CN2846712Y - Back-off bearing anti-drop device of tail tube suspension device neutral point - Google Patents
Back-off bearing anti-drop device of tail tube suspension device neutral point Download PDFInfo
- Publication number
- CN2846712Y CN2846712Y CN 200520093696 CN200520093696U CN2846712Y CN 2846712 Y CN2846712 Y CN 2846712Y CN 200520093696 CN200520093696 CN 200520093696 CN 200520093696 U CN200520093696 U CN 200520093696U CN 2846712 Y CN2846712 Y CN 2846712Y
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- Prior art keywords
- joint
- bearing
- utility
- model
- spline
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- Expired - Fee Related
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Abstract
The utility model relates to a bearing drop preventing device for the reverse of neutral points of a tail tube hanger, which is used for the well completion of a sidetracked well and a horizontal well. The utility model is composed of a reversing joint 1, a cone 2, a female joint 3, a buckle changing joint 4, a bearing 5, bearing protective sleeves 6, 7, a spline joint 8 and a spring 9, wherein the upper and the lower ends of the buckle changing joint 3 are respectively connected with the reversing joint 1 and the spline joint 8 through threads; the outsides of the three joints are sheathed with the female joint 3; the cone 2 is arranged between the reversing joint 1 and the buckle changing joint 3; the bearing protective sleeves 6, 7 are correspondingly arranged from top to bottom in a gap between the spline joint 8 and the female joint 3; the bearing 5 is arranged in a gap between the two bearing protective sleeves 6, 7; the spring 9 is arranged below the bearing protective sleeve 7. The utility model has the advantages of reasonable design, simple structure and reliable operation; the utility model is used for effectively preventing the bearing from dropping and downhole accidents from happening when neutral points of the well completion construction of the sidetracked well and the horizontal well are reversed.
Description
Technical field:
The utility model relates to a kind of accessory that is used for sidetracked hole, horizontal well liner completion instrument.
Background technology:
Along with the development of the continuity of oil field development time and sidetracked hole, horizontal well drilling technique, sidetracked hole, horizontal well drilling, completion interval of well a few days become to increasing.In sidetracked hole, horizontal well liner completion work progress, extension hanger is important drilling liner cementing instrument, yet, the existing conventional extension hanger adopts the rigid back-off of screw thread often or utilizes exposed end face thrust bearing mode at point of neutralization back-off, thereby in the back-off process, sometimes look for inaccurate because of the point of neutralization or drilling tool presses down too many and bearing sole mass reason, normal screw thread thread gluing or broken end ring and the stuck central tube of bearing ball that comes off of taking place, cause the generation of down-hole accident, bring greater risk to cementing operation.
Summary of the invention:
The purpose of this utility model is to provide a kind of extension hanger point of neutralization back-off bearing anti-drop device that bearing comes off, avoids down-hole accident to take place that prevents can be at point of neutralization back-off in sidetracked hole, the construction of horizontal well liner completion the time.
The utility model is to realize like this.This kind bearing anti-drop device is made up of back-off joint, cone, box joint, change snapping head, bearing, bearing protecting jacket, spline joint and spring; between existing extension hanger back-off position box joint, change snapping head, spline joint three parts, adopt built-in bearing, also be about to the original anti-fall structural change of baffle-type bearing and be the anti-fall structure of protection shell type bearing.Become snapping head upper and lower end and be connected with spline joint with the back-off joint with screw thread respectively, the three joints outside is set with the box joint, is provided with cone between back-off joint and the change snapping head; Relatively be provided with bearing protecting jacket in the gap between spline joint and the box joint up and down, be provided with bearing in the gap between the two bearings protective sleeve, the bearing protecting jacket below is provided with spring.Owing to adopted two bearing protecting jackets that are oppositely arranged by upper and lower; make bearing tightly be in reliably in the gap of two protective sleeves formations; its anti-fall effect is better than the anti-fall structure of baffle-type greatly; thereby when sidetracked hole, horizontal well liner completion construction point of neutralization back-off, prevent that bearing from coming off, avoid the generation of down-hole accident.
The utility model is reasonable in design, and is simple in structure, and reliable operation utilizes it to prevent that effectively bearing from coming off, the generation of down-hole accident when sidetracked hole, horizontal well completion construction point of neutralization back-off.
Description of drawings:
Fig. 1 is the structural representation of the utility model (7 " * 5 " extension hanger).
Fig. 2 is the utility model another kind (5 " * 4 " extension hanger) structural representation.
The specific embodiment:
The utility model is provided by following examples, is illustrated below in conjunction with accompanying drawing.
As shown in the figure, the utility model is made up of back-off joint 1, cone 2, box joint 3, change snapping head 4, bearing 5, bearing protecting jacket 6,7, spline joint 8 and spring 9, its structure, assembled relation are as follows: become snapping head 3 upper and lower ends and be connected with spline joint 8 with back-off joint 1 with screw thread respectively, the three joints outside is set with box joint 3, is provided with cone 2 between back-off joint 1 and the change snapping head; Relatively be provided with bearing protecting jacket 6,7 in the gap between spline joint 8 and the box joint 3 up and down, be provided with bearing 5 in the gap between the two bearings protective sleeve 6,7, bearing protecting jacket 7 belows are provided with spring 9.Wherein, bearing protecting jacket 6,7 sizes, shape are worked in coordination, upper and lower being oppositely arranged, that is upward protective sleeve 6 peripheries are provided with round platform; following protective sleeve 7 inner headed faces are provided with round platform, and the inside and outside footpath of two protective sleeves matches with spline joint 8 external diameters and box joint 3 internal diameters respectively.
Claims (1)
1, a kind of extension hanger point of neutralization back-off bearing anti-drop device, form by back-off joint (1), cone (2), box joint (3), change snapping head (4), bearing (5), bearing protecting jacket (6), (7), spline joint (8) and spring (9), it is characterized in that: become snapping head (3) upper and lower end and be connected with spline joint (8) with back-off joint (1) with screw thread respectively, the three joints outside is set with box joint (3), is provided with cone (2) between back-off joint (1) and the change snapping head; Relatively be provided with bearing protecting jacket (6), (7) up and down in the gap between spline joint (8) and the box joint (3), be provided with bearing (5) in the gap between two bearings protective sleeve (6), (7), bearing protecting jacket (7) below is provided with spring (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520093696 CN2846712Y (en) | 2005-11-16 | 2005-11-16 | Back-off bearing anti-drop device of tail tube suspension device neutral point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520093696 CN2846712Y (en) | 2005-11-16 | 2005-11-16 | Back-off bearing anti-drop device of tail tube suspension device neutral point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2846712Y true CN2846712Y (en) | 2006-12-13 |
Family
ID=37512133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520093696 Expired - Fee Related CN2846712Y (en) | 2005-11-16 | 2005-11-16 | Back-off bearing anti-drop device of tail tube suspension device neutral point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2846712Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484689A (en) * | 2015-12-04 | 2016-04-13 | 中国石油集团川庆钻探工程有限公司 | Horizontal well liner completion well entering tool |
-
2005
- 2005-11-16 CN CN 200520093696 patent/CN2846712Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484689A (en) * | 2015-12-04 | 2016-04-13 | 中国石油集团川庆钻探工程有限公司 | Horizontal well liner completion well entering tool |
| CN105484689B (en) * | 2015-12-04 | 2018-02-16 | 中国石油集团川庆钻探工程有限公司 | Horizontal well liner completion well entering tool |
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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: 20061213 Termination date: 20101116 |