CN214221116U - Direct-connection type casing threaded joint - Google Patents
Direct-connection type casing threaded joint Download PDFInfo
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- CN214221116U CN214221116U CN202120169254.1U CN202120169254U CN214221116U CN 214221116 U CN214221116 U CN 214221116U CN 202120169254 U CN202120169254 U CN 202120169254U CN 214221116 U CN214221116 U CN 214221116U
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Abstract
The utility model provides a directly link type casing screwed joint, including screw-thread fit's external screwed joint and interior screwed joint, along directly linking type casing screwed joint's axial, form circular bead structure, first seal structure, first recess, helicitic texture, second recess, second seal structure, third recess and terminal surface structure by the outside inboard in proper order between external screwed joint and the interior screwed joint, wherein, circular bead structure is adjacent with first seal structure. Through the technical scheme provided by the application, the problem that the external sealing performance of a product in the prior art is poor under a harsh external pressure condition can be solved, and the problem that the threads are corroded due to the fact that external fluid enters the thread part can be effectively solved.
Description
Technical Field
The utility model relates to an oil gas well probing and exploitation technical field particularly, relate to a directly link type sleeve threaded joint.
Background
Compared with a hoop-type casing threaded joint, the direct-connection casing threaded joint is internally and externally flush, so that the probability of the pipe column being blocked when the pipe column is used in a horizontal well, an inclined well and other large dogleg oil and gas well is lower; and direct-connected casing screwed joint is a lot of less than the external diameter of coupling formula casing screwed joint to directly connect the annular space clearance that casing screwed joint can increase the pit shaft, make things convenient for the construction in the pit of later stage.
Chinese patent CN105604499 discloses an invention patent named "a direct-connection type double-shoulder threaded joint", which adopts a two-stage thread design mode, and the sealing structure and the shoulder part are both designed in the middle, and the patent technology has certain sealing performance and high connection strength. However, in the technology, because the end parts of the male and female pipes are not provided with a sealing structure, external pressure is easy to leak in a harsh external pressure environment, and internal and external fluids are easy to enter a thread part to cause corrosion of threads.
SUMMERY OF THE UTILITY MODEL
The utility model provides a directly link type casing screwed joint to solve the leakproofness among the prior art poor, perishable problem.
The utility model provides a directly link type casing screwed joint, including screw-thread fit's external screwed joint and interior screwed joint, along directly linking type casing screwed joint's axial, form circular bead structure, first seal structure, first recess, helicitic texture, second recess, second seal structure, third recess and terminal surface structure by the outside inboard in proper order between external screwed joint and the interior screwed joint, wherein, circular bead structure and the adjacent setting of first seal structure.
Further, the shoulder structure includes: the first outer inclined plane located on the outermost side of the external thread joint inclines towards the direction close to the axis of the direct-connection type sleeve threaded joint from the shoulder structure to the end surface structure, and an included angle alpha is formed between the first outer inclined plane and the axis of the direct-connection type sleeve threaded joint1(ii) a The second outer inclined plane on the external thread joint is connected with the first outer inclined plane, the second outer inclined plane inclines towards the direction far away from the axis of the direct-connection type threaded sleeve joint from the direction of the shoulder structure towards the end surface structure, and an included angle alpha is formed between the second outer inclined plane and a perpendicular line of the axis of the direct-connection type threaded sleeve joint2(ii) a The first inner inclined plane located on the outermost side of the female thread joint inclines towards the direction away from the axis of the direct-connection type sleeve thread joint from the shoulder structure to the end surface structure, and an included angle beta is formed between the first inner inclined plane and the axis of the direct-connection type sleeve thread joint1(ii) a The second inner inclined plane on the female adapter is inclined towards the direction away from the axis of the direct-connection type sleeve threaded joint from the direction of the shoulder structure towards the end surface structure, the second inner inclined plane is connected with the first inner inclined plane, and an included angle beta is formed between the second inner inclined plane and a perpendicular line of the axis of the direct-connection type sleeve threaded joint2And the second outer inclined surface is in fit contact with the second inner inclined surface.
Further, the included angle α1At an angle of 8-12 DEG, beta1At an angle of 8-12 DEG20-15 degree included angle beta2＝0°～15°。
Further, the first sealing structure includes: a first outer sealing conical surface on the external thread joint; first circular arc R on external thread joint1(ii) a Second circular arc R on external thread joint2From shoulder structure to end structure, first circleArc R1A first outer sealing conical surface and a second circular arc R2Are connected in sequence; seventh arc R on female adapter7(ii) a Eighth arc R on female adapter8(ii) a The first inner sealing conical surface on the female adapter is a seventh circular arc R from the shoulder structure to the end surface structure7The first inner sealing conical surface and the eighth circular arc R8The first outer sealing conical surface and the first inner sealing conical surface are sequentially connected, and are gradually close to the axis of the direct-connection type sleeve threaded connector, and the first outer sealing conical surface and the first inner sealing conical surface are in contact with each other.
Further, the first arc R10.6-1 mm, second arc R24-6 mm, seventh arc R70.8-1.2 mm, eighth arc R82 ~ 4mm, the tapering of first outer sealing conical surface and first inner seal conical surface is 1: 2-1: and 6, the taper of the first outer sealing conical surface is greater than that of the first inner sealing conical surface.
Further, the female adapter comprises an outer shoulder surface, an outer sealing surface, a thread section, an inner sealing surface and an inner shoulder surface which are sequentially arranged from the outer side to the inner side, the first groove comprises a groove structure, and the groove structure is located between the outer sealing surface and the thread section of the female adapter.
Further, the first groove includes: the third outer inclined plane on the external thread joint inclines towards the direction of the end surface structure from the circular bead structure, the third outer inclined plane inclines towards the direction close to the axis of the direct-connection type sleeve threaded joint, and an included angle alpha is formed between the third outer inclined plane and the axis of the direct-connection type sleeve threaded joint3(ii) a The first outer cylindrical surface and one end, far away from the shoulder structure, of the third outer inclined surface are connected; the third inner inclined plane on the female thread joint inclines towards the direction of the end surface structure from the circular bead structure, the third inner inclined plane inclines towards the direction far away from the axis of the direct-connection type sleeve thread joint, and an included angle beta is formed between the third inner inclined plane and the axis of the direct-connection type sleeve thread joint3(ii) a The first inner cylindrical surface is connected with one end, far away from the shoulder structure, of the third inner inclined surface; a fourth inner inclined plane on the female adapter in the direction from the shoulder structure to the end surface structureThe fourth inner inclined plane inclines towards the direction close to the axis of the direct-connection type sleeve threaded joint, and an included angle beta is formed between the fourth inner inclined plane and the axis of the direct-connection type sleeve threaded joint4(ii) a The third outer inclined plane, the first outer cylindrical surface, the third inner inclined plane, the first inner cylindrical surface and the fourth inner inclined plane jointly form a first groove.
Further, the included angle α320-40 DEG, angle beta310-20 DEG, angle beta4＝20°～40°。
Further, the second groove includes: a fourth outer inclined plane on the external thread joint inclines from the shoulder structure to the end surface structure direction to the direction close to the axis of the direct-connection type sleeve threaded joint, and an included angle alpha is formed between the fourth outer inclined plane and the axis of the direct-connection type sleeve threaded joint4(ii) a The second outer cylindrical surface on the external thread joint is connected with one end, far away from the shoulder structure, of the fourth outer inclined surface; a fifth inner inclined plane on the female adapter inclines towards the direction of the end surface structure from the circular bead structure and towards the direction far away from the axis of the direct-connection type sleeve threaded adapter, and an included angle beta is formed between the fifth inner inclined plane and the axis of the direct-connection type sleeve threaded adapter5(ii) a A second inner cylindrical surface on the female adapter is connected with one end of the fifth inner inclined plane far away from the shoulder structure; the sixth inner inclined plane on the female adapter is connected with one end, far away from the circular bead structure, of the second inner cylindrical surface, the direction from the circular bead structure to the end surface structure is inclined towards the direction close to the axis of the direct-connection type threaded sleeve adapter, and an included angle beta is formed between the sixth inner inclined plane and the axis of the direct-connection type threaded sleeve adapter6And the fourth outer inclined plane, the second outer cylindrical surface, the fifth inner inclined plane, the second inner cylindrical surface and the sixth inner inclined plane form a second groove together.
Further, the included angle α420-40 DEG, angle beta510-20 DEG, angle beta6＝30°～50°。
Further, the second sealing structure includes: a second outer sealing conical surface on the male connector; third arc R on the male adapter3(ii) a Fourth arc R on the male adapter4From the shoulder structure in the direction of the end face structure, the third arc R3The second outer sealing conical surface and the fourth circular arc R4 are connected in sequence; ninth arc R on female adapter9(ii) a The tenth arc R on the female adapter10(ii) a The second inner sealing conical surface on the female adapter is a ninth arc R from the shoulder structure to the end surface structure9A second inner sealing conical surface and a tenth circular arc R10And the second outer sealing conical surface and the second inner sealing conical surface are gradually close to the axis of the direct-connection type sleeve threaded joint and are in mutual contact.
Further, a third arc R310-30 mm, fourth arc R44-8 mm, ninth arc R94-6 mm, the tenth arc R 104 ~ 6mm, the tapering of the sealed conical surface in second outer sealed conical surface and the second is 1: 3-1: and 8, the taper of the second outer sealing conical surface is smaller than that of the second inner sealing conical surface.
Further, the third groove includes: the fifth outer inclined plane on the external thread joint is inclined towards the direction of the end surface structure from the shoulder structure and towards the direction close to the axis of the direct connection type sleeve thread joint; the sixth outer inclined plane on the external thread joint inclines towards the direction close to the axis of the direct-connection type sleeve thread joint from the shoulder structure to the end surface structure; fifth circular arc R on the male adapter5(ii) a Sixth arc R on male adapter6From the shoulder structure to the end face structure, a fifth outer inclined plane and a fifth circular arc R5A sixth outer inclined plane, a sixth arc R6Are connected in sequence; a third inner cylindrical surface on the female adapter; eleventh arc R on female adapter11The third inner cylindrical surface passes through the eleventh arc R11Connected with the end face structure, a fifth outer inclined plane, a sixth outer inclined plane and a fifth circular arc R5The sixth arc R6A third inner cylindrical surface and an eleventh arc R11Together forming a third recess.
Further, a fifth circular arc R52-6 mm, sixth arc R60.8-1.2 mm, fifth outer slopeAngle of conical surface alpha515-25 °, the taper of the sixth outer inclined plane is 1: 12-1: 18, eleventh arc R11＝0.6～1mm。
Further, the end face structure includes: the outer shoulder surface on the external thread joint is vertical to the axis of the direct-connection type sleeve thread joint; the inner shoulder surface on the female adapter is perpendicular to the axis of the direct-connection type sleeve threaded joint, and the outer shoulder surface and the inner shoulder surface are arranged correspondingly.
Furthermore, the external thread joint is also provided with a seventh outer inclined surface, the seventh outer inclined surface is positioned on the inner side of the external thread joint and connected with one end of the outer shoulder surface, which is far away from the shoulder structure, the shoulder structure inclines towards the end surface structure, the seventh outer inclined surface inclines towards the direction far away from the axis of the direct-connection type sleeve threaded joint, and an included angle alpha is formed between the seventh outer inclined surface and the axis of the direct-connection type sleeve threaded joint6(ii) a The female thread joint further comprises a seventh inner inclined plane, the seventh inner inclined plane is located on the inner side of the female thread joint and connected with one end, away from the shoulder structure, of the inner shoulder surface, the seventh inner inclined plane inclines towards the direction close to the axis of the direct-connection type sleeve thread joint from the shoulder structure to the end surface structure, and an included angle beta is formed between the seventh inner inclined plane and the axis of the direct-connection type sleeve thread joint7。
Further, the included angle α6At an angle of 5-10 DEG, beta7＝8°～12°。
Use the technical scheme of the utility model, this directly link type casing screwed joint includes external thread joint and female connection, wherein has set gradually circular bead structure, first seal structure, first recess, helicitic texture, second recess, second seal structure, third recess and end face structure between external thread joint and the female connection to with circular bead structure and the adjacent setting of first seal structure. So set up, can seal at screwed joint's inside and outside both ends respectively through first seal structure and second seal structure, improved screwed joint's sealing performance to, with circular bead structure and first seal structure lug connection, can prevent like this that external pressure from getting into to connect inside to cause to connect to warp and then lead to the condition appearance of sealed inefficacy, further improved screwed joint's anti external pressure sealing performance.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of a direct connection type threaded joint for a casing according to the present invention;
FIG. 2 is a schematic view showing the construction of a male connector of the direct connection type threaded joint for casing of FIG. 1;
FIG. 3 shows an enlarged view at A in FIG. 2;
FIG. 4 shows an enlarged view at B in FIG. 2;
FIG. 5 is a schematic view showing the construction of a female connection of the direct connection type box threaded joint of FIG. 1;
FIG. 6 shows an enlarged view at C in FIG. 5; and
fig. 7 shows an enlarged view at D in fig. 5.
Wherein the figures include the following reference numerals:
1. an externally threaded nipple; 2. a first outer bevel; 3. a second outer bevel; 4. a first outer sealing conical surface; 5. a third outer slope; 6. a first outer cylindrical surface; 7. a fourth outer slope; 8. a second outer cylindrical surface; 9. a second outer sealing cone; 10. a fifth outer slope; 11. a sixth outer slope; 12. an outer shoulder surface; 13. a seventh outer slope;
14. an internal thread joint; 15. a first inner inclined plane; 16. a second inner slope; 17. a first inner sealing cone; 18. a third inner slope; 19. a first inner cylindrical surface; 20. a fourth inner ramp; 21. a fifth inner slope; 22. a second inner cylindrical surface; 23. a sixth inner slope; 24. a second inner sealing cone; 25. a third inner cylindrical surface; 26. an inner shoulder surface; 27. a seventh inner ramp;
100. a shoulder structure; 200. a first seal structure; 300. a first groove; 400. a thread structure; 500. a second groove; 600. a second seal structure; 700. a third groove; 800. and (4) end face structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the embodiment of the utility model provides a directly link type casing screwed joint, this directly link type casing screwed joint includes screw-thread fit's external screwed joint 1 and female adapter 14, along directly linking type casing screwed joint's axial, form shoulder structure 100 by outside to inboard in proper order between external screwed joint 1 and the female adapter 14, first seal structure 200, first recess 300, helicitic texture 400, second recess 500, second seal structure 600, third recess 700 and end face structure 800, wherein, shoulder structure 100 sets up with first seal structure 200 is adjacent, there is only the chamfer promptly between shoulder structure 100 and the first seal structure 200, directly transition to first seal structure 200 by shoulder structure 100, there is not other structures between the two. By such an arrangement, the structural strength between the shoulder structure 100 and the first seal structure 200 can be improved, and the problem of seal failure caused by extrusion deformation can be reduced or avoided.
Through the technical scheme that this directly link type casing screwed joint includes external thread joint 1 and female thread joint 14, wherein has set gradually circular bead structure 100, first seal structure 200, first recess 300, helicitic texture 400, second recess 500, second seal structure 600, third recess 700 and end face structure 800 between external thread joint 1 and the female thread joint 14 to with circular bead structure 100 and the adjacent setting of first seal structure 200. So set up, can seal at screwed joint's inside and outside both ends respectively through first seal structure 200 and second seal structure 600, improved screwed joint's sealing performance to, with circular bead structure 100 and first seal structure 200 lug connection, can prevent like this that external pressure from getting into to connect inside to cause to connect to warp and then lead to the condition appearance of sealed inefficacy, further improved screwed joint's anti external pressure sealing performance.
As shown in fig. 2, 3, 5, and 6, the shoulder structure 100 includes: the first and second outer bevels 2 and 3 located outermost in the pin 1, and the first and second inner bevels 15 and 16 located outermost in the box 14. Wherein, the first outer inclined plane 2 is inclined from the shoulder structure 100 to the end surface structure 800, the first outer inclined plane 2 is inclined to the direction close to the axis of the direct-connection type threaded sleeve joint, and an included angle alpha is formed between the first outer inclined plane 2 and the axis of the direct-connection type threaded sleeve joint1. The second outer inclined plane 3 is connected with the first outer inclined plane 2, the direction from the circular bead structure 100 to the end surface structure 800, the direction from the second outer inclined plane 3 to the axis far away from the direct-connection type threaded joint for the casing pipe is inclined, and an included angle alpha is formed between the second outer inclined plane 3 and a perpendicular line of the axis of the direct-connection type threaded joint for the casing pipe2. The first inner inclined plane 15 is inclined from the shoulder structure 100 to the end surface structure 800, the first inner inclined plane 15 is inclined to the direction far away from the axis of the direct-connection type threaded sleeve joint, and an included angle beta is formed between the first inner inclined plane 15 and the axis of the direct-connection type threaded sleeve joint1. The second inner inclined plane 16 is inclined from the shoulder structure 100 to the end surface structure 800, the second inner inclined plane 16 is inclined towards the direction far away from the axis of the direct-connection type threaded sleeve joint, the second inner inclined plane 16 is connected with the first inner inclined plane 15, and an included angle beta is formed between the second inner inclined plane 16 and the perpendicular line of the axis of the direct-connection type threaded sleeve joint2And the second outer inclined surface 3 is in matching contact with the second inner inclined surface 16. Wherein, the distance from the second groove 500 corresponding to the male adapter 1 to the end face structure 800 is L1The distance from the second sealing structure 600 corresponding to the male adapter 1 to the end face structure 800 is L2The thickness T of the male threaded joint 1 in the radial direction at the second seal structure 6001。
Specifically, the included angle α1At an angle of 8-12 DEG, beta1At an angle of 8-12 DEG20-15 degree included angleβ2＝0°～15°。
Specifically, the first sealing structure 200 includes: the first outer sealing conical surface 4 and the first circular arc R on the external thread joint 11And a second circular arc R2And a seventh circular arc R on the female threaded joint 147The eighth arc R8And a first inner sealing cone 17. The first arc R is from the shoulder structure 100 to the end structure 8001A first outer sealing conical surface 4 and a second circular arc R2Are connected in sequence. A seventh arc R from the shoulder structure 100 to the end surface structure 8007A first inner sealing conical surface 17 and an eighth circular arc R8And the first outer sealing conical surface 4 and the first inner sealing conical surface 17 are sequentially connected, and are gradually close to the axis of the direct connection type sleeve threaded joint, and the first outer sealing conical surface 4 and the first inner sealing conical surface 17 are in mutual contact.
Wherein, the first arc R10.6-1 mm, second arc R24-6 mm, seventh arc R70.8-1.2 mm, eighth arc R82 ~ 4mm, the tapering of first outer sealing conical surface 4 and first interior sealing conical surface 17 is 1: 2-1: and 6, the taper of the first outer sealing conical surface 4 is greater than that of the first inner sealing conical surface 17 so as to compensate the deformation of two sides of the sealing surface and avoid the inconsistency of the deformation of the two sides.
Specifically, the female adapter 14 includes an outer shoulder surface, an outer sealing surface, a thread section, an inner sealing surface, and an inner shoulder surface, which are sequentially arranged from the outside to the inside, and the first groove 300 includes a groove structure, which is located between the outer sealing surface and the thread section of the female adapter 14. By arranging the groove structure, the cutter can be conveniently withdrawn when the outer sealing surface and the thread section are processed; and, through this groove structure can reach the effect of release stress when storing excessive screw thread fat.
In this embodiment, the first groove 300 includes: a third outer bevelled surface 5, a first outer cylindrical surface 6 on the pin 1, and a third inner bevelled surface 18, a first inner cylindrical surface 19 and a fourth inner bevelled surface 20 on the box 14. Wherein the third outer inclined surface 5 is from the shoulder structure 100 to the end surface structure 800, and the third outer inclined surface 5 is close to the axis of the direct connection type threaded joint for the sleeveIs inclined, and an included angle alpha is formed between the third outer inclined surface 5 and the axis of the direct connection type sleeve threaded joint3. The first outer cylindrical surface 6 is connected to the end of the third outer inclined surface 5 remote from the shoulder formation 100. The third inner inclined surface 18 on the female adapter 14 is inclined from the shoulder structure 100 to the end surface structure 800, the third inner inclined surface 18 is inclined to the direction far away from the axis of the direct-connection type threaded sleeve adapter, and an included angle beta is formed between the third inner inclined surface 18 and the axis of the direct-connection type threaded sleeve adapter3. The first internal cylindrical surface 19 is connected to the end of the third internal ramp 18 remote from the shoulder formation 100. The fourth inner inclined plane 20 is inclined from the shoulder structure 100 to the end surface structure 800, the fourth inner inclined plane 20 is inclined to the direction close to the axis of the direct-connection type threaded sleeve joint, and an included angle beta is formed between the fourth inner inclined plane 20 and the axis of the direct-connection type threaded sleeve joint4. The first groove 300 is jointly formed by the third outer bevel 5, the first outer cylindrical surface 6, the third inner bevel 18, the first inner cylindrical surface 19 and the fourth inner bevel 20.
