CN202970603U - Liner hanger seal box - Google Patents
Liner hanger seal box Download PDFInfo
- Publication number
- CN202970603U CN202970603U CN 201220679334 CN201220679334U CN202970603U CN 202970603 U CN202970603 U CN 202970603U CN 201220679334 CN201220679334 CN 201220679334 CN 201220679334 U CN201220679334 U CN 201220679334U CN 202970603 U CN202970603 U CN 202970603U
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- seal box
- box body
- fixture block
- inner sleeve
- hanger
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- 239000012530 fluid Substances 0.000 description 32
- 238000005553 drilling Methods 0.000 description 24
- 238000010276 construction Methods 0.000 description 16
- 210000000515 tooth Anatomy 0.000 description 11
- 239000004568 cement Substances 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000012856 packing Methods 0.000 description 6
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Abstract
The utility model discloses a liner hanger seal box, including seal box body, fixture block, support endotheca, take off hand control pin, support the endotheca and set up this internally at seal box, take off hand control pin and pass the seal box body and support the endotheca and be connected, and this internal being provided with of seal box is used for supporting the gliding slip chamber that makes progress of endotheca after taking off hand control pin disconnection, be provided with the fixture block groove that link up seal box body wall on the seal box body, the embedded setting of fixture block is in the fixture block groove, is provided with the boss that is used for the joint on the fixture block outside, supports this internal space that returns to return of fixture block to this internal back that has of endotheca after the endotheca upwards slides. Adopt the utility model discloses, can effectively solve prior art need bore except that the seal box after the well cementation, or can get the sealed technical problem who easily loses efficacy of formula seal box under the abominable condition in the pit.
Description
Technical field
The utility model relates to a kind of extension hanger seal box, belongs to the downhole tool manufacturing technology field of the oil gas well cementing operation operation of natural petroleum gas field.
Background technology
When carrying out drilling liner cementing in the drilling process that carries out the Holes of Complicated Wells such as various deep-wells, ultradeep well, high angle hole, horizontal well and low-pressure absorption well, for guaranteeing that sleeve pipe is lowered into design attitude smoothly, dredge and stable well, often to carry out a large amount of driftings, observation and mud conditioning, need cost a large amount of drilling time and expense, even prepare and take careful setting of casing measure by conscientious well, the tail pipe tubing string card that midway is hampered still can occur sometimes, can not be lowered into design attitude.When carrying out cementing operation, for deep-well and ultradeep well, tubing string convection cell frictional resistance is large, and operational discharge capacity is little, and displacement efficiency is low, and cementing quality is poor; For high angle hole and horizontal well, put in place for guaranteeing that sleeve pipe is lowered to smoothly, drilling fluid is often lower, also causes displacement efficiency low, and cementing quality is poor; Low-pressure absorption well when operational discharge capacity is higher, is easy to press and leaks the stratum, even causes circulation to lose and returns, and carries out smoothly for guaranteeing cementing operation, and operational discharge capacity is also less, also causes displacement efficiency low, and cementing quality is poor.Therefore, when these Holes of Complicated Wells carry out drilling liner cementing, adopt common extension hanger can not satisfy on-the-spot use fully, sometimes also can cause pernicious down-hole accident.
At present, be to solve the produced on-site technical problem, the extension hanger technology has obtained significant progress, has particularly studied to be conducive to the rotary liner hanger that Holes of Complicated Wells tail pipe tubing string was lowered to and improved displacement efficiency and cementing quality the tool meaning of having large improvement.Extension hanger mainly comprises hanger body and running tool, and the hanger body is realized suspension and the suspension control of tail pipe, and running tool is realized sending into and slipping out of the hand of tail pipe tubing string.Be provided with seal box between hanger body and running tool, realize the high pressure sealing of running tool and hanger body, thereby guarantee that the drilling liner cementing notes are for the cement paste construction.
Patent publication No. CN200946473Y discloses a kind of buckling type tail pipe hanger, adopts the top-down mode of hydraulic pressure to expand, can not rotary tail.Patent publication No. CN201024940Y discloses a kind of built-in rotary tailpipe hanging device, and is fashionable under tubing string, the energy rotary tail; When carrying out cementing operation after hanger is sat extension, hanger can not rotate.These two kinds of hangers all can not be realized the rotary tail well cementation.
Patent publication No. CN101173601A and CN101187300A disclose the expansion rotary liner hanger of a kind of hydraulic pressure and mechanical double-acting.Patent publication No. CN101906946A discloses a kind of inflatable rotary liner hanger, adopts hydraulic pressure mode from bottom to top to expand.These two kinds of expansion-type rotary liner hangers when being lowered to and construct, all can be realized the rotation of full tubing string, are conducive to being lowered to and improving cementing quality of tubing string.But these two kinds of expansion-type rotary liner hangers need to just carry out the expanding suspension of extension hanger after drilling liner cementing construction finishes, and the separating of running tool and hanger body.Because well cementation is an excessive risk operation, the drilling liner cementing risk is larger, and after the drilling liner cementing construction finished, cement paste had been injected in well, and superfluous water mud returns to drill pipe section.If running tool can not effectively separate rapidly and trip out with hanger with drilling rod, drilling rod, running tool will be lived by cement together admittedly with hanger, cause serious accident, whole mouthful of well scrapped, lose huge, therefore before common extension hanger carries out cementing operation, effectively separating of extension and running tool and hanger will be sat, and then just the drilling liner cementing cementing practice can be carried out.So this hanger site operation risk is larger.
Patent publication No. CN201826788U discloses a kind of rotary liner hanger of loading ability of bearing, adopts the circular cone crowned roller, high temperature lubricating grease lubrication, and the seal isolation protection reaches the enhancing bearing load carrying capacity, extends the bearing purpose in application life.The patent No. provides the rotary liner hanger of a kind of use with the cylinder roller bearing of hermetically-sealed construction for the patent of US4033640, and repack with grease and lubrication oil are to strengthen supporting capacity.The loading ability of bearing rotary liner hanger of these two kinds of structures, by the single-stage loading ability of bearing, no matter by how the optimizing of structure, the load of rotation carrying tail pipe is all not high enough, can not satisfy on-the-spot long drilling liner cementing rotation construction requirement.
In addition, the seal box of the extension hanger that generally uses in prior art is a circulus, and seal box is inner to be sealed with running tool, and outside and the sealing of hanger body are stuck in the hanger body, adopt the manufacturing of easy brill material.After cementing operation, running tool trips out, seal box is stayed in the hanger body, forms local little internal diameter, for guaranteeing the operation of lower step and construction, need lower boring except seal box, should increase the trip time one time, when boring seal box, due to vibrations, shock, also can destroy the annular space cement sheath, affect the packing performance of cement sheath.
For solving the deficiencies in the prior art, designed the multiple extension hanger structure of seal box that takes out, mainly contain three kinds of forms: packing element formula seal box, bowl-shape rubber seal box and blocking piece type seal box.
Packing element formula seal box is arranged on running tool, and the movable sealing of its outer and hanger body internal diameter trips out with running tool after construction, realizes not boring seal box.This structure is in when construction, sends into the tubing string lower end and is in free state, the constructed impact of the complicated factors such as fluid density, operation pressure, downhole temperature, seal box anchor ring piston of tubing string, cause tubing string length constantly to change, packing element is wriggled back and forth, and seal failure easily occurs the damage packing element.
Bowl-shape rubber seal box also arranges on running tool, and its outer contacts with hanger body internal diameter, can realize the forward high pressure sealing, and oppositely low pressure seal, trip out with running tool after construction, realizes not boring seal box.The reverse sealing load of this structure is low, and is fashionable under tubing string, empties in pipe when more, and the seal box seepage easily occurs, and stabs seal box, the sealing performance during the impact construction.The sealing box is similar to packing element formula seal box characteristics when normal pressure is born in construction, and seal failure also easily occurs.
The blocking piece type seal box is by design specific cards block structure, the sealing box is in the groove of when construction inlay card on hanger body internal diameter, when construction finishes, gone up running tool, end reduced diameter at running tool, fixture block is recoverable, and the groove of seal box and hanger body internal diameter is thrown off realization and tripped out.This structure of using at present, fixture block acts directly on the running tool sealed tube of running tool, and during sealed high pressure, fixture block easily extrudes pit on the running tool sealed tube, affect sealing performance.Slip out of the hand when judgement carrying out hanger, on submit into the instrument height excessively, easily make fixture block reclaim the seal box seal failure of slipping out of the hand, cause and can not construct.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above that existence is closed in existing extension hanger sealing, a kind of extension hanger seal box is provided, adopt the utility model, can effectively solve prior art needs to bore except seal box after well cementation, or the technical problem that the sealing of retrievable seal box was easily lost efficacy under the mal-condition of down-hole.
For achieving the above object, the technical solution adopted in the utility model is as follows:
a kind of extension hanger seal box, it is characterized in that: comprise the seal box body, fixture block, support inner sleeve, the control pin of slipping out of the hand, be set in described support in the seal box body, the control pin of slipping out of the hand passes the seal box body and is connected with the support inner sleeve, and be provided with the sliding cavity that is used for supporting the inner sleeve upward sliding after the control pin of slipping out of the hand disconnects in the seal box body, be provided with the fixture block groove that connects the seal box body wall on described seal box body, described fixture block is embedded to be arranged in the fixture block groove, be provided with the boss for clamping on the fixture block outside, support the space that has in the seal box body after the inner sleeve upward sliding be used to fixture block is bounced back in the seal box body.
Put in described support and be provided with step, the space of described retraction is for supporting the space between inner sleeve upward sliding backward step place and seal box inner body wall.
Be provided with radially spout hole in described sliding cavity.
The lower end of described seal box body is provided with the protection joint, and protection joint and seal box body are threaded connection, and are provided with fixing pin at connection of thread.
Be provided with a plurality of seal grooves on the seal box body outer wall of described radially spout hole top and inwall, be provided with sealing ring in seal groove.
Employing the utility model has the advantage of:
One, in the utility model, adopt and be provided with the fixture block groove that connects the seal box body wall on described seal box body, described fixture block is embedded to be arranged in the fixture block groove, boss on the fixture block outside is connected in the interior grooves of junction of pin and box sub and the first central tube, realizes that seal box is intrinsic fixing at hanger.
Two, in the utility model; be set in described support in the seal box body; put in described support and be provided with step; the space of described retraction is for supporting the space between inner sleeve upward sliding backward step place and seal box inner body wall; avoid fixture block directly to contact with sealed tube; play the frictional force when reducing the running tool sealed tube and sliding in the seal box body; protection running tool sealed tube; thereby the sealing performance of protection running tool sealed tube; and after fixture block retraction, realized that seal box trips out to exempt to bore.
Three, in the utility model, the control pin of slipping out of the hand passes the seal box body and is connected with the support inner sleeve, realizes supporting axial temporary transient the fixing with relative sliding of inner sleeve and controls, thereby realize the reliable fixing of fixture block and whole seal box and slip out of the hand.
Four, in the utility model, be provided with radially spout hole in described sliding cavity, being convenient to support inner sleeve can upward sliding.
Five, in the utility model, be provided with a plurality of seal grooves on the seal box body outer wall above described radially spout hole and inwall, be provided with sealing ring in seal groove, can realize high pressure sealing, seal more reliable.
Seal box in the utility model compared with prior art has seal box and exempts to bore, and prevents that the seal box mistake from slipping out of the hand, and protection running tool sealed tube seals the advantages such as reliable, has solved well the problem of existing seal box technical deficiency.
Description of drawings
Fig. 1 is that the utility model is applied to the structural representation in extension hanger
Fig. 2 is the A-A cross-sectional view in Fig. 1
Fig. 3 is the B-B cross-sectional view in Fig. 1
Fig. 4 is structural representation of the present utility model
Fig. 5 is the A-A cross-sectional view of Fig. 4
Fig. 6 is the structural representation at the releasing gadget place of extension hanger
Fig. 7 is the A-A sectional structure schematic diagram of Fig. 6
Fig. 8 is the C-C sectional structure schematic diagram of Fig. 1
Fig. 9 is the schematic diagram that in extension hanger, the disjunctor bicone is connected with the disjunctor dual-grip
be labeled as in figure: 1, drilling rod, 2, top connection, 3, the moment of torsion cylinder, 4, two male joints, 5, play the pawl fixture block, 6, lower contact, 7, pin and box sub, 8, the first heavy-duty bearing, 9, the first disjunctor bicone, 10, the first disjunctor dual-grip, 11, first sits the extension fluid cylinder, 12, the first central tube, 13, the second heavy-duty bearing, 14, the second disjunctor bicone, 15, the second disjunctor dual-grip, 16, second sits the extension fluid cylinder, 17, the second central tube, 18, hollow rubber plug, 19, the seal box body, 20, fixture block, 21, support inner sleeve, 22, the control pin of slipping out of the hand, 23, sliding cavity, 24, spout hole radially, 25, the protection joint, 26, sealing ring, 27, sealed tube, 28, the second lower contact, 29, the fluid cylinder of giving up, 30, the control pin of giving up, 31, play pawl.
