CN204186304U - The tool joint of a kind of antifatigue ultrahigh anti-torsion - Google Patents
The tool joint of a kind of antifatigue ultrahigh anti-torsion Download PDFInfo
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- CN204186304U CN204186304U CN201420560392.2U CN201420560392U CN204186304U CN 204186304 U CN204186304 U CN 204186304U CN 201420560392 U CN201420560392 U CN 201420560392U CN 204186304 U CN204186304 U CN 204186304U
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Abstract
The male connection that the utility model discloses in the tool joint of a kind of antifatigue ultrahigh anti-torsion has outer shoulder and inner face; There is between shoulder and inner face base section, external thread section and front section outside that be connected successively; And female adapter has outer face and interior shoulder; There is the rearward end section, internal thread segment and the bore hole section that are connected successively between interior shoulder and outer face; There is between inner face and interior shoulder the gap of 0-0.5mm; The externally threaded pitch of external thread section is: be less than per inch 4 tooth, is more than or equal to per inch 3 tooth; When externally threaded central diameter≤5 inch, Bottom of Thread radius is 0.050-0.060 inch, and tooth depth is 0.120-0.130 inch, as pitch diameter of external thread > 5 inches, Bottom of Thread radius is 0.045-0.050 inch, and tooth depth is 0.140-0.150 inch; The internal thread of internal thread segment has the pitch identical with external screw thread, Bottom of Thread radius and tooth depth.
Description
Technical field
The utility model relates to a kind of joint, particularly relates to a kind of tool joint.
Background technology
The drilling rod being generally used for oil drilling manufactures according to API standard production, and its structure is each butt welding tool joint pin and a tool joint box at drill pipe body two ends.
Fig. 1 shows the structure of existing API standard tool joint.As shown in Figure 1, this tool joint comprises male connection 21 and carries out with it the female adapter 22 that is threaded.Male connection 21 has radially outer outer shoulder 23, radially inner inner face 25 and the base section 29 extended in the axial direction that is set in turn between outer shoulder 23 and inner face 25 and external thread section 27, meanwhile, female adapter 22 has radially outer outer face 24, radially inner interior inclined-plane 26 and the bore hole section 20 extended in the axial direction be set in turn between outer face 24 and interior inclined-plane and internal thread segment 28.The outer shoulder 23 of male connection 21 is L1 to the length of inner face 25, and the outer face 24 of female adapter 22 is L2 to the length on interior inclined-plane 26.
The moment of torsion that above-mentioned joint bears is from the moment of friction between outer shoulder 23 and outer face 24 and between external screw thread 27 and internal thread 28.Because L2 is greater than L1, therefore, the sub-fraction internal thread segment 28 of female adapter 22 is not threaded with the external thread section 27 of male connection 21, and the torsional strength of such API standard tool joint can not meet the drilling requirements of highly difficult drilling well.
According to the drilling rod of API type design, the torsion strength of its joint is generally 80% of drill pipe body, for this reason, there will be female adapter and rise button and the failure conditions such as male connection screw thread fracture when the joint of above-mentioned API standard drill pipe in use runs into excessive torque.
The exploitation in recent domestic oil field turns to the surplus resources exploitation in high exploitation strength maturity factor oil gas field gradually, simultaneously, along with hypotonic, ultra-thin, ultra-deep, ocean, highly corrosive, viscous crude, the exploitation of the oil-gas reservoirs such as super-viscous oil, drilling technique is towards deep-well, ultradeep well, directional well, extended reach well, short radius well, horizontal well, hp-ht well, the Oil/gas Well development of the working condition differences such as deep well and highly corrosive well, the service condition of drilling rod is increasingly severe, the torsional strength of the high resistance twist joint in the drilling rod of existing API standard can not meet the requirement of increasingly harsh drillng operation.
Meanwhile, have higher requirement the fatigue life significantly increasing butt joint screw thread of horizontal well.Adopt the drilling rod of V-038R and the V-050 tooth form in API standard when well bending section rotates, at the bottom of the tooth of joint screw thread, easily produce fatigue crack, after Crack Extension, joint screw thread fracture failure accident easily occurs.