Specifically, the included angle α320-40 DEG, angle beta310-20 DEG, angle beta4＝20°～40°。
As shown in fig. 2, 4, 5, and 7, the second groove 500 includes: a fourth external chamfer 7 and a second external cylindrical surface 8 on the pin 1, and a fifth internal chamfer 21, a second internal cylindrical surface 22 and a sixth internal chamfer 23 on the box 14. Wherein, the fourth outer inclined plane 7 on the external thread joint 1 is inclined from the shoulder structure 100 to the end surface structure 800, the fourth outer inclined plane 7 is inclined to the direction close to the axis of the direct-connection type casing thread joint, and an included angle alpha is formed between the fourth outer inclined plane 7 and the axis of the direct-connection type casing thread joint4. Second outer cylindrical surface 8 is connected to an end of fourth outer ramp 7 remote from shoulder formation 100. The fifth inner inclined surface 21 on the female adapter 14 is inclined from the shoulder structure 100 to the end surface structure 800, the fifth inner inclined surface 21 is inclined to the direction far away from the axis of the direct-connection type threaded sleeve adapter, and an included angle beta is formed between the fifth inner inclined surface 21 and the axis of the direct-connection type threaded sleeve adapter5. The second inner cylindrical surface 22 is connected to the end of the fifth inner inclined surface 21 remote from the shoulder formation 100. The sixth inner inclined surface 23 and the second inner cylindrical surface 22 are far away from the shoulder structure100, the direction from the shoulder structure 100 to the end surface structure 800, the sixth inner inclined surface 23 inclined to the direction close to the axis of the direct connection type threaded sleeve joint, and an included angle beta formed between the sixth inner inclined surface 23 and the axis of the direct connection type threaded sleeve joint6The fourth outer bevel 7, the second outer cylindrical surface 8, the fifth inner bevel 21, the second inner cylindrical surface 22 and the sixth inner bevel 23 together form a second groove 500.
Specifically, the included angle α420-40 DEG, angle beta510-20 DEG, angle beta6＝30°～50°。
Wherein the second sealing structure 600 includes: the second external sealing conical surface 9 and the third circular arc R on the external thread joint 13And a fourth arc R4And a ninth circular arc R on the female adapter 149The tenth arc R10And a second inner sealing cone 24. Third arc R from shoulder structure 100 toward end structure 8003The second outer sealing conical surface 9 and the fourth circular arc R4 are connected in sequence. Ninth arc R from shoulder structure 100 toward end structure 8009A second inner sealing cone surface 24 and a tenth arc R10And the second outer sealing conical surface 9 and the second inner sealing conical surface 24 are gradually close to the axis of the straight-connection type sleeve threaded joint, and the second outer sealing conical surface 9 and the second inner sealing conical surface 24 are contacted with each other.
In particular, the third arc R310-30 mm, fourth arc R44-8 mm, ninth arc R94-6 mm, the tenth arc R10The conicity of the second outer sealing conical surface 9 and the conicity of the second inner sealing conical surface 24 are both 1: 3-1: and 8, the taper of the second outer sealing conical surface 9 is smaller than that of the second inner sealing conical surface 24 so as to compensate the deformation of two sides of the sealing surface and avoid the inconsistency of the deformation of the two sides.
Wherein the third groove 700 includes: a fifth outer inclined plane 10, a sixth outer inclined plane 11 and a fifth circular arc R on the male thread joint 15And a sixth arc R6And a third inner cylindrical surface 25 and an eleventh arc R on the female adapter 1411. Specifically, the fifth external bevel 10 of the male adapter 1 is formed from the shoulder structure 100 to the end surface structure800, the fifth outer slope 10 is inclined towards the axis of the direct connection type threaded joint for sleeves. The sixth outer inclined surface 11 is inclined from the shoulder structure 100 toward the end surface structure 800, and the sixth outer inclined surface 11 is inclined toward a direction close to the axis of the direct connection type threaded joint for a casing. A fifth outer inclined plane 10 and a fifth circular arc R from the shoulder structure 100 to the end surface structure 8005A sixth outer inclined plane 11, a sixth arc R6Are connected in sequence. The third inner cylindrical surface 25 passes through the eleventh arc R11A fifth outer inclined plane 10, a sixth outer inclined plane 11, a fifth arc R connected with the end face structure 8005The sixth arc R6A third inner cylindrical surface 25 and an eleventh arc R11Together forming a third recess 700.
Specifically, the fifth arc R52-6 mm, sixth arc R60.8-1.2 mm, the taper angle α of the fifth outer slope 10515-25 °, the taper of the sixth outer inclined surface 11 is 1: 12-1: 18, eleventh arc R11＝0.6～1mm。
The end face structure 800 includes: the outer shoulder surface 12 on the external thread joint 1 and the inner shoulder surface 26 on the internal thread joint 14, the outer shoulder surface 12 is perpendicular to the axis of the direct-connection type threaded sleeve joint, the inner shoulder surface 26 is perpendicular to the axis of the direct-connection type threaded sleeve joint, and the outer shoulder surface 12 and the inner shoulder surface 26 are arranged correspondingly.
