CN201810224U - Buttress thread casing joint - Google Patents
Buttress thread casing joint Download PDFInfo
- Publication number
- CN201810224U CN201810224U CN2010205111101U CN201020511110U CN201810224U CN 201810224 U CN201810224 U CN 201810224U CN 2010205111101 U CN2010205111101 U CN 2010205111101U CN 201020511110 U CN201020511110 U CN 201020511110U CN 201810224 U CN201810224 U CN 201810224U
- Authority
- CN
- China
- Prior art keywords
- thread
- sleeve pipe
- casing
- male connection
- screw thread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000008878 coupling Effects 0.000 claims abstract description 32
- 238000010168 coupling process Methods 0.000 claims abstract description 32
- 238000005859 coupling reaction Methods 0.000 claims abstract description 32
- 239000003208 petroleum Substances 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
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- Earth Drilling (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model relates to a buttress thread casing joint. Dimensions of a casing outer threaded joint and a casing coupling are 225.4mm, tapers of the casing outer threaded joint and the casing coupling are 1:10, screw pitch is five circles for each 25.4mm thread, and height of the thread is 1.575mm. Other geometric parameters of the casing outer threaded joint include that a thread form angle of a thread guide surface is 10 degrees, a thread form angle of a thread bearing surface is 3 degrees, the diameter D4 of a large end is 225.8mm, the length g of incomplete thread is 50.39mm, the length L7 of complete thread is 64.22mm, the total length L4 from a casing end to an end point plane is 114.62mm, pitch diameter E7 is 223.17mm, and the minimum length Lc from the casing end to full top thread is 64.22mm. Other geometric parameters of the casing coupling includes that a tooth form angle of a thread guide surface is 10 degrees, a tooth form angle of a thread bearing surface is 3 degrees, the outer diameter W of the coupling ranges from 238.1mm to 250.8mm, the minimum length NL of the coupling is 269.88mm, the diameter Q of a boring hole of the coupling is 228.98mm, and the width b of a bearing surface a4 is 9.53mm. The buttress thread casing joint is simple and compact in structure and convenient in use.
Description
Technical field
The utility model relates to a kind of screwed connection, especially a kind of BCSG joint, and specifically a kind of non-standard 225.4mm BCSG joint belongs to the technical field of the sleeve pipe of cementing the well.
Background technology
In recent years, along with the degree of depth of oil drilling further increases, the oil well environment becomes more abominable, and American Petroleum Institute's standardization of casing (being the API standard) is not suitable for the oil well of special operation condition.Squeeze performance demands for the hole condition that satisfies deep well oilfield resists the sleeve pipe height, the body external diameter is 225.4mm, and wall thickness is the 17.1mm sleeve pipe, selects for use in the oil field at home.Because the sleeve pipe of this kind specification belongs to non-API series sleeve pipe, American Petroleum Institute's standardization of casing is the nipple product of this kind specification not.Though the used off-gauge body external diameter in oil field is 225.4mm, wall thickness is the sleeve pipe collapsoing strength raising of 17.1mm, but joint bonding strength and fatigue strength do not improve, and therefore developing the screwed connection that is complementary with it is the technical barrier that present enterprise faces.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of BCSG joint is provided, and it is simple and compact for structure, and is easy to use, can satisfy field working conditions.
According to the technical scheme that the utility model provides, described BCSG joint comprises sleeve pipe male connection and casing coupling; Described sleeve pipe male connection is provided with trapezoidal partially external screw thread, is provided with inclined to one side trapezoidal internal thread in the described casing coupling; Casing coupling and sleeve pipe male connection are fastened and connected by corresponding trapezoidal internal thread partially and trapezoidal partially external screw thread respectively; The dimensions of described sleeve pipe male connection and casing coupling is 225.4mm; The geometric parameter of sleeve pipe male connection is: the tapering of sleeve pipe male connection is 1: 10; The pitch of sleeve pipe male connection is that every 25.4mm ridge number is 5 teeth, and thread depth is 1.575mm; Screw thread spigot surface tooth form angle is 10 °, and screw thread bearing surface tooth form angle is 3 °, outside diameter D
4Be 225.8mm; Incomplete thread length g is 50.39mm, the complete thread length L
7Be 64.22mm, pipe end is to end point plane total length L
4Be 114.62mm, middle footpath E
7Be 223.17mm, screw thread minimum length Lc is 64.22mm from the full top of pipe end; The geometric parameter of casing coupling is: the tapering of casing coupling is 1: 10, the pitch of casing coupling is that every 25.4mm ridge number is 5 teeth, and thread depth is 1.575mm, and screw thread spigot surface tooth form angle is 10 °, screw thread bearing surface tooth form angle is 3 °, and box cupling external diameter W is 238.1～250.8mm; Box cupling minimum length N
LBe 269.88mm, box cupling bore diameter Q is 228.98mm, bearing surface a
4Width b be 9.53mm.
The shoulder that reverses of described sleeve pipe male connection end is-15 ° of reverse shoulders that reverse.
Advantage of the present utility model: sleeve pipe male connection and casing coupling adopt screw thread to be fastened and connected, the sleeve pipe male connection is identical with American Petroleum Institute's 5B standard-required with tolerance between casing coupling, reasonable in design, use easy to maintenance, satisfy advantages such as on-the-spot applying working condition, can on the oil field tubulars body diameter is the non-standard sleeve pipe of 225.4mm, use.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with concrete drawings and Examples.
As shown in Figure 1: the utility model comprises sleeve pipe male connection 1, casing coupling 2 and reverses shoulder 3.
Oil field tubulars is comparatively special with the applied environment of drill bit, need pierce underground darker distance.The external diameter of drill bit body and wall thickness influence the application conditions of drill bit, therefore for uses that be complementary of drill bit body, the dimensions of sleeve pipe male connection 1 and casing coupling 2 is exactly important techniques performance indications.
As shown in Figure 1: described sleeve pipe male connection 1 is provided with trapezoidal partially external screw thread, is provided with inclined to one side trapezoidal internal thread in the casing coupling 2, and casing coupling 2 and sleeve pipe male connection 1 are connected by screw threads for fastening.Described sleeve pipe male connection 1 is 225.4mm with the specification of casing coupling 2, other physical dimensions of described sleeve pipe male connection 1 are: the tapering of sleeve pipe male connection 1 is 1: 10, pitch is that every 25.4mm ridge number is 5 teeth, thread depth is 1.575mm, screw thread spigot surface tooth form angle is 10 °, screw thread bearing surface tooth form angle is 3 °, outside diameter D
4Be 225.8mm; Incomplete thread length g is complete thread plane a
2To end point plane a
5Length be 50.39mm, the complete thread length L
7Be the hand-tight plane a of pipe end
1To complete thread plane a
2Length be 64.22mm, pipe end is to end point plane total length L
4Be 114.62mm, middle footpath E
7Be 223.17mm, screw thread minimum length Lc is 64.22mm from the full top of pipe end; The shoulder 3 that reverses of sleeve pipe male connection 1 end is-15 ° of reverse shoulders that reverse; The geometric parameter of casing coupling 2 is: tapering is 1: 10, and pitch is that every 25.4mm ridge number is 5 teeth, and thread depth is 1.575mm, and screw thread spigot surface tooth form angle is 10 °, and screw thread bearing surface tooth form angle is 3 °, and box cupling external diameter W is 238.1～250.8mm; Box cupling minimum length N
LBe 269.88mm, box cupling bore diameter Q is 228.98mm, bearing surface a
4Width b be 9.53mm.Sleeve pipe male connection 1 is identical with American Petroleum Institute's 5B standard-required with the tolerance of 2 of casing couplings.
During drilling well, adopting off-gauge body external diameter is 225.4mm, and wall thickness is that the internal surface of sleeve pipe of 17.1mm links to each other with the conventional bit that continues to creep into, and the gap is little, can guarantee that drill bit passes through smoothly, and continue to creep into; Casing annulus has enough gaps, can guarantee the cementing concrete ring thickness.The requirement of cementing concrete ring thickness can be satisfied in annular space single face gap outside casing coupling 2 positions.To adopt off-gauge body external diameter be 225.4mm, when wall thickness is the BCSG of 17.1mm, do not need to change existing casing programme and bit size, just can satisfy the oil field requirement.
The utility model sleeve pipe male connection 1 adopts screw thread to be fastened and connected with casing coupling 2, sleeve pipe male connection 1 is identical with American Petroleum Institute's 5B standard-required with the tolerance of 2 of casing couplings, reasonable in design, use easy to maintenance, satisfy advantages such as on-the-spot applying working condition, can on the oil field tubulars body diameter is the non-standard sleeve pipe of 225.4mm, use.
Claims (2)
1. a BCSG joint comprises sleeve pipe male connection (1) and casing coupling (2); Described sleeve pipe male connection (1) is provided with trapezoidal partially external screw thread, and described casing coupling is provided with inclined to one side trapezoidal internal thread in (2); Casing coupling (2) is fastened and connected by corresponding trapezoidal internal thread partially and trapezoidal partially external screw thread respectively with sleeve pipe male connection (1); It is characterized in that: the dimensions of described sleeve pipe male connection (1) and casing coupling (2) is 225.4mm; Other geometric parameter of sleeve pipe male connection (1) is: the tapering of sleeve pipe male connection (1) is 1: 10; The pitch of sleeve pipe male connection (1) is that every 25.4mm ridge number is 5 teeth, and thread depth is 1.575mm; Screw thread spigot surface tooth form angle is 10 °, and screw thread bearing surface tooth form angle is 3 °, outside diameter D
4Be 225.8mm; Incomplete thread length g is 50.39mm, the complete thread length L
7Be 64.22mm, pipe end is to end point plane total length L
4Be 114.62mm, middle footpath E
7Be 223.17mm, screw thread minimum length Lc is 64.22mm from the full top of pipe end; The geometric parameter of casing coupling (2) is: the tapering of casing coupling (2) is 1: 10, the pitch of casing coupling (2) is that every 25.4mm ridge number is 5 teeth, thread depth is 1.575mm, screw thread spigot surface tooth form angle is 10 °, screw thread bearing surface tooth form angle is 3 °, and box cupling external diameter W is 238.1～250.8mm; Box cupling minimum length N
LBe 269.88mm, box cupling bore diameter Q is 228.98mm, bearing surface a
4Width b be 9.53mm.
2. BCSG joint according to claim 1 is characterized in that: the shoulder (3) that reverses of described sleeve pipe male connection (1) end is-15 ° of reverse shoulders that reverse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205111101U CN201810224U (en) | 2010-08-26 | 2010-08-26 | Buttress thread casing joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205111101U CN201810224U (en) | 2010-08-26 | 2010-08-26 | Buttress thread casing joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810224U true CN201810224U (en) | 2011-04-27 |
Family
ID=43893167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205111101U Expired - Lifetime CN201810224U (en) | 2010-08-26 | 2010-08-26 | Buttress thread casing joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201810224U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288553A (en) * | 2017-07-24 | 2017-10-24 | 延安守山机械制造有限公司 | A kind of buttress thread |
-
2010
- 2010-08-26 CN CN2010205111101U patent/CN201810224U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288553A (en) * | 2017-07-24 | 2017-10-24 | 延安守山机械制造有限公司 | A kind of buttress thread |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20140922 Granted publication date: 20110427 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20150322 Granted publication date: 20110427 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |