CN101871325A - Operation tubing threaded connection structure - Google Patents
Operation tubing threaded connection structure Download PDFInfo
- Publication number
- CN101871325A CN101871325A CN 201010222335 CN201010222335A CN101871325A CN 101871325 A CN101871325 A CN 101871325A CN 201010222335 CN201010222335 CN 201010222335 CN 201010222335 A CN201010222335 A CN 201010222335A CN 101871325 A CN101871325 A CN 101871325A
- Authority
- CN
- China
- Prior art keywords
- thread
- oil pipe
- connection structure
- threaded 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.)
- Pending
Links
Images
Landscapes
- Earth Drilling (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention provides an operation tubing threaded connection structure. The structure is a direct connection type threaded joint, and comprises a tubing of which the tube end is headed and provided with external threads, and a tubing of which the tube end is headed and provided with internal threads, which are screwed. The external threads and the internal threads of the tubings are trapezoid taper threads; a main sealing structure consisting of straight torque shoulders is arranged on the internal threads and the external threads respectively; and the axial interference between the internal threads and the external threads is 2.5 to 10mm. The operation tubing threaded connection structure has the advantages that: by heading the tube ends of the tubings and increasing the length of complete threads, the connecting intensity of a fastening tubing connection structure is improved to 100 percent of the tube intensity. Therefore, local contact stress of the operation tubing in the process of screwing and unscrewing for multiple times is relatively low, a thread gluing phenomenon does not occur, and the looseness resistance of the joint is improved. The operation tubing threaded connection structure has the thread gluing resistance and looseness resistance during screwing and unscrewing for ten or more times, is used for testing, acidification, drilling, borehole operation, production string well completion work of ultra-deep, ultra-high pressure, and high-temperature oil and gas wells, and is used as a small drill stem under special conditions.
Description
Technical field
The present invention relates to a kind of operation tubing threaded connection structure.
Background technology
The oil pipe tubing string adopts screw thread that single oil well pipe is formed by connecting, and the screw connection point of tubing string is weak key link.In general API standard, the type of attachment that oil pipe adopts the round thread external upset (EU) or do not thicken.These types of attachment are guaranteeing all there is certain problem aspect tubular column structure integrality and the sealing integrity.For example, do not thicken the round thread oil pipe, its intensity that is threaded only is 60%～80% of body intensity, and the hydrogen sulfide acid ingredient that contains in the oil gas in addition can make common API oil pipe that stress corrosion slowly takes place, and causes oil pipe deformation failure in long-term use.
Along with the development of petroleum industry, especially the exploitation of deep-well, ultradeep well, high-pressure gas well, directional well, sour environment well is had higher requirement to the functional performance of petroleum oil.Oil pipe and conventional special button the with API standard thread type of attachment are difficult to satisfy the production demand in many cases.Especially some oil field block corrosive environment is abominable, uses the conventional oil pipe in back to stand through acidifying repeatedly with as drilling rod, and the torque resistant ability of present oil pipe button-type and loosing prevention (vibration) ability etc. can not satisfy the oil field instructions for use.Thereby need a kind of new assignment oil pipe button-type of design, be used for test, acidifying, pressure break, underground work, the flow string well completion work of super dark, super-pressure and high temperature oil gas well and use as macaroni under special circumstances.
Summary of the invention
At structural deficiency in the prior art, the purpose of this invention is to provide the special snapping head of a kind of oil pipe, be beneficial to improve the plain tubing joint and resisted the ability of turning round not good, can't be applicable to bigger vibration and cross the hole condition of turning round.
For achieving the above object, the technical solution used in the present invention provides a kind of operation tubing threaded connection structure, wherein: this structure is a kind of direct linkage type nipple, includes a tube end pier and has oil pipe that externally threaded oil pipe and pipe end pier slightly have internal thread after thick and be screwed and form; The external screw thread of described oil pipe and internal thread are the trapezoidal tapers screw thread, are equipped with the primary seal structure that straight torque shoulder constitutes on the described internal and external screw thread, and the axial magnitude of interference of internal and external screw thread is 2.5～10mm.
The external diameter of the oil pipe pipe end after described pier is thick is greater than this oil pipe external diameter 4～15mm, and the transition arc radius of thick part of pier and oil pipe pipe parts is 20～50mm.
The male end run-out(of thread) of described trapezoidal tapers thread tooth type is provided with straight mouthful of withdrawing district of the long cylinder of 2～10mm, the pitch of trapezoidal tapers thread tooth type is per inch five teeth or per inch six teeth, male end screw thread tooth depth is 1.27～1.575mm, female end screw thread tooth depth is 1.32～1.778mm, and tapering is 1: 16.
