CN107083768B - Tension leg platform for ocean oil extraction - Google Patents

Tension leg platform for ocean oil extraction Download PDF

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Publication number
CN107083768B
CN107083768B CN201710218970.2A CN201710218970A CN107083768B CN 107083768 B CN107083768 B CN 107083768B CN 201710218970 A CN201710218970 A CN 201710218970A CN 107083768 B CN107083768 B CN 107083768B
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tension leg
platform
sensor
tension
fixing device
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CN107083768A (en
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任海军
戴正康
张丽莉
姜宁
贾彦丽
胡鑫
杨凯
刘宾
张楠
张晓龙
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/06—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for immobilising, e.g. using wedges or clamping rings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Earth Drilling (AREA)
  • Foundations (AREA)

Abstract

The invention discloses a tension leg platform for offshore oil production, which comprises an upright post, a wellhead frame, a middle structure, a right fixing device and a left fixing device, wherein a tension leg is arranged above the upright post, a tension leg fixing base is fixedly arranged at the lower end of the tension leg, a spiral side plate is wound around the tension leg and is connected with the tension leg fixing base, the wellhead frame is fixed on the platform, the upright post is arranged below the platform, a left reinforcing rib is connected to the left side of the upright post, a right reinforcing rib is connected to the right side of the upright post, the right reinforcing rib is fixed on the upright post through the right fixing device, a deck is arranged below the upright post, a production vertical pipe is arranged below the deck, the middle structure is fixed above the production vertical pipe, and heave plates are arranged around the middle structure. This tension leg platform for ocean oil recovery, overall structure is simple, convenient to use, and structural strength and during operation's stability are high, have satisfied the demand of using.

