CN101672165A - Stretching-resisting bending-resisting double-sealed oil sleeve joint - Google Patents
Stretching-resisting bending-resisting double-sealed oil sleeve joint Download PDFInfo
- Publication number
- CN101672165A CN101672165A CN200910145100A CN200910145100A CN101672165A CN 101672165 A CN101672165 A CN 101672165A CN 200910145100 A CN200910145100 A CN 200910145100A CN 200910145100 A CN200910145100 A CN 200910145100A CN 101672165 A CN101672165 A CN 101672165A
- Authority
- CN
- China
- Prior art keywords
- thread piece
- sealing
- oil sleeve
- resisting
- sealed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A stretching-resisting bending-resisting double-sealed oil sleeve joint comprises an oil sleeve and a coupling joint which are tightly and fixedly connected into a whole through a thread; two channelsof sealing structures are arranged between the oil sleeve and the coupling joint; the main sealing structure is a cylindrical seal and the auxiliary sealing structure is an end surface ball seal; themain sealing structure is an interference sealing structure which is formed between the excircle sealing section of the oil sleeve connection end and the inner bore sealing section of the coupling joint; the auxiliary sealing structure is an interference sealing structure which is formed by the screwing of the spherical surface of the oil sleeve end part and the spherical surface of a coupling inner bore end part; when the oil sleeve and the coupling joint are in a stretching state, the cylindrical section seal is always effected; and when the oil sleeve and the coupling joint are in a force-bearing bending state, the sealing position of the end part spherical surface is still in an effective sealing state, thereby thoroughly solving the sealing failure problem of the oil sleeve in the stretching state and the force-bearing bending state.
Description
Technical field
The present invention relates to the connector of oil, natural gas probing usefulness oil pipe and sleeve pipe, relate in particular to a kind of casing joint with tension sealing performance.
Background technology
Must use steel sleeve pipe and oil pipe in oil, the natural 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 connector 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 external screw thread and screwing of box cupling internal thread, the thread forms that connects has more than 100 kind of button-type at present, comprise angular thread, trapezoidal thread, monolateral trapezoidal thread, rectangular thread, T shape screw thread etc., but their hermetically-sealed construction form all is to realize that by the end face of tubing and casing and box cupling inner face sealing means screw thread only plays interconnect function.Mainly there is following defective in actual use in this connection hermetically-sealed construction:
1. in 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 junction 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 sealing performance under the case of bending are the global problems during tubing and casing is produced.
Summary of the invention
The purpose of this invention is to provide a kind of stretching-resisting bending-resisting double-sealed oil sleeve joint, it forms face of cylinder sealing and the sealing of end face ball in tubing and casing between the box cupling joint, be in the sealing performance that can both guarantee under stretching or the case of bending between tubing and casing and the box cupling when tubing and casing.
The technical scheme that the present invention takes is as follows:
A kind of stretching-resisting bending-resisting double-sealed 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, link at external thread piece 1 is provided with connection external screw 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 the two seals structure, the primary seal structure is column sealed, secondary hermetically-sealed construction is the sealing of end face ball, and the primary seal structure is provided with the interference hermetically-sealed construction 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 link; Screw the interference hermetically-sealed construction that the back forms between the interior hole end surface sphere 23 of secondary hermetically-sealed construction by the pipe end sphere 13 of external thread piece 1 and inner thread piece 2.
Further, the column sealed magnitude of interference is 0.02～0.08 millimeter, and the axial length of sealing is 0.5～30 millimeter; The contact radius of end face ball sealing is 1/2 of a tubing and casing wall thickness.
Owing between external thread piece 1 and inner thread piece 2, set up cylindrical section sealing and the sealing of end face ball, rely on screw thread to be fastenedly connected between external thread piece 1 and the inner thread piece 2, cylindrical section seal section, end face ball sealing two seals between external thread piece 1 and inner thread piece 2, have been formed, and cylindrical section is sealed with long seal section, when being 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; When being in stressed case of bending between external thread piece 1 and the inner thread piece 2, sealing place of end face ball can not lost efficacy yet, thereby has thoroughly solved tubing and casing under the counter-rotating tension state or the seal failure difficult problem under the stressed case of bending.
Description of drawings
Fig. 1 is the nipple schematic diagram between external thread piece of the present invention 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 hermetically-sealed construction enlarged diagram (before spinning);
Fig. 4 is for being threaded between external thread piece and the inner thread piece and hermetically-sealed construction enlarged diagram (back spins); Among the figure: the 1-external thread piece; The 2-inner thread piece; 11-connects external screw thread; 12-cylindrical seal section; 13-pipe end sphere; 21-connects internal thread; 22-endoporus seal section; Hole end surface sphere in the 23-; α is a screw thread load side angle; β is the guiding side angle degree of screw thread.
The specific embodiment
Illustrate the specific embodiment of the present invention below in conjunction with accompanying drawing:
A kind of stretching-resisting bending-resisting double-sealed 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 external screw 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 gas thread between the two, the tapering of taper pipe thread is 1: 16, load side angle [alpha]=+ 3 of form of thread °, 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 two seal structures, the primary seal structure is column sealed, secondary hermetically-sealed construction is the sealing of end face ball, the primary seal structure is provided with the interference hermetically-sealed construction 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 link, 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 hermetically-sealed construction that the back forms between the interior hole end surface sphere 23 of secondary hermetically-sealed construction by the pipe end sphere 13 of external thread piece 1 and inner thread piece 2, its contact surface radius is 1/2 of a thickness of steel pipe; As shown in Figure 3, Figure 4.
