CN201184156Y - Variable radial expanding head for expansion reinforcing - Google Patents
Variable radial expanding head for expansion reinforcing Download PDFInfo
- Publication number
- CN201184156Y CN201184156Y CNU2008200894606U CN200820089460U CN201184156Y CN 201184156 Y CN201184156 Y CN 201184156Y CN U2008200894606 U CNU2008200894606 U CN U2008200894606U CN 200820089460 U CN200820089460 U CN 200820089460U CN 201184156 Y CN201184156 Y CN 201184156Y
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- CN
- China
- Prior art keywords
- block teeth
- expansion block
- centerbody
- expansion
- groove
- 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 - Lifetime
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Abstract
The utility model relates to an underground tool for an oil field, relates to a variable diameter tool used for expanding and strengthening a casing damaged well in an oil field, and solves the problem of construction failure caused by the invariable diameter of an expansion head. The variable diameter tool mainly consists of a center body 1, a pressing sleeve 2, a plate spring 3, a pin 4, an upper expansion slip dog 5, a lower expansion slip dog 6, a tractor 7 and a baffle ring 8; wherein a wedge shaped face at the upper part of the tractor 7 is inserted into a flank at the lower part of the upper expansion slip dog 5; the flanks of the upper expansion slip dog 5 and the lower expansion slip dog 6 are mutually staggered and pressed on a through groove of the center body 1; and the baffle ring 8 and the center body 1 are connected through screw threads. The tool suits the aspects such as patching and reinforcement after face lifting of the casing variable well, patching after casing corrosion, water shut-off of water yield formation, etc., and has the advantages of large diameter after reinforcement, strong adaptability, difficult blocking, safe and convenient construction, etc.
Description
Technical field:
The utility model relates to the oil field downhole tool, belongs to a kind of reducing instrument that casing damage well expands and reinforces that is used for.
Background technology:
Existing expansion is reinforced an external diameter that expands and is fixed, and not thorough when running into casing milling, perhaps activity bad break, and milling well section has junk to cause when this place's latus rectum is too small to cause the bulbs of pressure too high, and bloated head is hampered and can't passes through this well section, causes the strengthening construction failure.Can well address this problem and use the reducing head that expands, the reducing head just auto-necking when the bulbs of pressure reach a certain setting value that expands, by after this reducing well section voluntarily hole enlargement arrive former setting value, finish strengthening construction.
Summary of the invention:
The purpose of this utility model is to solve because a kind of expansion that problem that head can't the construction failure that reducing caused develops of expanding of expanding is reinforced with the bloated head of reducing.
The utility model mainly is made up of centerbody, gland, leaf spring, pin, last expansion block teeth, following expansion block teeth, traction body and baffle ring.Wherein go up on the groove that the expansion block teeth are positioned over centerbody, leaf spring is positioned in the groove of expansion block teeth, gland is enclosed in leaf spring in the groove of centerbody, the cotter slot that pin is arranged in centerbody will be gone up the expansion block teeth and be fixed on the centerbody, following expansion block teeth place in the T-shape groove of centerbody on the expansion block teeth limit, respectively there is outstanding flank the bottom of last expansion block teeth with the top of following expansion block teeth, the lozenges on traction body top inserts in the flank of going up expansion block teeth bottom, interlaced the laminating on the groove that is positioned at centerbody of flank of last expansion block teeth and following expansion block teeth, baffle ring and centerbody screwed connection.
Each five of last expansion block teeth and following expansion block teeth; The lozenges of traction body is for facing directly.
Compared with the prior art the utility model has following advantage:
(1), outer radius variableization of the present utility model, it can be by high bulbs of pressure well section, guarantees that reinforcement process implements.
(2), adopt the design of block teeth plug-in type, make the utility model be drawn back Shi Buhui and the expansion slit occurs, guarantee through the expand expansion tube inner wall smooth of its outside, back of this device, internal diameter unanimity.
(3), adopt the laminated type design, expansion block teeth and following expansion block teeth are synchronized with the movement.
Description of drawings:
Fig. 1 is the utility model structure diagram;
Fig. 2 is that centerbody, the assembly drawing of going up expansion block teeth and following expansion block teeth and A thereof are to schematic diagram;
Fig. 3 is the structure chart of centerbody and B thereof to, C to schematic diagram;
Fig. 4 is the stereogram of last expansion block teeth;
Fig. 5 is the stereogram of following expansion block teeth;
Fig. 6 is the stereogram of traction body.
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is done further auspicious stating, the utility model mainly is made up of centerbody 1, gland 2, leaf spring 3, pin 4, last expansion block teeth 5, following expansion block teeth 6, traction body 7 and baffle ring 8.Wherein go up on the groove that expansion block teeth 5 are positioned over centerbody 1, leaf spring 3 is positioned in the groove of expansion block teeth 5, gland 2 is enclosed in leaf spring 3 in the groove of centerbody 1, the cotter slot that pin 4 is arranged in centerbody 1 will be gone up expansion block teeth 5 and be fixed on the centerbody 1, following expansion block teeth 6 place in the T-shape groove of centerbody 1 on expansion block teeth 5 limits, respectively there is outstanding flank the bottom of last expansion block teeth 5 with the top of following expansion block teeth 6, the lozenges on traction body 7 tops inserts in the flank of going up expansion block teeth 5 bottoms, interlaced the laminating on the groove that is positioned at centerbody 1 of flank of last expansion block teeth 5 and following expansion block teeth 6, thereby the displacement of baffle ring 8 and centerbody 1 usefulness screwed connection restriction traction body 7.
Respectively five of last expansion block teeth 5 and following expansion block teeth 6; The lozenges of traction body 7 is for facing directly.
Its 5 while of last expansion block teeth that supported radial contraction when traction body 7 moves down, and during the support of the following expansion block teeth expansion block teeth 5 on losing above it also with its synchronous radial contraction, can guarantee to expand head like this at the position reducing that is hampered, when traction body 7 moves backward to baffle ring 8 positions, stop to relatively move.
During on-the-spot the use, at first assemble this instrument, again with the outer suit expansion tube of the utility model, traction body 7 below the centerbody 1 links together with hydraulic control unit, the whole top that combines connects with two and half external upset tubings with one, carry to well head on the button elevator, be lowered in the sleeve pipe, change elevator and be lowered to two and half external upset tubings successively up to the well section that will reinforce, suppress promotion the utility model by well head and expand, expansion tube is by its distending at this moment, and it is big that caliber becomes, be close to damaged internal surface of sleeve pipe, when running into high bulbs of pressure well section, the utility model can't continue motion, continues this moment to be suppressed by well head, when pressure reaches the needed pressure of the utility model reducing, hydraulic control unit behind the traction body 7 drives traction body 7 and moves down, and along with the last expansion block teeth 5 of its support of axially-movable of traction body 7 inclined-plane along traction body 7 radially falls, and drives down expansion block teeth 6 in whereabouts in the radial direction, thereby make this device reduced diameter, by the well section that is hampered.Afterwards along with the reduction of pressure, when reaching certain pressure, hydraulic control unit drives traction body 7 counter motions, can finish corresponding hole enlargement action once more, make the utility model return to maximum outside diameter and expand, finish work progress by whole expansion tube up to it.
Claims (3)
1, a kind of expansion is reinforced with the bloated head of reducing, and it is characterized in that: it mainly is made up of centerbody (1), gland (2), leaf spring (3), pin (4), last expansion block teeth (5), following expansion block teeth (6), traction body (7) and baffle ring (8); Wherein going up expansion block teeth (5) is positioned on the groove of centerbody (1), leaf spring (3) is positioned in the groove of expansion block teeth (5), gland (2) is enclosed in leaf spring (3) in the groove of centerbody (1), the cotter slot that pin (4) is arranged in centerbody (1) will be gone up expansion block teeth (5) and be fixed on the centerbody (1), following expansion block teeth (6) place in the T-shape groove of centerbody (1) on expansion block teeth (5) limit, respectively there is outstanding flank the bottom of last expansion block teeth (5) with the top of following expansion block teeth (6), the lozenges on traction body (7) top inserts in the flank of going up expansion block teeth (5) bottom, interlaced the laminating on the groove that is positioned at centerbody (1) of flank of last expansion block teeth (5) and following expansion block teeth (6), baffle ring (8) is used screwed connection with centerbody (1).
2, a kind of expansion according to claim 1 is reinforced with the bloated head of reducing, and its feature also is: go up each five of expansion block teeth (5) and following expansion block teeth (6).
3, a kind of expansion according to claim 1 is reinforced with the bloated head of reducing, and its feature also is: the lozenges of traction body (7) is for facing directly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200894606U CN201184156Y (en) | 2008-03-13 | 2008-03-13 | Variable radial expanding head for expansion reinforcing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200894606U CN201184156Y (en) | 2008-03-13 | 2008-03-13 | Variable radial expanding head for expansion reinforcing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201184156Y true CN201184156Y (en) | 2009-01-21 |
Family
ID=40271896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200894606U Expired - Lifetime CN201184156Y (en) | 2008-03-13 | 2008-03-13 | Variable radial expanding head for expansion reinforcing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201184156Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718180B (en) * | 2009-11-17 | 2012-11-14 | 中国石油集团长城钻探工程有限公司 | Floating hinged rolling reducing expansion cone |
| CN104005725A (en) * | 2013-02-26 | 2014-08-27 | 天津大港油田钻采技术开发公司 | Expansion pipe two-stage expansion device |
| CN101906947B (en) * | 2009-06-04 | 2014-10-15 | 中国石化集团胜利石油管理局钻井工艺研究院 | Umbrella type variable gauge inflate tool for expansion tube |
-
2008
- 2008-03-13 CN CNU2008200894606U patent/CN201184156Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906947B (en) * | 2009-06-04 | 2014-10-15 | 中国石化集团胜利石油管理局钻井工艺研究院 | Umbrella type variable gauge inflate tool for expansion tube |
| CN101718180B (en) * | 2009-11-17 | 2012-11-14 | 中国石油集团长城钻探工程有限公司 | Floating hinged rolling reducing expansion cone |
| CN104005725A (en) * | 2013-02-26 | 2014-08-27 | 天津大港油田钻采技术开发公司 | Expansion pipe two-stage expansion device |
| CN104005725B (en) * | 2013-02-26 | 2016-12-28 | 天津大港油田钻采技术开发公司 | Expansion tube twin-stage expansion gear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090121 |