US20200149369A1 - Downhole tool having a shock-absorbing sleeve - Google Patents
Downhole tool having a shock-absorbing sleeve Download PDFInfo
- Publication number
- US20200149369A1 US20200149369A1 US16/745,199 US202016745199A US2020149369A1 US 20200149369 A1 US20200149369 A1 US 20200149369A1 US 202016745199 A US202016745199 A US 202016745199A US 2020149369 A1 US2020149369 A1 US 2020149369A1
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- US
- United States
- Prior art keywords
- sleeve
- chamber
- housing
- fluid
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 claims abstract description 90
- 230000004888 barrier function Effects 0.000 claims abstract description 72
- 238000000034 method Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 239000004519 grease Substances 0.000 claims description 8
- 238000013270 controlled release Methods 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 abstract description 7
- 230000036961 partial effect Effects 0.000 description 10
- 230000035939 shock Effects 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 5
- 230000000254 damaging effect Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011067 equilibration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
-
- E21B2034/007—
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
Definitions
- Embodiments herein are related to a shock-absorbed sleeve in downhole tool deployed in a wellbore, and more particularly to apparatus and method of absorbing or dampening damaging effects resulting from the actuation of a shifting sleeve during downhole operations.
- Shifting sleeves are incorporated into tubulars, such as casing and completion strings. Generally the sleeves are fit to a tool for selectively opening ports through the casing during wellbore completion operations.
- completion tools including a shifting tool, are run into the wellbore and located at the sleeve.
- the shifting tools engaged the sleeve and an axial actuating force is applied to the sleeve to shift the sleeve.
- the sleeve is initially restrained to the casing using shear screws.
- the actuating force overcomes the shear screws and is released to move downhole, shifting the sleeve to the actuated position.
- the movement of the sleeve is arrested by a mechanical stop between the sleeve and the casing.
- a conventional prior art, resettable sealing device 10 is shown with an anchor comprising button-type slip inserts 12 .
- the resettable sealing device 10 was positioned in a prior art sleeve 14 fit to a prior art sleeve sub, which was in turn incorporated in a casing.
- Other types of slips 13 having alternate forms of slip inserts or wickers formed thereon were also tested.
- the resettable sealing device 10 was anchored within the sleeve and accelerometers were positioned on casing for detecting the shock resulting from the shifting of the sleeve.
- the resettable sealing device 10 was actuated by the cone 15 driving slips 13 outwardly to engage inserts 12 onto the sleeve 14 .
- Pressure at the resettable sealing device was increased to impart an actuating force on the sleeve, shearing shear screws, and shifting the sleeve to an actuated position.
- the movement of the sleeve was arrested against a stop shoulder in the sleeve sub.
- a downhole apparatus comprising: a tubular housing along a tubing string; a sleeve located within the housing and axially moveable therein from a first position to a second position; and a first annular chamber radially intermediate the housing and the sleeve, said first annular chamber containing a first dampening fluid and being capable of controllably releasing the first dampening fluid under pressure; wherein when the sleeve moves from the first position to the second position, the first dampening fluid is pressurized and controllably released for controlling the speed of the sleeve movement.
- the first dampening fluid is a substantially incompressible fluid such as grease.
- the first dampened fluid has a viscosity index in the range between 80 and 110. In some embodiments, the first dampened fluid has a viscosity index of 90.
- the downhole apparatus may further comprise a second annular chamber radially intermediate the housing and the sleeve, and axially immediately adjacent the first annular chamber; wherein the second annular chamber is in fluid communication with the first chamber for receiving the first dampening fluid released from the first chamber.
- the second chamber may contain a second dampening fluid.
- the first and second dampening fluid may be the same fluid, or alternatively may be different fluids.
- the first and second chambers are formed from an annular space radially intermediate the housing and the sleeve.
- An annular barrier divides the annular space into the first and second chambers.
- the annular space is located at a fixed location with respect to the housing, and the annular barrier is fixed to the sleeve and moveable therewith, the movement of the annular barrier simultaneously reducing the volume of the first chamber and enlarging the volume of the second chamber.
- the barrier comprises a seal arrangement for sealing between the sleeve and the housing.
- the barrier is threadably engaged along the sleeve.
- the annular space is located at a fixed location with respect to the sleeve and moveable therewith, and the annular barrier is located at a fixed location with respect to the housing, the movement of the annular barrier simultaneously reducing the volume of the first chamber and enlarging the volume of the second chamber.
- the downhole apparatus further comprises at least one metering passage fluidly connecting the first and second chambers across the barrier.
- the at least one metering passage may extend axially through the interface of the sleeve and the barrier on both sides thereof or on either side thereof. Alternatively, the at least one metering passage may extend axially through the barrier.
- the sleeve comprises exterior threads and the barrier comprises internal threads, the sleeve's exterior threads being circumferentially discontinuous forming at least one axial metering passage fluidly connecting the first and second chambers across the barrier.
- the barrier's internal threads may also be circumferentially discontinuous forming at least one axial metering passage fluidly connecting the first and second chambers across the barrier. Therefore, the at least one metering passage may be formed by the discontinuity of the sleeve's exterior threads, the discontinuity of the barrier's internal threads, or both.
- the housing comprises a shoulder for receiving an annular end surface of the sleeve when the sleeve is at the second position, wherein the annular end surface of the sleeve extends axially outwardly with a predefined angle from an inner edge thereof to an outer edge thereof, and wherein the shoulder of the housing extends axially inwardly with the predefined angle from an inner edge thereof to an outer edge thereof.
- a method of moving a sleeve in a housing axially from a first position to a second position, said housing being used in a tubing string comprising: providing a first annular chamber radially intermediate the housing and the sleeve; enclosing a first dampening fluid in the first chamber; moving the sleeve from the first position to the second position; and, during the movement of the sleeve, pressurizing the first dampening fluid in the first chamber, and controllably releasing the pressurized first dampening fluid out of the first chamber for controlling the speed of the sleeve.
- the method further comprises providing a second annular chamber radially intermediate the housing and the sleeve, and axially immediately adjacent the first annular chamber, wherein the second annular chamber is in fluid communication with the first chamber; and receiving, in the second chamber, controlled release of fluid out of the first chamber during the movement of the sleeve.
- a method of moving a sleeve in a housing axially from a first position to a second position, said housing being used in a tubing string comprising: providing a closed annular space radially intermediate the housing and the sleeve; dividing the annular space into a first and a second chambers in fluid communication; enclosing incompressible fluid in the first and second chambers; moving the sleeve from the first position to the second position; and, during the movement of the sleeve, simultaneously reducing the volume of the first chamber and increasing the volume of the second chamber to pressurize the fluid in the first chamber and force the fluid in the first chamber to controllably flow into the second chamber for dampening the sleeve's movement.
- FIGS. 1A and 1B show a partial side view of a prior art resettable sealing device for a sleeve shifting tool, the device having slip inserts for engaging an inside surface of the sleeve;
- FIGS. 2 and 3 shows representations of photographic evidence of damage to an inside wall of a prior art sleeve caused in a test actuation using slip inserts according to FIGS. 1A and 1B , FIG. 2 illustrating a cross-section of a sleeve showing pairs of slip scoring and FIG. 3 showing a closed up cross-section of the sleeve wall of FIG. 2 having a piled-up landing area of one insert;
- FIG. 4A is a cross-sectional view of a ported-form of sleeve sub having an axially moveable sleeve shown in the initial uphole or port-closed position, according to an embodiment disclosed herein;
- FIG. 4B is a cross-sectional view of the ported sleeve sub of FIG. 4A , wherein the sleeve is in actuated downhole or port-open position;
- FIG. 5A illustrates more detailed partial sectional views of an uphole port end and downhole stop end of the sleeve sub of FIG. 4A with the sleeve in the closed position;
- FIG. 5B illustrates more detailed partial sectional views of the port end and stop end of the sleeve sub of FIG. 5A with the sleeve in the open position;
- FIG. 6 is a side view of the sleeve sub of FIG. 4A , the housing having been omitted for clarity and illustrating a seal arrangement and metering passages formed about an external surface of the sleeve;
- FIGS. 7A and 7B are partial views of the seal arrangement and metering passages of FIG. 6 , wherein in
- FIG. 7A the sleeve is shown in the uphole closed position, the downhole end spaced from the housing stop, and
- FIG. 7B the sleeve is shown in the downhole open position, the downhole end engaging the housing stop
- FIG. 8 illustrates one embodiment of the seal arrangement on the sleeve, a barrier ring threadably installed to the sleeve and a plurality of metering passages formed at least axially through the threads, the metering passages permitting fluid to extrude past the barrier ring during shifting of the sleeve and acting to slow the sleeve;
- FIGS. 9A and 9B are partial side view and end cross-sectional views of the sleeve of FIG. 8 along sections A-A and B-B, respectively, the seal and retaining ring having been removed for clarity, the sleeve having at least one metering passage formed axially along an outside surface thereof;
- FIGS. 9C and 9D are side and end cross-sectional views of the barrier ring of FIG. 8 taken along sections A-A and B-B, respectively, the sleeve having been omitted for clarity, the ring also having at least one metering passage formed axially along and inside surface thereof;
- FIG. 9E is an end cross-sectional view of the sleeve and seal arrangement illustrating rotational alignment of the respective outside and inside surface metering passages for increased flow metering capacity
- FIG. 10A illustrates a partial sectional view of the downhole stop end of the sleeve sub of FIG. 4A with the sleeve in the closed position;
- FIG. 10B shows an enlarged view of area El of FIG. 10A ;
- FIG. 10C illustrates a partial sectional view of the downhole stop end of the sleeve sub of FIG. 4A with the sleeve in the open position;
- FIG. 10D shows an enlarged view of area E 3 of FIG. 10C ;
- FIG. 10E shows an enlarged view of area E 2 of FIG. 10A ;
- FIG. 11 shows a partial sectional view of the downhole stop end of the sleeve sub and a shifting tool received therein, according to an alternative embodiment
- FIGS. 12A to 12D are end cross-sectional views of alternative embodiments of the sleeve and seal arrangement, wherein
- FIG. 12A having misaligned sleeve and ring metering passages
- FIG. 12B having metering passages formed only in the sleeve
- FIG. 12C having metering passages formed along the inside surface of the barrier ring
- FIG. 12D having metering passages formed through the body of the ring
- FIG. 13A illustrates a partial sectional view of the downhole stop end of the sleeve sub having one or more metering passage through the housing, according to an alternative embodiment
- FIG. 13B illustrates a partial sectional view of the downhole stop end of the sleeve sub having one or more metering passage through the sleeve, according to another embodiment.
