CN104047563A - Pressing-down de-locking packer for hydraulic setting - Google Patents
Pressing-down de-locking packer for hydraulic setting Download PDFInfo
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- CN104047563A CN104047563A CN201410297238.5A CN201410297238A CN104047563A CN 104047563 A CN104047563 A CN 104047563A CN 201410297238 A CN201410297238 A CN 201410297238A CN 104047563 A CN104047563 A CN 104047563A
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Abstract
The invention relates to the technical field of underground packing devices, in particular to a pressing-down de-locking packer for hydraulic setting. The pressing-down de-locking packer for hydraulic setting comprises a spindle, a locking key outer cylinder, a de-locking ratchet, a ratchet spindle, a locking key, a sealing assembly, a lower slip bowl, a slip and a piston assembly. An upper step and a lower step are integrally fixed to the outer wall on the upper portion of the spindle from top to bottom, wherein the outer diameters of the upper step and the lower step are gradually reduced. An annular groove is formed in the lower portion of the lower step. Reverse teeth with upward tooth tips are distributed on the outer wall of the portion, above the annular groove, of the lower step, and an inner protruding ring matched with the outer wall of the lower step is integrally fixed to the inner wall of the upper end of the locking key outer cylinder. The pressing-down de-locking packer for hydraulic setting is reasonable and compact in structure and convenient to use, setting can be completed in a hydraulic mode, a tubular column does not need to be moved, operation is easy, pressure bearing capability is high, safety of an oil and gas well in the exploitation process is ensured, the sealing and setting effects are good, setting is stable, sand burying and debris sedimentation can be effectively prevented, it is ensured that de-locking is carried out smoothly, and reliability and safety of setting and de-locking can be effectively ensured.
Description
Technical field
the present invention relates to downhole packing device technique field, is that a kind of hydraulic setting presses down deblocking packer.
Background technology
packer is extremely important instrument in exploitation of oil-gas field process, can provide effective mechanical means for normal production and the various technological measure of Oil/gas Well.Progress along with petroleum exploration and development, more Oil/gas Well need to improve output by the enforcement of down-hole technological measure, bury dark reservoir because top is covered extruding by huge thick rock, often very fine and close, well stimulation need to be carried out and just stable high yield and stable yields can be obtained.When subterranean strata is carried out to the measures such as acid fracturing, ground cryogen is injected in down-hole string fast, after the fluid temperature reduction being injected into, because the reason tubing string integral body of expanding with heat and contract with cold will shorten, is equivalent on tubing string, to carry.At present, the normal removing seal for packer mode of using has three kinds: the first is permanent, the sealing of hydraulic cylinder extruding rubber parts, and dependable performance, needs milling but remove; The second rotation setting the sealing of pressurization extruding rubber parts, above carries deblocking, can not bear the pulling force that tubing string makes progress, and above carries and gets final product deblocking, causes packer to lose efficacy; The third is the sealing of hydraulic cylinder extruding rubber parts, relies on hydraulic anchor to prevent the unexpected deblocking of upper pulling force, and deblocking relies on pulling force upwards, but hydraulic anchor can make removing seal for packer while losing efficacy, hydraulic anchor, on packing element top, if waterpower anchor fluke can not be regained smoothly, also may cause tubing string to be blocked.These all directly have influence on oil gas well stimulation success rate and development cost.
Summary of the invention
the invention provides a kind of hydraulic setting and press down deblocking packer, overcome the deficiency of above-mentioned prior art, its rubber seal that can effectively solve existing packer needs the undesirable problems of result of use such as milling or unexpected deblocking.
technical scheme of the present invention realizes by following measures: a kind of hydraulic setting presses down deblocking packer, comprises mandrel, locking key urceolus, deblocking ratchet, ratchet mandrel, locking key, seal assembly, lower slips seat, slips and piston assembly, in the external wall of upper portion of mandrel, one is fixed with external diameter reduces successively topping bar and getting out of a predicament or an embarrassing situation from top to bottom, in the bottom of getting out of a predicament or an embarrassing situation, there is annular groove, on the outer wall of getting out of a predicament or an embarrassing situation above annular groove, be distributed with crown pawl upward, on the upper end inwall of locking key urceolus, one is fixed with the internal projecting ring matching with the outer wall of getting out of a predicament or an embarrassing situation, on the locking key urceolus of internal projecting ring below, be distributed with crown pawl upward, on the inwall of deblocking ratchet, be distributed with the crown that matches with the pawl of getting out of a predicament or an embarrassing situation on outer wall pawl down, on the outer wall of deblocking ratchet, be distributed with locking key outer tube inner wall on pawl down of the crown that matches of pawl, deblocking ratchet is arranged in the locking key urceolus of internal projecting ring below and is arranged on getting out of a predicament or an embarrassing situation of annular groove top by pawl by pawl, on locking key outer tube inner wall below deblocking ratchet, fixedly mount the back-up ring that restricted deblocking ratchet moves, the upper installation annular groove and the lower installation annular groove that on the locking key urceolus of back-up ring below, have internal diameter to increase successively, the upper inside wall of ratchet mandrel has and the annular installation groove of getting out of a predicament or an embarrassing situation and matching, in the external wall of upper portion of ratchet mandrel, one is fixed with limited ring dais, the corresponding ratchet mandrel that groove top is installed is fixedly installed togather by deblocking shear pin with the bottom of getting out of a predicament or an embarrassing situation, at the upper end edge even circumferential of ratchet mandrel, be installed with the locking key of at least two, locking key is arc body, the outside portion of locking key is the taper of outer narrow inner width, in locking key, there is opening axial resilient key outwardly that groove is installed, in resilient key is installed groove, resilient key is installed, the upper surface of the upper end of resilient key and upper installation annular groove offsets, the lower end of resilient key is positioned at the inside, upper end of ratchet barrel axle, in the external wall of upper portion of seal assembly, there is sealing that annular groove is installed, seal assembly is sleeved on ratchet mandrel and annular groove is installed in sealing and lower installation annular groove is fixedly installed togather, between upper surface inside the upper surface of lower installation annular groove inner side and seal assembly, form the inner small and outside big taper ring cavity matching with locking key, the lower end of seal assembly is installed with upper slips seat, on the bottom outer wall of upper slips seat, there is annular upper slips seat that groove is installed, the upper surface that upper slips seat is installed groove is tapered slope wide at the top and narrow at the bottom, at upper slips seat, one on groove is installed and is fixed with upper slips seat lug, the frustum that upper slips seat lug is big up and small down, in the external wall of upper portion of lower slips seat, there is annular lower slips seat that groove is installed, the lower surface that lower slips seat is installed groove is up-narrow and down-wide tapered slope, at lower slips, one on groove is installed and is fixed with lower slips seat lug, lower slips seat lug is up-narrow and down-wide frustum, slips is tubular, on slips, there is upper and lower interlaced slot, in the upper inside wall of slips and lower inner wall, there are respectively the upper suspension groove and the lower suspension groove that match with upper slips seat lug and lower slips seat lug, upper slips seat lug and lower slips seat lug lay respectively in suspension groove and lower suspension groove, the upper surface of slips and lower surface are respectively the inclined-plane matching with the tapered slope of upper slips seat installation groove upper surface and the tapered slope of lower slips seat installation groove lower surface, between the bottom of slips and the top of lower slips seat, be installed with slips shear pin, in the external wall of upper portion of slips, be distributed with crown pawl down, on the bottom outer wall of slips, be distributed with crown pawl upward, the lower inner wall of lower slips seat has groove under annular installation, the upper surface that lower groove is installed is up-narrow and down-wide taper surface, the outer wall of lower slips seat and the upper end of piston assembly are fixedly installed togather by setting shear pin, piston assembly comprises piston cylinder, the outer wall of the lower end of lower slips seat and the piston cylinder of piston assembly is fixedly installed togather, between mandrel inside and piston assembly, there is pressure transmission passage, upper slips seat, lower slips seat, slips and piston assembly are set on ratchet mandrel, lower slips seat, between piston cylinder and ratchet mandrel, form annular conical cavity, in the conical cavity of piston cylinder upper end, be set with spring base, in the top of conical cavity, be set with install under the ratchet lock dog that matches of the taper surface of groove, in toroidal cavity between ratchet lock dog and spring base, spring is installed, on the inwall of ratchet lock dog, be distributed with crown pawl down, on the ratchet mandrel above ratchet lock dog, be distributed with crown pawl upward, in the lower inner wall of piston cylinder, one is fixed with in the piston that internal diameter and ratchet outside diameter of mandrel match and encircles platform, in piston, encircle on the ratchet mandrel outer wall above platform and be installed with C type ring, the inwall of piston assembly respectively with the bottom outer wall of mandrel, the bottom outer wall of ratchet mandrel is fixedly installed togather.
the further optimization and/or improvements to foregoing invention technical scheme below:
above-mentioned seal assembly comprises packing element pressed on ring, packing element inner sleeve, upper packing element, middle packing element and lower rubber cylinder, in the external wall of upper portion of packing element pressed on ring, there is sealing that annular groove is installed, packing element upper ring cap is contained on ratchet mandrel and annular groove is installed in sealing and lower installation annular groove is fixedly installed togather, between packing element pressed on ring and ratchet mandrel, form slip toroidal cavity, between upper surface inside the upper surface of lower installation annular groove inner side and packing element pressed on ring, form the inner small and outside big taper ring cavity matching with locking key, on the inwall of the lower end of packing element pressed on ring, one is encircled platform in being fixed with and hanging, on the upper end outer wall of packing element inner sleeve, one is fixed with and hangs outer shroud platform, the external diameter of the internal diameter of packing element inner sleeve and ratchet mandrel matches, hanging outer shroud platform is positioned at the slip toroidal cavity the seat that hang ring platform top and encircles on platform in suspension, the lower end outer wall of packing element inner sleeve and the upper end inwall of upper slips seat are fixedly installed togather, in the packing element of the supreme slip spider of packing element pressed on ring, put and be set with successively packing element from top to bottom, middle packing element and lower rubber cylinder, middle packing element is the annular frustum of inner wide and outer narrow, the inclined-plane that the lower surface of upper packing element matches for the upper surface with middle packing element, the inclined-plane that the upper surface of lower rubber cylinder matches for the lower surface with middle packing element, the lower end of packing element pressed on ring and the upper end of upper packing element offset, the upper end of upper slips seat and the lower end of lower rubber cylinder offset.
on the upper end inwall of above-mentioned packing element inner sleeve, be installed with sealing ring, on the outer wall of suspension outer shroud platform, be installed with sealing ring, between the lower end of packing element inner sleeve and the upper end of upper slips seat, be installed with sealing ring; Or/and annular groove is installed in sealing and lower installation annular groove is fixedly installed togather by screw thread, the lower end outer wall of packing element inner sleeve and the upper end inwall of upper slips seat are fixedly installed togather by screw thread.
above-mentioned piston assembly comprises piston cylinder, piston urceolus, pressure tube and piston lower contact, the outer wall of lower slips seat and piston urceolus are fixedly installed togather by setting shear pin, in the lower inner wall of piston urceolus, one is fixed with in annular installation and encircles platform, in installing, the ring inwall of platform and the bottom outer wall of ratchet mandrel are fixedly installed togather, piston cylinder is positioned at installs the piston urceolus of ring platform top and the toroidal cavity that ratchet mandrel forms, on the outer wall of the bottom of piston cylinder, one is fixed with the piston outer shroud platform that external diameter and piston urceolus internal diameter match, top bar installing hole and the installing hole of getting out of a predicament or an embarrassing situation that in the upper inside wall of piston lower contact, have internal diameter to reduce successively, the lower end of ratchet mandrel is positioned at the installing hole of topping bar, the lower end of mandrel is positioned at the get out of a predicament or an embarrassing situation inwall of installing hole and the installing hole of getting out of a predicament or an embarrassing situation and the bottom outer wall of mandrel and is fixedly installed togather, in installing, in ring platform, there is the axial up-small and down-big hole of topping bar, in the top of piston lower contact, there is up big and down small the get out of a predicament or an embarrassing situation hole corresponding with the hole of topping bar, there is the radial direction through hole communicating with the hole of getting out of a predicament or an embarrassing situation the get out of a predicament or an embarrassing situation lower end in hole of correspondence, the pressure tube that external diameter and top bar hole macropore internal diameter and the hole macropore internal diameter of getting out of a predicament or an embarrassing situation match is installed in the macropore in the macropore in the hole of topping bar and the hole of getting out of a predicament or an embarrassing situation, there is axial passage the inside of pressure tube, outer end at radial direction through hole is installed with plug, the top bar aperture in hole, axial passage, the get out of a predicament or an embarrassing situation aperture in hole, the inner of radial direction through hole is connected and forms pressure transmission passage, the inwall of ring platform in piston, on the outer wall of piston outer shroud platform, be installed with respectively sealing ring, in installing, between ring platform and ratchet mandrel, be installed with sealing ring, the top bar macropore inwall in hole and the macropore inwall in the hole of getting out of a predicament or an embarrassing situation is installed with sealing ring respectively and between the outer wall of pressure tube.
the lower end of above-mentioned ratchet mandrel and top bar and be installed with sealing ring between installing hole inwall, the lower end of mandrel and get out of a predicament or an embarrassing situation and be installed with sealing ring between installing hole inwall; Or/and the ring inwall of platform and the bottom outer wall of ratchet mandrel are fixedly installed togather by screw thread in installing, the bottom outer wall of the inwall of the installing hole of getting out of a predicament or an embarrassing situation and mandrel is fixedly installed togather by screw thread.
between the locking key urceolus of above-mentioned internal projecting ring below and deblocking ratchet, be installed with steady pin; Or/and, on deblocking ratchet and ratchet lock dog, there is respectively upper and lower interlaced slot; Or/and, on the ratchet mandrel of corresponding limited ring dais below installation groove, there is balance pipe.
between the lower end of above-mentioned lower slips seat and the outer wall of piston cylinder, be installed with sealing ring; Or/and the lower end of lower slips seat and the outer wall of piston cylinder are fixedly installed togather by screw thread, there is internal thread the upper end of mandrel, and there is external screw thread the lower end of piston lower contact.
reasonable and compact in structure of the present invention, easy to use, adopt hydraulic way just can complete and set operation, do not need moving tubing string, simple to operate, bear pressure high, guarantee the safety of Oil/gas Well in recovery process, seal and set effective, set stable, can effectively prevent that sand from burying, chip precipitation, guarantee that deblocking carries out smoothly, can effectively guarantee to set reliability, safety with deblocking.
Accompanying drawing explanation
accompanying drawing 1 is looked half section structural representation for the first half master of most preferred embodiment of the present invention.
accompanying drawing 2 is looked half section structural representation for the latter half master of most preferred embodiment of the present invention.
accompanying drawing 3 is looked structure for amplifying schematic diagram for the master of locking key of the present invention.
accompanying drawing 4 is the plan structure schematic diagram of accompanying drawing 3.
accompanying drawing 5 be in accompanying drawing 3 A-A to sectional structure schematic diagram.
coding in accompanying drawing is respectively: 1 is mandrel, 2 for topping bar, 3 for getting out of a predicament or an embarrassing situation, 4 is annular groove, 5 is locking key urceolus, 6 is internal projecting ring, 7 is deblocking ratchet, 8 is back-up ring, 9 is ratchet mandrel, 10 for installing groove, 11 is limited ring dais, 12 is deblocking shear pin, 13 is locking key, 14 is resilient key installation groove, 15 is resilient key, 16 is upper slips seat, 17 is upper slips seat installation groove, 18 is upper slips seat lug, 19 is lower slips seat, 20 is lower slips installation groove, 21 is lower slips seat lug, 22 is slips, 23 is slot, 24 is slips shear pin, 25 for installing lower groove, 26 for setting shear pin, 27 is piston cylinder, 28 is conical cavity, 29 is spring base, 30 is ratchet lock dog, 31 is spring, 32 is ring platform in piston, 33 is C type ring, 34 is packing element pressed on ring, 35 is slip toroidal cavity, 36 is ring platform in hanging, 37 for hanging outer shroud platform, 38 is middle packing element, 39 is lower rubber cylinder, 40 is upper packing element, 41 is packing element inner sleeve, 42 is sealing ring, 43 is ring platform in installing, 44 is piston urceolus, 45 is piston outer shroud platform, 46 is piston lower contact, 47 is the hole of topping bar, 48 is the hole of getting out of a predicament or an embarrassing situation, 49 is radial direction through hole, 50 is pressure tube, 51 is axial passage, 52 is plug, 53 is steady pin, 54 is balance pipe.
The specific embodiment
the present invention is not subject to the restriction of following embodiment, can determine concrete embodiment according to technical scheme of the present invention and actual conditions.
in the present invention, for convenience of description, the description of the relative position relation of each parts is to be all described according to the Butut mode of Figure of description 1, as: the position relationship of upper and lower, left and right etc. is to determine according to the Butut direction of Figure of description.
below in conjunction with embodiment and accompanying drawing, the invention will be further described:
as shown in accompanying drawing 1,2,3,4,5, this hydraulic setting presses down deblocking packer and comprises mandrel 1, locking key urceolus 5, deblocking ratchet 7, ratchet mandrel 9, locking key 13, seal assembly, lower slips seat 19, slips 22 and piston assembly, in the external wall of upper portion of mandrel 1 from top to bottom one be fixed with that external diameter reduces successively top bar 2 and get out of a predicament or an embarrassing situation 3, in 3 the bottom of getting out of a predicament or an embarrassing situation, there is annular groove 4, on 3 outer walls of getting out of a predicament or an embarrassing situation above annular groove 4, be distributed with crown pawl upward, on the upper end inwall of locking key urceolus 5, one is fixed with the internal projecting ring 6 matching with 3 outer walls of getting out of a predicament or an embarrassing situation, on the locking key urceolus 5 of internal projecting ring 6 belows, be distributed with crown pawl upward, on the inwall of deblocking ratchet 7, be distributed with the crown that matches with the pawl of getting out of a predicament or an embarrassing situation on 3 outer walls pawl down, on the outer wall of deblocking ratchet 7, be distributed with locking key urceolus 5 inwalls on pawl down of the crown that matches of pawl, deblocking ratchet 7 is arranged on by pawl in the locking key urceolus 5 of internal projecting ring 6 belows and is arranged on getting out of a predicament or an embarrassing situation on 3 of annular groove 4 tops by pawl, on locking key urceolus 5 inwalls below deblocking ratchet 7, fixedly mount the back-up ring 8 that restricted deblocking ratchet 7 moves, the upper installation annular groove and the lower installation annular groove that on the locking key urceolus 5 of back-up ring 8 belows, have internal diameter to increase successively, the upper inside wall of ratchet mandrel 9 has and the 3 annular installation grooves 10 that match of getting out of a predicament or an embarrassing situation, in the external wall of upper portion of ratchet mandrel 9, one is fixed with limited ring dais 11, the corresponding ratchet mandrel 9 that groove 10 tops are installed is fixedly installed togather by deblocking shear pin 12 with 3 the bottom of getting out of a predicament or an embarrassing situation, at the upper end edge even circumferential of ratchet mandrel 9, be installed with the locking key 13 of at least two, locking key 13 is arc body, the outside portion of locking key 13 is the taper of outer narrow inner width, in locking key 13, there is opening axial resilient key outwardly that groove 14 is installed, in resilient key is installed groove 14, resilient key 15 is installed, the upper surface of the upper end of resilient key 15 and upper installation annular groove offsets, the lower end of resilient key 15 is positioned at the inside, upper end of ratchet barrel axle 9, in the external wall of upper portion of seal assembly, there is sealing that annular groove is installed, seal assembly is sleeved on ratchet mandrel 9 and annular groove is installed in sealing and lower installation annular groove is fixedly installed togather, between upper surface inside the upper surface of lower installation annular groove inner side and seal assembly, form the inner small and outside big taper ring cavity matching with locking key 13, the lower end of seal assembly is installed with upper slips seat 16, on the bottom outer wall of upper slips seat 16, there is annular upper slips seat that groove 17 is installed, the upper surface that upper slips seat is installed groove 17 is tapered slope wide at the top and narrow at the bottom, at upper slips seat, one on groove 17 is installed and is fixed with upper slips seat lug 18, the frustum that upper slips seat lug 18 is big up and small down, in the external wall of upper portion of lower slips seat 19, there is annular lower slips seat that groove 20 is installed, the lower surface that lower slips seat is installed groove 20 is up-narrow and down-wide tapered slope, at lower slips, one on groove 20 is installed and is fixed with lower slips seat lug 21, lower slips seat lug 21 is up-narrow and down-wide frustum, slips 22 is tubular, on slips 22, there is upper and lower interlaced slot 23, in the upper inside wall of slips 22 and lower inner wall, there are respectively the upper suspension groove and the lower suspension groove that match with upper slips seat lug 18 and lower slips seat lug 21, upper slips seat lug 18 and lower slips seat lug 21 lay respectively in suspension groove and lower suspension groove, the upper surface of slips 22 and lower surface are respectively the inclined-plane matching with the tapered slope of upper slips seat installation groove 17 upper surfaces and the tapered slope of lower slips seat installation groove 20 lower surfaces, between the bottom of slips 22 and the top of lower slips seat 19, be installed with slips shear pin 24, in the external wall of upper portion of slips 22, be distributed with crown pawl down, on the bottom outer wall of slips 22, be distributed with crown pawl upward, the lower inner wall of lower slips seat 19 has groove 25 under annular installation, the upper surface that lower groove 25 is installed is up-narrow and down-wide taper surface, the outer wall of lower slips seat 19 and the upper end of piston assembly are fixedly installed togather by setting shear pin 26, piston assembly comprises piston cylinder 27, the outer wall of the lower end of lower slips seat 19 and the piston cylinder of piston assembly 27 is fixedly installed togather, between mandrel 1 inside and piston assembly, there is pressure transmission passage, upper slips seat 16, lower slips seat 19, slips 22 and piston assembly are set on ratchet mandrel 9, lower slips seat 19, between piston cylinder 27 and ratchet mandrel 9, form annular conical cavity 28, in the conical cavity 28 of piston cylinder 27 upper ends, be set with spring base 29, in the top of conical cavity 28, be set with install under the ratchet lock dog 30 that matches of the taper surface of groove 25, in cavity between ratchet lock dog 30 and spring base 29, spring 31 is installed, on the inwall of ratchet lock dog 30, be distributed with crown pawl down, on the ratchet mandrel 9 above ratchet lock dog 30, be distributed with crown pawl upward, in the lower inner wall of piston cylinder 27, one is fixed with in the piston that internal diameter and ratchet mandrel 9 external diameters match and encircles platform 32, in piston, encircle on ratchet mandrel 9 outer walls above platform 32 and be installed with C type ring 33, the inwall of piston assembly respectively with the bottom outer wall of mandrel 1, the bottom outer wall of ratchet mandrel 9 is fixedly installed togather.Ratchet mandrel 9 and deblocking ratchet 7 are all hollow tubular structure with mandrel 1, only because being distributed with pawl on ratchet mandrel 9 and deblocking ratchet 7, are therefore ratchet mandrel 9 and deblocking ratchet 7; Resilient key 15 is existing known technology.
when needs set, first lower end of the present invention is implemented stifled temporarily, mandrel 1 inner chamber is suppressed, the piston cylinder 27 that pressure promotes piston assembly by pressure transmission passage upwards ejects, when pressure is enough large, cut off and set shear pin 26, band flexible spring seat 29, spring 31, lower slips seat 19, slips 22, the upper slips seat 16 crush seal assembly that moves up makes it to expand, when seal assembly expand into peripheral internal surface of sleeve pipe close contact, the lower slips seat 19 moving up is cut off slips shear pin 24, and continue to move up, because the lower surface of upper slips seat 16 and the upper surface of lower slips seat 19 are the inclined-plane matching with slips 22 upper surfaces and lower surface, therefore, cut off after slips shear pin 24, upper slips seat 16 and lower slips seat 19 can slip into smoothly slips 22 inside slips 22 is strutted, slot 23 on slips 22 is more conducive to strutting of slips 22, after slips 22 struts, on the inwall that is snapped to sleeve pipe that pawl on slips 22 outer walls can be more firm, ratchet lock dog 30 is in the process moving upward, pawl on ratchet lock dog 30 inwalls matches with the pawl on ratchet mandrel 9 outer walls, after slips 22 interlocks put in place, pawl on ratchet lock dog 30 now with ratchet mandrel 9 on also mutually interlock of pawl, like this, the setting position of slips 22 is locked, effectively prevent from setting inefficacy, seal assembly before deblocking forever in compressive state, seal assembly is realized the object of upper and lower packing.
when needs carry out deblocking, press down tubing string, be that mandrel 1 moves down, now, ratchet mandrel 9 is by ratchet lock dog 30, upper slips seat 16, lower slips seat 19 and slips 22 are engaged on sleeve pipe, can not move, the relative ratchet mandrel 9 of mandrel 1 moves down, now cut off deblocking shear pin 12, when mandrel 1 moves to locking key 13 and is positioned at annular groove 4, locking key 13 is deviate from radial contraction from taper ring cavity and is entered annular groove 4, seal assembly loses support, on the elastic reaction lower seal assembly of seal assembly, move, seal assembly diameter diminishes, casing annulus seal failure, mandrel 1 continues to move down, after mandrel 1 is displaced downwardly to 3 the lower end of getting out of a predicament or an embarrassing situation and offsets with the upper end that groove 10 is installed, mandrel 1 drives ratchet mandrel 9 together to move down in company with mandrel 1, when the upper surface of encircling platform 32 in mandrel 1 and ratchet mandrel 9 are displaced downwardly to C type ring 33 and piston offsets, under the effect of C type ring 33, mandrel 1 and ratchet mandrel 9 drive piston cylinder 27, lower slips seat 19, slips 22, upper slips seat 16, ratchet lock dog 30 together moves down, slips 22 loses to support and carries out resilience, upper slips seat lug 18 and lower slips seat lug 21 difference returns are in upper suspension groove and lower suspension groove, slips 22 is forced to continue to shrink, move down, realize deblocking.
can according to actual needs, above-mentioned hydraulic setting be pressed down to deblocking packer and make further optimization and/or improvements:
as shown in accompanying drawing 1,2, seal assembly comprises packing element pressed on ring 34, middle packing element 38, lower rubber cylinder 39, upper packing element 40 and packing element inner sleeve 41, in the external wall of upper portion of packing element pressed on ring 34, there is sealing that annular groove is installed, packing element pressed on ring 34 is sleeved on ratchet mandrel 9 and annular groove is installed in sealing and lower installation annular groove is fixedly installed togather, between packing element pressed on ring 34 and ratchet mandrel 9, form slip toroidal cavity 35, between the upper surface of lower installation annular groove inner side and the upper surface of packing element pressed on ring 34 inner sides, form the inner small and outside big taper ring cavity matching with locking key 13, on the inwall of the lower end of packing element pressed on ring 34, one is encircled platform 36 in being fixed with and hanging, on the upper end outer wall of packing element inner sleeve 41, one is fixed with and hangs outer shroud platform 37, the external diameter of the internal diameter of packing element inner sleeve 41 and ratchet mandrel 9 matches, slip toroidal cavity 35 seat that suspension outer shroud platform 37 is positioned at suspension ring platform 36 tops encircle on platform 36 in suspension, the lower end outer wall of packing element inner sleeve 41 and the upper end inwall of upper slips seat 16 are fixedly installed togather, packing element 40 on being set with successively from top to bottom in the packing element inner sleeve 41 of the supreme slip spider 16 of packing element pressed on ring 34, middle packing element 38 and lower rubber cylinder 39, the annular frustum that middle packing element 38 is inner wide and outer narrow, the inclined-plane that the lower surface of upper packing element 40 matches for the upper surface with middle packing element 38, the inclined-plane that the upper surface of lower rubber cylinder 39 matches for the lower surface with middle packing element 38, the upper end of the lower end of packing element pressed on ring 34 and upper packing element 40 offsets, the lower end of the upper end of upper slips seat 16 and lower rubber cylinder 39 offsets.When setting, the piston cylinder 27 of pressure promotion piston assembly upwards ejects to cut off and sets shear pin 26, band flexible spring seat 29, spring 31, lower slips seat 19, slips 22, upper slips seat 16 moves up, because packing element pressed on ring 34 is fixedly installed togather with locking key urceolus 5, therefore packing element pressed on ring 34 can not move, now in packing element inner sleeve 41, move, and then upper slips seat 16 extruding lower rubber cylinders 39, and then packing element 38 and 40 expansions of upper packing element in extruding, because the annular frustum that middle packing element 38 is inner wide and outer narrow, the inclined-plane that the lower surface of upper packing element 40 matches for the upper surface with middle packing element 38, therefore in the process of extruding, can be good at guaranteeing to transmit extruding force, can guarantee packing element 40 again, the situation that in can not occurring in middle packing element 38 and lower rubber cylinder 39 expansion processes, packing element 38 is deviate from, when upper packing element 40, when middle packing element 38 and lower rubber cylinder 40 expand into peripheral internal surface of sleeve pipe close contact, the lower slips seat 19 moving up is cut off slips shear pin 24, upper packing element 40 is identical with the hardness of lower rubber cylinder 39, upper packing element 40 is different from the hardness of middle packing element 38 with lower rubber cylinder 39, therefore crimp is different, upper packing element 40, middle packing element 38 and lower rubber cylinder 39 cooperatively interact and can be good at joint ring empty set pipe, during deblocking, upper packing element 40, middle packing element 38 and lower rubber cylinder 39 lose support, carry out resilience, the seal failure of casing annulus under the elastic reaction of upper packing element 40, middle packing element 38 and lower rubber cylinder 39.
as shown in accompanying drawing 1,2, on the upper end inwall of packing element inner sleeve 41, be installed with sealing ring 42, on the outer wall of suspension outer shroud platform 37, be installed with sealing ring 42, between the lower end of packing element inner sleeve 41 and the upper end of upper slips seat 16, be installed with sealing ring 42; Or/and annular groove is installed in sealing and lower installation annular groove is fixedly installed togather by screw thread, the lower end outer wall of packing element inner sleeve 41 and the upper end inwall of upper slips seat 16 are fixedly installed togather by screw thread.Sealing ring 42 can guarantee good sealing function, is threaded and is easily installed in dismounting.
as shown in accompanying drawing 1,2, piston assembly comprises piston cylinder 27, piston urceolus 44, piston lower contact 46 and pressure tube 50, the outer wall of lower slips seat 19 and piston urceolus 27 are fixedly installed togather by setting shear pin 26, in the lower inner wall of piston urceolus 27, one is fixed with and in annular installation, encircles platform 43, in installing, the ring inwall of platform 43 and the bottom outer wall of ratchet mandrel 9 are fixedly installed togather, piston cylinder 27 is positioned at installs the piston urceolus 44 of ring platform 43 tops and the toroidal cavity of ratchet mandrel 9 formation, on the outer wall of the bottom of piston cylinder 27, one is fixed with the piston outer shroud platform 45 that external diameter and piston urceolus 44 internal diameters match, top bar installing hole and the installing hole of getting out of a predicament or an embarrassing situation that in the upper inside wall of piston lower contact 46, have internal diameter to reduce successively, the lower end of ratchet mandrel 9 is positioned at the installing hole of topping bar, the lower end of mandrel 1 is positioned at the get out of a predicament or an embarrassing situation inwall of installing hole and the installing hole of getting out of a predicament or an embarrassing situation and the bottom outer wall of mandrel 1 and is fixedly installed togather, in installing, in ring platform 43, there is the axial up-small and down-big hole 47 of topping bar, in the top of piston lower contact 46, there is up big and down small the get out of a predicament or an embarrassing situation hole 48 corresponding with the hole 47 of topping bar, there is the radial direction through hole 49 communicating with the hole of getting out of a predicament or an embarrassing situation the get out of a predicament or an embarrassing situation lower end in hole 48 of correspondence, the pressure tube 50 that external diameter and top bar hole 47 macropore internal diameters and the hole 48 macropore internal diameters of getting out of a predicament or an embarrassing situation match is installed in the macropore in the macropore in the hole 47 of topping bar and the hole 48 of getting out of a predicament or an embarrassing situation, there is axial passage 51 inside of pressure tube 50, in the outer end of radial direction through hole 49, be installed with plug 52, the top bar aperture in hole 47, axial passage 51, the get out of a predicament or an embarrassing situation aperture in hole 48, the inner of radial direction through hole 49 is connected and forms pressure transmission passage, the inwall of ring platform 32 in piston, on the outer wall of piston outer shroud platform 45, be installed with respectively sealing ring 42, in installing, between ring platform 43 and ratchet mandrel 9, be installed with sealing ring 42, top bar the macropore inwall in hole 47 and the macropore inwall in the hole 48 of getting out of a predicament or an embarrassing situation respectively and between the outer wall of pressure tube 50, be installed with sealing ring 42.When setting, mandrel 1 inner chamber is suppressed, pressure promotes piston cylinder 27 by pressure transmission passage and upwards ejects, sealing ring 42 in piston on ring platform 32, piston outer shroud platform 45, install in sealing ring between ring platform 43 and ratchet mandrel 9, top bar hole 47 and the sealing ring 42 of getting out of a predicament or an embarrassing situation between hole 48 and pressure tube 50 can play good sealing function, the smooth enforcement moving on assurance piston cylinder 27 in the process of suppressing; Piston cylinder 27 is identical with the action principle of piston rod in common power-equipment; In top bar hole 47 and the hole 48 of getting out of a predicament or an embarrassing situation, also pressure tube 50 can be installed, can be directly using radial direction through hole 49, get out of a predicament or an embarrassing situation hole 48 and the hole 47 of topping bar as pressure transmission passage, but need between the end face that ring platform 43 contacts with piston lower contact 46 in piston urceolus 44, installation, sealing ring be installed like this, guarantee better sealing effectiveness; Radial direction through hole 49 not only participates in having formed pressure transmission passage, and the more convenient processing of through hole that runs through inside and outside being of radial direction through hole 49, after machining, at the outer end of radial direction through hole 49 fixed installation plug 52.
as shown in accompanying drawing 1,2, the lower end of ratchet mandrel 9 and top bar and be installed with sealing ring 42 between installing hole inwall, the lower end of mandrel 1 and get out of a predicament or an embarrassing situation and be installed with sealing ring 42 between installing hole inwall; Or/and the ring inwall of platform 43 and the bottom outer wall of ratchet mandrel 9 are fixedly installed togather by screw thread in installing, the bottom outer wall of the inwall of the installing hole of getting out of a predicament or an embarrassing situation and mandrel 1 is fixedly installed togather by screw thread.Sealing ring 42 can guarantee good sealing function, is threaded and is easily installed in dismounting.
as shown in accompanying drawing 1,2,7 of the locking key urceolus 5 of internal projecting ring 6 belows and deblocking ratchet are installed with steady pin 53; Or/and, on deblocking ratchet 7 and ratchet lock dog 30, there is respectively upper and lower interlaced slot; Or/and, on the ratchet mandrel 9 of corresponding limited ring dais 11 below installation groove 10, there is balance pipe 54.Steady pin 53 can prevent from, between deblocking ratchet 7 and locking key urceolus 5, relative moving radially occurs; Slot on deblocking ratchet 7 can guarantee that with the slot on ratchet lock dog 30 the relative mandrel 1 of deblocking ratchet 7 moves more smoothly in deblocking process, the relative ratchet mandrel 9 of ratchet lock dog 30 moves more smoothly; Balance pipe 54 is convenient in setting process, while moving in packing element inner sleeve 41, guarantees internal and external pressure balance, and then the smooth enforcement of the work of assurance.
as shown in accompanying drawing 1,2, between the lower end of lower slips seat 19 and the outer wall of piston cylinder 27, be installed with sealing ring 42; Or/and the outer wall of the lower end of lower slips seat 19 and piston cylinder 27 is fixedly installed togather by screw thread, there is internal thread the upper end of mandrel 1, and there is external screw thread the lower end of piston lower contact 46.Sealing ring 42 can guarantee good sealing function, is threaded and is easily installed in dismounting.
the present invention adopts hydraulic way just can complete and set operation, do not need moving tubing string, simple to operate, seal assembly adopts 3 packing element combining structures, can bear high pressure, guarantee the safety of Oil/gas Well in recovery process, slips 22 is positioned at seal assembly below, effectively prevent that sand from burying, chip precipitation, smooth while guaranteeing deblocking, and slips 22 adopts monolithic, snap-in force is large, assurance setting position is motionless, enhanced leaktightness effect, simultaneously, even if down-hole string temperature declines, during tubing string contraction in length, mandrel 1 and ratchet mandrel 9 also can together shorten, there is no relative motion, guarantee to set stable, during deblocking, press down tubing string, mandrel 1 and ratchet mandrel 9 have relative motion, deblocking shear pin 12 is sheared, locking key 13 is shunk, seal assembly extends, slips 22 reclaims, so just, depressurization and releasing set smoothly, do not need milling seal, and can effectively guarantee to set the reliability with deblocking.
above technical characterictic has formed most preferred embodiment of the present invention, and it has stronger compliance and best implementation result, can increase and decrease according to actual needs non-essential technical characterictic, meets the demand of different situations.
Claims (10)
1. hydraulic setting presses down a deblocking packer, it is characterized in that comprising mandrel, locking key urceolus, deblocking ratchet, ratchet mandrel, locking key, seal assembly, lower slips seat, slips and piston assembly, in the external wall of upper portion of mandrel, one is fixed with external diameter reduces successively topping bar and getting out of a predicament or an embarrassing situation from top to bottom, in the bottom of getting out of a predicament or an embarrassing situation, there is annular groove, on the outer wall of getting out of a predicament or an embarrassing situation above annular groove, be distributed with crown pawl upward, on the upper end inwall of locking key urceolus, one is fixed with the internal projecting ring matching with the outer wall of getting out of a predicament or an embarrassing situation, on the locking key urceolus of internal projecting ring below, be distributed with crown pawl upward, on the inwall of deblocking ratchet, be distributed with the crown that matches with the pawl of getting out of a predicament or an embarrassing situation on outer wall pawl down, on the outer wall of deblocking ratchet, be distributed with locking key outer tube inner wall on pawl down of the crown that matches of pawl, deblocking ratchet is arranged in the locking key urceolus of internal projecting ring below and is arranged on getting out of a predicament or an embarrassing situation of annular groove top by pawl by pawl, on locking key outer tube inner wall below deblocking ratchet, fixedly mount the back-up ring that restricted deblocking ratchet moves, the upper installation annular groove and the lower installation annular groove that on the locking key urceolus of back-up ring below, have internal diameter to increase successively, the upper inside wall of ratchet mandrel has and the annular installation groove of getting out of a predicament or an embarrassing situation and matching, in the external wall of upper portion of ratchet mandrel, one is fixed with limited ring dais, the corresponding ratchet mandrel that groove top is installed is fixedly installed togather by deblocking shear pin with the bottom of getting out of a predicament or an embarrassing situation, at the upper end edge even circumferential of ratchet mandrel, be installed with the locking key of at least two, locking key is arc body, the outside portion of locking key is the taper of outer narrow inner width, in locking key, there is opening axial resilient key outwardly that groove is installed, in resilient key is installed groove, resilient key is installed, the upper surface of the upper end of resilient key and upper installation annular groove offsets, the lower end of resilient key is positioned at the inside, upper end of ratchet barrel axle, in the external wall of upper portion of seal assembly, there is sealing that annular groove is installed, seal assembly is sleeved on ratchet mandrel and annular groove is installed in sealing and lower installation annular groove is fixedly installed togather, between upper surface inside the upper surface of lower installation annular groove inner side and seal assembly, form the inner small and outside big taper ring cavity matching with locking key, the lower end of seal assembly is installed with upper slips seat, on the bottom outer wall of upper slips seat, there is annular upper slips seat that groove is installed, the upper surface that upper slips seat is installed groove is tapered slope wide at the top and narrow at the bottom, at upper slips seat, one on groove is installed and is fixed with upper slips seat lug, the frustum that upper slips seat lug is big up and small down, in the external wall of upper portion of lower slips seat, there is annular lower slips seat that groove is installed, the lower surface that lower slips seat is installed groove is up-narrow and down-wide tapered slope, at lower slips, one on groove is installed and is fixed with lower slips seat lug, lower slips seat lug is up-narrow and down-wide frustum, slips is tubular, on slips, there is upper and lower interlaced slot, in the upper inside wall of slips and lower inner wall, there are respectively the upper suspension groove and the lower suspension groove that match with upper slips seat lug and lower slips seat lug, upper slips seat lug and lower slips seat lug lay respectively in suspension groove and lower suspension groove, the upper surface of slips and lower surface are respectively the inclined-plane matching with the tapered slope of upper slips seat installation groove upper surface and the tapered slope of lower slips seat installation groove lower surface, between the bottom of slips and the top of lower slips seat, be installed with slips shear pin, in the external wall of upper portion of slips, be distributed with crown pawl down, on the bottom outer wall of slips, be distributed with crown pawl upward, the lower inner wall of lower slips seat has groove under annular installation, the upper surface that lower groove is installed is up-narrow and down-wide taper surface, the outer wall of lower slips seat and the upper end of piston assembly are fixedly installed togather by setting shear pin, piston assembly comprises piston cylinder, the outer wall of the lower end of lower slips seat and the piston cylinder of piston assembly is fixedly installed togather, between mandrel inside and piston assembly, there is pressure transmission passage, upper slips seat, lower slips seat, slips and piston assembly are set on ratchet mandrel, lower slips seat, between piston cylinder and ratchet mandrel, form annular conical cavity, in the conical cavity of piston cylinder upper end, be set with spring base, in the top of conical cavity, be set with install under the ratchet lock dog that matches of the taper surface of groove, in toroidal cavity between ratchet lock dog and spring base, spring is installed, on the inwall of ratchet lock dog, be distributed with crown pawl down, on the ratchet mandrel above ratchet lock dog, be distributed with crown pawl upward, in the lower inner wall of piston cylinder, one is fixed with in the piston that internal diameter and ratchet outside diameter of mandrel match and encircles platform, in piston, encircle on the ratchet mandrel outer wall above platform and be installed with C type ring, the inwall of piston assembly respectively with the bottom outer wall of mandrel, the bottom outer wall of ratchet mandrel is fixedly installed togather.
2. hydraulic setting according to claim 1 presses down deblocking packer, it is characterized in that seal assembly comprises packing element pressed on ring, packing element inner sleeve, upper packing element, middle packing element and lower rubber cylinder, in the external wall of upper portion of packing element pressed on ring, there is sealing that annular groove is installed, packing element upper ring cap is contained on ratchet mandrel and annular groove is installed in sealing and lower installation annular groove is fixedly installed togather, between packing element pressed on ring and ratchet mandrel, form slip toroidal cavity, between upper surface inside the upper surface of lower installation annular groove inner side and packing element pressed on ring, form the inner small and outside big taper ring cavity matching with locking key, on the inwall of the lower end of packing element pressed on ring, one is encircled platform in being fixed with and hanging, on the upper end outer wall of packing element inner sleeve, one is fixed with and hangs outer shroud platform, the external diameter of the internal diameter of packing element inner sleeve and ratchet mandrel matches, hanging outer shroud platform is positioned at the slip toroidal cavity the seat that hang ring platform top and encircles on platform in suspension, the lower end outer wall of packing element inner sleeve and the upper end inwall of upper slips seat are fixedly installed togather, in the packing element of the supreme slip spider of packing element pressed on ring, put and be set with successively packing element from top to bottom, middle packing element and lower rubber cylinder, middle packing element is the annular frustum of inner wide and outer narrow, the inclined-plane that the lower surface of upper packing element matches for the upper surface with middle packing element, the inclined-plane that the upper surface of lower rubber cylinder matches for the lower surface with middle packing element, the lower end of packing element pressed on ring and the upper end of upper packing element offset, the upper end of upper slips seat and the lower end of lower rubber cylinder offset.
3. hydraulic setting according to claim 2 presses down deblocking packer, it is characterized in that being installed with sealing ring on the upper end inwall of packing element inner sleeve, on the outer wall of suspension outer shroud platform, be installed with sealing ring, between the lower end of packing element inner sleeve and the upper end of upper slips seat, be installed with sealing ring; Or/and annular groove is installed in sealing and lower installation annular groove is fixedly installed togather by screw thread, the lower end outer wall of packing element inner sleeve and the upper end inwall of upper slips seat are fixedly installed togather by screw thread.
4. according to the hydraulic setting described in claim 1 or 2 or 3, press down deblocking packer, it is characterized in that piston assembly comprises piston cylinder, piston urceolus, pressure tube and piston lower contact, the outer wall of lower slips seat and piston urceolus are fixedly installed togather by setting shear pin, in the lower inner wall of piston urceolus, one is fixed with in annular installation and encircles platform, in installing, the ring inwall of platform and the bottom outer wall of ratchet mandrel are fixedly installed togather, piston cylinder is positioned at installs the piston urceolus of ring platform top and the toroidal cavity that ratchet mandrel forms, on the outer wall of the bottom of piston cylinder, one is fixed with the piston outer shroud platform that external diameter and piston urceolus internal diameter match, top bar installing hole and the installing hole of getting out of a predicament or an embarrassing situation that in the upper inside wall of piston lower contact, have internal diameter to reduce successively, the lower end of ratchet mandrel is positioned at the installing hole of topping bar, the lower end of mandrel is positioned at the get out of a predicament or an embarrassing situation inwall of installing hole and the installing hole of getting out of a predicament or an embarrassing situation and the bottom outer wall of mandrel and is fixedly installed togather, in installing, in ring platform, there is the axial up-small and down-big hole of topping bar, in the top of piston lower contact, there is up big and down small the get out of a predicament or an embarrassing situation hole corresponding with the hole of topping bar, there is the radial direction through hole communicating with the hole of getting out of a predicament or an embarrassing situation the get out of a predicament or an embarrassing situation lower end in hole of correspondence, the pressure tube that external diameter and top bar hole macropore internal diameter and the hole macropore internal diameter of getting out of a predicament or an embarrassing situation match is installed in the macropore in the macropore in the hole of topping bar and the hole of getting out of a predicament or an embarrassing situation, there is axial passage the inside of pressure tube, outer end at radial direction through hole is installed with plug, the top bar aperture in hole, axial passage, the get out of a predicament or an embarrassing situation aperture in hole, the inner of radial direction through hole is connected and forms pressure transmission passage, the inwall of ring platform in piston, on the outer wall of piston outer shroud platform, be installed with respectively sealing ring, in installing, between ring platform and ratchet mandrel, be installed with sealing ring, the top bar macropore inwall in hole and the macropore inwall in the hole of getting out of a predicament or an embarrassing situation is installed with sealing ring respectively and between the outer wall of pressure tube.
5. hydraulic setting according to claim 4 presses down deblocking packer, it is characterized in that the lower end of ratchet mandrel and top bar being installed with sealing ring between installing hole inwall the lower end of mandrel and get out of a predicament or an embarrassing situation and be installed with sealing ring between installing hole inwall; Or/and the ring inwall of platform and the bottom outer wall of ratchet mandrel are fixedly installed togather by screw thread in installing, the bottom outer wall of the inwall of the installing hole of getting out of a predicament or an embarrassing situation and mandrel is fixedly installed togather by screw thread.
6. according to the hydraulic setting described in claim 1 or 2 or 3, press down deblocking packer, it is characterized in that being installed with steady pin between the locking key urceolus of internal projecting ring below and deblocking ratchet; Or/and, on deblocking ratchet and ratchet lock dog, there is respectively upper and lower interlaced slot; Or/and, on the ratchet mandrel of corresponding limited ring dais below installation groove, there is balance pipe.
7. hydraulic setting according to claim 4 presses down deblocking packer, it is characterized in that being installed with steady pin between the locking key urceolus of internal projecting ring below and deblocking ratchet; Or/and, on deblocking ratchet and ratchet lock dog, there is respectively upper and lower interlaced slot; Or/and, on the ratchet mandrel of corresponding limited ring dais below installation groove, there is balance pipe.
8. hydraulic setting according to claim 5 presses down deblocking packer, it is characterized in that being installed with steady pin between the locking key urceolus of internal projecting ring below and deblocking ratchet; Or/and, on deblocking ratchet and ratchet lock dog, there is respectively upper and lower interlaced slot; Or/and, on the ratchet mandrel of corresponding limited ring dais below installation groove, there is balance pipe.
9. hydraulic setting according to claim 4 presses down deblocking packer, it is characterized in that being installed with sealing ring between the lower end of lower slips seat and the outer wall of piston cylinder; Or/and the lower end of lower slips seat and the outer wall of piston cylinder are fixedly installed togather by screw thread, there is internal thread the upper end of mandrel, and there is external screw thread the lower end of piston lower contact.
10. according to the hydraulic setting described in claim 5 or 6 or 7, press down deblocking packer, it is characterized in that being installed with sealing ring between the lower end of lower slips seat and the outer wall of piston cylinder; Or/and the lower end of lower slips seat and the outer wall of piston cylinder are fixedly installed togather by screw thread, there is internal thread the upper end of mandrel, and there is external screw thread the lower end of piston lower contact.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410297238.5A CN104047563B (en) | 2014-06-28 | 2014-06-28 | Deblocking packer is pressed under hydraulic setting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410297238.5A CN104047563B (en) | 2014-06-28 | 2014-06-28 | Deblocking packer is pressed under hydraulic setting |
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| CN104047563A true CN104047563A (en) | 2014-09-17 |
| CN104047563B CN104047563B (en) | 2016-08-24 |
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| CN105041260A (en) * | 2015-07-21 | 2015-11-11 | 中国海洋石油总公司 | KCMF-type pressure-expansible insert seal |
| CN108894729A (en) * | 2018-09-18 | 2018-11-27 | 中国石油集团西部钻探工程有限公司 | Hydraulic pushing type rotary steerable tool |
| CN109653694A (en) * | 2019-02-19 | 2019-04-19 | 中科金佳（北京）油田技术开发有限公司 | A kind of bearing assembly for tubing string |
| CN110952950A (en) * | 2018-09-26 | 2020-04-03 | 中国石油天然气股份有限公司 | Packer (CN) |
| CN113073958A (en) * | 2021-03-19 | 2021-07-06 | 中国石油天然气集团有限公司 | Recyclable bridge plug and using method |
| CN113090222A (en) * | 2021-05-14 | 2021-07-09 | 大庆市晟威机械制造有限公司 | Oil field is packer in pit |
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| CN109653694B (en) * | 2019-02-19 | 2024-03-08 | 中科金佳（北京）油田技术开发有限公司 | Bearing assembly for tubular column |
| CN113073958A (en) * | 2021-03-19 | 2021-07-06 | 中国石油天然气集团有限公司 | Recyclable bridge plug and using method |
| CN113090222A (en) * | 2021-05-14 | 2021-07-09 | 大庆市晟威机械制造有限公司 | Oil field is packer in pit |
| CN113090222B (en) * | 2021-05-14 | 2021-09-24 | 大庆市晟威机械制造有限公司 | Oil field is packer in pit |
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| CN104047563B (en) | 2016-08-24 |
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