CN202202822U - Torque-reducing connector for a drill rod - Google Patents
Torque-reducing connector for a drill rod Download PDFInfo
- Publication number
- CN202202822U CN202202822U CN2011203361338U CN201120336133U CN202202822U CN 202202822 U CN202202822 U CN 202202822U CN 2011203361338 U CN2011203361338 U CN 2011203361338U CN 201120336133 U CN201120336133 U CN 201120336133U CN 202202822 U CN202202822 U CN 202202822U
- Authority
- CN
- China
- Prior art keywords
- connector
- connecting body
- drill rod
- rotary sleeve
- drilling rod
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a torque-reducing connector for a drill rod, and solves the problem of mutual friction between a collar of the drill rod and a wall side or a sleeve during the rotation of a drill string. The connector comprises an upper connecting body, a lower connecting body and a rotary sleeve, wherein internal threads are formed at the upper end of the upper connecting body; the upper end of the upper connecting body is connected with an upper drill rod; external threads are formed at the lower end of the lower connecting body; the lower end of the lower connecting body is connected with a lower drill rod; the internal/external diameter of the upper connecting body is the same as that of the lower connecting body; the upper connecting body is in threaded connection with the lower connecting body; outer shoulders are processed on the outer walls of the upper and the lower connecting bodies respectively; the rotary sleeve is sleeved between the two outer shoulders of the upper and the lower connecting bodies, and can rotate around the connecting bodies; and the external diameter of the rotary sleeve is larger than the maximal external diameter of the upper connecting body or the lower connecting body. During well drilling, the rotary sleeve of the connector does not rotate, or rotates with a very low speed, so as to reduce the friction between the drill rod and the sleeve, effectively protect the sleeve, right the drill rod, and protect the collar. Therefore, the drill rod is guaranteed to rotate fast, safely and normally; and torque is transmitted.
Description
Technical field
The utility model relates in the oilfield drilling, the protective device that cooperates drill string to use.
Background technology
In drilling process, rotary power passes to drill bit through drill string.In the rotary course of drill string because drill pipe coupling and the borehole wall or and sleeve pipe between mutual friction mutually, make this transmission of reversing power become very difficult, pit shaft is long more, contact point is many more, the frictional resistance of generation increases thereupon; Because big loss of machine of torque influences the performance of rig efficient on the one hand greatly, has reduced the maximum delivered power of rig; On the other hand because the increase of the frictional force between drill string and the borehole wall, the sleeve pipe, for keep the drill bit place certain creep into moment of torsion; Must increase the torque load of drill string; Accelerated the degree of fatigue of drill string, reduced the application life of drill string and sleeve pipe, these all can influence the safety of rapid drilling.
Summary of the invention
The purpose of the utility model provides a kind of drilling rod and subtracts twist joint; When this subtracts twist joint and in the process that guarantees the moment of torsion transmission, can reduce the drilling rod rotation and the friction of sleeve pipe; Promptly drilling rod being played centralizing function plays a protective role to sleeve pipe again; Improve the application life of drilling rod and sleeve pipe, guaranteed the safety of rapid drilling.
For realizing the foregoing invention purpose, the technical scheme that the utility model adopts is: drilling rod subtracts twist joint, comprises connector and following connector, and said upward connector is a cylindrical tube shape, and its upper end is processed with internal thread, and last connector is connected with last drilling rod through this internal thread; Said connector down is a cylindrical tube shape, and its lower end is processed with external screw thread, and following connector is connected with following drilling rod through this external screw thread; The inside and outside footpath of upper and lower connector equates, through being threaded, is starting point with upper and lower connector junction in addition between the two, along the equal distance that extends axially of upper and lower connector, is processed with outer shoulder respectively respectively; This subtracts twist joint and also comprises a rotary sleeve, and this rotary sleeve is enclosed between the two outer shoulders of upper and lower connector, and its height equates that with distance between the two outer shoulders and can rotate around connector, the external diameter of rotary sleeve is greater than maximum outside diameter last or time connector.
In order to reduce the friction of rotary sleeve and upper and lower connector outer wall, upper and lower connector two outside on the outer wall between the shoulder, be processed with horizontal or vertical groove.
The beneficial effect of the utility model: the application's drilling rod subtracts twist joint; Be provided with the rotary sleeve parts; This rotary sleeve is stuck between the outer shoulder of two connectors and can not moves up and down; Can only rotate, and the external diameter of rotary sleeve is greater than the maximum outside diameter of connector, thereby drilling rod has been played the effect of supporting.This joint is installed between two drilling rods during drilling well; The body of this joint rotates with drilling rod, but rotary sleeve or do not rotate or very slow rotation has reduced the friction of drilling rod and sleeve pipe; Effectively protected sleeve pipe; Drilling rod is promptly played the effect of setting upright again box cupling is played a protective role, finally guaranteed the normal rotation that drilling rod is not only fast but also safe, transfer torque.
Description of drawings
Fig. 1 is the structural representation that the utility model drilling rod subtracts twist joint.
Among the figure: the last connector of 1-; Connector under the 2-; The 3-rotary sleeve; The 4-groove.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described:
By shown in Figure 1: drilling rod subtracts twist joint, comprises connector 1 and following connector 2, and said upward connector 1 is a cylindrical tube shape, and the upper end of last connector 1 is processed with internal thread, and last connector 1 is connected with last drilling rod through this internal thread; Said connector 2 down is a cylindrical tube shape, and the lower end of following connector 2 is processed with external screw thread, and following connector 2 is connected with following drilling rod through this external screw thread; The inside and outside footpath of upper and lower connector equates, through being threaded, is starting point with upper and lower connector junction between the two, along the equal distance that extends axially of upper and lower connector, is processed with outer shoulder respectively respectively; This subtracts twist joint and also comprises a rotary sleeve 3; This rotary sleeve 3 is enclosed between the outer shoulder of upper and lower connector; Its height with two outer shoulders between distance equate that promptly rotary sleeve 3 is between the two outer shoulders and can not moves up and down, but can rotate around connector; The external diameter of rotary sleeve 3 is greater than the maximum outside diameter of last or following connector in addition; Drilling rod has been played the effect of supporting, thereby reduced when drilling rod rotates and the contact area of sleeve pipe, drilling rod has promptly been played the effect of setting upright again box cupling is played a protective role.
This joint is installed between two drilling rods during drilling well; The upper and lower connector of this joint rotates with drilling rod; But rotary sleeve 3 or do not rotate or very slow rotation has reduced the friction of drilling rod and sleeve pipe, has effectively protected sleeve pipe; Rotary sleeve 3 can make the drilling rod normal rotation help the transmission of moment of torsion simultaneously, makes not only fast but also safe the carrying out of drilling well.
In order to reduce the friction of rotary sleeve 3 and upper and lower connector outer wall; Upper and lower connector two outside on the outer wall between the shoulder; Be processed with horizontal or vertical groove 4, obvious, the existence of this groove 4 has reduced the contact area of rotary sleeve 3 with connector; Also just reduce the friction between the two, improved the application life of joint integral body.
Claims (2)
1. a drilling rod subtracts twist joint, comprises connector and following connector, it is characterized in that: said upward connector is a cylindrical tube shape, and its upper end is processed with internal thread, and last connector is connected with last drilling rod through this internal thread; Said connector down is a cylindrical tube shape, and its lower end is processed with external screw thread, and following connector is connected with following drilling rod through this external screw thread; The inside and outside footpath of upper and lower connector equates, through being threaded, is starting point with upper and lower connector junction in addition between the two, along the equal distance that extends axially of upper and lower connector, is processed with outer shoulder respectively respectively; This subtracts twist joint and also comprises a rotary sleeve, and this rotary sleeve is enclosed between the two outer shoulders of upper and lower connector, and its height equates that with distance between the two outer shoulders and can rotate around connector, the external diameter of rotary sleeve is greater than maximum outside diameter last or time connector.
2. drilling rod according to claim 1 subtracts twist joint, it is characterized in that: upper and lower connector two outside on the outer wall between the shoulder, be processed with horizontal or vertical groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203361338U CN202202822U (en) | 2011-09-08 | 2011-09-08 | Torque-reducing connector for a drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203361338U CN202202822U (en) | 2011-09-08 | 2011-09-08 | Torque-reducing connector for a drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202202822U true CN202202822U (en) | 2012-04-25 |
Family
ID=45966951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203361338U Expired - Fee Related CN202202822U (en) | 2011-09-08 | 2011-09-08 | Torque-reducing connector for a drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202202822U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612487A (en) * | 2016-12-12 | 2018-10-02 | 四川煜天石油机械设备有限公司 | A kind of spinning centralizer |
-
2011
- 2011-09-08 CN CN2011203361338U patent/CN202202822U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612487A (en) * | 2016-12-12 | 2018-10-02 | 四川煜天石油机械设备有限公司 | A kind of spinning centralizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20140908 |
|
| EXPY | Termination of patent right or utility model |