CN201794524U - Anti-ice waterproof casing combined structure - Google Patents
Anti-ice waterproof casing combined structure Download PDFInfo
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- CN201794524U CN201794524U CN2010201762654U CN201020176265U CN201794524U CN 201794524 U CN201794524 U CN 201794524U CN 2010201762654 U CN2010201762654 U CN 2010201762654U CN 201020176265 U CN201020176265 U CN 201020176265U CN 201794524 U CN201794524 U CN 201794524U
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- waterproof casing
- internal layer
- layer waterproof
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- conductor tube
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Abstract
The utility model discloses an anti-ice waterproof casing combined structure, which comprises a surface casing, an outer waterproof casing and an inner waterproof casing, wherein the outer waterproof casing is sleeved outside the surface casing, the inner waterproof casing is arranged between the outer waterproof casing and the surface casing corresponding to the range of ice regions, the length of the inner waterproof casing is smaller than the length of the outer waterproof casing and is larger than the thickness of the ice regions so that the thickness of an outer waterproof casing can be increased on local range of the ice regions, and annular parts between the outer waterproof casing and the inner waterproof casing and annular parts between the inner waterproof casing and the surface casing are all cast and consolidated by cement. The inner waterproof casing and the surface waterproof casing are fixedly connected, thereby avoiding the defects that the hammer depth of the inner waterproof casing is not easy to be controlled, reducing material usage simultaneously, and increasing the flexural rigidity of local waterproof casing in the range of ice regions. The anti-ice waterproof casing combined structure can effectively increase the anti-ice ability of the waterproof casing, can not affect drilling period, and can save a great quantity of engineering cost.
Description
Technical field
The utility model relates to a kind of offshore oil engineering equipment, especially a kind of anti-icing conductor tube composite structure that is used for the anti-ice of offshore drilling waterproof casing.
Background technology
For offshore drilling, the waterproof casing important drilling equipment that is absolutely necessary.Winter, the ice formation span was big owing to there is sea ice to cover, and ice power is big, and is big to top layer waterproof casing side direction active force, so the anti-ice ability of top layer waterproof casing plays significant effects for offshore drilling safety work in winter.At present, the conventional method of the anti-ice ability of raising top layer riser pipe is:
One, adopt double-deck riser pipe sleeve structure, as shown in Figure 1, promptly outer employing diameter is 76.2 centimetres an outer waterproof casing 1 ', internal layer employing diameter is 60.96 centimetres an internal layer waterproof casing 2 ', at the sheathed again surface pipe 3 ' in the inside of internal layer waterproof casing 2 ', the length of two-layer waterproof casing all is to below the mud line 50 meters from well head waterborne.This structure types is lowered to when construction carrying out internal layer waterproof casing 2 ', and internal layer waterproof casing 2 ' hammer is gone into the degree of depth and is difficult to control, and can waste a large amount of internal layer waterproof casings 2 ', and engineering time and expense can increase greatly.
Two, adopt individual layer waterproof casing structure, increase a jacket leveling course in addition, use the jacket leveling course to set upright the individual layer waterproof casing, play the anti-ice ability that improves waterproof casing.This structure types has increased the workload that jacket is built and constructed, and construction and operating cost increase huge.
Three, adopt large scale waterproof casing structure, improve the anti-ice ability of waterproof casing, this structure types will increase the rolled steel dosage of waterproof casing, and the operating cost of waterproof casing is increased greatly.
Summary of the invention
At the problems referred to above, the purpose of this utility model provides a kind of anti-icing conductor tube composite structure, it can strengthen the rigidity and the bending resistance of the anti-lateral stress of top layer waterproof casing at the local top layer waterproof casing thickness that increases of ice formation scope, improves the anti-ice ability of waterproof casing effectively.
For achieving the above object, the utility model is taked following technical scheme: a kind of anti-icing conductor tube composite structure, comprise that a surface pipe, is set in the outer waterproof casing outside the described surface pipe, it is characterized in that: corresponding to the ice formation thickness range, folder is established an internal layer waterproof casing between described outer waterproof casing and surface pipe; The length of described internal layer waterproof casing is less than the length of described outer waterproof casing and greater than described ice formation thickness; Annular space part between described outer waterproof casing and the internal layer waterproof casing, and the part of the annular space between described internal layer waterproof casing and the surface pipe is all fixed with cement casting.
Fixedlying connected with described surface pipe respectively in the upper and lower of described internal layer waterproof casing, and pierces simultaneously with described surface pipe.
Described internal layer waterproof casing two ends are threaded with surface pipe by jointing respectively.
Stationary pipes and external fixation pipe in described jointing comprises, be arranged at intervals with a plurality of junction plates between stationary pipes and the external fixation pipe in described, be formed with pod apertures between the adjacent junction plate, the upper end of stationary pipes is connected with described surface pipe by screw thread in described, and the lower end of described external fixation pipe is connected with described internal layer waterproof casing by screw thread.