- a sleeve sub 102 having a shifting or sliding sleeve 114 and a closed or sealed annular space filled with substantially incompressible dampening fluid such as grease.
- a shock absorbing barrier ring 122 divides the annular space into at least a first and a second chambers 126 and 128 in fluid communication via one or more metering passages.
- the volume of the first chamber 126 is reduced and that of the second chamber 128 is increased, pressurizing the fluid in the first chamber 126 and forcing it to flow into the second chamber via the metering passages in a controlled manner.
- the pressurization of the fluid in the first chamber 126 and the controllable release of the fluid out of the first chamber 126 absorbs the momentum of the moving sleeve 114 and controls the speed of the sleeve movement.
- the arresting action caused by stopping of the sleeve is reduced.
- a plurality of sleeve subs 102 are typically spaced along a casing or completion string to access various locations along a wellbore. One or more of the sleeve subs 102 are actuated for various operations.
- each sleeve sub 102 comprises a cylindrical, tubular housing 108 .
- An uphole and a downhole tubular collar 108 A and 108 B are threaded into the uphole and downhole ends of the housing 108 , respectively, for connection inline within the completion string (not shown).
- the uphole and downhole tubular collar 108 A and 1086 have an inner diameter smaller than the inner diameter of the housing 108 .
- the downhole collar 108 B comprises a shoulder or sleeve stop 112 for delimiting the downhole movement of the sleeve 114 .
- the shifting sleeve 114 is a cylindrical tubular received within the housing 108 and axially moveable therewithin during operation between a first, uphole and a second, downhole position.
- the shifting sleeve 114 has an outer diameter generally the same as or slightly smaller than the uphole and downhole collar 108 A and 108 B such that the uphole and downhole ends 116 and 118 of the shifting sleeve 114 are slidably received in the uphole and downhole collar 108 A and 108 B, respectively, and axially moveable therewith.
- the sleeve 114 is retained concentrically within housing 108 and guided during axial movement by the uphole and downhole collars 108 A and 108 B.
- sleeve sub can have various functions, typically a sleeve sub 102 is ported and the sleeve 114 is actuated to open or close ports to control communication from a bore of the completion string to the wellbore without and the formation therebeyond.
- the sleeve sub 102 further comprises one or more ports 110 formed through the uphole collar 108 A. Movement of the sleeve's uphole end 116 alternately uncovers or blocks the ports 110 to open or close the ports 110 respectively. As shown in FIGS. 4A and 5A , in the closed position, which is the port-closed uphole position in the context of a ported sub, the uphole end 116 of the sleeve 114 blocks the ports 110 .
- the outer diameter of the sleeve 114 is smaller than the inner diameter of the housing 114 , forming an annular space or tool annulus 120 along an intermediate portion of, and between, the housing 108 and sleeve 114 .
- the tool annulus 120 is located radially between the housing 108 and the sleeve 114 and extends axially from a downhole edge of the uphole collar 108 A to an uphole edge of the downhole collar 108 B.
- the tool annulus 120 is an enclosed space with a fixed volume formed at a fixed location with respect to the housing 108 regardless whether the sleeve 114 is at the closed position or at the open position.
- the tool annulus 120 is sealed between its uphole end 120 A and its downhole end 120 B, e.g., by suitable seals such as o-rings 121 between the sleeve's and housing's uphole ends 116 and 108 A, and between the sleeve's and housing's downhole ends 118 and 1086 .
- suitable seals such as o-rings 121 between the sleeve's and housing's uphole ends 116 and 108 A, and between the sleeve's and housing's downhole ends 118 and 1086 .
- the shifting sleeve 114 further comprises a circumferential barrier ring 122 coupled thereto for axial movement therewith and slidably sealable against the housing 108 .
- the barrier ring 122 divides the tool annulus 120 into first and second chambers.
- the first chamber is a downhole chamber 126 located downhole of the barrier ring 122 , between the barrier ring 122 and the downhole end 120 B of the annulus 120 .
- the second chamber is an uphole chamber 128 located uphole of the barrier ring 122 , between the barrier ring 122 and the uphole end 120 A of the annulus 120 .
- the barrier ring 122 is fixed to the sleeve 114 at an axial position closer to the downhole end 118 . Accordingly the first chamber 126 has a volume smaller than that of the second chamber 128 .
- the first and second chambers 126 and 128 are substantially filled with dampening fluid F such as a grease.
- the dampening fluid F has high viscosity and has a high melting temperature, e.g., 200° C., such that it remains “solid” in typical downhole environment.
- the dampening fluid F preferably has a viscosity index between 80 and 110 .
- the dampening fluid F is the OG-HTM Open Gera Lubricant with viscosity index of 90, manufactured by Jet-Lube of Edmonton, Alberta, Canada.
- one or more metering passages are formed across the barrier ring 122 to fluidly connect the first and second chambers 126 and 128 .
- the metering passages have restricted cross-section to control the rate of the dampening fluid flowing therethrough and thus control the movement of the sleeve.
- the barrier ring 122 moves therewith, acting as a piston and attempting to reduce the volume of the first chamber 126 from a first or initial volume when the sleeve 114 is in the uphole position to a smaller actuated volume, pressurizing the grease therein.
- the sleeve 114 is moved downhole from the first position shown in FIG. 4A to the second position shown in FIG. 4B to open the ports 110 .
- the axial ends 120 A and 120 B of the annulus 120 are fixed with respect to the housing 108 , the position and the volume of the entire annulus 120 , i.e., the union of the first and second first chambers 126 and 128 , is unchanged.
- the volume of the first chamber 126 between the barrier ring 122 and the annulus downhole end 120 B is reduced while the volume of the second chamber 128 between the annulus uphole end 120 A and the barrier ring 122 is simultaneously increased.
- the second chamber 128 is then capable of receiving the displaced dampening fluid F from the first chamber 126 .
- the pressurization of the dampening fluid F in the first chamber 126 hydraulically arrests the movement of the sleeve 114 and dampens any shock caused when the sleeve 114 is stopped by the shoulder 112 .
- the metering passages connecting the first and second chambers 126 and 128 meters the dampening fluid F out of the first chamber 126 into the second chamber 128 , allowing the volume of the first chamber 126 to reduce such that the sleeve 114 can move to the downhole open position.
- the overall fluid flow capacity of the metering passages, the volume of at least the first chamber 126 and the flow characteristics of the dampening fluid F such as a viscosity of the fluid relative to wellbore temperature determine the sleeve movement and shock absorption.
- the dampening occurs as the fluid is pressurized and caused to extrude past the barrier ring 122 via the metering passages 144 from the first chamber 126 to the second chamber 128 .
- the barrier ring 122 provides a circumferential seal arrangement 142 threadably coupled onto a plurality of threads 140 on the outer surface of the sleeve 114 for sealing between the sleeve 114 and the housing 108 .
- a plurality of metering passages 144 are provided for fluidly connecting the first and second chambers 126 and 128 .
- the metering passages 144 provides fluid passages past the barrier ring 122 .
- the metering passages 144 includes passages through the interface of the sleeve and the barrier ring, wherein the passages are on both sides of the sleeve/barrier ring interface.
- an exterior portion of the shifting sleeve 114 is machined to a smaller diameter including a plurality of upstanding external threads 140 .
- a plurality of spaced grooves 144 A are formed on the outer surface of the sleeve extending generally axially through the threads 140 . Accordingly, the external threads 140 are circumferentially discontinuous, interrupted circumferentially by the spaced grooves 144 A.
- the seal arrangement 142 comprises a retaining ring 146 and an annular seal 148 extending circumferentially about an outer surface of the retaining ring 146 .
- the retaining ring 146 has an annular groove 150 thereabout for receiving the seal 148 .
- the seal 148 provides sufficient displacement to maintain a seal to the housing 108 despite normal variances in manufacturing tolerances.
- a plurality of threads 152 are machined on the inner surface of the retaining ring 146 for threading the retaining ring 146 onto the threads 140 on the sleeve 114 .
- the internal threads are also formed with axially-aligned, circumferentially periodic discontinuities for forming additional and generally axially-extending grooves 144 B.
- the number and locations of the grooves 144 B on the inner surface of the retaining ring 146 match those of the grooves 144 A on the outer surface of the sleeve 114 .
- the retaining ring 146 further comprises a one or more set screw holes 154 extending radially therethrough for releasable engagement with the sleeve, a set screw engaged with hole 154 , locking the rotational position thereof when the retaining ring 146 is threaded onto the sleeve 114 .
- set screw is coupled to sleeve 114 , along the set screw hole 154 , with one of the axially-extending grooves 144 A so as to align each groove 144 A on the outer surface of the sleeve 114 with a corresponding groove 1446 on the inner surface of the retaining ring 146 , each pair of grooves 114 A and corresponding grooves 114 B forming one of the plurality of metered passages 144 that fluidly connecting the first and second chambers 126 and 128 .
- the size and number of the metered passages 144 are chosen such that the fluid in the first chamber 126 , when pressurized, flows to the first chamber 126 at a metered and limited streamflow rate.
- the second chamber 128 further comprises an open port 124 adjacent to its uphole end, opposite to the barrier ring 122 .
- a breakdown of cement in an annulus between the sleeve sub and the casing and about the ports, as the sleeve rapidly shifts past the ports, is desirable and can be determined as a weight drop at surface, however in embodiments disclosed herein the rapid breakdown is balanced with the dampening of the sleeve speed.
- the sleeve 114 also comprises an angled end surface for further reducing damages that may be caused by the impact of stopping the sleeve 114 on the shoulder 112 .
- the downhole end surface 172 of the sleeve 114 extends from the annular inner edge 174 axially outwardly to the annular outer edge 176 with an acute angle ⁇ .
- the shoulder 112 is also machined to form an angled annular surface 178 corresponding to the angled downhole end surface 172 of the sleeve 114 , i.e., the annular surface 178 extending from its annular inner edge 180 axially inwardly to its outer edge 182 with an acute angle ⁇ .
- the sleeve sub 102 also comprises a restraining mechanism.
- the sleeve 114 further comprises an annular tab 182 extruding radially outwardly from the outer surface of the sleeve 114 axially at a location adjacent the downhole end with a distance D therefrom.
- the downhole collar 108 B also comprises one or more annular serrated grippers 184 in the form of one or more grooves on the inner surface thereof at a location with a distance D from the shoulder 112 .
- the momentum of the sleeve 114 forces the tab 182 to engage one of the serrated grippers 184 to restrain the sleeve 114 at the second position.
- the restraint can be overcome with a suitably forceful actuation.
- the first chamber 126 has a length of about 6 inches and an annular thickness of about 0.2 inch.
- the second chamber has a length of about 24 inches and an annular thickness of about 0.18 inch.
- Each of the passages 144 A shown in FIGS. 9A and 9B has a width of about 0.3 inch and a depth of about 0.03 inch.
- Each of the passages 144 B shown in FIGS. 9C and 9D has a width of about 0.26 inch and a maximum depth of 0.04 inch.
- the sleeve 114 may actuated by various means, and may be actuated to move downhole, uphole or in both directions.
- the sleeve 114 further comprises one or more annular gripping grooves 202 spaced axially on its inner surface at an axial location uphole of and adjacent the downhole end 118 of the sleeve.
- a shifting tool 204 in the form of a tubular having an outer diameter generally equal to or slightly smaller than the inner diameter of the sleeve 114 comprises a plurality of keys 206 correspondingly spaced on its outer surface adjacent the downhole end 208 at locations corresponding to the gripping grooves 202 .
- the shifting tool 204 is first inserted into the sleeve 114 and positioned at a predefined location such that the keys 206 on the shifting tool 204 are aligned to respective gripping grooves 202 on the sleeve 114 . Then, the keys 206 are forced out to axially engage the gripping grooves 202 to hold the sleeve 114 . Alternatively, the keys 206 are biased or otherwise actuated to engage the gripping grooves 202 . Another force such as a hydraulic force is applied to move the shifting tool 204 and the sleeve 114 downhole towards the second position. Those skilled in the art appreciate that a force may alternatively be applied to move the shifting tool 204 and the sleeve 114 uphole from a downhole position.
- the sleeve 114 does not comprise gripping grooves. Rather, the annular end surface 172 is configured to be engaged by the keys 206 , such as to be radially “thicker” than that of the annular surface 178 of the shoulder 112 , such that, when the annular end surface 172 rests against the shoulder surface 178 , a radially inner portion of the end surface 172 is exposed out of the shoulder surface 178 .
- a shifting tool 204 comprising a plurality of keys 206 annually distributed on its outer surface adjacent the downhole end 208 is first inserted into the sleeve 114 and positioned such that the keys 206 on the shifting tool 204 are downhole to the sleeve's end surface 172 . Then, the keys 206 are forced out to axially engage the portion of the end surface 172 that is exposed out of the shoulder 112 . Another force such as a hydraulic force is applied to move the shifting tool 204 and the sleeve 114 uphole. In this embodiment, the shifting tool 204 can only “pull back” the sleeve uphole from a downhole position to an uphole position.
- the sleeve 114 comprises a plurality gripping grooves adjacent the uphole end 116 .
- a shifting tool 204 comprises a plurality of keys 206 for axially engaging the gripping grooves adjacent the uphole end 116 to move the sleeve 114 uphole or downhole in a manner similar as described above.
- the housing 108 comprises an uphole shoulder at its uphole end with an annular surface radially “thinner” that the uphole end surface of the sleeve such that a radially inner portion of the sleeve's uphole end surface may be exposed out of the housing's uphole shoulder surface when the sleeve is at an uphole position.
- a shifting tool comprising a plurality of keys annually distributed on its outer surface adjacent its uphole end is first inserted into the sleeve 114 and positioned such that the keys 206 on the shifting tool 204 are uphole to the sleeve's uphole end surface. Then, the keys are forced out to axially engage the portion of the uphole end surface that is exposed out of the housing's uphole shoulder. Another force such as a hydraulic force is applied to move the shifting tool and the sleeve downhole. In this embodiment, the shifting tool 204 can only “push” the sleeve uphole from an uphole position to a downhole position.
- the uphole end 116 of the sleeve 114 comprises one or more ports (not shown) corresponding to ports 110 on the uphole collar 108 A.
- the uphole end 116 of the sleeve 114 blocks the ports 110 .
- the ports on the uphole end of the sleeve 114 is aligned with respective ports 110 on the uphole collar 108 A, opening the ports and establishing fluid communication between the inside and outside of the housing 108 .
- FIGS. 12A to 12D show some examples.
- the seal arrangement 142 is set to an angular position that the passages 144 B on its inner surface are not aligned with the passages 144 A on the outer surface of the sleeve 114 .
- the metering passages 144 for fluidly connecting the first and second chambers 126 and 128 include the passages 144 A on the sleeve side of the interface between the sleeve 114 and the barrier 122 (or more specifically the seal arrangement 142 ), and passages 144 B on the barrier side of the interface between the sleeve 114 and the barrier 122 .
- the sleeve 114 is profiled to have the passages 144 A as described above.
- the internal threads 152 on the inner surface of the seal arrangement 142 are circumferentially continuous, i.e., the seal arrangement 142 does not comprise any passages.
- the metering passages 144 for fluidly connecting the first and second chambers 126 and 128 only include the passages 144 A on the sleeve side of the interface between the sleeve 114 and the barrier 122 .
- the seal arrangement 142 is profiled to have the passages 144 B as described above, but the sleeve 114 does not comprise any passages.
- the metering passages 144 for fluidly connecting the first and second chambers only include the passages 144 B on the barrier side of the interface between the sleeve 114 and the barrier 122 .
- the metering passages 144 are formed as passages extending through the body of the seal arrangement 142 .
- a plurality of metering passages 144 are formed generally axially across the seal arrangement 142 .
- the shifting sleeve 114 may comprise only one metering passage 144 generally axially across the barrier ring 122 .
- the uphole movement can be similarly dampened as the dampening fluid F is metered back through the metering passages 144 from the second chamber 128 to the first chamber 126 .
- the second chamber 128 does not comprise the open port 124 .
- the second chamber 128 can be substantially filled with a second dampening fluid such as a second type of grease.
- a second dampening fluid such as a second type of grease.
- the above embodiments allow one to manufacture the sleeve sub 102 using off-the-shelf products that may have loose tolerance.
- the seal 148 added to the barrier ring 122 is such an accommodation. In situations that one may control the components of the sleeve subs 102 to achieve fine tolerance as required, some alternative embodiments described below may be used.
- the uphole and downhole ends 120 A and 120 B of the annulus 120 are formed by an upset in diameter of respective housings' ends 108 A, 108 B, decreasing in diameter from the housing 108 to seal surfaces, corresponding to the seal surfaces of the sleeve's ends 116 , 118 .
- the annulus uphole end 120 A is sufficiently spaced downhole from the ports 110 such that the sleeve's uphole end 116 remains sealed to the housings uphole end 108 A in the downhole closed position.
- the annulus 120 can be sealed axially at its uphole and downhole ends and fixed with respect to the sleeve 114 .
- the barrier ring 122 is coupled to the inner surface of the housing 108 at a location fixed therebetween.
- the barrier ring 122 is in sealable contact with the outer surface of the sleeve 114 , and divides the annulus 120 into a first chamber uphole to the barrier ring 122 and a second chamber downhole thereto.
- one or more metering passages are formed in or under the barrier ring 122 for fluidly connecting the first and second chambers. A first type dampening fluid is enclosed in the first chamber and a second type fluid is dampening enclosed in the second chamber.
- the first chamber is then pressurized causing the fluid therein to flow into the second chamber through metering passages across the barrier ring 122 .
- the pressurization of the fluid in the first chamber dampens the impact to the sleeve 114 .
- the annulus 120 may be divided by a plurality of barriers into more than two chambers. One or more metering passages are formed across each barrier such that the chambers are fluidly connected.
- the chambers may be substantively filled with the same type or different types of dampening fluid such as grease.
- the annulus 120 is a contiguous space, i.e., not divided.
- the downhole end 120 B is sealably coupled to the housing 108 and the uphole end 120 A is sealably coupled to the sleeve 144 .
- the annulus space 120 is filled with a compressible fluid such as Nitrogen.
- a compressible fluid such as Nitrogen.
- the seal arrangement 142 is threaded to a plurality of threads on the outer surface of the sleeve 114
- the seal arrangement 142 is fixed to the sleeve 114 using other suitable means such as welding, glue or other suitable fasteners.
- the metering passages across the barrier ring 122 may be within the seal arrangement 142 .
- one or more barrier rings 122 are used for sealably dividing the annulus 120 into two or more chambers
- the barrier rings 122 divide the annulus 120 into chambers in an unsealed manner and leave an annular gap for fluidly connecting the chambers.
- the gap may be carefully designed to achieve desired fluid flow capacity for controlling shock absorption.
- the sleeve sub 102 does not comprise any passage across the barrier ring 122 . Rather, one or more metering passages 222 are formed through the housing 108 at a location or locations corresponding to the first chamber 224 for controllably releasing the dampening fluid F out of the first chamber 224 into the exterior of the sleeve sub 102 when the volume of the first chamber 224 is reduced during the movement of the sleeve.
- the sleeve sub 102 does not comprise any passage across the barrier ring 122 . Rather, one or more metering passages 226 are formed through the sleeve 114 at a location or locations corresponding to the first chamber 228 for controllably releasing the dampening fluid F out of the first chamber 228 into the interior of the sleeve 114 when the volume of the first chamber 228 is reduced during the movement of the sleeve.
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Abstract
An apparatus having a shock-absorbing sleeve is disclosed. The apparatus comprises a housing, an axially moveable sleeve received in the housing and a sealed annular space having a fixed volume axially between the housing and the sleeve. A barrier axially moveable with the sleeve divides the annular space into a first and a second chambers. The first and second chambers are filled with uncompressible dampening fluid. One or more metering passages across the barrier fluidly connect the first and chambers. During the axial movement of the sleeve, the volume of the first chamber is reduced and that of the second chamber is increased, forcing the fluid in the first chamber to flow into the second chamber in a controlled manner to dampen the movement of the sleeve.
Description
- Embodiments herein are related to a shock-absorbed sleeve in downhole tool deployed in a wellbore, and more particularly to apparatus and method of absorbing or dampening damaging effects resulting from the actuation of a shifting sleeve during downhole operations.
- Shifting sleeves are incorporated into tubulars, such as casing and completion strings. Generally the sleeves are fit to a tool for selectively opening ports through the casing during wellbore completion operations. Typically completion tools, including a shifting tool, are run into the wellbore and located at the sleeve. The shifting tools engaged the sleeve and an axial actuating force is applied to the sleeve to shift the sleeve. The sleeve is initially restrained to the casing using shear screws. The actuating force overcomes the shear screws and is released to move downhole, shifting the sleeve to the actuated position. The movement of the sleeve is arrested by a mechanical stop between the sleeve and the casing.
- The initiation and arresting of the movement of sleeve create sufficient forces to damage the sleeve, the shifting tool, and even the cased wellbore environment. It has been observed that the impact force as the sleeve reaches the stop is sufficient to cause a variety of damage. For example, where the shifting tool engages the sleeve using anchors, slips having teeth, wickers or the like thereon, can significantly damage the inside surface of the sleeve when subjected to such actuation forces. When the sleeve suddenly stops, the inertia in the moving components, such as the shifting tool and supporting string, results in large forces at the slip/sleeve interface. Damage results, detrimental to the integrity of the related components and environment including the sleeve, the shifting tool, the downhole tool incorporating the sleeve and the near wellbore.
- With reference to
FIGS. 1A and 1B , a conventional prior art,resettable sealing device 10 is shown with an anchor comprising button-type slip inserts 12. Theresettable sealing device 10 was positioned in aprior art sleeve 14 fit to a prior art sleeve sub, which was in turn incorporated in a casing. Other types of slips 13 having alternate forms of slip inserts or wickers formed thereon were also tested. To test the energy of sleeve actuation, theresettable sealing device 10 was anchored within the sleeve and accelerometers were positioned on casing for detecting the shock resulting from the shifting of the sleeve. Theresettable sealing device 10 was actuated by thecone 15 driving slips 13 outwardly to engageinserts 12 onto thesleeve 14. Pressure at the resettable sealing device was increased to impart an actuating force on the sleeve, shearing shear screws, and shifting the sleeve to an actuated position. The movement of the sleeve was arrested against a stop shoulder in the sleeve sub. - As shown in the diagrammatic representation of actual photographs set forth in
FIGS. 2 and 3 , the sudden stop of the sleeve anddevice 10 resulted in significant loads therebetween. As shown, the forces caused theinserts 12 to bite further into the inner surface of the sleeve, leaving crescentshaped cuts 18 in the inner wall of thesleeve 14. Subsequent sleeve re-engagement is compromised. Further, the high impact to the sleeve also caused failure of the anchor in some tests including to the slips and slips retaining structure. - Some prior art sleeve shifting systems appear to be purposefully designed to create very high arresting forces resulting in positive indications of sleeve actuation that can be verified at surface. Such systems are particularly at risk of damaging the sleeves and completion tools as a result. Further, there are concerns that the shock loading can result in shock damage to the wellbore environment including the zonal isolation cement and even the formation therebeyond.
- Therefore, there is a need for a method for lessening the shock loading during sleeve actuation so as minimize the risk of damaging the downhole apparatus and wellbore during wellbore completion operations.
- According to one aspect of this disclosure, there is provided a downhole apparatus comprising: a tubular housing along a tubing string; a sleeve located within the housing and axially moveable therein from a first position to a second position; and a first annular chamber radially intermediate the housing and the sleeve, said first annular chamber containing a first dampening fluid and being capable of controllably releasing the first dampening fluid under pressure; wherein when the sleeve moves from the first position to the second position, the first dampening fluid is pressurized and controllably released for controlling the speed of the sleeve movement.
- In some embodiments, the first dampening fluid is a substantially incompressible fluid such as grease.
- In some embodiments, the first dampened fluid has a viscosity index in the range between 80 and 110. In some embodiments, the first dampened fluid has a viscosity index of 90.
- In some embodiments, the downhole apparatus may further comprise a second annular chamber radially intermediate the housing and the sleeve, and axially immediately adjacent the first annular chamber; wherein the second annular chamber is in fluid communication with the first chamber for receiving the first dampening fluid released from the first chamber. The second chamber may contain a second dampening fluid. The first and second dampening fluid may be the same fluid, or alternatively may be different fluids.
- In some embodiments, the first and second chambers are formed from an annular space radially intermediate the housing and the sleeve. An annular barrier divides the annular space into the first and second chambers.
- In some embodiments, the annular space is located at a fixed location with respect to the housing, and the annular barrier is fixed to the sleeve and moveable therewith, the movement of the annular barrier simultaneously reducing the volume of the first chamber and enlarging the volume of the second chamber.
- In some embodiments, the barrier comprises a seal arrangement for sealing between the sleeve and the housing.
- In some embodiments, the barrier is threadably engaged along the sleeve.
- In some embodiments, the annular space is located at a fixed location with respect to the sleeve and moveable therewith, and the annular barrier is located at a fixed location with respect to the housing, the movement of the annular barrier simultaneously reducing the volume of the first chamber and enlarging the volume of the second chamber.
- In some embodiments, the downhole apparatus further comprises at least one metering passage fluidly connecting the first and second chambers across the barrier. The at least one metering passage may extend axially through the interface of the sleeve and the barrier on both sides thereof or on either side thereof. Alternatively, the at least one metering passage may extend axially through the barrier.
- In some embodiments, the sleeve comprises exterior threads and the barrier comprises internal threads, the sleeve's exterior threads being circumferentially discontinuous forming at least one axial metering passage fluidly connecting the first and second chambers across the barrier. The barrier's internal threads may also be circumferentially discontinuous forming at least one axial metering passage fluidly connecting the first and second chambers across the barrier. Therefore, the at least one metering passage may be formed by the discontinuity of the sleeve's exterior threads, the discontinuity of the barrier's internal threads, or both.
- In some embodiments, the housing comprises a shoulder for receiving an annular end surface of the sleeve when the sleeve is at the second position, wherein the annular end surface of the sleeve extends axially outwardly with a predefined angle from an inner edge thereof to an outer edge thereof, and wherein the shoulder of the housing extends axially inwardly with the predefined angle from an inner edge thereof to an outer edge thereof.
- According to another aspect of this disclosure, there is provided a method of moving a sleeve in a housing axially from a first position to a second position, said housing being used in a tubing string, said method comprising: providing a first annular chamber radially intermediate the housing and the sleeve; enclosing a first dampening fluid in the first chamber; moving the sleeve from the first position to the second position; and, during the movement of the sleeve, pressurizing the first dampening fluid in the first chamber, and controllably releasing the pressurized first dampening fluid out of the first chamber for controlling the speed of the sleeve.
- In some embodiments, the method further comprises providing a second annular chamber radially intermediate the housing and the sleeve, and axially immediately adjacent the first annular chamber, wherein the second annular chamber is in fluid communication with the first chamber; and receiving, in the second chamber, controlled release of fluid out of the first chamber during the movement of the sleeve.
- According to yet another aspect of this disclosure, there is provided a method of moving a sleeve in a housing axially from a first position to a second position, said housing being used in a tubing string, said method comprising: providing a closed annular space radially intermediate the housing and the sleeve; dividing the annular space into a first and a second chambers in fluid communication; enclosing incompressible fluid in the first and second chambers; moving the sleeve from the first position to the second position; and, during the movement of the sleeve, simultaneously reducing the volume of the first chamber and increasing the volume of the second chamber to pressurize the fluid in the first chamber and force the fluid in the first chamber to controllably flow into the second chamber for dampening the sleeve's movement.
-
FIGS. 1A and 1B show a partial side view of a prior art resettable sealing device for a sleeve shifting tool, the device having slip inserts for engaging an inside surface of the sleeve; -
FIGS. 2 and 3 shows representations of photographic evidence of damage to an inside wall of a prior art sleeve caused in a test actuation using slip inserts according toFIGS. 1A and 1B ,FIG. 2 illustrating a cross-section of a sleeve showing pairs of slip scoring andFIG. 3 showing a closed up cross-section of the sleeve wall ofFIG. 2 having a piled-up landing area of one insert; -
FIG. 4A is a cross-sectional view of a ported-form of sleeve sub having an axially moveable sleeve shown in the initial uphole or port-closed position, according to an embodiment disclosed herein; -
FIG. 4B is a cross-sectional view of the ported sleeve sub ofFIG. 4A , wherein the sleeve is in actuated downhole or port-open position; -
FIG. 5A illustrates more detailed partial sectional views of an uphole port end and downhole stop end of the sleeve sub ofFIG. 4A with the sleeve in the closed position; -
FIG. 5B illustrates more detailed partial sectional views of the port end and stop end of the sleeve sub ofFIG. 5A with the sleeve in the open position; -
FIG. 6 is a side view of the sleeve sub ofFIG. 4A , the housing having been omitted for clarity and illustrating a seal arrangement and metering passages formed about an external surface of the sleeve; -
FIGS. 7A and 7B are partial views of the seal arrangement and metering passages ofFIG. 6 , wherein in -
FIG. 7A the sleeve is shown in the uphole closed position, the downhole end spaced from the housing stop, and -
FIG. 7B the sleeve is shown in the downhole open position, the downhole end engaging the housing stop, -
FIG. 8 illustrates one embodiment of the seal arrangement on the sleeve, a barrier ring threadably installed to the sleeve and a plurality of metering passages formed at least axially through the threads, the metering passages permitting fluid to extrude past the barrier ring during shifting of the sleeve and acting to slow the sleeve; -
FIGS. 9A and 9B are partial side view and end cross-sectional views of the sleeve ofFIG. 8 along sections A-A and B-B, respectively, the seal and retaining ring having been removed for clarity, the sleeve having at least one metering passage formed axially along an outside surface thereof; -
FIGS. 9C and 9D are side and end cross-sectional views of the barrier ring ofFIG. 8 taken along sections A-A and B-B, respectively, the sleeve having been omitted for clarity, the ring also having at least one metering passage formed axially along and inside surface thereof; -
FIG. 9E is an end cross-sectional view of the sleeve and seal arrangement illustrating rotational alignment of the respective outside and inside surface metering passages for increased flow metering capacity; -
FIG. 10A illustrates a partial sectional view of the downhole stop end of the sleeve sub ofFIG. 4A with the sleeve in the closed position; -
FIG. 10B shows an enlarged view of area El ofFIG. 10A ; -
FIG. 10C illustrates a partial sectional view of the downhole stop end of the sleeve sub ofFIG. 4A with the sleeve in the open position; -
FIG. 10D shows an enlarged view of area E3 ofFIG. 10C ; -
FIG. 10E shows an enlarged view of area E2 ofFIG. 10A ; -
FIG. 11 shows a partial sectional view of the downhole stop end of the sleeve sub and a shifting tool received therein, according to an alternative embodiment; -
FIGS. 12A to 12D are end cross-sectional views of alternative embodiments of the sleeve and seal arrangement, wherein -
FIG. 12A having misaligned sleeve and ring metering passages, -
FIG. 12B having metering passages formed only in the sleeve, -
FIG. 12C having metering passages formed along the inside surface of the barrier ring, and -
FIG. 12D having metering passages formed through the body of the ring; -
FIG. 13A illustrates a partial sectional view of the downhole stop end of the sleeve sub having one or more metering passage through the housing, according to an alternative embodiment; and -
FIG. 13B illustrates a partial sectional view of the downhole stop end of the sleeve sub having one or more metering passage through the sleeve, according to another embodiment. - Having reference to one embodiment of a shock-absorbing sleeve shown in
FIGS. 4A to 5B , asleeve sub 102 is provided having a shifting or slidingsleeve 114 and a closed or sealed annular space filled with substantially incompressible dampening fluid such as grease. A shock absorbingbarrier ring 122 divides the annular space into at least a first and asecond chambers sleeve 114 is moving from a first position downhole to a second position, the volume of thefirst chamber 126 is reduced and that of thesecond chamber 128 is increased, pressurizing the fluid in thefirst chamber 126 and forcing it to flow into the second chamber via the metering passages in a controlled manner. The pressurization of the fluid in thefirst chamber 126 and the controllable release of the fluid out of thefirst chamber 126 absorbs the momentum of the movingsleeve 114 and controls the speed of the sleeve movement. The arresting action caused by stopping of the sleeve is reduced. - A plurality of
sleeve subs 102 are typically spaced along a casing or completion string to access various locations along a wellbore. One or more of thesleeve subs 102 are actuated for various operations. - As shown, each
sleeve sub 102 comprises a cylindrical,tubular housing 108. An uphole and a downholetubular collar housing 108, respectively, for connection inline within the completion string (not shown). The uphole and downholetubular collar 108A and 1086 have an inner diameter smaller than the inner diameter of thehousing 108. Thedownhole collar 108B comprises a shoulder or sleeve stop 112 for delimiting the downhole movement of thesleeve 114. - The shifting
sleeve 114 is a cylindrical tubular received within thehousing 108 and axially moveable therewithin during operation between a first, uphole and a second, downhole position. In particular, the shiftingsleeve 114 has an outer diameter generally the same as or slightly smaller than the uphole anddownhole collar downhole ends sleeve 114 are slidably received in the uphole anddownhole collar sleeve 114 is retained concentrically withinhousing 108 and guided during axial movement by the uphole anddownhole collars - While the sleeve sub can have various functions, typically a
sleeve sub 102 is ported and thesleeve 114 is actuated to open or close ports to control communication from a bore of the completion string to the wellbore without and the formation therebeyond. - Accordingly, in this embodiment, the
sleeve sub 102 further comprises one ormore ports 110 formed through theuphole collar 108A. Movement of the sleeve'suphole end 116 alternately uncovers or blocks theports 110 to open or close theports 110 respectively. As shown inFIGS. 4A and 5A , in the closed position, which is the port-closed uphole position in the context of a ported sub, theuphole end 116 of thesleeve 114 blocks theports 110. - As shown in
FIGS. 4B and 5B , when the shiftingsleeve 114 moves axially downhole to the open position, which is the port-open downhole position in the context of a ported sub, theuphole end 116 moves entirely downhole of theports 110 to uncover theports 110, opening the ports and establishing fluid communication between the inside and outside of thehousing 108. - The outer diameter of the
sleeve 114 is smaller than the inner diameter of thehousing 114, forming an annular space ortool annulus 120 along an intermediate portion of, and between, thehousing 108 andsleeve 114. In particular, thetool annulus 120 is located radially between thehousing 108 and thesleeve 114 and extends axially from a downhole edge of theuphole collar 108A to an uphole edge of thedownhole collar 108B. As the uphole anddownhole ends sleeve 114 are moveable within the uphole anddownhole collars tool annulus 120 is an enclosed space with a fixed volume formed at a fixed location with respect to thehousing 108 regardless whether thesleeve 114 is at the closed position or at the open position. - The
tool annulus 120 is sealed between itsuphole end 120A and itsdownhole end 120B, e.g., by suitable seals such as o-rings 121 between the sleeve's and housing's uphole ends 116 and 108A, and between the sleeve's and housing's downhole ends 118 and 1086. - The shifting
sleeve 114 further comprises acircumferential barrier ring 122 coupled thereto for axial movement therewith and slidably sealable against thehousing 108. Thebarrier ring 122 divides thetool annulus 120 into first and second chambers. The first chamber is adownhole chamber 126 located downhole of thebarrier ring 122, between thebarrier ring 122 and thedownhole end 120B of theannulus 120. The second chamber is anuphole chamber 128 located uphole of thebarrier ring 122, between thebarrier ring 122 and theuphole end 120A of theannulus 120. In this embodiment, thebarrier ring 122 is fixed to thesleeve 114 at an axial position closer to thedownhole end 118. Accordingly thefirst chamber 126 has a volume smaller than that of thesecond chamber 128. - The first and
second chambers - As will be described in more detail later, one or more metering passages are formed across the
barrier ring 122 to fluidly connect the first andsecond chambers sleeve 114 moves axially along thehousing 108, e.g., from the uphole closed position (seeFIGS. 4A, 5A ) to the downhole open position (seeFIGS. 4B, 5B ), thebarrier ring 122 moves therewith, acting as a piston and attempting to reduce the volume of thefirst chamber 126 from a first or initial volume when thesleeve 114 is in the uphole position to a smaller actuated volume, pressurizing the grease therein. - Like other liquids, grease is substantially incompressible and when pressurized, retains its volume. Therefore, to enable movement of the
sleeve 114 at all, when pressurized, the dampening fluid F in thefirst chamber 126 is metered through the metering passages to thesecond chamber 128 at a purposefully limited streamflow rate. - During wellbore completion operation, the
sleeve 114 is moved downhole from the first position shown inFIG. 4A to the second position shown inFIG. 4B to open theports 110. As the axial ends 120A and 120B of theannulus 120 are fixed with respect to thehousing 108, the position and the volume of theentire annulus 120, i.e., the union of the first and secondfirst chambers - However, as the
barrier ring 122 is moving downhole with the shiftingsleeve 114, the volume of thefirst chamber 126 between thebarrier ring 122 and the annulusdownhole end 120B is reduced while the volume of thesecond chamber 128 between the annulusuphole end 120A and thebarrier ring 122 is simultaneously increased. Thesecond chamber 128 is then capable of receiving the displaced dampening fluid F from thefirst chamber 126. The pressurization of the dampening fluid F in thefirst chamber 126 hydraulically arrests the movement of thesleeve 114 and dampens any shock caused when thesleeve 114 is stopped by theshoulder 112. The metering passages connecting the first andsecond chambers first chamber 126 into thesecond chamber 128, allowing the volume of thefirst chamber 126 to reduce such that thesleeve 114 can move to the downhole open position. With this design, the speed of the sleeve movement is then controlled, and the stopping of the sleeve at the second position would not cause damaging impact. - The overall fluid flow capacity of the metering passages, the volume of at least the
first chamber 126 and the flow characteristics of the dampening fluid F such as a viscosity of the fluid relative to wellbore temperature determine the sleeve movement and shock absorption. The dampening occurs as the fluid is pressurized and caused to extrude past thebarrier ring 122 via themetering passages 144 from thefirst chamber 126 to thesecond chamber 128. - The details of the
barrier ring 122 and the metering passages are now described. - As shown in
FIGS. 6 to 8 , thebarrier ring 122 provides acircumferential seal arrangement 142 threadably coupled onto a plurality ofthreads 140 on the outer surface of thesleeve 114 for sealing between thesleeve 114 and thehousing 108. A plurality ofmetering passages 144 are provided for fluidly connecting the first andsecond chambers metering passages 144 provides fluid passages past thebarrier ring 122. - In this embodiment, the
metering passages 144 includes passages through the interface of the sleeve and the barrier ring, wherein the passages are on both sides of the sleeve/barrier ring interface. As shown inFIGS. 9A and 9B , an exterior portion of the shiftingsleeve 114, from an axial location corresponding to aboutbarrier ring 122 and extending along thefirst chamber 126, is machined to a smaller diameter including a plurality of upstandingexternal threads 140. - A plurality of spaced
grooves 144A are formed on the outer surface of the sleeve extending generally axially through thethreads 140. Accordingly, theexternal threads 140 are circumferentially discontinuous, interrupted circumferentially by the spacedgrooves 144A. - Referring again to
FIG. 8 theseal arrangement 142 comprises a retainingring 146 and anannular seal 148 extending circumferentially about an outer surface of the retainingring 146. As shown inFIGS. 9C and 9D , the retainingring 146 has anannular groove 150 thereabout for receiving theseal 148. Theseal 148 provides sufficient displacement to maintain a seal to thehousing 108 despite normal variances in manufacturing tolerances. A plurality ofthreads 152 are machined on the inner surface of the retainingring 146 for threading the retainingring 146 onto thethreads 140 on thesleeve 114. - The internal threads are also formed with axially-aligned, circumferentially periodic discontinuities for forming additional and generally axially-extending
grooves 144B. In this embodiment, the number and locations of thegrooves 144B on the inner surface of the retainingring 146 match those of thegrooves 144A on the outer surface of thesleeve 114. The retainingring 146 further comprises a one or more set screw holes 154 extending radially therethrough for releasable engagement with the sleeve, a set screw engaged withhole 154, locking the rotational position thereof when the retainingring 146 is threaded onto thesleeve 114. - As shown in
FIG. 9E , after theinternal threads 152 of theseal arrangement 142 are threaded onto the external threads 140 (not shown therein) of thesleeve 114, set screw is coupled tosleeve 114, along theset screw hole 154, with one of the axially-extendinggrooves 144A so as to align eachgroove 144A on the outer surface of thesleeve 114 with a corresponding groove 1446 on the inner surface of the retainingring 146, each pair of grooves 114A and corresponding grooves 114B forming one of the plurality ofmetered passages 144 that fluidly connecting the first andsecond chambers passages 144 are chosen such that the fluid in thefirst chamber 126, when pressurized, flows to thefirst chamber 126 at a metered and limited streamflow rate. - In this embodiment, for pressure equalization of both chambers during run-in operations, the
second chamber 128 further comprises anopen port 124 adjacent to its uphole end, opposite to thebarrier ring 122. - A breakdown of cement in an annulus between the sleeve sub and the casing and about the ports, as the sleeve rapidly shifts past the ports, is desirable and can be determined as a weight drop at surface, however in embodiments disclosed herein the rapid breakdown is balanced with the dampening of the sleeve speed.
- In this embodiment, the
sleeve 114 also comprises an angled end surface for further reducing damages that may be caused by the impact of stopping thesleeve 114 on theshoulder 112. - As shown in
FIGS. 10A and 10B , thedownhole end surface 172 of thesleeve 114 extends from the annularinner edge 174 axially outwardly to the annularouter edge 176 with an acute angle α. Theshoulder 112 is also machined to form an angledannular surface 178 corresponding to the angleddownhole end surface 172 of thesleeve 114, i.e., theannular surface 178 extending from its annularinner edge 180 axially inwardly to itsouter edge 182 with an acute angle α. - As shown in
FIGS. 10C and 10D , when thesleeve 114 is moved from the closed position downhole to the open position, the angledannular end surface 172 of thesleeve 114 hits and rests against the angledannular surface 178 of theshoulder 112, causing the angledannular surface 178 of theshoulder 112 to apply an radially outward force H to theend surface 172 of thesleeve 114. Such a radially outward force H avoids what could otherwise be a radially inward distortion of the downhole end of thesleeve 114, and damage associated therewith. - The
sleeve sub 102 also comprises a restraining mechanism. Referring toFIGS. 10A and 10C , thesleeve 114 further comprises anannular tab 182 extruding radially outwardly from the outer surface of thesleeve 114 axially at a location adjacent the downhole end with a distance D therefrom. Correspondingly, thedownhole collar 108B also comprises one or more annularserrated grippers 184 in the form of one or more grooves on the inner surface thereof at a location with a distance D from theshoulder 112. - When the
sleeve 114 is moved from the first position downhole to the second position, the momentum of thesleeve 114 forces thetab 182 to engage one of theserrated grippers 184 to restrain thesleeve 114 at the second position. The restraint can be overcome with a suitably forceful actuation. - In this embodiment, the
first chamber 126 has a length of about 6 inches and an annular thickness of about 0.2 inch. The second chamber has a length of about 24 inches and an annular thickness of about 0.18 inch. Each of thepassages 144A shown inFIGS. 9A and 9B has a width of about 0.3 inch and a depth of about 0.03 inch. Each of thepassages 144B shown inFIGS. 9C and 9D has a width of about 0.26 inch and a maximum depth of 0.04 inch. - Those skilled in the art appreciate that, in various embodiments, the
sleeve 114 may actuated by various means, and may be actuated to move downhole, uphole or in both directions. - For example, as shown in
FIG. 11 , in one embodiment, thesleeve 114 further comprises one or more annulargripping grooves 202 spaced axially on its inner surface at an axial location uphole of and adjacent thedownhole end 118 of the sleeve. A shiftingtool 204 in the form of a tubular having an outer diameter generally equal to or slightly smaller than the inner diameter of thesleeve 114 comprises a plurality ofkeys 206 correspondingly spaced on its outer surface adjacent thedownhole end 208 at locations corresponding to thegripping grooves 202. - To move the
sleeve 114, the shiftingtool 204 is first inserted into thesleeve 114 and positioned at a predefined location such that thekeys 206 on theshifting tool 204 are aligned to respectivegripping grooves 202 on thesleeve 114. Then, thekeys 206 are forced out to axially engage thegripping grooves 202 to hold thesleeve 114. Alternatively, thekeys 206 are biased or otherwise actuated to engage thegripping grooves 202. Another force such as a hydraulic force is applied to move theshifting tool 204 and thesleeve 114 downhole towards the second position. Those skilled in the art appreciate that a force may alternatively be applied to move theshifting tool 204 and thesleeve 114 uphole from a downhole position. - In another embodiment, the
sleeve 114 does not comprise gripping grooves. Rather, theannular end surface 172 is configured to be engaged by thekeys 206, such as to be radially “thicker” than that of theannular surface 178 of theshoulder 112, such that, when theannular end surface 172 rests against theshoulder surface 178, a radially inner portion of theend surface 172 is exposed out of theshoulder surface 178. - To move the
