CN202937212U - Top multistage pressure bearing type expandable construction device for expandable pipes - Google Patents
Top multistage pressure bearing type expandable construction device for expandable pipes Download PDFInfo
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- CN202937212U CN202937212U CN 201220517949 CN201220517949U CN202937212U CN 202937212 U CN202937212 U CN 202937212U CN 201220517949 CN201220517949 CN 201220517949 CN 201220517949 U CN201220517949 U CN 201220517949U CN 202937212 U CN202937212 U CN 202937212U
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- expandable
- expansion
- hydraulic piston
- tube
- hydraulic cylinder
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Abstract
The utility model relates to a top multistage pressure bearing type expandable construction device for expandable tubes. The device comprises an expandable tube, an expandable taper, a hydraulic cylinder body, a hydraulic piston and top sealing units. The expandable taper is arranged in the expandable tube, and the hydraulic piston is arranged on the expandable taper. One to ten of the top sealing units are combined through a sliding screw to be arranged in a transmission guide rod. The upper ends of the top sealing units are connected with a centralizer, and the lower ends are connected with the hydraulic cylinder body. The hydraulic piston is arranged in the hydraulic cylinder body, a drill stem is in threaded connection with the centralizer, a valve ball is arranged in the drill stem, the hydraulic piston is connected with the expandable taper, the taper surface of the expandable taper is contacted with the inner wall of the expandable tube, and a bottom sealing seat is arranged at the bottom of the expandable tube. By means of the top multistage pressure bearing type expandable construction device, the safe reliability of expandable tube construction is improved, the process is simple, the cost can be reduced effectively, the construction successful rate is improved, and a broad application prospect is provided.
Description
Technical field
The utility model relates to industrial gas oil tubing and casing repair of damage and completion practice, a kind of expansion gear that facilitates oil drilling Expansion on site pipe of special design.
Background technology
Entity expansion sleeve SET (Solid Expandable Tubular) technology is to realize that " saving " borehole size is purpose, casing string is expanded radially into a kind of drilling well, completion and the well workover new technology of desired diameter dimension in well.Bulged tube technology is the successful sealing that is applied to the down-hole bad grounds such as production pay sand prevention, caving ground are anti-collapse, leakage stratum leak stopping now, the operation process such as the field such as buckling type tail pipe hanger and the impaired casing repairing of oil well and drilling well, completion and oil recovery, well workover have developed into effective new technique that solves complex formation situation in oil, gas well drilling process.The development and application of bulged tube technology will make the drilling completion level of China significantly improve, and the drilling completion competitiveness of China is further improved, have great economic benefit and social benefit, be considered to the richest revolutionary technology of petroleum drilling and mining industry " 21 century ".
Expanded downhole pipe construction apparatus for work commonly used is at the inboard highly pressurised liquid that imports of expansion tube now, impel expansion tube lower seal base and expansion cone confined space to build the pressure, thereby promotion expansion cone bottom, drive expansion cone motion from bottom to top, complete the expansion tube process, as the expansion gear of patent 200510122335.1 and patent 200420053900.4 designs.but due to expansion tube itself be a kind of steel pipe of suitability for industrialized production, inevitably can produce body circle certain ovality arranged, the problems such as the even inside pipe wall of wall unevenness is of low quality, make and have certain gap between expansion tube inwall and expansion cone, during with conventional method expansion tube construction operation, when the importing highly pressurised liquid builds the pressure, the loss of liquid and the decline of pressure can be caused in these gaps, cause suppress too high, security implication to expansion tube itself is very large, can form in serious situation and import the very high but expansion cone of fluid pressure and can't move, cause the failure of expansion construction operation.
The utility model content
The utility model purpose is to provide a kind of top multistage pressure-bearing type expansion tube expansion construction equipment, can overcome existing apparatus and suppress too highly, and efficiency of construction is low and to the problem of expansion tube size and quality requirement harshness.
