CN2861450Y - Torsion and wear reducing joint of flow passage type drill rod - Google Patents
Torsion and wear reducing joint of flow passage type drill rod Download PDFInfo
- Publication number
- CN2861450Y CN2861450Y CN 200520133797 CN200520133797U CN2861450Y CN 2861450 Y CN2861450 Y CN 2861450Y CN 200520133797 CN200520133797 CN 200520133797 CN 200520133797 U CN200520133797 U CN 200520133797U CN 2861450 Y CN2861450 Y CN 2861450Y
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- CN
- China
- Prior art keywords
- sleeve
- joint
- steel ball
- tool
- torsion
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- Expired - Fee Related
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Abstract
Disclosed is a downhole tool that is applied in extended-reach well of oil hole-making to reduce downhole friction resistance and torque, which primarily solves the insufficiency that no ideal torque and friction reducing tool is in the open hole section of extended-reach well. It is characterized in that the joint consists of a main shaft, a fastening screw, an external sleeve (3), an internal sleeve (1), a steel ball (2) and a dynamic sealing ring (4), wherein the external sleeve (3) has the channel-type structure with groove and is connected with the internal sleeve (1) via steel ball (2), the dynamic sealing ring (4) is embedded on the contact surface between the external sleeve (3) and the internal sleeve (1). The tool may reduce downhole friction resistance and torque in the open hole section of extended-reach well, protect the drill stem joint and ensure the smooth drilling.
Description
Technical field:
The utility model relates to underground work instrument used in the oil recovery field, oil field, especially relates to a kind of downhole tool that reduces down-hole frictional resistance and moment of torsion in the oil drilling extended reach well that is applied in.
Background technology:
In the drilling process of extended reach well, the frictional resistance moment of torsion is very high, and because the resistance to tension of drill string is better than anti-twisting property, so moment of torsion just becomes the main restricting factor of boring extended reach well.Therefore in actual production, the technician has pressed for a kind of downhole tool that can reduce the frictional resistance moment of torsion.Had both at home and abroad at present several subtract turn round, antifriction tool, wherein part is to reduce moment of torsion by adopting the very little elastomeric material of friction factor etc. to reduce moment of torsion, having plenty of by rolling bearing.But these existing instruments all are to be applied in the sleeve pipe, and in the bore hole section, because urceolus then make the talus deposit of instrument bottom easily, causes bit freezing, so at present domestic do not have also in this field that desirable subtracting turned round, antifriction tool
The utility model content:
Do not have in order to overcome existing extended reach well that desirable subtracting turned round, the deficiency of antifriction tool in the bore hole section; the utility model provides a kind of flow channel type drilling rod to subtract to turn round to fall the joint that rubs; this kind flow channel type drilling rod subtracts to turn round and falls the joint that rubs and have the effect that can be in the extended reach well drilling process reduces frictional resistance and moment of torsion in the bore hole section, protection tool joint intact and carrying out smoothly of creeping into.
The technical solution of the utility model is: this kind flow channel type drilling rod subtracts to turn round and falls the joint that rubs, comprise main shaft, holding screw, outer sleeve, inner sleeve, and steel ball, dynamic seal ring, wherein outer sleeve is the flow channel type structure with groove, its with inner sleeve between be connected by steel ball, dynamic seal ring is embedded on the contact surface between outer sleeve and the inner sleeve.
The utlity model has following beneficial effect: connect by steel ball owing to the flow channel type drilling rod of taking such scheme subtracts to turn round between the inside and outside tube that falls the joint that rubs, urceolus contacts with the borehole wall, do not rotate with drill string, because between urceolus and the interior axle is rolling friction, so frictional force is very little, therefore can significantly reduce loss of machine of torque.In addition,, can prevent because the one side that instrument is pressed close to the shaft bottom in the extended reach well horizontal segment, cause the mud deposition and the bit freezing that causes because urceolus makes flow channel type.In addition, main shaft and outer sleeve are made groove type, between steel ball can also play the effect of axial location, simple and safe more reliable than this type of tool construction in the past.Bigger owing to subtracting twist joint simultaneously than tool joint external diameter, so tool joint is not contacted with the borehole wall or sleeve pipe, play the effect of protection tool joint.
Description of drawings:
Accompanying drawing 1 is a structure sectional view of the present utility model.
1-inner sleeve among the figure, 2-steel ball, 3-outer sleeve, 4-dynamic seal ring.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, this kind flow channel type drilling rod subtracts to turn round and falls the joint that rubs, and comprises main shaft, holding screw, outer sleeve 3, inner sleeve 1, and steel ball 2, dynamic seal ring 4.Wherein outer sleeve 3 is for having the flow channel type structure of groove, its with inner sleeve 1 between be connected by steel ball 2, dynamic seal ring 4 is selected V for use
DDynamic seal ring can prevent that like this drilling fluid and landwaste from entering in the bearing arrangement.In the technical program, connect by steel ball between the inside and outside tube, and urceolus contacts with the borehole wall, does not rotate with drill string, rotates between urceolus and the interior axle, thus be rolling friction between urceolus and the interior axle, so frictional force is very little, can significantly reduce loss of machine of torque.Bigger owing to subtracting twist joint simultaneously than tool joint external diameter, so tool joint is not contacted with the borehole wall or sleeve pipe, play the effect of protection tool joint.In addition, outer sleeve 3 is made flow channel type in the utility model, causes mud to deposit the bit freezing that causes to prevent the one side of pressing close to the shaft bottom owing to instrument in the extended reach well horizontal segment.Main shaft and outer sleeve are made groove type, between steel ball can also play the effect of axial location, simple and safe more reliable than this type of tool construction in the past.
During actual the use, this kind joint is useful in the extended reach well drilling process can effectively reduces frictional resistance and moment of torsion in the bore hole section, what protection tool joint intact and guaranteeing crept into carries out smoothly.
Claims (1)
1, a kind of flow channel type drilling rod subtracts to turn round and falls the joint that rubs, comprise main shaft, holding screw, outer sleeve (3), inner sleeve (1), it is characterized in that: described joint also comprises steel ball (2), dynamic seal ring (4), wherein outer sleeve (3) is for having the flow channel type structure of groove, its with inner sleeve (1) between be connected by steel ball (2), dynamic seal ring (4) is embedded on the contact surface between outer sleeve (3) and the inner sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520133797 CN2861450Y (en) | 2005-10-21 | 2005-10-21 | Torsion and wear reducing joint of flow passage type drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520133797 CN2861450Y (en) | 2005-10-21 | 2005-10-21 | Torsion and wear reducing joint of flow passage type drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2861450Y true CN2861450Y (en) | 2007-01-24 |
Family
ID=37659079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520133797 Expired - Fee Related CN2861450Y (en) | 2005-10-21 | 2005-10-21 | Torsion and wear reducing joint of flow passage type drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2861450Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899255A (en) * | 2012-12-28 | 2014-07-02 | 中国石油化工股份有限公司 | Ball-type anti-attrition twist and drag reduction tool for petroleum drilling |
| CN105909189A (en) * | 2016-06-13 | 2016-08-31 | 西安石油大学 | Anti-abrasion device for casing pipe |
| CN114562219A (en) * | 2020-11-27 | 2022-05-31 | 中国石油化工股份有限公司 | Drilling rod torque reducer |
-
2005
- 2005-10-21 CN CN 200520133797 patent/CN2861450Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899255A (en) * | 2012-12-28 | 2014-07-02 | 中国石油化工股份有限公司 | Ball-type anti-attrition twist and drag reduction tool for petroleum drilling |
| CN105909189A (en) * | 2016-06-13 | 2016-08-31 | 西安石油大学 | Anti-abrasion device for casing pipe |
| CN114562219A (en) * | 2020-11-27 | 2022-05-31 | 中国石油化工股份有限公司 | Drilling rod torque reducer |
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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: 20070124 Termination date: 20101021 |