Description

Tension leg platform for ocean oil extraction
Technical Field
The invention relates to the technical field of tension leg platforms, in particular to a tension leg platform for ocean oil production.
Background
Tension leg platforms are equipment in marine oil and gas development projects. The first generation of tension leg platform, namely the traditional type of tension leg platform, has the advantages of long application time, wide distribution range, large number of platforms and mature design theory, and plays an important role in the history of development of the tension leg platform.
However, the existing tension leg platform for offshore oil production in the market has some problems, which always bother customers in use, such as low structural strength, short service life, and low use safety and stability, so that the improvement of the structure of the tension leg platform for offshore oil production in the market is urgently needed to facilitate more convenient service for people.
Disclosure of Invention
The invention aims to provide a tension leg platform for ocean oil production, which aims to solve the problems of low structural strength, short service life, and low use safety and stability in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a tension leg platform for ocean oil production comprises an upright post, a wellhead frame, a middle structure, a right fixing device and a left fixing device, wherein a tension leg is arranged above the upright post, the lower end of the tension leg is fixedly provided with a tension leg fixing base, the periphery of the tension leg is coiled with a spiral side plate, the spiral side plate is connected with the tension leg fixing base, the wellhead frame is fixed on the platform, an upright post is arranged below the platform, the left side of the upright post is connected with a left reinforcing rib, the right side of the upright post is connected with a right reinforcing rib, the left reinforcing rib is fixed on the upright post through a left fixing device, the right reinforcing rib is fixed on the upright post through a right fixing device, a deck is arranged below the upright post, a production vertical pipe is arranged below the deck, the middle structure is fixed above the production vertical pipe, and heave plates are arranged on the periphery of the middle structure;
each tension leg is provided with a deformation sensor and a processor for acquiring detection information of the sensor, wherein the processor is used for respectively acquiring the voltage and the current of each sensor and carrying out operation processing on the current and voltage acquisition signals stored in all the signal processors;
the processor calculates a second sensor pair according to the following formulaCoincidence degree P of value collected by sensor21Judging by adopting current and voltage signals acquired by a sensor;
Figure DEST_PATH_GDA0001307757920000021
in the formula, P21(u1,i1) Representing the degree of coincidence, u, of each set of current and voltage signals1And i1Respectively representing the voltage signal, the current signal, u, collected by the first sensor2And i2Respectively representing a voltage signal and a current signal acquired by the second sensor, wherein T represents mean square error operation, and I' represent integral operation;
the signal coincidence degree P of the second sensor to the first sensor21Calculating according to the following formula;
Figure DEST_PATH_GDA0001307757920000022
wherein M represents the number of sampling groups, j represents the number of sequences, P1j(u1,i1) Representing the degree of coincidence of the signals of the second sensor to the first sensor in each set of signals;
the processor calculates the contact ratio between every two sensors according to the formula, compares every two sensors, obtains a contact ratio threshold value from the processor, compares the calculated contact ratio value of each group with the contact ratio threshold value, and if the contact ratio is greater than the threshold value, one of the tension legs in the group deforms too much; and continuing to compare, and if the same tension leg appears in the groups of comparisons with the contact ratio larger than the threshold value, determining that the tension leg deforms and has a fault and needs to be repaired.
Preferably, the upright posts are arranged at four positions and are respectively positioned at four corners of the deck.
Preferably, the tension leg fixing foundation is in a shape of a Chinese character 'shan', and the tension leg fixing foundation and the tension leg are of an integral structure.
Preferably, the area of the platform is equal to the area of the deck, the four corners of the platform are provided with tension legs, and the platform and the deck are square.
Preferably, the connection mode of the connection part of the right fixing device and the connection mode of the connection part of the left fixing device and the upright post are both fixedly connected.
Compared with the prior art, the invention has the beneficial effects that: this tension leg platform for ocean oil recovery, overall structure is simple, high durability and convenient use, and structural strength and during operation's stability are high, the demand of using has been satisfied, be provided with the structure that right strengthening rib and left strengthening rib combined together in the middle of the stand, the effectual structural strength who improves whole device, make the life of whole device obtain further improvement simultaneously, be equipped with the fixed basis of tension leg, make fixing that tension leg can be more stable under water, the effectual stability and the security that improves whole device when using, the stability of tension leg in water has further been consolidated in setting up of spiral curb plate, and the effectual practicality that improves whole device, the user demand of ocean oil recovery has been satisfied.
Drawings
FIG. 1 is a schematic front view of the structure of the present invention;
FIG. 2 is a schematic top view of the platen of the present invention;
FIG. 3 is an enlarged schematic view of the structure at A of the present invention.
In the figure: 1. the device comprises a vertical column, 2, a production vertical pipe, 3, a spiral side plate, 4, a tension leg, 5, a tension leg fixing foundation, 6, a wellhead frame, 7, a platform, 8, a right reinforcing rib, 9, a deck, 10, a middle structure, 11, a heave plate, 12, a left reinforcing rib, 13, a right fixing device, 14 and a left fixing device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a tension leg platform for offshore oil production comprises a stand column 1, a production riser 2, spiral side plates 3, tension legs 4, a tension leg fixing base 5, a wellhead frame 6, a platform 7, a right reinforcing rib 8, a deck 9, a middle structure 10, a swinging plate 11, a left reinforcing rib 12, a right fixing device 13 and a left fixing device 14, wherein the tension legs 4 are installed above the stand column 1, the lower ends of the tension legs 4 are fixedly provided with the tension leg fixing base 5, the stand column 1 is provided with four positions which are respectively positioned at four corners of the deck 9, so that the support is more stable, a rectangular structure can not deform, the stability of the whole device in working is greatly improved, the spiral side plates 3 are coiled around the tension legs 4, the spiral side plates 3 are connected with the tension leg fixing base 5, the tension leg fixing base 5 is in a shape like a Chinese character 'shan', and the tension leg fixing base 5 and the tension legs 4 are of an integral structure, so that the tension leg 4 can be more stably fixed in the ocean, the service life of the whole device is effectively prolonged, the wellhead frame 6 is fixed on the platform 7, the upright post 1 is installed below the platform 7, the area of the platform 7 is equal to that of the deck 9, the tension leg 4 is arranged at each of four corners of the platform 7, the platform 7 and the deck 9 are square, the whole device is more attractive, the stability is better, the left side of the upright post 1 is connected with the left reinforcing rib 12, the right side of the upright post 1 is connected with the right reinforcing rib 8, the left reinforcing rib 12 is fixed on the upright post 1 through the left fixing device 14, the right reinforcing rib 8 is fixed on the upright post 1 through the right fixing device 13, the connection mode of the right fixing device 13 and the connection of the left fixing device 14 and the upright post 1 is fixed connection, and the use effects of the right reinforcing rib 8 and the left reinforcing rib 12 are effectively improved, and make whole device structural strength higher, the below on the stand 1 is installed deck 9, and production riser 2 is installed to the below of deck 9, and middle part structure 10 is fixed in the top of production riser 2, and middle part structure 10 installs around drooping board 11.
In the present invention, the deformation degree of the tension leg 4 has a great influence on the tension platform, and therefore, the deformation degree of the tension leg 4 needs to be detected; each tension leg 4 is provided with a deformation sensor (not shown in the figure) and a processor for acquiring detection information of the sensor, wherein the processor is used for respectively acquiring the voltage and the current of each sensor and carrying out operation processing on the current and voltage acquisition signals stored in all the signal processors.
The processor calculates the contact ratio P of the second sensor to the value acquired by the first sensor according to the following formula21In this embodiment, the current and voltage signals collected by the sensor are used for determination;
Figure DEST_PATH_GDA0001307757920000051
in the formula, P21(u1,i1) Representing the degree of coincidence, u, of each set of current and voltage signals1And i1Respectively representing the voltage signal, the current signal, u, collected by the first sensor2And i2Respectively representing a voltage signal and a current signal acquired by the second sensor, wherein T represents mean square error operation, and I' represent integral operation;
the signal coincidence degree P of the second sensor to the first sensor21Calculating according to the following formula;
Figure DEST_PATH_GDA0001307757920000061
wherein M represents the number of sampling groups, j represents the number of sequences, P1j(u1,i1) And the signal coincidence degree of the second sensor to the first sensor in each group of signals is represented.
The processor calculates the contact ratio between every two sensors according to the formula, compares every two sensors, obtains a contact ratio threshold value from the processor, compares the calculated contact ratio value of each group with the contact ratio threshold value, and if the contact ratio is greater than the threshold value, one of the tension legs in the group deforms too much; and continuing to compare, and if the same tension leg appears in the groups of comparisons with the contact ratio larger than the threshold value, determining that the tension leg deforms and has a fault and needs to be repaired.
The working principle is as follows: when the tension leg platform for offshore oil production is used, firstly, the structure of the tension leg platform for offshore oil production is simply known, when the tension leg platform is used, the whole device is stably fixed on the ocean by using the tension leg fixing foundation 5 below the tension leg 4, the pretension force acts on the vertical tension leg 4 system of the tension leg 4, the tension leg 4 is in a tensioned state all the time, the movement outside the plane of the platform 7 is smaller and similar to the rigidity due to the larger pretension force of the tension leg 4, the platform 7 and the seabed are fixedly connected together by the tension leg 4, a relatively stable and safe working environment is provided for production, the structure combining the right reinforcing rib 8 and the left reinforcing rib 12 is arranged in the middle of the upright post 1, the structural strength of the whole device is effectively improved, the service life of the whole device is further prolonged, and the spiral side plates 3 are arranged, the stability of tension leg 4 in aqueous has further been strengthened, and the effectual practicality that improves whole device, this is the whole process that the tension leg platform used for the ocean oil recovery used.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a marine tension leg platform for oil recovery, includes stand (1), well head frame (6), middle part structure (10), right fixing device (13) and left fixing device (14), its characterized in that: tension leg (4) is installed to the below of stand (1), and the fixed basis of tension leg (5) is installed to the lower extreme of tension leg (4), spiral curb plate (3) have been coiled all around of tension leg (4), and spiral curb plate (3) are connected with the fixed basis of tension leg (5), well head frame (6) are fixed on platform (7), and the below of platform (7) installs stand (1), the left side of stand (1) is connected with left strengthening rib (12), and the right side of stand (1) is connected with right strengthening rib (8), be fixed in on stand (1) through left fixing device (14) of left strengthening rib (12), right strengthening rib (8) are fixed in on stand (1) through right fixing device (13), deck (9) is installed to the below on stand (1), production riser (2) is installed to the below of deck (9), the middle structure (10) is fixed above the production vertical pipe (2), and the periphery of the middle structure (10) is provided with heave plates (11);
each tension leg (4) is provided with a deformation sensor and a processor for acquiring detection information of the sensor, wherein the processor is used for respectively acquiring the voltage and the current of each sensor and carrying out operation processing on the current and voltage acquisition signals stored in all the signal processors;
the processor calculates the contact ratio P of the second sensor to the value acquired by the first sensor according to the following formula21Judging by adopting current and voltage signals acquired by a sensor;
Figure FDA0002299859070000011
in the formula, P21(u1,i1) Representing the degree of coincidence, u, of each set of current and voltage signals1And i1Respectively representing the voltage signal, the current signal, u, collected by the first sensor2And i2Respectively representing a voltage signal and a current signal acquired by the second sensor, wherein T represents mean square error operation, and I' represent integral operation;
the final value P of the coincidence degree of the signals of the second sensor to the first sensor21(u1,i1) Calculating according to the following formula;
Figure FDA0002299859070000021
wherein M represents the number of sampling groups, j represents the number of sequences, P1j(u1,i1) Representing the degree of coincidence of the signals of the second sensor to the first sensor in each set of signals;
the processor calculates the contact ratio between every two sensors according to the formula, compares every two sensors, obtains a contact ratio threshold value stored in the processor, compares the calculated contact ratio value of each group with the contact ratio threshold value, and if the contact ratio is greater than the threshold value, one of the tension legs in the group deforms too much; and continuing to compare, and if the same tension leg appears in the groups of comparisons with the contact ratio larger than the threshold value, determining that the tension leg deforms and has a fault and needs to be repaired.
2. The tension leg platform for offshore oil production according to claim 1, wherein: the upright posts (1) are arranged at four positions and are respectively positioned at four corners of the deck (9).
3. The tension leg platform for offshore oil production according to claim 1, wherein: the tension leg fixing foundation (5) is in a shape of a Chinese character 'shan', and the tension leg fixing foundation (5) and the tension leg (4) are of an integral structure.
4. The tension leg platform for offshore oil production according to claim 1, wherein: the area of the platform (7) is equal to the area of the deck (9), the four corners of the platform (7) are provided with tension legs (4), and the platform (7) and the deck (9) are square.
5. The tension leg platform for offshore oil production according to claim 1, wherein: the right fixing device (13) and the left fixing device (14) are fixedly connected with the connecting part of the upright post (1).
CN201710218970.2A 2017-04-06 2017-04-06 Tension leg platform for ocean oil extraction Expired - Fee Related CN107083768B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102782218A (en) * 2009-12-11 2012-11-14 大洋洲工程集团有限公司 Multi-purpose ocean platform, and production and installation method thereof
CN204688372U (en) * 2015-06-08 2015-10-07 上海海洋大学 Truss-like oil production platform
EP2963183A1 (en) * 2014-06-30 2016-01-06 Siemens Aktiengesellschaft Offshore support structure, offshore tower installation with the offshore support structure and offshore wind power plant with the offshore tower installation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102782218A (en) * 2009-12-11 2012-11-14 大洋洲工程集团有限公司 Multi-purpose ocean platform, and production and installation method thereof
EP2963183A1 (en) * 2014-06-30 2016-01-06 Siemens Aktiengesellschaft Offshore support structure, offshore tower installation with the offshore support structure and offshore wind power plant with the offshore tower installation
CN204688372U (en) * 2015-06-08 2015-10-07 上海海洋大学 Truss-like oil production platform

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Granted publication date: 20200313

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