Also be provided with plural reinforcing rib between the interior stationary pipes of described jointing and the external fixation pipe.
Described internal layer waterproof casing top exceeds 3～8 meters on sea level, and described internal layer waterproof casing length under water is 4～8 meters, and the best is long 10 meters of a described internal layer waterproof casing, and it is waterborne, length is 5 meters under water.
The thickness range of described internal layer waterproof casing is 20～51mm, and the best is 25mm.
The internal diameter of described outer waterproof casing can be selected 36 inches or 30 inches, and the internal diameter of internal layer waterproof casing 2 can be selected 24 inches or 20 inches, and the internal diameter of surface pipe 3 can be selected
The inch or
Inch can suitably make up during enforcement as required.
The utility model is owing to take above technical scheme, and it has the following advantages:
1, the length of the internal layer waterproof casing of Jian Huaing is controlled at the ice formation scope, be equivalent to increase the thickness of the local outer waterproof casing of ice formation scope, thereby improved the rigidity of outer waterproof casing local anti-lateral stress in the scope of ice formation effectively, and increased the rigidity of the anti-lateral stress of the local surface pipe corresponding, thereby improve the anti-ice ability of integral body of waterproof casing with the ice formation scope.
2, the upper and lower of the internal layer waterproof casing of Jian Huaing is connected by jointing with surface pipe, and internal layer waterproof casing top is connected with surface pipe by top connection, and internal layer waterproof casing bottom is connected with surface pipe by lower contact.The internal layer waterproof casing is lowered to simultaneously with surface pipe, annular space fixes so that cement is fixed between internal layer waterproof casing and the surface pipe, thereby avoided that the internal layer waterproof casing pierces the uppity shortcoming of the degree of depth in the prior art, not only be convenient to construction, and reduced the shell material consumption.
3, at the sea ice active force that winter, the top layer waterproof casing was subjected to, simplify the waterproof casing combining structure, in order to opposing sea ice effect in winter, can guarantee drillng operation safety in winter.
4, do not have influence to boring completion period, and saved a large amount of engineering cost etc.
Description of drawings
Fig. 1 is double-deck waterproof casing structural representation commonly used;
Fig. 2 is the application schematic diagram of the specific embodiment of anti-icing conductor tube composite structure of the present utility model;
Fig. 3 is the schematic top plan view of Fig. 2;
Fig. 4 is the schematic side view of the used jointing of anti-icing conductor tube composite structure of the present utility model;
Fig. 5 is the perspective view of the used jointing of anti-icing conductor tube composite structure of the present utility model.
The specific embodiment
For to problem to be solved in the utility model, the technical scheme taked of dealing with problems and the beneficial effect of taking scheme to produce have more clearly and understand, and now contrasts the description of drawings specific embodiment of the present utility model.
As shown in Figure 1, a kind of anti-icing conductor tube composite structure of the present utility model, essence is a kind of waterproof casing structure of local thickening, is a kind of double-deck waterproof casing structure of simplification.It comprises: an outer waterproof casing 1, an internal layer waterproof casing 2, a surface pipe 3.Outer waterproof casing 1 is sheathed on outside the surface pipe 3; Internal layer waterproof casing 2 is arranged between outer waterproof casing 1 and the surface pipe 3 corresponding to ice formation thickness 4.The length of internal layer waterproof casing 2 is less than the length of outer waterproof casing 1 and greater than ice formation thickness, so that in the scope of ice formation, the part increases the thickness of outer waterproof casing 1.Annular space part between outer waterproof casing 1 and the internal layer waterproof casing 2, and the part of the annular space between internal layer waterproof casing 2 and the surface pipe 3 is all with the fixed (not shown) of cement casting.
The utility model has been simplified the internal layer waterproof casing structure of prior art; internal layer waterproof casing 2 length after the simplification are controlled in the ice formation thickness 4; active force at the sea ice in winter; the utility model has been equivalent to increase the thickness of the local outer waterproof casing 1 in the scope of ice formation; thereby improved the rigidity of outer waterproof casing 1 local anti-lateral stress in the scope of ice formation effectively, increased protection surface pipe 3.
In the lump with reference to Fig. 2～Fig. 5, near the internal layer waterproof casing 2 that is arranged with simplification outside near the local surface pipe 3 the sea level, fixedly connected with surface pipe 3 respectively with the bottom in the upper end of internal layer waterproof casing 2, so that when waterproof casing was installed, internal layer waterproof casing 2 pierced simultaneously with surface pipe 3.Wherein among the embodiment, fixedly connected with surface pipe 3 by jointing 5 respectively with the bottom in the upper end of internal layer waterproof casing 2, the structure of jointing 5 and be: stationary pipes 6 and external fixation pipe 7 in jointing 5 comprises with their connected mode, be connected with a plurality of junction plates 8 at interval between interior stationary pipes 6 and the external fixation pipe 7, be formed with pod apertures 9 between the adjacent junction plate 8.All have screw thread on interior stationary pipes 6 and the external fixation pipe 7, interior stationary pipes 6 and surface pipe 3 bolts, external fixation pipe 7 and internal layer waterproof casing 2 bolts, the screw thread on jointing 5, surface pipe 3 and the internal layer waterproof casing 2 is preferable should to meet the API standard criterion.
Owing to be formed with pod apertures 9 between the adjacent junction plate 8 of the utility model, pod apertures 9 can make between internal layer waterproof casing 2 inside and outside and be communicated with, thus can satisfy fluid upper and lower flow and cement paste on backflow moving.
Preferably, also be provided with a plurality of reinforcing ribs 10 between the interior stationary pipes 6 of jointing 5 and the external fixation pipe 7, thereby it is more firm that internal layer waterproof casing 2 is connected with surface pipe 3.Among the utility model Fig. 4, the embodiment shown in Figure 5, jointing 5 is provided with eight junction plates 8 and four reinforcing ribs 10.
After the anti-icing conductor tube composite structure installation of the present utility model, annular space between outer waterproof casing 1 and the internal layer waterproof casing 2, and the annular space between internal layer waterproof casing 2 and the surface pipe 3 is all fixed with the cast of cement (not shown), to avoid prior art internal layer waterproof casing 2 to pierce the uppity shortcoming of the degree of depth, and reduced the shell material consumption, increased the bending rigidity of the local outer waterproof casing 1 of ice formation scope.The specific implementation process is:
1) after outer waterproof casing 1 is squeezed into, use a drill bit to get out a well from outer waterproof casing 1 the inside, the degree of depth of well is preferably the length that is lowered to less times greater than surface pipe 3, and bit diameter is less than the internal diameter of outer waterproof casing 1, and greater than surface pipe 3 external diameters.
2) bored well after, the combining structure of the internal layer waterproof casing that combines in advance 2 and surface pipe 3 is lowered to well.
3) under the combining structure good after, squeeze into a certain amount of prepad fluid earlier from surface pipe 3 inside the annular space of surface pipe 3 outsides cleaned, squeeze into cement paste then, cement paste is by returning the annular space between surface pipe 3 and the well on surface pipe 3 bottoms.
4) utilize displacement fluid that the cement paste of surface pipe 3 inside is all ejected surface pipe 3 inside, wherein, the consumption of cement paste will calculate through science, guarantee cement paste between surface pipe 3 and well in the annular space on return and highly reach at least 3 meters positions more than internal layer waterproof casing 2 tops.Because the effect of pod apertures 9 just has been full of cement paste between the surface pipe 3 of internal layer waterproof casing 2 and inside, also all be full of cement paste between outer waterproof casing 1 and the internal layer waterproof casing 2 like this.After waiting for that cement paste solidifies certain hour, it is fixed to have formed cement between these three tubing strings, thereby the anti-ice ability of this section pipe string combination structure is improved greatly.
Each specifications and models of outer waterproof casing 1 of the present utility model, internal layer waterproof casing 2 and surface pipe 3, dimensional parameters can be provided with according to concrete performance.For example, the internal diameter of outer waterproof casing 1 can be selected 36 inches or 30 inches, and the internal diameter of internal layer waterproof casing 2 can be selected 24 inches or 20 inches, and the internal diameter of surface pipe 3 can be selected
The inch or
The inch, can suitably make up as required during enforcement, in the specific embodiment of the present utility model, outer waterproof casing 1, internal layer waterproof casing 2, surface pipe adopt respectively 30 inches, 20 inches,
Inch is to guarantee preferable anti-ice ability.
The length of internal layer waterproof casing 2 is greater than sea ice thickness in the utility model, and be provided with corresponding to the ice formation scope, internal layer waterproof casing 2 length should be controlled at a zone of reasonableness, calculate and the stability analysis result by intensity, preferably, the top of the internal layer waterproof casing 2 after installing exceeds 3～8 meters on sea level, and the length under water of internal layer waterproof casing 2 should be controlled at 5～8 meters.In one embodiment, the length of internal layer waterproof casing 2 is about 10 meters, and it is waterborne, length is about about 5 meters under water, so that preferable intensity and stability is provided.In addition, the wall thickness of internal layer waterproof casing 2 should satisfy anti-ice requirement of strength, and thickness range is generally at 20～51mm, and in one embodiment, the thickness of internal layer waterproof casing 2 is 25mm.
The above only is the schematic specific embodiment of the utility model, is not in order to limit protection domain of the present utility model.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and technical scheme and modification all should be within the scopes of the utility model protection.