Specifically, the external thread joint 1 further has a seventh external inclined surface 13, the seventh external inclined surface 13 is located on the inner side of the external thread joint 1 and connected to one end of the external shoulder surface 12 away from the shoulder structure 100, the seventh external inclined surface 13 is inclined in a direction away from the axis of the direct-connection type threaded sleeve joint from the shoulder structure 100 to the end surface structure 800, and an included angle α is formed between the seventh external inclined surface 13 and the axis of the direct-connection type threaded sleeve joint6. The female thread joint 14 further comprises a seventh inner inclined surface 27, the seventh inner inclined surface 27 is located on the inner side of the female thread joint 14 and connected with one end of the inner shoulder surface 26 away from the shoulder structure 100, the shoulder structure 100 faces the end surface structure 800, the seventh inner inclined surface 27 inclines towards the direction close to the axis of the direct-connection type threaded sleeve joint, and an included angle beta is formed between the seventh inner inclined surface 27 and the axis of the direct-connection type threaded sleeve joint7。
Wherein the included angle alpha6At an angle of 5-10 DEG, beta7＝8°～12°。
One specific example is listed below:
the direct connection type threaded joint for casing pipes of the embodiment of the application adopts
206.38mm x 17.25mm gauge casing, steel grade V140. The geometric parameters of the external thread joint 1 are as follows: alpha is alpha1＝10°，α2＝10°，R1The taper of the first outer sealing conical surface 4 is 1:3, R is 0.8mm2＝4mm，α3＝30°，α4＝30°，R330mm, the taper of the second outer sealing cone 9 is 1:5.25, R4＝6mm，α5＝20°，R5The taper of the sixth outer inclined plane 11 is 1:16, and the circular arc R is 4mm6＝1.0mm，α66 deg. is equal to. The geometry of the female adapter 14 is: beta is a1＝α1＝10°，β2＝10°，R71.0mm, the taper of the first inner sealing cone 17 is 1:3.15, R8＝4mm，β3＝15°，β4＝25°，β5＝15°，β6＝45°，R9＝4mm，R106mm, the taper of the second inner sealing cone 24 is 1:5, R11＝0.8mm，β7＝10°。L2/L1＝70％，T1/L140%. The direct-connection type sleeve threaded joint designed according to the parameters has the advantages that the connection strength reaches 5150kN, the compression strength reaches 5940kN, the internal pressure sealing performance reaches more than 141Mpa, the external pressure resistance reaches more than 146Mpa, the bending resistance reaches more than 20 degrees/30 meters, and the requirement of no thread gluing during the 3-time shackle opening is met.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (17)
1. The utility model provides a directly link type casing screwed joint, its characterized in that, including screw-thread fit's external thread joint (1) and female connection (14), follow directly link type casing screwed joint's axial, external thread joint (1) with inwards form shoulder structure (100), first seal structure (200), first recess (300), helicitic texture (400), second recess (500), second seal structure (600), third recess (700) and end face structure (800) in proper order by the outside between female connection (14), wherein, shoulder structure (100) with first seal structure (200) adjacent setting.
2. A direct connection type threaded sleeve joint according to claim 1, characterized in that said shoulder structure (100) comprises:
be located first outer inclined plane (2) of external screwed joint (1) outside, by shoulder structure (100) to the direction of end surface structure (800), first outer inclined plane (2) to being close to the direction slope of directly connecting type sleeve screwed joint's axis, first outer inclined plane (2) with form contained angle alpha between directly connecting type sleeve screwed joint's the axis1；
Second outer inclined plane (3) on external thread joint (1), second outer inclined plane (3) with first outer inclined plane (2) are connected, by circular bead structure (100) to the direction of end structure (800), second outer inclined plane (3) are to keeping away from the direction slope of directly connecting type casing screwed joint's axis, second outer inclined plane (3) with form contained angle alpha between the perpendicular of directly connecting type casing screwed joint's axis2；
Be located first interior inclined plane (15) of female connection (14) outside, by shoulder structure (100) to the direction of end surface structure (800), first interior inclined plane (15) to keeping away from the direction slope of direct connection type casing screwed joint's axis, first interior inclined plane (15) with form contained angle beta between the axis of direct connection type casing screwed joint1；
Second internal inclined plane (16) on female adapter (14), by shoulder structure (100) to the direction of end surface structure (800), second internal inclined plane (16) to keeping away from the direction slope of the axis of direct connection type casing screwed joint, second internal inclined plane (16) with first internal inclined plane (15) are connected, second internal inclined plane (16) with form contained angle beta between the perpendicular line of the axis of direct connection type casing screwed joint2The second outer inclined surface (3) is in fit contact with the second inner inclined surface (16).
