Sea submersible drilling platform for work in shallow water
(57) Abstract:The invention relates to the field of hydraulic structures and is intended for use in shallow water. In the sea submersible drilling platform, comprising a housing in the form of a hull-borne pontoon ballast compartments and pump compartments, on which is mounted rack installed on her upper Playground and equipment, building platform made with simplified ship's contours, while the platform is equipped with waterproof mines descent into ballast tanks and pump rooms, and mine is made in the form of columns, passing from the upper deck of the platform to the deck of the hull in the area of the pumping units. Deck the upper deck and hull in the area of the pumping compartments made with holes for the passage of the columns, equipped with lukovima closing. Columns mines descent into the ballast pump room is cylindrical and shaft Assembly equipped with ladders and transitional sites. Deck the upper deck is equipped with equipment in modular form. The invention increases the ease of use, reliability, and security platforms. 3 C.p. f-crystals, 4 Il. The invention relates to the field hydrotechnology platform for operations in shallow water Jack-up type, containing the pontoon equipment and retractable supporting column (see , for example, the magazine "Ocean Industry" Vol. 24, N 9, 1989, p 32 platform Ocean Master), which disadvantage is their high cost and complexity of the design due to the presence of the lifting mechanism of the support columns.Also known sea submersible drilling platform in shallow water, comprising a housing in the form of a hull-borne pontoon ballast compartments and pump compartments, on which is mounted rack installed on her upper Playground equipment (see "journal of Ocean Industry, Vol. 24, N 9, 1989, S. 101, platform Swamp Master - prototype).The disadvantage of the prototype is the presence of significant towing resistance in the transport position due to the rectangular shape of the pontoon hull-borne, as well as the complexity of maintaining the ballast compartments and pump-rooms due to the lack of safe access to them when submerged pontoon.The technical result of the invention is to improve the reliability and security design, and ease of use.This is achieved in the marine submersible drilling platform for work in shallow water, comprising a housing of hell installed on her upper Playground equipment the fact that the building platform is designed with simplified ship's contours, while the platform is equipped with waterproof mines descent into ballast tanks and pump rooms, and mine is made in the form of columns, passing from the upper deck of the platform to the deck of the hull in the area of the pump-rooms, and deck the upper deck and hull in the area of the pumping compartments made with holes for the passage of the mentioned columns, equipped with lukovima closing.This technical result is also achieved by the fact that the columns of mines descent into ballast tanks and pump rooms is cylindrical.In addition, it is also achieved by the fact that mine get into the ballast tanks and pump rooms are equipped with ladders and transitional sites.While this technical result is also achieved by the fact that the deck of the upper platform fitted with equipment in modular form, namely energy, technology, and service-domestic modules mounted on said deck with the possibility of replacement.In Fig. 1 depicts the inventive marine submersible drilling platform for work in shallow water, side view in the transport position;
The claimed sea submersible drilling platform for work in shallow water includes a housing 1, made in the form of hull-borne pontoon ballast compartments 2 and pump 3 branches. The housing 1 is mounted rack 4 with the upper platform 5.The housing 1 is made with simplified ship lines. The platform is equipped with waterproof mines 6 descent into the ballast compartments 2 and pump compartment 3. When this shaft 6 is made in the form of columns, going from deck 7 upper deck 5 to deck 8 of the housing 1 in the area of the pumping compartments 3. Deck 7 upper deck 5 and deck 8 of the housing 1 is made with holes 9 for the passage of the mentioned columns 6, equipped with lukovima the closure 10. When this column shafts 6 Assembly is cylindrical and provided with ramps 11 and transition areas 12. Deck 7 upper pad 5 provided with a derrick 13 with portal 14 and equipment in modular form, namely: energy 15, 16 technological and service-domestic 17 modules mounted on said deck 7 with the possibility of replacement. Pump compartment 3 are connected with the ballast compartments 2 through the holes 18, closed lid 19.The claimed sea submersible drilling platform is the implementation of its housing 1 with simplified ship lines improves reliability when towing by reducing the towing resistance.For staging platform on the ground in the compartments 2 of the housing 1 is made outboard water through a valve (not shown) of the pumping compartments 3. Execution of mines 6 vanishing waterproof and columns running from deck 7 upper deck 5 to deck 8 of the housing 1 in the area of the pumping compartments allows safe descent team members in the pump compartment 3 at a submerged position of the housing 1. The implementation of the columns 6 cylindrical minimizes the effects of external loads and, consequently, increases the reliability of the platform. The presence of mines 6 slides 11 and transition areas 12 provides ease of operation.Execution equipment, including energy, technology, and utility-bit complexes in modular units 15, 16 and 17, mounted on the deck 7 of the upper platform 5, allows the optimal time to perform the replacement and/or modernization of the mentioned modules and platforms in General. This is especially important in shallow deposits, such as Taz Bay.Thus, the claimed invention provides a significant increase in the reliability and safety of operation sea submersible borborema housing in hull-borne pontoon ballast compartments and pump compartments, on which is mounted rack installed on her upper Playground equipment, characterized in that the building platform is designed with simplified ship's contours, while the platform is equipped with waterproof mines descent into ballast tanks and pump rooms, and mine is made in the form of columns, passing from the upper deck of the platform to the deck of the hull in the area of the pump-rooms, and deck the upper deck and hull in the area of the pumping compartments made with holes for the passage of the mentioned columns, equipped with lukovima closing.2. Sea submersible drilling platform under item 1, characterized in that column mines descent into the ballast pump room is cylindrical.3. Sea submersible drilling platform under item 1, characterized in that the shaft Assembly in the ballast pump rooms are equipped with ladders and transitional sites.4. Sea submersible drilling platform under item 1, characterized in that deck the upper deck is equipped with equipment in modular form, namely: energy, technology, and service-domestic modules mounted on said deck with the possibility of replacement.
FIELD: hydraulic engineering, particularly building bases and foundations, namely bridge piers, in water.
SUBSTANCE: method involves monitoring water obstacle in support building place, including investigating water parameters, recording water level in the course of year, determining floor shape, investigating floor ground, influence of outer disturbing forces and calculating weight and dimensions of support foundation case on the base of above parameters; producing hollow case with several cavities; moving case to installation place; submerging case in water; pacing thereof on floor; fixing case by piles and smoothing floor. Case submerging and placing operations are performed simultaneously with stabilizing vertical case position by performing control and filling of corresponding cavities. Bottom smoothing process is carried out by forcing artificial material, such as concrete layers with crushed stone interlayers, under case bottom. During case placing case is secured by blades built in case bottom and by piles inserted in cavities. Correspondence between case weight, number of blades, head resistance and side friction thereof for particular ground is determined to provide case stability on ground. Upper edge of submerged case is located above maximum possible water wave height. Rock fill is formed around underwater case part.
EFFECT: reduced time of support erection, increased reliability and stability, safety and service life, reduced labor inputs, possibility to erect supports in Arctic basin.
3 cl 1 ex
FIELD: stationary sea oil platforms.
SUBSTANCE: block has underwater support, made in form of two-level bench, formed by vertical beam cases and horizontal links, and also has support columns, connected to support. Horizontal links of bench are made in form of floating tanks, while links, placed along perimeter of lower level of bench, are separated by water-impenetrable walls on sections, provided with ballasting means. Method for mounting support block at the bottom of continental shelf includes transporting, ballasting of floating tanks and fixing support block at the bottom of water body. Support block is transported into wells drilling zone in planned position, sections of floating tanks are ballasted until lower level of support lowers into bottom of water body for 0.3-0.7 of its height, different and slants are evened and holding beams are inserted into cases of support with their following forcing into hard bottom portion and fixing in cases. Ballasting of sections of floating tanks and forcing of holding beams can be performed in pairs in diagonal planes relatively to center of lower level of support.
EFFECT: simplified assemblage, higher reliability.
2 cl, 12 dwg
FIELD: hydraulic engineering, particularly for forming temporary structures for enclosing closed in plane water area bottom part and space above the bottom part through the full water thickness.
SUBSTANCE: method of shallow tunnel construction involves forming structure enclosing closed in plane bottom part; removing water from the structure; performing works in dry structure and demounting above structure. Method of enclosing structure forming involves producing bottomless hydraulic enclosure with controlled floatability; transporting and moving thereof to tunnel path; immersing the enclosure in water up to reaching water area bottom by reducing floatability thereof and fixing enclosure with fastening means and anchor system; leveling upper enclosure part with horizon line and arranging cranage and platforms for building material storage on upper enclosure part; erecting cutoff walls inside space defined by enclosure; removing water from the enclosure; developing bottom ground by trench digging; constructing pile tunnel base; building foundation grill on pile tunnel base; locating composite or precast reinforced concrete tunnel sections on foundation grill; recovering initial floatability of the enclosure. Enclosure structure has movable fastening means formed as blades along vertical walls thereof.
EFFECT: increased tunnel reliability, reduced time of erection thereof.
4 cl, 4 dwg
FIELD: production of ice.
SUBSTANCE: method comprises producing a hollow near the ship's side, delivering air under the ice cover, the air volume does not exceeding the volume of the space defined by ice covering from the top, water from the bottom, and ice walls from the sides over the contour of the future hollow. The walls are frozen from top to bottom by means of direct nonseparable heat exchangers mounted in advance into the covering immediately behind the contour up to the bottom of the future hollow. The delivery stops and the bottom of the future hollow is frozen with the use of L-shaped nonseparable heat exchangers set into the covering simultaneously with the direct heat exchangers. As a result, a closed space is defined, which is stripped, and ice blocks are removed.
EFFECT: enhanced efficiency.
FIELD: hydraulic engineering, particularly underwater structures adapted for oil and gas well operation, preferably on shallow continental shelf having bottom covered with thick silt layer and in ice-covered period.
SUBSTANCE: platform comprises base, vertical pile holders connected with the base and positioning unit for drilling string and well-control equipment fixation. Base is formed as a structure with cavities filled with ballast. The structure is composed of hollow members and functionally divided into two areas. Positioning unit is arranged in the first area, another area including catching opening. Platform is additionally provided with removable mounting frame with production equipment installed on the frame. Arranged in lower frame part are inclined guiding means to provide access into catching opening during mounting frame connection with support platform base in underwater position.
EFFECT: reduced labor inputs for production equipment mounting and maintenance, increased reliability.
FIELD: offshore oil-field hydraulic structures, namely for building fixed platforms.
SUBSTANCE: support substructure comprises three-dimensional latticed structure having prismatic shape and composed of tubular members. The structure has vertical panels with posts, cross-pieces, struts and horizontal diaphragms connected one to another. Horizontal diaphragms have guiding nets for marine risers. The structure is secured to ground by main piles arranged in vertical posts and by foundation having additional piles, which is rigidly connected to tubular members of side edges of above structure. The structure is provided with ice-protection means formed as two truncated prisms of sheet steel and having beveled side ribs rigidly connected one to another by major bases. Marine risers are arranged inside prisms. Each prism of ice-protection means is rigidly connected with tubular members of corresponding diaphragms of three-dimensional latticed structure.
EFFECT: increased resistance to wave, seismic and ice loads, improved manufacturability and, as a result, reduced cost of permanent offshore structure building.
3 cl, 2 dwg
FIELD: offshore oil-field hydraulic structures, namely for building fixed platforms.
SUBSTANCE: method for forming support substructure by welding large blocks involves producing and serially connecting precast members to create flat units, namely panels and diaphragms; connecting flat units by tubular inserts and tubular links to create three-dimensional latticed structure. All operations are divided into four stages in accordance with technological order. The first stage includes forming tubular links and tubular inserts, pile sections and marine riser sections. The second stage includes assemblage of flat panels and diaphragms in horizontal position on corresponding mats. The third and the forth stages include simultaneous installation of flat panels and diaphragms and rigid connection thereof.
EFFECT: reduced labor inputs, time and cost for assembly work performing due to elimination of complicated tubular joints used as assembly units.
3 cl, 7 dwg
FIELD: ground hydraulic structure erection, particularly to decontaminate silt or bottom sediments in water bodies.
SUBSTANCE: method involves building protective dam along perimeter of silt and/or bottom sediment area to be protected; laying waterproofing layer along inner dam perimeter, wherein waterproofing layer height is 2 times as much as silt and/or bottom sediment layer; forming artificial ground massif of watertight ecologically friendly natural ground in water area inside the dam, wherein artificial ground massif thickness is equal to at least three thicknesses of silt and/or bottom sediment layer; forming above-water relief area having 2.5 m height over water surface; forming surface flow discharge system and planting greenery in artificial ground massif.
EFFECT: increased reliability, reduced contamination concentration, prevention of hazardous substances ingress in ambient space and improved ecological safety.
2 cl, 1 dwg
FIELD: marine hydraulic structures, particularly fixed marine oil and gas production platforms.
SUBSTANCE: method for pile installation with the use of handling machine involves driving each pile in conical hole made in guiding means fixedly secured to marine platform base; installing pile and guiding means in coaxial position by guiding device having body installed on guiding members of the base so that the body may be displaced and fixed in predetermined position; lowering pile to working position; installing guiding device above water level on guiding members of platform base in predetermined position, wherein the guiding device is made as cylindrical body part and cylindrical part of guiding member secured one to another and having crossing axes so that cylindrical part of guiding means and cylindrical part of guiding member of guiding device are brought into coaxial state by corresponding linear and angular guiding member displacement; securing guiding device body with guiding members of platform base.
EFFECT: extended technological capabilities and simplified method of pile installation in working position.
5 cl, 4 dwg
FIELD: marine oil production hydraulic structure building, particularly marine platform assemblage.
SUBSTANCE: method involves forming assembly units, namely support unit, load-bearing deck and block units of upper structure, at subassembly site; docking floating vehicle to subassembly site; serially installing assembling units on stockpile carts; moving assembly units from subassembly site to floating vehicle with the use of above stockpile carts; transporting thereof to assemblage site and performing successive mounting thereof with the use of crane-and-mounting ships. The successive mounting operation involves installing support unit on previously prepared ground; installing piles in corresponding bell-shaped guiders of the support unit; driving the piles and cementing thereof to create pile foundation; arranging load-bearing deck on struts and installation guiding bars having different heights and previously formed on support unit, wherein the load-bearing deck has seats for struts and bars receiving and connection thereof is carried out by successive alignment of above bars and seats.
EFFECT: increased efficiency of building equipment and floating vehicle usage; reduced building time, decreased number of operations to be performed at sea, reduced labor inputs and decreased costs of marine fixed platform building.
7 cl, 17 dwg