Claims (13)
1. anti-icing conductor tube composite structure, comprise that a surface pipe, is set in the outer waterproof casing outside the described surface pipe, it is characterized in that: corresponding to the ice formation thickness range, folder is established an internal layer waterproof casing between described outer waterproof casing and surface pipe;
The length of described internal layer waterproof casing is less than the length of described outer waterproof casing and greater than described ice formation thickness;
Annular space part between described outer waterproof casing and the internal layer waterproof casing, and the part of the annular space between described internal layer waterproof casing and the surface pipe is all fixed with cement casting.
2. anti-icing conductor tube composite structure as claimed in claim 1 is characterized in that: fixedly connected with described surface pipe respectively in the upper and lower of described internal layer waterproof casing, and pierce simultaneously with described surface pipe.
3. anti-icing conductor tube composite structure as claimed in claim 1 or 2 is characterized in that: described internal layer waterproof casing two ends are threaded with surface pipe by jointing respectively.
4. anti-icing conductor tube composite structure as claimed in claim 3, it is characterized in that, stationary pipes and external fixation pipe in described jointing comprises, be arranged at intervals with a plurality of junction plates between stationary pipes and the external fixation pipe in described, be formed with pod apertures between the adjacent junction plate, the upper end of stationary pipes is connected with described surface pipe by screw thread in described, and the lower end of described external fixation pipe is connected with described internal layer waterproof casing by screw thread.
5. anti-icing conductor tube composite structure as claimed in claim 4 is characterized in that: also be provided with plural reinforcing rib between the interior stationary pipes of described jointing and the external fixation pipe.
6. as claim 1,2,4,5 arbitrary described anti-icing conductor tube composite structures, it is characterized in that: described internal layer waterproof casing top exceeds 3～8 meters on sea level, and described internal layer waterproof casing length under water is 4～8 meters.
7. anti-icing conductor tube composite structure as claimed in claim 3 is characterized in that: described internal layer waterproof casing top exceeds 3～8 meters on sea level, and described internal layer waterproof casing length under water is 4～8 meters.
8. anti-icing conductor tube composite structure as claimed in claim 6 is characterized in that: long 10 meters of described internal layer waterproof casing, and it is waterborne, length is 5 meters under water.
9. as claim 1,2,4,5 arbitrary described anti-icing conductor tube composite structures, it is characterized in that: the thickness range of described internal layer waterproof casing is 20～51mm.
10. anti-icing conductor tube composite structure as claimed in claim 3 is characterized in that: the thickness range of described internal layer waterproof casing is 20～51mm.
11. anti-icing conductor tube composite structure as claimed in claim 9 is characterized in that: the thickness of described internal layer waterproof casing is 25mm.
12. as claim 1,2,4,5 arbitrary described anti-icing conductor tube composite structures, it is characterized in that: the internal diameter of described outer waterproof casing is 30 inches, the internal diameter of described internal layer waterproof casing is 20 inches, and the internal diameter of described surface pipe is
Inch.
13. anti-icing conductor tube composite structure as claimed in claim 3 is characterized in that: the internal diameter of described outer waterproof casing is 30 inches, and the internal diameter of described internal layer waterproof casing is 20 inches, and the internal diameter of described surface pipe is
Inch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201762654U CN201794524U (en) | 2010-04-28 | 2010-04-28 | Anti-ice waterproof casing combined structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201762654U CN201794524U (en) | 2010-04-28 | 2010-04-28 | Anti-ice waterproof casing combined structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201794524U true CN201794524U (en) | 2011-04-13 |
Family
ID=43849439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201762654U Expired - Lifetime CN201794524U (en) | 2010-04-28 | 2010-04-28 | Anti-ice waterproof casing combined structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201794524U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812975A (en) * | 2010-04-28 | 2010-08-25 | 中国海洋石油总公司 | Anti-icing conductor tube composite structure |
| CN109441371A (en) * | 2018-11-26 | 2019-03-08 | 中国石油大学(北京) | Inner-rotary type conduit bearing capacity stiffening device and its application method |
-
2010
- 2010-04-28 CN CN2010201762654U patent/CN201794524U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812975A (en) * | 2010-04-28 | 2010-08-25 | 中国海洋石油总公司 | Anti-icing conductor tube composite structure |
| CN101812975B (en) * | 2010-04-28 | 2012-07-04 | 中国海洋石油总公司 | Anti-icing conductor tube composite structure |
| CN109441371A (en) * | 2018-11-26 | 2019-03-08 | 中国石油大学(北京) | Inner-rotary type conduit bearing capacity stiffening device and its application method |
| CN109441371B (en) * | 2018-11-26 | 2023-12-08 | 中国石油大学(北京) | Internal rotation type catheter bearing capacity reinforcing device and application method thereof |
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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: 20110413 Effective date of abandoning: 20120704 |