Be provided with the torque shoulder of shackle location at the two ends of described male and female end reach, male end screw thread withdrawing place is outer torque shoulder, and box thread withdrawing place is the internal torque shoulder.
The angle of the described inside and outside torque shoulder and the axis of thread is 70～90 degree.
Effect of the present invention is that this structure is thick by oil pipe pipe end pier, increase the length of complete thread, this button-type oil tube connection structure bonding strength is improved, can reach 100% of body intensity, follow-on pitch and tooth depth design more can be fit to the thick spacious characteristics of well operations down of oil pipe, the design of the less screw thread magnitude of interference has guaranteed that this operation tubing in that repeatedly to go up in the shackle process local contact stress not too large, the thread gluing phenomenon can not take place.Thicker torque shoulder can guarantee not to be damaged in the situation lower contact of turning round excessively, improves the loosing prevention ability of joint.The concordant design of male and female end endoporus makes oil gas turbulent phenomenon can not take place in transport process, reduces transport resistance.This structure has more than 10 times the not thread gluing of shackle of going up and loosing prevention ability, is used for the test, acidifying, probing, underground work, flow string well completion work of super dark, super-pressure and high temperature oil gas well and uses as macaroni in special circumstances.
Description of drawings
Fig. 1 is the schematic diagram of oil tube connection structure of the present invention;
Fig. 2 is the tooth form structure of oil pipe trapezoidal thread of the present invention.
A, oil pipe male end B, oil pipe female end C, external screw thread D, internal torque shoulder E, outer torque shoulder
α-trapezoidal thread bearing surface angle beta-trapezoidal thread approaching face angle h-trapezoidal thread height
The specific embodiment
Reaching embodiment in conjunction with the accompanying drawings is illustrated operation tubing threaded connection structure of the present invention.
Operation tubing threaded connection structure of the present invention, this structure include a tube end pier and have oil pipe that externally threaded oil pipe and pipe end pier slightly have internal thread after thick and be screwed and form; The external screw thread of described oil pipe and internal thread are the trapezoidal tapers screw thread, are equipped with the primary seal structure that straight torque shoulder constitutes on the described internal and external screw thread, and thread spindle is 2.5～10mm to the magnitude of interference.The external diameter of the oil pipe pipe end after described pier is thick is greater than this oil pipe external diameter 4～15mm, and the transition arc radius of thick part of pier and oil pipe pipe parts is 20～50mm.
The male end run-out(of thread) of described trapezoidal tapers thread tooth type is provided with straight mouthful of withdrawing district of the long cylinder of 2～10mm, the pitch of trapezoidal tapers thread tooth type is per inch five teeth or per inch six teeth, male end screw thread tooth depth is 1.27～1.575mm, female end screw thread tooth depth is 1.32～1.778mm, and tapering is 1: 16.Be provided with the torque shoulder of shackle location at the two ends of described male and female end reach, male end screw thread withdrawing place is outer torque shoulder, and box thread withdrawing place is the internal torque shoulder, and the angle of the described inside and outside torque shoulder and the axis of thread is 70～90 degree.
As shown in Figure 1, this operation tubing threaded connection structure comprises oil pipe male end A and oil pipe female end B two parts composition, is that direct linkage type connects.Described oil pipe end pier is thick, and oil pipe male end A processes in the thick part of pipe end pier, is made up of trapezoidal external screw thread C and the interior torque shoulder D that ends; Oil pipe female end B processing is made up of trapezoidal internal thread and the outer torque shoulder E that ends in the thick part of pipe end pier.
The tooth form structure of oil pipe trapezoidal thread as shown in Figure 2, described trapezoidal thread approaching face β be 10～45 the degree, bearing surface α be 0～5 the degree, difference according to the external diameter specification, male end screw thread tooth depth h is 1.27～1.575mm, and pitch is respectively t=4.233 or 5.08mm, thread taper 1: 16.The tooth form angle of described ladder type internal thread, approaching face angle, bearing surface angle, pitch, tapering are all consistent with external screw thread, and tooth depth h correspondence is respectively 1.32～1.778mm.
Oil pipe male end and oil pipe female end have all been twisted protective cap before dispatching from the factory, and are transported to the oil field, and the female end of the male end of an oil pipe and another root oil pipe is twisted to tap into to go and gone into the well in the time of need going into the well, and forms airtight tubing string until the dark oil recovery gas-bearing formation of several kms.Connect in the button process stubborn, oil pipe male end A and oil pipe female end B are screwed, the trapezoidal external screw thread C of oil pipe male end and the trapezoidal internal thread on the female end screw and are combined together, until beginning to take place interference, produce certain contact stress, end torque shoulder when contact when oil pipe male end A and oil pipe female end B inside and outside at last, screw moment of torsion and stop automatically screwing when fast rise arrives the torque value of design immediately, for the stubborn accurately location that connects is provided between oil pipe male end A and the oil pipe female end B.And since the thickness of torque shoulder after, so it is very strong to cross torque capability.Cross torque capability and can reach more than 2.5 times of best torque.This moment, oil pipe male end A and oil pipe female end B can guarantee that bonding strength surpasses body intensity, and under periodic vibration load, joint is difficult for loosening, and twisted easily and receive the position, reduced the activity duration.
Claims (5)
1. operation tubing threaded connection structure, it is characterized in that: this structure is a kind of direct linkage type nipple, includes a tube end pier and has oil pipe that externally threaded oil pipe and pipe end pier slightly have internal thread after thick and be screwed and form; The external screw thread of described oil pipe and internal thread are the trapezoidal tapers screw thread, are equipped with the primary seal structure that straight torque shoulder constitutes on the described internal and external screw thread, and the axial magnitude of interference of internal and external screw thread is 2.5～10mm.
2. operation tubing threaded connection structure according to claim 1 is characterized in that: the external diameter of the oil pipe tube end after described pier is thick is greater than this oil pipe external diameter 4～15mm, and the transition arc radius of thick part of pier and oil pipe pipe parts is 20～50mm.
3. operation tubing threaded connection structure according to claim 1, it is characterized in that: the male end run-out(of thread) of described trapezoidal tapers thread tooth type is provided with straight mouthful of withdrawing district of the long cylinder of 2～10mm, the pitch of trapezoidal tapers thread tooth type is per inch five teeth or per inch six teeth, male end screw thread tooth depth is 1.27～1.575mm, female end screw thread tooth depth is 1.32～1.778mm, and tapering is 1: 16.
4. operation tubing threaded connection structure according to claim 3 is characterized in that: be provided with the torque shoulder of shackle location at the two ends of described male and female end reach, male end screw thread withdrawing place is outer torque shoulder, and box thread withdrawing place is the internal torque shoulder.
5. operation tubing threaded connection structure according to claim 4 is characterized in that: the angle of the described inside and outside torque shoulder and the axis of thread is 70～90 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010222335 CN101871325A (en) | 2010-07-09 | 2010-07-09 | Operation tubing threaded connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010222335 CN101871325A (en) | 2010-07-09 | 2010-07-09 | Operation tubing threaded connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101871325A true CN101871325A (en) | 2010-10-27 |
Family
ID=42996393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010222335 Pending CN101871325A (en) | 2010-07-09 | 2010-07-09 | Operation tubing threaded connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101871325A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653123A (en) * | 2015-02-05 | 2015-05-27 | 江苏常宝钢管股份有限公司 | Coupling-free direct connecting spinning joint oil pipe |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3870351A (en) * | 1972-03-31 | 1975-03-11 | Sumitomo Metal Ind | Threaded tube joint structure for casing, particularly oil well tubing |
| US5133576A (en) * | 1991-02-28 | 1992-07-28 | Barnhill W J | Carbide coated blast tube construction for use in oil and gas well completion across perforations |
| CN2793296Y (en) * | 2005-05-16 | 2006-07-05 | 江苏曙光集团有限公司 | Welded and accentuated drilling rod |