sleeve 114, a shiftingtool 204 comprising a plurality ofkeys 206 annually distributed on its outer surface adjacent thedownhole end 208 is first inserted into thesleeve 114 and positioned such that thekeys 206 on theshifting tool 204 are downhole to the sleeve'send surface 172. Then, thekeys 206 are forced out to axially engage the portion of theend surface 172 that is exposed out of theshoulder 112. Another force such as a hydraulic force is applied to move theshifting tool 204 and thesleeve 114 uphole. In this embodiment, the shiftingtool 204 can only “pull back” the sleeve uphole from a downhole position to an uphole position. - Those skilled in the art appreciate that other embodiments are also readily available. For example, those skilled in the art appreciate that the above-mentioned shock absorbing mechanism using the first and second
annular chambers angled end surface 172 ofsleeve 114 and theangled surface 178 on theshoulder 112, and the restraining mechanism comprising theannular tab 182 and theserrated grippers 184 do not have to be used together. A designer may choose to use any one or any combination of these mechanisms as needed. - In one embodiment, the
sleeve 114 comprises a plurality gripping grooves adjacent theuphole end 116. Correspondingly, a shiftingtool 204 comprises a plurality ofkeys 206 for axially engaging the gripping grooves adjacent theuphole end 116 to move thesleeve 114 uphole or downhole in a manner similar as described above. In another embodiment, thehousing 108 comprises an uphole shoulder at its uphole end with an annular surface radially “thinner” that the uphole end surface of the sleeve such that a radially inner portion of the sleeve's uphole end surface may be exposed out of the housing's uphole shoulder surface when the sleeve is at an uphole position. - To move the
sleeve 114, a shifting tool comprising a plurality of keys annually distributed on its outer surface adjacent its uphole end is first inserted into thesleeve 114 and positioned such that thekeys 206 on theshifting tool 204 are uphole to the sleeve's uphole end surface. Then, the keys are forced out to axially engage the portion of the uphole end surface that is exposed out of the housing's uphole shoulder. Another force such as a hydraulic force is applied to move the shifting tool and the sleeve downhole. In this embodiment, the shiftingtool 204 can only “push” the sleeve uphole from an uphole position to a downhole position. - In some alternative embodiments, the
uphole end 116 of thesleeve 114 comprises one or more ports (not shown) corresponding toports 110 on theuphole collar 108A. When thesleeve 114 is in the closed position, theuphole end 116 of thesleeve 114 blocks theports 110. When thesleeve 114 moves axially downhole to the open position, the ports on the uphole end of thesleeve 114 is aligned withrespective ports 110 on theuphole collar 108A, opening the ports and establishing fluid communication between the inside and outside of thehousing 108. - Those skilled in the art appreciate that the axially-extending
metering passages 142 may be formed in a variety of different ways in alternative embodiments.FIGS. 12A to 12D show some examples. - As shown in
FIG. 12A , in an alternative embodiment, theseal arrangement 142 is set to an angular position that thepassages 144B on its inner surface are not aligned with thepassages 144A on the outer surface of thesleeve 114. In this embodiment, themetering passages 144 for fluidly connecting the first andsecond chambers passages 144A on the sleeve side of the interface between thesleeve 114 and the barrier 122 (or more specifically the seal arrangement 142), andpassages 144B on the barrier side of the interface between thesleeve 114 and thebarrier 122. - As shown in
FIG. 12B , in another embodiment, thesleeve 114 is profiled to have thepassages 144A as described above. However, theinternal threads 152 on the inner surface of theseal arrangement 142 are circumferentially continuous, i.e., theseal arrangement 142 does not comprise any passages. In this embodiment, themetering passages 144 for fluidly connecting the first andsecond chambers passages 144A on the sleeve side of the interface between thesleeve 114 and thebarrier 122. - As shown in
FIG. 12C , in yet another embodiment, theseal arrangement 142 is profiled to have thepassages 144B as described above, but thesleeve 114 does not comprise any passages. In this embodiment, themetering passages 144 for fluidly connecting the first and second chambers only include thepassages 144B on the barrier side of the interface between thesleeve 114 and thebarrier 122. - As shown in
FIG. 12D , in still another embodiment, themetering passages 144 are formed as passages extending through the body of theseal arrangement 142. - In above embodiments, a plurality of
metering passages 144 are formed generally axially across theseal arrangement 142. However, those skilled in the art appreciate that, in some alternative embodiments, the shiftingsleeve 114 may comprise only onemetering passage 144 generally axially across thebarrier ring 122. - In some embodiments, should the sleeve be actuated from the downhole to the uphole position, the uphole movement can be similarly dampened as the dampening fluid F is metered back through the
metering passages 144 from thesecond chamber 128 to thefirst chamber 126. In these embodiments, thesecond chamber 128 does not comprise theopen port 124. - So as to manipulate the relative dampening for a downhole sleeve movement versus an uphole movement, the
second chamber 128 can be substantially filled with a second dampening fluid such as a second type of grease. Thus, where the first type of fluid filling thefirst chamber 126 is different from the second type of fluid filling in thesecond chamber 128, the extent of dampening will also differ. Where the first and second dampening fluids are same, the dampening will be similar. Note that when the fluids are different, repeated downhole and uphole actuation will result in a mingling of the fluids and an eventual equilibration of the dampening effects. - The above embodiments allow one to manufacture the
sleeve sub 102 using off-the-shelf products that may have loose tolerance. Theseal 148 added to thebarrier ring 122 is such an accommodation. In situations that one may control the components of thesleeve subs 102 to achieve fine tolerance as required, some alternative embodiments described below may be used. - In another embodiment, the uphole and
downhole ends annulus 120 are formed by an upset in diameter of respective housings' ends 108A,108B, decreasing in diameter from thehousing 108 to seal surfaces, corresponding to the seal surfaces of the sleeve's ends 116,118. The annulusuphole end 120A is sufficiently spaced downhole from theports 110 such that the sleeve'suphole end 116 remains sealed to the housings upholeend 108A in the downhole closed position. - In an alternative embodiment, albeit using more seals than previous embodiments, the
annulus 120 can be sealed axially at its uphole and downhole ends and fixed with respect to thesleeve 114. Thebarrier ring 122 is coupled to the inner surface of thehousing 108 at a location fixed therebetween. Thebarrier ring 122 is in sealable contact with the outer surface of thesleeve 114, and divides theannulus 120 into a first chamber uphole to thebarrier ring 122 and a second chamber downhole thereto. Similar to the embodiments above, one or more metering passages are formed in or under thebarrier ring 122 for fluidly connecting the first and second chambers. A first type dampening fluid is enclosed in the first chamber and a second type fluid is dampening enclosed in the second chamber. - In well completion operation, when the
sleeve 114 is shifted downhole to open theports 110, the spaced and sealed uphole and downhole ends of theannulus 120 are shifted downhole with thesleeve 114. As theseal arrangement 122 is not moving, the first chamber is then pressurized causing the fluid therein to flow into the second chamber through metering passages across thebarrier ring 122. The pressurization of the fluid in the first chamber dampens the impact to thesleeve 114. - In some other embodiments, the
annulus 120 may be divided by a plurality of barriers into more than two chambers. One or more metering passages are formed across each barrier such that the chambers are fluidly connected. The chambers may be substantively filled with the same type or different types of dampening fluid such as grease. - In an alternative embodiment, the
annulus 120 is a contiguous space, i.e., not divided. Thedownhole end 120B is sealably coupled to thehousing 108 and theuphole end 120A is sealably coupled to thesleeve 144. Theannulus space 120 is filled with a compressible fluid such as Nitrogen. When thesleeve 114 is moving axially from the first position downhole to the second position, the position of thedownhole end 120B is unchanged while the position of theuphole end 120A is axially moving towards thedownhole end 120B. The volume of theannulus 120 is then reduced, compressing the compressible fluid therein. As a result, the compressed fluid dampens the impact caused by the stopping of thesleeve 114. - Although in above embodiments, the
seal arrangement 142 is threaded to a plurality of threads on the outer surface of thesleeve 114, in some other embodiments, theseal arrangement 142 is fixed to thesleeve 114 using other suitable means such as welding, glue or other suitable fasteners. In these embodiments, the metering passages across thebarrier ring 122 may be within theseal arrangement 142. - Although in above embodiments, one or more barrier rings 122 are used for sealably dividing the
annulus 120 into two or more chambers, in some alternative embodiments, the barrier rings 122 divide theannulus 120 into chambers in an unsealed manner and leave an annular gap for fluidly connecting the chambers. The gap may be carefully designed to achieve desired fluid flow capacity for controlling shock absorption. - In an alternative embodiment shown in
FIG. 13A , thesleeve sub 102 does not comprise any passage across thebarrier ring 122. Rather, one ormore metering passages 222 are formed through thehousing 108 at a location or locations corresponding to thefirst chamber 224 for controllably releasing the dampening fluid F out of thefirst chamber 224 into the exterior of thesleeve sub 102 when the volume of thefirst chamber 224 is reduced during the movement of the sleeve. - In an alternative embodiment shown in
FIG. 13B , thesleeve sub 102 does not comprise any passage across thebarrier ring 122. Rather, one ormore metering passages 226 are formed through thesleeve 114 at a location or locations corresponding to thefirst chamber 228 for controllably releasing the dampening fluid F out of thefirst chamber 228 into the interior of thesleeve 114 when the volume of thefirst chamber 228 is reduced during the movement of the sleeve. - Those skilled in the art appreciate that in other embodiments, one may form metering passages through any combination of the
barrier ring 122, thehousing 108 and thesleeve 114 for controllably releasing the dampening fluid out of the first chamber during the movement of thesleeve 114.
Claims (20)
1. A downhole apparatus comprising:
a tubular housing along a tubing string;
a sleeve located within the housing and axially moveable therein from a first position to a second position; and
a first annular chamber radially intermediate the housing and the sleeve, said first annular chamber containing a first dampening fluid and being capable of controllably releasing the first dampening fluid under pressure; wherein
when the sleeve moves from the first position to the second position, the first dampening fluid is pressurized and controllably released for controlling the speed of the sleeve movement.
2. The apparatus of claim 1 wherein the first dampening fluid is a substantially incompressible fluid.
3. The apparatus of claim 2 wherein the first dampened fluid is grease.
4. The apparatus of claim 2 wherein the first dampened fluid has a viscosity index in the range between 80 and 110.
5. The apparatus of claim 2 wherein the first dampened fluid has a viscosity index of 90.
6. The downhole apparatus of claim 1 further comprising:
a second annular chamber radially intermediate the housing and the sleeve, and axially immediately adjacent the first annular chamber; wherein the second annular chamber is in fluid communication with the first chamber for receiving the first dampening fluid released from the first chamber.
7. The apparatus of claim 6 wherein the first chamber has a first volume and the second chamber has a second volume, the first volume being smaller than the second volume.
8. The apparatus of claim 6 wherein the second chamber contains a second dampening fluid.
9. The apparatus of claim 8 wherein the first and second dampening fluids are like fluids.
10. The apparatus of claim 8 wherein the first and second dampening fluids are different fluids.
11. The downhole apparatus of claim 6 wherein the first and second chambers are formed from an annular space radially intermediate the housing and the sleeve, and wherein an annular barrier divides the annular space into the first and second chambers.
12. The downhole apparatus of claim 11 wherein the annular space is located at a fixed location with respect to the housing, and the annular barrier is fixed to the sleeve and moveable therewith, the movement of the annular barrier simultaneously reducing the volume of the first chamber and enlarging the volume of the second chamber.
13. The apparatus of claim 12 wherein said barrier comprises a seal arrangement for sealing between the sleeve and the housing.
14. The apparatus of claim 12 wherein the barrier is threadably engaged along the sleeve.
15. The downhole apparatus of claim 11 wherein the annular space is located at a fixed location with respect to the sleeve and moveable therewith, and the annular barrier is located at a fixed location with respect to the housing, the movement of the annular barrier simultaneously reducing the volume of the first chamber and enlarging the volume of the second chamber.
16. The downhole apparatus of claim 11 wherein the apparatus further comprises at least one metering passage fluidly connecting the first and second chambers across the barrier.
17. The apparatus of claim 16 wherein the at least one metering passage extends axially through the interface of the sleeve and the barrier.
18. A method of moving a sleeve in a housing axially from a first position to a second position, said housing being used in a tubing string, said method comprising:
providing a first annular chamber radially intermediate the housing and the sleeve;
enclosing a first dampening fluid in the first chamber;
moving the sleeve from the first position to the second position; and
during the movement of the sleeve,
pressurizing the first dampening fluid in the first chamber, and
controllably releasing the pressurized first dampening fluid out of the first chamber for controlling the speed of the sleeve.
19. The method of claim 25 further comprising:
providing a second annular chamber radially intermediate the housing and the sleeve, and axially immediately adjacent the first annular chamber, wherein the second annular chamber is in fluid communication with the first chamber; and
receiving, in the second chamber, controlled release of fluid out of the first chamber during the movement of the sleeve.
20. A method of moving a sleeve in a housing axially from a first position to a second position, said housing being used in a tubing string, said method comprising:
providing a closed annular space radially intermediate the housing and the sleeve;
dividing the annular space into a first and a second chambers in fluid communication;
enclosing incompressible fluid in the first and second chambers;
moving the sleeve from the first position to the second position; and
during the movement of the sleeve,
simultaneously reducing the volume of the first chamber and increasing the volume of the second chamber to pressurize the fluid in the first chamber and force the fluid in the first chamber to controllably flow into the second chamber for dampening the sleeve's movement.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/745,199 US20200149369A1 (en) | 2013-07-10 | 2020-01-16 | Downhole tool having a shock-absorbing sleeve |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361844664P | 2013-07-10 | 2013-07-10 | |
US14/328,422 US9840888B2 (en) | 2013-07-10 | 2014-07-10 | Downhole tool having a shock-absorbing sleeve |
US15/783,036 US10605045B2 (en) | 2013-07-10 | 2017-10-13 | Downhole tool having a shock-absorbing sleeve |
US16/745,199 US20200149369A1 (en) | 2013-07-10 | 2020-01-16 | Downhole tool having a shock-absorbing sleeve |
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Application Number | Title | Priority Date | Filing Date |
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US15/783,036 Continuation US10605045B2 (en) | 2013-07-10 | 2017-10-13 | Downhole tool having a shock-absorbing sleeve |
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US20200149369A1 true US20200149369A1 (en) | 2020-05-14 |
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ID=52274450
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Application Number | Title | Priority Date | Filing Date |
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US14/328,422 Active 2035-08-21 US9840888B2 (en) | 2013-07-10 | 2014-07-10 | Downhole tool having a shock-absorbing sleeve |
US15/783,036 Active 2035-02-03 US10605045B2 (en) | 2013-07-10 | 2017-10-13 | Downhole tool having a shock-absorbing sleeve |
US16/745,199 Abandoned US20200149369A1 (en) | 2013-07-10 | 2020-01-16 | Downhole tool having a shock-absorbing sleeve |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
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US14/328,422 Active 2035-08-21 US9840888B2 (en) | 2013-07-10 | 2014-07-10 | Downhole tool having a shock-absorbing sleeve |
US15/783,036 Active 2035-02-03 US10605045B2 (en) | 2013-07-10 | 2017-10-13 | Downhole tool having a shock-absorbing sleeve |
Country Status (2)
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US (3) | US9840888B2 (en) |
CA (2) | CA2856830C (en) |
Families Citing this family (4)
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CN103473994B (en) * | 2013-09-16 | 2015-06-03 | 樊书印 | Electronic photo album |
CA3169533A1 (en) | 2014-12-29 | 2016-06-29 | Ncs Multistage Inc. | Tool for opening and closing sleeves within a wellbore |
CA3017675A1 (en) | 2018-09-18 | 2020-03-18 | K4 Integration Inc. | Ore tag assembly and system and method re same |
WO2020163613A1 (en) * | 2019-02-06 | 2020-08-13 | G&H Diversified Manufacturing Lp | Systems and methods for setting a downhole plug using a self damping setting tool |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2516782A (en) * | 1945-12-29 | 1950-07-25 | Houdaille Hershey Corp | Valve structure for hydraulic shock absorbers |
US3949150A (en) * | 1974-07-11 | 1976-04-06 | Leonard Mason | Drilling string shock-absorbing tool |
US3998443A (en) * | 1975-02-18 | 1976-12-21 | Edwin A. Anderson | Multidirectional shock absorbing device |
US4220173A (en) * | 1978-07-31 | 1980-09-02 | Brien John W O | Time delay fluid valve |
US5083623A (en) * | 1990-12-03 | 1992-01-28 | Halliburton Company | Hydraulic shock absorber |
US8522877B2 (en) * | 2009-08-21 | 2013-09-03 | Baker Hughes Incorporated | Sliding sleeve locking mechanisms |
-
2014
- 2014-07-10 CA CA2856830A patent/CA2856830C/en active Active
- 2014-07-10 US US14/328,422 patent/US9840888B2/en active Active
- 2014-07-10 CA CA3027571A patent/CA3027571C/en active Active
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- 2017-10-13 US US15/783,036 patent/US10605045B2/en active Active
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2020
- 2020-01-16 US US16/745,199 patent/US20200149369A1/en not_active Abandoned
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US9840888B2 (en) | 2017-12-12 |
US10605045B2 (en) | 2020-03-31 |
US20180038198A1 (en) | 2018-02-08 |
CA3027571A1 (en) | 2015-01-10 |
US20150013991A1 (en) | 2015-01-15 |
CA3027571C (en) | 2020-10-27 |
CA2856830C (en) | 2019-02-05 |
CA2856830A1 (en) | 2015-01-10 |
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