The content of the invention
The purpose of the present invention is to be that providing a kind of compound action layering vapour drives packer, is carried out using compound action modeSetting, good sealing effect, heat resisting and pressure resisting is strong, is easy to deblocking, overcomes the defect of prior art.
Therefore, the present invention proposes that a kind of compound action layering vapour drives packer, it includes：
One central tube, its two ends are connected with top connection and lower contact by external screw thread correspondence, and its side wall is provided with pressure transmission hole；
One exterior central tube, it is set on the central tube, its upper end can be separated by a cutting portion with it is described on connectThe lateral surface of head is connected, and the exterior central tube outer sheath is provided with regulation ring and cartridge, and the upper end of the regulation ring is spirally connectedOutside in the cutting portion, its lower end is in contact with the upper end of the cartridge；
One dilation, including one be set on expansion inner cylinder on the exterior central tube, the expansion inner cylinder and be arranged withOvercoat is expanded, is formed between the expansion inner cylinder and expansion overcoat in an annular seal space, the annular seal space filled with the vaporization that can be heatedTo promote the inflation fluid that the expansion overcoat is moved up, the upper end of the expansion overcoat is in contact with the lower end of the cartridge,A locking stopping mechanism that can prevent the expansion inner cylinder from moving down is provided between the expansion inner cylinder and the exterior central tube；
One can promote the promotion part that the dilation is moved up in fluid injection, and it is set on the central tube, and phaseAdjacent to the downside of the dilation, seal and touch between the promotion part and the lateral surface of lower contact, between the two provided with oneThe sealing ring cavity injected for liquid, the sealing ring cavity is connected with the pressure transmission hole.
Compound action layering vapour as described above drives packer, wherein, the locking stopping mechanism include a lock sleeve,One closing piece and a retaining ring, the lock sleeve are set on the exterior central tube, and its lateral surface is provided with can be with the retaining ringThe zigzag retaining tooth locked together, the expansion inner cylinder is set on the lock sleeve, and the retaining ring is embedded in describedOn the inwall for expanding inner cylinder lower end, the bottom of the closing piece is embedded at the groove formed on the wall of the exterior central tube side, outside itEnd is embedded at the neck of the medial surface formation of the lock sleeve, wherein, a groove is additionally provided with the lateral surface of the central tube,The groove is adjacent to the downside of the closing piece, and when the central tube is moved up, the closing piece can be placed in the groove.
Compound action layering vapour as described above drives packer, wherein, the lateral surface of the expansion inner cylinder lower end is convexly equipped withOne outer portion, the outer portion and the medial surface of the expansion overcoat are mutually closely connected, and the upper end of the expansion overcoat is radially inwardExtension is formed with an internal ring portion, and the front end face of the internal ring portion is in contact with the lower end of the cartridge, thereafter end face and instituteThe upper end end face for stating expansion inner cylinder is mutually closely connected, wherein, separately it is convexly equipped with a stripper loop, the separation on the inwall of the expansion overcoatThe lateral surface of ring and the expansion inner cylinder is mutually closely connected, it is described expand the lateral surface of inner cylinder, it is the medial surface of the expansion overcoat, describedOuter portion and stripper loop, which are enclosed, is formed with annular seal space described in one.
Compound action layering vapour as described above drives packer, wherein, the cutting portion includes a shear sleeve and firstShear pin, the shear sleeve from top to bottom includes the first ring portion and the second ring portion, and the internal diameter of first ring portion is more than instituteThe internal diameter of the second ring portion is stated, it is set on the outside of the top connection, and passes through first shear pin and the top connection phaseConnection, the second ring portion sealing is set on the central tube, and the upper end of the regulation ring is then socketed in first ring portionOutside, the upper end of the exterior central tube is connected by internal thread with the lateral surface of second ring portion.
Compound action layering vapour as described above drives packer, wherein, shape between the exterior central tube and the central tubeCheng Youyi annular spaces, the annular space adjacent to the second ring portion of the shear sleeve on the downside of, be placed with a pressure ring and one in the annular spaceSealing ring, the pressure ring and sealing ring are closely connected to be set on the lateral surface of the central tube.
Compound action layering vapour as described above drives packer, wherein, the pushing part point includes from top to bottom covering successivelySupport set and piston on the central tube are located at, the upper end of the support set is connected to the expansion inner cylinder and expands overcoatLower end, its lower end is socketed on the upper end of the piston, and the lateral surface of the piston and the central tube is mutually closely connected, outside its lower endSide axially extend to be formed ring ear sealing be set on the lateral surface of the lower contact, the piston lower surface with it is described underThe upper surface of joint is adjacent, and the sealing ring cavity being connected with the pressure transmission hole is formed between the two.
Compound action layering vapour as described above drives packer, wherein, the lateral surface of the lower contact is separately socketed with one and cutRing is cut, the lower end of the ring ear is set on the shearing ring, and is connected by the second shear pin with the shearing ring.
Compound action layering vapour as described above drives packer, wherein, the lateral surface of the lower contact with the ring earThe position being in contact and the medial surface of the piston are embedded with seal washer respectively.
Compound action layering vapour as described above drives packer, wherein, the compound action layering vapour drives the outer of packerFootpath is 152mm, and its internal diameter is 62mm.
Compound action that the present invention is provided layering vapour drives packer, carried out using compound action mode setting, it is to avoid listThe shortcoming that one setting mode is present, good sealing effect, heat resisting and pressure resisting is strong, due to no anchor mechanism, and solution sealing mechanism safely may be usedLean on, be easy to deblocking, good sealing effectiveness can be reached, possess preferable construction success rate.
The compound action layering vapour that the present invention is provided drives packer, it is adaptable to which hollow layering vapour drives technique and heavy crude heat extractionThe techniques such as steam drive, steam soak, it is adaptable to highest well temperature up to 350 DEG C steam drive, can pressure-resistant 18MPa, with extensiveApplication prospect.
Embodiment
The present invention proposes that a kind of compound action layering vapour drives packer, and it includes：One central tube, its two ends pass through external screw threadCorrespondence is connected with top connection and lower contact, and its side wall is provided with pressure transmission hole；One exterior central tube, it is set on the central tube,Its upper end is connected by what a cutting portion can be separated with the lateral surface of the top connection, and the exterior central tube outer sheath is provided with tuneRing and cartridge are saved, the upper end of the regulation ring is bolted in the outside in the cutting portion, its lower end and the cartridgeUpper end is in contact；One dilation, including one be set on expansion inner cylinder on the exterior central tube, the expansion inner cylinder and be arrangedThere is expansion overcoat, an annular seal space is formed between the expansion inner cylinder and expansion overcoat, interior be filled with of the annular seal space can be by hot vapourChange to promote the inflation fluid that the expansion overcoat is moved up, the upper end of the expansion overcoat connects with the lower end of the cartridgeTouch, a locking stopping mechanism that can prevent the expansion inner cylinder from moving down is provided between the expansion inner cylinder and the exterior central tube；One can promote the promotion part that the dilation is moved up in fluid injection, and it is set on the central tube, and adjacent to describedThe downside of dilation, seals between the promotion part and the lateral surface of lower contact and touches, noted for liquid provided with one between the twoThe sealing ring cavity entered, the sealing ring cavity is connected with the pressure transmission hole.
The compound action layering vapour of the present invention drives packer, and setting, good sealing effect is carried out using compound action mode, resistance toWarm resistance to pressure is strong, is easy to deblocking.
In order to which technical characteristic, purpose and effect to the present invention are more clearly understood from, below in conjunction with accompanying drawing and preferablyEmbodiment, vapour is layered to compound action proposed by the present invention and drives the embodiment for constituting structural representation of packer, knotStructure, feature and effect, are described in detail as after.In addition, by the explanation of embodiment, when can reach predetermined to the present inventionThe technological means and effect that purpose is taken are able to more deep specific understanding, but institute's accompanying drawing is only to provide reference and explanationWith not for being any limitation as to the present invention.