3. A direct connection type threaded sleeve joint as claimed in claim 2, characterized in that said included angle α is1At an angle of 8-12 DEG, said angle beta1At an angle of 8-12 DEG, the angle alpha20-15 DEG, the angle beta2＝0°～15°。
4. A threaded joint for straight-through sleeves according to claim 1, characterized in that said first sealing structure (200) comprises:
a first outer sealing conical surface (4) on the external thread joint (1);
a first circular arc R on the male adapter (1)1；
A second circular arc R on the male thread joint (1)2Said first arc R, in the direction from said shoulder formation (100) to said end face formation (800)1The first outer sealing conical surface (4) and the second circular arc R2Are connected in sequence;
a seventh circular arc R on the female adapter (14)7；
An eighth circular arc R on the female adapter (14)8；
The first inner sealing conical surface (17) on the female adapter (14) extends from the shoulder structure (100) to the end surface structure (800), and the seventh arc R7The first inner sealing conical surface (17) and the eighth circular arc R8Connect in order, just first external sealing conical surface (4) with first internal seal conical surface (17) all is close to gradually directly link type sleeve thread joint's axis, first external sealing conical surface (4) with first internal seal conical surface (17) contact each other.
5. A direct connection type threaded sleeve joint as claimed in claim 4, characterized in that said first circular arc R10.6-1 mm, the second arc R24-6 mm, the seventh circular arc R70.8-1.2 mm, the eighth arc R82 ~ 4mm, the tapering of first outer sealing conical surface (4) and first interior sealing conical surface (17) is 1: 2-1: and 6, the taper of the first outer sealing conical surface (4) is greater than that of the first inner sealing conical surface (17).
6. A direct connection type threaded sleeve connection according to claim 1, characterized in that the female connection (14) comprises, in succession from the outside to the inside, an outer shoulder surface, an outer sealing surface, a threaded segment, an inner sealing surface and an inner shoulder surface, the first groove (300) comprising a groove structure located between the outer sealing surface of the female connection (14) and the threaded segment.
7. A threaded joint for directly connected casings according to claim 1, characterized in that said first groove (300) comprises:
third outer inclined plane (5) on external screwed joint (1), by shoulder structure (100) to the direction of end surface structure (800), third outer inclined plane (5) to being close to the direction slope of direct connection type casing screwed joint's axis, third outer inclined plane (5) with form contained angle alpha between the axis of direct connection type casing screwed joint3；
A first outer cylindrical surface (6) on the male connection (1), the first outer cylindrical surface (6) being connected to an end of the third outer inclined surface (5) remote from the shoulder structure (100);
third internal inclined plane (18) on female adapter (14), by shoulder structure (100) to the direction of end surface structure (800), third internal inclined plane (18) to keeping away from the direction slope of direct connection type casing screwed joint's axis, third internal inclined plane (18) with form contained angle beta between the axis of direct connection type casing screwed joint3；
A first inner cylindrical surface (19) on the female connection (14), the first inner cylindrical surface (19) being connected to an end of the third inner ramp (18) remote from the shoulder formation (100);
fourth internal inclined plane (20) on female adapter (14), by shoulder structure (100) to the direction of end face structure (800), fourth internal inclined plane (20) to being close to the direction slope of direct connection type casing screwed joint's axis, fourth internal inclined plane (20) with form contained angle beta between the axis of direct connection type casing screwed joint4；
The third outer inclined surface (5), the first outer cylindrical surface (6), the third inner inclined surface (18), the first inner cylindrical surface (19) and the fourth inner inclined surface (20) together form the first groove (300).
8. A direct connection type threaded sleeve joint as claimed in claim 7, characterized in that said included angle α is320-40 DEG, said angle beta310-20 DEG, said angle beta4＝20°～40°。
9. A threaded joint for directly connected casings according to claim 1, characterized in that said second groove (500) comprises:
fourth outer inclined plane (7) on external screwed joint (1), by shoulder structure (100) to the direction of end surface structure (800), fourth outer inclined plane (7) to being close to the direction slope of direct connection type casing screwed joint's axis, fourth outer inclined plane (7) with form contained angle alpha between the axis of direct connection type casing screwed joint4；
The second outer cylindrical surface (8) on the male adapter (1), the second outer cylindrical surface (8) is connected with one end, away from the shoulder structure (100), of the fourth outer inclined surface (7);
fifth inner inclined plane (21) on female adapter (14), by shoulder structure (100) to the direction of end surface structure (800), fifth inner inclined plane (21) to keeping away from the direction slope of direct connection type casing screwed joint's axis, fifth inner inclined plane (21) with form contained angle beta between the axis of direct connection type casing screwed joint5；
A second inner cylindrical surface (22) on the female adapter (14), the second inner cylindrical surface (22) being connected to an end of the fifth inner ramp (21) remote from the shoulder structure (100);
a sixth inner inclined surface (23) on the female threaded joint (14), the sixth inner inclined surface (23) is connected with one end, away from the shoulder structure (100), of the second inner cylindrical surface (22), the sixth inner inclined surface (23) inclines towards the direction close to the axis of the direct-connection type threaded sleeve joint from the shoulder structure (100) to the end surface structure (800), and an included angle beta is formed between the sixth inner inclined surface (23) and the axis of the direct-connection type threaded sleeve joint6The fourth outer inclined surface (7), the second outer cylindrical surface (8), the fifth inner inclined surface (21), and the second inner inclined surfaceThe cylindrical surface (22) and the sixth inner slope (23) together form the second groove (500).
10. A direct connection type threaded sleeve joint as claimed in claim 9 wherein said included angle α is420-40 DEG, said angle beta510-20 DEG, said angle beta6＝30°～50°。
11. A direct connection type threaded sleeve joint according to claim 1, characterized in that said second sealing structure (600) comprises:
a second outer sealing cone (9) on the male connector (1);
a third circular arc R on the male thread joint (1)3；
A fourth circular arc R on the male thread joint (1)4Said third arc R, in the direction from said shoulder formation (100) to said end face formation (800)3The second outer sealing conical surface (9) and the fourth circular arc R4 are connected in sequence;
a ninth arc R on the female adapter (14)9；
A tenth arc R on the female adapter (14)10；
A second inner sealing cone surface (24) on the female adapter (14) from the shoulder formation (100) in the direction of the end face formation (800), the ninth arc R9The second inner sealing conical surface (24) and the tenth arc R10And the second outer sealing conical surface (9) and the second inner sealing conical surface (24) are gradually close to the axis of the direct-connection type sleeve threaded joint and are sequentially connected, and the second outer sealing conical surface (9) and the second inner sealing conical surface (24) are in mutual contact.
12. A direct connection type threaded sleeve joint as claimed in claim 11, characterized in that said third circular arc R310-30 mm, the fourth arc R44-8 mm, the ninth arc R94-6 mm, the tenth circular arc R104-6 mm, the second outer sealThe conicity of the conical surface (9) and the conicity of the second inner sealing conical surface (24) are both 1: 3-1: 8, and the conicity of the second outer sealing conical surface (9) is smaller than that of the second inner sealing conical surface (24).
13. A threaded joint for directly connected casings according to claim 1, characterized in that said third groove (700) comprises:
a fifth outer inclined surface (10) on the external thread joint (1) is inclined from the shoulder structure (100) to the direction of the end surface structure (800) to the direction close to the axis of the direct connection type casing thread joint;
a sixth outer inclined surface (11) on the external thread joint (1) is inclined from the shoulder structure (100) to the direction of the end surface structure (800) to the direction close to the axis of the direct connection type casing thread joint;
a fifth circular arc R on the male thread joint (1)5；
A sixth circular arc R on the male thread joint (1)6The fifth outer inclined plane (10) and the fifth circular arc R are arranged from the shoulder structure (100) to the end surface structure (800)5The sixth outer inclined plane (11) and the sixth arc R6Are connected in sequence;
a third internal cylindrical surface (25) on said female connector (14);
an eleventh arc R on the female adapter (14)11Said third inner cylindrical surface (25) passing through said eleventh arc of circumference R11Is connected with the end face structure (800), the fifth outer inclined plane (10), the sixth outer inclined plane (11) and the fifth circular arc R5The sixth arc R6Said third inner cylindrical surface (25) and said eleventh arc R11Together forming said third recess (700).
14. A direct connection type threaded sleeve joint as claimed in claim 13, characterized in that said fifth circular arc R52-6 mm, the sixth circular arc R60.8-1.2 mm, the angle of the fifth outer bevel (10)Degree alpha515-25 °, the taper of the sixth outer slope (11) is 1: 12-1: 18, the eleventh arc R11＝0.6～1mm。
15. A threaded joint for straight-on sleeves according to claim 1, characterized in that said end surface structure (800) comprises:
an external shoulder surface (12) on the male connection end (1), the external shoulder surface (12) being perpendicular to the axis of the direct connection type casing threaded connection;
the internal shoulder surface (26) on the female threaded joint (14) is perpendicular to the axis of the direct-connection type casing threaded joint, and the external shoulder surface (12) and the internal shoulder surface (26) are correspondingly arranged.
16. A direct connection type threaded sleeve joint as claimed in claim 15,
external thread joint (1) still has seventh outer inclined plane (13), seventh outer inclined plane (13) are located the inboard of external thread joint (1), and with outer shoulder surface (12) are kept away from the one end of shoulder structure (100) is connected, by shoulder structure (100) to the direction of end face structure (800), seventh outer inclined plane (13) are to keeping away from the direction slope of direct connection type casing screwed joint's axis, seventh outer inclined plane (13) with form contained angle alpha between the axis of direct connection type casing screwed joint6；
Interior screwed joint (14) still includes seventh internal inclined plane (27), seventh internal inclined plane (27) are located the inboard of interior screwed joint (14), and with interior shoulder surface (26) are kept away from the one end of shoulder structure (100) is connected, by shoulder structure (100) to the direction of end face structure (800), seventh internal inclined plane (27) are to being close to the direction slope of direct connection type casing screwed joint's axis, seventh internal inclined plane (27) with form contained angle beta between the axis of direct connection type casing screwed joint7。
17. A direct connection type threaded sleeve joint as claimed in claim 16 wherein said clipAngle alpha6At 5-10 deg. and said included angle beta7＝8°～12°。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120169254.1U CN214221116U (en) | 2021-01-21 | 2021-01-21 | Direct-connection type casing threaded joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120169254.1U CN214221116U (en) | 2021-01-21 | 2021-01-21 | Direct-connection type casing threaded joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214221116U true CN214221116U (en) | 2021-09-17 |
Family
ID=77690517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120169254.1U Active CN214221116U (en) | 2021-01-21 | 2021-01-21 | Direct-connection type casing threaded joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214221116U (en) |
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2021
- 2021-01-21 CN CN202120169254.1U patent/CN214221116U/en active Active
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