CN202645485U - Novel well wall repair pipe string - Google Patents
Novel well wall repair pipe string Download PDFInfo
- Publication number
- CN202645485U CN202645485U CN 201220282171 CN201220282171U CN202645485U CN 202645485 U CN202645485 U CN 202645485U CN 201220282171 CN201220282171 CN 201220282171 CN 201220282171 U CN201220282171 U CN 201220282171U CN 202645485 U CN202645485 U CN 202645485U
- Authority
- CN
- China
- Prior art keywords
- pipe
- bellows
- corrugated pipe
- well wall
- wall repair
- 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 novel well wall repair pipe string. The novel well wall repair pipe string comprises a casing pipe, a corrugated pipe is connected with the lower portion of the casing pipe, the casing pipe and the corrugated pipe are welded together, a plug is connected with the lower portion of the corrugated pipe, the plug is provided with a straight pipe portion and a conical portion, the conical portion is located at the bottom of the straight pipe portion, one end of the conical portion, which is away from the straight pipe portion, is sealed, the cross section of the corrugated pipe wall is provided with a wave crest and a wave trough, the transition between the wave crest and the wave trough is in an arc mode, the wave crest and the wave trough of the corrugated pipe are parallel to a center line of the corrugated pipe, and the cross section of the corrugated pipe is in a four-piece shape. The novel well wall repair pipe string has the advantages that the casing pipe and the corrugated pipe are combined to form the well wall repair pipe string, the sealing for well drilling leakage stratum can be achieved, and the repair of oil-water well casing pipes can be achieved.
Description
Technical field
The utility model relates to a kind of petroleum machinery, and particularly a kind of new shaft wall is repaired tubing string.
Background technology
In Process of Oil Well Drilling, often run into the Underwell leakage stratum, can not the normal circulation drilling fluid, wellbore construction can't be carried out; In addition; in oil and gas exploitation; because corrosion; the reasons such as crustal movement; often can cause sleeve pipe corrosion or casing deformation, so that the equipment of recover petroleum natural gas can't G.I.H, can't exploit and affect production; cause a lot of oil gas water wells to be scrapped, cause the tremendous economic loss to enterprise.
Summary of the invention
The technical problems to be solved in the utility model is the deficiency for technique scheme, provides a kind of new shaft wall to repair tubing string, and this new shaft wall is repaired the sealing that tubing string can be realized drilling well leakage stratum, convenient reparation to the borehole wall.
Addressing the above problem the technical solution of the utility model is:
A kind of new shaft wall is repaired tubing string, comprises sleeve pipe, and the bottom of sleeve pipe is connected with bellows, sleeve pipe is in the same place with bellows-welding, and the bottom of bellows is connected with plug, and described plug has straight sections and tapered portion, tapered portion is positioned at the bottom of straight sections, and tapered portion is away from the end sealing of straight sections.
Below be to further improvement in the technical proposal:
The bellows wall cross-section has crest and trough is arranged, arc transition between crest and the trough, and the crest of bellows is parallel with the center line of bellows with trough, and the shape of the cross section of bellows is the pintongs shape.
The beneficial effects of the utility model: the borehole wall restoring pipe column of sleeve pipe and combined bellows, can realize the sealing on drilling well leakage stratum, also can realize the reparation of Casing Failure.By suppressing the bellows piece hole enlargement of expanding, make the bellows outer wall be close to the stratum, shutoff leakage stratum also substitutes the conventional cannula completion, and sleeve pipe is the bellows after the hole enlargement bottom, and inside diameter of bel can and set as the suspension of next stage sleeve pipe or expansion sleeve.
Below in conjunction with drawings and Examples technique scheme is described further.
Description of drawings
Accompanying drawing 1 is the structural representation that a kind of new shaft wall is repaired tubing string among the utility model embodiment;
Accompanying drawing 2 is the structural representation after the bellows expansion;
Structural representation when accompanying drawing 3 does not expand for bellows;
Accompanying drawing 4 is the structural representation of plug 3.
Among the figure:
The 1-sleeve pipe; The 2-bellows; The 3-plug; The 4-straight sections; The 5-tapered portion.
The specific embodiment
Embodiment, shown in accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, a kind of new shaft wall is repaired tubing string, comprises sleeve pipe 1, and the bottom of sleeve pipe 1 is connected with bellows 2, sleeve pipe 1 and bellows 2 weld together, the bottom of bellows 2 is connected with plug 3, and described plug 3 has straight sections 4 and tapered portion 5, and tapered portion 5 is positioned at the bottom of straight sections 4, tapered portion 5 is away from the end sealing of straight sections 4, and the diameter of tapered portion 5 reduces from down to up gradually; Bellows 2 wall cross-section have crest and trough are arranged, arc transition between crest and the trough, and the crest of bellows 2 is parallel with the center line of bellows 2 with trough, and the shape of the cross section of bellows 2 is pintongs shapes.
The borehole wall restoring pipe column G.I.H of sleeve pipe and combined bellows after arriving aligning leakage stratum under the bellows piece of tubing string, starts the ground drilling pump and suppresses.Pump pressure reaches 18MPa, and keeping the time of pump pressure is 30 minutes.The bellows expansion hole enlargement, the bellows expansion hole enlargement reverts to circular cross-section, will miss formation shut-off.Then, implement well cementing operation.
Claims (2)
1. a new shaft wall is repaired tubing string, comprise sleeve pipe (1), it is characterized in that: the bottom of sleeve pipe (1) is connected with bellows (2), sleeve pipe (1) and bellows (2) weld together, the bottom of bellows (2) is connected with plug (3), described plug (3) has straight sections (4) and tapered portion (5), and tapered portion (5) is positioned at the bottom of straight sections (4), and tapered portion (5) is away from the end sealing of straight sections (4).
2. a kind of new shaft wall as claimed in claim 1 is repaired tubing string, it is characterized in that: bellows (2) wall cross-section has crest and trough is arranged, arc transition between crest and the trough, the crest of bellows (2) is parallel with the center line of bellows (2) with trough, and the shape of the cross section of bellows (2) is the pintongs shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220282171 CN202645485U (en) | 2012-06-15 | 2012-06-15 | Novel well wall repair pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220282171 CN202645485U (en) | 2012-06-15 | 2012-06-15 | Novel well wall repair pipe string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202645485U true CN202645485U (en) | 2013-01-02 |
Family
ID=47414607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220282171 Expired - Fee Related CN202645485U (en) | 2012-06-15 | 2012-06-15 | Novel well wall repair pipe string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202645485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047562A (en) * | 2014-06-13 | 2014-09-17 | 中国石油集团西部钻探工程有限公司 | Gas underbalance casing drilling well completion expansion pipe |
-
2012
- 2012-06-15 CN CN 201220282171 patent/CN202645485U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047562A (en) * | 2014-06-13 | 2014-09-17 | 中国石油集团西部钻探工程有限公司 | Gas underbalance casing drilling well completion expansion pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20130615 |