The specific embodiment
Load carrier in extension hanger can be secondary, also can be for more than secondary, and the below is described in further detail application of the present utility model in conjunction with Figure of description as an example of secondary example.
Embodiment 1
As a better embodiment, extension hanger comprises that mainly drilling rod 1(can be short drill pipe herein), top connection 2, moment of torsion cylinder 3, two male joint 4, play pawl fixture block 5, seal box, lower contact 6, pin and box sub 7, releasing gadget, hollow rubber plug 18 and two load carriers.Wherein, seal box and releasing gadget can adopt seal box of the prior art and releasing gadget.
The first load carrier comprises the first heavy-duty bearing 8, the first disjunctor bicone 9, the first disjunctor dual-grip 10, the first seat extension fluid cylinder 11 and the first central tube 12.The second load carrier comprises the second heavy-duty bearing 13, the second disjunctor bicone 14, the second disjunctor dual-grip 15, the second seat extension fluid cylinder 16 and the second central tube 17 and.
described top connection 2 is chimeric by the engaging tooth of splined shaft and moment of torsion cylinder 3 upper ends, moment of torsion cylinder 3 is chimeric by the engaging tooth of splined shaft and pin and box sub 7 upper ends, the support card of described bullet pawl fixture block 5 by lower contact 6 is in the interior grooves of pin and box sub 7, described first sits extension fluid cylinder 11, the first disjunctor dual-grip 10, the first disjunctor bicone 9, the first heavy-duty bearing 8 is arranged on the first central tube 12 successively. and described second sits extension fluid cylinder 16, the second disjunctor dual-grip 15, the second disjunctor bicone 14, the second heavy-duty bearing 13 is arranged on the second central tube 17 successively, described short drill pipe, top connection 2, two male joints 4, lower contact 6 is connected and fixed successively by screw thread, described pin and box sub 7, the first central tube 12 and the second central tube 17 are connected and fixed successively by screw thread, described hollow rubber plug 18 is by pin and the lower end that is threaded in running tool.Described seal box is fixedly mounted on the junction of the outer pin and box sub 7 of sealed tube and the first central tube 12.
In extension hanger, the disjunctor bicone is to be haply end to end formation of pyramidal cylinder by two.The disjunctor dual-grip is by two end to end formation of slips.Disjunctor bicone and disjunctor dual-grip link together by embedded structure.
Such form of structure adopts the first seat to hang fluid cylinder 11 and the second seat extension fluid cylinder 16 is that two groups of separate seats are hung control system, and the extension reliability is sat in raising; Adopt the first disjunctor dual-grip 10 and the second disjunctor dual-grip 15, the protection outer layer sleeve increases hanging capacity; Adopt the first heavy-duty bearing 8 and the second heavy-duty bearing 13 after hanger is sat extension, jointly carry tail pipe weight, the protection bearing guarantees the rotary tail cementing operation, increases hanging capacity; Adopt the engaging tooth of the splined shaft of top connection 2 and moment of torsion cylinder 3 upper ends chimeric, the engaging tooth of the splined shaft of moment of torsion cylinder and pin and box sub 7 upper ends is chimeric, short drill pipe, top connection 2, two male joint 4, lower contact 6 are threaded fixing, pin and box sub 7, the first central tube 12 and the second central tube 17 are threaded, and realize the transmission of rotary tail high pulling torque; Adopt bullet pawl fixture block 5 to realize being connected carrying and slipping out of the hand of running tool and hanger; Adopt hollow rubber plug 18, the cleaning sleeve inside pipe wall, isolated water mud is controlled lower cement plug.
Preferred forms as extension hanger is: mainly comprise drilling rod 1(short drill pipe), top connection 2, moment of torsion cylinder 3, two male joint 4, play pawl fixture block 5, lower contact 6, pin and box sub 7, the first heavy-duty bearing 8, the first disjunctor bicone 9, the first disjunctor dual-grip 10, first and sit and hang fluid cylinder 11, the first central tube 12, the second heavy-duty bearing 13, the second disjunctor bicone 14, the second disjunctor dual-grip 15, second and sit and hang fluid cylinder 16, the second central tube 17 and hollow rubber plug 18.Short drill pipe 1 upper end is provided with the drilling rod box thread, and realization is connected with drilling rod, and the lower end of hanger is provided with the sleeve pipe male thread, and realization is connected with tail pipe.Play the conical surface support card of pawl fixture block 5 by lower contact 6 upper ends in the interior grooves of pin and box sub 7, realize carrying tail pipe.The engaging tooth that splined shaft and the 3 upper ends settings of moment of torsion cylinder are set in top connection 2 is chimeric, the engaging tooth that splined shaft and pin and box sub 7 upper ends settings are set on moment of torsion cylinder 3 is chimeric, short drill pipe 1, top connection 2, two male joint 4, lower contact 6 are threaded fixing, pin and box sub 7, the first central tube 12, the second central tube 17 are threaded fixing, transmitting large torque rotates heavily loaded tail pipe.First sits extension fluid cylinder 11, the first disjunctor dual-grip 10, the first disjunctor bicone 9, the first heavy-duty bearing 8 etc. is arranged on the first central tube 12 successively; second sits extension fluid cylinder 16, the second disjunctor dual-grip 15, the second disjunctor bicone 14, the second heavy-duty bearing 13 etc. is arranged on the second central tube 17 successively; sit for two groups and hang control, slips suspension, heavy-duty bearing carrying; improve to sit and hang reliability; the protection outer layer sleeve; the protection bearing increases supporting capacity, heavily loaded tail pipe rotation well cementation in realization.Hollow rubber plug 18 is realized the cleaning sleeve inside pipe wall by pin and the lower end that is threaded in sealed tube 10, and isolated water mud is controlled cement plug.
The groundwork principle of extension hanger is as follows:
Extension hanger is connected between tail pipe tubing string bunch tube and rod string, is lowered to when being hampered, the well mouth rotary drilling rod is realized the tail pipe rotation, is conducive to tubing string and is lowered into smoothly design attitude.After tubing string is lowered to and puts in place, pitching, build the pressure, first sits and hangs fluid cylinder 11 and promote the first up seats of disjunctor dual-grip 10 and hang, and second sits and hang fluid cylinder 16 and promote the second up seats of disjunctor dual-grip 15 and hang, and realizes that hanger is sat to hang.After sitting extension, tail pipe weight passes to the first disjunctor bicone 9, the first disjunctor dual-grip 10, outer layer sleeve by the first heavy-duty bearing 8 respectively, the second heavy-duty bearing 13 passes to the second disjunctor bicone 14, the second disjunctor dual-grip 15, outer layer sleeve, the first heavy-duty bearing 8 and the common carrying tail pipe of the second heavy-duty bearing 13, outer layer sleeve is by the first disjunctor dual-grip 10 and the second common carrying tail pipe of disjunctor dual-grip 15 weight.
After sitting extension, play pawl fixture block 5 and reclaim, throw off the interior grooves of two female joints 7, realize giving up.Circulate and during cementing practice, running tool is pressed on hanger, the splined shaft of moment of torsion cylinder 3 and pin and box sub 7 upper end engaging tooths are chimeric, and the well mouth rotary drilling rod can realize that tail pipe rotation and rotary tail cement the well, and is conducive to improve displacement efficiency and cementing quality.
As a better embodiment of the present utility model, comprise seal box body 19, fixture block 20 supports inner sleeve 21, slips out of the hand and control pin 22 and protection joint 25.Described fixture block 20 embeds the bottom that is arranged on seal box body 19; support the inside that inner sleeve 21 is arranged on fixture block 20 and seal box body 19; seal box body 19 with support in inner room be provided with to slip out of the hand and control pin 22, protection joint 25 is arranged on seal box body 19 lower ends.The circumferential boss outer rim of described fixture block 20 is stuck in the interior grooves of junction of pin and box sub 7 and the first central tube 12.The sealed tube 27 of described running tool passes the inside of seal box body 19, and running tool sealed tube 27 lower ends are provided with the second lower contact 28.
Such form of structure adopts the mode that supports inner sleeve that arranges between fixture block and running tool sealed tube, reduces the axial activity frictional force of running tool sealed tube, and protection running tool sealed tube strengthens sealing; The control pin of slipping out of the hand is installed in employing between support inner sleeve and seal box body, when avoiding normal handling running tool sealed tube operation, the seal box mistake is slipped out of the hand; During trip-out, carry tonnage in increasing, cut off the control pin of slipping out of the hand, support inner sleeve up, receive in fixture block, seal box trips out with the running tool sealed tube, realizes that seal box exempts to bore.
as preferred forms of the present utility model be: described seal box comprises seal box body 19, fixture block 20, support inner sleeve 21, slip out of the hand and control pin 22, described support inner sleeve 21 is arranged in seal box body 19, the control pin 22 of slipping out of the hand passes seal box body 19 and is connected with support inner sleeve 21, and be provided with the sliding cavities 23 that are used for supporting inner sleeve 21 upward slidings after the control pin 22 of slipping out of the hand disconnects in seal box body 19, be provided with the fixture block groove that connects seal box body 19 walls on described seal box body 19, described fixture block 20 is embedded to be arranged in the fixture block groove, boss on fixture block 20 outsides is connected to the junction of pin and box sub 7 and the first central tube 12, have be used to the space that makes fixture block 20 to seal box body 19 interior retractions in seal box body 19 after support inner sleeve 21 upward slidings.Further, be provided with step on described support inner sleeve 21, the space of described retraction is for supporting the space between inner sleeve 21 upward sliding backward step places and seal box body 19 inwalls.
In addition, be provided with radially spout hole 24 in described sliding cavity 23.The lower end of described seal box body 19 is provided with protection joint 25, and protection joint 25 is threaded connection with seal box body 19, is provided with fixing pin at connection of thread.Be provided with a plurality of seal grooves on the seal box body outer wall of described radially spout hole 24 tops and inwall, be provided with sealing ring 26 in seal groove, sealing ring 26 is preferably O-ring seals.
Further illustrate as follows: described fixture block 20 embeds the bottom that is arranged on seal box body 19; support the inside that inner sleeve 21 is arranged on seal box body 19 and fixture block 20; seal box body 19 with support that being provided with on inner sleeve 21 slips out of the hand and control pin 22, protection joint 25 is arranged on seal box body 19 bottoms.The circumferential boss outer rim of described fixture block 20 is stuck in the interior grooves of junction of pin and box sub 7 and the first central tube 12, realizes that seal box is intrinsic fixing at hanger.Described running tool sealed tube 27 is positioned at seal box body 19 and supports the inside of inner sleeve 21, and the second lower contact 28 is positioned at the bottom of running tool sealed tube 27.Described seal box body 19 and hanger body top and running tool sealed tube place are provided with the O RunddichtringO.
The predominant use of seal box: when circulation and construction, realize the high pressure sealing of hanger body top and running tool sealed tube; Construction finish to pull out of hole, on submit into the instrument sealed tube, drive the second lower contact and upwards promote to support inner sleeve, on put forward load when enough, cut off the control pin of slipping out of the hand, support inner sleeve up, get out of the way fixture block, receive in fixture block, the fixture block outer projection is thrown off the interior grooves of the junction of pin and box sub and the first central tube, and seal box is slipped out of the hand in the hanger body, trips out with the running tool sealed tube, realize that the seal box body trips out in hanger with the running tool sealed tube, realize that seal box exempts to bore.
Embodiment 5
the another embodiment of extension hanger, the described fluid cylinder of giving up is arranged in two male joints, cavity is left on top, described bullet pawl is connected to the bottom of the fluid cylinder of giving up by bindiny mechanism and the control pin of giving up, described bullet pawl lower end is provided with outside bullet pawl claw, play the conical surface support card of pawl claw by the lower contact upper end in the pin and box sub groove, described top connection is chimeric by the engaging tooth of splined shaft and pin and box sub upper end, described disjunctor bicone and disjunctor dual-grip are entrenched togather by embedded structure, described seat is hung fluid cylinder, spigot bearing, the disjunctor bicone, the disjunctor dual-grip, heavy-duty bearings etc. are arranged on central tube successively, described seal box is fixedly mounted on the junction of the outer pin and box sub of sealed tube and central tube, described short drill pipe, top connection, two male joints, lower contact and sealed tube link together, described hollow rubber plug is by pin and be threaded in the sealed tube lower end, described short drill pipe upper end processing drill rod thread, central tube lower end processing casing threads, be connected with bunch tube with rod string respectively, be provided with chute on described disjunctor bicone, be provided with the O RunddichtringO between described seal box and sealed tube and pin and box sub.
Such form of structure adopts the disjunctor dual-grip, and the protection outer layer sleeve increases suspended load; Adopt embedded slips, avoid sitting in advance extension, when avoiding sitting the rear rotation of extension, slips and cone dislocation cause to sit and report the loss effect; The splined shaft of employing top connection and the engaging tooth of pin and box sub are chimeric, realize the tail pipe rotation; Adopt disjunctor bicone and disjunctor dual-grip upper and lower side that heavy-duty bearing is installed respectively, realize that rotary liner hanger is sat extension rear carrying tail pipe and little moment of torsion is realized tail pipe rotation well cementation; Employing give up fluid cylinder, give up and control pin and play pawl, realize that carrying tail pipe weight and hanger give up; Adopt on the disjunctor bicone and be provided with chute, increase area of passage; Adopt seal box, realize the high pressure sealing construction; Adopt hollow rubber plug, the cleaning sleeve inside pipe wall, isolated water mud is controlled lower cement plug.
Embodiment 6
The another embodiment of extension hanger is: described releasing gadget comprises the fluid cylinder 29 of giving up, gives up and control pin 30 and play pawl 31, the fluid cylinder 29 of giving up is arranged in two male joints, bullet pawl 31 is connected on the fluid cylinder 29 of giving up by bindiny mechanism and the control pin 30 of giving up, and plays pawl fixture block 5 and supports and be stuck in the interior groove of pin and box sub 7 by lower contact 6.
The short drill pipe upper end is provided with the drilling rod box thread, and realization is connected with drilling rod, and the lower end of central tube is provided with the sleeve pipe male thread, and realization is connected with tail pipe.The fluid cylinder of giving up is arranged in two male joints, and cavity is left on top, and the cavity that the top of described seat extension fluid cylinder is left is convenient to sit the extension fluid cylinder fully up, realizes slipping out of the hand.Play the bottom that pawl is connected to the fluid cylinder of giving up, the lower end that plays pawl is provided with outside bullet pawl claw, plays the conical surface support card of pawl claw by the lower contact upper end in the pin and box sub interior grooves, realizes carrying tail pipe.Give up and control pin realize giving up fluid cylinder and play the action control of pawl.The engaging tooth that splined shaft and pin and box sub upper end setting are set in top connection is chimeric, and short drill pipe, top connection, two male joint, lower contact are threaded, and pin and box sub is connected with the central tube sleeve pipe, realizes the moment of torsion transmission, rotary tail.Disjunctor dual-grip protection outer layer sleeve increases hanging capacity.The disjunctor dual-grip embeds the disjunctor bicone, avoids sitting in advance extension, makes to sit to hang reliably.Sit the extension fluid cylinder and be arranged on central tube, central tube has flowing hole, realizes sitting hanging and controls.Hollow rubber plug is realized the cleaning sleeve inside pipe wall by pin and the lower end that is threaded in sealed tube, and isolated water mud is controlled cement plug.Disjunctor bicone outer setting had chute, increased area of passage.
The predominant use of extension hanger: be connected between tail pipe tubing string bunch tube and rod string, be lowered to when being hampered, the well mouth rotary drilling rod is realized the tail pipe rotation, is conducive to tubing string and is lowered into smoothly design attitude.After tubing string is lowered to and puts in place, drop into the ball that builds the pressure, build the pressure, promote to sit hang fluid cylinder and the disjunctor dual-grip up, realize that hanger is sat to hang, outer layer sleeve is by disjunctor dual-grip carrying tail pipe weight.After sit hanging, continue to suppress higher pressure, cut off the control pin of giving up, the fluid cylinder band of the giving up pawl of moving is up, realizes giving up.Circulate and during cementing practice, the splined shaft that keeps top connection is chimeric with pin and box sub upper end engaging tooth, realizes the rotary tail well cementation by the well mouth rotary drilling rod, can greatly improve displacement efficiency and raising cementing quality.
Claims (5)
1. extension hanger seal box, it is characterized in that: comprise seal box body (19), fixture block (20), support inner sleeve (21), slip out of the hand and control pin (22), described support inner sleeve (21) is arranged in seal box body (19), the control pin (22) of slipping out of the hand passes seal box body (19) and is connected with support inner sleeve (21), and be provided with the sliding cavity (23) that is used for supporting inner sleeve (21) upward sliding after the control pin (22) of slipping out of the hand disconnects in seal box body (19), be provided with the fixture block groove that connects the seal box body wall on described seal box body (19), described fixture block (20) is embedded to be arranged in the fixture block groove, be provided with the boss for clamping on fixture block (20) outside, have be used to the space that makes fixture block (20) to the interior retraction of seal box body (19) in seal box body (19) after support inner sleeve (21) upward sliding.
2. extension hanger seal box according to claim 1, it is characterized in that: be provided with step on described support inner sleeve (21), the space of described retraction is for supporting the space between inner sleeve (21) upward sliding backward step place and seal box body (19) inwall.
3. extension hanger seal box according to claim 1 and 2, is characterized in that: be provided with radially spout hole (24) in described sliding cavity (23).
4. extension hanger seal box according to claim 3; it is characterized in that: the lower end of described seal box body (19) is provided with protection joint (25); protection joint (25) is threaded connection with seal box body (19), is provided with fixing pin at connection of thread.
5. extension hanger seal box according to claim 3, is characterized in that: be provided with a plurality of seal grooves on seal box body (19) outer wall above described radially spout hole (24) and inwall, be provided with sealing ring (26) in seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220679334 CN202970603U (en) | 2012-12-11 | 2012-12-11 | Liner hanger seal box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220679334 CN202970603U (en) | 2012-12-11 | 2012-12-11 | Liner hanger seal box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202970603U true CN202970603U (en) | 2013-06-05 |
Family
ID=48511690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220679334 Expired - Lifetime CN202970603U (en) | 2012-12-11 | 2012-12-11 | Liner hanger seal box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202970603U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726803A (en) * | 2013-12-20 | 2014-04-16 | 安东石油技术（集团）有限公司 | Oil-gas well tail pipe hanger protecting device |
| CN106869838A (en) * | 2017-03-23 | 2017-06-20 | 中国石油集团西部钻探工程有限公司 | Hydraulic release device |
| CN109488239A (en) * | 2019-01-16 | 2019-03-19 | 上海霞为石油设备技术服务有限公司 | Underwater well head casing hanger and seal assembly one way running tool and method |
| CN112761538A (en) * | 2021-01-15 | 2021-05-07 | 大庆石油管理局有限公司 | Rotary well cementation is with passing torsional joint |
| CN113530483A (en) * | 2021-07-03 | 2021-10-22 | 任丘市华北石油华坤钻采机械有限公司 | Novel liner hanger |
-
2012
- 2012-12-11 CN CN 201220679334 patent/CN202970603U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726803A (en) * | 2013-12-20 | 2014-04-16 | 安东石油技术（集团）有限公司 | Oil-gas well tail pipe hanger protecting device |
| CN103726803B (en) * | 2013-12-20 | 2016-07-20 | 安东石油技术（集团）有限公司 | Oil/gas Well extension hanger preventer |
| CN106869838A (en) * | 2017-03-23 | 2017-06-20 | 中国石油集团西部钻探工程有限公司 | Hydraulic release device |
| CN109488239A (en) * | 2019-01-16 | 2019-03-19 | 上海霞为石油设备技术服务有限公司 | Underwater well head casing hanger and seal assembly one way running tool and method |
| CN112761538A (en) * | 2021-01-15 | 2021-05-07 | 大庆石油管理局有限公司 | Rotary well cementation is with passing torsional joint |
| CN113530483A (en) * | 2021-07-03 | 2021-10-22 | 任丘市华北石油华坤钻采机械有限公司 | Novel liner hanger |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20130605 |