EP3390759A1 - Force stacking assembly for use with a subterranean excavating system - Google Patents
Force stacking assembly for use with a subterranean excavating systemInfo
- Publication number
- EP3390759A1 EP3390759A1 EP16820523.5A EP16820523A EP3390759A1 EP 3390759 A1 EP3390759 A1 EP 3390759A1 EP 16820523 A EP16820523 A EP 16820523A EP 3390759 A1 EP3390759 A1 EP 3390759A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuators
- housing
- drill bit
- drill
- bit
- 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.)
- Withdrawn
Links
- 230000004044 response Effects 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 23
- 230000005611 electricity Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims 1
- 230000001186 cumulative effect Effects 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 description 27
- 238000005755 formation reaction Methods 0.000 description 22
- 239000011435 rock Substances 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 7
- 238000004891 communication Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 4
- 108700041400 F 382 Proteins 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
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- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910001329 Terfenol-D Inorganic materials 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011263 electroactive material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- ZBSCCQXBYNSKPV-UHFFFAOYSA-N oxolead;oxomagnesium;2,4,5-trioxa-1$l^{5},3$l^{5}-diniobabicyclo[1.1.1]pentane 1,3-dioxide Chemical compound [Mg]=O.[Pb]=O.[Pb]=O.[Pb]=O.O1[Nb]2(=O)O[Nb]1(=O)O2 ZBSCCQXBYNSKPV-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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- 230000002459 sustained effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/12—Electrically operated hammers
-
- 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
- E21B1/00—Percussion drilling
- E21B1/12—Percussion drilling with a reciprocating impulse member
-
- 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
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
-
- 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
- E21B6/00—Drives for drilling with combined rotary and percussive action
- E21B6/02—Drives for drilling with combined rotary and percussive action the rotation being continuous
- E21B6/04—Separate drives for percussion and rotation
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses
Definitions
- the present disclosure relates to a system for use with a borehole excavating system that employs reactive materials that selectively generate impulse forces in the excavating system.
- Hydrocarbon producing wellbores extend below the Earth's surface where they intersect subterranean formations in which hydrocarbons are trapped.
- the wellbores generally are created by drill bits that are on the end of a drill string, where typically a drive system above the opening to the wellbore rotates the drill string and bit. Cutting elements on the drill bit scrape or otherwise impact the bottom of the wellbore as the bit is rotated and excavate material from the formation thereby deepening the wellbore.
- Drilling fluid is typically pumped down the drill string and discharged from the drill bit into the wellbore. The drilling fluid flows back up the wellbore in an annulus between the drill string and walls of the wellbore. Cuttings produced while excavating are carried up the wellbore with the circulating drilling fluid.
- cutters or teeth formed on the cutting surfaces of the drilling bits impart forces onto the subterranean formation.
- the forces include shear forces generated by rotation of the drill bit with respect to the bottom of the borehole. Compressional forces are also transferred between the bit and formation, where the compressional forces are from a combination of the weight of a drill string on which the bit is attached and a column of drilling fluid flowing within an axial bore in the drill string. Except when changing bits due to wear or failure, the bit remains in contact with the formation during drilling of the wellbore.
- a system for excavating within a wellbore includes a drill string, a housing having an end that couples to the drill string, actuators in the housing that are selectively extendable and that each have an end coupled with the housing, and a ram assembly having an end coupled to a drill bit, and that couples to ends of the actuators opposite from the ends of the actuators that couple with the housing, so that when the actuators are selectively extended, the drill bit selectively extends a distance from the drill string.
- each of the actuators exerts a force onto the ram assembly when selectively extended, and wherein the actuators are arranged in series in the housing such that a sum of the forces is transmitted to the ram assembly.
- the drill bit is axially displaced an amount substantially equal to the axial elongation of a one of the actuators.
- the members can optionally be made from an activatable material that elongates in response to applied electricity. Examples of activatable material include piezoelectric material, a magnetorestrictive material, and combinations thereof.
- the bit is made up of an outer bit having an axial bore, and an inner bit that reciprocates within the axial bore in response to the actuators being changed into the activated state.
- the actuators can be axially elongated when selectively activated.
- the housing can hollow with bulkheads formed in the housing at axially spaced apart locations, and wherein outer peripheries of each of the bulkheads couple with an inner surface of sidewalls of the housing. In this example, the ends of the actuators that couple with the housing are in abutting contact with the bulkheads.
- planar radial walls are provided inside of ram assembly, and that extend in a direction transverse to an axis of the ram assembly, and wherein ends of the actuators that couple with the ram assembly abut the radial walls.
- the ram member coaxially moves within the housing when the actuators are selectively extended.
- Also disclosed herein is a method of excavating within a wellbore and that includes rotating a drill string in the wellbore that includes drill pipe, a drill bit coupled to the drill pipe, and actuators disposed between the drill pipe and drill bit, generating actuating forces with the actuators by selectively elongating each of the actuators a designated distance, and imparting a summation of the actuating forces against the drill bit to urge at least a portion of the drill bit away from the drill pipe an urged distance that is substantially the same as the designated distance.
- the actuators can be elongated at a resonant frequency, such as a resonant frequency of the drill string, or a resonant frequency of a formation that surrounds the wellbore. Selectively elongating each of the actuators a designated distance can involve directing electricity to a magnetorestrictive member disposed in the actuator that axially expands and generates a one of the axial forces.
- the portion of the drill bit urged away from the drill pipe can be an inner bit that is proximate an axis of the drill bit.
- At least a portion of the drill bit is all of the drill bit, and when at least a portion of the drill bit is urged away from the drill pipe the urged distance, the drill bit is urged into excavating contact with a bottom of the wellbore.
- a system for excavating within a wellbore includes a bottom hole assembly that selectively couples to a drill string, actuators in the bottom hole assembly that are selectively extendable a designated distance and that each exert a force when extended, a drill bit coupled with the bottom hole assembly, and a means for transferring the combined forces exerted by the actuators to the drill bit, and urging the drill bit a distance away from the drill string that is substantially the same as the designated distance.
- the actuators can include members made up of material that is responsive to an application of electricity.
- the bottom hole assembly can further include a housing that is coupled with the drill string, and wherein members are arranged in series in the housing, and ends of each of the members are coupled with the housing.
- the bottom hole assembly includes a ram assembly that couples to the drill bit, and wherein ends of the members opposite from the ends that couple with the housing couple to the ram assembly, so that when the members expand, the ram assembly is urged axially a distance that is substantially the same.
- Figure 1 is a sectional view of an example of a drilling system having actuators for delivering an axial force to a drill bit.
- Figure 2 is a sectional view of an alternate example of the drilling system of Figure 1.
- Figure 3 is an axial view of an example of the drilling system taken along lines 3-3 of Figure 1.
- Figures 4A and 4B show an example of the drilling system of Figure 1 respectively in a retracted and an extended configuration.
- Figures 5A and 5B show an example of the drilling system of Figure 2 respectively in a retracted and an extended configuration.
- FIG. 1 Shown in a side sectional view in Figure 1 is one example of a drilling system 10 for use in forming a wellbore 12.
- wellbore 12 intersects formation 14, and a wellbore wall 15 is defined at the intersection of wellbore 12 and formation 14.
- a drill string 16 is shown projecting into wellbore 12 and which is rotated by a rotary table 18 on surface. Sections of drill pipe 20 may be added on top of drill string 16 with use of a derrick 22 shown mounted over an opening of wellbore 12.
- a top drive (not shown) may be mounted to derrick 22 and used for rotating drill string 16 in lieu of rotary table 18.
- a bottom hole assembly (“BHA”) 24 is shown coupled to drill string 16.
- BHA 24 is made up of an elongated housing 26 that is hollow and whose outer periphery is made up of sidewalls 27 that extend along a length of the housing 26 and curve around an axis ⁇ of BHA 24.
- the outer surface of sidewalls 27 resembles a cylindrical shape.
- housing 26 Inside of housing 26 are elongate compartments 28i -n that are formed in series. The compartments 28i -n are defined between planar bulkheads 30i_ n that project radially between the sidewalls 27 of housing 26 at axially spaced apart locations.
- a ram assembly 32 is shown coaxially disposed within housing 26, and which has sidewalls 33 that define an outer lateral periphery of the ram assembly 32.
- Sidewalls 33 of the ram assembly 32 are curved around the axis ⁇ of the bottom hole assembly 24 and extend generally parallel with sidewalls 27 of housing 26. Similar to the bulkheads 30i_ n in housing 26, are planar radial walls 34i, 34 2 that extend radially between the sidewalls of the ram assembly 32 at axially spaced apart locations to form compartments 36i_n within ram assembly 32.
- BHA 24 further includes actuators 37i_ n that selectively apply a cumulative force against the housing 26, and an opposing force against ram assembly 32. More specifically, actuators 37i_ n of Figure 1 are made up of reactive members 38i_ n , that in the illustrated embodiment are disposed in housing 26. Further illustrated is that each of the reactive members 38i_ n have an end that is coupled with the housing 26 via contact with an associated bulkhead 30i_ n . Examples of the reactive members 38i_ n include things that change in size or shape. Embodiments exist where the change in size or shape is in response to applied energy, such as electricity or magnetism; or introducing a fluid to the actuators 37i_ n , such as hydraulic or pneumatic.
- Example constituents of the reactive members 38i_ n include electro- active materials, magnetostrictive materials, magneto- active materials, lead-zirconate- titanate, lead-magnesium-niobate, terfenol-D, galfenol, and combinations thereof.
- An opposing end of each of the reactive members 38i_ n couples with the ram assembly 32 via resilient members 40i_ n where each of the resilient members 40i_ n are in contact with the ram assembly 32.
- resilient member 40i abuts a drill chuck 42 shown formed on a lower end of ram assembly 32.
- ram assembly 32 and drill chuck 42 are recriprocatable with respect to the housing 26 and drill pipe 20 portion of the drill string 16.
- resilient member 4(1 ⁇ 2 mounts on radial wall 34 resilient member 40 3 mounts on radial wall 34 2
- resilient member 40 n mounts on radial wall 34 n .
- the resilient members 40i -n include springs, Belleville washers, elastomeric members, combinations thereof, and the like.
- resilient members 40i -n are not included so that the ends of the reactive members 38i -n directly contact the ram assembly 32.
- a drill bit 44 is shown mounted to drill chuck 42 on an end of drill chuck 42 that is opposite from its connection to ram assembly 32.
- Drill bit 44 is equipped with cutters 46 on its cutting face for excavating wellbore 12.
- a controller 48 which connects to a communication means 49 for communicating signals and/or electrical power to the reactive members 38i -n .
- reactive members 38i -n respond to applied electrical energy (such as that provided from controller 48 via communication means 49) by elongating, which imparts a force against the housing 26, and another force against ram assembly 32 that is in a direction opposite to the force applied to the housing 26.
- controller 48 includes a power supply (not shown) from which electricity is selectively provided to reactive members 38i -n .
- a dedicated power supply 50 is shown with an output line connecting to communication means 49 and through which electricity is routed downhole.
- An interface 51 between the controller 48 and power supply 50 provides communication from controller 48 to power supply 50 for providing electricity to communication means 49.
- ram assembly 32 is axially movable with respect to housing 26, so that the oppositely directed forces applied by the reactive members 38i -n to the housing 26 and ram assembly 32 causes ram assembly 32 to move axially with respect to housing 26.
- the applied forces of the reactive members 38i -n axially urges the ram assembly 32, thereby axially moving drill chuck 42 and drill bit 44 in a direction away from drill string 16 and towards the bottom of the wellbore 12. Further, the axial movement of the drill bit 44 is with respect to the rest of the drill string 16, increases the force exerted by the drill bit 44 against the bottom of wellbore 12 to above that of the weight on bit.
- controller 48 energizes actuators 37i_ n at designated intervals of time, and at designated durations of time, so that the frequency at which the bit 44 strikes the bottom of the wellbore 12 is at a designated frequency.
- designated frequencies are a resonant frequency of the drilling system 10, a resonant frequency of the rock making up the formation 14, or a combination thereof.
- Resonance is a phenomenon seen by some cyclical systems, whereby energy from one cycle is stored by the system and used in the next cycle.
- recycling of energy between cycles allows for a greater impact force of the percussive elements than could be achieved for a non-resonant percussive system using the same energy input. It is well within the capabilities of one skilled in the art to operate controller 48 so that the actuators 37i_ n are energized at the designated time intervals and durations so the bit 44 strikes the bottom of the wellbore 12 at the designated frequency.
- the high frequency vibration imparted against the formation 14 creates a series of impacts that cause compressive failure of the formation 14 under load, which is in addition to the shear failure caused by rotating the bit 44 while in contact with the formation 14.
- Tuning the frequency of vibration of the drilling system 10 to a resonance mode increases drilling efficiency above that of operating at a range of different frequencies, or by rotating the drill string 16 alone.
- the axial displacement of the bit 44 due to the cumulative axial displacement of the actuators 37i_ n , is substantially the same as if the actuators 37i_ n are in parallel.
- the Young's modulus of the rock making up the formation 14 can be inferred from the frequency of vibration of the BHA 24, as the stiffness of the rock will have an effect on the resonant frequency of the system 10.
- uie uniaxial compressive strength of a rock is defined as the value of the peak stress sustained by a rock specimen subjected to failure by uniaxial compression. It is the maximum load supported by the specimen during the test divided by the effective contact area subjected to the compression. Thus the compressive strength of the rock;
- a e is the effective area, which in an example is assumed to be about 5% of the area of the hole drilled.
- the period of the impact, x, in the above expression can be determined by many factors including the material properties of the formation 14 and the bottom hole assembly 24, other factors include the frequency of impacts.
- Equation 5 provides a lower bound estimate for the stable frequency of the oscillator.
- the use of a frequency too much greater than this lower bound frequency can generate a crack propagation zone in the formation 14 that is in front of the drill bit 44 during operation, which could lead to compromise borehole stability and reduced borehole quality.
- the oscillation frequency is too large then accelerated tool wear and failure may occur.
- a scaling/safety factor, S/ with appropriate value less than 1.0 can be applied to the frequency as a precautionary measure.
- Equation 2 The dynamic force, P rf , applied to the oscillation system can be calculated by rearranging Equation 2 and can be expressed as follows:
- D e is an effective diameter associated with effective area (A e ) of the rotary drill bit 44 which is the diameter, D, of the drill bit 44 scaled according to the fraction of the drill bit 44 which contacts the material being drilled.
- the effective diameter, D e can be defined as:
- Sc is a scaling factor corresponding to the fraction of the drill bit 44 which contacts the material being drilled. For example, estimating that only 5% of the drill bit surface is in contact with the material being drilled, .
- An appropriate value of scaling/safety factor can be introduced to the dynamic force, , according to the material being drilled so as to ensure that the crack propagation zone does not extend too far from the drill bit 44, and consequently compromising borehole stability and reducing the borehole quality.
- FIG. 2 shown in a side sectional view is an alternate example of a drilling system 10A used in forming a wellbore 12A in a formation 14A.
- the drilling system 10A includes many of the same elements of the drilling system 10 of Figure 1 , that is, a drill string 16A in the wellbore 12 A, a rotary table 18 A, drill pipe 20 A, a derrick 22A, a BHA 24A having a housing 26A, and sidewalls 27A on the housing 26A. Further making up the BHA 24A are compartments 28Ai_ n in the housing 26A, and bulkheads 30Ai_ n at opposing axial ends of the compartments 28Ai_ n .
- a generally cylindrically shaped ram assembly 32A is coaxially disposed in the housing 26A having axial sidewalls 33A and radial walls 34Ai_ n that are transversely mounted within sidewalls 33A.
- Axially between the radial walls 34Ai_ n are compartments 36Ai_ n in which actuators 37Ai_ n are provided and that include reactive members 38A ! _ n .
- Resilient members 40A ! _ n provided in the compartments 36A ! _ n exert a biasing force against reactive members 38Ai_ n .
- bit 44A is made up of a main bit 52A having an axial bore 54A extending therethrough.
- An inner bit 56A is included with the main bit 52 A that reciprocates within bore 54 A.
- the inner bit 56A has an upstream end that attaches to a lower end of ram assembly 32A via a connecting rod 58A.
- actuating the reactive members 38Ai, 38A 2 , . . ., 38A n generates a resultant force in ram assembly 32 A which transfers only to inner bit 56A to reciprocate it within the main bit 52 A.
- main bit 52A is shown mounted to a lower end of housing 26A.
- main bit 52A does not axially reciprocate in response to operation of actuators 37Ai_ n and thus generally maintains its axial distance from the lower end of drill string 16A. Instead, main bit 52A is limited to rotation within wellbore 12A, much like a standard drill bit. Further, cutters 60A, 62 A are shown respectively formed on the downhole ends of inner bit of 56A and outer or main bit 52A. In bits that rotate about their axes, the radial speed of the bit, and thus the cutters on the bit, becomes lower with proximity to the bit axis.
- FIG. 3 is an axial sectional view of an example of the BHA 24 taken along lines 3-3 of Figure 1.
- a coil 64 is shown between ram assembly 32 and reactive member 381.
- selectively energizing the coil 64 with electricity generates an electrical field that as explained above axially elongates the reactive member 381.
- Electricity for energizing the coil 64 can be from surface, such as from controller 48 or power supply 50 ( Figure 1), from a battery (not shown) included with the bottom hole assembly 24, or from a downhole generator (not shown) that converts fluid flow to electricity.
- reactive member 38i coaxially inserts into a sleeve 66 that can provide protection/isolation for the reactive member 38i.
- annular spaces 70 are defined in the circumferential spaces between adjacent supports 68 and the radial spaces between the ram assembly 32 and housing 26.
- drilling fluid flows downhole within the annular spaces 70, and back uphole within an annulus 72 between the outer surface of the housing 26 and walls of the wellbore 12.
- Figures 4A and 4B provide in a side sectional view an example of how the drill bit 44 of the drilling system 10 reciprocatingly contacts the bottom 74 of the wellbore 12, thereby creating fractures in the formation 14.
- the drill string 16 of the drilling system 10 is disposed in the wellbore 12 in a retracted mode so that the bit 44 is spaced away from a bottom 74 of the wellbore 12.
- the members 38i -n are in an unelongated state.
- the members 38i -n are magnetostrictive material, the members 38i -n are not energized and electricity from controller 48 or power supply 50 is not being transmitted to the members 38i -n .
- the members 38i -n are depicted in an elongated state.
- the elongation can be due to applied electricity, such as from controller 48A or power source 50.
- the members 381, 382, 383, and 38 n have elongated over their lengths shown in Figure 4A by the respective distances Di, D2, D3, and D n .
- the bit 44 has moved a distance DBIT in the wellbore 12.
- the movement of the bit 44 is in response to movement of the members 38i -n via the coupling between the members 38i -n and ram assembly 32 ( Figure 1).
- the distances Di, D2, D3, and D n (that can be referred to as designated distances) all have substantially the same value.
- distance DBIT has a value that is substantially the same as the value of any one of distances Di, D2, D3, and D n . Accordingly, in this example, the novel configuration of the housing 26 and ram assembly 32 results in the distance DBIT not being a sum of the individual distances Di, D2, D3, and D n .
- FIG. 4B Further illustrated in Figure 4B are arrows that respectively represent forces F38i, F382, F383, and F38 4 generated by the members 38i -n when being actuated/elongated.
- Another arrow represents force FBIT which is the force being transmitted to drill bit 44 from elongation of the members 38i -n , and which is substantially equal to a summation of forces F38i, F382, F383, and F38 4 .
- ends of the members 38i -n couple with the housing 26, and opposing ends of the members 38i -n couple with the ram assembly 32.
- the ram assembly 32, the attached drill chuck 42, and drill bit 44 are moved away from the housing 26 and drill pipe 20 by elongating the members 38i -n .
- Strategically coupling the members 38i -n with the ram assembly 32 via the radial walls 34i_ n and housing 26 via the bulkheads 30i -n allows for reciprocation of the drill bit 44 a distance substantially the same as the elongation of individual members 38i -n while also exerting a cumulative force onto drill bit 44 so that its reciprocating force FBIT is substantially the same as the sum of forces F38i, F382, F383, and F38 4 .
- An advantage of reciprocating the drill bit 44, while also rotating the drill bit 44, is that when the drill bit 44 is reciprocatingly thrust against the bottom 74 of the wellbore 12, fractures 76 are formed in the formation 14 adjacent the bottom 74 of the wellbore 12.
- the fractures 76 can reduce inherent stresses in the formation 14, which increases the amount of rock removed with each rotation of the drill bit 44, that in turn increases rate of penetration of the drilling operation.
- Figures 5A and 5B show in a side sectional view an example of reciprocating motion of the drill bit 44 A of Figure 2.
- the drill string 16A is in the retracted configuration with the members 38Ai_ n in an unelongated state.
- the inner bit 56A is spaced upward from the bottom 74A of the wellbore 12A with its cutters 60A out of contact with the bottom 74A, while the main bit 52A is at the bottom 74A of the wellbore 12A and its cutters 62A in rotating contact with the bottom 74A.
- members 38Ai_ n include magnetostrictive material
- the members 38Ai_ n are not energized and electricity from controller 48A or power supply 50A is not being transmitted to the members 38A ! _ n .
- the members 38Ai_ n are depicted in an elongated state.
- the elongation can be due to applied electricity, such as from controller 48A or power supply 50A.
- the members 38Ai, 38A2, 38A3, and 38A n have lengthened over that of their lengths in Figure 5 A by the respective distances D IA, D2A, D3A, and D N A. Further illustrated is that the inner bit 56A has moved a distance DBITA with respect to the main bit 52A.
- the main bit 52A is coupled with the housing 26A by a threaded connection 78A, and unlike the inner bit 56A, the main bit 52A does not reciprocate with movement of the ram assembly 32A.
- the movement of the inner bit 56A is in response to movement of the members 38Ai_ n via the coupling between the members 38Ai_ n and ram assembly 32A ( Figure 2).
- the distances DIA, I3 ⁇ 4A, D3A, and D ⁇ (that can be referred to as designated distances) all have substantially the same value.
- distance DBITA has a value that is substantially the same as the value of any one of distances DIA, D2A, D3A, and D N A.
- the bit 44A therefore can remain substantially effective in excavating even when the inner bit 56A is spaced away from the bottom 74A ( Figure 5A). Moreover, the main bit 52A is shown creating fractures 76A in the formation 14A adjacent the bottom 74A, which can improve the excavating efficiency of the bit 44A as a whole.
- the distances DBIT, DBITA will be substantially the same as elongation of one of the individual actuators 37i_ n , 38Ai_ n rather than a sum of their distances.
- the corresponding forces F B rr, F B ITA on the bits 44, 44A will be substantially the same as the sum of forces from the extended actuators 37i_ n , 37Ai_ n when the actuators 37i_ n , 37Ai_ n do not include the members 38i_ n , 38A ! _ n .
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562268752P | 2015-12-17 | 2015-12-17 | |
PCT/US2016/066899 WO2017106479A1 (en) | 2015-12-17 | 2016-12-15 | Force stacking assembly for use with a subterranean excavating system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3390759A1 true EP3390759A1 (en) | 2018-10-24 |
Family
ID=57708855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP16820523.5A Withdrawn EP3390759A1 (en) | 2015-12-17 | 2016-12-15 | Force stacking assembly for use with a subterranean excavating system |
Country Status (4)
Country | Link |
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US (1) | US20170175446A1 (en) |
EP (1) | EP3390759A1 (en) |
CA (1) | CA3011247A1 (en) |
WO (1) | WO2017106479A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800009304A1 (en) * | 2018-10-10 | 2020-04-10 | Nazzareno Alessandrini | ELECTRONIC DEMOLITION HAMMER WITH MECHANICAL RESONANCE. |
WO2021034337A1 (en) * | 2019-08-21 | 2021-02-25 | Landmark Graphics Corporation | Conveyance deployment systems and methods to deploy conveyances |
US11668143B2 (en) | 2019-12-10 | 2023-06-06 | Saudi Arabian Oil Company | Deploying wellbore patch for mitigating lost circulation |
US11643878B2 (en) | 2020-03-26 | 2023-05-09 | Saudi Arabian Oil Company | Deploying material to limit losses of drilling fluid in a wellbore |
US11286733B2 (en) | 2020-03-26 | 2022-03-29 | Saudi Arabian Oil Company | Deploying material to limit losses of drilling fluid in a wellbore |
US11454071B2 (en) * | 2020-03-26 | 2022-09-27 | Saudi Arabian Oil Company | Deploying material to limit losses of drilling fluid in a wellbore |
US11434708B2 (en) | 2020-06-10 | 2022-09-06 | Saudi Arabian Oil Company | Lost circulation fabric, method, and deployment systems |
US11434707B2 (en) | 2020-06-10 | 2022-09-06 | Saudi Arabian Oil Company | Lost circulation fabric, method, and deployment systems |
US11459838B2 (en) | 2020-06-10 | 2022-10-04 | Saudi Arabian Oil Company | Lost circulation fabric, method, and deployment systems |
US11624265B1 (en) | 2021-11-12 | 2023-04-11 | Saudi Arabian Oil Company | Cutting pipes in wellbores using downhole autonomous jet cutting tools |
CN114059970B (en) * | 2021-11-16 | 2022-09-16 | 吉林大学 | Bidirectional rotary multifunctional experiment platform with vibration function |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2893692A (en) * | 1955-01-03 | 1959-07-07 | Phillips Petroleum Co | Vibratory impact tool |
DE60226033D1 (en) * | 2001-06-05 | 2008-05-21 | Andergauge Ltd | drilling |
US7740088B1 (en) * | 2007-10-30 | 2010-06-22 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Ultrasonic rotary-hammer drill |
GB2473619B (en) * | 2009-09-16 | 2012-03-07 | Iti Scotland Ltd | Resonance enhanced rotary drilling |
GB2542090B (en) * | 2014-09-15 | 2020-09-16 | Halliburton Energy Services Inc | Downhole vibration for improved subterranean drilling |
-
2016
- 2016-12-13 US US15/377,339 patent/US20170175446A1/en not_active Abandoned
- 2016-12-15 EP EP16820523.5A patent/EP3390759A1/en not_active Withdrawn
- 2016-12-15 CA CA3011247A patent/CA3011247A1/en not_active Abandoned
- 2016-12-15 WO PCT/US2016/066899 patent/WO2017106479A1/en active Application Filing
Also Published As
Publication number | Publication date |
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WO2017106479A8 (en) | 2018-06-14 |
CA3011247A1 (en) | 2017-06-22 |
WO2017106479A1 (en) | 2017-06-22 |
US20170175446A1 (en) | 2017-06-22 |
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