CN211144403U - Direct-connection type oil casing joint and oil well pipe column - Google Patents
Direct-connection type oil casing joint and oil well pipe column Download PDFInfo
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- CN211144403U CN211144403U CN202021129551.5U CN202021129551U CN211144403U CN 211144403 U CN211144403 U CN 211144403U CN 202021129551 U CN202021129551 U CN 202021129551U CN 211144403 U CN211144403 U CN 211144403U
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Abstract
The utility model provides a direct-connection type oil casing joint and an oil well pipe column, which relates to the technical field of oil casing threaded connection joints, and the direct-connection type oil casing joint comprises a male buckle and a female buckle; the outer wall of the pin is sequentially provided with a first thread, a first cylindrical surface and a first torque shoulder, and the inner wall of the box is sequentially provided with a second thread, a second cylindrical surface and a second torque shoulder; the first thread can be meshed with the second thread, and the first cylindrical surface is in clearance fit with the second cylindrical surface; the first torque shoulder compresses against the second torque shoulder to form a sealing surface. The outer wall of the female buckle is provided with an upsetting transition section. The oil well string includes a direct connection type oil casing joint. The technical effect of convenient processing is achieved.
Description
Technical Field
The utility model relates to an oil casing threaded connection connects technical field particularly, relates to a directly link type oil casing joint and oil well tubular column.
Background
The old well is in service for years, the casing pipe column is subjected to the effects of various loads in the operation process for a long time and the stress effect generated by the change of the stratum structure, so that the pipe column is structurally changed in bending, deformation and the like, the internal space is reduced, and the conventional tubing coupling can not pass through the casing pipe column easily.
A number of direct connection type oil casing joints are available to meet this requirement. The common measures in the prior art are as follows: the traditional coupling connecting structure is changed into a direct connection structure, the outer diameter is smaller than that of the coupling, and the casing with limited space can be run into the coupling. The torque shoulder is arranged, and after the internal thread and the external thread are screwed, the torque shoulder can form certain contact pressure to play a role in absorbing torque energy and assisting sealing.
However, the structure is a right-angle torque shoulder, and the problem that the cutter is not withdrawn in advance in the process of machining the internal thread is difficult to achieve. The difficulty of processing is greatly increased to realize the structure.
Therefore, it is an important technical problem to be solved by those skilled in the art to provide a direct connection type oil casing joint and oil well string with low processing difficulty.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a directly link type oil casing joint and oil well tubular column to alleviate the big technical problem of the processing degree of difficulty among the prior art.
In a first aspect, an embodiment of the present invention provides a direct connection type oil casing joint, which includes a male buckle and a female buckle;
the outer wall of the male buckle is sequentially provided with a first thread, a first cylindrical surface and a first torque shoulder, and the inner wall of the female buckle is sequentially provided with a second thread, a second cylindrical surface and a second torque shoulder;
the first thread can be in threaded connection with the second thread, and the first cylindrical surface is in clearance fit with the second cylindrical surface;
the first torque shoulder compresses against the second torque shoulder to form a sealing surface.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the first thread includes a thread vanishing point, an incomplete thread section, and a complete thread section, which are sequentially arranged, and the complete thread section is located at a side of the incomplete thread section close to the first torque shoulder;
the diameter of the thread vanishing point is equal to the outer diameter of the pin.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a length of the first cylindrical surface is not less than a length of the second cylindrical surface;
the lengths of the first cylindrical surface and the second cylindrical surface are both 5mm-10 mm.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the taper of the first thread and the taper of the second thread are both 1: 16.
in combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the first torque shoulder and the second torque shoulder both adopt right-angle shoulders.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the first torque shoulder and the second torque shoulder are both-15 ° shoulders.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the outer wall of the box is provided with an upsetting transition section.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the angle of the upsetting transition section is between 5 ° and 45 °.
In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein an inner diameter of the male buckle is equal to an inner diameter of the female buckle.
In a second aspect, an embodiment of the present invention provides an oil well pipe string, including a direct connection type oil casing joint.
Has the advantages that:
the embodiment of the utility model provides a direct-connected oil casing joint, which comprises a male buckle and a female buckle; the outer wall of the pin is sequentially provided with a first thread, a first cylindrical surface and a first torque shoulder, and the inner wall of the box is sequentially provided with a second thread, a second cylindrical surface and a second torque shoulder; the first thread can be in threaded connection with the second thread, and the first cylindrical surface is in clearance fit with the second cylindrical surface; the first torque shoulder compresses against the second torque shoulder to form a sealing surface.
It is specific, thereby link together pin and box through first screw thread and second thread engagement, first face of cylinder and the second face of cylinder of setting between second screw thread and second moment of torsion circular bead through setting up between first screw thread and first moment of torsion circular bead, can guarantee that the second screw thread is gone up in the box and is added man-hour can not take place to interfere with second moment of torsion circular bead, consequently can not harm second moment of torsion circular bead, consequently, the second screw thread adds the time space greatly increased of moving back of a knife during processing, very big reduction processing degree of difficulty, thereby can guarantee that first moment of torsion circular bead on first screw thread and second screw thread twist-on-process pin can compress tightly with the second moment of torsion circular bead on the box and form sealed face.
An embodiment of the utility model provides an oil well tubular column, include a direct-connected type oil casing connects. The well string has the above-mentioned advantages over the prior art and will not be described in detail here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a direct-connection type oil casing joint according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a male buckle in a direct-connection type oil casing joint according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a box in a direct-connection type oil casing joint provided by an embodiment of the present invention.
Icon:
100-male buckle; 110-a first thread; 120-a first cylindrical surface; 130-a first torque shoulder;
200-female buckle; 210-a second thread; 220-a second cylindrical surface; 230-a second torque shoulder;
310-thread vanishing point; 320-incomplete thread segments; 330-complete thread section;
400-upsetting the transition section;
500-sealing surface.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Referring to fig. 1, 2 and 3, the present embodiment provides a direct connection type oil casing joint, including a pin 100 and a box 200; the outer wall of the pin 100 is sequentially provided with a first thread 110, a first cylindrical surface 120 and a first torque shoulder 130, and the inner wall of the box 200 is sequentially provided with a second thread 210, a second cylindrical surface 220 and a second torque shoulder 230; the first thread 110 can be in threaded connection with the second thread 210, and the first cylindrical surface 120 is in clearance fit with the second cylindrical surface 220; first torque shoulder 130 compresses against second torque shoulder 230 to form sealing surface 500.
Specifically, the pin 100 and the box 200 are connected together by engaging the first threads 110 and the second threads 210, and the first cylindrical surface 120 arranged between the first threads 110 and the first torque shoulder 130 and the second cylindrical surface 220 arranged between the second threads 210 and the second torque shoulder 230 can ensure that the second threads 210 on the box 200 do not interfere with the second torque shoulder 230 during machining, so that the second torque shoulder 230 is not damaged, the tool retracting space during machining the second threads 210 is greatly increased, the machining difficulty is greatly reduced, and the first torque shoulder 130 on the pin 100 and the second torque shoulder 230 on the box 200 can be pressed to form the sealing surface 500 during screwing the first threads 110 and the second threads 210.
The first torque shoulder 130 is located at an end of the pin 100, and the first cylindrical surface 120 is located between the first torque shoulder 130 and the first thread 110, so that the first cylindrical surface 120 forms a thread-free guiding section at one end of the front end of the pin 100, and when the pin 100 is screwed with the box 200, the first cylindrical surface 120 is provided to facilitate guiding and fastening, so that cross fastening is not easy to occur, and the screwing process is facilitated.
Moreover, after the connection between the pin 100 and the box 200 is completed, the first cylindrical surface 120 of the pin 100 and the second cylindrical surface 220 of the box 200 are in clearance fit, so that the first cylindrical surface 120 of the pin 100 and the second cylindrical surface 220 of the box 200 do not form the sealing surface 500, thereby reducing the processing requirements on the first cylindrical surface 120 of the pin 100 and the second cylindrical surface 220 of the box 200, reducing the processing cost, and improving the production efficiency. The first cylindrical surface 120 of the pin 100 and the second cylindrical surface 220 of the box 200 may be in transition fit or in clearance fit, and those skilled in the art can select the first cylindrical surface according to actual requirements.
In the prior art, because the external thread (the first thread 110) of the pin 100 is arranged on the end surface of the pin 100, the distance between the internal thread (the second thread 210) of the box 200 and the torque shoulder is very close, and theoretically, the termination point of the internal thread (the second thread 210) of the box 200 is located on the torque shoulder, so that it is difficult to perform tool withdrawal in advance in the process of processing the internal thread (the second thread 210) of the box 200, if the tool withdrawal is performed in advance, the end surface of the external thread (the first thread 110) of the pin 100 cannot be contacted with the torque shoulder of the box 200 in the process of screwing and connecting the threads, and therefore, the sealing effect cannot be realized, and the processing difficulty can be greatly increased if the connection structure is realized, and the manufacturing cost is greatly improved. The direct-connection type oil sleeve joint provided by the embodiment can enable the second thread 210 to be far away from the torque shoulder through the arrangement of the first cylindrical surface 120 and the second cylindrical surface 220, so that the normal processing of the second thread 210 can be ensured, the processing difficulty of the second thread 210 can be reduced, the normal tool withdrawal in the processing process of the second thread 210 can be ensured, and the integrity and the precision of the second thread 210 can be ensured; when the pin 100 is connected with the box 200, because the first cylindrical surface 120 and the second cylindrical surface 220 are arranged to extend forward by a distance corresponding to the first torque shoulder 130, the first torque shoulder 130 at the front end of the pin 100 can be pressed against the second torque shoulder 230 of the box 200 after the first thread 110 and the second thread 210 are connected.
The first cylindrical surface 120 and the second cylindrical surface 220 are in clearance fit, so that the first cylindrical surface 120 and the second cylindrical surface 220 do not have a sealing function, and the precision requirement on the first cylindrical surface 120 and the second cylindrical surface 220 is very low.
Wherein the thread chamfers of the first thread 110 and the second thread 210 are both set between 25-30.
Referring to fig. 1, 2 and 3, in an alternative embodiment of the present invention, the first thread 110 includes a thread vanishing point 310, an incomplete thread section 320 and a complete thread section 330, which are sequentially arranged, and the complete thread section 330 is located on a side of the incomplete thread section 320 close to the first torque shoulder 130; the diameter at the thread vanishing point 310 is equal to the outer diameter of the pin 100.
Specifically, the first thread 110 is processed in a full-retracting processing manner, so that a thread vanishing point 310, an incomplete thread section 320 and a complete thread section 330 are formed, and the diameter of the thread vanishing point 310 is equal to the outer diameter of the pin 100; after the first thread 110 is connected with the second thread 210, stress concentration caused by constraint at the relief angle when the first thread 110 is in screwing fit with the second thread 210 can be eliminated.
Referring to fig. 1, 2 and 3, in an alternative of the present embodiment, the length of the first cylindrical surface 120 is not less than the length of the second cylindrical surface 220; the length of the first cylindrical surface 120 and the second cylindrical surface 220 are both between 5mm and 10 mm.
Specifically, the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 may be set to be the same, or the length of the first cylindrical surface 120 may be greater than the length of the second cylindrical surface 220, which may be selected by a person skilled in the art according to actual situations.
For example, the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 are equal, and those skilled in the art can set the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 to be 5mm according to actual requirements; the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 are equal, and those skilled in the art can set the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 to be 6mm according to actual requirements; the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 are equal, and those skilled in the art can set the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 to be 7mm according to actual requirements; the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 are equal, and those skilled in the art can set the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 to be 8mm according to actual requirements; the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 are equal, and those skilled in the art can set the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 to be 9mm according to actual requirements; the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 are equal, and those skilled in the art can set the lengths of the first cylindrical surface 120 and the second cylindrical surface 220 to 10mm according to actual requirements.
Specifically, the taper of the first thread 110 and the taper of the second thread 210 are both 1: 16.
referring to fig. 1, 2 and 3, an alternative to this embodiment is to use a right angle shoulder for both the first torque shoulder 130 and the second torque shoulder 230.
Specifically, the first torque shoulder 130 on the pin 100 and the second torque shoulder 230 on the box 200 are both provided as right angle shoulders.
In an alternative to this embodiment, a-15 shoulder is used for both the first torque shoulder 130 and the second torque shoulder 230.
Specifically, when a well condition with a large bending load or other protruding load is encountered, the first torque shoulder 130 on the pin 100 and the second torque shoulder 230 on the box 200 may be provided with shoulders which may be designed to be-15 ° or in other structural patterns.
Referring to fig. 1, 2 and 3, in an alternative to this embodiment, the outer wall of the box 200 is provided with an upset transition 400.
Specifically, the upset transition section 400 provided on the outer wall of the box 200 can effectively improve the structural strength of the box 200. And need not to set up the strengthening rib at box 200 outer wall like prior art, and in the in-service use process, because the strengthening rib among the prior art is fixed on box 200 for welding or other connected modes, very easily take place to drop in the pit after receiving external world to collide with, arouse the production accident, lead to compelled shut down and salvage, cause economic loss.
Referring to FIGS. 1, 2 and 3, in an alternative to this embodiment, the upset transition 400 is angled between 5 and 45.
Specifically, the angle of the upset transition 400 may be selected by one of ordinary skill in the art, as desired. For example: the transition section of the upsetting transition section 400 with an angle of 15 degrees can reduce stress concentration of the upsetting section and ensure the integral quality stability of the internal thread end.
Referring to fig. 1, 2 and 3, in an alternative embodiment, the pin 100 has an inner diameter equal to that of the box 200.
Specifically, the inner diameter of the male buckle 100 and the inner diameter of the female buckle 200 are set to be consistent, and through the arrangement, when oil, gas and other injected produced media pass through the direct-connection type oil casing joint provided by the embodiment, turbulence generated by the oil, gas and other injected produced media is reduced or even avoided, so that the corrosion resistance of the direct-connection type oil casing joint provided by the embodiment is improved.
In addition, the inner walls of the male buckle 100 and the female buckle 200 are smooth and have no bulges, and when oil, gas and other injected and produced media pass through the direct-connected oil casing joint provided by the embodiment, turbulence generated by the oil, gas and other injected and produced media is reduced or even avoided, so that the corrosion resistance of the direct-connected oil casing joint provided by the embodiment is improved.
The embodiment provides an oil well string, which comprises a direct connection type oil casing joint.
The well string has the above-mentioned advantages over the prior art and will not be described in detail here.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (10)
1. The utility model provides a directly link type oil casing connects which characterized in that includes: a male buckle (100) and a female buckle (200);
the outer wall of the male buckle (100) is sequentially provided with a first thread (110), a first cylindrical surface (120) and a first torque shoulder (130), and the inner wall of the female buckle (200) is sequentially provided with a second thread (210), a second cylindrical surface (220) and a second torque shoulder (230);
the first thread (110) can be in threaded connection with the second thread (210), and the first cylindrical surface (120) is in clearance fit with the second cylindrical surface (220);
the first torque shoulder (130) compresses against the second torque shoulder (230) to form a sealing surface (500).
2. The direct connection type oil casing joint according to claim 1, wherein the first thread (110) comprises a thread vanishing point (310), an incomplete thread section (320) and a complete thread section (330) which are arranged in sequence, and the complete thread section (330) is positioned on one side of the incomplete thread section (320) close to the first torque shoulder (130);
the diameter at the thread vanishing point (310) is equal to the outer diameter of the pin (100).
3. A direct connection type oil casing joint according to claim 1, characterized in that the length of the first cylindrical surface (120) is not less than the length of the second cylindrical surface (220);
the length of the first cylindrical surface (120) and the length of the second cylindrical surface (220) are both between 5mm and 10 mm.
4. The direct connection type oil casing joint according to claim 1, wherein the taper of the first thread (110) and the taper of the second thread (210) are both 1: 16.
5. a direct connect type oil casing joint as claimed in any of claims 1 to 4 wherein said first torque shoulder (130) and said second torque shoulder (230) are right angle shoulders.
6. A direct connect type oil casing joint as claimed in any of claims 1 to 4 wherein said first torque shoulder (130) and said second torque shoulder (230) are both-15 ° shoulders.
7. A direct connection type oil casing joint according to any one of claims 1-4, characterized in that the outer wall of the box (200) is provided with an upset transition section (400).
8. The direct connection type oil casing joint according to claim 7, wherein the angle of the upset transition (400) is between 5 ° and 45 °.
9. A direct connection type oil casing joint according to claim 1, characterized in that the internal diameter of the male (100) is equal to the internal diameter of the female (200).
10. An oil well string comprising a straight connection type oil casing joint according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021129551.5U CN211144403U (en) | 2020-06-18 | 2020-06-18 | Direct-connection type oil casing joint and oil well pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021129551.5U CN211144403U (en) | 2020-06-18 | 2020-06-18 | Direct-connection type oil casing joint and oil well pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211144403U true CN211144403U (en) | 2020-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021129551.5U Active CN211144403U (en) | 2020-06-18 | 2020-06-18 | Direct-connection type oil casing joint and oil well pipe column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211144403U (en) |
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2020
- 2020-06-18 CN CN202021129551.5U patent/CN211144403U/en active Active
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