Along with petroleum industry is abominable to geological conditions, 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, bending resistance is absolutely necessary, and its demand will rise gradually.
Claims (2)
1, a kind of stretching-resisting bending-resisting double-sealed oil sleeve joint, comprise external thread piece (1) and inner thread piece (2), link at external thread piece (1) is provided with connection external screw 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 the two seals structure, the primary seal structure is column sealed, secondary hermetically-sealed construction is the sealing of end face ball, and the primary seal structure is provided with the interference hermetically-sealed construction 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) link; Screw the interference hermetically-sealed construction that the back forms between the interior hole end surface sphere (23) of secondary hermetically-sealed construction by external thread piece (1) pipe end sphere (13) and inner thread piece (2).
2, according to the described a kind of stretching-resisting bending-resisting double-sealed oil sleeve joint of claim 1, it is characterized in that: the column sealed magnitude of interference is 0.05～0.30 millimeter, and the axial length of sealing is 0.2～30 millimeter; The contact radius of end face ball sealing is 1/2 of a tubing and casing wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910145100A CN101672165A (en) | 2009-09-25 | 2009-09-25 | Stretching-resisting bending-resisting double-sealed oil sleeve joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910145100A CN101672165A (en) | 2009-09-25 | 2009-09-25 | Stretching-resisting bending-resisting double-sealed oil sleeve joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101672165A true CN101672165A (en) | 2010-03-17 |
Family
ID=42019545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910145100A Pending CN101672165A (en) | 2009-09-25 | 2009-09-25 | Stretching-resisting bending-resisting double-sealed oil sleeve joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101672165A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060657A (en) * | 2017-06-13 | 2017-08-18 | 天津钢管集团股份有限公司 | The attachment structure of aluminium alloy coring tool inner cylinder nipple |
| CN107939290A (en) * | 2017-12-11 | 2018-04-20 | 德州联合石油科技股份有限公司 | A kind of static state guiding type rotary steering drilling tool executing agency |
-
2009
- 2009-09-25 CN CN200910145100A patent/CN101672165A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060657A (en) * | 2017-06-13 | 2017-08-18 | 天津钢管集团股份有限公司 | The attachment structure of aluminium alloy coring tool inner cylinder nipple |
| CN107060657B (en) * | 2017-06-13 | 2023-07-04 | 天津钢管制造有限公司 | Connection structure of screwed joint for inner barrel of aluminum alloy coring tool |
| CN107939290A (en) * | 2017-12-11 | 2018-04-20 | 德州联合石油科技股份有限公司 | A kind of static state guiding type rotary steering drilling tool executing agency |
| CN107939290B (en) * | 2017-12-11 | 2024-01-05 | 德州联合石油科技股份有限公司 | Static pointing type rotary steering drilling tool actuating mechanism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201547428U (en) | Three-dimensional seal tensile oil bushing connector | |
| CN203531777U (en) | High-quality airtight seal oil casing threaded joint | |
| CN105604499B (en) | A kind of direct linkage type double step nipple | |
| CN201322148Y (en) | High performance oil pipe hermetic seal threaded connection structure | |
| CN202900066U (en) | Externally-flush geological drill rod using double-top double-cone connection form | |
| CN201322147Y (en) | Connection structure for small-clearance collar and casing threads | |
| CN101672165A (en) | Stretching-resisting bending-resisting double-sealed oil sleeve joint | |
| CN204139992U (en) | A kind of gas well at HTHP hermetic seal threaded connection structure of petroleum casing pipe | |
| CN202039786U (en) | Connecting structure for high-pressure well completion oil pipe | |
| CN201502334U (en) | Tensile and bending resistant double sealed oil bushing connector | |
| CN202125258U (en) | Oil sleeve connector with high sealing performance and thread-gluing resistance | |
| CN101899953A (en) | Thread joint structure for high-performance oil casing | |
| CN101672166A (en) | Tri-dimensional sealed tensile oil sleeve joint | |
| CN202165026U (en) | Sealing structure for underground tool pipe joint | |
| CN104405297B (en) | There is the segmented oil drill rocker sealing structure | |
| CN201756919U (en) | Threaded connection structure for operation oil pipe | |
| CN102287143B (en) | Oil/sleeve pipe threaded connection joint with air-tight structure | |
| CN201103350Y (en) | Screwed tie-in of oil casing tube for deep mine | |
| CN103556956A (en) | Self-adaptive screw thread structure for high sealing performance oil pipe | |
| CN102352727A (en) | 8TPI oil or casing pipe threaded connector | |
| CN102996079A (en) | Tubular air sealing screwed joint and application thereof | |
| CN205936433U (en) | Oil conduit screw connection structure | |
| CN204738758U (en) | Special screwed joint is used to HTHP oil gas well | |
| CN201778666U (en) | Coupling-free petroleum casing pipe | |
| CN206329281U (en) | Inside and outside pressure pipe body Hermetical connecting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100317 |