CN2228970Y - Combined drill collar device - Google Patents
Combined drill collar device Download PDFInfo
- Publication number
- CN2228970Y CN2228970Y CN 95219480 CN95219480U CN2228970Y CN 2228970 Y CN2228970 Y CN 2228970Y CN 95219480 CN95219480 CN 95219480 CN 95219480 U CN95219480 U CN 95219480U CN 2228970 Y CN2228970 Y CN 2228970Y
- Authority
- CN
- China
- Prior art keywords
- drill collar
- central tube
- pressure
- utility
- forcing pipe
- 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 - Fee Related
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Abstract
The utility model relates to a combined drill collar device used in industries of petroleum and ground ore exploration and well drilling, which can not be bent by pressure. The combined drill collar device is composed of a center pipe 1, a double half clamping ring 2, an axial spacing joint 3, a compression tube 4, sealing members 5, 7, 8, a drill collar 6, a centralizer 9, an integral key 10, a hollow cavity 11, a through hole 12, and a side hole 13. Through the proving of theoretical analyses, a hollow pressure rod with a tension rod in the middle can not be bent no matter how large the pressure rod bears, and the utility model realizes the characteristic structurally. By adopting the drill collar 6 as the hollow pressure rod and the compression pipe 4 as the tension rod, the utility model can not be bent under any drilling pressure and is a novel slope preventing straight drilling tool used in wells.
Description
The utility model relates to the not curved combination drill collar device of pressure that a kind of oil drilling industry is used, and belongs to oil and mine prospection drilling machinery technical field.
The common drill collar that China uses divides homemade drill collar and API drill collar, the employing API drill collar standard that homemade drill collar is equal to, it is a global facility, there are public affairs and box thread in two ends, though it is simple in structure, but under deadweight and the effect of the pressure of the drill brill, can produce first order buckling and second order buckling, cause the hole deviation phenomenon, not meet the technology and the technological requirement of drilling straight-hole.
The purpose of this utility model provides a kind of not curved combination drill collar device of pressure of novel structure, as long as the material stress of drill collar does not reach yield limit, and length is no more than the critical length that deadweight produces flexing down, then this drill collar can not produce bending under any the pressure of the drill, to prevent to produce hole deviation, be a kind of brand-new anti-straight down-hole equipment of tiltedly looking for.
The utility model is achieved in that the not curved combination drill collar device of pressure is by central tube 1, two half snap rings 2, axial limiting joint 3, forcing pipe 4, seal 5,7,8, drill collar 6 and centralizer 9 are formed, the total weight of its top drill collar 6 passes to central tube 1 by the top connection on central tube 1 top, two half snap ring, 2 centering pipes 1 are middle with axial limiting joint 3, have the circular hole 12 of a up/down perforation on the central axis of central tube 1, connect by spline 10 between the endoporus on central tube 1 and drill collar 6 tops, adopt thread connection between drill collar 6 top cylindrical end faces and the axial limiting joint 3, leave the cavity 11 of a dress hydraulic oil between central tube 1 and the forcing pipe 4, and seal with seal 5 and 7.Topping bar of forcing pipe 4 acts on the upper surface of drill collar 6, side opening 13 is arranged at drill collar 6 bottoms, dead space between forcing pipe 4 bottoms and drill collar can be communicated with the drill collar outside, central tube 1 lower end is stretched in the lower thread joint of drill collar 6, and drill collar 6 upper and lower sides are equipped with centralizer 9.
Advantage of the present utility model is in drilling process no matter add great the pressure of the drill, and this drill collar can be crooked, prevents hole deviation effectively, improved the requirement of drilling straight-hole.
Below in conjunction with accompanying drawing, the utility model is further described:
Fig. 1 is a structural representation sketch of the present utility model;
Shown in Fig. 1,1-central tube, two half snap rings of 2-, 3-axial limiting joint, 4-forcing pipe, 5-seal, 6-drill collar, 7-seal, 8-seal, 9-centralizer, 10-spline, 11-hydraulic oil cavity, 12-through hole, 13-side opening.
