CN202954751U - Thread casing pipe connector capable of being quickly screwed on and screwed off - Google Patents
Thread casing pipe connector capable of being quickly screwed on and screwed off Download PDFInfo
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- CN202954751U CN202954751U CN 201220638301 CN201220638301U CN202954751U CN 202954751 U CN202954751 U CN 202954751U CN 201220638301 CN201220638301 CN 201220638301 CN 201220638301 U CN201220638301 U CN 201220638301U CN 202954751 U CN202954751 U CN 202954751U
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Abstract
A thread casing pipe connector capable of being quickly screwed on and screwed off comprises a pipe body and a coupling, wherein the pipe body matches with the coupling in a mode of internal threads and external threads. A thread form structure of matching the external threads of the pipe body with the internal threads of the coupling is in a double-end buttress thread structure. The ratio of an angle tau between thread tooth crest and generatrix to an angle tau between tooth bottom conical degree and the generatrix is from 1:12 to 1:16. A bearing angle alpha of the threads is from -5 degrees to 3 degrees. A guiding angle beta of the threads is from 10 degrees to 50 degrees. The tooth width t of the threads is 0.1 inch. The lead of screw thread P is 2.5 teeth per inch, namely, 10.16 millimeters. A hole Q is additionally formed in an end opening of the coupling. The thread casing pipe connector capable of being quickly screwed on and screwed off has the advantages of being convenient to buckle in a butt joint mode, and capable of being quickly screwed on, shortening screwing and connecting time of casing pipes, and reducing cost of offshore oil drilling.
Description
Technical field
The utility model relates to petroleum pipeline, particularly a kind of screwed connection of unloading on fast.
Background technology
Drillng operation expense and sleeve pipe cost are the important component parts in the oil-gas mining process, especially take operation on the sea as representative.Operation on the sea is with high costs, every mouthful of offshore drilling uses the sleeve pipe use amount more than 2000～6000 meters, sleeve pipe is twisted and is connect number of times more than 200～600 times, only entering well twists and to connect the time in 2～5 days, the expense of every day operation on the sea ship for rental and operation is all up to units up to a million, thereby in the drilling process of complicated maritime environment, it is extremely important that efficient seems.Sleeve pipe be lowered to efficient, the safety factor of sleeve pipe and joint comprises that joint efficiency, sealability etc. are to weigh offshore drilling with the important indicator of casing product.
API casing joint commonly used comprises round thread and buttress thread.API round thread profile of tooth adopts and is guiding and the bearing surface of 30 °, and pitch is 3.175mm, and tapering is 1: 16.The characteristics of round thread are that make-up is easy, but its joint efficiency generally only has 80% left and right, have eely shortcoming, and upper break-out speed is slow, enters the well inefficiency.API buttress thread profile of tooth adopts the design of 10 ° of spigot surfaces and 3 ° of bearing surfaces, and pitch is 5.08mm, and when external diameter was 4-1/2 " (inch)～13-3/8 " (inch), the tapering of screw thread was 1: 16; External diameter is greater than 16, and " when (inch), the tapering of screw thread is 1: 12.The characteristics of buttress thread joint are that joint efficiency is high, but it is applied in marine honeycomb fashion drillng operation, the make-up poor-performing, and easy thread alternating, and make-up speed is low, enters the well inefficiency.The round thread of API standard and buttress thread joint have the low inferior position of upper break-out speed when being applied in operation on the sea, virtually increased operating cost.
Chinese patent CN201020506375.2 has designed a kind of fast upper retaining ring union of fast upper shackle, joint screw thread adopts improved partially trapezoidal composition, pitch is 4 teeth/per inch, and thread taper 1: 12, make-up speed are to improve 20% left and right than standard A PI sleeve pipe.But the fast upper shackle of this joint is by profile of tooth pitch being increased, change the screw thread pattern and realize, having reduced the line length that meshes between screw thread.
Chinese patent CN200720096474.6 provides a kind of Special screwed joint of petroleum sleeve pipe, and this joint design is made of sleeve external thread spare and coupling inner thread spare, and its thread taper is 1: 11.76, and pitch is 4 teeth/per inch; Sleeve pipe is positioned at the box cupling link and is provided with step, and boss is set in box cupling, step end face and raised head face close contact.This patent has adopted the structure of 4 teeth/in, has improved to a certain extent upper button efficient, but also has the situation of make-up difficulty for the heavy caliber sleeve pipe.
Chinese patent CN200710134704.8 Special screwed joint of petroleum sleeve pipe, described external thread piece is connected with a joggle togather by screw thread and box cupling, it is characterized in that: the tapering of screw thread is 1: 6～1: 8, the pitch of screw thread is per inch 3 teeth, the height of screw thread is 2.05～2.45mm, is parallel to the axis of pipe at the bottom of the tooth top of screw thread, tooth.This patent structure has adopted the thread taper of 1: 6～1: 8, has increased the risk that thread off lost efficacy; Exist simultaneously " J " ring to distinguish in the middle part of box cupling, easily go into eddy current thus, cause the serious erosion of double thread.
Chinese patent CN98207389.5 provides a kind of nipple for the oil field, and this nipple is comprised of the screw connection structure that is used for structural integrity and the metallic sealing section structure that is used for sealing integrity.Form of thread form of structure is for partially trapezoidal or circular.The major and minor metal sealing form that this patent adopts is reasonably for having the demanding product of hermetic seal, but due to upper button inefficiency, inapplicable with sleeve pipe for drilling at the sea.
Chinese patent ZL201120362137.3 provides a kind of high-speed screwing-on nipple, and this joint increases screw thread guiding angle by increasing thread pitch and tapering, has make-up easy, the characteristics that upper button improves, but it is limited to detain the efficient increase rate it on, and difficulty of processing and cost all higher.
Summary of the invention
The purpose of this utility model is to design a kind of screwed connection of unloading on fast, easily make-up, upper button fast, and reentrant bushing is twisted the time that connects, and reduces the marine drilling cost.
For achieving the above object, the technical solution of the utility model is:
A kind of screwed connection of unloading on fast comprises body and the box cupling of outer screw-internal thread fit; The form of thread form of structure that described body external screw thread coordinates with coupling inner thread is double end buttress thread structure, between screw thread tooth top, tooth base cone degree and bus angle τ become 1: 12～between 1: 16, screw thread carrying angle [alpha]-5 °～3 °, 10 °～50 ° of screw thread guiding angle betas; Screw thread facewidth t is 0.1 inch, and lead P is 2.5 tooth/inch, i.e. 10.16mm; Increase Q hole design in the box cupling port, the inner diameter values Q in box cupling D outer diameter, Q hole and the corresponding relation of length value q are:
What relate in prior art is the partially trapezoidal BTC series 5 tooth/inches of API standard code or the nipple of LTC series 8 tooth/inches, and all the other non-standard series are all to adopt the nipple of 3-8 tooth/inch.
In the utility model casing joint design:
1, the external structure size of standard
Casing joint structural outer size comprises box cupling outside dimension and tolerance thereof, body size and tolerance thereof, and the product structure external dimensions that the utility model is set forth is identical with the API standard.
Normal sleeve joint design external dimensions can guarantee the enough strength demands of joint oil, each user, sleeve pipe producer has also just made the preparation of use, processing for these standard sizes, enter as design, the sleeve pipe of drilling well that stubborn in the well process connects, the outfit of down-hole Work tool; That the processing claw that sleeve pipe is produced, pipe are twisted is claw, tube rolling box cupling etc.Thereby the external dimensions of Application standard can satisfy under performance requirement, is convenient to use, production of sleeve pipe etc.
2, the screw thread Design of Tooth Width of Right Shaft of standard
The product that the utility model is set forth adopts 0.1 inch (2.54mm) facewidth t design, and purpose is in order to guarantee that upper structure has the entity performance identical with standard A PI BTC.
3, double thread design
Existing standard or traditional nonstandard casing thread connection all adopt the thread forms of single head, the product that the utility model is set forth adopts the double thread design, namely under connection, compression, the assurance prerequisite of sealing performance in the facewidth of 0.1 inch t, actual lead P is 2.5 tooth/inches, and actual twisting connects button speed and double than the joint of 5 tooth/inches.
4, buttress thread pattern design
Adopt the screw thread pattern design of inclined to one side trapezoid cross section, become 1: 12 between screw thread tooth top, tooth base cone degree and bus～between 1: 16, between screw thread carrying angle-5 °～3 °, between 10 °～50 ° of screw thread guiding angles.The utility model adopts the design of buttress thread pattern, is conducive to guarantee joint bonding strength, compression performance and sealing performance.
5, make-up Q hole design
Box cupling (joint female end) adopts the design in Q hole, can effectively guarantee double thread make-up performance, the thread gluing of avoiding thread alternating or maloperation to cause.
In a word, the utility model is when guaranteeing that joint satisfies standard A PI joint entity performance, and on joint, the speed of shackle can improve 100%.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the structural representation of double thread design in the utility model embodiment.
Fig. 3 is the sectional view of box cupling in the utility model embodiment.
The specific embodiment
Referring to Fig. 1～Fig. 3, screwed connection of unloading on fast of the present utility model comprises body 2 and the box cupling 1 of outer screw-internal thread fit; The form of thread form of structure of described body 2 external screw threads and box cupling 1 screw-internal thread fit is double end buttress thread structure, between screw thread tooth top, tooth base cone degree and bus angle τ become 1: 12～between 1: 16, screw thread carrying angle [alpha]-5 °～3 °, 10 °～50 ° of screw thread guiding angle betas; Screw thread facewidth t is 0.1 inch, and lead P is 2.5 tooth/inch, i.e. 10.16mm; Increase Q hole design in box cupling (joint female end) port.
With Φ 244.45mm * 11.99mm P110 sleeve pipe, by contrasting common partially trapezoidal (BTC) and the utility model joint:
* going up the button time refers to detain time value on single head under identical speed (7r/min) condition.
Can find out by embodiment, under similarity condition, the present embodiment can under the constant performance of bonding strength, double make-up speed.
The utility model satisfies the user to the demand of quick make-up, upper button in the situation that the entity performance does not reduce, and is conducive to the user and reduces sleeve pipe and go into the well the time, reduces the sleeve pipe operating cost of going into the well, and improves the operating efficiency of well operations under sleeve pipe.Therefore the utility model casing joint has good application prospect.
Claims (1)
1. screwed connection of unloading on fast comprises body and the box cupling of outer screw-internal thread fit; It is characterized in that,
Increase Q hole design in described box cupling port, the inner diameter values Q in box cupling D outer diameter, Q hole and the corresponding relation of length value q are:
The form of thread form of structure that described body external screw thread coordinates with coupling inner thread is double end buttress thread structure, between screw thread tooth top, tooth base cone degree and bus angle τ become 1: 12～1: 16, screw thread carrying angle [alpha]-5 °～3 °, 10 °～50 ° of screw thread guiding angle betas; Screw thread facewidth t is 0.1 inch, and lead P is 2.5 tooth/inch, i.e. 10.16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220638301 CN202954751U (en) | 2012-11-28 | 2012-11-28 | Thread casing pipe connector capable of being quickly screwed on and screwed off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220638301 CN202954751U (en) | 2012-11-28 | 2012-11-28 | Thread casing pipe connector capable of being quickly screwed on and screwed off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202954751U true CN202954751U (en) | 2013-05-29 |
Family
ID=48460328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220638301 Expired - Lifetime CN202954751U (en) | 2012-11-28 | 2012-11-28 | Thread casing pipe connector capable of being quickly screwed on and screwed off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202954751U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762425A (en) * | 2017-10-30 | 2018-03-06 | 中国石油天然气集团公司 | A kind of oil pipe thread attachment structure |
| CN109372444A (en) * | 2018-12-19 | 2019-02-22 | 中国石油大学(北京) | Double lead petroleum casing screws bindiny mechanism and its casing tubing string |
| CN109505529A (en) * | 2018-12-19 | 2019-03-22 | 中国石油大学(北京) | Four lead petroleum casing screw bindiny mechanisms and its casing tubing string |
| CN114320189A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Screwing control method of threaded pipe joint |
| CN114320175A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Thread joint is buckled on gluing fast of preventing detaining |
-
2012
- 2012-11-28 CN CN 201220638301 patent/CN202954751U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762425A (en) * | 2017-10-30 | 2018-03-06 | 中国石油天然气集团公司 | A kind of oil pipe thread attachment structure |
| CN107762425B (en) * | 2017-10-30 | 2019-09-03 | 中国石油天然气集团公司 | A kind of oil pipe thread connection structure |
| CN109372444A (en) * | 2018-12-19 | 2019-02-22 | 中国石油大学(北京) | Double lead petroleum casing screws bindiny mechanism and its casing tubing string |
| CN109505529A (en) * | 2018-12-19 | 2019-03-22 | 中国石油大学(北京) | Four lead petroleum casing screw bindiny mechanisms and its casing tubing string |
| CN114320189A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Screwing control method of threaded pipe joint |
| CN114320175A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Thread joint is buckled on gluing fast of preventing detaining |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130529 |