CN2605378Y - Hydraulic rigid centralising device for well drilling and well cementation - Google Patents
Hydraulic rigid centralising device for well drilling and well cementation Download PDFInfo
- Publication number
- CN2605378Y CN2605378Y CN 03211935 CN03211935U CN2605378Y CN 2605378 Y CN2605378 Y CN 2605378Y CN 03211935 CN03211935 CN 03211935 CN 03211935 U CN03211935 U CN 03211935U CN 2605378 Y CN2605378 Y CN 2605378Y
- Authority
- CN
- China
- Prior art keywords
- well
- fluid cylinder
- tile
- hydraulic cylinder
- top connection
- 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 rigid hydraulic centralizer of the drilling cementing; wherein, the upper joint is connected with the hydraulic cylinder; a long groove with a limit sleeve is arranged between the upper joint and the hydraulic cylinder; the lower part of the upper joint is provided with a central tube; the cone in the lower part of the hydraulic cylinder is connected with an upending tile which is fixedly provided with a hydraulic cylinder and a tile seat by pins; when the pressure of the displacing cement column reaches to a certain degree in the pipe, the shear pin is sheared and the upending tile expands to open by a displacement restrictor; therefore, the well radius interval is increased and the upending tile close to the open-hole well hole to force the casing in. The device is simple in structure, and only demands to put in the sidetracking horizontal well with the casing in construction, thereby, ensuring the quality of the well cementation and widely applying in the deviated well and horizontal well in the oil field.
Description
Technical field:
The utility model relates to a kind of well drilling and cementing hydraulic pressure rigidity centralizer, belongs to well drilling and cementing erection device class.
Background technology:
Behind the drilling completion, cement the well to oil well, promptly sleeve pipe is lowered in the bore hole wellhole, well cementation is injected cement in well then, the bore hole borehole wall and sleeve outer wall are consolidated, and well cementation back reperforation, oil well just can recover the oil or carry out other operation like this; Along with development in science and technology and oil field development need, often to pierce sidetrack horizontal well and inclined shaft.Therefore, this class well shaft fixing technology requires complicated, when the G.I.H sleeve pipe, the target zone bunch tube will be forced between two parties, for the completion construction provides the down-hole uniform annular space, only in this way could guarantee hole quality, the even lamp umbrella of employed well cementation centralizer elasticity centralizer body in the existing technology, this centralizer only is fit to vertical boreholes, easily scratches the borehole wall in open hole well, uses the axle center that occurs sleeve pipe easily to be offset in sidetrack horizontal well, sleeve pipe is not positioned at wellbore centre, cause the situation that descends with the well quality, therefore, can only seek the technology of correcting the casing axis skew that solves.And the utility model adopts following apparatus to realize just.
The utility model content:
The purpose of this utility model is a kind of well drilling and cementing hydraulic pressure rigidity centralizer that provides in order to overcome above-mentioned shortcoming.It can be when drilling well is lowered to sleeve pipe be linked this device and promotes to set upright 1 and increase distance between the sleeve pipe and the borehole wall automatically in the sleeve pipe together, makes sleeve pipe be positioned at the borehole axis center, plays the sleeve pipe effect of setting upright.The utility model is to realize like this.
It is connecting a fluid cylinder by top connection by shear pin and is forming.One rectangular groove is arranged between described top connection and the fluid cylinder, place a stop collar in the groove, the top connection bottom central tube by screwed connection, and the outer field fluid cylinder of central tube lower end is cone-shaped, its cone chamfered portion pastes mutually with centrilizing tile, above the centrilizing tile with a dowel fixes on hydraulic cylinder.There is a watt seat described centrilizing tile outside.
Between described top connection bottom and the fluid cylinder middle part hydrophthalmia and sealing ring are arranged; The sealing of " O " type circle is arranged between central tube and fluid cylinder bottom.
The utility model compared with prior art has positive effect.
The utility model is with drilling well of sleeve pipe approaching side and horizontal well the time, because sidetracked hole center of gravity cause, sleeve pipe is wanted the disalignment, and the utility model can be in the cementing operation direct circulation, when displacement pressure reaches certain pressure, the interior fluid cylinder of centralizer is moved down, fluid cylinder bottom cone is pushed centrilizing tile open, the borehole wall can be close to this device in casing string hole diameter interval thus, it is placed in the middle to force the down-hole casing string to be forced, for well cementation provides uniform down-hole casing and stratum annular space, thereby guarantee the cement thickness equalization.
In addition, this installs whole process and is blended in fully in the well shaft fixing technology process, need not independent operation, and is safe and efficient, to the no negative effect of completion construction.Also can avoid scratching of the bore hole borehole wall prevented to cause cave-in, or the circuitous resistance of casing string, can force completion casing placed in the middle in any borehole axis angle to a greater extent, guarantee the well cementing quality.
Description of drawings: accompanying drawing: the utility model structural representation
Specific embodiment the utility model is provided below in conjunction with accompanying drawing by following examples the utility model is described further:
Among the figure: 1, top connection, 2, shear pin, 3, stop collar, 4, sealing ring, 5, fluid cylinder, 6, " O " type circle, 7, shop bolt, 8, centrilizing tile, 9, watt seat, 10, central tube, 11, hydrophthalmia, 12, steady pin.
