CN2352443Y - Double hydraulic cylinder continuous lifting/lowering spud leg having telescopic type spud boot - Google Patents

Abstract

The utility model relates to a double hydraulic cylinder continuous lifting/lowering spud leg having a telescopic type spud boot. The spud leg is processed into an open web, and the inner upper part of the open web is symmetrically and equally provided with oblong inserted pin holes. The outer edge of the lower part of the spud leg is symmetrically provided with sliding grooves, and a sliding frame is sheathed on the sliding grooves of the lower part of the spud leg. Spud boot telescopic wings are symmetrically hinged on the lower part of the sliding frame, and upper and lower hydraulic cylinders are arranged on the same supporting rack in the open web of the spud leg. The spud leg can provide the larger bearing capacity and horizontal sliding resisting force, the spud boot can be completely collected in a platform, and the operating water depth range of the platform is enlarged. The double hydraulic cylinder continuous lifting/lowering spud leg having a telescopic type spud boot has the advantages of simple mechanism and convenient operation and can save 1/3-1/2 of lifting/lowering time and raise the work efficiency.

Description

A kind of dual cylinder continuously ascending spud leg that has the scalability shoe

The utility model belongs to ocean mobile unit spud leg and jacking system.

At present the spud leg of ocean mobile unit is divided into two kinds of case type and truss-likes by version, wherein case type is divided into circle (cross section is for circular) and square (cross section is a rectangle) by its section form, and truss-like can be divided into English truss formula and four jiaos of truss-likes etc. by its cross sectional shape.

Spud leg can be divided into friction bearing pile and shoe bearing pile by its bearing mode, and shoe is not with in friction bearing pile lower end, and the vertical load of flat-bed is mainly born by the friction force of pile lining; The shoe bearing pile can be divided into two kinds of independent shoe formula and settling types again, and the flat-bed vertical load is mainly born by the counter-force of shoe (or heavy pad) bottom surface soil.

The friction bearing pile needs the depth ratio in insertion seabed bigger because of huge friction force will be provided, and pile pulling is very difficult, but anti-horizontal sliding power is big, is used for permanent fixed platform more.

The stake of band shoe (circular or square), because shoe size big (linear dimension is 2-4 times of pile body size), it is superficial that seabed depth is inserted in stake, helps pile pulling like this, but anti-horizontal sliding ability, the shoe that has simultaneously can not be received in the platform body after stake is risen fully, the platform drinking water is increased greatly, influenced the flat-bed operating water depth, the platform that has has been opened the shoe cave more bigger than shoe size, but because the shoe cave is very big, platform structure deals with more complicated.

The stake of the whole heavy pad of band, heavy pad supports area is big, heavy pad can not sink to the seabed, can only be to be sitting on the seabed, and very big vertical bearing capacity can be provided, be applicable to soft soil foundation, but the seabed planeness is required high, macroscopical gradient generally can not be greater than 1.5 °, and heavy pad easily take place to wash in a pan empty, wash away, easily produce horizontal sliding, antiskid moves less stable.

Spud leg jacking system commonly used is divided into two kinds of pinion and-rack and hydraulic actuating cylinder jackings.

Pinion and-rack work is continuous, rising or falling speed is fast, good operation performance, because the precision of gear and tooth bar engagement requirement, the production tolerance of spud leg and gear is very little, and manufacture process requirement is very high, the load distribution more complicated of miniature gears, these factors make the rack-and-gear jacking system cost height 3-5 of hydraulic actuating cylinder jacking type (be doubly), parts ratio be easier to damage.

The hydraulic actuating cylinder jacking type is owing to adopted cooperating of pin and pin-and-hole, manufacture process requirement is low, generally form for every by upper and lower ring beam, eight master cylinders and eight plugging pin oil cylinder and corresponding hydraulic efficiency pressure system, work is discontinuous mostly, rising or falling speed is slow, and has problems such as manufacturing cost is higher, complicated operation.

In order to solve the mode of captiveing joint of stake and shoe, feasible stake can not be given prominence to the shoe bottom, can not provide bigger antiskid to move the problem of ability, the utility model links to each other with shoe stake by sliding tray, make stake after going into mud, increase skid resistance thereby can stretch out the shoe bottom, shoe drops to a lower end under the effect at gravity again when rising simultaneously, and is unlikely to influence the platform drinking water.

Big in order to solve existing shoe planar dimension, perhaps give prominence to externally at platform, influence platform and absorb water; Perhaps the platform body will be opened very big shoe cave so that shoe such as receives in the platform body at problems, the utility model is designed to telescoping with shoe, that is: shoe is stretched out when the seabed is inserted in stake, can increase and contact to earth area 2-3 doubly, to improve load-carrying capacity, and when stake was risen, shoe can be shunk, so that receive in the platform body.

For the complex structure that solves hydraulic actuating cylinder jacking type jacking system and work thereof can not be continuous problem, this dual cylinder continuously ascending device of the present utility model, eight original master cylinders are reduced to two, original dicyclo beam is reduced to two crossbeams, and the plugging pin oil cylinder number also is reduced to originally 1/4, and device of the present utility model has low cost of manufacture, simple operation and other advantages.

The utility model is achieved in that spud leg [1] is processed as on an empty stomach, the equidistant oblong pin hole [4] that has of empty stomach internal upper part symmetry, outer, the bottom symmetry of spud leg [1] has sliding tray [13], sliding frame [11] is enclosed within on the sliding tray [13] of spud leg [1] bottom, and shoe telescopic wing [12] symmetry is hinged on sliding frame [11] bottom; Upper and lower fluid cylinder [5,7] is installed in the empty stomach of spud leg, and is fixed on the same support [6], and the piston rod top of upper and lower fluid cylinder [5,7] is connected with upper and lower crossbeam [2,8].

Figure of description:

Fig. 1: the dual cylinder continuously ascending spud leg scheme drawing that has the scalability shoe

Fig. 2: the dual cylinder continuously ascending spud leg schematic side view that has the scalability shoe

Fig. 3: retractility shoe (rise state) scheme drawing

Fig. 4: spud leg lifting action scheme drawing (pitching pile operating mode)

Fig. 5: spud leg lifting action scheme drawing (pile pulling operating mode) description of drawings:

1, spud leg

2, entablatrance (being with two-way fluid cylinder)

3, entablatrance latch

4, pin hole

5, go up fluid cylinder

6, support

7, following fluid cylinder

8, cross sill (being with two-way fluid cylinder)

9, cross sill latch

10, main platform body

11, sliding frame

12, shoe telescopic wing

13, sliding tray

Now the utility model is further described in conjunction with Figure of description:

Platform is in the towage process, the piston rod of upper and lower fluid cylinder [5,7] is in retracted mode, upper and lower crossbeam latch [3,9] is all in pin hole, the retractility shoe is in the platform body, spud leg after platform is dragged to pre-location of well zone, is removed fixed pile block by a solid mechanism admittedly well, begin to transfer spud leg, entablatrance latch [3] withdrawal; Upper and lower fluid cylinder [5,7] stretches out simultaneously, and a stroke is transferred in stake; Cross sill latch [9] withdrawal, entablatrance latch [3] stretches out simultaneously; Upper and lower fluid cylinder [5,7] is withdrawn simultaneously, and a stroke is transferred in stake again; Cross sill latch [9] stretches out, and entablatrance latch [3] withdrawal simultaneously begins next circulation then.Spud leg is transferred to the end off sea to be suspended when having only several meters and transfers, platform is the location of well and in place under the help of tugboat, rapidly whole spud legs are transferred to synchronously and contacted to earth, continue to transfer spud leg, under spud leg, insert in the process, shoe telescopic wing [12] is subjected to soil resistance force and overturns gradually and open, and until being the level of state, the spud leg area that contacts to earth increases 2--3 doubly, thereby improve vertical bearing capacity 2--3 doubly, sliding frame [11] is gone up relatively along sliding tray [13] and is slided simultaneously, to sliding tray [13] top, and the outstanding shoe of spud leg [1] bottom 2--4 rice, help improving the anti-horizontal sliding ability of stake, after spud leg was inserted to desired depth, with platform leveling, spud leg admittedly well.

Platform fulfils assignment in the time of need leaving well location, at first main platform body [10] is reduced to predetermined buoyant draft, begins the pile pulling action then.Stake is under bearing state, and upper and lower fluid cylinder [5,7] is in retracted mode, and upper and lower crossbeam latch [3,9] is in pin hole [4]; Cross sill latch [9] withdrawal; Upper and lower fluid cylinder [5,7] stretches out simultaneously, will pull out a stroke in the stake; Entablatrance latch [3] withdrawal, cross sill latch [9] stretches out simultaneously; Upper and lower fluid cylinder [5,7] is withdrawn simultaneously, will pull out a stroke in the stake again; Entablatrance latch [3] stretches out, cross sill latch [9] withdrawal simultaneously; Begin next circulation then.In the pile pulling process, spud leg [1] pulls out at first, sliding frame [11] falls relatively along sliding tray [13], until sliding tray [13] lowermost end, sliding frame [11] and shoe telescopic wing [12] begin to be subjected to uplift force, and shoe telescopic wing [12] overturns, extract behind the mud face because the effect of gravity is sagging naturally, the shoe radial dimension reduces, and can receive fully in the platform body, and not influence the flat-bed drinking water.

Scalability shoe of the present utility model compared with prior art can provide bigger bearing capacity, can provide bigger skid resistance again; Make easy for installationly, cost is low; Shoe can all be received in the platform body easily, does not influence the platform drinking water, and platform operating water depth scope is increased; And the plug stake easily.It is simple that dual cylinder continuously ascending device and traditional hydraulic jacking system are compared mechanism, and master cylinder and plugging pin oil cylinder number are 1/4 of conventional hydraulic jack-up system; Cost is low, only is the 1/3--1/2 of conventional hydraulic jack-up system; Oblong pin sky can be realized the insert-pull pin motion in the master cylinder telescopic process, and insert-pull pin is easy, thereby realizes continuous lifting, and the comparable conventional hydraulic jack-up system of lifting time (by equal platform) is saved 1/2--1/3, and work efficiency improves greatly.

Claims (2)

1, a kind of dual cylinder continuously ascending spud leg that has the scalability shoe, it is made up of spud leg, Hydraulic Station, oil cylinder etc., it is characterized in that spud leg [1] is processed as on an empty stomach, spud leg [1] is the equidistant oblong pin hole [4] that has of internal upper part symmetry on an empty stomach, and outer, the bottom symmetry of spud leg [1] has sliding tray [13]; Sliding frame [11] is enclosed within on the sliding tray [13] of spud leg [1] bottom, and shoe telescopic wing [12] symmetry is hinged on sliding frame [11] bottom.

2, a kind of dual cylinder continuously ascending spud leg that has the scalability shoe according to claim 1, it is characterized in that upper and lower fluid cylinder [5,7] is installed in the empty stomach of spud leg [1], and be fixed on the same support [6], the piston rod top of upper and lower fluid cylinder [5,7] is connected with upper and lower crossbeam [2,8].

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