CN209163740U - Conduit bearing capacity stiffening device - Google Patents
Conduit bearing capacity stiffening device Download PDFInfo
- Publication number
- CN209163740U CN209163740U CN201821958168.3U CN201821958168U CN209163740U CN 209163740 U CN209163740 U CN 209163740U CN 201821958168 U CN201821958168 U CN 201821958168U CN 209163740 U CN209163740 U CN 209163740U
- Authority
- CN
- China
- Prior art keywords
- piece
- stopping
- bearing capacity
- ontology
- conduit
- 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.)
- Active
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model provides a kind of conduit bearing capacity stiffening device, it include: reinforcing mechanisms, it, which has, reinforces ontology and is connected to the upper stopping-off piece for reinforcing body lower part, is equipped at intervals with multiple stiffener plates along the circumferencial direction for reinforcing ontology, multiple stiffener plates are connected with upper stopping-off piece；Wherein, upper stopping-off piece is equipped at intervals with multiple upper perforated portions along its circumferencial direction；Interconnecting piece has pin end and box end, and box end is connected to the upper end for reinforcing ontology with being able to rotate, and pin end is connected to the lower end for reinforcing ontology with being able to rotate；Lower stopping-off piece, is socketed on pin end, and lower stopping-off piece is located at the lower section of upper stopping-off piece, is equipped at intervals with multiple lower perforated portions along its circumferencial direction on lower stopping-off piece, and multiple lower perforated portions and multiple upper perforated portions are oppositely arranged up and down.The utility model is used to increase active area between riser pipe or surface conductor pipe and seafloor soil, to increase the bearing capacity of conduit, to guarantee the safety and efficiently of field survey development operation.
Description
Technical field
The utility model relates to marine oil and gas to be drilled well technical field more particularly to a kind of conduit bearing capacity stiffening device.
Background technique
As country increases the dynamics of oil-gas exploration and development, the region of oil-gas exploration gradually turns to coastal waters phytal zone by land
Domain and off-lying sea deepwater regions, and the region emphasis of the following oil and gas development is also ocean shallow water and ocean deepwater zone.
Well, production operation are drilled to Yu Haiyang's shallow water area, all be unable to do without the water proof of riser pipe and to blowout prevention waterborne
Device (BOP) or the supporting role for adopting oil/gas tree；And ocean deepwater zone is drilled well, production operation, be unable to do without surface conductor pipe pair
Subsea blowout preventer (BOP) or the supporting role for adopting oil/gas tree.Riser pipe or surface conductor pipe to top preventer (BOP) or are adopted
The bearing capacity of oil/gas tree mostlys come from the resistance between conduit outer wall side and seafloor soil and between conduit bottom face and seafloor soil
Power, the active area between the size and conduit and seafloor soil of bearing capacity is related, conduit driving depth and or conduit diameter, wall thickness
More big then bearing capacity is also bigger.
, usually can not be too deep by conduit tripping in but due to technology, cost limitation, cause conduit in subsequent work
Usually the phenomenon that sharply sinking can occur because of Lack of support during industry, cause to be drilled well, production operation can not be normally carried out,
The a large amount of economic loss even marine eco-environment is caused to pollute simultaneously.
So the bearing capacity of riser pipe and surface conductor pipe is the key that marine oil gas field is drilled well, in production operation,
Affect the job scheduling and success or failure of a well.
Utility model content
The purpose of the utility model is to provide a kind of conduit bearing capacity stiffening devices, lead for increasing riser pipe or surface layer
Effective active area between pipe and seafloor soil, to increase the bearing capacity of conduit, to guarantee field survey development operation
It is safe and efficient.
Following technical proposal can be used to realize in the above-mentioned purpose of the utility model:
The utility model provides a kind of conduit bearing capacity stiffening device, comprising:
Reinforcing mechanisms have and reinforce ontology and be connected to the upper stopping-off piece for reinforcing body lower part, along the reinforcement
The circumferencial direction of ontology is equipped at intervals with multiple stiffener plates, and the multiple stiffener plate is connected with the upper stopping-off piece；Wherein, institute
It states stopping-off piece and is equipped at intervals with multiple upper perforated portions along its circumferencial direction；
Interconnecting piece has pin end and box end, and the box end is connected to the upper end for reinforcing ontology with being able to rotate,
The pin end is connected to the lower end for reinforcing ontology with being able to rotate；
Lower stopping-off piece, is socketed on the pin end, and the lower stopping-off piece is located at the lower section of the upper stopping-off piece, under described
Multiple lower perforated portions are equipped at intervals with along its circumferencial direction on stopping-off piece, the multiple lower perforated portion can be with the multiple upper perforated portion
It is oppositely arranged up and down.
In the embodiments of the present invention, the upper perforated portion includes along the radial direction interval of the upper stopping-off piece
The multiple upper perforation being arranged, the lower perforated portion include along the lower stopping-off piece radial direction it is spaced it is multiple under wear
Hole, the multiple lower perforation can be oppositely arranged up and down with the multiple upper perforation.
In the embodiments of the present invention, along the radially outward direction of the upper stopping-off piece, the upper perforation
Diameter is sequentially increased；Along the radially outward direction of the lower stopping-off piece, the diameter of the lower perforation is sequentially increased.
In the embodiments of the present invention, the stiffener plate be welded to connect the upper stopping-off piece upper surface and
In the box end.
In the embodiments of the present invention, the stiffener plate is the plate of shape in a rectangular trapezoid.
In the embodiments of the present invention, the inner wall for reinforcing ontology is equipped with annular accommodation groove.
In the embodiments of the present invention, stage portion, the stage portion are formed with above the annular accommodation groove
It is interior to be equipped at intervals with multiple card slots along the circumferencial direction for reinforcing ontology.
In the embodiments of the present invention, the threaded upper ends of the pin end are connected to the lower end for reinforcing ontology
Inside.
The characteristics of conduit bearing capacity stiffening device of the utility model and advantage are:
1, the conduit bearing capacity stiffening device is located at the middle part and/or tail portion of conduit, can it is multiple and meanwhile interval be connected to
Between conduit, can also independent one be connected between conduit, that is, the conduit bearing capacity stiffening device can be repeated several times use,
It one or more can also use simultaneously, to increase the bearing capacity of conduit to the full extent, while be not in that device tripping in is tired
Difficult problem；The utility model can reduce the driving depth of conduit when in use, save activity duration and cost, structure letter
It is single, it is low in cost, it is easy to use, and easy to operate, high reliablity.
2, the effective active area between tubing string and seafloor soil is increased by using conduit bearing capacity stiffening device, it can be with
The bearing capacity for improving ocean shallow water area riser pipe and ocean deepwater zone surface conductor pipe, prevents later period operation process
In, since riser pipe or surface conductor pipe Lack of support cause riser pipe or surface conductor pipe to sink, leads to well head unstability, bores
Completion practice can not be normally carried out.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the main view of the conduit bearing capacity stiffening device of the utility model.
Fig. 2 is the birds-eye perspective of the conduit bearing capacity stiffening device of the utility model.
Fig. 3 is the perspective view of the conduit bearing capacity stiffening device of the utility model, wherein the upper perforated portion of stopping-off piece on this
It is respectively provided under two upper perforation and two and perforates with the lower perforated portion of lower stopping-off piece.
Drawing reference numeral explanation: 1, reinforcing mechanisms；11, reinforce ontology；12, upper stopping-off piece；121, upper perforated portion；1211, on
Perforation；13, stiffener plate；14, annular accommodation groove；15, stage portion；151, card slot；2, interconnecting piece；21, pin end；22, female thread
End；3, lower stopping-off piece；31, lower perforated portion；311, lower perforation.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1 to Figure 3, the utility model provides a kind of conduit bearing capacity stiffening device, including reinforcing mechanisms 1,
Interconnecting piece 2 and lower stopping-off piece 3, in which: reinforcing mechanisms 1 have reinforcement ontology 11 and are connected to the upper of reinforcement 11 lower part of ontology
Stopping-off piece 12 is equipped at intervals with multiple stiffener plates 13, the multiple stiffener plate 13 along the circumferencial direction for reinforcing ontology 11
It is connected with the upper stopping-off piece 12；Wherein, the upper stopping-off piece 12 is equipped at intervals with multiple upper perforated portions 121 along its circumferencial direction；
Interconnecting piece 2 has pin end 21 and box end 22, and the box end 22 is connected to the upper end for reinforcing ontology 11 with being able to rotate,
The pin end 21 is connected to the lower end for reinforcing ontology 11；Lower stopping-off piece 3 is socketed on the pin end 21, is added under described
Strong disk 3 is located at the lower section of the upper stopping-off piece 12, and the lower stopping-off piece 3 is equipped at intervals with multiple lower perforated portions along its circumferencial direction
31, the multiple lower perforated portion 31 can be oppositely arranged with the multiple upper about 121 perforated portion.
The utility model is to solve riser pipe or surface conductor pipe Lack of support well head is caused to sink to influencing operation safety
The problem of with timeliness, devises a kind of conduit bearing capacity stiffening device, with increase riser pipe or surface conductor pipe and seafloor soil it
Between effective active area, to increase the bearing capacity of conduit, to guarantee the safety and efficiently of field survey development operation.
Specifically, interconnecting piece 2 has pin end 21 and box end 22, and box end 22, which is threaded in, reinforces the upper of ontology 11
End, is located at the upper surface center for reinforcing ontology 11, which opposite can reinforce 11 rotary setting of ontology, the box end 22
It can be connect with the pin end of riser pipe or surface conductor pipe by thread seal；The threaded upper ends of pin end 21 are connected to reinforcement originally
The lower end inside of body 11, is located at the lower end surface center for reinforcing ontology 11, which can set relative to the rotation of ontology 11 is reinforced
It sets, the lower end of the pin end 21 can be connect with the box end of riser pipe or surface conductor pipe by thread seal.The interconnecting piece 2 is main
It to be attached by screw thread and conduit (that is, riser pipe or surface conductor pipe).In the other embodiments of the utility model,
The pin end 21 of the interconnecting piece 2, box end 22 and reinforce the connection type that setting bearing can also be respectively adopted between ontology 11, it is real
Rotary setting between existing pin end 21 and reinforcement ontology 11, between box end 22 and reinforcement ontology 11, herein with no restrictions.
Reinforcing mechanisms 1 are the main bodys of the conduit bearing capacity stiffening device, have the reinforcement ontology substantially in cylinder barrel shaped
11；Upper stopping-off piece 12 is connected on the lower part outer wall for reinforcing ontology 11, and stopping-off piece 12 is substantially in circular ring shape on this, and outer diameter is greater than
The outer diameter of interconnecting piece 2.In the present invention, stopping-off piece 12 along its circumferencial direction is equipped at intervals with multiple upper perforated portions 121 on this,
Perforated portion 121 runs through the upper and lower end faces of upper stopping-off piece 12 on those, and perforated portion 121 can effectively reduce the utility model on those
Conduit bearing capacity stiffening device tripping in resistance.
Further, lower stopping-off piece 3 is socketed in pin end 21, which is located at the lower section of upper stopping-off piece 12, at this
In utility model, which is equipped at intervals with multiple lower perforated portions 31 along its circumferencial direction, under those lower perforated portions 31 run through
The upper and lower end faces of stopping-off piece 3, those lower perforated portions 31 can effectively reduce the conduit bearing capacity stiffening device of the utility model
Tripping in resistance.When reinforcing ontology 11 relative to the rotation of pin end 21, those lower perforated portions 31 can be with about 121 perforated portion on those
Relatively and it is connected to.
Specifically, in the present invention, perforated portion 121 includes being arranged along the radial direction interval of upper stopping-off piece 12 on this
Multiple upper perforation 1211, and those on perforation 1211 along upper stopping-off piece 12 radially outward direction, it is each upper to perforate 1211
Diameter is sequentially increased, to ensure the integral strength of upper stopping-off piece 12.In the present embodiment, between the circumferencial direction of upper stopping-off piece 12
Every setting there are six upper perforated portion 121, each upper perforated portion 121 has along radial direction spaced apart three of upper stopping-off piece 12
Perforation 1211；Certainly, in other embodiments, the circumferencial direction of upper stopping-off piece 12 can be equipped at intervals with four, eight or its
The upper perforated portion 121 of his quantity, and each upper perforated portion 121 can be arranged for interval one, two along the radial direction of upper stopping-off piece 12
Or more upper perforation 1211, herein with no restrictions.
Further, which includes the spaced multiple lower perforation of radial direction along lower stopping-off piece 3
311, and those lower perforation 311, along the radially outward direction of lower stopping-off piece 3, the diameter of each lower perforation 311 is sequentially increased, to protect
Hinder the integral strength of lower stopping-off piece 3.In the present embodiment, six lower perforated portions are equipped at intervals in the circumferencial direction of lower stopping-off piece 3
31, each lower perforated portion 31 has perforates 311 under radial direction spaced apart three of lower stopping-off piece 3；Certainly, in others
In embodiment, it can be equipped at intervals with the lower perforated portion 31 of four, eight or other quantity in the circumferencial direction of lower stopping-off piece 3, and each
Lower perforated portion 31 can perforate 311 under arranged for interval one, two or more along the radial direction of lower stopping-off piece 3, not do herein
Limitation, as long as being worn on the quantity of each lower perforation 311 of the lower perforated portion 31 on lower stopping-off piece 3 and position and upper stopping-off piece 12
The quantity and position consistency of each upper perforation 1211 of hole portion 121.
To guarantee that upper stopping-off piece 12 or lower stopping-off piece 3 have certain shearing strength, in the present invention, it is assumed that used
Upper stopping-off piece 12 or the shearing strength of lower stopping-off piece 3 be M, the diameter of upper 1211 or lower perforation 311 of perforation is d, which holds
The weight of the riser pipe or surface conductor pipe that carry power stiffening device top is the carrying weight of G, riser pipe or surface conductor pipe top
Amount is F, if safety coefficient when upper stopping-off piece 12 or lower stopping-off piece 3 do not occur shear-deformable is k, then upper stopping-off piece 12 or it is lower plus
The calculation formula of the thickness t of strong disk 3 is as follows:
Multiple stiffener plates 13 are arranged along the circumferencial direction interval for reinforcing ontology 11, in the present invention, the reinforcing rib
Plate 13 is the plate of shape in a rectangular trapezoid, is welded to connect on the upper surface and reinforcement ontology 11 of upper stopping-off piece 12, and two
A upper perforated portion 121 is equipped between two adjacent stiffener plates 13, which is mainly used for enhancing upper stopping-off piece 12
With the bonding strength between reinforcement ontology 11；Those stiffener plates 13 are on the upper surface of upper stopping-off piece 12 in uniform intervals point
Cloth.
In a feasible embodiment of the utility model, multiple stiffener plates can be equipped in the lower surface of lower stopping-off piece 3
(not providing attached drawing), the stiffener plate can be the plate of the body of rod or shape in a rectangular trapezoid in long strip, be welded to connect
On the lower surface and pin end 21 of lower stopping-off piece 3, and it is equipped with a lower perforated portion 31 between stiffener plate adjacent two-by-two, should add
Strengthening tendons plate, which is mainly used for increasing, reinforces ontology 11 for the shear action of the lower part soil body, so that the conduit bearing capacity of the utility model
Stiffening device can easier tripping in after combining with conduit string.
In the embodiments of the present invention, the inner wall of the reinforcement ontology 11 is equipped with annular accommodation groove 14.The annular
Accommodation groove 14, which is formed in, to be reinforced between ontology 11 and the pin end 21 of interconnecting piece 2, and the axis of the annular accommodation groove 14 and reinforcement
The axis coaxle of ontology 11 is arranged, which is used to provide space for the operational instrument in tripping in reinforcing mechanisms 1.
Further, it is formed with stage portion 15 on the reinforcement ontology 11 of 14 top of annular accommodation groove, in the stage portion 15
Multiple card slots 151 are equipped at intervals with along the circumferencial direction for reinforcing ontology 11.Those card slots 151 can be connected with annular accommodation groove 14,
It facilitates operational instrument to be caught in, and reinforces ontology 11 will pass through operational instrument rotation.
The course of work of the conduit bearing capacity stiffening device is as follows:
Step S1: by conduit bearing capacity stiffening device with the pin end 21 of interconnecting piece 2 under, box end 22 is in upper sequence
It sits on the female thread for the conduit (that is, riser pipe or surface conductor pipe) being placed on turntable surface, and carries out button operation；
Step S2: the position of the upper stopping-off piece 12 of conduit bearing capacity stiffening device is adjusted, it is ensured that upper stopping-off piece 12
Multiple upper perforated portions 121 and lower stopping-off piece 3 multiple lower about 31 perforated portions it is opposite and be connected to；
Step S3: being cleaned and applied dope to the box end 22 of interconnecting piece 2, lift by crane a new conduit (that is, every
Water conduit or surface conductor pipe) and the pin thread of the conduit is sat up straight to the box end for being placed on the interconnecting piece 2 of conduit bearing capacity stiffening device
In 22, button operation is carried out；
Step S4: the composite structure of tripping in conduit bearing capacity stiffening device and conduit string can continue to connect according to actual needs
New conduit and/or new conduit bearing capacity stiffening device are connect, until conduit driving depth reaches projected depth；
Step S5: from catheter tip to the inside tripping in operational instrument of conduit bearing capacity stiffening device, to upper stopping-off piece 12
Position be adjusted so that multiple lower about 31 perforated portions of the multiple upper perforated portions 121 and lower stopping-off piece 3 of upper stopping-off piece 12
It is staggered, that is, multiple upper perforated portions 121 are not attached to lead to multiple lower about 31 perforated portions.Specifically, in this step,
When operational instrument tripping in is reinforced in the annular accommodation groove 14 of ontology 11, reinforces ontology 11 by above mentioning, be caught in operational instrument
In the multiple card slots 151 for reinforcing ontology 11, ontology 11 is reinforced in rotation under the drive of the operational instrument, thus by upper stopping-off piece 12
Multiple upper 1211 rotations of perforation to multiple lower perforation with lower stopping-off piece 3 about 311 be not attached to logical state.
The conduit bearing capacity stiffening device of the utility model is located at the middle part and/or tail portion of conduit, can multiple same times
Every being connected between conduit, can also independent one be connected between conduit, that is, the conduit bearing capacity stiffening device is repeatable more
Secondary use one or more can also use simultaneously, to increase the bearing capacity of conduit to the full extent, while be not in device
The problem of tripping in difficulty；The utility model can reduce the driving depth of conduit when in use, save activity duration and cost,
Structure is simple, low in cost, is easy to use, and easy to operate, high reliablity.
The foregoing is merely several embodiments of the utility model, and those skilled in the art is according to disclosed in application documents
Content can carry out various changes or modifications without departing from the spirit and scope of the utility model to the utility model embodiment.
Claims (8)
1. a kind of conduit bearing capacity stiffening device characterized by comprising
Reinforcing mechanisms have and reinforce ontology and be connected to the upper stopping-off piece for reinforcing body lower part, along the reinforcement ontology
Circumferencial direction be equipped at intervals with multiple stiffener plates, the multiple stiffener plate is connected with the upper stopping-off piece；Wherein, on described
Stopping-off piece is equipped at intervals with multiple upper perforated portions along its circumferencial direction；
Interconnecting piece has pin end and box end, and the box end is connected to the upper end for reinforcing ontology with being able to rotate, described
Pin end is connected to the lower end for reinforcing ontology with being able to rotate；
Lower stopping-off piece, is socketed on the pin end, and the lower stopping-off piece is located at the lower section of the upper stopping-off piece, the lower reinforcement
Be equipped at intervals with multiple lower perforated portions along its circumferencial direction on disk, the multiple lower perforated portion can with above and below the multiple upper perforated portion
It is oppositely arranged.
2. conduit bearing capacity stiffening device as described in claim 1, which is characterized in that the upper perforated portion includes on described
The spaced multiple upper perforation of the radial direction of stopping-off piece, the lower perforated portion include the radial direction along the lower stopping-off piece
Spaced multiple lower perforation, the multiple lower perforation can be oppositely arranged up and down with the multiple upper perforation.
3. conduit bearing capacity stiffening device as claimed in claim 2, which is characterized in that radially outward along the upper stopping-off piece
Direction, the diameter of the upper perforation is sequentially increased；Along the radially outward direction of the lower stopping-off piece, the lower perforation it is straight
Diameter is sequentially increased.
4. conduit bearing capacity stiffening device as described in claim 1, which is characterized in that the stiffener plate is welded to connect in institute
It states on the upper surface and the box end of stopping-off piece.
5. conduit bearing capacity stiffening device as claimed in claim 4, which is characterized in that the stiffener plate is in a rectangular trapezoid
The plate of shape.
6. conduit bearing capacity stiffening device as described in claim 1, which is characterized in that the inner wall for reinforcing ontology is equipped with
Annular accommodation groove.
7. conduit bearing capacity stiffening device as claimed in claim 6, which is characterized in that the top of the annular accommodation groove is formed
There is stage portion, the stage portion is interior to be equipped at intervals with multiple card slots along the circumferencial direction for reinforcing ontology.
8. conduit bearing capacity stiffening device as described in claim 1, which is characterized in that the threaded upper ends of the pin end connect
In the lower end inside for reinforcing ontology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821958168.3U CN209163740U (en) | 2018-11-26 | 2018-11-26 | Conduit bearing capacity stiffening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821958168.3U CN209163740U (en) | 2018-11-26 | 2018-11-26 | Conduit bearing capacity stiffening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209163740U true CN209163740U (en) | 2019-07-26 |
Family
ID=67340201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821958168.3U Active CN209163740U (en) | 2018-11-26 | 2018-11-26 | Conduit bearing capacity stiffening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209163740U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611035A (en) * | 2018-11-26 | 2019-04-12 | 中国石油大学(北京) | Conduit bearing capacity stiffening device and its application method |
-
2018
- 2018-11-26 CN CN201821958168.3U patent/CN209163740U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611035A (en) * | 2018-11-26 | 2019-04-12 | 中国石油大学(北京) | Conduit bearing capacity stiffening device and its application method |
| CN109611035B (en) * | 2018-11-26 | 2023-11-10 | 中国石油大学(北京) | Catheter bearing capacity reinforcing device and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209163740U (en) | Conduit bearing capacity stiffening device | |
| CN102337895A (en) | Method and device for exploiting sea natural gas hydrate | |
| CN107933828A (en) | A kind of expandable Novel fish mine anchor of anchor head and its installation method | |
| CN207433762U (en) | A kind of offshore oil production drilling platform of stability and high efficiency | |
| CN209129549U (en) | Inner-rotary type conduit bearing capacity stiffening device | |
| CN107503706A (en) | A kind of underwater well workover assembly | |
| Kaiser et al. | Decommissioning cost estimation for deepwater floating structures in the US Gulf of Mexico | |
| CN106368197A (en) | Mat type self-mounted platform with large wellheads | |
| CN205781368U (en) | A kind of curtain corrugated plating vortex-induced vibration suppression device | |
| CN104747090B (en) | Inside spin wing PDC drill bit with interior chip removal function | |
| CN109611035A (en) | Conduit bearing capacity stiffening device and its application method | |
| CN104973225B (en) | A kind of floating production platform | |
| CN109441371A (en) | Inner-rotary type conduit bearing capacity stiffening device and its application method | |
| CN209163777U (en) | A kind of production wellhead combined type production platform | |
| CN201474618U (en) | Multistage alloy leading roller bit | |
| CN108035325A (en) | A kind of Oil sucking device with supporting structure | |
| CN211368838U (en) | Underwater milling groove guiding and positioning device suitable for deepwater embedded foundation | |
| CN206530297U (en) | The well system of double-wellhead semisubmersible drilling platform | |
| CN105908773A (en) | Two-stage socketed pile wind turbine foundation for shallow covering stratum foundation of offshore wind plant and construction method | |
| CN206874232U (en) | A kind of marine drilling waterproof casing bolt-type snap joint | |
| CN205839791U (en) | A kind of novel skirt-type suction anchor | |
| CN215804433U (en) | Directional well windowing appurtenance | |
| CN202969374U (en) | Pile shoe structure for self-elevating platform | |
| CN106892052A (en) | A kind of removable short buoyancy tank attachment structure of lower water workboat | |
| CN108166941A (en) | A kind of TLP bilayers standpipe is drilled well construction operational method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |