Summary of the invention
The object of the present invention is to provide a kind of mechanical multifunctional underwater equipments to install recyclable device, solves existing hydraulic control
Underwater equipment installs recycling tool low-response, by matched influence of water surface hydraulic control system and can not normal operation, and set under water
The problem of standby installation exercise, test jobs and flushing operation need to repeatedly transfer reclaimer operation.
The technical scheme is that a kind of mechanical multifunctional underwater equipment installs recyclable device, including main cylinder, it is main
Cylinder top and drive shaft are socketed, and drive shaft top excircle is provided with annular groove X, drive shaft upper port and the fixed company of working string
It connects;Drive shaft lower port is fixedly connected with flushing pipe nipple;Pressing plate is installed in the annular groove X of drive shaft;
Pressing plate is fixedly connected with actuating sleeve downwards, and actuating sleeve inner cavity is set with main cylinder, and actuating sleeve top is thin neck, driving
Set lower part is particle size, which diametrically symmetrically mills two planes;
Isolation ring is set between drive shaft top excircle and main cylinder top inner periphery, the inner hole of isolation ring is logical
The excircle in hole, isolation ring is multi-diameter shaft, and the top outer of isolation ring is provided with annular groove, and it is recessed that pressing plate lower part is provided with inner via hole
The lower convex shoulder of slot, the inner via hole groove is caught in the annular groove on isolation ring top, and the top convex of pressing plate inner via hole groove
It is caught in the annular groove X of drive shaft;
Upper position is threaded with righting circle in the middle part of main cylinder excircle, and righting circle excircle is provided with the annular groove of abnormity
W sits in annular groove W and is placed with lock pin circle;
Upper position excircle is additionally provided with annular groove Y in the middle part of main cylinder, and lock pin circle upper end outer circumferential set will after being packed into retainer ring
Retainer ring set is attached in the annular groove Y of main cylinder lower section;
Lower annular groove is provided on main cylinder excircle, there are three antirotation keys II for fixed installation in the lower annular groove;Three antirotation keys
It is provided with annular groove on the main cylinder excircle of II top, antirotation keys I are installed, bottom and main cylinder in antirotation keys I on this in annular groove
Between be provided with spring;
Sealing B is provided with below drive shaft lower part outer wall annular groove and main cylinder connection screw thread between inner wall;Isolation ring outer wall
Annular groove and main cylinder upper inside wall are provided with sealing C;It is provided between the annular groove X external wall beneath and isolation ring inner wall of drive shaft close
Seal D;
Drive shaft external wall of upper portion, main cylinder upper inside wall, isolation ring lower end surface, sealing C and sealing D surround unidirectional closed
Space, referred to as A chamber;The unidirectional confined space that drive shaft lower part annular groove and main cylinder sealing surface and sealing B are surrounded, referred to as B chamber;It drives
Between dynamic set particle size inner wall and main cylinder, and the space of installation recyclable device periphery is known as C chamber;Through-hole a is provided in drive shaft,
Through-hole a is connected to A chamber and C chamber;Through-hole b is radially provided on main cylinder, through-hole b is connected to B chamber and C chamber.
Mechanical multifunctional underwater equipment of the invention installs recyclable device, it is further characterized in that:
The flushing pipe nipple is blind hole structure, rinses the flushing hole d that the blind mouth end in pipe nipple lower part is provided with radiation.
The internal channel of the working string is known as channel I, and the axis through-hole of drive shaft is known as channel II, rinses pipe nipple
Axle center blind hole is known as channel III;Channel I, channel II and channel III are connected to the irrigation channel for forming sealing from top to bottom.
The pressing plate is split type structure, and pressing plate inner ring upper and lower end face is respectively arranged with step surface, and in each step
A wear ring is separately installed on face.
It is radially provided with a guiding anti-rotation elongated slot at the thin neck of the actuating sleeve, is equipped with and leads in the guiding anti-rotation elongated slot
To block, guide pad passes through fastener I again and is fixedly connected with main cylinder top excircle.
The lock pin circle is open C shape ring, and edge is connect with lock pin circle upper surface outer using inclined-plane in actuating sleeve lower end surface
Touching.
Sealing A is provided in the inner wall annular groove of the main cylinder lower part;Main cylinder lower part outer wall and sealed support inner wall
Between be provided with sealing E;Sealing F is provided in sealed support external cylindrical surface annular groove.
The pressing plate is split type structure, and actuating sleeve is shaped face revolving body, and righting ring cross-section is Z-type revolving body.
The invention has the advantages that including following aspect:
1) working string being connect by mechanical rotation with main cylinder realizes the failure of water surface hydraulic control system, hydraulic control oil
When pipe hanger installs recycling tool cisco unity malfunction or encounters the bad weathers such as typhoon tsunami, to boll-weevil hanger or hole
The underwater equipments such as protector promptly recycle operation;
2) it by the BOP mechanism for testing of connection sealed support and sealing composition, after hole protector is installed, realizes to adopting under water
The sealing test for the gasket ring that oil tree connects with preventer;In addition, rinsing pipe nipple by connection synchronously completes hole protector
The flushing of recycling and the intrinsic locking annular groove of subsea production tree and sealing surface;
3) connected pipes hanger and tubing string are fulfiled assignment the flushing of well by tubing string channel;
4) compact-sized, operation is reliable, fast without hydraulic-driven, response time, use scope is wide, while having oil pipe suspension
Device recycling, hole protector installation and recycling, BOP gasket ring sealing test, subsea production tree ontology internal channel rinse and operation
The function of well clean-out service reduces the type of subsea production tree system support tool, improve deep water equipment installation, recycling,
The efficiency of the operations such as flushing, reduces operating cost.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
Referring to Fig.1, Fig. 2, Fig. 4, structure of the invention are, including main cylinder 4,4 top of main cylinder by left hand thread with
Drive shaft 1 is socketed, and when main cylinder 4 is in a fixed position, rotates clockwise drive shaft 1, drive shaft 1 is with respect to main cylinder 4 along axial direction
It moves up, rotates counterclockwise drive shaft 1, drive shaft 1 is axially downward with respect to main cylinder 4;The outer spiral shell of 4 lower part of main cylinder
Line can select connection sealed support 8 or thread protecting cap 27 (to be shown in Fig. 1 and connect sealed support 8, in Fig. 4 according to operation needs
Connection thread protecting cap 27 is shown);
1 top excircle of drive shaft is provided with annular groove X, and 1 upper port of drive shaft is solid by self-sealing screw thread and working string 37
Fixed connection;1 lower port of drive shaft, which is screwed to be connected with by self-sealing, rinses pipe nipple 28, and flushing pipe nipple 28 is blind hole structure,
Rinse the flushing hole d that the blind mouth end in 28 lower part of pipe nipple is provided with radiation;The internal channel of working string 37 is known as channel I, drive shaft 1
Axis through-hole be known as channel II, the axle center blind hole for rinsing pipe nipple 28 is known as channel III;Channel I, channel II and channel III are from upper
The irrigation channel of sealing is formed to lower connection;
Pressing plate 2 is installed in the annular groove X of drive shaft 1, pressing plate 2 is split type structure, and 2 inner ring upper and lower end face of pressing plate is set respectively
It is equipped with step surface, and is separately installed with a wear ring 17 on each step surface, wear ring 17 can be in the annular groove X of drive shaft 1
It is inside freely rotated, sees Fig. 2;
Pressing plate 2 passes downwardly through fastener II 13 and is fixedly connected with actuating sleeve 3, and 3 inner cavity of actuating sleeve is set with main cylinder 4, drives
Dynamic set 3 is shaped face revolving body, and actuating sleeve 3 is moved up and down by fastener II 13 and pressing plate 2 with drive shaft 1;Actuating sleeve 3
Top is thin neck, is radially provided with a guiding anti-rotation elongated slot at the thin neck, is equipped with guide pad 11 in the guiding anti-rotation elongated slot,
Guide pad 11 is fixedly connected by fastener I 12 with 4 top excircle of main cylinder again;Actuating sleeve 3, guide pad 11 and fastener I
12 constitute driving devices be oriented to rotation-preventing mechanisms so that actuating sleeve 3 can only radially be moved up and down with actuating sleeve 1 permission away from
From, and do not produce relative rotation with main cylinder 4;3 lower part of actuating sleeve is particle size, which diametrically symmetrically mills two
A plane, clamping face when which is rotate driving set 3;
Isolation ring 15, the inner hole of isolation ring 15 are set between 4 top inner periphery of 1 top excircle of drive shaft and main cylinder
Excircle for through-hole, isolation ring 15 is multi-diameter shaft, and the top outer of isolation ring 15 is provided with annular groove, and 2 lower part of pressing plate is provided with
Inner via hole groove, the lower convex shoulder of the inner via hole groove are caught in 15 upper, annular slot of isolation ring, and 2 inner via hole groove of pressing plate
Top convex is caught in 1 annular groove X of drive shaft, so that isolation ring 15 is moved up and down with pressing plate 2;Drive shaft 1, pressing plate 2, driving
Set 3, main cylinder 4, guide pad 11, fastener I 12 and fastener II 13 are collectively referred to as driving mechanism;
Upper position has been connected through a screw thread righting circle 7 in the middle part of 4 excircle of main cylinder, and 7 section of righting circle is Z-type revolution
Body, righting circle 7 are fastenedly connected with main cylinder 4 by screw thread and are integrated;7 excircle of righting circle is provided with the annular groove W of abnormity, in ring
It is sat in slot W and is placed with lock pin circle 6, lock pin circle 6 is open C shape ring, and when nature opens, it can be closed tighten under external force,
Contact of incline plane is used along with 6 upper surface outer of lock pin circle in 3 lower end surface of actuating sleeve, passes through moving up or downwards for actuating sleeve 3
It is mobile, it unclamps or compressing lock pin circle 6, realization lock pin circle 6 is opened or tightened;The step surface of 6 excircle of lock pin circle is in open configuration
When matched with the annular groove of the locking actuating sleeve cylinder 31 of the underwater equipments such as boll-weevil hanger 33 or hole protector 38, for hanging water
Lower equipment, is shown in Fig. 5;
4 middle part upper position excircle of main cylinder is additionally provided with annular groove Y, after 6 upper end outer circumferential of lock pin circle set is packed into retainer ring 5
5 sets of retainer ring are attached in the annular groove Y of 4 lower section of main cylinder by fastener III 18, retainer ring 5 is split type L tee section revolving body;Lock
Lock ring 6 is free to rotate and radially opens or tightens, and upper end outer circumferential is affixed with 5 inner hole circumference of retainer ring after lock pin circle 6 opens
It closes, lower end excircle and the special-shaped annular groove W of righting circle 7 fit;
Referring to Fig. 3, fastener VI 24 is installed in the perforation threaded hole of 8 upper end of sealed support, when sealed support 8 and main cylinder
After body 4 connects, by tightening fastener parts VI 24, the positional relationship of sealed support 8 and main cylinder 4 is locked;8 top of sealed support
It is provided with lower annular groove on 4 excircle of main cylinder, antirotation keys II 22, Zong Gongsan are fixedly installed with by fastener V 23 in the lower annular groove
A antirotation keys II 22 are distributed along 4 excircle of main cylinder at 180 °;It is provided on 4 excircle of main cylinder of three II 22 tops of antirotation keys
Upper annular groove is equipped with antirotation keys I 21 by fastener IV 19 in annular groove on this, i.e. fastener IV 19 passes through the logical of antirotation keys I 21
Hole is simultaneously threadedly attached on 4 external cylindrical surface of main cylinder;Spring 20 is provided in antirotation keys I 21 between bottom and main cylinder 4, i.e.,
The inner face and the bottom hole apical grafting on 4 excircle of main cylinder of spring 20, the outer end face and I 21 bottom surface apical grafting of antirotation keys of spring 20;
Under natural conditions, spring 20 is in stretched condition, and antirotation keys I 21 are extruded under the action of spring 20, the top surface of antirotation keys I 21
Beyond annular groove external cylindrical surface on main cylinder 4;Antirotation keys I 21 are pressed on main cylinder 4 in annular groove external cylindrical surface when being squeezed;
Sealing A9 is provided in the inner wall annular groove of 4 lower part of main cylinder;1 lower part outer wall annular groove of drive shaft is connect with main cylinder 4
Sealing B10 is provided with below screw thread between inner wall;15 outer wall annular groove of isolation ring and 4 upper inside wall of main cylinder are provided with sealing C14;
Sealing D16 is provided between 15 inner wall of annular groove X external wall beneath and isolation ring of drive shaft 1;4 lower part outer wall of main cylinder and sealing branch
Sealing E25 is provided between 8 inner wall of frame;Sealing F26 is provided in 8 external cylindrical surface annular groove of sealed support.A9 is sealed, B10 is sealed, is close
It seals C14, sealing D16, sealing E25 and sealing F26 and uses single track or multiple-sealed, respectively or all using metal sealing, non-gold
Belong to sealing or combination sealing;Or sealing ring service life is improved by the way of sealing plus wear ring;
What 1 external wall of upper portion of drive shaft, 4 upper inside wall of main cylinder, 15 lower end surface of isolation ring, sealing C14 and sealing D16 were surrounded
Unidirectional confined space, referred to as A chamber;The unidirectional confined air that 1 lower part annular groove of drive shaft and 4 sealing surface of main cylinder and sealing B10 are surrounded
Between, referred to as B chamber;Between 3 particle size inner wall of actuating sleeve and main cylinder 4, and the space of installation recyclable device periphery is known as C chamber;It drives
Through-hole a is provided in moving axis 1, through-hole a is connected to A chamber and C chamber;Through-hole b is radially provided on main cylinder 4, through-hole b is connected to B chamber and C
Chamber.
Connected between drive shaft 1 and working string 37 and between drive shaft 1 and flushing pipe nipple 28 by self-sealing screw thread
Connect or other fit dimensions encryption seal sealed connection form.
Pressing plate 2 is fixedly connected with actuating sleeve 3 by fastener II 13, or using threaded connection, riveting, welding or clip side
Formula connection.
Antirotation keys I 21 are movably attached to 20 upper end of spring by fastener IV 19, or by welding baffle on main cylinder 4
Mode be flexibly connected.
It rinses on pipe nipple 28 and flushing hole d is distributed with, flushing hole d can be blocked or is connected to according to the actual situation, thus
Obtain different flushing hole numbers and directional combination mode.
In the following course of work, the above-mentioned device of the present invention is referred to as installed into recyclable device 36, the installation recyclable device
36 include following four working method in the application.
First way carries out boll-weevil hanger 33 promptly recycling operation and clean-out service referring to Fig. 5.
33 state of boll-weevil hanger: it installed, be locked in subsea production tree main channel.
Preparation: fixed main cylinder 4 rotates clockwise drive shaft 1, actuating sleeve 3 is made to be moved to upper limit position;Lock pin
Circle 6 open and it is free to rotate;It takes down antirotation keys II 22, fastener V 23 and rinses pipe nipple 28;As being connected with below main cylinder 4
Sealed support 8 then takes down sealed support 8 after loosening fasteners VI 24, and installs thread protecting cap 27;1 upper end connection operation of drive shaft
Tubing string 37.
On job platform, installation recyclable device 36 is slowly transferred with working string 37, until 7 lower end circular conical surface of righting circle
Seat is put on 33 loading end of boll-weevil hanger, and lock pin circle 6 is squeezed into 33 locking actuating sleeve cylinder of boll-weevil hanger, 31 upper end annular groove E;
It seals A9 and 33 mandrel outer wall of boll-weevil hanger cooperates, form sealing, channel isolation IV and external annular space C chamber;Channel I, channel
II and channel IV formed sealing irrigation channel;So far installation recyclable device 36 is completed to connect with boll-weevil hanger 33.
It is lifted up installation recyclable device 36 by working string 37, lock pin circle 6 drives the locking of boll-weevil hanger 33 to drive
Moving sleeve 31 moves up, and the retaining ring 32 of boll-weevil hanger 33 separates after retracting with production tree ontology 30, realizes oil pipe suspension
Device 33 and production tree unlock;Continue above to mention working string 37, until boll-weevil hanger 33 is recycled to job platform.
After installation recyclable device 36 is connect with the boll-weevil hanger 33 in production tree, before recycling boll-weevil hanger 33, may be used also
The clean-out service of oil/gas well is carried out by installation recyclable device 36.Steel wire in confirmation boll-weevil hanger 33 is needed before carrying out clean-out service
Blanking plug of restricting all takes out, and Annulus master valve, annulus wing valve and the annulus isolation valve of production tree fully open.
The alternate flushing liquor of high-low pressure is pumped into 37 channel I of working string, flushing liquor flows through channel II, channel IV and oil
It returns after tubing string from shaft bottom along annular space, and makees after flowing through Annulus master valve, annulus wing valve and annulus isolation valve through annular fiowpath return
Industry platform.Annulus master valve, annulus wing valve and the annulus isolation valve that production tree is closed after the completion of rinsing, above mention working string 37, directly
Boll-weevil hanger 33 is extremely recycled to job platform.
Recyclable device 36 is installed to be detached from: on job platform, slow rotate driving axis 1, until antirotation keys I 21 spring into oil pipe
Hanger 33 is promoted in the anti-rotation groove F of sleeve;Drive shaft 1 is rotated counterclockwise, actuating sleeve 3 is made to be moved to lower limit position;Lock pin
Circle 6 retracts, and installation recyclable device 36 and boll-weevil hanger 33 unlock;Working string 37 is above mentioned, installation recyclable device 36 is taken out, until
This completes the urgent recycling of boll-weevil hanger 33.
The second way carries out hole protector 38 and recycles operation referring to Fig. 6.
38 state of hole protector: it installed, be locked in subsea production tree main channel.
Preparation: with mode one.
On job platform, installation recyclable device 36 is slowly transferred with working string 37, until 7 lower end circular conical surface of righting circle
Seat is put on 31 loading end of locking actuating sleeve cylinder of hole protector 38, and lock pin circle 6 squeezes into 38 locking actuating sleeve cylinder 31 of hole protector
In the annular groove G of upper end;So far installation recyclable device 36 is completed to connect with hole protector 38.
It is lifted up installation recyclable device 36 by working string 37, lock pin circle 6 drives the locking driving of hole protector 38
Sleeve 31 moves up, and the retaining ring 32 of hole protector 38 separates after retracting with production tree ontology 30, realize hole protector 38 with
Production tree unlock;Continue above to mention working string 37, until hole protector 38 is recycled to job platform.
Recyclable device 36 is installed to be detached from: with mode one, so far completing the urgent recycling of hole protector 38.
The third mode is shown in Fig. 7, carries out hole protector 38 and recycles operation and rinse production tree ontology 30.
38 state of hole protector: it installed, be locked in subsea production tree main channel.
Preparation: fixed main cylinder 4 rotates clockwise drive shaft 1, actuating sleeve 3 is made to be moved to upper limit position;Lock pin
Circle 6 open and it is free to rotate;Remove antirotation keys II 22 and fastener V 23;After confirmation sealed support 8 is reliably connected, fastener
VI 24 tighten;All flushing hole d for checking that confirmation is rinsed on pipe nipple 28 are unimpeded;1 upper end connection operation tubing string 37 of drive shaft.
Installation recyclable device 36 and hole protector 38 are connected by two the method for mode.It seals F and hole protector 38 is promoted
Sleeve lining f cooperation, forms sealing.
It is pumped into high pressure washing liquid into 37 channel I of working string, flushing liquor flows through behind channel II, channel III from flushing hole d
Outflow is rinsed 30 main channel lower space M chamber of production tree ontology;After rinsing the stipulated time, stop rinsing.
Gently mention installation recyclable device 36 upwards by working string 37, lock pin circle 6 drives the locking driving of hole protector 38
Sleeve 31 moves up, and the retaining ring 32 of hole protector 38 separates after retracting with production tree ontology 30, realize hole protector 38 with
Production tree unlock;While being pumped into high pressure washing liquid into 37 channel I of working string again, working string 37 is slowly above mentioned to rule
Set a distance;37 certain angle of rotation operation tubing string slowly transfers working string 37, continues to rinse;By repeatedly above mention-rotate-
The circulation flushing of decentralization, until 30 main channel internal locking ring of production tree ontology, 32 slot g, sealing surface h, seat put face k and sealing surface m punching
Wash clean is ready to carry out the installation of next step boll-weevil hanger 33;Stop rinsing.
Continue above to mention working string 37, until hole protector 38 is recycled to job platform.
Installation recyclable device 36 is taken out from hole protector 38 by two the method for mode, hole protector 38 is so far completed and returns
It is incorporated as the flushing of industry and production tree ontology 30.
4th kind of mode is shown in Fig. 8, carries out 38 installation exercise of hole protector and 40 sealing test of gasket ring.
Hole protector 38 and oil recovery tree state: hole protector 38 is located on job platform, waits to be installed, i.e. locking actuating sleeve
Cylinder 31 is in upper limit position, and retaining ring 32 retracts;Production tree has been installed on subsea equipment, and has connected above production tree
39 groups of blowout preventer, 39 groups of flashboards of preventer are fully open.
Preparation: fixed main cylinder 4 rotates counterclockwise drive shaft 1, actuating sleeve 3 is made to be moved to lower limit position, lock pin
Circle 6 retracts;It removes and rinses pipe nipple 28;After confirmation sealed support 8 is reliably connected, fastener VI 24 is tightened;The connection of 1 upper end of drive shaft
Working string 37;Confirmation antirotation keys II 22 and fastener V 23 are reliably connected.
On job platform, vertical fixed hole protector 38 slings installation recyclable device 36 right above hole protector 38;
The direction anti-rotation groove H for promoting the antirotation keys II 22 for installing recyclable device 36 with hole protector 38 on sleeve is inconsistent, under slow
Installation recyclable device 36 is put, until device is contacted with hole protector 38;Slowly rotational installation recyclable device 36, makes antirotation keys II 22
It slides into anti-rotation groove H;Continue decentralization installation recyclable device 36, until 7 lower end circular conical surface of righting circle seat is put into hole protector 38
On 31 loading end of locking actuating sleeve cylinder;Drive shaft 1 is rotated clockwise, actuating sleeve 3 is made to be moved to upper limit position, lock pin circle 6 squeezes
Enter in 38 locking actuating sleeve cylinder of hole protector, 31 upper end annular groove G;So far installation recyclable device 36 is completed to connect with hole protector 38.
Hole protector 38 is transferred by working string 37, until hole protector 38 passes through 39 groups of recoils of preventer and is put into oil recovery
It sets in ontology 30 on loading end k;Apply certain thrust to working string 37, makes righting circle 7 that the locking of hole protector 38 be pushed to drive
Moving sleeve 31 finally squeezes retaining ring 32, and hole protector 38 is locked in production tree.
After 38 installation locking of hole protector, 39 groups of pipe rams of preventer are closed, the external cylindrical surface n of working string 37 and anti-
The cooperation of 39 gate sealing surface of spray apparatus, separates the upstream and downstream annular space of 39 flashboard of preventer;At this moment, sealing element E25, sealing element
F26, sealing element p, the channel I of working string 37, installation recycling tool passage II and 38 main channel of hole protector together, are formed
Sealed passage;39 gate panel downstream of preventer, 39 inner wall of preventer and gasket ring 40, production tree main body upper end inner wall, sealing element
E25, sealing element F26, the peripheral seal p of hole protector 38 and sealing q form closed annular space N chamber.
The annular space N formed to preventer 39 and hole protector 38 is intracavitary to be suppressed, and the pressure of N chamber in the measurement stipulated time is passed through
Loss, leakage rate, can test 39 groups of preventer connect with production tree after gasket ring 40 sealing validity.
Pipe ram is opened in the intracavitary pressure release of annular space N;Drive shaft 1 is rotated counterclockwise, actuating sleeve 3 is made to be moved to limit inferior position
It sets;Lock pin circle 6 retracts, and installation recyclable device 36 and hole protector 38 unlock;Working string 37 is above mentioned, installation recyclable device is taken out
36, so far complete the test of 39 gasket ring 40 of installation and preventer of hole protector 38.
Installation recyclable device 36 of the invention is suitable for surface hydraulic control system failure, hydraulic control boll-weevil hanger 33 is pacified
It reinstalls whens putting the tools away bad weathers such as cisco unity malfunction or typhoon etc., mechanically the oil pipe in subsea production tree
The underwater equipments such as hanger 33 or hole protector 38 are promptly recovered to job platform;The device can also be used in the peace of hole protector 38
Dress is sealed test, the flushing operation of production tree ontology 30 and clean-out service as 39 gasket ring 40 of preventer.Only pass through one
Secondary decentralization can be completed at the same time the operations such as installation, flushing or test, and the operating time is greatly saved;Mechanical type rotating working string
37 with regard to the underwater equipments such as achievable boll-weevil hanger 33 or hole protector 38 locking or unlock, easy to operate, reliable performance subtracts
Underwater supporting tool type is lacked, has reduced tool manufacturing cost and deep water installation, recycling, rinses, the operating cost of test, solution
Hydraulic control tool low-response, the reliability of having determined are low, the problems such as being limited by water surface hydraulic control system working condition.