Its design principle is as follows: the drill string (mainly being made up of drill collar and part weighted lever) of nearly drill bit is actually one and bears the depression bar of axial compression, depresses at wammel to become bent.Learn that from the deviation control with drilling straight well theory analysis its axis bending is healed better little, optimal situation is that wammel is depressed axis and also do not bent,
The utility model is in structure design, satisfied above-mentioned theory, the total weight of its top drill collar 6 passes to central tube 1 by the top connection on central tube 1 top, two half snap ring, 2 centering pipes 1 are middle with axial limiting joint 3, have the circular hole 12 of a up/down perforation on the central axis of central tube 1, connect by spline 10 between the endoporus on central tube 1 and drill collar 6 tops, adopt thread connection between drill collar 6 top cylindrical end faces and the axial limiting joint 3, leave the cavity 11 of a dress hydraulic oil between central tube 1 and the forcing pipe 4, and seal with seal 5 and 7.Topping bar of forcing pipe 4 acts on the upper surface of drill collar 6, side opening 13 is arranged at drill collar 6 bottoms, dead space between forcing pipe 4 bottoms and drill collar can be communicated with the drill collar outside, central tube 1 lower end is stretched in the lower thread joint of drill collar 6, and drill collar 6 upper and lower sides are equipped with centralizer 9.
Its operating principle of the utility model is as follows: top drill collar 6 is connected with the top connection of central tube 1, makes the total weight (major part of the pressure of the drill) of top drill collar pass to central tube 1.Owing between central tube 1 and the forcing pipe 4 seal 5 and 7 are arranged, therefore, central tube 1 is actually the pressurization of the hydraulic oil in the cavity 11 when pressing down, and the hydraulic oil in the cavity 11 has equivalently passed to this pressure forcing pipe 4 bottoms again.Topping bar of forcing pipe 4 acts on the upper surface of drill collar 6, so the pulling force of forcing pipe 4 bottoms has become the pressure of drill collar 6 upper ends.This structure meets fully to pressing the not mathematics mechanical condition of curved hollow rod member.Drill collar 6 is equivalent to hollow rod member, and forcing pipe 4 is equivalent to " stayed mast ", and therefore, the utility model is the not curved drill collar structure of a pressure.
Claims (1)
1. a pressure is not bent the combination drill collar device, by central tube (1), two half snap rings (2), axial limiting joint (3), forcing pipe (4), seal (5), (7), (8), drill collar (6), centralizer (9), spline (10), cavity (11), side opening (12) constitutes, it is characterized in that: the total weight of drill collar (6) passes to central tube (1) by the top connection on central tube (1) top, two half snap rings (2) centering pipes (1) are middle with axial limiting joint (3), have the circular hole (12) of a up/down perforation on the central axis of central tube (1), connect by spline (10) between the endoporus on central tube (1) and drill collar (6) top, adopt thread connection between drill collar (6) top cylindrical end face and the axial limiting joint (3), leave the cavity (11) of a dress hydraulic oil between central tube (1) and the forcing pipe (4), and with seal (5) and (7) sealing, topping bar of forcing pipe (4) acts on the upper surface of drill collar (6), side opening (13) is arranged at drill collar (6) bottom, dead space between forcing pipe (4) bottom and drill collar (6) can be communicated with drill collar (6) outside, central tube (1) lower end is stretched in the lower thread joint of drill collar (6), and drill collar (6) upper and lower side is equipped with centralizer (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95219480 CN2228970Y (en) | 1995-08-18 | 1995-08-18 | Combined drill collar device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95219480 CN2228970Y (en) | 1995-08-18 | 1995-08-18 | Combined drill collar device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2228970Y true CN2228970Y (en) | 1996-06-12 |
Family
ID=33867672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95219480 Expired - Fee Related CN2228970Y (en) | 1995-08-18 | 1995-08-18 | Combined drill collar device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2228970Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029936A (en) * | 2019-04-23 | 2019-07-19 | 西南石油大学 | A kind of injection pressure formula bilayer drill string deviation control with drilling straight well drilling tool |
| CN113250639A (en) * | 2020-08-28 | 2021-08-13 | 中国海洋石油集团有限公司 | High-torsion-resistance back-off fishing pipe column and fishing method and application thereof |
-
1995
- 1995-08-18 CN CN 95219480 patent/CN2228970Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029936A (en) * | 2019-04-23 | 2019-07-19 | 西南石油大学 | A kind of injection pressure formula bilayer drill string deviation control with drilling straight well drilling tool |
| CN110029936B (en) * | 2019-04-23 | 2020-06-30 | 西南石油大学 | Injection-type double-layer drill string anti-deviation straight drilling tool |
| CN113250639A (en) * | 2020-08-28 | 2021-08-13 | 中国海洋石油集团有限公司 | High-torsion-resistance back-off fishing pipe column and fishing method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |