A kind of drilling rotary blowout preventer
A kind of drilling rotary blowout preventer is used under balance pressure drilling, belongs under balance pressure drilling well-control equipment technical field.
At present, the balanced drilling technology that China also is to use basically, a spot of preventer that is used under balance pressure drilling mainly contains the single rubber core rotating blowout preventer, abroad, rotating blowout preventer as Xie Fuer company mainly is a single rubber core, and be monolithic, and there is not the packing cooling duct, the shortcoming of prior art is: because it adopts substantially is single rubber core, so, when the single rubber core that is installed in the bottom, the back sealing that is worn in drilling process just is difficult to realize that the bearing of prior art is mainly by annotating butter, so can not be lubricated bearing effectively, cause the damage of bearing easily, do not cool off, so supporting positive cover and V-type packing very easily generate heat and damage at the bottom packing of prior art equipment.
The objective of the invention is to design a kind of two glue core rotating blowout preventers that constitute by last lower glue core, at upper and lower supporting positive cover, all impose the device of forced feed lubrication or cooling in bearing and the V-type packing, can check the sealing situation of upper and lower glue core at any time by peep hole, and it is as a whole to rotate the design of assembly and packing unit, so that dismounting.
The present invention is achieved in that and the present invention includes rotation assembly and housing, lower glue core is fixed on the bottom of central tube, the gluing core is fixed on the top of central tube, outside by clamp connection rotation assembly and housing, when lower glue core need be changed, as long as pull down clip, just can propose lower glue core changes, in the time of need changing the glue core, as long as it is just replaceable to pull down the top adpting flange, can carry out forced feed lubrication to bearing by the through hole that is located in the sliding bearing supporting positive cover of top, by the water injection hole of bottom setting, can be to the V-type packing, the cooling that circulates of supporting positive cover and cooling heat dissipation.
Advantage of the present invention is: because employing is two glue cores, its sealing is more effective, can prolong its application life effectively and guarantee its sealing effectiveness to the forced feed lubrication of bearing with to the water filling cooling of packing, simultaneously, because the replacing of glue core is convenient in the effect of clip of the present invention.
Fig. 1 is an assembling schematic diagram of the present invention.
Fig. 2 is the structural representation of half-twist to the right of Fig. 1 among the present invention.
Provide embodiments of the invention below in conjunction with accompanying drawing: the present invention includes a rotation assembly and a housing, in the rotation assembly, be provided with a central tube 6, the top of central tube 6 is provided with one and goes up adpting flange 1, be fixed on the central tube 6 by bolt and alignment pin 3, be provided with a gluing core 2 on the top of central tube 6, be provided with an oil pressure capsule 5 in the annular space between gluing core 2 and the central tube 6, be provided with a lower glue core on the top of central tube 6 and leak peep hole 4, a sliding bearing supporting positive cover 8 is arranged in the outside of central tube 6, in sliding bearing supporting positive cover 8, be provided with grease channel 10, its outside is provided with lubrication oil injection hole 9 and tap 12, outside, the middle part of central tube 6 is provided with radially cone rolling 13 of an axial ball bearing 11 and, be provided with V-type packing 16 in the bottom of central tube 6, abrasionproof supporting positive cover 17, cold sink 15 and cooling water inlet 18 and outlet opening 25, also be provided with a lower glue core 20 in the bottom of central tube 6, be fixed on the central tube 6 by bolt 19; On housing 26, be provided with an injection hole 28, the bottom of housing 26 and transversely be respectively equipped with the flange 22 and 21 of big latus rectum, on housing 26, also be provided with a V-type packing seepage peep hole 27, clip 23 is arranged on the outside of housing 26, by 4 bolts, 24 fixedly connected rotation assembly and housings 26, when operation, on drilling tool, adorn a leading cone, by upper flange 1, pass gluing core 2 and lower glue core 20, connecting drill bit again is lowered in the well head, connecting well head and this preventer can operate, in drilling process, be worn as lower glue core 20, well liquid will be gone up to the annular space of gluing core 2 and central tube 6, just can see and determine whether changing lower glue core 20 by peep hole 3, wearing and tearing as gluing 2 are not serious, can be by oiling joint 7 to 5 oilings of oil pressure capsule, force gluing core 2 to pack tightly drilling tool and play sealing function, in drilling process, by to 9 oilings of lubrication oil injection hole, make sliding bearing supporting positive cover 8 and axial ball bearing 11 and radially cone rolling 13 be immersed in the lubrication oil, lubrication oil can make the lubricated circulation that realizes by tap 12, by to bottom cooling water injection hole 18 water fillings, make cold sink 15, V-type packing 16 and abrasionproof supporting positive cover 17 obtain cooling, when bottom glue core 20 needs to change, as long as unclamp 4 set bolts 24 on the clip 23, just the rotation assembly can be proposed and plays the replacing of glue 20 together with lower glue core 20, when needing to change gluing core 2, as long as pulling down adpting flange 1 can carry out, by observing the abrasion condition that V-type packing weepage holes 27 can be understood V-type packing 16, the injection hole 28 that is provided with on the housing 26 can carry out special operation or do pressure release and use, last adpting flange 1 can connect preventer, slips, manual slip and other the not kill-job equipment that makes a trip, 26 times adpting flanges 22 of housing can be connected annular preventer with horizontal adpting flange 21, hydraulic operated valve and other equipment, 14 are the sealing ring between rotation assembly and the housing.