CN202718638U - Superlow-resistance ball sleeve centering device - Google Patents
Superlow-resistance ball sleeve centering device Download PDFInfo
- Publication number
- CN202718638U CN202718638U CN 201220380739 CN201220380739U CN202718638U CN 202718638 U CN202718638 U CN 202718638U CN 201220380739 CN201220380739 CN 201220380739 CN 201220380739 U CN201220380739 U CN 201220380739U CN 202718638 U CN202718638 U CN 202718638U
- Authority
- CN
- China
- Prior art keywords
- steel ball
- steel
- centralizer
- centering device
- main body
- 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 discloses a superlow-resistance ball sleeve centering device which comprises a centering device main body (1). A steel ball groove (2) is arranged on the outer wall of the centering device main body (1). Steel balls (3) are arranged in the steel ball groove (2). An anti-disengaging baffle (5) is arranged on the periphery of an excircle of the steel ball groove (2). A steel ball hole (6) is arranged at the center of the anti-disengaging baffle (5). The outer surfaces of the steel balls (3) protrude out of the outer surface of the anti-disengaging baffle (5). The superlow-resistance ball sleeve centering device has the advantages of improving sliding friction in the prior art to rolling friction, greatly decreasing frictional resistance between the centering device and a well wall, effectively ensuring descending smoothness and security of a casing, and being high in operation reliability of the device.
Description
Technical field
The utility model relates to technical field of petroleum extraction, particularly a kind of low-resistance ball casing centralizer.
Background technology
Casing stabbing board is to guarantee that sleeve pipe goes into the well in the process, guarantees casing centralization, promotes the critical component of cementing quality.Sleeve pipe at lower going-into-well at the moment since various factors can off center the position, casing stabbing board guarantees that exactly sleeve pipe occupy the oculocentric device of well all the time.
Traditional casing stabbing board is the effect that reaches the righting sleeve pipe by the righting strip on the centralizer or roller and contacting of the borehole wall, but the friction of the righting strip of centralizer and the borehole wall is very large, many times can hinder going into the well smoothly of sleeve pipe, more serious meeting makes sleeve pipe stuck, causes the accident; Although and the casing stabbing board of roller type has reduced sliding friction, because roller is to be welded on the righting strip by a very thin bearing pin, so rock when excessive when sleeve pipe, probably cause the bearing pin fracture, fall into the interior stuck sleeve pipe of well, cause the accident.Simultaneously because the slit between roller and the bearing pin is very large, in the process of going into the well because the situation that roller can't rotate can occur, so that roller loses rolling effect in entering of the dirts such as mud of the borehole wall.
Therefore in sleeve pipe is gone into the well process, installs one safe and reliable, righting is effective, energy so that the centralizer that sleeve pipe is gone into the well smoothly be necessary.
The utility model content
The purpose of this utility model is to overcome the shortcoming of prior art, provides that a kind of frictional resistance is minimum, reliability is high, can strengthen the low-resistance ball casing centralizer of petroleum casing pipe righting effect.
The purpose of this utility model is achieved through the following technical solutions: low-resistance ball casing centralizer, it comprises the centralizer main body, be distributed with steel bead groove on the outer wall of centralizer main body, be provided with steel ball in the steel bead groove, the centralizer main body is positioned at the steel bead groove outer circumference portion anticreep baffle plate is installed, the center of anticreep baffle plate is provided with the steel ball hole, and steel ball can protrude from by the steel ball hole at baffle plate center the external surface of anticreep baffle plate.
Be filled with several little steel balls in the space between steel ball and steel bead groove inwall.
The utlity model has following advantage:
1. the utility model is installed the steel ball that can roll in the centralizer main body, so that centralizer is in work, the place that contact with the borehole wall is the external surface of steel ball, and the point that of the prior art contact or line contact are similar to instead contacts.
2. owing to the rolling of steel ball, the utility model is improved to rolling friction with sliding friction of the prior art, has greatly reduced the frictional resistance of centralizer and the borehole wall, has guaranteed that effectively sleeve pipe is gone into the well smooth and easy, has guaranteed simultaneously the safety that sleeve pipe is gone into the well.
Even 3 sleeve pipes shake in the process of going into the well, so that centralizer and the borehole wall bump, its colliding part should be the external surface of steel ball, and this impact force is passed to the centralizer that is fixed on the sleeve pipe again by steel ball, thereby make sleeve pipe return to the center, reach the righting effect, simultaneously since the part that centralizer contacts with steel ball certain thickness, the situation generation that can avoid steel ball to come off arranged.
4, the utility model is filled with several little steel balls in the space between steel ball and steel bead groove inwall, according to the operating principle of multi-directional ball, can guarantee that steel ball rolls smooth and easy, stuck phenomenon can not occur, and the device functional reliability is high.
Description of drawings
Fig. 1 is structural representation of the present utility model
Fig. 2 is off working state schematic diagram of the present utility model
Fig. 3 is working state schematic representation of the present utility model
Among the figure, 1-centralizer main body, 2-steel bead groove, 3-steel ball, 4-baffle plate groove, 5-anticreep baffle plate, 6-steel ball hole, the little steel ball of 7-, A-contact point, f-force of rolling friction.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described, protection domain of the present utility model is not limited to the following stated:
As shown in Figure 1, low-resistance ball casing centralizer, it comprises centralizer main body 1, be distributed with steel bead groove 2 on the outer wall of centralizer main body 1, be provided with steel ball 3 in the steel bead groove 2, centralizer main body 1 is positioned at steel bead groove 2 outer circumference portion and is provided with baffle plate groove 4, anticreep baffle plate 5 is installed in the baffle plate groove 4, the center of anticreep baffle plate 5 is provided with steel ball hole 6, the diameter in steel ball hole 6 is less than the diameter of steel ball 3, the external surface of steel ball 3 protrudes from the external surface of anticreep baffle plate 5, and anticreep baffle plate 5 can prevent that steel ball 3 from coming off, and is filled with several little steel balls 7 in the space between steel ball 3 and steel bead groove 2 inwalls.
The course of work of the present utility model is as follows: centralizer is set in outside of sleeve, and as shown in Figure 2, when not shaking in sleeve pipe is being gone into the well process, when namely steel ball 3 was off working state, steel ball 3 did not contact with the borehole wall, can not cause lower well resistance to sleeve pipe.As shown in Figure 3, when in sleeve pipe is being gone into the well process, shaking, be that steel ball 3 is during for duty, steel ball 3 contacts at contact point A place with the borehole wall, produce a force of rolling friction f, so principle according to rolling friction, steel ball 3 can ceaselessly roll in the process that sleeve pipe is gone into the well, thereby so that the frictional force of centralizer and the borehole wall significantly reduces, guaranteed that sleeve pipe is gone into the well smooth and easy, even centralizer and the borehole wall bump, its colliding part should be the external surface of steel ball 3, and this impact force is passed to the centralizer that is fixed on the sleeve pipe again by steel ball 3, thereby make sleeve pipe return to the center, reach the righting effect, strengthened the righting effect of petroleum casing pipe with centralizer, improved reliability and cementing quality that sleeve pipe is gone into the well.
Be filled with several little steel balls 7 in the space between steel ball 3 and steel bead groove 2 inwalls, according to the operating principle of multi-directional ball, can guarantee that steel ball 3 rolls smooth and easy, stuck phenomenon can not occur, the device functional reliability is high.
Claims (2)
1. low-resistance ball casing centralizer, it is characterized in that: it comprises centralizer main body (1), be distributed with steel bead groove (2) on the outer wall of centralizer main body (1), be provided with steel ball (3) in the steel bead groove (2), centralizer main body (1) is positioned at steel bead groove (2) outer circumference portion anticreep baffle plate (5) is installed, the center of anticreep baffle plate (5) is provided with steel ball hole (6), and the external surface of steel ball (3) protrudes from the external surface of anticreep baffle plate (5).
2. low-resistance ball casing centralizer according to claim 1, it is characterized in that: the space that is positioned between steel ball (3) and steel bead groove (2) inwall is filled with several little steel balls (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380739 CN202718638U (en) | 2012-08-02 | 2012-08-02 | Superlow-resistance ball sleeve centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380739 CN202718638U (en) | 2012-08-02 | 2012-08-02 | Superlow-resistance ball sleeve centering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202718638U true CN202718638U (en) | 2013-02-06 |
Family
ID=47620464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220380739 Expired - Fee Related CN202718638U (en) | 2012-08-02 | 2012-08-02 | Superlow-resistance ball sleeve centering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202718638U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668477A (en) * | 2013-12-10 | 2014-03-26 | 吴江市大业丝绸整理有限公司 | Suction nozzle sucking ginned cotton |
| WO2021021233A1 (en) * | 2019-07-30 | 2021-02-04 | Stinger Oil Tools, Llc | Downhole friction reduction tools |
-
2012
- 2012-08-02 CN CN 201220380739 patent/CN202718638U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668477A (en) * | 2013-12-10 | 2014-03-26 | 吴江市大业丝绸整理有限公司 | Suction nozzle sucking ginned cotton |
| WO2021021233A1 (en) * | 2019-07-30 | 2021-02-04 | Stinger Oil Tools, Llc | Downhole friction reduction tools |
| US11015401B2 (en) | 2019-07-30 | 2021-05-25 | Stinger Oil Tools Llc | Downhole friction reduction tools |
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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: 20130206 Termination date: 20170802 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |