CN201202429Y - Expansion tube hanging seal device for open hole section - Google Patents
Expansion tube hanging seal device for open hole section Download PDFInfo
- Publication number
- CN201202429Y CN201202429Y CNU2008200184005U CN200820018400U CN201202429Y CN 201202429 Y CN201202429 Y CN 201202429Y CN U2008200184005 U CNU2008200184005 U CN U2008200184005U CN 200820018400 U CN200820018400 U CN 200820018400U CN 201202429 Y CN201202429 Y CN 201202429Y
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- expansion
- starter
- expansion tube
- rubber
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Abstract
The utility model relates to an expansion tube suspension sealing device for an open hole section, which comprises a solid expansion tube, a variable diameter expansion tool, an expansion system, a rubber seal element and an expansion starter, wherein the expansion starter is arranged on the lower end of the expansion system, pressure sealing space of the expansion system is formed, a guiding shoe which is arranged on the lower end of the starter is a drillable material, the expansion tool is a variable diameter structure and is arranged in the starter, and the ring rubber seal elements on the two ends of the solid expansion tube can self-expand. The expansion tube produces deformation on radial direction using the expansion tool, the rubber elements and the upper and the lower well walls of a complex layer section closely contact, thereby achieving the purpose of plugging a complex layer. The expansion tube suspension sealing device has the advantages that the expansion operation is directly done near the complex layer of the open hole section, and the expansion tube suspension sealing device integrates the functions of suspension and sealing together. The expansion tool is the variable diameter structure, the expansion rate of the expansion tube is increased, and the expansion tube can be suitable for the irregular situation of a borehole. The expansion time of rubber encountering water can be controlled, and the construction process does not need to inject cement.
Description
Technical field
The utility model is a kind of expansion tube suspension sealing device that is used for barefoot interval.
Background technology
All there are the many newly-increased blocks and the exploration and development in complicated exploratory area in annual China, because newly-increased block geological structure is understood shortcoming and complicated exploratory area geological condition complexity, and the large-scale popularization of drilling well new technologies such as deep-well, ultradeep well, high angle hole, horizontal well, Multilateral Wells, the little gap of slim-hole well is used, because formation fracture pressure is low unusually, the rock stratum degree of porosity is big, good penetrability or the leakage incident that has geologic(al) factor such as crack, solution cavity or human factor to cause are very frequent in drilling process; Boring the chance of meeting complicated interval also increases greatly, as the packing undergauge, cave in, leakage or high pressure zone etc., bring great inconvenience to drilling process, complicated interval drilling problem intractability also increases greatly, can't finish if deal with the probing purpose that can cause exploratory well improperly, even cause great down-hole accident.The drilling problem of complicated layer is seriously restricting the exploration and development of oil well, badly influences the safety and the speed of drilling engineering, has prolonged drilling well and well construction period.
Utilize the solid expansion pipe technology can well solve the drilling problem of complicated interval, as the packing undergauge, cave in, leakage or high pressure zone etc., be lowered to solid expansion pipe as emergent sleeve pipe at complicated interval, complicated interval is carried out leak stopping or packing operation, can accomplish to reduce effectively to continue the potential risks that may exist in the drilling process, reach the probing purpose.
Bulged tube technology is that expansion tube is lowered to the complexity layer, makes it that radial plastic deformation take place with bloat tool, and the back expansion tube outer wall that expands is close to the borehole wall, and the upper and lower side sulfuration of close complicated interval has rubber sealing element, thereby reaches leak stopping or packing operation purpose.Therefore, the research expansion tube sealed suspension device that is used for the bore hole stratum creeps into the safety of complicated interval and has crucial meaning.
Summary of the invention
A kind of expansion tube suspension sealing device that is used for barefoot interval of the utility model, technical problem to be solved is to expand distortion by using expansion tube in complicated layer position, make body up and down the rubber sealing element at two ends complicated layer is carried out effective shutoff, realize leak stopping or packing operation purpose, thereby effectively improve bit speed, shorten drilling well and well construction period.The purpose of this utility model is to provide a kind of expansion tube suspension sealing device that is used for barefoot interval to the scene.
The utility model is a kind of inflatable suspension sealing device that complicated layer is carried out effective leak stopping or packing operation at barefoot interval, but is made up of solid expansion pipe reducing bloat tool, expansion system, rubber element and expansion starter.The expansion starter is positioned at the lower end of expansion system, constitute the wiper seal space of expansion system, the guide shoe of expansion starter lower end is for can bore material, but but the reducing bloat tool is a variable-diameter structure, be positioned at the expansion starter, be sealed and matched but be between reducing bloat tool and solid expansion pipe, guide shoe and the solid expansion pipe, in the rated pressure scope, pressure release can not take place; Solid expansion pipe up and down the two ends sulfuration rubber sealing element, rubber sealing element are arranged is loop configuration, but meet the water self-expanding, its external diameter greater than the external diameter of solid expansion pipe less than the barefoot interval borehole diameter.Use the central tube instrument that the solid expansion pipe system is lowered into complicated layer position, make rubber sealing element on the solid expansion pipe be positioned at position from some meters of complicated layer up-and-down boundaries, permanent plastic deformation is radially being taken place in expansion tube, rubber on the expansion tube body closely contacts with the borehole wall up and down of complicated interval, thereby in the bore hole section complicated layer is played the packing effect.
Advantage of the present utility model is:
1, need not to be hanging to the upper strata sleeve pipe for the expansion tube that is lowered to, near the operation of can be directly the complicated layer of barefoot interval, expanding, make it to hang and be sealed on the bore hole borehole wall, the function that integrates hanger and packer, construction risk and difficulty of construction have been reduced, reduce construction cost, and shortened the time and the well construction period of back follow-up hole.
2, but the bloat tool in the expansion system is a variable-diameter structure, reduced the external diameter of expansion tube lower end expansion starter part, guarantee that expansion tube can be lowered into the target zone position smoothly, but the reducing bloat tool makes solid expansion pipe can adapt to the hole anomaly situation, is close to the bore hole borehole wall after the expansion.
But 3, the reducing bloat tool in the expansion system, can regulate its external diameter size according to pressure condition, increased the expansion rate of expansion tube, expansion tube after further having reduced to expand and the annular space between the borehole wall, thus effectively improve shutoff or the packing effect of expansion tube to complicated layer.
4, work progress need not cementing.Expansion tube body upper and lower side vulcanizes respectively rubber element, and after the expansion construction finished, the rubber sealing element on the expansion tube expanded with expansion tube, guarantees that rubber layer closely contacts with the borehole wall about in the of complicated layer, thereby plays the purpose of shutoff or the complicated layer of packing.Can adopt chance water self-expanding rubber for improving sealing effectiveness, the rubber water-swellable time can be controlled in 3～5 days.
Description of drawings
Accompanying drawing is depicted as a kind of expansion schematic diagram that is used for the expansion tube suspension sealing device of barefoot interval.
The expansion tube suspension sealing device of Fig. 1 barefoot interval is lowered to process
But Fig. 2 reducing bloat tool reducing and expansion tube suspension sealing device expansion shutoff process
1. but the complicated layer of solid expansion pipe 2. reducing bloat tools, 3. expansion systems 4. rubber elements, 5. expansion starters 6. 7. central tube 8. guide shoes
The specific embodiment
Now the utility model will be further described in conjunction with Figure of description.
As shown in Figure 1 and Figure 2, after bore meeting complicated interval, use the reaming hole instrument to complicated layer 6 and carry out reaming hole in some meters the scope up and down earlier, what guarantee expansion system 3 is lowered to and obtains bigger well smoothly.Be lowered to expansion system 3 in complicated layer 6 position, make rubber sealing element 4 on the solid expansion pipe 1 be positioned at the position of some meters of complicated layer 6 up-and-down boundaries, to guarantee the complicated layer 6 of effective shutoff or packing.Expansion starter 5 is positioned at the lower end of expansion system 3, constitutes the wiper seal space of expansion system 3, but utilizes hydraulic pressure to make reducing bloat tool 2 that reducing take place in expansion starter 5 by central tube 7, and expansion starter 5 is expanded.Continue to suppress, make the bloat tool 2 behind the reducing under the effect of hydraulic pressure or mechanical force, begin to move upward, but this moment, radially permanent plastic deformation took place in solid expansion pipe 1 under the effect of reducing bloat tool 2, solid expansion pipe 1 outer field vulcanized rubber 4 in lower end is adjacent to the borehole wall, expand annular space between the construction back rubber layer 4 shutoff solid expansion pipes 1 and the borehole wall, thus reach the purpose of the complicated layer 6 of shutoff.If adopt hydro-expansive rubber 4, expand finish after, trip out central tube, hydro-expansive rubber 4 issues in the effect of formation water is conigenous expansion, further the effective annular space between the shutoff solid expansion pipe 1 and the borehole wall; Meeting water self-expanding rubber 4 mainly is made up of trilaminate materials such as efficient hydro-expansive rubber, weak hydro-expansive rubber, make-up shielding materials, meet the expansion time of water self-expanding rubber 4 and can select different prescriptions to be controlled, may be selected to be and meeting the water self-expanding time is 3～5 days.The guide shoe 8 of expansion starter 5 lower ends, after following bit drills is fallen starter guide shoe 8, continues to creep into after 2 shutoff of complicated layer or packing are finished for can bore material.
Claims (4)
1, a kind of expansion tube suspension sealing device that is used for barefoot interval, it is by solid expansion pipe [1], but reducing bloat tool [2], expansion system [3], rubber element [4] and expansion starter [5] are formed, it is characterized in that: expansion starter [5] is positioned at the lower end of expansion system [3], constitute the wiper seal space of expansion system [3], the guide shoe [8] of expansion starter [5] lower end is for can bore material, but reducing bloat tool [2] but be variable-diameter structure, be positioned at expansion starter [5], solid expansion pipe [1] up and down two ends sulfurations rubber sealing element [4] is arranged, rubber sealing element [4] is a loop configuration, its external diameter greater than the external diameter of solid expansion pipe [1] less than the barefoot interval borehole diameter.
2, a kind of expansion tube suspension sealing device that is used for barefoot interval as claimed in claim 1, it is characterized in that: rubber sealing element [4] mainly is made up of trilaminate materials such as efficient hydro-expansive rubber, weak hydro-expansive rubber, make-up shielding materials.
3, a kind of expansion tube suspension sealing device that is used for barefoot interval as claimed in claim 1 is characterized in that: be sealed and matched but be between reducing bloat tool [2] and solid expansion pipe [1], guide shoe [8] and the solid expansion pipe [1].
4, a kind of expansion tube suspension sealing device that is used for barefoot interval as claimed in claim 1 is characterized in that: solid expansion pipe [1] hangs over barefoot interval by expanding directly to sit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200184005U CN201202429Y (en) | 2008-03-13 | 2008-03-13 | Expansion tube hanging seal device for open hole section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200184005U CN201202429Y (en) | 2008-03-13 | 2008-03-13 | Expansion tube hanging seal device for open hole section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201202429Y true CN201202429Y (en) | 2009-03-04 |
Family
ID=40424743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200184005U Expired - Lifetime CN201202429Y (en) | 2008-03-13 | 2008-03-13 | Expansion tube hanging seal device for open hole section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201202429Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927333A (en) * | 2020-07-22 | 2020-11-13 | 中国石油天然气股份有限公司 | Well structure under geological condition with fault and construction method thereof |
| CN111946303A (en) * | 2020-08-17 | 2020-11-17 | 中国石油天然气股份有限公司 | Well body structure for big belly well hole |
| CN111963071A (en) * | 2020-08-17 | 2020-11-20 | 中国石油天然气股份有限公司 | Well body structure that sleeve pipe level was extended |
-
2008
- 2008-03-13 CN CNU2008200184005U patent/CN201202429Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927333A (en) * | 2020-07-22 | 2020-11-13 | 中国石油天然气股份有限公司 | Well structure under geological condition with fault and construction method thereof |
| CN111946303A (en) * | 2020-08-17 | 2020-11-17 | 中国石油天然气股份有限公司 | Well body structure for big belly well hole |
| CN111963071A (en) * | 2020-08-17 | 2020-11-20 | 中国石油天然气股份有限公司 | Well body structure that sleeve pipe level was extended |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SINOPEC OILFIELD SERVICE CORPORATION Free format text: FORMER OWNER: WELL-DRILLING TECHNOLOGY INST., SHENGLI PETROLEUM ADMINISTRATION, SINOPEC Effective date: 20150625 Owner name: CHINA PETROLEUM + CHEMICAL VICTORY OIL ENGINEERING Effective date: 20150625 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150625 Address after: 100029 Beijing Chaoyang District Hui Xin a No. twelve layer 6 Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Patentee after: Drilling Well Technology Institute, Shengli Petroleum Engineering Co., Ltd., SINOPEC Address before: 257017 No. 236, North Road, Dongying District, Shandong, Dongying Patentee before: Well-Drilling Technology Inst., Shengli Petroleum Administration, SINOPEC |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090304 |