WO2018229690A1 - Ensemble tête - Google Patents

Ensemble tête Download PDF

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Publication number
WO2018229690A1
WO2018229690A1 PCT/IB2018/054334 IB2018054334W WO2018229690A1 WO 2018229690 A1 WO2018229690 A1 WO 2018229690A1 IB 2018054334 W IB2018054334 W IB 2018054334W WO 2018229690 A1 WO2018229690 A1 WO 2018229690A1
Authority
WO
WIPO (PCT)
Prior art keywords
latch
main body
valve
head assembly
valve body
Prior art date
Application number
PCT/IB2018/054334
Other languages
English (en)
Inventor
Christopher COUTU
Sergio HUAPAYA
Original Assignee
Groupe Fordia Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Groupe Fordia Inc. filed Critical Groupe Fordia Inc.
Publication of WO2018229690A1 publication Critical patent/WO2018229690A1/fr

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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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • 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
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit

Definitions

  • This invention relates to the retrieval of core samples. More particularly, the invention relates to a head assembly for a core barrel assembly.
  • Core samples are obtained through core drilling operations.
  • Core drilling is typically conducted with a core drill comprising an outer tube assembly and an inner tube, the inner tube being secured to a head assembly to form a core barrel assembly.
  • a hollow drill bit are attached to the outer tube assembly, typically with a reamer therebetween, so that rotational torque applied to the outer tube assembly is transmitted to the drill bit.
  • a core is generated during the drilling operation, with the core progressively extending along the inner tube as drilling progresses.
  • the core within the inner tube is fractured.
  • the core barrel assembly, and the fractured core sample contained therein, are then retrieved from within the drill hole, typically by way of a retrieval cable lowered down the drill hole and attached to the inner barrel assembly with an overshot. Once the inner barrel assembly has been removed from the bore, the core sample can be removed and subjected to analysis.
  • the head assembly and inner tube are secured in position inside the outer tube assembly by the means of latches that extend substantially radially outwardly from the inner barrel barrel assembly.
  • the latches are received inside notches or grooves formed into the inner surface of the outer tube assembly and are selectively retractable for locking and unlocking the inner barrel assembly to and from the outer tube assembly.
  • currently used latches may become disengaged from the outer tube assembly during the drilling process because of vibrations and pressure changes produced during this process. A mislatch is inconvenient as the core can then no longer be retrieved. Also, in uphole drilling, a mislatch represents a danger since the core barrel assembly can come back to the driller's working area. In addition, the inner barrel assembly may be damaged if this occurs.
  • retrieval and lowering of the head assembly represents a significant portion of the time spent drilling. Since any minute spent during a drilling operation is expensive, there is a need to accelerate these operations while ensuring that they remain safe ad reliable.
  • An object of the present invention is therefore to provide an improved head assembly.
  • the invention provides a head assembly for supporting an inner tube usable to retrieve a core sample and releasably latching in a latch seat provided in an outer tube assembly of a drill string, the head assembly including: a substantially elongated main body defining a main body outer surface; substantially axially opposed main body proximal and distal ends; a main body passageway extending substantially axially therethrough between the main body proximal and distal ends; a tube attachment at the main body distal end for attaching the inner tube thereto; and a main body latch slot extending between the main body passageway and main body outer surface, the main body latch slot being substantially elongated and substantially axially extending; a latch pivotably mounted at the main body latch slot so as to be pivotable about a latch pivot axis, the latch pivot axis extending across the main body latch slot circumferentially relative to the main body, the latch being movable between a latch extended position wherein a latch radially outward
  • a head assembly further comprising a valve for selectively at least partially obstructing the axial passageway.
  • a head assembly further comprising a valve for selectively substantially obstructing the axial passageway.
  • valve includes a valve body provided in the main body passageway and defining a valve body passageway extending axially therethrough, the valve body passageway defining part of the axial passageway, the valve body defining a valve seat around the valve body passageway; a valve stop movable axially along the valve body passageway; and a stopper provided proximally relative to the valve seat and extending across the axial passageway for preventing movements of the valve stop proximally to the stopper; wherein, when the valve stop is withdrawn from the valve seat, the valve is in a valve open configuration allowing passage of fluids axially therethrough, and when the valve stop is seated on the valve seat, the valve is in a valve closed configuration substantially preventing passage of fluids therethrough.
  • valve stop is smaller than a cross-section of the axial passageway at the stopper to allow passage of fluids around the stopper when the valve stop abuts against the stopper.
