CN2787817Y - Casing guide shoe - Google Patents
Casing guide shoe Download PDFInfo
- Publication number
- CN2787817Y CN2787817Y CN 200520016238 CN200520016238U CN2787817Y CN 2787817 Y CN2787817 Y CN 2787817Y CN 200520016238 CN200520016238 CN 200520016238 CN 200520016238 U CN200520016238 U CN 200520016238U CN 2787817 Y CN2787817 Y CN 2787817Y
- Authority
- CN
- China
- Prior art keywords
- roller
- pipe nipple
- rolling shaft
- centralizer
- cone
- 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 - Lifetime
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- Earth Drilling (AREA)
Abstract
The utility model relates to a tool guiding a casing pipe to lower in an oil well, which is used for oil and gas field exploitation in petroleum industry and belongs to the class of downhole tools, particularly a casing pipe guide shoe. The major structure of the utility model is a cone-shaped pipe nipple 1, an axial through hole is arranged at the middle part, the conical part is provided with an inclined hole which is communicated with the through hole at the middle part, a plurality of grooves, the centers of which are symmetrical, are arranged on the external circumference of a cylinder-shaped part at the cone-shaped top part, a roller 2 is sheathed on a rolling shaft 3, the axial length of the roller 2 is smaller than the axial length of the rolling shaft 3, the roller forms a clearance fit with the rolling shaft 3, the roller 2 and the rolling shaft 3 are installed in a groove of the cone-shaped pipe nipple 1, and both ends of the rolling shaft 3 are welded on the cone-shaped pipe nipple 1 through welding. The roller which can roll along a centralizer in the axial direction is installed on the casing pipe guide shoe of the utility model, in the process of lowering a casing pipe, the sliding friction in the contact position of the guide shoe and the wall of an oil well is changed into rolling friction, and the purpose of reducing resistance is achieved.
Description
Technical field
The utility model relates to the instrument that guide sleeves tubing string that oil-gas field development in the petroleum industry uses is gone into well, and particularly a kind of casing guide belongs to the downhole tool class.
Background technology
Casing guide is a taper or the shell shape pipe nipple that is connected on the casing string bottom.Its effect is that guiding sleeve is advanced to the well center, avoid being hampered because of sleeve bottom scraping wall cake and rock cause sleeve pipe to stop up and transfer, yet in the deep camber well because the lateral force between tubing string and well is bigger, conventional cannula guide shoe place can produce big frictional resistance, makes casing safety be lowered to difficulty and strengthens.
Summary of the invention
The purpose of this utility model is to provide a kind of casing guide, the sliding friction that the guide shoe body contacts with the borehole wall can be changed into rolling friction during casing job in the deep camber well, thereby reaches the purpose that reduces frictional resistance.
The utility model agent structure is a taper pipe nipple 1, have axially extending bore at the middle part, conical portion has inclined hole and is connected with the through hole at middle part, circular cylinder shaped portion excircle in its conical top has several centrosymmetric grooves, roller 2 is sleeved on the roller bearing 3, and the axial length of roller 2 is less than the axial length of roller bearing 3, and roller 2 is a matched in clearance with roller bearing 3, roller 2 is placed in the groove of taper pipe nipple 1 with roller bearing 3, and roller bearing 3 two ends are fixed by welding on the taper pipe nipple 1.
The utility model has been installed on casing guide and can in the setting of casing process rolling friction have been changed in the sliding friction of guide shoe and borehole wall contact position, thereby reached the purpose of falling resistance along the axial roller that rolls of centralizer.
Description of drawings
Fig. 1 the utility model structural representation
Fig. 2 is the A-A sectional view of Fig. 1
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described in detail.
As shown in Figure 1, the utility model agent structure is a taper pipe nipple 1, have axially extending bore at the middle part, conical portion has inclined hole and is connected with the through hole at middle part, circular cylinder shaped portion excircle in its conical top has several centrosymmetric grooves, roller 2 is sleeved on the roller bearing 3, the axial length of roller 2 is less than the axial length of roller bearing 4, and roller 2 is a matched in clearance with roller bearing 3, roller 2 is placed in the groove of taper pipe nipple 1 with roller bearing 3, and roller bearing 3 two ends are fixed by welding on the taper pipe nipple 1.
