CN104514499A - Novel drill collar - Google Patents
Novel drill collar Download PDFInfo
- Publication number
- CN104514499A CN104514499A CN201310457385.XA CN201310457385A CN104514499A CN 104514499 A CN104514499 A CN 104514499A CN 201310457385 A CN201310457385 A CN 201310457385A CN 104514499 A CN104514499 A CN 104514499A
- Authority
- CN
- China
- Prior art keywords
- drill collar
- supporting seat
- lower contact
- novel
- drill
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/16—Drill collars
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/10—Correction of deflected boreholes
Abstract
The invention relates to a novel drill collar. The novel drill collar comprises a drill collar body and a lower drill collar joint which is internally connected with the lower end of the drill collar body; an outer pipe is arranged outside the drill collar body and the lower drill collar joint; a spring base sleeves the upper end of the lower drill collar joint and the cylindrical stepped surface of the lower drill collar joint; steps formed inside the outer pipe are supported by the upper end surface of a spring; a supporting base is welded at the lower end of the lower drill collar joint; an axial through hole is formed in the supporting base; a gravity rod is arranged above the supporting base. According to the novel drill collar, the structure is simple, the manufacturing cost is low, the vibration can be reduced in the drilling process so as to reduce the harm to the drilling engineering due to the vibration of a drill string and improve the drilling efficiency, and the inclination prevention and correction can be effectively performed on a drill bit due to the gravity rod which is added into the lower drill collar joint.
Description
Technical field
The present invention relates to a kind of novel drill collar, belong 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 in, one is apply the pressure of the drill to drill bit; Two is the necessary intensity under guarantee contractive condition; Three be alleviate drill bit vibration, swing and beat, make bit operation steady; Four is control hole deviation.Due to shaft bottom and the excitation of drill bit interphase interaction and the impact of other vibration source in drilling process, make drill string in well produce larger vibration, the vibration of drill string is reduce drilling efficiency to the impact that drilling engineering brings, and drilling cost is increased; But also hole deviation phenomenon can occur in drilling process, hole deviation brings a series of harm to the operation such as drilling well, completion, and brings about great losses.Deviation control with drilling straight well technology is oil drilling key technology.Hole deviation problem is repeatedly there is in drilling well, domestic use more except pendulum assembly and the anti-oblique well straightening technology of packed hole assembly, develop off-axis drilling tool, helicoid hydraulic motor has coordinated the anti-oblique well straightening technology of PDC drill bit etc., expanding again the application that VDS, SDD, VertiTrak, PowerV etc. have the automation hole deviation closed-loop control system of initiatively anti-oblique ability in recent years, serving the effect for there being anti-oblique well straightening when creeping in the situation such as high-dip structure, tomography to a certain extent.But the anti-oblique well straightening complicated structure of above drill bit, and manufacturing cost is high.
Summary of the invention
For above-mentioned defect, the object of the present invention is to provide a kind of structure simple, low cost of manufacture, can vibration damping in drilling process, improve drilling efficiency, and effectively can carry out the novel drill collar of one of anti-oblique well straightening to drill bit.
The technical solution adopted in the present invention is for this reason:
Comprise drill collar body and the interior drill collar lower contact being connected to drill collar body lower end, an outer tube is provided with outside drill collar body and drill collar lower contact, drill collar lower contact upper end cover has a spring base on drill collar lower contact cylindrical step surface, spring upper end face supports the step of outer tube, drill collar lower contact is welded with supporting seat in lower end, be provided with axially extending bore in supporting seat, above supporting seat, be provided with gravity rod.
Described gravity rod lower surface is sphere, and described spherical diameter is greater than the through-hole diameter of supporting seat.
Be provided with gap between described supporting seat upper end periphery and drill collar lower contact inwall, the upper end periphery of supporting seat is provided with some side openings and communicates with through hole.
Advantage of the present invention is:
Structure of the present invention is simple, low cost of manufacture, can vibration damping in drilling process, to reduce the harm because drillstring vibrations brings to drilling engineering, improving drilling efficiency, by setting up gravity rod in the inside of drill collar lower contact, effectively can carry out anti-oblique well straightening to drill bit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, 1 be drill collar body, 2 are drill collar lower contacts, 3 are outer tubes, 4 are springs, 5 are supporting seats, 6 are through holes, 7 are gravity rods, 8 is side openings.
Detailed description of the invention
A kind of novel drill collar, comprise drill collar body 1 and the interior drill collar lower contact 2 being connected to drill collar body 1 lower end, an outer tube 3 is provided with outside drill collar body 1 and drill collar lower contact 2, drill collar lower contact 2 upper end cover has 4, a spring on drill collar lower contact 2 cylindrical step surface, spring 4 upper surface supports the step of outer tube 3 inside, drill collar lower contact 2 is welded with supporting seat 5 in lower end, is provided with axially extending bore 6 in supporting seat 5, is provided with gravity rod 7 above supporting seat 5.
Gravity rod 7 lower surface of the present invention is sphere, and described spherical diameter is greater than through hole 6 diameter of supporting seat 5.
Be provided with gap between supporting seat 5 upper end periphery of the present invention and drill collar lower contact 2 inwall, the upper end periphery of supporting seat 5 is provided with some side openings 8 and communicates with through hole 6.
Claims (3)
1. a novel drill collar, it is characterized in that, comprise drill collar body and the interior drill collar lower contact being connected to drill collar body lower end, an outer tube is provided with outside drill collar body and drill collar lower contact, drill collar lower contact upper end cover has a spring base on drill collar lower contact cylindrical step surface, and spring upper end face supports the step of outer tube, and drill collar lower contact is welded with supporting seat in lower end, be provided with axially extending bore in supporting seat, above supporting seat, be provided with gravity rod.
2. the novel drill collar of one according to claim 1, is characterized in that, described gravity rod lower surface is sphere, and described spherical diameter is greater than the through-hole diameter of supporting seat.
3. the novel drill collar of one according to claim 1, is characterized in that, is provided with gap between described supporting seat upper end periphery and drill collar lower contact inwall, and the upper end periphery of supporting seat is provided with some side openings and communicates with through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310457385.XA CN104514499A (en) | 2013-09-30 | 2013-09-30 | Novel drill collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310457385.XA CN104514499A (en) | 2013-09-30 | 2013-09-30 | Novel drill collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104514499A true CN104514499A (en) | 2015-04-15 |
Family
ID=52790326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310457385.XA Pending CN104514499A (en) | 2013-09-30 | 2013-09-30 | Novel drill collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104514499A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11248423B2 (en) | 2019-06-30 | 2022-02-15 | Halliburton Energy Service, Inc. | Drilling tool with thread profile |
-
2013
- 2013-09-30 CN CN201310457385.XA patent/CN104514499A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11248423B2 (en) | 2019-06-30 | 2022-02-15 | Halliburton Energy Service, Inc. | Drilling tool with thread profile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150415 |
|
| WD01 | Invention patent application deemed withdrawn after publication |