technical solution of the present utility model is as follows: a kind of top multistage pressure-bearing type expansion tube expansion construction equipment, comprise expansion tube (16), expansion cone (13), hydraulic cylinder (8), hydraulic piston (12), the top seal unit, be provided with expansion cone (13) in expansion tube (16), expansion cone (13) is provided with hydraulic piston (12), it is characterized in that: sealing limiting plate (3), sealed extruded device (5) and caulking gum (4) form 1～10 top seal unit, 1～10 sealing unit combines with lead screw (7), the transmission guide rod (6) of packing into, the upper end connects centralizer (2), the lower end is connected with hydraulic cylinder (8), be provided with hydraulic piston (12) in hydraulic cylinder (8), radially be provided with 4 spring blend stops (10) in hydraulic piston (12), respectively distribute one along the hydraulic piston circumference 90 ° of angles that are separated by, hydraulic cylinder (8) inwall is provided with tip hole (11), drilling rod (1) and centralizer (2) are threaded connection, be provided with valve ball (9) in drilling rod (1), hydraulic piston (12) is connected with expansion cone (13), expansion cone (13) conical surface contacts with the inwall of expansion tube (16), expansion tube (16) bottom is provided with sealed bottom seat (15) by screw thread and expansion tube (16) sealing.
The large end of diameter of expansion cone (13) is provided with 8 pressure through holes (14) along circumference.
The utility model has solved due to problems such as the round even inside pipe wall of wall unevenness of body are of low quality, during the conventional method expansion tube construction operation that causes, operational pressure is too high, on the inherently safe very large impact of expansion tube, improved the security reliability of expansion tube construction operation, technique is simple, to the excessive demand of body quality and driving ability, can effectively reduce cost in reduction expansion tube construction operation, improve the success rate of construction operation, have broad application prospects.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model expansion operation structure schematic diagram.
Fig. 3 is expansion tube A-A sectional structure schematic diagram.
The specific embodiment
The utility model structural representation is as shown in Fig. 1～3.Described top pressure-bearing expansion construction equipment is sent into underground work by drilling rod 1, drilling rod 1 and centralizer 2 are threaded connection, sealing limiting plates 3 in the lower end of centralizer 2, caulking gum 4 between sealing limiting plate 3 and sealed extruded device 5, the material of caulking gum 4 can be selected the cyaniding nitrile rubber, have moderate finite deformation ability and high voltage performance, sealed extruded device 5 can be along lead screw 7 upward slidings so that crush seal rubber 4.Sealing limiting plate 3, sealed extruded device 5 and caulking gum 4 be composition top seal unit jointly, majority optional according to the condition of concrete expansion construction operation top seal unit is to obtain the optimal seal effect, during elected majority top seal unit, realize sealed extruded device 5 motion crush seal simultaneously rubber 4 by transmission guide rod 6.Sealed extruded device 5 belows are hydraulic cylinders 8, in hydraulic piston 12 is arranged, radially be provided with 4 spring blend stops 10 in hydraulic piston 12, respectively distribute one along the hydraulic piston circumference 90 ° of angles that are separated by, be provided with tip hole 11 on hydraulic cylinder 8 inwalls, when spring blend stop 10 is in sustained height with tip hole 11, spring blend stop 10 can insert tip hole 11 under the effect of spring force, be formed centrally unobstructed center channel in hydraulic piston 12, when spring blend stop 10 separated up and down with tip hole 11, spring blend stop 10 stretched out to form to hydraulic piston 12 center positions and stops.What be connected by screw thread with hydraulic piston 12 is expansion cone 13, expansion cone 13 is the large bullets of the little lower end diameter of upper end diameter, expansion cone 13 conical surfaces contact with the inwall of expansion tube 16 and make expansion tube 16 that plastic strain radially occurs under the effect of stress, 8 pressure through holes at the large end of diameter of expansion cone 13 along circumference branch, as shown in Figure 3, can keep on expansion cone 13 downforce to equate, in the bottom of expansion tube 16, sealed bottom seat 15 is housed, seal by screw thread and expansion tube 16.
Embodiment 1:
1) will seal limiting plate 3, sealed extruded device 5 and caulking gum 4 common 2 top seal unit that form and combine with lead screw 7, the transmission guide rod 6 of packing into, upper end connection centralizer 2, the lower end is connected with hydraulic cylinder 8; Spring blend stop 10 in compression hydraulic piston 12 upwards pushes hydraulic piston 8 and forms 39mm, hydraulic cavities 17 residual altitude 30mm.Tighten expansion cone 13 at hydraulic piston 8 lower ends screw-ins.
2) pack the device of 1 step assembling into end through pre-expansion expansion tube 16, expansion tube 16 external diameter 107.95mm, it is 95mm that wall thickness 6.35mm adjusts caulking gum 4 outside dimensions, caulking gum 4 rigidly connects tactile with expansion tube 16, the expansion tube 16 bottoms sealed bottom seat 15 of packing into, to sealed bottom seat 15 test that builds the pressure, test hydraulic pressure 31MPa Leakage Test is qualified.
3) use drilling rod 1 to need to implement the well section of construction operation under whole top pressure-bearing expansion construction equipment lower going-into-well, drop into valve ball 9, the position that valve ball 9 drops to spring blend stop 10 is blocked, import highly pressurised liquid by drilling rod 1, force value is 10MPa, hydraulic cylinder 8 39mm that moves up, hydraulic cylinder 8 promotes sealed extruded device 5 crush seal rubber 4, and after caulking gum 4 is received extruding, distortion is radially forming high pressure sealings with expansion tube 16.
4) cylinder pressure body 8 moves up after 39mm, hydraulic pressure is changed to 2.5MPa, be that spring blend stop 10 has inserted tip hole 11 under the effect of spring force, when dropping to sealed bottom seat 15, valve ball 9 again forms the center channel sealing, having 2.5MPa pressure to exist the explanation highly pressurised liquid to form between sealed bottom seat 15 and sealed extruded device 5 builds the pressure, caulking gum 4 is good with expansion tube 16 sealing effectivenesss, continue to increase hydraulic pressure to 25MPa, promote whole top seal unit drive expansion cone 13 and complete whole expansion construction operations, the work progress pressure stability, expansion effect is good.
Claims (2)
1. top multistage pressure-bearing type expansion tube expansion construction equipment, comprise expansion tube (16), expansion cone (13), hydraulic cylinder (8), hydraulic piston (12) and top seal unit, be provided with expansion cone (13) in expansion tube (16), expansion cone (13) is provided with hydraulic piston (12), it is characterized in that: sealing limiting plate (3), sealed extruded device (5) and caulking gum (4) form 1～10 top seal unit, 1～10 sealing unit combines with lead screw (7), the transmission guide rod (6) of packing into, its upper end connects centralizer (2), the lower end is connected with hydraulic cylinder (8), be provided with hydraulic piston (12) in hydraulic cylinder (8), radially be provided with 4 spring blend stops (10) in hydraulic piston (12), respectively distribute one along the hydraulic piston circumference 90 ° of angles that are separated by, hydraulic cylinder (8) inwall is provided with tip hole (11), drilling rod (1) and centralizer (2) are threaded connection, be provided with valve ball (9) in drilling rod (1), expansion cone (13) conical surface contacts with the inwall of expansion tube (16), expansion tube (16) bottom is provided with sealed bottom seat (15).
2. a kind of top as claimed in claim 1 multistage pressure-bearing type expansion tube expansion construction equipment, it is characterized in that: the large end of diameter of expansion cone (13) is provided with 8 pressure through holes (14) along circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220517949 CN202937212U (en) | 2012-10-10 | 2012-10-10 | Top multistage pressure bearing type expandable construction device for expandable pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220517949 CN202937212U (en) | 2012-10-10 | 2012-10-10 | Top multistage pressure bearing type expandable construction device for expandable pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202937212U true CN202937212U (en) | 2013-05-15 |
Family
ID=48321456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220517949 Withdrawn - After Issue CN202937212U (en) | 2012-10-10 | 2012-10-10 | Top multistage pressure bearing type expandable construction device for expandable pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202937212U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937008A (en) * | 2012-10-10 | 2013-02-20 | 西安三环科技开发总公司 | Top multistage pressure-bearing expansion pipe expansion construction device |
| CN107288573A (en) * | 2017-07-18 | 2017-10-24 | 中国石油化工股份有限公司 | Automatic hydraulic expands guard system and its operating method |
-
2012
- 2012-10-10 CN CN 201220517949 patent/CN202937212U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937008A (en) * | 2012-10-10 | 2013-02-20 | 西安三环科技开发总公司 | Top multistage pressure-bearing expansion pipe expansion construction device |
| CN102937008B (en) * | 2012-10-10 | 2015-05-13 | 西安三环科技开发总公司 | Top multistage pressure-bearing expansion pipe expansion construction device |
| CN107288573A (en) * | 2017-07-18 | 2017-10-24 | 中国石油化工股份有限公司 | Automatic hydraulic expands guard system and its operating method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130515 Effective date of abandoning: 20150513 |
|
| RGAV | Abandon patent right to avoid regrant |