| CN201013253Y (en) * | 2007-01-31 | 2008-01-30 | 中国石油天然气股份有限公司 | High-strength working pipe for oil test operation |
| CN201254959Y (en) * | 2008-07-17 | 2009-06-10 | 华东理工大学 | Oil pipe joint for moderating stress concentration work |
| CN201318513Y (en) * | 2008-11-22 | 2009-09-30 | 衡阳华菱连轧管有限公司 | Oil pipe high-pressure gas seal connection structure |
| CN201322147Y (en) * | 2008-12-23 | 2009-10-07 | 天津钢管集团股份有限公司 | Connection structure for small-clearance collar and casing threads |
| CN201322148Y (en) * | 2008-12-23 | 2009-10-07 | 天津钢管集团股份有限公司 | High performance oil pipe hermetic seal threaded connection structure |
| WO2009134160A1 (en) * | 2008-04-30 | 2009-11-05 | Общество С Ограниченной Ответственностью "Тмк-Премиум Сервис" | Tight threaded joint for oil field pipes |
| CN201756919U (en) * | 2010-07-09 | 2011-03-09 | 天津钢管集团股份有限公司 | Threaded connection structure for operation oil pipe |
-
2010
- 2010-07-09 CN CN 201010222335 patent/CN101871325A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3870351A (en) * | 1972-03-31 | 1975-03-11 | Sumitomo Metal Ind | Threaded tube joint structure for casing, particularly oil well tubing |
| US5133576A (en) * | 1991-02-28 | 1992-07-28 | Barnhill W J | Carbide coated blast tube construction for use in oil and gas well completion across perforations |
| CN2793296Y (en) * | 2005-05-16 | 2006-07-05 | 江苏曙光集团有限公司 | Welded and accentuated drilling rod |
| CN201013253Y (en) * | 2007-01-31 | 2008-01-30 | 中国石油天然气股份有限公司 | High-strength working pipe for oil test operation |
| WO2009134160A1 (en) * | 2008-04-30 | 2009-11-05 | Общество С Ограниченной Ответственностью "Тмк-Премиум Сервис" | Tight threaded joint for oil field pipes |
| CN201254959Y (en) * | 2008-07-17 | 2009-06-10 | 华东理工大学 | Oil pipe joint for moderating stress concentration work |
| CN201318513Y (en) * | 2008-11-22 | 2009-09-30 | 衡阳华菱连轧管有限公司 | Oil pipe high-pressure gas seal connection structure |
| CN201322147Y (en) * | 2008-12-23 | 2009-10-07 | 天津钢管集团股份有限公司 | Connection structure for small-clearance collar and casing threads |
| CN201322148Y (en) * | 2008-12-23 | 2009-10-07 | 天津钢管集团股份有限公司 | High performance oil pipe hermetic seal threaded connection structure |
| CN201756919U (en) * | 2010-07-09 | 2011-03-09 | 天津钢管集团股份有限公司 | Threaded connection structure for operation oil pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653123A (en) * | 2015-02-05 | 2015-05-27 | 江苏常宝钢管股份有限公司 | Coupling-free direct connecting spinning joint oil pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202946041U (en) | Zigzag air-sealed oil well pipe thread joint structure | |
| CN201705226U (en) | Integral type double-shoulder sulfur resistant drill rod | |
| CN101824969A (en) | Double-shoulder double-sealing face screwed nipple and collar-free oil well pipe using same | |
| CN201322148Y (en) | High performance oil pipe hermetic seal threaded connection structure | |
| CN105672904A (en) | Directly-connected hermetically sealed sleeve for high temperature and high pressure ultra-deep well | |
| CN201322147Y (en) | Connection structure for small-clearance collar and casing threads | |
| CN201756919U (en) | Threaded connection structure for operation oil pipe | |
| US20170370162A1 (en) | Tubular component with a helical abutment | |
| CN201763269U (en) | Double-shoulder double-seal surface threaded connector and collar-free oil well pipe adopting same | |
| CN202039786U (en) | Connecting structure for high-pressure well completion oil pipe | |
| CN201103349Y (en) | Screwed tie-in of oil casing tube | |
| US20210047889A1 (en) | Coupling for connecting downhole tubulars | |
| CN204139992U (en) | A kind of gas well at HTHP hermetic seal threaded connection structure of petroleum casing pipe | |
| CN201254959Y (en) | Oil pipe joint for moderating stress concentration work | |
| CN201547428U (en) | Three-dimensional seal tensile oil bushing connector | |
| CN207004443U (en) | A kind of nipple | |
| CN101899953A (en) | Thread joint structure for high-performance oil casing | |
| CN104018788A (en) | Drill rod joint with thread profiles | |
| CN201574696U (en) | Large-caliber fast screwing-up sleeve thread connecting structure | |
| CN101871325A (en) | Operation tubing threaded connection structure | |
| CN101871324A (en) | Connecting structure of special high-pressure completion oil pipe | |
| CN116927676A (en) | High anti moment of torsion of oil casing, high metal self sealss screwed joint structure | |
| CN201103350Y (en) | Screwed tie-in of oil casing tube for deep mine | |
| CN102352727A (en) | 8TPI oil or casing pipe threaded connector | |
| CN201763267U (en) | Anti-bending oil sleeve threaded connection structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101027 |