WO2008070051A2 - Restriction element trap for use with and actuation element of a downhole apparatus and method of use - Google Patents
Restriction element trap for use with and actuation element of a downhole apparatus and method of use Download PDFInfo
- Publication number
- WO2008070051A2 WO2008070051A2 PCT/US2007/024795 US2007024795W WO2008070051A2 WO 2008070051 A2 WO2008070051 A2 WO 2008070051A2 US 2007024795 W US2007024795 W US 2007024795W WO 2008070051 A2 WO2008070051 A2 WO 2008070051A2
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- WIPO (PCT)
- Prior art keywords
- restriction element
- trap
- sleeve
- drilling fluid
- tubular body
- Prior art date
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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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
- E21B34/142—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools unsupported or free-falling elements, e.g. balls, plugs, darts or pistons
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/08—Measuring diameters or related dimensions at the borehole
Definitions
- the present invention relates generally to a restriction element trap for use with an actuation element of a downhole apparatus and method of use thereof and, more particularly, to a trap sleeve in an actuation sleeve for conditionally exposing hydraulic fluid pressure to operational components of an expandable reamer apparatus for enlarging a subterranean borehole beneath a casing or liner.
- Expandable reamers are typically employed for enlarging subterranean borehole.
- casing is installed and cemented to prevent the well bore walls from caving into the subterranean borehole while providing requisite shoring for subsequent drilling operation to achieve greater depths.
- Casing is also conventionally installed to isolate different formations, to prevent crossflow of formation fluids, and to enable control of formation fluids and pressure as the borehole is drilled.
- new casing is laid within and extended below the previous casing. While adding additional casing allows a borehole to reach greater depths, it has the disadvantage of narrowing the borehole. Narrowing the borehole restricts the diameter of any subsequent sections of the well because the drill bit and any further casing must pass through the existing casing.
- the fluid flow path is interrupted when a restriction element, such as a so-called "drop ball,” is deployed upon the sleeve seat allowing hydraulic fluid pressure to build thereupon until the actuation sleeve is displaced.
- the restriction element is retained within the sleeve seat by gravity or while fluid pressure is maintained thereupon.
- conventional reamer designs do not provide positive retention of the restriction element.
- a conventional gravel packing tool as generally described in United States Patent number 6,702,020 entitled “Crossover Tool,” provides a sleeve for trapping a ball.
- the ball is dropped into the tool and lands on a thin sleeve which acts as the initial ball seat.
- the ball Upon pressure buildup, the ball is forced past the thin sleeve and into sealing contact with a seat of a second sleeve, which is an extension of the thin sleeve and where both sleeves are retained in the tool.
- a shear pin holds the second sleeve in its initial position.
- a snap ring is mounted to the second sleeve and it is able to snap out of its recess allowing the second sleeve shifts as a result of applied fluid pressure upon the ball on the seat and when the fluid pressure is sufficient to shear the shear pins holding the second sleeve in its initial position.
- the internal diameter of the thin sleeve, through which the ball has already been forced is further reduced as it is pulled through a reduced diameter of a surrounding body and locks the ball into the seat. The ball cannot be dislodged, particularly in the opposite direction, until a predetermined pressure is exceeded.
- a sleeve for trapping a ball of a conventional gravel packing tool is undesirable for use with a downhole tool that includes an actuation sleeve, such as an expandable reamer apparatus, particularly where the actuation sleeve is selectively retained by fluid pressure and release of the actuation sleeve is desired only after the restriction elements is secured.
- shock wave or pressure build-up in order to secure the restriction element may likely initiate premature releasing of an actuation sleeve, rendering the captioning of the restriction element in an indeterminate or unknown state and possible premature tool activation.
- a downhole apparatus in at least one embodiment of the invention for engaging a borehole wall in a subterranean formation.
- the downhole apparatus includes a tubular body having a longitudinal axis and a first bore, an actuation element having a second bore and is positioned within the first bore of the tubular body, a drilling fluid flow path extending through the first and second bores, and a restriction element trap positioned within the second bore of the actuation element.
- the actuation element is configured to selectively isolate an operable component of the downhole apparatus from exposure to drilling fluid and the restriction element trap is configured for retentively receiving a restriction element.
- a restriction element trap for use with an actuation element for retentively receiving a restriction element.
- the restriction element trap provides determinate retention of a restriction element when used with, for example, a traveling sleeve of an expandable reamer apparatus.
- an expandable reamer apparatus for enlarging a borehole in a subterranean formation.
- the expandable reamer apparatus configured for positive retention of a restriction element with passive components.
- a method of using a downhole apparatus within a borehole of a subterranean formation is provided. The method provides verifiable retention of a restriction element within the downhole apparatus prior to dynamic release of an actuation element.
- FIG. 1 is a side view of an expandable reamer apparatus comprising a restriction element trap in accordance with an embodiment of the invention
- FIG. 2 shows a longitudinal cross-sectional view of the expandable reamer apparatus shown in FIG. 1 ;
- FIG. 3 shows an enlarged cross-sectional view of another portion of the expandable reamer apparatus shown in FIG. 2;
- FIG. 4 shows an enlarged cross-sectional view of yet another portion of the expandable reamer apparatus shown in FIG. 2
- FIG. 5 shows an enlarged cross-sectional view of a further portion of the expandable reamer apparatus shown in FIG. 2;
- FIG. 6 shows a cross-sectional view of a shear assembly of an embodiment of the expandable reamer apparatus
- FIG. 7 shows a partial, longitudinal cross-sectional illustration of an embodiment of the expandable reamer apparatus in a closed, or retraced, initial tool position
- FIG. 8 shows a partial, longitudinal cross-sectional illustration of the expandable reamer apparatus of FIG. 7 in the initial tool position, receiving a ball in a fluid path;
- FIG. 9 shows a partial, longitudinal cross-sectional illustration of the expandable reamer apparatus of FIG. 7 in the initial position tool in which the ball moves into a ball seat and is captured;
- FIG. 10 shows a partial, longitudinal cross-sectional illustration of the expandable reamer apparatus of FIG. 7 in which a shear assembly is triggered as pressure is accumulated and a traveling sleeve begins to move down within the apparatus, leaving the initial tool position
- FIG. 11 shows a partial, longitudinal cross-sectional illustration of the expandable reamer apparatus of FIG. 7 in which the traveling sleeve moves toward a lower, retained position while a blade being urged by a push sleeve under the influence of fluid pressure moves toward an extended position
- FIG. 12 shows a partial, longitudinal cross-sectional illustration of the expandable reamer apparatus of FIG.
- FIG. 7 shows a partial, longitudinal cross-sectional illustration of the expandable reamer apparatus of FIG. 7 in which the blades (one depicted) are retracted into a retracted position by a biasing spring when the fluid pressure is dissipated.
- the expandable reamer apparatus 100 may include a generally cylindrical tubular body 108 having a longitudinal axis L 8 .
- the tubular body 108 of the expandable reamer apparatus 100 may have a lower end 190 and an upper end 191.
- the terms "lower” and "upper,” as used herein with reference to the ends 190, 191, refer to the typical positions of the ends 190, 191 relative to one another when the expandable reamer apparatus 100 is positioned within a well bore.
- the lower end 190 of the tubular body 108 of the expandable reamer apparatus 100 may include a set of threads (e.g., a threaded male pin member) for connecting the lower end 190 to another section of a drill string or another component of a bottom-hole assembly (BHA), such as, for example, a drill collar or collars carrying a pilot drill bit for drilling a well bore.
- the upper end 191 of the tubular body 108 of the expandable reamer apparatus 100 may include a set of threads (e.g., a threaded female box member) for connecting the upper end 191 to another section of a drill string or another component of a bottom-hole assembly (BHA).
- Three sliding cutter blocks or blades 101 are positionally retained in circumferentially spaced relationship in the tubular body 108 as further described below and may be provided at a position along the expandable reamer apparatus 100 intermediate the first lower end 190 and the second upper end 191.
- the blades 101 may be comprised of steel, tungsten carbide, a particle-matrix composite material (e.g., hard particles dispersed throughout a metal matrix material), or other suitable materials as known in the art.
- the blades 101 are retained in an initial, retracted position within the tubular body 108 of the expandable reamer apparatus 100 as illustrated in FIG. 7, but may be moved responsive to application of hydraulic pressure into the extended position
- the expandable reamer apparatus 100 may be configured such that the blades 101 engage the walls of a subterranean formation surrounding a well bore in which apparatus 100 is disposed to remove formation material when the blades 101 are in the extended position, but are not operable to so engage the walls of a subterranean formation within a well bore when the blades 101 are in the retracted position. While the expandable reamer apparatus 100 includes three blades 101, it is contemplated that one, two or more than three blades may be utilized to advantage.
- the blades 101 are symmetrically circumferentially positioned axial along the tubular body 108, the blades may also be positioned circumferentially asymmetrically as well as asymmetrically along the longitudinal axis L 8 in the direction of either end 190 and 191.
- the tubular body 108 encloses a fluid passageway 192 that extends longitudinally through the tubular body 108.
- the fluid passageway 192 directs fluid substantially through an inner bore 151 of an actuation element, or traveling sleeve. 128 in bypassing relationship to substantially shield the blades 101 from exposure to drilling fluid, particularly in the lateral direction, or normal to the longitudinal axis L 8 .
- the particulate-entrained fluid is less likely to cause build-up or interfere with the operational aspects of the expandable reamer apparatus 100 by shielding the blades 101 from exposure with the fluid.
- beneficial shielding of the blades 101 is not necessary to the operation of the expandable reamer apparatus 100 where, as explained in further detail below, the operation, i.e., extension from the initial position, the extended position and the retracted position, occurs by an axially directed force that is the net effect of the fluid pressure and spring biases forces.
- the axially directed force directly actuates the blades 101 by axially influencing the actuating means, such as a push sleeve 116 for example, and without limitation, as better described herein below.
- the expandable reamer apparatus 100 may be configured such that the outermost radial or lateral extent of each of the blades 101 is recessed within the tubular body 108 when in the initial or retracted positions so it may not extend beyond the greatest extent of outer diameter of the tubular body 108. Such an arrangement may protect the blades 101 as the expandable reamer apparatus 100 is disposed within a casing of a borehole, and may allow the expandable reamer apparatus 100 to pass through such casing within a borehole. In other embodiments, the outermost radial extent of the blades 101 may coincide with or slightly extend beyond the outer diameter of the tubular body 108. As illustrated in FIG.
- the blades 101 may extend beyond the outer diameter of the tubular body 108 when in the extended position, to engage the walls of a borehole in a reaming operation.
- FIGS. 3-5 show enlarged partial longitudinal cross-sectional views of various portions of the expandable reamer apparatus 100. Reference may also be made back to FIG. 1 as desired.
- the tubular body 108 positionally respectively retains three sliding cutter blocks or blades 101 in three blade tracks 148.
- the blades 101 each carry a plurality of cutting elements 104 for engaging the material of a subterranean formation defining the wall of an open bore hole when the blades 101 are in an extended position (shown in FIG. 22).
- the cutting elements 104 may be polycrystalline diamond compact (PDC) cutters or other cutting elements known to a person of ordinary skill in the art.
- the expandable reamer apparatus 100 includes a shear assembly 150 for retaining the expandable reamer apparatus 100 in the initial position by securing the traveling sleeve 128 toward the upper end 191 thereof. Reference may also be made to FIG. 6, showing a partial view of the shear assembly 150.
- the shear assembly 150 includes an uplock sleeve 124, some number of shear screws 127 and the traveling sleeve 128.
- the uplock sleeve 124 is retained within an inner bore 151 of the tubular body 108 between a lip 152 and a retaining ring 132 (shown in FIG.
- the uplock sleeve 124 includes shear slots 154 for retaining each of the shear screws 127, where, in the current embodiment of the invention, each shear screw 127 is threaded into a shear port 155 of the traveling sleeve 128.
- the shear screws 127 hold the traveling sleeve 128 within the inner bore 156 of the uplock sleeve 124 to conditionally prevent the traveling sleeve 128 from axially moving in a downhole direction 157, i.e., toward the lower end 190 of the expandable reamer apparatus 100.
- the uplock sleeve 124 includes an inner lip 158 to prevent the traveling sleeve 128 from moving in the uphole direction 159, i.e., toward the upper end 191 of the expandable reamer apparatus 100.
- An O-ring seal 134 seals the traveling sleeve 128 between the inner bore 156 of the uplock sleeve 124.
- shear screws 127 When the shear screws 127 are sheared, the traveling sleeve 128 is allowed to axially travel within the tubular body 108 in the downhole direction 157.
- the portions of the shear screws 127 when sheared are retained within the uplock sleeve 124 and the traveling sleeve 128 in order to prevent the portions from becoming loose or being lodged in other components when drilling the borehole.
- shear screws 127 are shown, other shear elements may be used to advantage, for example, without limitation, a shear rod, a shear wire and a shear pin.
- other shear elements may include structure for positive retention within constituent components after being exhausted, similar in manner to the shear screws 127 of the current embodiment of the invention.
- the shear assembly 150 may releasably restrain the actuation sleeve within the inner bore 156 of an expandable reamer apparatus 100 by way of shear pins, interlocking members, fiictional elements, or friable and frangible members.
- uplock sleeve 124 further includes a collet 160 that axially retains a seal sleeve 126 between the inner bore 151 of the tubular body 108 and an outer bore 162 of the traveling sleeve 128.
- the uplock sleeve 124 also includes one or more ears 163 and one or more ports 161 axially spaced there around.
- the one or more ears 163 spring radially inward to lock the motion of the traveling sleeve 128 between the ears 163 of the uplock sleeve 124 and between a shock absorbing member 125 mounted upon an upper end of the seal sleeve 126. Also, as the traveling sleeve 128 positions a sufficient axial distance in the downhole direction 157, the one or more ports 161 of the uplock sleeve 124 are fluidly exposed allowing fluid to communicate with a nozzle intake port 164 from the fluid passageway 192.
