Reliable packerTechnical field
the present invention relates to the packer technology field that the solid completion practice of oil gas field uses, is a kind of reliable packer.
Background technology
completion practice is the important technical being connected drilling well and oil producing operation, and meanwhile, completion is again the underground work of dangerous, and therefore, the success or not of completion practice, will directly cause the success or failure of a bite well.Particularly current, that explores along with shale gas, fine and close wet goods unconventionaloil pool field deepens continuously, and people are for carrying out the research of such Reservoir Development also in continuous reinforcement.For the exploitation of such oil-gas reservoir, carry out pressure break completion and to be also absolutely necessary technological means.Be no matter the completion practice that the conventional gas and oil completion of hiding or unconventionaloil pool hide Oil/gas Well, an indispensable technological means is exactly the isolation operation utilizing packer to carry out shaft bottom reservoir.In conventional gas and oil is hidden, packer is utilized to carry out the annular space sealing in sleeve pipe, the sealing between bore hole reservoir and tubing string; Hide in completion practice at unconventionaloil pool, also need to utilize the isolation that packer carries out between annular space sealing in sleeve pipe and different reservoir, therefore, packer is requisite technological means in completion practice, and the importance of packer has some idea of.At present, the packer that Oil Field uses, be mostly hydraulic action packer from structural principle, this meaning in the use of packer is all identical; But the on-the-spot hydraulic packer used carries out design effectively owing to not sitting extension to the mistake of packer, therefore, at the scene in work progress, it is comparatively large that it occurs sitting the possibility of hanging by mistake, poor reliability; And once sit and hang entering the mistake occurring packer in well process, it bring very big inconvenience will to follow-up completion practice, even cannot the generation of serious accident of normal construction by there will be this well.
Summary of the invention
the invention provides a kind of reliable packer, overcome the deficiency of above-mentioned prior art, its can effectively solve existing packer exist easily cause sit extension, poor reliability by mistake, even cause the follow-up problem that cannot construct.
technical scheme of the present invention is realized by following measures: a kind of reliable packer, comprises beam barrel body, interstage sleeve, packing element packing device, jaw cover, plunger barrel, plunger shear pin, sealing drum, packing element shear pin and anti-deblocking device; The upper outside of beam barrel body has cylindrical shell outer lug boss, is positioned at outside the beam barrel body below cylindrical shell outer lug boss and is set with interstage sleeve, packing element packing device and jaw cover from top to bottom successively; The lower circumference of jaw cover is intervally distributed with the sealing calvus being no less than two, and lower inside and the outside of sealing calvus are fixed with interior rest shoe and outer rest shoe respectively, limited location annular groove outside the beam barrel body of corresponding interior rest shoe position, and interior rest shoe is positioned at limited ring groove; Be installed with plunger barrel by plunger shear pin outside the beam barrel body of corresponding outer rest shoe lower position, the upper inner of plunger barrel has inner groove, and inner groove upper inner is pressed on the outside of outer rest shoe; Between bottom corresponding outer rest shoe and bottom inner groove position beam barrel body on circumferentially have at least one through hole that builds the pressure; The outside of jaw cover is installed with the sealing drum be sleeved on outside plunger barrel, be installed with outside the beam barrel body of corresponding plunger barrel lower position and be positioned at sealing drum lower inside and jaw can be stoped to overlap descending anti-deblocking device, between anti-deblocking device and sealing drum, be installed with packing element shear pin; The top and bottom of beam barrel body are respectively arranged with internal thread or external screw thread.
here is the further optimization and/or improvements to foregoing invention technical scheme:
above-mentioned anti-deblocking device can comprise pawl mandrel and pawl ring, be installed with outside the beam barrel body of corresponding plunger barrel lower position and be positioned at pawl mandrel, there is the first land outside the middle part of pawl mandrel, outside the pawl mandrel being positioned at the first land lower outer position, have the second land; The upper outside of pawl mandrel is set with seat in the pawl ring at the first land top, pawl ring set is contained in sealing drum inside and is fixedly installed togather by pin for suppressing metal with sealing drum, the inwall of pawl ring is distributed with retaining pawl, the pawl mandrel upper outside of corresponding pawl ring moving travel position is provided with the mandrel pawl matched with retaining pawl; The base part seat of sealing drum, in the second land top, is fixedly installed togather by packing element shear pin outside the lower inside of sealing drum and the first land.
the build the pressure bottom inside of inner groove of through hole lower position of above-mentioned correspondence can be set with stationary half, in correspondence stationary half position beam barrel body outside have upper outer groove, the inner side of upper stationary half is fixedly mounted in outer groove; The head base of pawl mandrel has lower stationary half, and have lower outer groove outside the beam barrel body of corresponding lower stationary half position, the inner side of lower stationary half is arranged in lower outer groove; The pawl mandrel lower outside of corresponding second land lower position is installed with fixed cover, the lower inside of fixed cover is fixed with and is sleeved on outside beam barrel body and the land be positioned at below pawl mandrel, location semi-ring is provided with between the bottom of pawl mandrel and the top of interior land, have positioning ring groove outside the beam barrel body of corresponding location half ring position, the inner side of location semi-ring is arranged in positioning ring groove.
be fixedly installed togather by being threaded with the upper inner of sealing drum outside the middle part of above-mentioned jaw cover, the jaw cover upper outside of corresponding sealing drum top position is fixed with seat in the limited ring dais at sealing drum top; Plunger shear pin is positioned at the bottom of plunger barrel, between the outside of jaw below screwing position cover and the inwall of sealing drum, outside the inside middle portion that overlaps of jaw and beam barrel body and bottom corresponding inner groove and between plunger shear pin position plunger barrel inside and outside beam barrel body between and outside plunger barrel and inside sealing drum between be provided with the sealing ring that builds the pressure.
above-mentioned packing element packing device can comprise upper outside packing element, quantity is no less than the interior packing element of and lower outside packing element; Upper outside packing element, interior packing element and lower outside packing element are sleeved on outside beam barrel body from top to bottom successively, are fixed with bracketing ring in the middle part of the inwall of interior packing element, the inwall of bracketing ring have pushing out ring seal groove, are provided with pushing out ring sealing ring in pushing out ring seal groove.
according to demand, the quantity of interior packing element can be two.
above-mentioned on the upside of the top of upper outside packing element and lower outside packing element bottom on the downside of all can be provided with the sheath be sleeved on outside beam barrel body; Between upper outside packing element and interior packing element, adjacent between packing element and be provided with the back-up ring be sleeved on outside beam barrel body between interior packing element and lower outside packing element.
the lower end outside of above-mentioned interstage sleeve can be fixed with outer lug boss, lower outer lug boss is fixed with outside the upper end of jaw cover, in upper mounting groove between upper outer lug boss and beam barrel body of the sheath top at upper outside packing element top, in the lower mounting groove of the sheath bottom bottom lower outside packing element between lower outside boss and beam barrel body.
reasonable and compact in structure of the present invention; easy to use; it can form position limitation protection to plunger barrel by arranging sealing drum; thus can effectively avoid the present invention under enter the interference effect power of the process China and foreign countries bound pair plunger barrel in precalculated position; guarantee the pressuring action of its external rest shoe; thus effectively prevent jaw from overlapping up and therefore and the mistake caused is sat and hung, there is good reliability, thus avoid bringing harmful effect to subsequent construction.
Accompanying drawing explanation
accompanying drawing 1 is that the master of preferred embodiment looks half section structural representation.
accompanying drawing 2 is that the amplification of jaw cover in accompanying drawing 1 mainly looks half section structural representation.
coding in accompanying drawing is respectively: 1 is beam barrel body, 2 is interstage sleeve, 3 is jaw cover, 4 is plunger barrel, 5 is plunger shear pin, 6 is sealing drum, 7 is packing element shear pin, 8 is cylindrical shell outer lug boss, 9 is sealing calvus, 10 is interior rest shoe, 11 is outer rest shoe, 12 is limited ring groove, 13 is inner groove, 14 is the through hole that builds the pressure, 15 is pawl mandrel, 16 is pawl ring, 17 is the first land, 18 is the second land, 19 is pin for suppressing metal, 20 is upper stationary half, 21 is lower stationary half, 22 is fixed cover, 23 is interior land, 24 is location semi-ring, 25 is limited ring dais, 26 is the sealing ring that builds the pressure, 27 is upper outside packing element, 28 is interior packing element, 29 is lower outside packing element, 30 is bracketing ring, 31 is pushing out ring sealing ring, 32 is sheath, 33 is back-up ring, 34 is upper outer lug boss, 35 is lower outer lug boss.
