CN211342812U - Hydraulic casing centralizer - Google Patents
Hydraulic casing centralizer Download PDFInfo
- Publication number
- CN211342812U CN211342812U CN201921942322.2U CN201921942322U CN211342812U CN 211342812 U CN211342812 U CN 211342812U CN 201921942322 U CN201921942322 U CN 201921942322U CN 211342812 U CN211342812 U CN 211342812U
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- casing
- groove
- centralizing
- way valve
- centralizer
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Abstract
The utility model relates to a sleeve pipe hydraulic righting device. The centralizer mainly solves the problem that the existing centralizer has poor centralizing effect in a horizontal well so as to influence the cementing quality of a casing pipe at a horizontal section. The method is characterized in that: the outer surface of the central tube (1) is provided with a circumferential groove (9), the body (2) is sleeved outside the groove (9), the body (2) is provided with a plurality of radial through holes, conical centering plungers (3) are arranged in the through holes, the outer parts of the centering plungers (3) are limited by bosses (4), and the bosses (4) are welded on the body (2); a one-way valve (6) is fixed on the side wall of the central tube (1), and the outlet of the one-way valve (6) is aligned with the groove (9). The casing hydraulic centralizing device ensures that the casing of the horizontal well is centered, so that cement sheath between the casing and the well is uniform, thereby improving the cementing quality of the horizontal well.
Description
Technical Field
The utility model relates to an oil field, a sleeve pipe hydraulic centralizer specifically says so.
Background
The existing casing centralizer is mainly provided with an elastic centralizer, a rigid roller centralizer and the like. The centralizers have good centralizing effect in a vertical well, but have poor application effect in a horizontal well, and influence the quality of casing cementing of a horizontal section.
SUMMERY OF THE UTILITY MODEL
In order to overcome current centralizer in the horizontal well centralizing effect poor and influence the not enough of horizontal segment sleeve pipe well cementation quality, the utility model provides a sleeve pipe hydraulic centralizing device, this sleeve pipe hydraulic centralizing device guarantee that the horizontal well sleeve pipe is placed in the middle, make the cement sheath between sleeve pipe and well even to improve the well cementation quality of horizontal well.
The technical scheme of the utility model is that: a casing hydraulic centralizing device comprises a central tube, wherein a circumferential groove is formed in the outer surface of the central tube, a body is sleeved outside the groove, a plurality of radial through holes are formed in the body, a conical centralizing plunger is arranged in each through hole, the outer part of each centralizing plunger is limited by a boss, and the bosses are welded on the body; and a one-way valve is fixed on the side wall of the central tube, and the outlet of the one-way valve is aligned with the groove.
The width of the groove is smaller than that of the body;
the inner diameter of the righting plunger is larger than the outer diameter;
the check valve is located radially between the two centralizing plungers.
The utility model discloses following beneficial effect has: by adopting the scheme, the casing hydraulic centralizing device is connected to the casing string and is lowered into a preset position together with the casing, liquid in the casing enters the annular groove after passing through the one-way valve, the centralizing plunger is pushed out of the centralizing device and is supported on a well wall, the casing is centered, a cement sheath between the casing and a well hole is uniform, and therefore the cementing quality of the horizontal well is improved. The casing hydraulic centralizing device can also play a good centralizing effect on irregular and expanded boreholes, and can also play a role in fixing the casing if the centralizing plunger is embedded into the stratum.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a sectional view at the check valve.
In the figure, 1-a central tube, 2-a body, 3-a righting plunger, 4-a boss, 5-a baffle ring, 6-a one-way valve, 7-sealing rings A, 8-sealing rings B and 9-a groove.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in figures 1 and 2, the casing hydraulic centralizing device comprises a central pipe 1, wherein a circumferential groove 9 is formed in the outer surface of the central pipe 1, a body 2 is sleeved outside the groove 9, the width of the body 2 is larger than that of the groove 9, and the body 2 is positioned outside steps on two sides of the groove 9. 2 one side of body relies on the step location on the outer wall of center tube 1, and the opposite side is fixed a position by keeping off ring 5, keeps off ring 5 and is the open-ended elastic ring, and the card is outside at center tube 1 to it is spacing to carry out body 2. Two sealing rings B8 are arranged between the body 2 and the central tube 1 and are respectively arranged at two sides of the groove 9.
The body 2 is provided with a plurality of radial through holes, conical centering plungers 3 are arranged in the through holes, and the inner diameter of the centering plungers 3 is larger than the outer diameter. The outside of the righting plunger 3 is limited by a boss 4, the boss 4 is welded on the body 2, and the inner diameter of the boss 4 is between the large diameter and the small diameter of the righting plunger 3. And a sealing ring A7 is arranged between the righting plunger 3 and the through hole of the body. A one-way valve 6 is fixed on the side wall of the central tube 1, and the outlet of the one-way valve 6 is aligned with the groove 9. The number of the righting plungers 3 is 4, and the one-way valve 6 is located between the two righting plungers 3 in the radial direction.
The hydraulic centralizing device is connected with a casing, is serially connected with the casing, is put into a preset position in a well and then is pressurized, when the pressure in the casing reaches the set pressure of the check valve 6, the pressure in the casing shears a pin in the check valve 6, the check valve 6 is opened, liquid enters a groove 9 between the body 2 and the central tube 1, the centralizing plunger 3 is pushed out of the body 2 and is supported on the well wall, and the centralizing and fixing effects on the casing are achieved.
Claims (4)
1. A casing hydraulic centralizer, includes center tube (1), its characterized in that: the outer surface of the central tube (1) is provided with a circumferential groove (9), the body (2) is sleeved outside the groove (9), the body (2) is provided with a plurality of radial through holes, conical centering plungers (3) are arranged in the through holes, the outer parts of the centering plungers (3) are limited by bosses (4), and the bosses (4) are welded on the body (2); a one-way valve (6) is fixed on the side wall of the central tube (1), and the outlet of the one-way valve (6) is aligned with the groove (9).
2. The casing hydraulic centralizer of claim 1, wherein: the width of the groove (9) is smaller than that of the body (2).
3. The casing hydraulic centralizer of claim 2, wherein: the inner diameter of the centralizing plunger (3) is larger than the outer diameter.
4. A casing hydraulic centralizer as claimed in claim 3, wherein: the one-way valve (6) is located radially between the two centralizing plungers (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921942322.2U CN211342812U (en) | 2019-11-12 | 2019-11-12 | Hydraulic casing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921942322.2U CN211342812U (en) | 2019-11-12 | 2019-11-12 | Hydraulic casing centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211342812U true CN211342812U (en) | 2020-08-25 |
Family
ID=72094261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921942322.2U Active CN211342812U (en) | 2019-11-12 | 2019-11-12 | Hydraulic casing centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211342812U (en) |
-
2019
- 2019-11-12 CN CN201921942322.2U patent/CN211342812U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220113 Address after: 163453 Heilongjiang Province, Daqing City Ranghulu District No. 263 South Central Avenue Patentee after: DAQING PETROLEUM ADMINISTRATION Co.,Ltd. Patentee after: China National Petroleum Corporation Limited Address before: 163453 Heilongjiang Province, Daqing City Ranghulu District No. 263 South Central Avenue Patentee before: DAQING PETROLEUM ADMINISTRATION Co.,Ltd. |