- shock absorbing member 125 of the seal sleeve 126 provides spring retention of the traveling sleeve 128 with the ears of the uplock sleeve 124 and also mitigates impact shock caused by the traveling sleeve 128 when its motion is stopped by the seal sleeve 126.
- Shock absorbing member 125 may comprise a flexible or compliant material, such as, for instance, an elastomer or other polymer. In one embodiment, shock absorbing member 125 may comprise a nitrile rubber.
- Utilizing a shock absorbing member 125 between the traveling sleeve 128 and seal sleeve 126 may reduce or prevent deformation of at least one of the traveling sleeve 128 and seal sleeve 126 that may otherwise occur due to impact therebetween.
- any sealing elements or shock absorbing members disclosed herein that are included within expandable reamer apparatus 100 may comprise any suitable material as known in the art, such as, for instance, a polymer or elastomer.
- a material comprising a sealing element may be selected for relatively high temperature (e.g., about 400° Fahrenheit or greater) use.
- seals may be comprised of TeflonTM, polyetheretherketone ("PEEKTM”) material, a polymer material, or an elastomer, or may comprise a metal to metal seal suitable for expected borehole conditions.
- any sealing element or shock absorbing member disclosed herein such as shock absorbing member 125 and sealing elements 134 and 135, discussed hereinabove, or sealing elements, such as seal 136 discussed herein below, or other sealing elements included by an expandable reamer apparatus of the invention may comprise a material configured for relatively high temperature use, as well as for use in highly corrosive borehole environments.
- the seal sleeve 126 includes an 0-ring seal 136 sealing it between the inner bore 151 of the tubular body 108, and a T-seal seal 137 sealing it between the outer bore 162 of the traveling sleeve 128, which completes fluid sealing between the traveling sleeve 128 and the nozzle intake port 164. Furthermore, the seal sleeve 126 axially aligns, guides and supports the traveling sleeve 128 within the tubular body 108.
- seal sleeve seals 136 and 137 may also prevent hydraulic fluid from leaking from within the expandable reamer apparatus 100 to outside the expandable reamer apparatus 100 by way of the nozzle intake port 164 prior to the traveling sleeve 128 being released from its initial position.
- a downhole end 165 of the traveling sleeve 128 (also see FIG. 3), which includes a seat stop sleeve 130, is aligned, axially guided and supported by an annular piston or lowlock sleeve 117.
- the lowlock sleeve 117 is axially coupled to a push sleeve 115 that is cylindrically retained between the traveling sleeve 128 and the inner bore 151 of the tubular body 108.
- the hydraulic pressure may act on the push sleeve 115 concentric to the tool axis and upon the lowlock sleeve 117 between the outer bore 162 of the traveling sleeve 128 and the inner bore 151 of the tubular body 108.
- the push sleeve 115 is prevented from moving in the uphole direction 159 by a lowlock assembly, i.e., one or more dogs 166 of the lowlock sleeve 117.
- Each dog 166 of the lowlock sleeve 117 is a collet or locking dog latch having an expandable detent 168 that may engage the groove 167 of the tubular body 108 when compressively engaged by the seat stop sleeve 130.
- the dogs 166 hold the lowlock sleeve 117 in place and prevent the push sleeve 115 from moving in the uphole direction 159 until the "end" or seat stop sleeve 130, with it larger outer diameter 169, travels beyond the lowlock sleeve 117 allowing the dogs 166 to retract axially inward toward the smaller outer diameter 170 of the traveling sleeve 128.
- the dogs 166 retract axially inward they may be disengaged from the groove 167 of the tubular body 108, allowing the push sleeve 115 to be subjected to hydraulic pressure primarily in the axial direction, i.e., in the uphole direction 159.
- the lowlock sleeve 117 supports the weight of the traveling sleeve 128, minimizing the extent to which the shear assembly 150 is subjected to forces that potentially could weaken or cause premature failure of the shear elements, i.e., the shear screws 127.
- the shear assembly 150 requires an affirmative act, such as introducing a ball or other restriction element into the expandable reamer apparatus 100 to cause the pressure from hydraulic fluid flow to increase as a restriction element is captured in the restriction element trap 200 of the invention, before the shear screws 127 will shear or the shear assembly 150 will release the actuating, or traveling sleeve 128.
- the restriction element trap 200 shown in FIGS. 2 and 3 is located in the downhole end 165 of the traveling sleeve 128. It is recognized that the restriction element trap 200 may be located in the mid or upper portion of the actuation element, or traveling sleeve 128.
- the restriction element trap 200 includes within an inner bore 194 of the traveling sleeve 128 a ball trap sleeve 129 and a tubular plug 131.
- An O-ring seal 139 may optionally be included to provide an additional seal between the inner bore 194 of the traveling sleeve 128 and the plug 131.
- a restriction element in the form of a ball 147 shown in FIGS.
- the expandable reamer apparatus 100 may be introduced into the expandable reamer apparatus 100 in order to enable operation of the expandable reamer apparatus 100 to initiate or "trigger" the action of the shear assembly 150 upon or after the restriction element is determinatively secured within the restriction element trap 200.
- fluid will carry the ball 147 into the restriction element trap 200 allowing the ball 147 to be retained by an annular portion 197 of the ball trap sleeve 129 yielding within an enlarged bore 196 of the inner bore 194 of the traveling sleeve 128 and sealed there against the seat portion 195 of the plug 131.
- the ball 147 may be retained within the inner bore of the plug 131 after being lodged therein by hydraulic fluid pressure created by the fluid flow.
- the restriction element trap 200 provides simplified static parts, i.e., the ball trap sleeve 129 and the plug 131 , for robustly receiving and retaining a restriction element.
- the restriction element i.e., the ball 147
- the restriction element trap 200 is sized and configured to engage the restriction element trap 200 at seat portion 195 complementarily sized and configured to substantially prevent the flow of drilling fluid through the traveling sleeve 128 and to cause displacement of the traveling sleeve 128 within the expandable reamer apparatus to a position that allows communication between drilling fluid within the inner bore 151 and operational components, such as the actuating structure of the push sleeve 115.
- the ball 147 used to activate the expandable reamer apparatus 100 may engage the ball trap sleeve 129 and or the plug 131 of the restriction element trap 200 that include malleable characteristics, such that the ball 147 may swage therein as it seats in order to prevent the ball 147 from moving around and potentially causing problems or damage to the expandable reamer apparatus 100.
- the ball trap sleeve 129 and the plug 131 may be made from a resilient malleable material, such as metal, elastomer, or other material having a deformable quality suitable for retentively receiving the ball 147 therein.
- the annular portion 197 of the ball trap sleeve 129 is a thin- walled annular conduit made of relatively low yield-strength metal suitable for deforming into the recess of the enlarged bore 196 of the traveling sleeve 128 as the ball 147 is received therein.
- the plug 131 is made of, or lined with, a resilient plastic material, such as tetrafluoroethylene (TFE), being suitable for capturing and stopping the ball 147 as it is trapped therein.
- TFE tetrafluoroethylene
- the seat stop sleeve 130 and the downhole end 165 of the traveling sleeve 128 are retained in a stabilizer sleeve 122.
- the stabilizer sleeve 122 is coupled to the inner bore 151 of the tubular body 108 and retained between a retaining ring 133 and a protect sleeve 121, which is held by an annular lip 171 in the inner bore 151 of the tubular body 108.
- the retaining ring 133 is held within an annular groove 172 in the inner bore 151 of the tubular body 108.
- the protect sleeve 121 provides protection from the erosive nature of the hydraulic fluid to the tubular body 108 by allowing hydraulic fluid to flow through fluid ports 173 of the traveling sleeve 128, impinge upon the protect sleeve 121 and past the stabilizer sleeve 122 when the traveling sleeve 128 is retained therein. After the traveling sleeve 128 travels sufficiently far enough to allow the dogs 166 of the lowlock sleeve 117 to be disengaged from the groove 167 of the tubular body 108, the dogs 166 of the lowlock sleeve 117 being connected to the push sleeve 115 may all move in the uphole direction 159. Reference may also be made to FIGS. 3, 4 and 11.
- the differential pressure between the inner bore 151 and the outer side 183 of the tubular body 108 caused by the hydraulic fluid flow must be sufficient to overcome the restoring force or bias of a spring 116.
- the compression spring 116 that resists the motion of the push sleeve 115 in the uphole direction 159, is retained on the outer surface 175 of the push sleeve 115 between a ring 113 attached in a groove 174 of the tubular body 108 and the lowlock sleeve 117.
- the push sleeve 115 may axially travel in the uphole direction 159 under the influence of the hydraulic fluid, but is restrained from moving beyond the top lip of the ring 113 and beyond the protect sleeve 184 in the downhole direction 157.
- the push sleeve 115 may include a T-seal seal 138 between the tubular body 108, a T-seal seal 137 between the traveling sleeve 128, and a wiper seal 141 between the traveling sleeve 128 and push sleeve 115.
- the push sleeve 115 includes at its uphole section 176 a yoke 114 coupled thereto as shown in FIG. 4.