Top connection 1 is a hollow round tubular among the figure, two ends have screw thread, the upper end is connected with 5 o'clock sleeve pipes, outside 6 lower ends of top connection are step-like, have on the step one have pyramidal fluid cylinder ride on the step and the fluid cylinder contact surface between form a rectangular groove, fluid cylinder is that the inclined-plane closely contacts with the cone face of top connection lower end, be one to have the ring-type stop collar 3 of breach between top connection and the fluid cylinder, this stop collar can limit the distance that fluid cylinder 5 glides toward lower slider in the middle of top connection and fluid cylinder 5, be fixed on the upper end of top connection 1 when fluid cylinder is installed with shear pin 2.Between the fluid cylinder of stop collar lower end and top connection, a sealing ring 4 is arranged, be used for the Sealed casing pipe internal pressure, be drilled with 3 round hydrophthalmias 11 between fluid cylinder under sealing ring and the top connection, this hole effect is the relief sleeve internal pressure, promoting fluid cylinder moves rapidly, make fluid cylinder cone spreading, central tube 10 is connected to each other by screw thread and top connection 1 bottom, the outer part of central tube directly contacts with 8 watts of seats 9 of fluid cylinder conical surface centrilizing tile, centrilizing tile 8 has shop bolt 7 and fluid cylinder 5 to be fixed together in the part that has cone, the lower end is fixed on the central tube with fixing pin 12, during this device construction, the device two ends link formation one integral body with cover pipe thread and sleeve pipe, after the utility model is gone into the well, press close to borehole wall situation as circuitous sleeve pipe offset axis center, the fluid cylinder 5 of centralizer top radially increases centrilizing tile 8, and then between sleeve pipe and the borehole wall apart from strain is big mutually, make sleeve pipe occupy the well shaft core position, played the automatic centralizing function of sleeve pipe.
Claims (2)
1, a kind of well drilling and cementing hydraulic pressure rigidity centralizer, be to connect a fluid cylinder (5) by shear pin (2) by top connection (1), it is characterized in that between described top connection (1) and the fluid cylinder (5) a rectangular groove being arranged, place a stop collar (3) in the groove, top connection (1) bottom is cone-shaped by the outer field fluid cylinder of screwed connection central tube (10) central tube lower end, its cone chamfered portion and centrilizing tile (8) link, be fixed on above the hydraulic cylinder (5) with a pin (7) above the centrilizing tile (8), one watt of seat (9) arranged in centrilizing tile (8) outside.
2, a kind of well drilling and cementing hydraulic pressure rigidity centralizer according to claim 1, it is characterized in that between described top connection (1) bottom and fluid cylinder (5) middle part hydrophthalmia (11) and sealing ring (4) being arranged, " O " type circle (6) sealing is arranged between central tube (10) and the fluid cylinder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03211935 CN2605378Y (en) | 2003-03-14 | 2003-03-14 | Hydraulic rigid centralising device for well drilling and well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03211935 CN2605378Y (en) | 2003-03-14 | 2003-03-14 | Hydraulic rigid centralising device for well drilling and well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2605378Y true CN2605378Y (en) | 2004-03-03 |
Family
ID=34159274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03211935 Expired - Fee Related CN2605378Y (en) | 2003-03-14 | 2003-03-14 | Hydraulic rigid centralising device for well drilling and well cementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2605378Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153719A (en) * | 2013-05-13 | 2014-11-19 | 中国石油化工股份有限公司 | Centralizer |
| CN104373058A (en) * | 2014-10-29 | 2015-02-25 | 中国石油集团西部钻探工程有限公司 | Hydraulic casing centralizer |
| CN107542424A (en) * | 2017-09-25 | 2018-01-05 | 西南石油大学 | The cased cementing system of robot assisted and method are drawn in a kind of horizontal well mud driving |
| CN112196493A (en) * | 2020-09-14 | 2021-01-08 | 中国电建市政建设集团有限公司 | Improved well completion process method suitable for water-saturated thick-layer fine sand layer |
| CN115110903A (en) * | 2021-03-17 | 2022-09-27 | 中国石油化工股份有限公司 | Sidetracking well large-drift-diameter casing centralizer, well completion pipe column and construction method thereof |
-
2003
- 2003-03-14 CN CN 03211935 patent/CN2605378Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153719A (en) * | 2013-05-13 | 2014-11-19 | 中国石油化工股份有限公司 | Centralizer |
| CN104373058A (en) * | 2014-10-29 | 2015-02-25 | 中国石油集团西部钻探工程有限公司 | Hydraulic casing centralizer |
| CN107542424A (en) * | 2017-09-25 | 2018-01-05 | 西南石油大学 | The cased cementing system of robot assisted and method are drawn in a kind of horizontal well mud driving |
| CN112196493A (en) * | 2020-09-14 | 2021-01-08 | 中国电建市政建设集团有限公司 | Improved well completion process method suitable for water-saturated thick-layer fine sand layer |
| CN115110903A (en) * | 2021-03-17 | 2022-09-27 | 中国石油化工股份有限公司 | Sidetracking well large-drift-diameter casing centralizer, well completion pipe column and construction method 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 |