Fig. 2 shows the form of thread of tool joint after improving and the difference between the form of thread of the tool joint in API standard.
This defect of tool joint thread fracture failure is caused in order to the Bottom of Thread solving tool joint easily cracks, as shown in Figure 2, the Bottom of Thread radius of the tool joint A after improving is 0.042 inch and tooth depth is 0.14 inch, the Bottom of Thread radius of this tool joint is greater than the Bottom of Thread radius (0.038 inch) of API standard tool joint B, for this reason, its anti-twisting property is strong, resists stressed fatigue behaviour relatively better.But regardless of the pitch diameter of thread size value of this tool joint A, it all adopts tooth depth to be the form of thread of 0.14 inch.Compare to the tooth depth (0.121844 inch) of API standard tool joint B, the tooth depth of the tool joint A after improvement is higher, under the condition that the pitch diameter of thread is identical, the Bottom of Thread wall thickness of the tool joint A after improvement is thinner, cause the intensity that is threaded of tool joint A lower than meeting API standard tool joint B thus, like this, the Bottom of Thread radius just just in time equaling to counteract tool joint A becomes large brought benefit.
Utility model content
The purpose of this utility model is to provide the tool joint of a kind of antifatigue ultrahigh anti-torsion, and compare to API standard tool joint, its torsional strength improves 70%; Meanwhile, the Bottom of Thread radius of this tool joint is comparatively large, and tooth depth moderate dimensions, with good torsional property and excellent anti-fatigue performance, is specially adapted to the drilling environment of the highly difficult wells such as deep-well, ultradeep well, directional well, horizontal well, high angle hole.
To achieve these goals, the utility model proposes the tool joint of a kind of antifatigue ultrahigh anti-torsion, it comprises male connection and female adapter, in addition,
This male connection has radially outer outer shoulder and radially inner inner face; Along the axial direction of male connection, there is between this outer shoulder and inner face the base section, external thread section and the front section that are connected successively;
This female adapter has radially outer outer face and radially inner interior shoulder; Along the axial direction of female adapter, there is between this interior shoulder and outer face the rearward end section, internal thread segment and the bore hole section that are connected successively;
Wherein, when male connection and female adapter are tightened, external thread section and internal thread segment engagement, outer shoulder contacts with outer face, has the gap of 0-0.5mm between inner face and interior shoulder;
Wherein, the externally threaded pitch of this external thread section is: be less than per inch 4 tooth, is more than or equal to per inch 3 tooth; When externally threaded central diameter≤5 inch, its Bottom of Thread radius is 0.050-0.060 inch, and tooth depth is 0.120-0.130 inch, as pitch diameter of external thread > 5 inches, its Bottom of Thread radius is 0.045-0.050 inch, and tooth depth is 0.140-0.150 inch; The internal thread of internal thread segment has the pitch identical with external screw thread, Bottom of Thread radius and tooth depth.
Compare to API standard tool joint, inner face in antifatigue ultrahigh anti-torsion described in the utility model tool joint and the gap between interior shoulder is maximum is no more than 0.5mm, like this, when super moment of torsion being detained or down-hole moment of torsion is excessive, the gap of the inner face of male connection and the interior shoulder of female adapter can reduce until disappear gradually, tool joint part is made to define a rigid body, improve torsional strength and the bending resistance of tool joint, make the torsional strength of tool joint higher than API standard tool joint.
In addition, the technical solution of the utility model sets for the externally threaded pitch of the external thread section in tool joint, Bottom of Thread radius and tooth depth, and meanwhile, the internal thread of internal thread segment has the pitch identical with external screw thread, Bottom of Thread radius and tooth depth.It should be noted that, although externally threaded pitch, Bottom of Thread radius and tooth depth are number range, but, because the male connection of tool joint and female adapter realize both being threaded by external screw thread and internal thread, therefore, in set number range, the pitch of internal thread, Bottom of Thread radius and tooth depth and externally threaded pitch, Bottom of Thread radius and tooth depth are one to one.
In addition, existing tool joint no matter its pitch diameter of thread size, its tooth depth all adopts the form of thread of 0.14 inch, be different from existing tool joint, two kinds of situations when the technical solution of the utility model is less than or equal to 5 inches for the externally threaded central diameter of tool joint respectively and when externally threaded central diameter is greater than 5 inches, different restrictions has been carried out for Bottom of Thread radius and tooth depth, and adjust screw thread tooth depth size according to the size of Bottom of Thread radius, to avoid the reduction of Bottom of Thread wall thickness, thus ensure that root radius increases the benefit brought, and then improve the ability that fatigue crack resisted by drilling rod, promote the anti-fatigue performance of tool joint.
Further, in antifatigue ultrahigh anti-torsion described in the utility model tool joint, the externally threaded pitch of above-mentioned thread segment is per inch 3.5 tooth.
Further, in antifatigue ultrahigh anti-torsion described in the utility model tool joint, when externally threaded central diameter≤5 inch, its Bottom of Thread radius is 0.050 inch, tooth depth is 0.125 inch, as pitch diameter of external thread > 5 inches, its Bottom of Thread radius is 0.045 inch, and tooth depth is 0.14 inch.
Further, in antifatigue ultrahigh anti-torsion described in the utility model tool joint, above-mentioned external thread section extends to last externally threaded tapering adjacent with base section from adjacent with front section first external screw thread and is not more than 1:12.
Because the male connection in tool joint and female adapter realize both connections by external screw thread and internal thread, therefore, internal and external screw thread section should be mutually mate, that is, the externally threaded tapering in male connection is identical with the tapering of the internal thread in female adapter.Given this, internal thread segment extends to last externally threaded tapering adjacent with rearward end section from adjacent with bore hole section first internal thread and is also not more than 1:12, and in set number range, the tapering of external thread section and the tapering of internal thread segment are Corresponding matchings.
Further, in antifatigue ultrahigh anti-torsion described in the utility model tool joint, it is 1:16 that above-mentioned external thread section extends to last externally threaded tapering adjacent with base section from adjacent with front section first external screw thread.
The tapering that the high resistance twist joint comparing to API standard is taked is 1:6, the tapering of tool joint of the present utility model is comparatively mild, for this reason, the contact area of the inner face of male connection and the interior shoulder of female adapter must be greater than the contact area of the same area of high resistance twist joint, thus its moment of friction produced must be greater than the moment of friction that high resistance twist joint same area produces, and then further increasing the torsional strength of tool joint.
Further, in antifatigue ultrahigh anti-torsion described in the utility model tool joint, the external diameter of above-mentioned front section is greater than external screw thread extends to the thread root at inner face place external diameter along taper direction, but is less than the external diameter of first the externally threaded thread root adjacent with front section.
Further, in antifatigue ultrahigh anti-torsion described in the utility model tool joint, be greater than the length of outer shoulder to inner face of API standard drill pipe male connection from the length above-mentioned outer shoulder to inner face, but be less than the length of outer face to interior inclined-plane of API standard drill pipe female adapter.
Further, in antifatigue ultrahigh anti-torsion described in the utility model tool joint, when above-mentioned male connection is connected with female adapter, there is between front section and rearward end section gap in the radial direction, like this, efficiently avoid moment of torsion excessive time internal and external screw thread joint to rise button and cause screw thread to rupture.
Further, in antifatigue ultrahigh anti-torsion described in the utility model tool joint, above-mentioned gap is in the radial direction at least 0.5mm.
Antifatigue ultrahigh anti-torsion described in the utility model tool joint is arranged by gap between inner face and interior shoulder and the design of the externally threaded pitch of external thread section, Bottom of Thread radius and tooth depth, make this tool joint with good anti-fatigue performance and torque resistant ability, its torsional strength is higher than API standard tool joint, compared with API standard tool joint, its torsional strength improves about 70%.
In addition, antifatigue ultrahigh anti-torsion described in the utility model tool joint is provided with gap between externally threaded front section and the rearward end section of internal thread, reduces tool joint and to rise the risk of button, thread gluing, improve the sticky thread resistance energy of tool joint.
In addition, antifatigue ultrahigh anti-torsion described in the utility model tool joint can be applicable to the probing work of the highly difficult wells such as deep-well, ultradeep well, directional well, horizontal well, high angle hole.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing tool joint.
Fig. 2 be the form of thread of tool joint and the form of thread of API standard tool joint after improving compare schematic diagram.
Fig. 3 is the structural representation of antifatigue ultrahigh anti-torsion described in the utility model tool joint under a kind of embodiment.
Fig. 4 be the tooth form of antifatigue ultrahigh anti-torsion described in the utility model tool joint under a kind of embodiment with the V-050 tooth form of API standard tool joint compare schematic diagram.
Fig. 5 be the tooth form of antifatigue ultrahigh anti-torsion described in the utility model tool joint under another kind of embodiment with the V-038R tooth form of API standard tool joint compare schematic diagram.
Detailed description of the invention
Below in conjunction with Figure of description and specific embodiment, antifatigue ultrahigh anti-torsion described in the utility model tool joint is made further explanation, but this explanation and explanation do not form improper restriction to the technical solution of the utility model.
Fig. 3 shows the structure of antifatigue ultrahigh anti-torsion described in the utility model tool joint under a kind of embodiment.
As shown in Figure 3, the antifatigue ultrahigh anti-torsion tool joint under this kind of embodiment comprises male connection 3 and female adapter 4, male connection 3 has radially outer outer shoulder 31 and radially inner inner face 32, along the axial direction of male connection, there is between shoulder 31 and inner face 32 base section 33 outside that be connected successively, external thread section 34 and front section 35, female adapter 4 has radially outer outer face 41 and radially inner interior shoulder 42, along the axial direction of female adapter, there is the rearward end section 43 be connected successively between interior shoulder 42 and outer face 41, internal thread segment 44 and bore hole section 45, when male connection 3 and female adapter 4 are tightened, external thread section 34 and internal thread segment 44 engage, outer shoulder 31 contacts with outer face 41, gapless between inner face 32 and interior shoulder 42, the external diameter of front section 35 is greater than external screw thread extends to the thread root at inner face 32 place external diameter along taper direction, but be less than the external diameter of first the externally threaded thread root adjacent with front section 35.The externally threaded pitch of external thread section 34 is per inch 3.5 tooth, its externally threaded central diameter≤5 inch, its Bottom of Thread radius is 0.050 inch, its tooth depth is 0.125 inch, and the internal thread of internal thread segment 44 has the pitch identical with external screw thread 34, Bottom of Thread radius and tooth depth, meanwhile, external thread section 34 extends to last externally threaded tapering adjacent with base section 33 from adjacent with front section 35 first external screw thread is 1:16.
In addition, when male connection 3 is connected with female adapter 4, have gap a in the radial direction between front section 35 and rearward end section 43, this gap a is more than or equal to 0.5mm.
In addition, can have certain gap between inner face and interior shoulder, this gap can be the numerical value being greater than 0 and being less than or equal to 0.5mm.
Compare to the API standard tool joint shown in Fig. 1, in the antifatigue ultrahigh anti-torsion tool joint shown in Fig. 3, length L3 from outer shoulder 31 to inner face 32 is greater than the length L1 of outer shoulder 23 to inner face 25 of API standard drill pipe male connection, but be less than the length L2 of outer face 24 to interior inclined-plane 26 of API standard drill pipe female adapter, and the length L4 from outer face 41 to interior shoulder 42 is also greater than the length L1 of outer shoulder 23 to inner face 25 of API standard drill pipe male connection, but be less than the length L2 of outer face 24 to interior inclined-plane 26 of API standard drill pipe female adapter.In the technical solution of the utility model, 0mm≤L4-L3≤0.5mm, the clearance range namely between inner face 32 and interior shoulder 42 is 0-0.5mm, specific to present embodiment, this gap value is 0mm, that is, and gapless between inner face 32 and interior shoulder 42.
Under another kind of embodiment, the structure of this antifatigue ultrahigh anti-torsion tool joint is identical with the structure of the antifatigue ultrahigh anti-torsion tool joint under above-mentioned embodiment, difference is, its pitch diameter of external thread > 5 inches, its Bottom of Thread radius is 0.045 inch, and tooth depth is then 0.140 inch.
The tooth form that Fig. 4 and Fig. 5 respectively illustrates antifatigue ultrahigh anti-torsion described in the utility model tool joint under different embodiment with the difference of the tooth form of API standard tool joint.
In the diagram, the V-038R tooth form that the tooth form of antifatigue ultrahigh anti-torsion described in the utility model tool joint is labeled as 5, API standard tool joint is labeled as 6.As shown in Figure 4, when the pitch diameter of thread≤5 inch, the Bottom of Thread radius of the tooth form 5 of antifatigue ultrahigh anti-torsion tool joint is 0.050 inch, its screw thread tooth depth is 0.125 inch, the Bottom of Thread radius of the V-038R tooth form 6 of API standard tool joint is then 0.038 inch, and its screw thread tooth depth is 0.121844 inch.
In Figure 5, the V-050 tooth form that the tooth form of antifatigue ultrahigh anti-torsion described in the utility model tool joint is labeled as 7, API standard tool joint is labeled as 8.As shown in Figure 5, as pitch diameter of thread > 5 inches, the Bottom of Thread radius of the tooth form 7 of antifatigue ultrahigh anti-torsion tool joint is 0.045 inch, its screw thread tooth depth is 0.14 inch, and the Bottom of Thread radius of the V-050 tooth form 8 of API standard tool joint is 0.025 inch, its screw thread tooth depth is 0.147804 inch.
As can be seen from Figure 4 and Figure 5, the Bottom of Thread radius of the tooth form of antifatigue ultrahigh anti-torsion described in the utility model tool joint is all greater than the Bottom of Thread radius of the tooth form of API standard tool joint, and therefore, its fatigue life improves significantly; And the screw thread tooth depth of the tooth form of antifatigue ultrahigh anti-torsion described in the utility model tool joint is all substantially identical with the screw thread tooth depth of the tooth form of API standard tool joint, that is, the intensity that is threaded of tool joint of the present utility model also can compare favourably with the intensity that is threaded of API standard tool joint, the benefit that the increase of not offsetting Bottom of Thread radius brings.
It should be noted that, the pitch of the internal thread of internal and external screw thread section, Bottom of Thread radius and tooth depth are all identical.
From above, compare to API standard tool joint, the torsional strength of antifatigue ultrahigh anti-torsion of the present utility model tool joint (A1-A2) has had and has promoted significantly, wherein, the torsional strength of the tool joint of A1 improves 102.7% than the torsional strength of the tool joint of B1, and the torsional strength of the tool joint of A2 improves 105.8% than the torsional strength of the tool joint of B2, therefore antifatigue ultrahigh anti-torsion of the present utility model tool joint has good torsional strength.
The Bottom of Thread radius of antifatigue ultrahigh anti-torsion of the present utility model tool joint is greater than the Bottom of Thread radius of API standard tool joint, and its thread is high to be of moderate size, the dual purpose improving torsional property and promote anti-fatigue performance can be reached, for this reason, the probing work of the highly difficult wells such as deep-well, ultradeep well, directional well, horizontal well, high angle hole is particularly useful for.
That enumerates it should be noted that above is only specific embodiment of the utility model, and obvious the utility model is not limited to above embodiment, has many similar changes thereupon.If all distortion that those skilled in the art directly derives from content disclosed in the utility model or associates, protection domain of the present utility model all should be belonged to.
Claims (9)
1. an antifatigue ultrahigh anti-torsion tool joint, it comprises male connection and female adapter, it is characterized in that:
Described male connection has radially outer outer shoulder and radially inner inner face; Along the axial direction of male connection, there is between described outer shoulder and inner face the base section, external thread section and the front section that are connected successively;
Described female adapter has radially outer outer face and radially inner interior shoulder; Along the axial direction of female adapter, there is between described interior shoulder and outer face the rearward end section, internal thread segment and the bore hole section that are connected successively;
Wherein, when described male connection and female adapter are tightened, described external thread section and internal thread segment engagement, described outer shoulder contacts with outer face, has the gap of 0-0.5mm between described inner face and interior shoulder;
Wherein, the externally threaded pitch of described external thread section is: be less than per inch 4 tooth, is more than or equal to per inch 3 tooth; When externally threaded central diameter≤5 inch, its Bottom of Thread radius is 0.050-0.060 inch, and tooth depth is 0.120-0.130 inch, as pitch diameter of external thread > 5 inches, its Bottom of Thread radius is 0.045-0.050 inch, and tooth depth is 0.140-0.150 inch; The internal thread of described internal thread segment has the pitch identical with external screw thread, Bottom of Thread radius and tooth depth.
2. antifatigue ultrahigh anti-torsion tool joint as claimed in claim 1, it is characterized in that, the externally threaded pitch of described external thread section is per inch 3.5 tooth.
3. antifatigue ultrahigh anti-torsion tool joint as claimed in claim 1 or 2, it is characterized in that, when externally threaded central diameter≤5 inch, its Bottom of Thread radius is 0.050 inch, tooth depth is 0.125 inch, as pitch diameter of external thread > 5 inches, its Bottom of Thread radius is 0.045 inch, and tooth depth is 0.14 inch.
4. antifatigue ultrahigh anti-torsion tool joint as claimed in claim 1, it is characterized in that, described external thread section extends to last externally threaded tapering adjacent with described base section from adjacent with front section first external screw thread and is not more than 1:12.
5. antifatigue ultrahigh anti-torsion tool joint as claimed in claim 4, it is characterized in that, described tapering is 1:16.
6. antifatigue ultrahigh anti-torsion tool joint as claimed in claim 4, it is characterized in that, the external diameter of described front section is greater than described external screw thread extends to the thread root at inner face place external diameter along taper direction, but is less than the external diameter of first the externally threaded thread root adjacent with described front section.
7. antifatigue ultrahigh anti-torsion tool joint as claimed in claim 1, it is characterized in that, be greater than the length of outer shoulder to inner face of API standard drill pipe male connection from the length described outer shoulder to inner face, but be less than the length of outer face to interior inclined-plane of API standard drill pipe female adapter.
8. antifatigue ultrahigh anti-torsion tool joint as claimed in claim 1, is characterized in that, when described male connection is connected with female adapter, having gap in the radial direction between described front section and rearward end section.
9. antifatigue ultrahigh anti-torsion tool joint as claimed in claim 8, it is characterized in that, described gap is in the radial direction at least 0.5mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420560392.2U CN204186304U (en) | 2014-09-26 | 2014-09-26 | The tool joint of a kind of antifatigue ultrahigh anti-torsion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420560392.2U CN204186304U (en) | 2014-09-26 | 2014-09-26 | The tool joint of a kind of antifatigue ultrahigh anti-torsion |
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| CN204186304U true CN204186304U (en) | 2015-03-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437551A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-torsion-resistance drill pipe connector with good sealing |
| CN107850243A (en) * | 2015-06-15 | 2018-03-27 | S.P.M.流量控制股份有限公司 | Full root radius screw thread wing nut with increase wall thickness |
| CN112943120A (en) * | 2021-04-22 | 2021-06-11 | 中国铁建重工集团股份有限公司 | Rock drilling device |
-
2014
- 2014-09-26 CN CN201420560392.2U patent/CN204186304U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850243A (en) * | 2015-06-15 | 2018-03-27 | S.P.M.流量控制股份有限公司 | Full root radius screw thread wing nut with increase wall thickness |
| CN106437551A (en) * | 2016-11-15 | 2017-02-22 | 东营威玛石油钻具有限公司 | High-torsion-resistance drill pipe connector with good sealing |
| CN112943120A (en) * | 2021-04-22 | 2021-06-11 | 中国铁建重工集团股份有限公司 | Rock drilling device |
| CN112943120B (en) * | 2021-04-22 | 2022-11-15 | 中国铁建重工集团股份有限公司 | Rock drilling device |
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