Fig. 1 drives the composition structural representation of packer for the compound action layering vapour of the present invention.
As shown in figure 1, compound action layering vapour proposed by the present invention drives packer, it includes：
One central tube 1, its two ends are connected with top connection 11 and lower contact 12 by external screw thread correspondence, the central tube 1Side wall is provided with pressure transmission hole 101；
One exterior central tube 3, is set on the central tube 1, its upper end can be separated by a cutting portion with it is described on connectFirst 11 lateral surface is connected, and the outer sheath of exterior central tube 3 is provided with regulation ring 31 and cartridge 32, the regulation ring 31Upper end is bolted in the outside in the cutting portion, and its lower end is in contact with the upper end of the cartridge 32, wherein, utilize regulation ring31 with the relation that is spirally connected in cutting portion, its position can be adjusted, so that adjust that it contacts between cartridge 32 as needed is tightClose degree, in addition, the cartridge 32 is preferred to use soft graphite and is made；
One dilation 4, including one be set on expansion inner cylinder 41 on the exterior central tube 3, the expansion inner cylinder 41An expansion overcoat 42 is arranged with, is formed and is filled out in an annular seal space, the annular seal space between the expansion inner cylinder 41 and expansion overcoat 42Filled with vaporization can be heated to promote the inflation fluid (not shown) that moves up of expansion overcoat 42, the expansion overcoat 42 it is upperEnd is in contact with the lower end of the cartridge 32, can be prevented provided with one between the expansion inner cylinder 41 and the exterior central tube 3The locking stopping mechanism that the expansion inner cylinder 41 is moved down；
One can promote the promotion part 6 that the dilation 4 is moved up in fluid injection, and it is set on the central tube 1, andAdjacent to the downside of the dilation 4, seal and touch between the promotion part 6 and the lateral surface of lower contact 12, between the twoProvided with a sealing ring cavity 60 injected for liquid, the sealing ring cavity 60 is connected with the pressure transmission hole 101.When by describedThe inner chamber of heart pipe 1 and pressure transmission hole 101 are into the sealing ring cavity 60 during fluid injection, and liquid stream can produce hydraulic pressure in sealing ring cavity 60Power, and in the presence of hydraulic coupling, promoted by sealing the inwall of ring cavity 60 on the related dilation 4 in the promotion part 6Move, to compress the cartridge 32, realize the sealing with down-hole casing and set operation.
Thus, when into the inner chamber of the central tube 1, fluid injection is suppressed, liquid stream enters described close from the pressure transmission hole 101Seal ring intracavitary, under the promotion of hydraulic coupling, the promotion part is promoted on the expansion inner cylinder 41 and expansion overcoat 42 of dilation 4Move, on the one hand, cartridge 32 described in the expansion upward pushing tow of overcoat 42 is compressed, and makes the cartridge 32 and down-hole casingInwall on set, on the other hand, by setting locking stopping mechanism, stopping after fluid injection suppresses, being avoided that the bulge4 are divided to be moved down under the propulsive thrust effect of cartridge 32, so that setting reliable.
It is preferred that the locking stopping mechanism includes a lock sleeve 51, a closing piece 52 and a retaining ring 53, the lockingSet 51 is set on the exterior central tube 2, and its lateral surface is provided with the zigzag retaining tooth that can be locked together with the retaining ring 53(not indicated in figure), the expansion inner cylinder 41 is set on the lock sleeve 51, and the retaining ring 53 is embedded in described swollen, can be with its adjacent saw in downside after the retaining ring 53 is moved up with the expansion inner cylinder 41 on the inwall of the swollen lower end of inner cylinder 41Tooth form retaining tooth phase clip is sealed, the back stretch that 32 pairs of the cartridge dilation 4 is produced is overcome, so as to keep awayExempt from the expansion inner cylinder 41 to move down, cartridge 32 is in all the time upon compression and set state；
The bottom of the closing piece 52 is embedded at the groove formed on the side wall of exterior central tube 3, and its outer end is embedded in instituteState at the neck 511 of medial surface formation of lock sleeve 51 so that can be mutually between the lock sleeve 51 and the exterior central tube 23Positioning, wherein, a groove 102 is additionally provided with the lateral surface of the central tube 1, the groove 102 is adjacent to the closing piece 53Downside, when the central tube 1 is moved up, the closing piece 53 can be placed in the groove 102, and departs from the lock sleeve 51Neck 511, makes to release between the lock sleeve 51 and the exterior central tube 3 and is mutually located state, with can be relative to the centerPipe 3 is moved down.
Refer to Fig. 1, the lateral surface of the lower end of expansion inner cylinder 41 is convexly equipped with an outer portion 411, the outer portion 411 withThe medial surface of the expansion overcoat 42 is mutually closely connected, and the upper end of the expansion overcoat 42 is radially inwardly extending to be formed with an internal ring portion421, the front end face of the internal ring portion 421 is in contact with the lower end of the cartridge 32, thereafter end face and the expansion inner cylinder41 upper end end face is mutually closely connected, wherein, separately it is convexly equipped with a stripper loop 422, the stripper loop on the inwall of the expansion overcoat 42422 is mutually closely connected with the lateral surface for expanding inner cylinder 41, the lateral surface of the expansion inner cylinder 41, the inner side of the expansion overcoat 42Face, the outer portion 411 and stripper loop 422, which are enclosed, is formed with annular seal space H described in one, in other words, outside the expansion inner cylinder 41Sideways, medial surface, the outer portion 411 and the internal ring portion 421 of the expansion overcoat 42, which are enclosed, is formed with a ring cavity, by settingThe stripper loop 422, makes part of the ring cavity between the stripper loop 422 and the outer portion 411 form the sealingChamber H.When in use, can more it be actually needed in the particular location of the expansion medial surface of overcoat 42 as the stripper loop 422, will not be from expansion inner cylinder 41 as long as meeting inflation fluid when the expansion overcoat 42 is moved up depending on annular seal space H volume sizeFlowed out at upper end.
As illustrated, the cutting portion includes a shear sleeve 2 and the first shear pin 13, the shear sleeve 2 is by up toUnder include the first ring portion 21 and the second ring portion 22, the internal diameter of first ring portion 21 is more than the internal diameter of second ring portion 22,It is set in the outside of the top connection 11, and is connected by first shear pin 13 with the top connection 11, and described theThe sealing of two ring portions 22 is set on the central tube 1, and the upper end of the regulation ring 31 is then socketed in the outside of the first ring portion 21,The upper end of the exterior central tube 3 is connected by internal thread with the lateral surface of second ring portion 22.As described in Figure, preferably cutThe lateral surface for cutting set 2 extends axially upward to form first ring portion 21, and its medial surface extends axially downward to form describedSecond ring portion 22.
Further, an annular space is formed between the exterior central tube 3 and the central tube 1, the annular space is adjacent to instituteState and a pressure ring 14 and a sealing ring 15 are placed with the downside of the second ring portion 22 of shear sleeve 2, the annular space, the pressure ring 14 and closeSeal ring 15 is closely connected to be set on the lateral surface of the central tube 1.When fluid injection is suppressed, by setting the sealing ring 15, it can carrySealing between high central tube 1 and exterior central tube 2, it is to avoid liquid flows through gap leakage between the two into down-hole annular, andThe pressure ring 14 is then used to protect the sealing ring 15, prevents it from being damaged in assembling.
Fig. 1 is referred to, the promotion part 6 includes the support set 61 being from top to bottom sequentially sleeved on the central tube 1And piston 62, the upper end of the support set 61 is connected to the lower end of the expansion inner cylinder 41 and expansion overcoat 42, the socket of its lower endIn the upper end of the piston 62, the lateral surface of the piston 62 and the central tube 1 is mutually closely connected, and the lateral surface of its lower end is verticallyExtension formed ring ear 621 sealing is set on the lateral surface of the lower contact 12, the lower surface of piston 62 with it is described under connectFirst 12 upper surface is adjacent, and the sealing ring cavity 60 being connected with the pressure transmission hole, the piston 62 are formed between the twoThe internal perisporium of lower end is formed with the sealing ring cavity 60 being connected with the pressure transmission hole 101.Wherein, in embodiment illustratedIn, in order to improve hydraulic drive effect, do not limited in the medial surface of the lower end of piston 62 sets chamfering, practical application furtherIn this, such as, also further ring groove etc. can be set directly on the medial surface of the lower end of piston 62, as long as can be preferablyPromote the piston 62 up when meeting fluid injection, therefore, its specific constructive form can be decided according to the actual requirements, and have hereinBody is not construed as limiting.
Wherein, the lateral surface of the lower contact 12 is separately socketed with a shearing ring 16, and the lower end of the ring ear 621 is set in instituteState on shearing ring 16, and be connected by the second shear pin 17 with the shearing ring 16, for the piston 62 initialPositioning during state, when the piston 62 is acted on by hydraulic coupling, can cut second shear pin 17 and up.
To improve sealing property, the lateral surface of the lower contact 12 is at the position, Yi Jisuo being in contact with the ring ear 621The medial surface for stating piston 62 is embedded with seal washer (not shown) respectively.Wherein, preferably compound action layering vapour drives envelopeIt is 152mm (such as at the top connection, shearing ring) every the external diameter of device, its internal diameter is 62mm, such as in central tube, lower contactPlace.
Fig. 1 is referred to, the compound action layering vapour that the present invention is provided drives packer, is connected with other process pipe strings and tripping inBehind underground, its specific work process is as follows：
First, by well head fluid injection into central tube 1, liquid stream enters in the sealing ring cavity 60 from the pressure transmission hole 101,Under the promotion of hydraulic coupling, the piston 62 drives support set 61 up, and promotes expansion inner cylinder 41 and the expansion of dilation 4Overcoat 42 is moved up, then is compressed by cartridge 32 described in the expansion upward pushing tow of overcoat 42, the cartridge 32 is existedUnderground completes tentatively to set, wherein, utilize the mutual clip of the lock sleeve 51 and retaining ring 52, it is to avoid the dilation4 move down under the propulsive thrust effect of cartridge 32, so that setting reliable；
Then, steam injection operation is carried out to underground, temperature in wellbore can gradually rise, and now, the sealing is poured into advanceInflation fluid in chamber H can be vaporized, swollen after vaporization because expansion inner cylinder 41 is locked on lock sleeve 51 by retaining ring 53Swollen liquid can promote the expansion overcoat 42 to move up, and further compression seal packing element 32 realizes that compensation is setting.
After the completion of underground work, stop to underground steam injection, with the reduction of downhole temperature, after the inflation fluid heat release of vaporizationLiquid is re-converted into, so as to eliminate to the expansion thrust of overcoat 42 so that expansion overcoat 42 is fitted in the presence of cartridge 32When moving down, the cartridge 32 is returned in underground initial preliminary sets state；Then, in being made by above putting on joint 11Heart pipe 1 is up, and because cartridge 32 is tightly squeezed on the inwall of down-hole casing, each part is relatively motionless, and described firstShear pin 13 is then cut；Central tube 1 is carried in continuation, when the groove 102 is moved to 52 bottom of closing piece, the lockBlock 52 departs from the neck 511 of the lock sleeve 51 and fallen into the groove 102, makes the lock sleeve 51 and the exterior central tube 3Between release and be mutually located state, now, in the presence of the back stretch of cartridge 32, expansion overcoat 42, swollen can be promotedSwollen inner cylinder 41 and lock sleeve 51 are overall to be moved down, and it is original state to reply, so as to release the state that sets with down-hole casing, mostAfterwards, the present invention is taken out from underground.
Schematical embodiment of the invention is the foregoing is only, the scope of the present invention is not limited to.It is anyThose skilled in the art, the equivalent variations made on the premise of the design of the present invention and principle is not departed from and modification, all shouldBelong to the scope of protection of the invention.