- the yoke 114 includes three arms 177, each arm 177 being coupled to one of the blades 101 by a pinned linkage 178.
- the arms 177 may include a shaped surface suitable for expelling debris as the blades 101 are retracted toward the retracted position.
- the shaped surface of the arms 177 in conjunction with the adjacent wall of the cavity of the body 108, may provide included angles of approximately 20 degrees, which is preferable to dislodge and remove any packed-in shale, and may further include low friction surface material to prevent sticking by formation cuttings and other debris.
- the pinned linkage 178 includes a linkage 118 coupling a blade to the arm 177, where the linkage 118 is coupled to the blade by a blade pin 119 and secured by a retaining ring 142, and the linkage 118 is coupled to the arm 177 by a yoke pin 120 which is secured by a cotter pin 144.
- the pinned linkage 178 allows the blades 101 to rotationally transition about the arms 177 of the yoke 114, particularly as the actuating means directly transitions the blades 101 between the extended and retracted positions.
- the actuating mean i.e., the push sleeve 115, the yoke 114, and or the linkage 178
- directly retracts as well as extends the blades 101 whereas conventional wisdom has directed the use of one part for harnessing hydraulic pressure to force the blade laterally outward and another part, such as a spring, to force the blades inward.
- the blades 101 may transition between the extended and retracted positions, they are each positionally coupled to one of the blade tracks 148 in the tubular body 108 as particularly shown in FIGS. 2 and 4.
- the blade track 148 includes a dovetailed shaped groove 179 that axially extends along the tubular body 108 on a slanted slope 180 having an acute angle with respect to the longitudinal axis L 8 .
- Each of the blades 101 include a dovetailed shaped rail (not shown) that substantially matches the dovetailed shaped groove 179 of the blade track 148 in order to slideably secure the blades 101 to the tubular body 108.
- the blades 101 are pushed along the blade tracks 148 until the forward motion is stopped by the tubular body 108 or the upper stabilizer block 105 being coupled to the tubular body 108. In the upward-outward or fully extended position, the blades 101 are positioned such that the cutting elements 104 will enlarge a bore hole in the subterranean formation by a prescribed amount.
- the spring 116 will urge the blades 101 via the push sleeve 115 and the pinned linkage 178 into the retracted position.
- the shoe may contact the blades 101 helping to urge or force them down the tracks 148, allowing the expandable reamer apparatus 100 to be retrieved from the borehole.
- the expandable reamer apparatus 100 includes retraction assurance feature to further assist in removing the expandable reamer apparatus from a bore hole.
- the slope 180 of blade tracks 148 is ten degrees, taken with respect to the longitudinal axis L 8 of the expandable reamer apparatus 100.
- the expandable reamer apparatus 100 also includes a mid stabilizer block 106 and a lower stabilizer block 107.
- the stabilizer blocks 105, 106, 107 help to center the expandable reamer apparatus 100 in the drill hole while being run into position through a casing or liner string and also while drilling and reaming the borehole.
- the upper stabilizer block 105 may be used to stop or limit the forward motion of the blades 101 , determining the extent to which the blades 101 may engage a bore hole while drilling.
- the upper stabilizer block 105 in addition to providing a back stop for limiting the lateral extent of the blades, may provide for additional stability when the blades 101 are retracted and the expandable reamer apparatus 100 of a drill string is positioned within a bore hole in an area where an expanded hole is not desired while the drill string is rotating.
- the expandable reamer apparatus 100 may include tungsten carbide nozzles 110 as shown in FIG. 9.
- the nozzles 110 are provided to cool and clean the cutting elements 104 and clear debris from blades 101 during drilling.
- the nozzles 110 may include an O-ring seal 140 between each nozzle 110 and the tubular body 108 to provide a seal between the two components.
- the nozzles 110 are configured to direct drilling fluid towards the blades 101 in the down-hole direction 157, but may be configured to direct fluid laterally or in the uphole direction 159.
- the downhole apparatus, or expandable reaming apparatus, 100 having a restriction element trap 200 is now described in terms of its operational aspects. Reference may be made to FIGS. 7-13, in particular, and optionally to FIGS.
- the expandable reamer apparatus 100 may be installed in a bottomhole assembly above a pilot bit and, if included, above or below the measurement while drilling (MWD) device. Before “triggering" the expandable reamer apparatus 100, the expandable reamer apparatus 100 is maintained in an initial, retracted position as shown in FIG. 7. For instance, the traveling sleeve 128 within the expandable reamer apparatus 100 isolates the fluid flow path and prevents inadvertent extension of blades 101, as previously described, or activation and actuation of other operations components and is retained by the shear assembly 150 with shear screws 127 secured to the uplock sleeve 124 which is attached to the tubular body 108.
- MWD measurement while drilling
- the traveling sleeve 128 While the traveling sleeve 128 is held in the initial position, the blade actuating means is prevented from directly actuating the blades 101 whether acted upon by biasing forces or hydraulic forces.
- the traveling sleeve 128 has, on its lower end, an enlarged end piece, the seat stop sleeve 130.
- This larger diameter seat stop sleeve 130 holds the dogs 166 of the lowlock sleeve 117 in a secured position, preventing the push sleeve 115 from moving upward under affects of differential pressure and activating the blades 101.
- the latch dogs 166 lock the latch or expandable detent 168 into a groove 167 in the inner bore 151 of the tubular body 108.
- drilling fluid flow is momentarily ceased, if required, and a ball 147, or other fluid restricting restriction element, is dropped into the drill string and pumping of drilling fluid resumed.
- the ball 147 moves in the down-hole direction 157 under the influence of gravity and/or the flow of the drilling fluid, as shown in FIG. 8.
- the ball 147 reaches the restriction element trap 200 and is forced therein by the influence of the hydraulic fluid until the ball 147 is retained by an annular portion 197 of the ball trap sleeve 129 yielding within the enlarged bore 196 of the inner bore 194 of the traveling sleeve 128 and sealed against the seat portion 195 of the plug 131 as described herein and shown in FIG. 9.
- the ball 147 upon being seated into the restriction element trap 200 interrupts drilling fluid flow and causes pressure to build above it in the drill string.
- the ball may be pushed through a substantial narrower portion of the ball trap sleeve 129 until being positively located in its annular portion 197 corresponding with the enlarged bore 196 in order to securely seat the ball 147 into or against the plug 131.
- a predetermined pressure level set by the number and individual shear strengths of the shear screws 127 (made of brass or other suitable material) installed initially in the expandable reamer apparatus 100, the shear screws 127 will fail in the shear assembly 150 and allow the traveling sleeve 128 to unseal and move downward.
- the lowlock sleeve 117 is attached to the pressure-activated push sleeve 115 which now moves upward under fluid pressure influence as fluid is allowed to pass through the fluid ports 173 exposed as the traveling sleeve 128 moves downward.
- the push sleeve 115 is attached to the yoke 114 which is attached by pins and linkage assembly 178 to the blades 101, which are now moved upwardly by the push sleeve 115.
- the blades 101 In moving upward, the blades 101 each follow a ramp or track 148 to which they are mounted, via the groove 179 (shown in FIG. 2), for example.
- the stroke of the blades 101 is stopped in the fully extended position by upper hard faced pads on the stabilizer block 105, for example. With the blades 101 in the extended position, reaming a bore hole may commence.
- the lower and mid hard face pads 106, 107 help to stabilize the tubular body 108 as the cutters 104 of the blades 101 ream a larger borehole and the upper hard face pads 105 also help to stabilize the top of the expandable reamer 100 when the blades 101, 102 and 103 are in the retracted position.
- traveling sleeve 128 with the ball 147 moves downward, it comes to a stop with the flow bypass or fluid ports 173 located above the ball 147 in the traveling sleeve 128 exiting against the inside wall 184 of the hard faced protect sleeve 121, which helps to prevent or minimize erosion damage from drilling fluid flow impinging thereupon.
- the drilling fluid flow may then continue down the bottomhole assembly, and the upper end of the traveling sleeve 128 becomes "trapped," i.e., locked, between the ears 163 of the uplock sleeve 124 and the shock absorbing member 125 of the seal sleeve 126 and the lower end of the traveling sleeve 128 is laterally stabilized by the stabilizer sleeve 122.
- the spring 116 will help drive the lowlock sleeve 117 and the push sleeve 115 with the attached blades 101 back downwardly and inwardly substantially to their original or initial position into the retracted position, see FIG. 13.
- the traveling sleeve 128 has moved to a downward locked position, the larger diameter seat stop sleeve 130 will no longer hold the dogs 166 out and in the groove 167 and thus the latch or lowlock sleeve 117 stays unlatched and subjected to pressure differentials for subsequent operation or activation of the push sleeve 115 or other operational components of the downhole apparatus.
- the push sleeve 115 with the yoke 114 and blades 101 may move upward with the blades 101 following the ramps or tracks 148 to again cut/ream the prescribed larger diameter in a bore hole.
- drilling fluid flow is stopped, i.e. the differential pressure falls below the restoring force of the spring 116, the blades 101 retract, as described above, via the spring 116.
- the restriction element trap 200 provides a positive and robust retention of a restriction element 147 within a downhole tool such as an expandable reamer apparatus 100. Furthermore, the restriction element trap 200 provide for determinate retention of a restriction element 147 within an actuation element, such as the traveling sleeve 128, during or prior to its release within the downhole tool. Moreover, the restriction element trap 200 provides positive retention of a restriction element 147 without necessitating dynamically movable parts which is felt by some to potentially cause premature actuation or render captioning of the restriction element in an indeterminate or unknown state.
- the expandable reamer apparatus 100 may include a lower saver sub 109 shown in FIGS. 1 and 2 that connects to the lower box connection of the reamer body 108. Allowing the body 108 to be a single piece design, the saver sub 109 enables the connection between the two to be stronger (has higher makeup torque) than a conventional two piece tool having an upper and a lower connection.
- the saver sub 109 although is not required, provides for more efficient connection to other downhole equipment or tools.
- the shear screws 127 of the shear assembly 150, retaining the traveling sleeve 128 and the uplock sleeve 124 in the initial position, are used to provide or create a trigger, releasing when pressure builds to a predetermined value.
- the predetermined value at which the shear screws shear under drilling fluid pressure within expandable reamer apparatus 100 may be 70 Kg/cm, for example, or even 140 Kg/cm. It is recognized that the pressure may range to a greater or lesser extent than presented herein to trigger the expandable reamer apparatus 100. Optionally, it is recognized that a greater pressure at which the shear screws 127 shears may be provided to allow the spring element 116 to be conditionally configured and biased to a greater extent in order to further provide desired assurance of blade retraction upon release of hydraulic fluid.
- the restriction element trap 200 may retentively receive a restriction element, such as a ball 147, with a pressure substantially less than pressure required for releasing the shear assembly 150 while conditionally providing retention of the restriction element to pressures greatly exceeding the pressure required for releasing the shear assembly 150. Furthermore, the restriction element trap 200 provides for retaining a restriction element under reverse pressure conditions. It is recognized the restriction element trap 200 may be configured for retentively receiving a restriction element for differing hydraulic pressure requirements, and may be configured to have retention characteristics chosen in relationship to a shear assembly 150 of an actuation element, such as a traveling sleeve 128.
- the restriction element trap 200 within an actuation element may retentively receive a restriction element in order to cause activation of the actuation element by hydraulic fluid pressure in response to occlusion of a flow path therethrough, allowing the actuation element to be displaced in an axial downhole direction and thereafter exposing an operational component to a diverted hydraulic fluid in order to actuate the operational component in an axial upward direction, an axial downward direction, a laterally outward direction or other direction.
- the actuation element may shield an operational component from hydraulic fluid pressure or premature operation until a restriction element is positively retained and the actuation element has been displaced.
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- Environmental & Geological Engineering (AREA)
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US11/949,405 US8657039B2 (en) | 2006-12-04 | 2007-12-03 | Restriction element trap for use with an actuation element of a downhole apparatus and method of use |
EP07862472.3A EP2094934B1 (en) | 2006-12-04 | 2007-12-04 | Expandable reamer apparatus with restriction element trap and actuation element and method of activating |
CA2671444A CA2671444C (en) | 2006-12-04 | 2007-12-04 | Restriction element trap for use with and actuation element of a downhole apparatus and method of use |
RU2009125442/03A RU2451152C2 (en) | 2006-12-04 | 2007-12-04 | Locking device of limiter to be used with drive element of actuating device, and its application method |
PCT/US2007/024795 WO2008070051A2 (en) | 2006-12-04 | 2007-12-04 | Restriction element trap for use with and actuation element of a downhole apparatus and method of use |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US87274406P | 2006-12-04 | 2006-12-04 | |
US60/872,744 | 2006-12-04 | ||
PCT/US2007/024795 WO2008070051A2 (en) | 2006-12-04 | 2007-12-04 | Restriction element trap for use with and actuation element of a downhole apparatus and method of use |
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WO2008070051A2 true WO2008070051A2 (en) | 2008-06-12 |
WO2008070051A3 WO2008070051A3 (en) | 2008-08-21 |
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PCT/US2007/024795 WO2008070051A2 (en) | 2006-12-04 | 2007-12-04 | Restriction element trap for use with and actuation element of a downhole apparatus and method of use |
Country Status (5)
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US (1) | US8657039B2 (en) |
EP (1) | EP2094934B1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
US20080128169A1 (en) | 2008-06-05 |
US8657039B2 (en) | 2014-02-25 |
EP2094934B1 (en) | 2021-10-06 |
WO2008070051B1 (en) | 2008-10-16 |
EP2094934A2 (en) | 2009-09-02 |
RU2451152C2 (en) | 2012-05-20 |
CA2671444A1 (en) | 2008-06-12 |
WO2008070051A3 (en) | 2008-08-21 |
CA2671444C (en) | 2013-06-18 |
RU2009125442A (en) | 2011-01-20 |
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