CN2570444Y - Non-rotating centralizer - Google Patents
Non-rotating centralizer Download PDFInfo
- Publication number
- CN2570444Y CN2570444Y CN 02272188 CN02272188U CN2570444Y CN 2570444 Y CN2570444 Y CN 2570444Y CN 02272188 CN02272188 CN 02272188 CN 02272188 U CN02272188 U CN 02272188U CN 2570444 Y CN2570444 Y CN 2570444Y
- Authority
- CN
- China
- Prior art keywords
- mandrel
- supporting positive
- positive cover
- gland
- bearing
- 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 non-rotating type centralizer. A centralizing sleeve [10] is connected with a core shaft [1] by a bearing [7] and balls [9], a sealing sleeve [6], a gland [5], and end covers [3] are arranged in the external direction of the bearing [7], wherein, the sealing sleeve [6] and the gland [5] are respectively provided with an annular groove, a sealing ring [11] is arranged in each annular groove, the end covers [3] are arranged at the two ports of the centralizing sleeve [10], and uniformly distributed spiral diversion grooves [13] are arranged on the excircle of the centralizing sleeve [10]. The utility model has the advantages of reasonable design, high integral strength, good sealing performance, long service life, strong adaptability to job environments, and reduced hidden danger of the accidents of clamped drills. The utility model is suitable for popularization and application in various oil fields and gas fields.
Description
Technical field
The utility model relates to a kind of well drilling centralizer, the non-rotating centralizer that particularly a kind of drilling rod that is used in oil field, gas field exploration, the exploitation is set upright.
Background technology
In the prior art, stile is the aid that is applied to down-hole drilling operation, playing a part drilling rod sets upright, because centralizer is in work under the comparison rugged environment for a long time, the good and bad application life and the operating efficiency of directly influencing of its structure, be used for the oil field, gas field exploration, the stile of exploitation aspect mainly contains two kinds, a kind of rotation, along with drilling well drilling bar rotates together, when centralizer contacts with the borehole wall, be subjected to the influence of moment of friction, the borehole wall produces rotation torque to centralizer, the accident potential that bit freezing can occur, and can cause damage to the borehole wall or sleeve pipe; Another kind is non-rotating, and its supporting positive cover and mandrel can be made relative rotary motion, when supporting positive cover is subjected to influencing of moment of friction, supporting positive cover can keep not changeing, and mandrel can be rotated further with drilling rod, in the time of can avoiding rotating because of drilling rod the borehole wall or sleeve pipe is caused damage, but because of its design unreasonable, poor sealing, in use, easily by unclean corroded by liquid centralizer internal component, influence the normal operation of centralizer, cause inefficiency, application life is short, has increased cost of production.
Summary of the invention
The purpose of this utility model is to provide a kind of improved non-rotating centralizer for the shortcoming that overcomes above-mentioned prior art, optimizes its structure, improves sealing and drilling rod and sets upright effect, reduces the accident potential of bit freezing, improves drilling well operating efficiency and quality.
The purpose of this utility model realizes by following technical measures: this centralizer has mandrel and supporting positive cover, mandrel is a hollow shaft, two ends are nipple, be used for jointed rod, the outer suit of mandrel supporting positive cover, stretch out outside the supporting positive cover at the mandrel two ends, the interior boring ratio mandrel cylindrical of supporting positive cover is big, between supporting positive cover and the mandrel by bearing, ball connects, can relatively rotate, the extroversion of bearing is provided with sealing shroud, sealing shroud and supporting positive cover, the contact surface of mandrel offers cannelure, be provided with sealing ring in the cannelure, the extroversion of sealing shroud is being pressed gland, and the contact surface of gland and mandrel is provided with cannelure, is provided with sealing ring in the cannelure, be provided with end cap in the supporting positive cover two-port, end cap is fixed on the mandrel.By the multilayer isolating seal, prevent filth and sea water intrusion centralizer internal component, on the gland set screw can be housed, to improve fiting effect and sealing effectiveness, to guarantee relatively rotating of supporting positive cover and mandrel,, can establish the spiral stream guidance groove on the supporting positive cover surface for improving the cleaning efficiency of shaft bottom drilling cuttings.During use, two joints of centralizer are connected drilling rod, centralizer rotates with drilling well drilling bar, when centralizer contacted with the borehole wall, the borehole wall produced rotation torque to centralizer, and the supporting positive cover in the centralizer is subjected to the effect of moment of friction, keep not changeing, and drilling rod and mandrel are rotated further, thereby have reduced drilling rod and the contacted moment of friction loss of the borehole wall, have improved the driving efficient of rig greatly.
The utility model is reasonable in design, simple in structure, improve drilling rod and set upright effect, thereby improved underground work quality, its bulk strength height, good seal performance, long service life, strong to operating environment compliance, can reduce the accident potential of bit freezing, improve the drilling well operating efficiency, suit to apply in various oil fields, gas field.
Description of drawings
Fig. 1 is a structure chart of the present utility model.
The specific embodiment
With reference to Fig. 1, this centralizer is provided with mandrel [1] and supporting positive cover [10], mandrel [1] is a hollow shaft, supporting positive cover [10] is sleeved on mandrel [1] cylindrical, stretch out outside the supporting positive cover [10] at mandrel [1] two ends, one end is male connection [2], the other end is female adapter [12], connect by bearing and ball between supporting positive cover [10] and the mandrel [1] and cooperate, the interior circle of supporting positive cover [10] is provided with circular ball grooves, bearing holder (housing, cover) [8], the cylindrical correspondence of mandrel [1] is provided with circular ball grooves, needle bearing [7], circular ball grooves is located on the inwall medium position of supporting positive cover [10], be covered with ball [9] in the ball grooves, ball [9] can be in ball grooves circulating rolling, in circular ball grooves two outsides, to supporting positive cover [10] two-port direction bearing holder (housing, cover) [8] is housed successively, sealing shroud [6], gland [5], be provided with needle bearing [7] in the bearing holder (housing, cover) [8], on the cylindrical of sealing shroud [6] and in the endoporus and the endoporus of gland [5] all have cannelure, be provided with sealing ring [11] in the cannelure, the gland at two ends [5] is pushed down bearing holder (housing, cover) [8], sealing shroud [6], gland [5] is provided with set screw, with regulating shaft bearing sleeve [8], the cooperation of sealing shroud [6], on the cylindrical of supporting positive cover [10], be provided with equally distributed spiral stream guidance groove [13], to improve the cleaning efficiency of shaft bottom drilling cuttings, reduce the accident potential of bit freezing, supporting positive cover can be located by the baffle ring [4] that is provided with at the axial float of mandrel, and baffle ring [4] is enclosed within the groove of mandrel [1] cylindrical, is fixed by screw by end cap [3], labyrinth seal is played just in time in the two-port of supporting positive cover in the position of end cap installing.
Claims (1)
1, a kind of non-rotating centralizer, mandrel [1] is arranged, supporting positive cover [10], female adapter [12], male connection [2], it is characterized in that between supporting positive cover [10] and the mandrel [1] by bearing [7], ball [9] connects, the extroversion of bearing [7] is provided with sealing shroud [6], sealing shroud and supporting positive cover, the contact surface of mandrel offers cannelure, be provided with sealing ring [11] in the cannelure, the extroversion of sealing shroud is pressed with gland [5], gland [5] is provided with cannelure with the contact surface of mandrel [1], be provided with sealing ring [11] in the cannelure, be respectively equipped with end cap [3] in supporting positive cover [10] two-port, end cap [3] is fixed on the mandrel [1], is provided with equally distributed spiral stream guidance groove [13] on the cylindrical of supporting positive cover [10].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02272188 CN2570444Y (en) | 2002-07-30 | 2002-07-30 | Non-rotating centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02272188 CN2570444Y (en) | 2002-07-30 | 2002-07-30 | Non-rotating centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2570444Y true CN2570444Y (en) | 2003-09-03 |
Family
ID=33736923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02272188 Expired - Fee Related CN2570444Y (en) | 2002-07-30 | 2002-07-30 | Non-rotating centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2570444Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643903A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Inside and outside centering guide for well repair in oil field |
| CN108612490A (en) * | 2016-12-12 | 2018-10-02 | 四川煜天石油机械设备有限公司 | A kind of oil pumping pipeline rotary centralizer |
| CN109236201A (en) * | 2018-10-30 | 2019-01-18 | 中国石油天然气股份有限公司 | centralizer |
-
2002
- 2002-07-30 CN CN 02272188 patent/CN2570444Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643903A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Inside and outside centering guide for well repair in oil field |
| CN108612490A (en) * | 2016-12-12 | 2018-10-02 | 四川煜天石油机械设备有限公司 | A kind of oil pumping pipeline rotary centralizer |
| CN109236201A (en) * | 2018-10-30 | 2019-01-18 | 中国石油天然气股份有限公司 | centralizer |
| CN109236201B (en) * | 2018-10-30 | 2020-05-08 | 中国石油天然气股份有限公司 | Centering guide |
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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 |