CN2386183Y - Direct connecting type oil casing pipe - Google Patents
Direct connecting type oil casing pipe Download PDFInfo
- Publication number
- CN2386183Y CN2386183Y CN 99211519 CN99211519U CN2386183Y CN 2386183 Y CN2386183 Y CN 2386183Y CN 99211519 CN99211519 CN 99211519 CN 99211519 U CN99211519 U CN 99211519U CN 2386183 Y CN2386183 Y CN 2386183Y
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- CN
- China
- Prior art keywords
- thread
- screw
- casing pipe
- threaded
- screw thread
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- Expired - Lifetime
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Earth Drilling (AREA)
Abstract
The utility model relates to a direct connecting type oil casing pipe, which comprises a pipe body and a screw-threaded connecting part with internal screw threads 1 and external screw threads 2. The external diameter Dm of the screw-threaded connecting part is larger than the external diameter D which is smaller than 5 inches. A tooth shape of the screw-threaded connecting part is a complete buckle shape, and the screw-thread tooth shape is a deflective trapezoid. The Dm-D is smaller than 0.001. The screw-thread initiating end of the internal screw-thread and the lost end of the external screw threads are provided with circular beads for preventing torque, and the taper of the screw threads along the diameter direction is two or more and two variable value. The utility model improves the structure of a direct connecting type casing pipe to ensure that the pipe which is smaller than 5 inches can reach the strength required by oil field work conditions. Thus, the manufacture and the measurement are easy.
Description
The utility model relates to a kind of oil drilling sleeve pipe, particularly direct linkage type petroleum casing pipe.
For a long time, the sleeve pipe that use in the oil field is generally pressed the API standard production, i.e. threading on body, and machining internal thread on box cupling, internal and external threads is connected to form tubing string.This oil casing threaded type of attachment pipe diameter is little, and the box cupling diameter is big, and when digging a well in the early stage, bushing outer surface directly contacts with stratum and cement seal, and the contact external diameter is big slightly, does not generally influence normal use, and this is a large amount of at present products that use.In addition, also has the direct linkage type sleeve pipe, generally be to be applied to old well reparation and other oil field use littler than same specification conventional oil sleeve pipe (band box cupling) external diameter, though API standard (API Std.5B) has also proposed the outturn sample of direct linkage type sleeve pipe, and provided relevant size design, but this structure there are the following problems: 1. applicable scope is greater than 5 inches (the body minimum outer diameter is 127mm); 2. processing difficulties, embody a concentrated reflection of two aspects: it is too high promptly to seal machining accuracy, present equipment is placed on the structure of thread inside in the sealing surface position to the direct linkage type sleeve pipe, generally do not reach this precision that can play effective sealing, screw thread adopts part complete thread and part incomplete thread structure, incomplete thread adopts horizontal tooth top withdrawing, and screw thread flank of tooth burr can't or be difficult to remove; 3. owing to have complete thread and incomplete thread, screw thread in-site measurement difficulty.
The purpose of this utility model is the structure that obtains a kind of direct linkage type sleeve pipe, can be used for the body external diameter less than 5 inches petroleum casing pipe, and guarantees to obtain required working strength and bonding strength, handling ease, and it is convenient to measure.
For achieving the above object, the technical solution that the utility model proposes is:
A kind of direct linkage type petroleum casing pipe, it comprises: body and the part that is threaded that internal thread 1 and external screw thread 2 are arranged, the outer diameter D m of the part that is threaded is greater than the body outer diameter D, and the described profile of tooth that is threaded part is complete button shape.
The be threaded outer diameter D m of part and the pass of body outer diameter D is: Dm-D 〉=0.001 meter.
The screw initial thread end of internal thread and externally threaded screw thread disappear to hold anti-torque shoulder.
Screw thread is a changing value more than 2 or 2 along diametric tapering.
The body outer diameter D is less than 5 inches.
Thread tooth is for trapezoidal partially.
Below in conjunction with Figure of description and embodiment the utility model is done and to be described in further detail:
Fig. 1 is the utility model direct linkage type petroleum casing pipe sectional drawing.
Fig. 2 is the sectional drawing of male end threaded portion among Fig. 1.
Fig. 3 is the sectional drawing of female end threaded portion among Fig. 1.
Referring to Fig. 1, the direct connecting type oil casing pipe that the utility model obtains, its sleeve pipe length overall is L (L=3～16 meter), D is the external diameter of this sleeve pipe mid portion, D=0.078～0.178 is meter (prominent Broken minimum outer diameter among the API Std.5B greater than 0.127 meter restriction), d be this sleeve pipe in Directly, d=0.068～0.168 meter, 0.025 〉=D-d 〉=0.008 meter.
Improvement of the present utility model is to add at the external diameter of the screw thread processing part at screw thread two ends Thick, namely the D outer diameter m of pipe end (or Dg) is greater than the body D outer diameter, Dm=0.080～0.180 Rice, Dm-D 〉=0.001 meter. Lg be external screw thread external upset (EU) part length (Lg=0.43～0.243 rice), Dg is the diameter (Dg=0.080～0.180 meter) of external screw thread external upset (EU) part, Dm For the diameter of this sleeve pipe other end (machining internal thread part) reinforcement (Dm=0.080～0.180 rice), Lm is the length (Lm=0.43～0.243 meter) of this reinforcement.
Because direct connecting type oil casing pipe of the present utility model has upset end at screw connection point, Therefore can guarantee that its thread tooth is complete button all, useful thread is lengthened, protect Demonstrate,prove required intensity. The direct connecting type oil casing pipe of API standard has the imperfect profile of tooth of part at present, The length of threaded portion is longer, but useful thread is not long, is applied in large diameter pipe and satisfies Intensity can satisfy, and tubule is then not all right.
In addition, the screw thread of this direct connecting type oil casing pipe is 2 or 2 along diametric tapering Above changing value; The screw thread of externally threaded screw initial thread end and internal thread disappears to hold anti-turning round The square shoulder.
Referring to Fig. 2, about the male end threaded portion, Ly is run out of thread to pipe end among the figure Length, this length control screw thread processing length and the interference when preventing from being connected with internal thread. Lw Be the length of thread head to the shoulder part, dy is the minimum diameter after the thread head chamfering. Dt is the diameter on the screw thread shoulder section face of cylinder, and θ is the pipe end chamfer angle.
The screw thread button-type adopts inclined to one side buttress thread, connects the slippage ability to increase it. Simultaneously for Improve sealability and anti-slip ability, screw thread is divided into three sections, i.e. L1、L
2、L
3, three sections Screw thread adopts different taper values. Specific requirement is: L1The section screw thread is 1/18 ± 1/149, L at diametric tapering2The section screw thread is 1/16 ± 1/250, L3The section screw thread is I/16 ± 1/149.
Three sections externally threaded length are: L1＝(1/10～1/3)Ly，L
3=(1/10～1/3) Ly, then L2＝Ly-L
1-L
3，
Equally, see Fig. 3, about the female end threaded portion, Lu arrives for the box thread end point among the figure The distance of pipe end, Li is the initial distance to pipe end of box thread, Dt is the box thread pilot seal The diameter of face, α are the logical nose angle degree of run out of thread place bore hole. Screw thread is divided into three sections, namely L4、L
5、L
6Three sections screw threads adopt the taper value on the different diametric(al)s, L4The section screw thread is 1/16 ± 1/149, L5The section screw thread is 1/16 ± 1/250, L6The section screw thread is 1/18 ± 1/149, this Sample can guarantee the cooperation of internal and external threads.
The length of each section internal thread is: L4＝(1/10～1/3)(Lu-Li)，L
6＝(1/10～
1/3)(Lu-Li)。
The screw thread of externally threaded screw initial thread end and internal thread disappears to hold anti-torque shoulder.Box thread circular bead surface thickness is Dm-Dt, requires 0.002≤Dm-Dt≤0.008 (rice), and the reinforcement wall thickness is Dt-d, requires Dt-d＞Lu/16+0.005 (rice).
Connect cooperation in order to guarantee that male thread and box thread are twisted, then the pass of male and female thread parameter is Li＞Lw-Ly, requires Lw-Ly 〉=0.01 (rice),
Lu-Li＞Ly requires Lu-Li 〉=0.01 (rice),
Dt-dt≤0.001
Lu 〉=Lw+0.001 (rice)
Introduce embodiment of the present utility model below.
Casing grade N80, material 42MnMo7, through forming the sleeve pipe blank after the hot rolling, after two ends thickening and heat treatment (modified) form pipe, basic size is as follows:
Casing length L=9 rice
Sleeve pipe outer diameter D=4 " (φ 101.6mm)
Male end screw thread external upset (EU) length L g=140mm, diameter is Dg=φ 104.0mm
Female end screw thread external upset (EU) length L m=140mm, diameter is Dm=φ 104.0mm
Casing inner diameter d=φ 86.0mm
At male thread portion, pitch is per inch (25.4mm) 8 teeth, the inclined to one side trapezoid buckle of standard, wherein: Lw=76mm, Ly=68mm, dy=φ 90.0mm, dt=98.0mm, L
1=12.7mm, L
2=42.6mm, L
3=12.7mm, θ=25 °, L
1The section thread taper is 1/18, L
2The section thread taper is 1/16, L
3The section thread taper is 1/15.5.
At female thread portion: pitch is per inch (25.4mm) 8 teeth, the inclined to one side trapezoid buckle of standard,
Wherein: Dt=89.0mm, Li=10.0mm, Lu=80.0mm, α=40 °, L
4=12.9mm, L
5=44.2mm, L
6=12.9mm, L
4The section thread taper is 1/16.5, L
5The tapering of section screw thread is 1/16, L
6The tapering of section screw thread is 1/18.
Compared with prior art, the utility model changes the structure of straight-connecting sleeve pipe Advance, pipe adopts all complete buckle-shaped, and has increased upset end, prevented torque shoulder and change Taper thread can guarantee that the pipe less than 5 inches reaches the required intensity of oil field operating condition, makes Processing, measurement are easily.
Claims (6)
1. direct linkage type petroleum casing pipe, it comprises: body and the part that is threaded of internal thread 1 and external screw thread 2 is arranged, it is characterized in that: the outer diameter D m of the part that is threaded is greater than the body outer diameter D, and the described profile of tooth that is threaded part is complete button shape.
2. direct linkage type petroleum casing pipe according to claim 1 is characterized in that: the described outer diameter D m of part and the pass of body outer diameter D of being threaded is: Dm-D 〉=0.001 meter.
3. direct linkage type petroleum casing pipe according to claim 1 is characterized in that: the screw initial thread end of described internal thread and externally threaded screw thread disappear to hold anti-torque shoulder.
4. direct linkage type petroleum casing pipe according to claim 1 is characterized in that: described screw thread is a changing value more than 2 or 2 along diametric tapering.
5. direct linkage type petroleum casing pipe according to claim 1 is characterized in that: described body outer diameter D is less than 5 inches.
6. direct linkage type petroleum casing pipe according to claim 1 is characterized in that: described thread tooth is for trapezoidal partially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99211519 CN2386183Y (en) | 1999-02-25 | 1999-05-31 | Direct connecting type oil casing pipe |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99204853 | 1999-02-25 | ||
| CN99204853.2 | 1999-02-25 | ||
| CN 99211519 CN2386183Y (en) | 1999-02-25 | 1999-05-31 | Direct connecting type oil casing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2386183Y true CN2386183Y (en) | 2000-07-05 |
Family
ID=34066090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99211519 Expired - Lifetime CN2386183Y (en) | 1999-02-25 | 1999-05-31 | Direct connecting type oil casing pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2386183Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102492A (en) * | 2011-01-19 | 2011-06-22 | 胜利油田孚瑞特石油装备有限责任公司 | Straight-joint type insulated tubing and processing technology thereof |
| CN104499953A (en) * | 2014-12-22 | 2015-04-08 | 江苏中冶能源设备制造有限公司 | Anticorrosion oil casing |
| CN111898215A (en) * | 2020-07-07 | 2020-11-06 | 中国石油天然气集团有限公司 | Method for selecting special threaded oil casing sealing test sample |
-
1999
- 1999-05-31 CN CN 99211519 patent/CN2386183Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102492A (en) * | 2011-01-19 | 2011-06-22 | 胜利油田孚瑞特石油装备有限责任公司 | Straight-joint type insulated tubing and processing technology thereof |
| CN104499953A (en) * | 2014-12-22 | 2015-04-08 | 江苏中冶能源设备制造有限公司 | Anticorrosion oil casing |
| CN111898215A (en) * | 2020-07-07 | 2020-11-06 | 中国石油天然气集团有限公司 | Method for selecting special threaded oil casing sealing test sample |
| CN111898215B (en) * | 2020-07-07 | 2024-05-28 | 中国石油天然气集团有限公司 | Method for selecting special threaded oil sleeve sealing test sample |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BAOSHAN IRON & STEEL CO., LTD. Free format text: FORMER NAME OR ADDRESS: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD |
|
| CP03 | Change of name, title or address |
Address after: 201900, Fujin Road, Shanghai, Baoshan District orchard Patentee after: Baoshan Iron & Steel Co., Ltd. Address before: 201900 No. 1, middle front road, Baoshan District Shanghai factory Patentee before: Baoshan Iron & Steel (Group) Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |