CN106522855A - Metal elastic double-airtight-sealing special-threading oil pipe - Google Patents
Metal elastic double-airtight-sealing special-threading oil pipe Download PDFInfo
- Publication number
- CN106522855A CN106522855A CN201611250347.7A CN201611250347A CN106522855A CN 106522855 A CN106522855 A CN 106522855A CN 201611250347 A CN201611250347 A CN 201611250347A CN 106522855 A CN106522855 A CN 106522855A
- Authority
- CN
- China
- Prior art keywords
- oil pipe
- pipe body
- sealing surface
- seals face
- spherical seals
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
Abstract
The invention discloses a metal elastic double-airtight-sealing special-threading oil pipe. An external thread is arranged at one end of an oil pipe body, and a welding groove is formed in the other end of the oil pipe body. The end, provided with the external thread, of the oil pipe body is further provided with a pipe body spherical sealing surface, and the distance L1 between the pipe body spherical sealing surface and the sharp point of a pipe body end torque shoulder ranges from 29.00 mm to 29.10 mm. The pipe body spherical sealing surface and a coupling spherical sealing surface 9 used in cooperation with the pipe body spherical sealing surface are used in a matched mode. The distance L2 between the coupling spherical sealing surface and the sharp point of a coupling end torque shoulder ranges from 28.90 mm to 29.00 mm, and the value obtained by subtracting L2 from L1 is smaller than or equal to 0.05 mm. Elastic sealing can be achieved in a larger angle range due to spherical sealing, a spherical sealing structure can offset external torque in multiple directions including the axial direction and the radial direction, the effect of overload torque resisting can be achieved, and meanwhile the simple structure can be applied and popularized industrially.
Description
Technical field
The invention belongs to oil exploitation drilling equipment technical field, is related to the tubing round thread interconnection technique of drilling equipment, it is special
It is not related to a kind of dual hermetic seal special buckle oil pipe of metallic elastic.
Background technology
With the development and the progress of science and technology of social economy, people are more and more stronger to the dependency of petroleum-based energy.This
Promote the exploitation of underground deep layer petroleum resources, tubing and casing is indispensable special tubing during oil gas drilling, its
Quality directly influences the success or failure of drilling operation and the life-span of Oil/gas Well.And nipple with oil casing together in oil gas
Bear the test of the combined stresses of generation such as stretching, compression, bending, intrinsic pressure, external pressure and temperature in well for a long time, it is most thin in tubing and casing
Weak part is exactly threaded connection place, and the quality of thread quality directly affects the life-span of Oil/gas Well.Jing is investigated, external tubing and casing
Failure accidents about 64% occur in threaded connection place, it is domestic then be up to 86%.
The oil bushing threaded connector of API standard is the most frequently used oil sleeve joint of China, and each tubing and casing production of China
The leading products of factory, this product technology are ripe, it is easy to process.But, it is solid that the oil sleeve joint still suffers from some in structure
Some defects, such as seal that unreliable, resistance to torsion is low and the easy thread gluing of screw thread etc., limit the use of API tubing and casings.
In the evolution of petroleum industry, with casinghead gas drilling operation to bigger well depth, higher pressure and temperature, more
The direction of harsh working condition is developed and the oil drilling technology technology progress of itself, the conventional API standard of oil pipes
Nipple is difficult to meet the exploitation requirement in oil field.Although API round threads have the excellent sealing property of comparison, its threaded portion
The bonding strength for dividing but is only equivalent to the 60%～80% of body portion, and API buttress threads are although threaded portion connection is strong
Degree is higher, but sealing property is undesirable.So, each big oil pipes maker in the world is devoted to develop bonding strength and close
The more superior special screw-threaded oil well pipes of sealing property.
With year by year reduction of the world to the drastically soaring and oil allowable exploitation of fossil energy demand, current oil exploitation
The direction of extraction of field forward direction deep-well, ultradeep well, high-pressure oil-gas well, thick oil thermal extraction, directional well etc. progressively develops, thus to stone
Sealing between oil pipe and pipe proposes increasingly harsher technical requirements.API (American Petroleum Institute (API)) marks for using in a large number in the past
Director circle screw thread and buttress thread joint are unable to meet mining environment bar in terms of gas tightness, bonding strength and resistance to torsion
The demand of the severe Oil/gas Well of part.People are forced to go to research and develop the relatively reliable special thread oil pipe of performance.
The content of the invention
It is an object of the invention to provide a kind of dual hermetic seal special buckle oil pipe of metallic elastic, screw thread and junction is improved
Structure, improves sealing and torsional property so as to more adapt to the oil gas hole condition of harsh environmental conditions.
For realizing the purpose of the present invention, the invention provides a kind of dual hermetic seal special buckle oil pipe of metallic elastic, which is special
Levy and be, described 1 one end of oil pipe body arranges external screw thread 2, the other end arranges bevel for welding, is provided with the oil pipe body 1
2 one end of external screw thread, is additionally provided with the cusp in body Spherical Seals face 3, the body Spherical Seals face 3 and tube end torque shoulder 5
Apart from L1=29.00mm-29.10mm, the body Spherical Seals face 3 with and its box cupling Spherical Seals face 9 for being used in combination
It is used in combination, the cusp of the box cupling Spherical Seals face 9 and coupling end torque shoulder 10 is apart from L2=28.90mm-
29.00mm, and L1-L2≤0.05mm.
Wherein, the circular arc r=11.50mm-12.00mm in the body Spherical Seals face, the box cupling Spherical Seals face circle
Arc R=12.00mm-12.50mm, and R-r >=0.20mm.
Wherein, body Spherical Seals face is coordinated with Elastic Circular arc formula metal interference is combined into box cupling Spherical Seals face, and mistake
The amount of being full of=0.02-0.20mm.
Compared with prior art, beneficial effects of the present invention are, the ball face sealing compared with the simple conical surface seal of prior art
Can be to realize elastic packing in the range of greater angle, ball face sealing structure can offset external torsion on axial direction, radial direction are multi-direction
Square, can function well as overload-resistant moment of torsion effect, while easy structure is also in industrially promotion and application.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of body male end of the present invention.
Fig. 3 is the structural representation at coupling inner thread end of the present invention.
Fig. 4 is the enlarged diagram of helicitic texture of the present invention.
In figure, 1- oil pipe bodys, 2- external screw threads, 3- body Spherical Seals face, 4- body conical surface seals face, 5- tube ends are turned round
Square shoulder, 6- box cuplings, 7- female threads, 8- box cupling stress relief grooves, 9- box cupling Spherical Seals face, 10- box cupling conical surface seals face,
11- coupling end torque shoulders, Q- carry face angle, and D- is oriented to face angle, bore hole cone angle in C-, P- pitch, G- height of threads, body ball
Type sealing surface circular arc r, box cupling Spherical Seals face circular arc R.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment only to explain the present invention, be not intended to limit the present invention.
It should be noted that " connection " described herein and the word for expressing " connection ", such as " being connected ",
" being connected " etc., both it was directly connected to another part including a certain part, also passed through miscellaneous part and another portion including a certain part
Part is connected.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
Be also intended to include plural form, additionally, it should be understood that, when in this manual using belong to "comprising" and/or " bag
Include " when, which indicates existing characteristics, step, operation, part or module, component and/or combinations thereof.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combine.
As Figure 1-Figure 4, this application provides a kind of dual hermetic seal special buckle oil pipe of metallic elastic, the oil pipe pipe
1 one end of body arranges external screw thread 2, and the other end arranges bevel for welding, is provided with 2 one end of external screw thread, is additionally provided with the oil pipe body 1
The cusp of body Spherical Seals face 3, the body Spherical Seals face 3 and tube end torque shoulder 5 is apart from L1=29.00mm-
29.10mm, the body Spherical Seals face 3 with and its box cupling Spherical Seals face 9 being used in combination be used in combination, it is described to connect
The cusp of hoop Spherical Seals face 9 and coupling end torque shoulder 10 is apart from L2=28.90mm-29.00mm, and L1-L2≤0.05mm.
Wherein, the circular arc r=11.50mm-12.00mm in the body Spherical Seals face 3, the box cupling Spherical Seals face 9
Circular arc R=12.00mm-12.50mm, and R-r >=0.20mm.
Wherein, body Spherical Seals face 3 is coordinated with Elastic Circular arc formula metal interference is combined into box cupling Spherical Seals face 9, and
The magnitude of interference=0.02-0.20mm.
Other above-mentioned structure, can be combined application with description scheme, can play a multiplier effect.
The oil pipe body is provided with tube end torque shoulder 5 on the outside of 1 upper tube body Spherical Seals face 3；What box cupling 6 was provided with connects
Box cupling stress relief grooves 8, box cupling Spherical Seals face 9, box cupling conical surface seal face 10, coupling end are sequentially provided with the inside of hoop female thread 7
Torque shoulder 11.
In the application, external screw thread 2 and female thread 6 adopt new partially trapezoidal tapered tread, its pitch P be set as 6-8 teeth/
In, thread crest is parallel to tubing bus；
In the application, the carrying face angle (Q) of the partially trapezoidal tapered tread sets the clockwise direction angle with vertical
Between 3 °～3.5 °, it is oriented to face angle (D) and is set between 10 ° -12 °, interior bore hole cone angle (C) is set between 5 ° -10 °, spiral shell
The high G of stricture of vagina tooth is 1.7mm～1.8mm；
In the application, 1 nominal outside diameter 60.32mm of oil pipe body～73.03mm.
The above is only the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, some improvements and modifications, these improvements and modifications can also be made
Also should be regarded as protection scope of the present invention.
Claims (3)
1. the dual hermetic seal special buckle oil pipe of a kind of metallic elastic, it is characterised in that oil pipe body (1) one end arranges outer spiral shell
Stricture of vagina (2), the other end arrange bevel for welding, be provided with external screw thread (2) one end, be additionally provided with body ball-type on oil pipe body (1)
The cusp of sealing surface (3), body Spherical Seals face (3) and tube end torque shoulder (5) is apart from L1=29.00mm-
29.10mm, body Spherical Seals face (3) with and its box cupling Spherical Seals face (9) being used in combination be used in combination, institute
The cusp that box cupling Spherical Seals face (9) is stated with coupling end torque shoulder (10) is apart from L2=28.90mm-29.00mm, and L1-L2
≤0.05mm。
2. a kind of dual hermetic seal special buckle oil pipe of metallic elastic according to claim 1, it is characterised in that the body
The circular arc r=11.50mm-12.00mm in Spherical Seals face (3), box cupling Spherical Seals face (9) circular arc R=12.00mm-
12.50mm, and R-r >=0.20mm.
3. a kind of dual hermetic seal special buckle oil pipe of metallic elastic according to claim 1, it is characterised in that body ball-type
Sealing surface (3) is coordinated with Elastic Circular arc formula metal interference is combined into box cupling Spherical Seals face (9), and the magnitude of interference=0.02-
0.20mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611250347.7A CN106522855A (en) | 2016-12-29 | 2016-12-29 | Metal elastic double-airtight-sealing special-threading oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611250347.7A CN106522855A (en) | 2016-12-29 | 2016-12-29 | Metal elastic double-airtight-sealing special-threading oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106522855A true CN106522855A (en) | 2017-03-22 |
Family
ID=58335484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611250347.7A Pending CN106522855A (en) | 2016-12-29 | 2016-12-29 | Metal elastic double-airtight-sealing special-threading oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106522855A (en) |
-
2016
- 2016-12-29 CN CN201611250347.7A patent/CN106522855A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170322 |