CN105604498A - External thickened oil pipe - Google Patents
External thickened oil pipe Download PDFInfo
- Publication number
- CN105604498A CN105604498A CN201610199420.6A CN201610199420A CN105604498A CN 105604498 A CN105604498 A CN 105604498A CN 201610199420 A CN201610199420 A CN 201610199420A CN 105604498 A CN105604498 A CN 105604498A
- Authority
- CN
- China
- Prior art keywords
- oil pipe
- pipe body
- external
- thread
- api standard
- 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
- 238000007789 sealing Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000003129 oil well Substances 0.000 description 6
- 230000008439 repair process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 235000013547 stew Nutrition 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention relates to an oil pipe and particularly relates to an external thickened oil pipe. The external thickened oil pipe comprises an oil pipe body, wherein an API standard outer thread is arranged at one end of the oil pipe body; the other end of the oil pipe body is connected with a variable fastening hoop through a trapezoid-biased conical thread structure; and an API standard inner thread matched with the API standard outer thread is arranged at the other end of the variable fastening hoop. With the adoption of the external thickened oil pipe provided by the invention, a pipe body manufacturing process can be simplified and the manufacturing cost is reduced; the requirements on frequent cutting end repairing of thread losses, caused by the fact that an oil pipe is frequently arranged and detached in a use process, are met; the external thickened oil pipe can be used as a construction oil pipe which is frequently arranged and detached and also can be used for repairing an API standard external thickened oil pipe with thread losses; and the thread repairing cost is reduced and the service life of the oil pipe can be remarkably prolonged; and the external thickened oil pipe has a wide application range and can be produced, manufactured and used in a large scale.
Description
Technical field
The present invention relates to oil pipe, specifically a kind of external upset tubing.
Background technology
Oil pipe is as well recovery passage, that necessary valuable cargo is produced in oil field development, used in a large number at each oil gas field, at present field use the most widely oil pipe be two kinds of plain end oil well pipe and external upset tubings, two kinds of oil pipes all adopt API oil pipe round thread, wherein external upset tubing, its body two ends thicken through jumping-up, reprocess out coarse thread round thread, therefore, compare plain end oil well pipe screw thread, its screw thread tensile strength higher (approaching body tensile strength), the scope of application is wider, be applicable to darker oil well, along with improving constantly of petrol resources exploitation degree, oil well bores darker and darker, the consumption of external upset tubing is also increasing.
Oil well need to regularly be examined pump and measure operation, the every operation of oil well once, oil pipe column all needs to unload once, it is limited on tubing round thread allowable, unloading number of times, under high pulling torque, tubing round thread easily damages, therefore, each oil field all can produce large dipping tube every year needs maintenance, wherein screw thread reparation is important overhauling project, the traditional method of screw thread reparation is that damaged screw is cut away, the new screw thread of recycling lathe in machining, after external upset (EU) die head, its thick section has not existed, generally can only change flat screw thread into, this method causes tubing round thread tensile strength significantly to reduce, limit its range of application, another kind of repair mode is the thick and heat treatment of Stew again after the reinforcement of damage is cut away, reprocessing external upset (EU) round thread, but the method has not only increased maintenance difficulty, and maintenance cost is increased considerably.
Summary of the invention
The present invention is intended to address the above problem, thereby a kind of external upset tubing that can reduce screw thread rehabilitation cost, increase the service life is provided.
The present invention solves described problem, and the technical scheme of employing is:
A kind of external upset tubing, comprise oil pipe body, oil pipe body one end is provided with API standard external, and the oil pipe body other end is connected with variable buckle box cupling by partially trapezoidal tapered tread structure, and the variable buckle box cupling other end is provided with the API standard female coordinating with API standard external.
Adopt the present invention of technique scheme, compared with prior art, its outstanding feature is:
1. change the structure thicker at the external upset tubing two ends that meet API standard into one end structure thicker, can simplify tube manufacturing process, reduced manufacturing cost.
2. oil pipe body is installed variable buckle box cupling by partially trapezoidal tapered tread structure, by external upset end jumping-up to long enough, meeting oil pipe unloads the screw thread causing on frequent in using and damages repeatedly crop and repair needs, be well suited for as the construction oil pipe unloading on frequent, and the API standard external upset tubing that is applicable to double thread damage is repaired, reduced screw thread rehabilitation cost, can significant prolongation its service life.
3. the scope of application is wide, can manufacture in a large number use.
As preferably, the present invention further technical scheme is:
The partially trapezoidal tapered tread end of oil pipe body is provided with sealing surface, forms shape metallic leak-proof structure with variable buckle box cupling.
Concrete, the oil pipe body sealing surface of the partially trapezoidal circular cone external screw thread end of oil pipe body is the sealing surface that a circle raises up, on variable buckle box cupling, be processed with the variable buckle box cupling sealing surface adapting with oil pipe body sealing surface, oil pipe body sealing surface and variable buckle box cupling sealing surface form shape metallic leak-proof structure, make oil pipe reach zero leakage state with being threaded of variable buckle box cupling.
Brief description of the drawings
Fig. 1 is embodiment of the present invention structural representation;
Fig. 2 is A portion enlarged drawing in Fig. 1;
In figure: variable buckle box cupling 1; API standard female 2; Partially trapezoidal circular cone external screw thread 3; Partially trapezoidal conical inner screw thread 4; Oil pipe body 5; API standard external 6; Oil pipe body sealing surface 7; Variable buckle box cupling sealing surface 8.
Detailed description of the invention:
Below in conjunction with embodiment, the invention will be further described, and object is only to understand better content of the present invention, and therefore, the cited case does not limit the scope of the invention.
Referring to Fig. 1, Fig. 2, on the external cylindrical surface of oil pipe body 5 one end, be processed with partially trapezoidal circular cone external screw thread 3, oil pipe body 5 other end jumping-ups go out the external cylindrical surface of certain length, and be processed with API standard external 6, adopt one section of thick-walled seamless steel pipes that size and mechanical performance meet the demands to make variable buckle box cupling 1, one end endoporus of variable buckle box cupling 1 is processed with the partially trapezoidal conical inner screw thread 4 coordinating with the partially trapezoidal circular cone external screw thread 3 in oil pipe body 5 one end, variable buckle box cupling 1 other end endoporus is processed with the API standard female 2 coordinating with oil pipe body 5 other end API standard external 6, partially trapezoidal conical inner screw thread 4 one end of variable buckle box cupling 1 moment of torsion is in accordance with regulations tightened on partially trapezoidal circular cone external screw thread 3 one end of oil pipe body 5, partially trapezoidal circular cone external screw thread 3 ends of oil pipe body 5 are processed with the oil pipe body sealing surface 7 that a circle raises up, on variable buckle box cupling 1, be processed with the variable buckle box cupling sealing surface 8 adapting with oil pipe body sealing surface 7, oil pipe body sealing surface 7 forms shape metallic leak-proof structure with variable buckle box cupling sealing surface 8, make oil pipe body 5 reach zero leakage state with being threaded of variable buckle box cupling 1.
The API standard external upset tubing restorative procedure that external screw thread damages: the external screw thread that oil pipe body 5 is damaged cuts away, process partially trapezoidal circular cone external screw thread 3, and twist and connect with variable buckle box cupling 1, then the old box cupling of oil pipe body 5 other ends is screwed down (the API standard external 6 of this end is intact), so just complete reparation, partially trapezoidal tapered tread structural design, its tensile strength can approach body intensity, be equivalent to the tensile strength of original external upset (EU) round thread, therefore this repair mode is equal strength renovation technique.
The general API standard external upset tubing difference of the present invention and our times is: the body two ends of existing API standard external upset tubing are all through jumping-up and be processed with API standard circular cone round thread, and the present invention is only by one end jumping-up thickening of body, and process API standard circular cone round thread, the body other end is not thickeied and on the external diameter of pipe end, is processed partially trapezoidal tapered tread, connecting thread of the present invention and API standard oil pipe have absolute interchangeability, and on-the-spot use is very convenient.
The present invention has two significant advantages: the one, change the structure thicker at the external upset tubing two ends that meet API standard into one end structure thicker, and can simplify tube manufacturing process, reduce manufacturing cost; The 2nd, oil pipe body is installed variable buckle box cupling by partially trapezoidal tapered tread structure, by external upset end jumping-up to long enough, meeting oil pipe unloads the screw thread causing on frequent in using and damages repeatedly crop and repair needs, be well suited for as the construction oil pipe unloading on frequent, and the API standard external upset tubing that is applicable to double thread damage is repaired, reduced screw thread rehabilitation cost, can significant prolongation its service life.
The foregoing is only the better feasible embodiment of the present invention, not thereby limit to interest field of the present invention, the equivalence that all utilizations description of the present invention and accompanying drawing content thereof are done changes, within being all contained in interest field of the present invention.
Claims (3)
1. an external upset tubing, comprise oil pipe body, oil pipe body one end is provided with API standard external, it is characterized in that: the oil pipe body other end is connected with variable buckle box cupling by partially trapezoidal tapered tread structure, and the variable buckle box cupling other end is provided with the API standard female coordinating with API standard external.
2. external upset tubing according to claim 1, is characterized in that: the partially trapezoidal tapered tread end of oil pipe body is provided with sealing surface, forms shape metallic leak-proof structure with variable buckle box cupling.
3. external upset tubing according to claim 2, it is characterized in that: the oil pipe body sealing surface of the partially trapezoidal circular cone external screw thread end of oil pipe body is the sealing surface that a circle raises up, on variable buckle box cupling, be processed with the variable buckle box cupling sealing surface adapting with oil pipe body sealing surface, oil pipe body sealing surface and variable buckle box cupling sealing surface form shape metallic leak-proof structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610199420.6A CN105604498A (en) | 2016-04-03 | 2016-04-03 | External thickened oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610199420.6A CN105604498A (en) | 2016-04-03 | 2016-04-03 | External thickened oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105604498A true CN105604498A (en) | 2016-05-25 |
Family
ID=55984784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610199420.6A Pending CN105604498A (en) | 2016-04-03 | 2016-04-03 | External thickened oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105604498A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908363A (en) * | 2005-08-04 | 2007-02-07 | 孟祥湖 | Oil pipe and sleeve |
| FR2925946A1 (en) * | 2007-12-28 | 2009-07-03 | Vallourec Mannesmann Oil & Gas | TUBULAR THREADED SEAL AND RESISTANT TO SUCCESSIVE PRESSURE SOLICITATIONS |
| CN201943592U (en) * | 2010-11-19 | 2011-08-24 | 孟祥湖 | Novel external thickening oil pipe and sleeve |
| CN202913974U (en) * | 2012-12-06 | 2013-05-01 | 唐山冀东石油机械有限责任公司 | Oil pipe for oil and gas wells |
| CN205477404U (en) * | 2016-04-03 | 2016-08-17 | 唐山冀东石油机械有限责任公司 | External upset tubing |
-
2016
- 2016-04-03 CN CN201610199420.6A patent/CN105604498A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908363A (en) * | 2005-08-04 | 2007-02-07 | 孟祥湖 | Oil pipe and sleeve |
| FR2925946A1 (en) * | 2007-12-28 | 2009-07-03 | Vallourec Mannesmann Oil & Gas | TUBULAR THREADED SEAL AND RESISTANT TO SUCCESSIVE PRESSURE SOLICITATIONS |
| CN201943592U (en) * | 2010-11-19 | 2011-08-24 | 孟祥湖 | Novel external thickening oil pipe and sleeve |
| CN202913974U (en) * | 2012-12-06 | 2013-05-01 | 唐山冀东石油机械有限责任公司 | Oil pipe for oil and gas wells |
| CN205477404U (en) * | 2016-04-03 | 2016-08-17 | 唐山冀东石油机械有限责任公司 | External upset tubing |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160525 |
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| RJ01 | Rejection of invention patent application after publication |