Detailed description of the invention
the present invention by the restriction of following embodiment, can not 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 all be described according to the Butut mode of Figure of description 1, as: the position relationship of forward and backward, upper and lower, left and right etc. determines 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, this reliable packer comprises beam barrel body 1, interstage sleeve 2, packing element packing device, jaw cover 3, plunger barrel 4, plunger shear pin 5, sealing drum 6, packing element shear pin 7 and anti-deblocking device; The upper outside of beam barrel body 1 has cylindrical shell outer lug boss 8, is positioned at outside the beam barrel body 1 below cylindrical shell outer lug boss 8 and is set with interstage sleeve 2, packing element packing device and jaw cover 3 from top to bottom successively; The lower circumference of jaw cover 3 is intervally distributed with the sealing calvus 9 being no less than two, lower inside and the outside of sealing calvus 9 are fixed with interior rest shoe 10 and outer rest shoe 11 respectively, limited location annular groove 12 outside the beam barrel body 1 of corresponding interior rest shoe 10 position, interior rest shoe 10 is positioned at limited ring groove 12; Be installed with plunger barrel 4 by plunger shear pin 5 outside the beam barrel body 1 of corresponding outer rest shoe 11 lower position, the upper inner of plunger barrel 4 has inner groove 13, and inner groove 13 upper inner is pressed on the outside of outer rest shoe 11; Between bottom corresponding outer rest shoe 11 and bottom inner groove 13 position beam barrel body 1 on circumferentially have at least one through hole 14 that builds the pressure; The outside of jaw cover 3 is installed with the sealing drum 6 be sleeved on outside plunger barrel 4, be installed with outside the beam barrel body 1 of corresponding plunger barrel 4 lower position and be positioned at sealing drum 6 lower inside and jaw can be stoped to overlap 3 descending anti-deblocking devices, between anti-deblocking device and sealing drum 6, be installed with packing element shear pin 7; The top and bottom of beam barrel body 1 are respectively arranged with internal thread or external screw thread.According to demand, the shear strength of plunger shear pin 5 should lower than the shear strength of packing element shear pin 7.In use, the chamber that builds the pressure is formed between outside beam barrel body 1, inside jaw cover 3, plunger barrel 4 and sealing drum 6, after the present invention is lowered into well depth precalculated position according to design attitude, by pitching build the pressure operation make high-pressure fluid from the through hole 14 that builds the pressure enter in the chamber that builds the pressure formed build the pressure, when pressure exceedes the shear strength of plunger shear pin 5, plunger shear pin 5 will be cut off, and plunger barrel 4 by descending, thus unclamps pressing of its external rest shoe 11; When pressure durations increase to cut off packing element shear pin 7 time, jaw cover 3 will drive sealing drum 6 up, thus extrude packing element packing device, realize setting.In this process; sealing drum 6 defines the position limitation protection to plunger barrel 4; can effectively avoid the present invention under enter the interference effect power of the process China and foreign countries bound pair plunger barrel 4 in precalculated position; guarantee the pressuring action of its external rest shoe 11; thus effectively prevent jaw from overlapping 3 up and therefore and the mistake caused is sat and hung; there is good reliability, thus avoid bringing harmful effect to subsequent construction.
according to actual needs, above-mentioned reliable packer can be made further optimization and/or improvements:
as shown in accompanying drawing 1,2, anti-deblocking device comprises pawl mandrel 15 and pawl ring 16, be installed with outside the beam barrel body 1 of corresponding plunger barrel 4 lower position and be positioned at pawl mandrel 15, there is the first land 17 outside the middle part of pawl mandrel 15, outside the pawl mandrel 15 being positioned at the first land 17 lower outer position, have the second land 18; The upper outside of pawl mandrel 15 is set with seat in the pawl ring 16 at the first land 17 top, pawl ring 16 is sleeved on sealing drum 6 inside and is fixedly installed togather by pin for suppressing metal 19 with sealing drum 6, the inwall of pawl ring 16 is distributed with retaining pawl, pawl mandrel 15 upper outside of corresponding pawl ring 16 moving travel position is provided with the mandrel pawl matched with retaining pawl; The base part seat of sealing drum 6, in the second land 18 top, is fixedly installed togather by packing element shear pin 7 outside the lower inside of sealing drum 6 and the first land 17.Retaining pawl and cylinder core pawl with the use of, can guarantee sealing drum 6 and jaw cover 3 not descending by the interference of other external force in well, guarantee that it can continue after packing cut off by pin setting.
as shown in Figure 1, the build the pressure bottom inside of inner groove 13 of through hole 14 lower position of correspondence is set with stationary half 20, in correspondence stationary half 20 position beam barrel body 1 outside have upper outer groove, the inner side of upper stationary half 20 is fixedly mounted in outer groove; The head base of pawl mandrel 15 has lower stationary half 21, and have lower outer groove outside the beam barrel body 1 of corresponding lower stationary half 21 position, the inner side of lower stationary half 21 is arranged in lower outer groove; Pawl mandrel 15 lower outside of corresponding second land 18 lower position is installed with fixed cover 22, the lower inside of fixed cover 22 is fixed with and is sleeved on outside beam barrel body 1 and the land 23 be positioned at below pawl mandrel 15, location semi-ring 24 is provided with between the bottom of pawl mandrel 15 and the top of interior land 23, have positioning ring groove outside the beam barrel body 1 of semi-ring 24 position, corresponding location, the inner side of location semi-ring 24 is arranged in positioning ring groove.Upper stationary half 20 and lower stationary half 21 can realize the stroke limit to plunger barrel 4, and it is spacing that lower stationary half 21 and location semi-ring 24 can realize pawl mandrel 15, and it is spacing that location semi-ring 24 also can realize fixed cover 22.
as shown in accompanying drawing 1,2, be threaded connection with the upper inner of sealing drum 6 outside the middle part of jaw cover 3 and be fixedly installed togather, the jaw of corresponding sealing drum 6 top position is overlapped 3 upper outside and is fixed with seat in the limited ring dais 25 at sealing drum 6 top; Plunger shear pin 5 is positioned at the bottom of plunger barrel 4, between the outside of jaw below screwing position cover 3 and the inwall of sealing drum 6, outside the jaw inside middle portion that overlaps 3 and beam barrel body 1 and bottom corresponding inner groove 13 and between plunger shear pin 5 position plunger barrel 4 inside and outside beam barrel body 1 between and outside plunger barrel 4 and inside sealing drum 6 between be provided with the sealing ring 26 that builds the pressure.
as shown in Figure 1, packing element packing device comprises upper outside packing element 27, quantity is no less than interior packing element 28 and the lower outside packing element 29 of; Upper outside packing element 27, interior packing element 28 and lower outside packing element 29 are sleeved on outside beam barrel body 1 from top to bottom successively, are fixed with bracketing ring 30, the inwall of bracketing ring 30 have pushing out ring seal groove, be provided with pushing out ring sealing ring 31 in pushing out ring seal groove in the middle part of the inwall of interior packing element 28.Bracketing ring 30 and pushing out ring sealing ring 31 can make packing element packing device still guarantee the ability of low pressure packing when meeting high pressure packing; Long and short packing element with the use of its packing scarce capacity can be solved, easily alter the problems such as layer, make it have good setting effect.
according to demand, the quantity of interior packing element 28 is two.
as shown in Figure 1, on the upside of the top of upper outside packing element 27 and on the downside of the bottom of lower outside packing element 29, the sheath 32 be sleeved on outside beam barrel body 1 is provided with; Between upper outside packing element 27 and interior packing element 28, adjacent between packing element 28 and be provided with the back-up ring 33 be sleeved on outside beam barrel body 1 between interior packing element 28 and lower outside packing element 29.Packing element is when being squeezed, and sheath 32 and back-up ring 33 can avoid it to occur wavy distortion.
as shown in accompanying drawing 1,2, the lower end outside of interstage sleeve 2 is fixed with outer lug boss 34, lower outer lug boss 35 is fixed with outside the upper end of jaw cover 3, in upper mounting groove between upper outer lug boss 34 and beam barrel body 1 of sheath 32 top at upper outside packing element 27 top, in the lower mounting groove of sheath 32 bottom bottom lower outside packing element 29 between lower outside boss 35 and beam barrel body 1.
above technical characteristic constitutes most preferred embodiment of the present invention, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.