CN202970525U - Screw drill centralizer structure - Google Patents
Screw drill centralizer structure Download PDFInfo
- Publication number
- CN202970525U CN202970525U CN 201220637922 CN201220637922U CN202970525U CN 202970525 U CN202970525 U CN 202970525U CN 201220637922 CN201220637922 CN 201220637922 CN 201220637922 U CN201220637922 U CN 201220637922U CN 202970525 U CN202970525 U CN 202970525U
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- CN
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- centralizer
- wiper block
- centralizer body
- wiper blocks
- wiper
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Abstract
The utility model discloses a screw drill centralizer structure which comprises a centralizer body and wiper blocks which are arranged on the centralizer body. The wiper blocks are right prism-shaped, and the wiper blocks are arranged on the centralizer body in the axial direction, the distances between every two adjacent wiper blocks are equal, and the wiper blocks and the centralizer body are combined into a whole structure. The screw drill centralizer structure is easy to move vertically but difficult to move horizontally after pressurization under the condition that downhole safety construction and oriented quality are not affected, the influences upon horizontal swing of the centralizer caused by reaction torque are reduced effectively, wherein the reaction torque is generated by contacting of a drill bit and a pit bottom, and therefore the speed of deep mine orientation is accelerated.
Description
Technical field
The utility model relates to a kind of centralizer for screwdrill structure, is applied to the petroleum drilling technology field, improves deep-well directed drilling speed.
Background technology
in order to realize excellent fast drilling well, in existing deep-well directional technology, the field engineering technician has found out many improvement technologies, wherein the centralizer for screwdrill architecture advances is wherein a kind of, for example China Patent No. " CN200820080664.3 " discloses a kind of half chip single bend PDM centralizer, open day is on 03 11st, 2009, it has long 300-500mm at single bend PDM drilling tool outer wall bottom welding, thick 40-60mm, three centralizers of wide 40-80mm, being radial between three centralizers is arranged in parallel, angle between three centralizers is between the 55-65 degree.There is the inclined-plane at the two ends of every centralizer, and the minimum angles on inclined-plane is between 30-45 °.
Existing centralizer outside is the helical form wiper block, in use there is following deficiency: produce reaction torque after one, contacting the shaft bottom because of drill bit after each orientation pendulum positive position, can cause centralizer to swing, affect precision, need to again put the orientation when serious, thereby affect the deep-well directed velocity.Two, aspect speed, existing helical form wiper block pendulum orientation is 5-8 minute, and tool-face is unstable during directional drilling, causes bearing swing repeatedly to put the orientation because creeping into, and bit speed is had considerable influence.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above of the centralizer existence that has the helical form wiper block now, a kind of centralizer for screwdrill structure is provided, the utility model is not affecting under downhole safety construction and directed quality prerequisite, can be easily after pressurization up and down and the left and right activity is more difficult, can effectively reduce because produce reaction torque behind drill bit contact shaft bottom and cause the centralizer impact that swings, thus raising deep-well directed velocity.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of centralizer for screwdrill structure, comprise the wiper block that arranges on centralizer body and centralizer body, it is characterized in that: described wiper block is the straightedge column, wiper block is along the axial setting of centralizer body, distance between adjacent two wiper blocks is identical, and wiper block and centralizer body are the integral type structure.
Described wiper block is straight quadrangular shape, and there is an inclined-plane to the centralizer body inclination at two ends.
Described wiper block is more than three or three.
Employing the utility model has the advantage of:
One, in the utility model, described wiper block is the straightedge column, wiper block is along the axial setting of centralizer body, distance between adjacent two wiper blocks is identical, and wiper block and centralizer body are the integral type structure, existing helical form wiper block is improved to straightedge column wiper block, can reduces after each orientation pendulum positive position to cause the centralizer impact that swings because produce reaction torque behind drill bit contact shaft bottom, thus raising deep-well directed velocity; Be to bring up to 3-5 minute in 5-8 minute from existing pendulum orientation, and tool-face is stable during directional drilling, avoids causing bearing swing repeatedly to put the orientation because creeping into, and drilling speed is had remarkable result.
Two, in the utility model, described wiper block is straight quadrangular shape, there is an inclined-plane to the centralizer body inclination at two ends, can realize ajusting fast tool-face and be difficult for changing when being used for the deep-well orientation, can improve the deep-well directed velocity, increase annular clearance, drilling tool structure is simplified, increased the downhole safety coefficient.
Three, in the utility model, described wiper block is more than three or three, when wiper block quantity reaches 3 and just can realize ajusting fast tool-face and being difficult for changing when above.
Description of drawings
Fig. 1 is the utility model master TV structure schematic diagram
Fig. 2 is the utility model plan structure schematic diagram
Be labeled as in figure: 1, centralizer body, 2, wiper block, 3, the inclined-plane.
The specific embodiment
A kind of centralizer for screwdrill structure, comprise the wiper block 2 that arranges on centralizer body 1 and centralizer body 1, described wiper block 2 is the straightedge column, wiper block 2 is along the axial setting of centralizer body 1, distance between adjacent two wiper blocks 2 is identical, and wiper block 2 is the integral type structure with centralizer body 1.
Preferred embodiment of the present utility model is, described wiper block 2 is straight quadrangular shape, especially is advisable with rectangular-shaped, and two ends have one to the inclined-plane 3 that centralizer body 1 tilts, and the gradient on inclined-plane can be 35-40 °.
Another preferred embodiment of the present utility model is that described wiper block can be selected to set according to actual condition more than 2 three or three.
The utility model changes original centralizer external helicoid shape wiper block into straightedge column wiper block, pressurization is rear because wiper block presses the borehole wall like this, can be easily the up and down and movable difficulty in left and right, can effectively reduce because produce reaction torque behind drill bit contact shaft bottom and cause the centralizer impact that swings, thus raising deep-well directed velocity.
Claims (3)
1. centralizer for screwdrill structure, comprise the upper wiper block (2) that arranges of centralizer body (1) and centralizer body (1), it is characterized in that: described wiper block (2) is the straightedge column, wiper block (2) is along the axial setting of centralizer body (1), distance between adjacent two wiper blocks (2) is identical, and wiper block (2) is the integral type structure with centralizer body (1).
2. centralizer for screwdrill structure according to claim 1, it is characterized in that: described wiper block (2) is straight quadrangular shape, and two ends have one to inclined-plane (3) that centralizer body (1) tilts.
3. centralizer for screwdrill structure according to claim 1 and 2, it is characterized in that: described wiper block (2) is more than three or three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220637922 CN202970525U (en) | 2012-11-28 | 2012-11-28 | Screw drill centralizer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220637922 CN202970525U (en) | 2012-11-28 | 2012-11-28 | Screw drill centralizer structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202970525U true CN202970525U (en) | 2013-06-05 |
Family
ID=48511613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220637922 Expired - Lifetime CN202970525U (en) | 2012-11-28 | 2012-11-28 | Screw drill centralizer structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202970525U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541665A (en) * | 2013-10-28 | 2014-01-29 | 天津市伯乔工贸有限公司 | Casting type sucker rod centralizer |
| CN108331537A (en) * | 2018-03-19 | 2018-07-27 | 山东博诺利石油装备有限公司 | A kind of tubing centrilizer |
-
2012
- 2012-11-28 CN CN 201220637922 patent/CN202970525U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541665A (en) * | 2013-10-28 | 2014-01-29 | 天津市伯乔工贸有限公司 | Casting type sucker rod centralizer |
| CN108331537A (en) * | 2018-03-19 | 2018-07-27 | 山东博诺利石油装备有限公司 | A kind of tubing centrilizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
|
| CX01 | Expiry of patent term |