sealings, and cylindrical section is sealed with long seal section, even be in the counter-rotating tension state between external thread piece 1 and the inner thread piece 2, the cylindrical section sealing is effectively sealing all the time, can not lose efficacy simultaneously in the three seals place, thereby thoroughly solved the seal failure difficult problem of internal thread under the counter-rotating tension state of tubing and casing outside thread and box cupling.
Description of drawings
Fig. 1 is the inipple schematic representation between external thread piece of the present utility model and the inner thread piece;
Fig. 2 is a kind of structural representation of connecting thread;
Fig. 3 is for being threaded between external thread piece and the inner thread piece and sealing configuration enlarged diagram (before spinning);
Fig. 4 is for being threaded between external thread piece and the inner thread piece and sealing configuration enlarged diagram (back spins);
Among the figure: the 1-external thread piece; The 2-inner thread piece; 11-connects outside thread; 12-cylindrical seal section; 13-external thread piece end face; The 14-male cone (strobilus masculinus); 21-connects internal thread; 22-endoporus seal section; Hole end surface in the 23-; The 24-inner conical surface; α is a screw thread load side angle; β is the guiding side angle degree of screw thread; θ 11 is the cone angle of external thread piece end face; θ 21 is the inner conical surface cone angle.
Embodiment
Illustrate embodiment of the present utility model below in conjunction with accompanying drawing:
A kind of tri-dimensional sealed tensile oil sleeve joint, as shown in Figure 1, it comprises external thread piece 1 and inner thread piece 2, linkage section at external thread piece 1 is provided with trapezoidal partially Taper Pipe connection outside thread 11, on inner thread piece 2, be provided with trapezoidal partially Taper Pipe and connect internal thread 21, securely link into an integrated entity by inclined to one side trapezoidal tapers pipe thread between the two, the tapering of taper pipe thread is 1: 16, load side angle [alpha]=+ 3 of thread profile °, guiding side angle beta=+ 10 °, tooth top and tooth root are parallel to bus, for its pitch of sleeve pipe is 5.08mm, and promptly 5 teeth/per inch is 3.175mm for its pitch of oil pipe, i.e. 8 teeth/per inch, as shown in Figure 2; Between external thread piece 1 and inner thread piece 2, be provided with three seal structures, the primary seal structure is column sealed, secondary sealing configuration is end face seal, the 3rd sealing configuration is a conical surface seal, the primary seal structure is provided with the interference sealing configuration that forms between the endoporus seal section 22 that cylindrical seal section 12 and inner thread piece 2 be provided with by external thread piece 1 connecting end, its magnitude of interference is 0.02～0.08 millimeter, in this example, the diameter of cylindrical seal section 12 is bigger 0.02～0.08 millimeter than the diameter of endoporus seal section 22, and the axial length of sealing is 0.5～30 millimeter; Screw the interference sealing configuration that the back forms between the interior hole end surface 23 that secondary sealing configuration is provided with by the external thread piece end face 13 and the inner thread piece 2 of external thread piece 1, its interface width is 2～5 millimeters; Described conical surface seal is to be provided with the formed interference sealing configuration of the conical surface by the end face conical surface of external thread piece 1 and inner thread piece 2 interior edge faces, the taper angle theta 11 of external thread piece 1 end face than inner thread piece 2 be provided with the inner conical surface taper angle theta 21 big 0.5 °～1 °, the value of θ 11 is between 5 °～10 °, as shown in Figure 3, Figure 4.
Along with petroleum industry is abominable to geological condition, the exploration and development of the deep-well of hole condition condition harshness, ultradeep well, high-pressure oil-gas well, and directional well, water filling thermal production well The Application of Technology, the oil sleeve joint that possesses the high sealing performance of tension compression resistance is absolutely necessary, and its demand will rise gradually.
Claims (2)
1. tri-dimensional sealed tensile oil sleeve joint, comprise external thread piece (1) and inner thread piece (2), connecting end at external thread piece (1) is provided with connection outside thread (11), on inner thread piece (2), be provided with and connect internal thread (21), between the two by screw threads for fastening link into an integrated entity, it is characterized in that: between external thread piece (1) and inner thread piece (2), be provided with three seal structures, the primary seal structure is column sealed, secondary sealing configuration is end face seal, the 3rd sealing configuration is a conical surface seal, the interference sealing configuration that forms between the endoporus seal section (22) of primary seal structure by the cylindrical seal section (12) of external thread piece (1) connecting end and inner thread piece (2); Screw the interference sealing configuration that then forms between the interior hole end surface (23) of secondary sealing configuration by the external thread piece end face (13) of external thread piece (1) and inner thread piece (2); Described conical surface seal is the formed interference sealing configuration of inner conical surface (24) that is provided with by the male cone (strobilus masculinus) (14) of external thread piece (1) connecting end and the interior hole end surface of inner thread piece (2).
2. according to the described a kind of tri-dimensional sealed tensile oil sleeve joint of claim 1, it is characterized in that: column sealed magnitude of interference is 0.02～0.08 millimeter, and the axial length of sealing is 0.5～30 millimeter; The interface width of end face seal structure is 2～5 millimeters; The cone angle of external thread piece in the conical surface seal structure (1) end face than inner thread piece (2) be provided with the inner conical surface cone angle big 0.5 °～1 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201877994U CN201547428U (en) | 2009-09-25 | 2009-09-25 | Three-dimensional seal tensile oil bushing connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201877994U CN201547428U (en) | 2009-09-25 | 2009-09-25 | Three-dimensional seal tensile oil bushing connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201547428U true CN201547428U (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201877994U Expired - Lifetime CN201547428U (en) | 2009-09-25 | 2009-09-25 | Three-dimensional seal tensile oil bushing connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201547428U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672166A (en) * | 2009-09-25 | 2010-03-17 | 江苏常宝普莱森钢管有限公司 | Three-dimensional sealed tensile oil casing joint |
| CN102720440A (en) * | 2012-06-16 | 2012-10-10 | 无锡西姆莱斯石油专用管制造有限公司 | High-sealed BCSG joint |
| CN102926669A (en) * | 2012-12-04 | 2013-02-13 | 江苏常宝普莱森钢管有限公司 | Triple sealing structure for lengthening steel pipes through direct connection and rotary connection |
| CN104563904A (en) * | 2014-12-31 | 2015-04-29 | 达力普石油专用管有限公司 | Sealing connecting structure of casing of gas well |
| CN108952595A (en) * | 2018-06-01 | 2018-12-07 | 江苏常宝钢管股份有限公司 | A kind of air-tight seal screw joint |
-
2009
- 2009-09-25 CN CN2009201877994U patent/CN201547428U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672166A (en) * | 2009-09-25 | 2010-03-17 | 江苏常宝普莱森钢管有限公司 | Three-dimensional sealed tensile oil casing joint |
| CN102720440A (en) * | 2012-06-16 | 2012-10-10 | 无锡西姆莱斯石油专用管制造有限公司 | High-sealed BCSG joint |
| CN102720440B (en) * | 2012-06-16 | 2015-09-02 | 无锡西姆莱斯石油专用管制造有限公司 | High sealability buttress thread casing joint |
| CN102926669A (en) * | 2012-12-04 | 2013-02-13 | 江苏常宝普莱森钢管有限公司 | Triple sealing structure for lengthening steel pipes through direct connection and rotary connection |
| CN104563904A (en) * | 2014-12-31 | 2015-04-29 | 达力普石油专用管有限公司 | Sealing connecting structure of casing of gas well |
| CN108952595A (en) * | 2018-06-01 | 2018-12-07 | 江苏常宝钢管股份有限公司 | A kind of air-tight seal screw joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100811 |
|
| CX01 | Expiry of patent term |