As further improvement of the utility model, roller 2 can adopt spindle, and formed outline of the roller that is positioned at the centralizer arbitrary section and centralizer body are concentric circles, and the formed outline external diameter of the roller of centralizer arbitrary section is slightly larger than the external diameter of centralizer outline that righting strip forms, can make the roller and the borehole wall that bigger contact surface is arranged like this, make resistance reducing effect better.
Claims (3)
1, a kind of casing guide, its structure is a taper pipe nipple (1), have axially extending bore at the middle part, conical portion has inclined hole and is connected with the through hole at middle part, it is characterized in that: the circular cylinder shaped portion excircle in its conical top has several centrosymmetric grooves, roller (2) is sleeved on the roller bearing (3), the axial length of roller (2) is less than the axial length of roller bearing (3), and roller (2) is a matched in clearance with roller bearing (3), roller (2) is placed in the groove of taper pipe nipple (1) with roller bearing (3), and roller bearing (3) two ends are fixed by welding on the taper pipe nipple (1).
2, casing guide according to claim 1 is characterized in that: roller (2) is designed to spindle, and the formed outline of roller and the centralizer body that are positioned at the centralizer arbitrary section are concentric circles.
3, casing guide according to claim 2 is characterized in that: the formed outline external diameter of the roller of centralizer arbitrary section is slightly larger than the external diameter of centralizer outline that righting strip forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520016238 CN2787817Y (en) | 2005-04-04 | 2005-04-04 | Casing guide shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520016238 CN2787817Y (en) | 2005-04-04 | 2005-04-04 | Casing guide shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2787817Y true CN2787817Y (en) | 2006-06-14 |
Family
ID=36786112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520016238 Expired - Lifetime CN2787817Y (en) | 2005-04-04 | 2005-04-04 | Casing guide shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2787817Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278080A (en) * | 2011-08-17 | 2011-12-14 | 四川蓉瑞华宝科技有限公司 | Hydraulically-operated rotary casing guide shoe |
| CN102392610A (en) * | 2011-12-01 | 2012-03-28 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Design method of sleeve eccentric guide shoe |
| CN103075117A (en) * | 2013-01-06 | 2013-05-01 | 中国海洋石油总公司 | Pipe shoe for water-insulating conduit to penetrate quickly |
| CN110608006A (en) * | 2019-09-24 | 2019-12-24 | 重庆科技学院 | Well wall repairing type roller guide shoe |
-
2005
- 2005-04-04 CN CN 200520016238 patent/CN2787817Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278080A (en) * | 2011-08-17 | 2011-12-14 | 四川蓉瑞华宝科技有限公司 | Hydraulically-operated rotary casing guide shoe |
| CN102278080B (en) * | 2011-08-17 | 2013-05-22 | 四川蓉瑞华宝科技有限公司 | Hydraulically-operated rotary casing guide shoe |
| CN102392610A (en) * | 2011-12-01 | 2012-03-28 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Design method of sleeve eccentric guide shoe |
| CN103075117A (en) * | 2013-01-06 | 2013-05-01 | 中国海洋石油总公司 | Pipe shoe for water-insulating conduit to penetrate quickly |
| CN103075117B (en) * | 2013-01-06 | 2015-12-02 | 中国海洋石油总公司 | One penetrates riser pipe shoe soon |
| CN110608006A (en) * | 2019-09-24 | 2019-12-24 | 重庆科技学院 | Well wall repairing type roller guide shoe |
| CN110608006B (en) * | 2019-09-24 | 2024-05-10 | 重庆科技学院 | Roller guide shoe for repairing well wall |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081212 Address after: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee after: Western Drilling Kelamayi Drilling Technology Institute Address before: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee before: Research Inst of Drilling Technology, Xinjiang Petroleum Administration |
|
| ASS | Succession or assignment of patent right |
Owner name: WEST DRILLING KARAMAY DRILLING CRAFT RESEARCH INST Free format text: FORMER OWNER: DRILLING WELL TECHNOLOGY INSTITUTE, PETROLEUM ADMINISTRATION BUREAU, XINJIANG Effective date: 20081212 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150404 Granted publication date: 20060614 |