CN203640626U - Down-the-hole drill centering device - Google Patents
Down-the-hole drill centering device Download PDFInfo
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- CN203640626U CN203640626U CN201320692569.XU CN201320692569U CN203640626U CN 203640626 U CN203640626 U CN 203640626U CN 201320692569 U CN201320692569 U CN 201320692569U CN 203640626 U CN203640626 U CN 203640626U
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Abstract
The utility model relates to a down-the-hole drill centering device which comprises an upper neck part, spiral centering wings and a lower neck part, and is characterized in that the axial length of the upper neck part is 50-58cm; the axial length of each spiral centering wing is 48-52cm; the axial length of the lower neck part is 42-47cm; the spiral centering wings are in closed right spiral structures; two symmetric semicircles are arranged at each spiral groove; and at least two PDC (polycrystalline diamond composite) sheets are mounted in a normal direction on the right side of an upper end spiral surface at the crown of each spiral centering wing. The centering device has the advantages that the problem and the defect of difficult back reaming in the conventional centering device drilling process can be solved and overcome; drill lifting during drilling and back reaming is avoided by decreasing wrap angles of the spiral surfaces and increasing the returning liquid passage area; back reaming operation can be performed at any time in a normal drilling operation process; the smoothness and the toughness of a well wall is kept; the probability of necking and collapse of the well wall is reduced; the safety of drilling operation is ensured; and the drilling operation cost is saved.
Description
Technical field
The utility model belongs to down-hole equipment technical field, particularly relates to a kind of down-hole equipment centralizer.
Background technology
In oilfield drilling, centralizer is the important component part of lower drilling tool structure, it can keep hole diameter and the borehole wall smooth, reduce the wearing and tearing of the borehole wall to drilling tool, that the position difference according to centralizer in drill string plays is respectively anti-oblique, the effect of well straightening and hold angle.In order to keep borehole size, wellbore stability and deflecting needs, when drillng operation, need on drill string, connect centralizer.In the time that a few km drilling tools are worked in well, often because of the reason such as hole shrinkage, distortion, cause freely activity of drilling tool, appearance can not put-on and delegated or the phenomenon of rotation, this is also the most common in drillng operation, the most incident down-hole engineering accident, cause drilling well claim for eot, strengthen operating cost.Therefore, in conventional drilling process, need back reaming operation, in order to keep wellbore stability, well track is round and smooth.Traditional centralising device for drilling tool lacks back reaming tooth, limited in one's ability to the borehole wall finishing when back reaming operation, easily causes talus deposit in centralizer upper end.In addition,, because the slurry channel area in centralizer outside is little, easily lift drilling tool, and then affect back reaming operation.The down-hole accident that the operation of existing centralizer back reaming causes, gently bit freezing, the heavy drilling tool well that falls, well landfill.
Summary of the invention
The utility model for solve the technical problem existing in known technology provide a kind of simple in structure, can increase substantially drillng operation efficiency, reduce operating risk and can reduce the down-hole equipment centralizer of back reaming operating cost.
The technical scheme that the utility model is taked for the technical problem existing in solution known technology is:
Down-hole equipment centralizer, comprise neck, the spiral righting wing and lower neck, described upper neck axial length is 50-58cm, described spiral righting wing axial length is 48-52cm, described lower neck axial length is 42-47cm, the described spiral righting wing adopts enclosed right hand helix structure, be respectively provided with two symmetrical semi arches, and helicoid right side, spiral righting wing bizet upper end normal direction is all equipped with at least 2 PDC composite sheet at described helical groove place.
The utility model can also adopt following technical scheme:
The spiral angle of the described spiral righting wing adopts the project organization that strengthens annular space flow channel for liquids area, and its spiral angle is 48-55 °.
Described spiral righting wing bizet adopts the narrow short structure of long 28-35cm, wide 60-68cm.
Advantage and the good effect that the utlity model has are: because the utility model adopts technique scheme, this centralizer not only can solve the problem and the drawback that in conventional centralizer drilling process, are difficult to carry out back reaming, by adopting less spiral angle, reduce the cornerite of helicoid, thereby increase returning fluid body aisle spare, the situation of lifting drilling tool not only can avoid creeping into time and when back reaming; But also can, in normal drilling operation course, can carry out at any time back reaming operation, and can keep the smooth and toughness of the borehole wall, reduce the borehole wall necking down probability that subsides, ensure the safety of drillng operation, save drillng operation cost.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the I portion enlarged drawing of Fig. 1;
Fig. 4 is conical surface hard alloy columnar layout structure schematic diagram under the utility model.
In figure: 1, box thread; 2, upper neck; 3, PDC composite sheet; 4, hard alloy columnar; 5, lower neck; 6, labeled slots; 7, the spiral righting wing; 8, male thread.
Detailed description of the invention
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1-Fig. 4, down-hole equipment centralizer, comprises the overall structure being made up of upper neck 2, the spiral righting wing 7 and lower neck 5.Described upper neck end button-type is 6-5/8 " box thread 1 of REG, box thread root is shaped with the labeled slots 6 of wide 20mm together; It is 6-5/8 that described lower neck end is shaped with button-type " male thread 8 of REG, pin thread thread root is shaped with the labeled slots 6 of wide 20mm together.
Described upper neck axial length is 50-58cm, described spiral righting wing axial length is 48-52cm, described lower neck axial length is 42-47cm, the described spiral righting wing adopts the little angle wrapping structure of enclosed right hand helix, respectively be provided with two symmetrical semi arches at described helical groove place, and helicoid right side, spiral righting wing bizet upper end normal direction is all equipped with at least 2 PDC composite sheet 3, described PDC composite sheet specification is Φ 11 × 8(mm), 30Du inclined-plane, each spiral righting wing upper end 5 the PDC composite sheet 3 that all distribute, ensure that it covers radially one week.Recessed 0～the 3mm of PDC composite sheet cutting teeth and spiral righting wing body and tooth post rear end will be welded with base body.In the present embodiment, described upper neck axial length is preferably 52.5cm, and described spiral righting wing axial length is preferably 51cm, and lower neck axial length is preferably 46.5cm.
In the present embodiment, under the described spiral righting wing, on the conical surface, be inlaid with hard alloy columnar 4, described hard alloy columnar hardness should be lower than HRC55, and hard alloy columnar adopts large density, proper alignment mode layout.
In the present embodiment, the spiral angle of the described spiral righting wing adopts the project organization that strengthens annular space flow channel for liquids area, and its spiral angle is 48-55 °.
Described spiral righting wing bizet adopts the narrow short structure of long 28-35cm, wide 60-68cm.In the present embodiment, the length of described spiral righting wing bizet is preferably 32cm, and width is preferably 66cm.
This centralizer not only can solve the difficult point and the drawback that in conventional centralizer drilling process, are difficult to back reaming, and the spiral righting wing, by adopting less spiral angle, has reduced the cornerite of helicoid, increases the flow area returning out, the situation of lifting drilling tool while avoiding creeping into; Same drilling assembly, the safety while not only having ensured drilling well, back reaming tooth also can be repaired the borehole wall in the time of back reaming, reduces back reaming operating risk, and therefore the development of this instrument and exploitation are very necessary and are badly in need of.
Claims (3)
1. a down-hole equipment centralizer, comprises neck, the spiral righting wing and lower neck, it is characterized in that; Described upper neck axial length is 50-58cm, described spiral righting wing axial length is 48-52cm, described lower neck axial length is 42-47cm, the described spiral righting wing adopts enclosed right hand helix structure, at least 2 PDC composite sheet are all equipped be respectively provided with two symmetrical semi arches at described helical groove place, and helicoid right side, spiral righting wing bizet upper end normal direction.
2. down-hole equipment centralizer according to claim 1, is characterized in that: the spiral angle of the described spiral righting wing adopts the project organization that strengthens annular space flow channel for liquids area, and its spiral angle is 48-55 °.
3. down-hole equipment centralizer according to claim 1, is characterized in that: described spiral righting wing bizet adopts the narrow short structure of long 28-35cm, wide 60-68cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320692569.XU CN203640626U (en) | 2013-11-05 | 2013-11-05 | Down-the-hole drill centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320692569.XU CN203640626U (en) | 2013-11-05 | 2013-11-05 | Down-the-hole drill centering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203640626U true CN203640626U (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320692569.XU Expired - Fee Related CN203640626U (en) | 2013-11-05 | 2013-11-05 | Down-the-hole drill centering device |
Country Status (1)
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| CN (1) | CN203640626U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265187A (en) * | 2014-09-05 | 2015-01-07 | 无锡中地地质装备有限公司 | Chambering drilling tool |
| CN107100557A (en) * | 2017-06-15 | 2017-08-29 | 贵州省地质矿产勘查开发局111地质大队 | Spiral wing centralizer for air down-the-hole hammer |
| CN108533180A (en) * | 2018-04-24 | 2018-09-14 | 中国海洋石油集团有限公司 | A kind of drilling engineering is with boring hole-drawing device and reaming method |
| CN108979542A (en) * | 2018-06-27 | 2018-12-11 | 中国海洋石油集团有限公司 | A kind of multistage fixed-wing reamer and its application method |
-
2013
- 2013-11-05 CN CN201320692569.XU patent/CN203640626U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265187A (en) * | 2014-09-05 | 2015-01-07 | 无锡中地地质装备有限公司 | Chambering drilling tool |
| CN107100557A (en) * | 2017-06-15 | 2017-08-29 | 贵州省地质矿产勘查开发局111地质大队 | Spiral wing centralizer for air down-the-hole hammer |
| CN108533180A (en) * | 2018-04-24 | 2018-09-14 | 中国海洋石油集团有限公司 | A kind of drilling engineering is with boring hole-drawing device and reaming method |
| CN108979542A (en) * | 2018-06-27 | 2018-12-11 | 中国海洋石油集团有限公司 | A kind of multistage fixed-wing reamer and its application method |
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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: 20140611 Termination date: 20151105 |
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| EXPY | Termination of patent right or utility model |