CN202064888U - Borehole wall rolling plugger - Google Patents
Borehole wall rolling plugger Download PDFInfo
- Publication number
- CN202064888U CN202064888U CN2011200468564U CN201120046856U CN202064888U CN 202064888 U CN202064888 U CN 202064888U CN 2011200468564 U CN2011200468564 U CN 2011200468564U CN 201120046856 U CN201120046856 U CN 201120046856U CN 202064888 U CN202064888 U CN 202064888U
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- CN
- China
- Prior art keywords
- borehole wall
- rolling shaft
- rolling
- main body
- supporting frame
- 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 borehole wall rolling plugger which comprises a main body with an inner hole, wherein a drill rod female buckle and a drill rod male buckle are respectively arranged at two ends of the main body; a rolling support structure and a functional structure are arranged in the main body, wherein the rolling support structure consists of a rolling shaft, a supporting frame, a supporting slide bar, a supporting frame fixing shaft and a rolling shaft fixing shaft, and the functional structure consists of a torsion spring, a limit cap and a hydraulic floating lever and is capable of realizing expansion and recovery of the rolling shaft; the supporting frame rotates around the supporting frame fixing shaft, the rolling shaft rotates around the rolling shaft fixing shaft, the hydraulic floating lever is connected with the supporting frame through the supporting slide bar, and the rolling shaft is connected with the supporting frame. On the basis of the existing plugging technology for the low pressure leaking formation, by dint of the action of the mechanical force, the borehole wall rolling plugger ensures that the plugging material in the drilling fluid is rapidly squeezed into the hole, the slit and the opening close to the borehole wall. At the same time, by repeated squeezing, the fluid phase in the borehole wall plugging mud cake is constantly squeezed in the accumulation formation process of the borehole wall plugging mud cake to quickly form the borehole wall plugging mud cake with high density and good toughness.
Description
Technical field
The utility model relates to the oil gas well drilling field, relates in particular to a kind of borehole wall roll extrusion leak stopping device, is used for the drilling mud leak stopping.
Background technology
In the drilling process of oil gas well, when boring chance low pressure, leakiness stratum, when the pressure of shaft bottom drilling mud was higher than the pore pressure on stratum, drilling mud will flow in the stratum along the hole in the stratum, seam, hole, and the leakage of drilling mud takes place.Drill mud leakage, the lighter loses mud, pollutes the stratum, and weight person's mud circulation can't be set up, and causes to creep into operation and can't carry out or occur other complicated down-hole accident.How effectively can shutoff leakage stratum be finish down the key technology that step oil gas well creeps into operation.
At present, Chang Yong drilling mud leakage stopping technology mainly is divided into two classes.The first kind; when brill chance low pressure leakiness stratum is hole, the leakage of seam type; employing adds the solid phase particles or the strip solid phase of particle diameter coupling in drilling fluid; when they with circulation of drilling fluid during to the absorption well section; the pressure of down-hole drilling fluids is higher than the pressure reduction that leakage stratum pore pressure produces, and will make solid phase particles or strip solid phase in the drilling fluid constantly pile up at the borehole wall, forms the lower mud cake of permeability; stop that follow-up drilling fluid continues the stratum of bleeding, thereby realize the effect of leak stopping.The shortcoming of this method is, effectively the formation speed of leak stopping layer is slower, piles up the leak stopping mud cake that forms on the borehole wall simultaneously, and compactness, obdurability are not enough.Second class, when the hole on low pressure leakiness stratum, seam, hole were big, pernicious leakage appearred in the stratum.At this moment accelerated cement slurry is injected the absorption well section, borehole fluid pressure is higher than formation pore pressure, and cement paste flows in the hole, seam, hole of the nearly borehole wall.After static a period of time treats that cement paste solidifies, drill through the well of cement injection again, continue the drillng operation of lower part borehole as leak stopping success back.The shortcoming of this method is, causes the plugging operations time longer, and borehole wall leak stopping mud cake is damaged easily in the drillng operation of bottom, and leakage takes place once more.
Summary of the invention
At the problems referred to above, the purpose of this utility model is to provide a kind of borehole wall roll extrusion leak stopping device, to solve problems of the prior art.
To achieve these goals, the utility model is to realize by the following technical solutions:
Borehole wall roll extrusion leak stopping device, it is characterized in that, comprise the main body that has endoporus, be respectively arranged with drilling rod box and drilling rod pin thread at the two ends of main body, in main body, be provided with the roll extrusion braced structures of forming by rolling shaft, bracing frame, support slide bar, bracing frame fixed axis, rolling shaft fixed axis, and open and the functional structure that reclaims by the realization rolling shaft that torque spring, limited cap, hydraulic floating bar are formed; Support frame as described above rotates around the bracing frame fixed axis, and rolling shaft is around the rotation of rolling shaft fixed axis, and described hydraulic floating bar is connected with bracing frame by supporting slide bar, and rolling shaft is connected with bracing frame.
Further, in the utility model, be outside equipped with the epicone piece and bore piece down in main body.
The utility model is on the leakage stopping technology basis on present low pressure leakiness stratum, loss circulation material in drilling fluid enters earth bore, seam, hole, form in the process of wall cake, utilize the effect of mechanical force, fast the extruding of the loss circulation material in the drilling fluid is entered in the hole, seam, hole of the nearly borehole wall.By extruding repeatedly, pile up in the process that forms simultaneously, constantly push the liquid phase in the borehole wall leak stopping mud cake, form the borehole wall leak stopping mud cake of higher densification, obdurability apace at borehole wall leak stopping mud cake.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A sectional view of Fig. 1.
Wherein: 1, drilling rod box.2, main body.3, bore piece down.4, epicone piece.5, drilling rod pin thread.6, rolling shaft.7, bracing frame.8, support slide bar.9 torque springs.10, bracing frame fixed axis.11, rolling shaft fixed axis.12, endoporus.13, limited cap.14, hydraulic floating bar.
The specific embodiment
Referring to Fig. 1 and 2, borehole wall roll extrusion leak stopping device comprises drilling rod box 1, main body 2, following awl piece 3, epicone piece 4, drilling rod pin thread 5, rolling shaft 6, bracing frame 7 supports slide bar 8, torque spring 9, bracing frame fixed axis 10, rolling shaft fixed axis 11, endoporus 12, limited cap 13, hydraulic floating bar 14.
With the drilling rod pin thread 5 of borehole wall roll extrusion leak stopping device upwards, drilling rod box 1 inserts in the bottom tubing string of drilling tool downwards.According to conventional plugging operations program, after arriving leak stopping well section under the drilling tool, inject the leak stopping slurry, turn on pump is rotation drilling tool simultaneously.When the pressure in the borehole wall stitching place was higher than its annular pressure, hydraulic floating bar 14 radially outwards promoted bracing frame 7 by supporting slide bar 8 under the promotion of drilling tool internal pressure.Bracing frame 7 rotates around bracing frame fixed axis 10, and rolling shaft 6 radially extends out, and is squeezed on the borehole wall.When rotation drilling tool, rolling shaft 6 is around 11 rotations of rolling shaft fixed axis, and this moment, rolling shaft 6 was squeezed on the borehole wall, along with the continuous rotation of drilling tool, the borehole wall was pushed repeatedly, realized forming apace the borehole wall leak stopping mud cake of higher densification, obdurability.When the drilling tool internal pressure was identical with annular pressure, torque spring 9 promoted bracing frame 7 and rotates around bracing frame fixed axis 10, and bracing frame 7 drives rolling shaft 6 and hydraulic floating bar 14 resets.This moment drilling tool can carry normally, tripping operation.
With borehole wall roll extrusion leak stopping device pin thread upwards, box inserts downwards in the bottom tubing string of drilling tool, equally can be in the operation of band loss circulation material leak stopping while boring, the borehole wall is carried out squeeze job, realize forming apace the borehole wall leak stopping mud cake of higher densification, obdurability.
Claims (2)
1. borehole wall roll extrusion leak stopping device, it is characterized in that, comprise the main body (2) that has endoporus (12), be respectively arranged with drilling rod box (1) and drilling rod pin thread (5) at the two ends of main body (2), in main body (2), be provided with the roll extrusion braced structures of forming by rolling shaft (6), bracing frame (7), support slide bar (8), bracing frame fixed axis (10), rolling shaft fixed axis (11), and open and the functional structure that reclaims by the realization rolling shaft that torque spring (9), limited cap (13), hydraulic floating bar (14) are formed; Support frame as described above (7) rotates around bracing frame fixed axis (10), and rolling shaft (6) is around rolling shaft fixed axis (11) rotation, and described hydraulic floating bar is connected with bracing frame (7) by supporting slide bar (8), and rolling shaft (6) is connected with bracing frame (7).
2. borehole wall roll extrusion leak stopping device according to claim 1 is characterized in that, is outside equipped with epicone piece (4) and bores piece (3) down in main body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200468564U CN202064888U (en) | 2011-02-24 | 2011-02-24 | Borehole wall rolling plugger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200468564U CN202064888U (en) | 2011-02-24 | 2011-02-24 | Borehole wall rolling plugger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202064888U true CN202064888U (en) | 2011-12-07 |
Family
ID=45058756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200468564U Expired - Fee Related CN202064888U (en) | 2011-02-24 | 2011-02-24 | Borehole wall rolling plugger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202064888U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031656A (en) * | 2020-05-22 | 2020-12-04 | 中国石油化工股份有限公司 | Long broken area wall of a well supporting tool in shallow layer |
-
2011
- 2011-02-24 CN CN2011200468564U patent/CN202064888U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031656A (en) * | 2020-05-22 | 2020-12-04 | 中国石油化工股份有限公司 | Long broken area wall of a well supporting tool in shallow layer |
| CN112031656B (en) * | 2020-05-22 | 2022-11-15 | 中国石油化工股份有限公司 | Long broken area wall of a well supporting tool in shallow layer |
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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: 20111207 Termination date: 20180224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |