CN201059167Y - Round spindle telescopic joint - Google Patents
Round spindle telescopic joint Download PDFInfo
- Publication number
- CN201059167Y CN201059167Y CNU2007200318467U CN200720031846U CN201059167Y CN 201059167 Y CN201059167 Y CN 201059167Y CN U2007200318467 U CNU2007200318467 U CN U2007200318467U CN 200720031846 U CN200720031846 U CN 200720031846U CN 201059167 Y CN201059167 Y CN 201059167Y
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- telescopic
- joint
- utility
- model
- telescopic slide
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- Expired - Fee Related
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Abstract
A circle center axis telescopic joint belongs to the oil drilling equipment technical field, and comprises a telescopic sliding part and a connecting part, wherein, an upper joint is connected with a lower joint through the telescopic sliding part and the connecting part to form the joint; moreover, the telescopic sliding part adopts circular telescopic mandrel inner spline sliding telescopic sealing face. The utility model, which adopts the circular mandrel inner spline sliding telescopic sealing face, effectively improves the sealing performance of the telescopic joint and reduces overall length; therefore, stress forms are improved and the utility model can endure higher pressure stage; meanwhile, connecting nuts are adopted to connect the telescopic sections of the utility model, thereby ensuring convenient using and storing of a tool; in addition, an inner spline ensures that an expansion travel can meet the requirements of use, and is more suitable to be used in testing oil and acid fracturing operation.
Description
Technical field
The utility model belongs to the oil drilling equipment technical field, particularly formation testing test offshore platform and examination of land oil gas well surveying and acid fracturing field.
Background technology
At present in platform and land oil gas well oil gas well surveying examination at sea and the acid fracturing operation, main adopt six side's axle expansion joints to offset platform, and the length of running string is adjusted in the land operation with wave the rise and fall variation of the pipe column volumes that causes or the change of the hot collapsing length of tubing string that the fracturing work variations in temperature causes.Be characterized in utilizing six side's link mandrels to carry out telescopic slide, utilize six sides to come transfer torque, sealing is by the sealing of six side's sealing rings.The sealability of six sides sealing is reliable not as good as the sealing of O type, is easy to generate leakage often; And entire length is longer.Unrestricted flexible device, instrument is in the state that freely stretches all the time, the inconvenience that causes carrying and install.
Summary of the invention
Purpose of design of the present utility model is a kind of circle core shaft expansion joint of design, adopts circular flexible axle internal spline sliding extension sealing surface, improves the seal form of instrument, improves the reliability of sealability and use.Make instrument be convenient to carrying and installation.
Specifically, the circle core shaft expansion joint comprises telescopic slide and coupling part, and relies on telescopic slide and coupling part that top connection (1) and lower contact (6) are connected to form, and telescopic slide partly adopts circular flexible axle internal spline sliding extension sealing surface.
Described telescopic slide part mainly is made up of top connection (1), lock dog (2), upper spindle (3), in top connection (1) inner spline groove is arranged and relies on lock dog (2) to transmit torque to upper spindle (3).
Described coupling part by under connect pipe nipple (4), attaching nut (5) and lower contact (6) and form; The attaching nut (5) who freely stretches by a restriction instrument connects connection pipe nipple (4) and lower contact (6) down.
The utility model is compared with background technology has following characteristics: adopted circular flexible axle internal spline sliding extension sealing surface mechanism, solved the unreliable problem of leakage and the problem of transmission of moment of torsion of being easy to generate of six side's axle sealabilities effectively; Adopted the flexible attaching nut of restriction, the instrument that makes no longer is in the state that freely stretches, the loading and unloading of being convenient to carry at any time as instrument in the past.
Description of drawings
Accompanying drawing is the utility model structural representation.
The specific embodiment
This utility model is suitable for CAS and detains be threaded tubing string and instrument section.Structure of the present utility model is made up of telescopic slide and coupling part as shown in drawings.The structural concept of telescopic slide part is: adopt circular flexible axle internal spline sliding extension sealing surface.It mainly part such as is formed by top connection (1), lock dog (2), upper spindle (3) and forms.Its operating principle is: flexible axle adopts circular, and internal spline and lock dog (2) by top connection (1) transfer torque on the flexible axle (3).Thereby solved the transmission of circular spindle, improved the sealability of instrument simultaneously moment of torsion.The structural concept of coupling part is: by increasing the attaching nut (5) that a restriction instrument freely stretches, connect and connect pipe nipple (4) and lower contact (6) down.Its operating principle is: when instrument is not gone into the well, attaching nut (5) connects down and connects pipe nipple (4) and lower contact (6), so just can pin instrument, and it can freely not stretched, can make tool when carrying and loading and unloading, can not make troubles because expansion joint is freely extended.When instrument began to go into the well, releasing attaching nut (5) was connected with lower contact (6), and instrument just is in normal operating condition.
Claims (3)
1. circle core shaft expansion joint comprises telescopic slide and coupling part, and relies on telescopic slide and coupling part that top connection (1) and lower contact (6) are connected to form, and it is characterized in that telescopic slide partly adopts circular flexible axle internal spline sliding extension sealing surface.
2. circle core shaft expansion joint according to claim 1, it is characterized in that described telescopic slide part mainly is made up of top connection (1), lock dog (2), upper spindle (3), in top connection (1), inner spline groove is arranged and rely on lock dog (2) to transmit torque to upper spindle (3).
3. circle core shaft expansion joint according to claim 1, it is characterized in that described coupling part by under connect pipe nipple (4), attaching nut (5) and lower contact (6) and form; The attaching nut (5) who freely stretches by a restriction instrument connects connection pipe nipple (4) and lower contact (6) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200318467U CN201059167Y (en) | 2007-05-15 | 2007-05-15 | Round spindle telescopic joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200318467U CN201059167Y (en) | 2007-05-15 | 2007-05-15 | Round spindle telescopic joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201059167Y true CN201059167Y (en) | 2008-05-14 |
Family
ID=39407636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200318467U Expired - Fee Related CN201059167Y (en) | 2007-05-15 | 2007-05-15 | Round spindle telescopic joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201059167Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401499A (en) * | 2016-11-08 | 2017-02-15 | 中国海洋石油总公司 | Telescopic pipe suitable for floating platform testing |
| CN115163646A (en) * | 2022-07-12 | 2022-10-11 | 西南石油大学 | Stepless telescopic sealing shaft capable of simultaneously transmitting torque and bit pressure |
-
2007
- 2007-05-15 CN CNU2007200318467U patent/CN201059167Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401499A (en) * | 2016-11-08 | 2017-02-15 | 中国海洋石油总公司 | Telescopic pipe suitable for floating platform testing |
| CN115163646A (en) * | 2022-07-12 | 2022-10-11 | 西南石油大学 | Stepless telescopic sealing shaft capable of simultaneously transmitting torque and bit pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20130515 |