CN203531789U - Novel deviation-preventing and deviation-correcting drill collar - Google Patents
Novel deviation-preventing and deviation-correcting drill collar Download PDFInfo
- Publication number
- CN203531789U CN203531789U CN201320609477.0U CN201320609477U CN203531789U CN 203531789 U CN203531789 U CN 203531789U CN 201320609477 U CN201320609477 U CN 201320609477U CN 203531789 U CN203531789 U CN 203531789U
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- CN
- China
- Prior art keywords
- deviation
- drill collar
- correcting
- supporting base
- hole
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Abstract
The utility model relates to a novel deviation-preventing and deviation-correcting drill collar. The novel deviation-preventing and deviation-correcting drill collar comprises a drill collar body with the lower end internally welded with a supporting base, the supporting base is internally provided with an axial through hole, a deviation-correcting gravity bar above the supporting base is located inside the drill collar body, annular space is arranged between the circumferential face at the upper end of the supporting base and the inner wall of the drill collar body, and the circumference of the supporting base is provided with a plurality of side holes communicated with the through hole and the annular space. The novel deviation-preventing and deviation-correcting drill collar is simple in structure and low in manufacturing cost, the deviation-correcting gravity bar is additionally arranged inside the drill collar body and can effectively carry out deviation preventing and deviation correcting on a drill bit, the side holes are additionally formed in the circumference of the supporting base, the through hole of the supporting base is communicated with the annular space, the deviation-correcting gravity bar can be prevented from blocking the through hole, and the resistance produced when the water flows can be effectively reduced.
Description
Technical field
The utility model relates to novel anti-oblique well straightening drill collar, belongs to drilling well down-hole equipment technical field.
Background technology
Drill collar is in the foot of drill string, is the chief component of bottomhole assembly.There is larger gravity and rigidity.Drill collar in drilling process main rise following aspect, the one, to drill bit, apply the pressure of the drill; The 2nd, guarantee the necessary intensity under contractive condition; The 3rd, alleviate drill bit vibration, swing and beat, make drill bit stable working; The 4th, control hole deviation.The factor that affects hole deviation in drilling process is a lot, and hole deviation brings a series of harm to operations such as drilling well, completions, and brings about great losses.The anti-oblique well straightening technology of beating is key technology of oil drilling.For repeatedly occurring hole deviation problem in drilling well, domestic use more except pendulum assembly and the anti-oblique well straightening technology of packed hole assembly, off-axis drilling tool, the anti-oblique well straightening technology of helicoid hydraulic motor cooperation PDC drill bit etc. have been developed, expand again in recent years VDS, SDD, VertiTrak, PowerV etc. and there is the initiatively application of the automation hole deviation closed-loop control system of anti-oblique ability, played to a certain extent the effect that has anti-oblique well straightening when suddenly constructing, creeping in the situation such as tomography for height.But the anti-oblique well straightening complicated structure of above drill bit, and manufacturing cost is high, and can stop up drill collar hydrophthalmia.
Utility model content
For above-mentioned defect, it is a kind of simple in structure that the purpose of this utility model is to provide, and low cost of manufacture can effectively be carried out anti-oblique well straightening to drill bit, reduces the novel anti-oblique well straightening drill collar of the resistance that water flow is subject to.
The technical scheme that the utility model adopts is for this reason:
Comprise drill collar body, described drill collar body is welded with supporting seat in lower end, in supporting seat, be provided with axially extending bore, supporting seat top is provided with well straightening gravity rod and is positioned at drill collar body, between supporting seat upper end periphery and drill collar body inwall, be provided with annular space, supporting seat circumference is provided with some side openings and communicates with through hole and annular space.
Described well straightening gravity rod lower end is hemisphere, and described hemispheroidal diameter is greater than through-hole diameter.
The utility model has the advantages that:
The utility model is simple in structure, and low cost of manufacture, by setting up well straightening gravity rod in the inside of drill collar body, can effectively be carried out anti-oblique well straightening to drill bit; By set up some side openings on supporting seat circumference, supporting seat through hole is communicated with annular space, prevent that well straightening gravity rod from stopping up through hole, the resistance being subject to while effectively reducing water flow.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1 is drill collar body, the 2nd, supporting seat, the 3rd, through hole, the 4th, well straightening gravity rod, the 5th, annular space, the 6th, side opening, the 7th, hemisphere.
The specific embodiment
Novel anti-oblique well straightening drill collar, comprise drill collar body 1, described drill collar body is welded with supporting seat 2 in 1 lower end, in supporting seat 2, be provided with axially extending bore 3, supporting seat 2 tops are provided with well straightening gravity rod 4 and are positioned at drill collar body 1, between supporting seat 2 upper end peripheries and drill collar body 1 inwall, be provided with annular space 5, supporting seat 2 circumference are provided with some side openings 6 and communicate with through hole 3 and annular space 5.
Well straightening gravity rod described in the utility model 4 lower ends are hemisphere 7, and the diameter of described hemisphere 7 is greater than through hole 3 diameters.
Claims (2)
1. novel anti-oblique well straightening drill collar, comprise drill collar body, it is characterized in that, described drill collar body is welded with supporting seat in lower end, in supporting seat, be provided with axially extending bore, supporting seat top is provided with well straightening gravity rod and is positioned at drill collar body, between supporting seat upper end periphery and drill collar body inwall, is provided with annular space, and supporting seat circumference is provided with some side openings and communicates with through hole and annular space.
2. novel anti-oblique well straightening drill collar according to claim 1, is characterized in that, described well straightening gravity rod lower end is hemisphere, and described hemispheroidal diameter is greater than through-hole diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320609477.0U CN203531789U (en) | 2013-09-30 | 2013-09-30 | Novel deviation-preventing and deviation-correcting drill collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320609477.0U CN203531789U (en) | 2013-09-30 | 2013-09-30 | Novel deviation-preventing and deviation-correcting drill collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203531789U true CN203531789U (en) | 2014-04-09 |
Family
ID=50418011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320609477.0U Expired - Fee Related CN203531789U (en) | 2013-09-30 | 2013-09-30 | Novel deviation-preventing and deviation-correcting drill collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203531789U (en) |
-
2013
- 2013-09-30 CN CN201320609477.0U patent/CN203531789U/en not_active Expired - Fee Related
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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: 20140409 Termination date: 20150930 |
|
| EXPY | Termination of patent right or utility model |