  • a head assembly wherein the main body defines a main body valve aperture extending between the main body passageway and main body outer surface; the valve body defines a valve body aperture extending substantially radially therethrough from the valve body passageway; the valve body is movable between valve body proximalmost and distalmost positions wherein the valve body aperture is respectively proximal and distal relative to the main body valve aperture.
  • valve body is also movable to a valve body register position wherein the valve body aperture and the main body valve aperture are substantially in register with each other.
  • the latch actuator includes a latch piston provided distally relative to the latch, the latch piston being movable between a latch piston distalmost position and a latch piston proximalmost position, wherein, in the latch piston distalmost position, the latch piston is spaced apart from the latch so that the latch is movable between the latch extended and retracted positions, and in the latch piston proximalmost position, the latch piston engages the latch and pushes the latch to the latch extended position.
  • a head assembly wherein the latch is freely movable between the latch extended and retracted positions when the latch piston is in the latch piston distalmost position.
  • the latch piston defines a latch piston passageway extending axially therealong and defining part of the axial passageway, the latch piston being terminated proximally by a piston cam surface extending across the latch piston passageway and engaging the latch in the latch piston proximalmost position, the piston cam surface being provided with at least one cam surface aperture extending therethrough forming part of the latch piston passageway.
  • a head assembly wherein the latch is configured and sized to achieve the latch retracted position under the action of the fluids on the latch when the head assembly is lowered in a fluid column.
  • a head assembly wherein in the latch retracted position, the latch is completely withdrawn inside the main body latch slot.
  • a head assembly further comprising a spearhead point at the main body proximal end securable to an overshot.
  • a head assembly further comprising a latch collar provided in the main body passageway, the latch collar defining a collar latch slot extending radially therethrough, the latch collar being movable between latch collar proximal and distal positions, wherein, in the latch collar distal position, the collar latch slot is in register with the main body latch slot and allows movement of the latch to the latch extended position and, in the latch collar proximal position, the latch collar at least partially obstructs the main body latch slot so that the latch is constrained in the latch retracted position.
  • spear head point and the latch collar are mechanically coupled to each other so as to be jointly movable axially relative to the main body upon the spearhead point being moved proximally.
  • a head assembly further comprising a latch collar biasing element biasing the latch collar towards the latch collar distal position.
  • spearhead point is movable axially over a predetermined movement range relative to the main body, a resiliently deformable bumper being provided between spearhead point and the main body to absorb overshot landing shocks on the spearhead point.
  • a head assembly wherein the main body defines at least three main body latch slots each extending between the main body passageway and main body outer surface, each of the main body latch slots being substantially elongated and substantially axially extending and wherein a latch is pivotably mounted at each of the main body latch slots so as to be pivotable about a respective latch pivot axis, each latch pivot axis extending across the respective one of the main body latch slots circumferentially relative to the main body.
  • a head assembly further comprising a valve for selectively substantially obstructing the axial passageway, the valve including a valve body provided in the main body passageway and defining a valve body passageway extending axially therethrough, the valve body passageway defining part of the axial passageway, the valve body defining a valve seat around the valve body passageway, the valve body being movable between valve body proximalmost and distalmost positions along the main body passageway; and a valve stop movable axially along the valve body passageway; wherein, when the valve stop is withdrawn from the valve seat, the valve is in a valve open configuration allowing passage of fluids axially therethrough, and when the valve stop is seated on the valve seat, the valve is in a valve closed configuration substantially preventing passage of fluids therethrough; a stopper provided proximally relative to the valve seat and extending across the axial passageway for preventing movements of the valve stop proximally further than the stopper, the valve stop and stop
  • valve body defines axially opposed valve body proximal and distal ends, the valve seat being provided at the valve body distal end.
  • a head assembly wherein, in the engaged configuration, the latch piston is maintained distal to the latch piston proximalmost position by the valve body.
  • valve body is maintained proximal to the valve body distalmost position by the latch piston.
  • a head assembly wherein, in the engaged configuration, the latch piston is maintained distal to the latch piston proximalmost position by the valve body and the valve body is maintained proximal to the valve body distalmost position by the latch piston.
  • a head assembly wherein the latch piston and valve body are configured and sized to that the disengaged configuration is achieved from the engaged configuration when a predetermined axial tension is exerted between the latch piston and valve body; and the engaged configuration is achieved from the disengaged configuration when a predetermined axial compression is exerted between the latch piston and valve body.
  • a head assembly wherein one of the latch piston and valve body defines a resiliently deformable tongue having a hook portion; and an other one of the latch piston and valve body defines a hook receiving portion for releasably receiving the hook portion; wherein, in the engaged configuration, the hook portion is received by the hook receiving portion, and, in the disengaged configuration, the hook portion is outside of the hook receiving portion; the valve body and latch piston being configured and sized so that passage between the engaged and disengaged configurations occurs through deformation of the tongue to allow movements of the hook portion and hook receiving portion relative to each other.
  • a head assembly wherein the hook receiving portion defines a flange, the hook being raised over the flange through deformation of the tongue when moving between the engaged and disengaged configurations.
  • a head assembly further comprising a latch piston biasing element biasing the latch piston towards the latch piston proximalmost position and a valve body biasing element biasing the valve body towards the valve body proximalmost position.
  • a head assembly wherein in the engaged configuration with the valve body in the valve body proximalmost position, the latch piston is disengaged from the latch.
  • a head assembly wherein in the engaged configuration with the valve body in the valve body proximalmost position, the latch piston is between the latch piston proximalmost and distalmost positions.
  • a head assembly wherein in the disengaged configuration, the latch piston is moved to the latch piston proximalmost position by the latch piston biasing element.
  • a head assembly wherein the main body defines a main body valve aperture extending between the main body passageway and main body outer surface; the valve body defines a valve body aperture extending substantially radially therethrough from the valve body passageway; the valve body aperture being respectively proximal and distal relative to the main body valve aperture in the valve body proximalmost and distalmost positions.
  • valve body aperture is in register with the latch piston so that the latch piston obstructs the valve body aperture, and, in the disengaged configuration, the latch piston is movable to be withdrawn from the valve body aperture.
  • valve body is also movable to a valve body register position wherein the valve body aperture and the main body valve aperture are substantially in register with each other.
  • a head assembly wherein the latch piston, valve body and valve stop are configured and sized so that in the engaged configuration, creating a predetermined fluid pressure differential between the main body proximal and distal ends with a higher pressure at the main body proximal end causes the valve to achieve the valve closed configuration and to exert the predetermined axial tension to cause the latch piston and valve body to achieve the disengaged configuration, thereby allowing movement of the latch piston towards the latch piston proximalmost position; causing a resistance to pumping of the fluids in a distal direction through the axial passageway.
  • a head assembly further comprising a shut off provided distally to the main body valve aperture for sealing passage of fluids between the head assembly and the outer tube assembly upon a predetermined shut off compression being exerted between the inner tube and the latch.
  • latch piston and valve body are configured and sized so that with no fluid pressure differential exerted between the main body proximal and distal ends, moving the latch to the latch retracted position causes the latch piston and valve body to enter the engaged configuration.
  • a head assembly wherein the predetermined axial tension is larger than the predetermined axial compression.
  • a head assembly wherein the main body defines a main body bypass aperture extending between the main body outer surface and the main body passageway distal to the latch piston, the head assembly further comprising a dry hole adapter mountable to the main body distal to the latch piston with the valve body removed from the head assembly, the dry hole adapter defining a dry hole adapter bypass aperture extending in register with the main body bypass aperture and a dry hole adapter passageway extending between the dry hole adapter bypass aperture and the latch piston passageway, the dry hole adapter passageway defining a neck and the dry hole adapter passageway containing an adapter biasing element distal to the neck, the neck and adapter biasing element being configured and sized so that when fluids are pumped though the dry hole adapter in a distal direction, the valve stop is maintained in the neck by the biasing element and substantially obstructs passage of fluid through the neck until a predetermined fluid pressure differential across the dry hole adapter is achieved, at which point the valve stop moves distal to the neck to
  • a head assembly wherein the main body defines a landing shoulder for abutting on the landing ring.
  • a head assembly further comprising a removable resiliently deformable seal mounted to the main body for sealing against the outer tube assembly.
  • head assembly wherein the head assembly includes a core stopper at the main body distal end, the core stopper being axially rotatable relative to the latch.
  • head assembly wherein the head assembly is configure and sized so that in operation, after throwing down the head assembly in a fluid column while pumping fluid, landing the head assembly while continuing pumping causes a persistent increase in resistance to pumping that results in a persistent increase in pressure in the fluid column.
  • the proposed head assembly is relatively easily manufacturable at a relatively low cost using known components and methods. Furthermore, the proposed head assembly is relatively robust and is therefore at relatively low risk of being damaged during operation. Yet furthermore, the proposed head assembly includes many safety features and is relatively convenient to operate due to the mechanical logic implemented therein.
  • the axial passageway accelerates descent of the head assembly in a fluid column contained in the drilling rods as the fluid can then pass inside the head assembly, instead of being limited to the small space between the head assembly and the outer tube assembly. Since this space is relatively small, a lot of resistance to the descent of the head assembly is created in this small space.
  • the latches are completely retracted inside the main body during descent. Therefore, there is no friction between the latches and the drilling rods during descent. This further decreases the friction between the head assembly and the drilling rods compared to some existing head assemblies, and reduces wear on the latches.
  • the proposed head assembly can, in some embodiments, also be used in underground operation, in which the head assembly is pushed sometimes against gravity with a fluid, or in dry holes in which a water column is not formed, or formed with difficulty, because of leaks.
  • Figure 1 in a perspective cutaway view, illustrates a head assembly in accordance with an embodiment of the present invention
  • Figure 2 in a perspective cutaway view, illustrates latches part of the head assembly of FIG. 1 and adjacent portions of the head assembly, the latches being shown in a latch extended position;
  • Figure 3 in a perspective cutaway view, illustrates the latches and adjacent portions of the head assembly of FIG. 2 , the latches being shown in a latch retracted position;
  • Figure 4 in a partially exploded view, illustrates the head assembly of FIG. 1 ;
  • Figure 5 in a side cross-sectional view, illustrates a step in the operation of the head assembly of FIGS. 1 and 4;
  • Figure 6 in a side cross-sectional view, illustrates an other step in the operation of the head assembly of FIGS. 1 and 4;
  • Figure 7 in a side cross-sectional view, illustrates yet an other step in the operation of the head assembly of FIGS. 1 and 4;
  • Figure 8 in a side cross-sectional view, illustrates yet an other step in the operation of the head assembly of FIGS. 1 and 4;
  • Figure 9 in a side cross-sectional view, illustrates yet an other step in the operation of the head assembly of FIGS. 1 and 4;
  • Figure 10 in a side cross-sectional view, illustrates yet an other step in the operation of the head assembly of FIGS. 1 and 4;
  • Figure 1 1 in a side cross-sectional view, illustrates yet an other step in the operation of the head assembly of FIGS. 1 and 4;
  • Figure 12 in a side cross-sectional view, illustrates yet an other step in the operation of the head assembly of FIGS. 1 and 4;
  • Figure 13 in a side cross-sectional view, illustrates yet an other step in the operation of the head assembly of FIGS. 1 and 4;
  • Figures 14 in a side cross-sectional view, illustrates a valve body and part of a latch piston both part of the head assembly of FIGS. 1 and 3 to 13, here shown in an engaged configuration;
  • Figure 15 in a partial perspective cut away view, illustrates the valve body and the latch piston of FIG. 14 in the engaged configuration
  • Figures 16 in a side cross-sectional view, illustrates the latch piston and valve body of FIGS. 14 and 15 in a disengaged configuration
  • Figure 17 in a partial perspective cut away view, illustrates the latch piston and valve body of FIGS. 14 to 16 in the disengaged configuration
  • Figure 18 in a side cross-sectional view, illustrates a dry hole kit usable in the head assembly of FIGS. 1 and 4 to 14;
  • Figure 19 in a side cross-sectional view, illustrates a resiliently deformable seal usable in the head assembly of FIGS. 1 and 4 to 14 for underground drilling.
  • FIG. 1 there is shown a head assembly 50 for retrieving a core sample (not shown in the drawings) in a drilling bore (not shown in the drawings).
  • the head assembly 50 is used in a drill string including an outer tube assembly 52 (only part of which is illustrated) supporting a distal drill bit (not shown in the drawings).
  • the outer tube assembly 52 may in some embodiments be a conventional outer tube assembly 52 including a locking coupling 54 secured to proximally located drill rods, an adapter coupling 56 secured to the locking coupling 54 and an outer tube 58 secured to the adapter coupling 56.
  • the outer tube assembly 52 defines a latch seat 60 in the form of a conventional shoulder adjacent the junction between the locking and adapter couplings 54 and 56 defined by a groove in the adapter coupling 56 that frees the distal end of the locking coupling 54 so that the latter can define the shoulder.
  • the latch seat 60 faces generally towards the distal end of the outer tube assembly 52.
  • the latch seat 60 is usable to firmly secure the head assembly 50 adjacent the distal end of the drilling bore during the drilling process.
  • the outer tube assembly 52 also includes an outer tube landing ring 62 distally relative to the latch seat 60 and protruding radially inwardly in the outer tube assembly 52, typically adjacent the junction between the adapter coupling 56 and outer tube 58.
  • the landing ring 62 stops the distally oriented movement of the head assembly 50 substantially adjacent the drill bit when the head assembly 50 is inserted in the outer tube assembly 52.
  • the head assembly 50 is usable with a fluid, such as a conventional drilling fluid.
  • distal and proximal refers to the distance from an operator located outside of the bore. Therefore, proximal elements are closer to the operator of the head assembly 50 than distal elements. This terminology is used to facilitate the description of the head assembly 50 and should not be used to restrict the scope of the present invention.
  • the term “axial” refers to a direction parallel to the longitudinal axis of the drill string.
  • the terminology “substantially” is used to denote variations in the thus qualified terms that have no significant effect on the principle of operation of the head assembly 50. These variations may be minor variations in design or variations due to mechanical tolerances in manufacturing and use of the head assembly 50. These variations are to be seen with the eye of the reader skilled in the art.
  • present application claims priority from US provisional patent application 62519469 filed June 14, 2017, the contents of which is hereby incorporated by reference in its entirety.
  • the head assembly 50 includes a main body 64, one or more latch 2 and a latch actuator 74.
  • the head assembly 50 is usable with a conventional overshot 40, partially shown in FIG. 12.
  • the latch actuator 74 and latch 2 are mounted to the main body 64.
  • the latch actuator 74 is operatively coupled to the latch 2 for selectively moving the latch from a latch retracted position to a latch extended position, as detailed hereinbelow.
  • the main body 64 typically has a generally elongated cylindrical configuration and is sized so as to substantially fill the portion of the outer tube assembly 52 where the head assembly 50 is located.
  • the main body 64 defines a main body outer surface 48, which is typically of generally cylindrical configuration.
  • the main body 64 also defines substantially axially opposed main body proximal and distal ends 66 and 68 and a main body passageway 70 extending substantially axially therethrough between the main body proximal and distal ends 66 and 68.
  • the main body 64 may be manufactured in a single block of material.
  • the main body 64 is manufactured using many segments that are secured to each other using threads, nuts 10 and 37 and spindle shaft 16, for example main body first, second, third, fourth and fifth segments 1 , 3, 12, 5 and 17.
  • the use of many segments facilitates manufacturing, assembly, maintenance and repair of the head assembly 50 and is known in the art.
  • the coupling between the main body first, second, third, fourth and fifth segments 1 , 3, 12, 5 and 17 is therefore known in the art and not further described.
  • the main body fifth segment 17, to which an inner tube 39 (seen in FIG. 10) is attachable, may rotate in some embodiments relative to the remainder of the main body 64, for example on the spindle shaft 16 through bearing 15.
  • Grease may be applied to the interior of the head assembly 50 using a grease fitting 9 removable to reveal an aperture leading into the head assembly 50.
  • the main body 64 defines a landing shoulder 4 for abutting on the landing ring 62 when the landing ring 62 is reached.
  • the head assembly defines an axial passageway 84 (seen for example in FIGS. 5 to 13) extending therealong between the main body distal and proximal ends 68 and 66 to allow fluids to move through the axial passageway 84 between the main body distal and proximal ends 68 and 66 with the fluids remaining inside the head assembly 50.
  • fluids can enter the head assembly 50 at the main body distal end 68, and through a path that extends through the whole head assembly 50 only, for example through the center thereof, and exit at the main body proximal end 86. Therefore, when the head assembly 50 is lowered in a fluid column, for example contained in drilling rods, the fluids don't have to go only through the relatively tight space between the head assembly 50 and the drilling rods, but may also go through the center of the head assembly 50, which allows the head assembly 50 to be lowered faster in the fluid column.
  • the axial passageway 84 does not need to be straight and completely unobstructed. However, there needs to be a straight or more or less direct path through the head assembly 50 that allows passage of the fluids, even though.
  • the head assembly 50 further includes a valve 82 for selectively at least partially obstructing the axial passageway 84.
  • the valve 82 is provided for selectively substantially obstructing the axial passageway.
  • substantially obstructing means that fluids cannot flow through the valve 82 in large quantities, but that there can be relatively small leaks, due for example to manufacturing imperfections or to wear in the valve 82. However, these small leaks are not sufficient to alter the manner in which the head assembly 50 operates, as described below.
  • the main body passageway 70 has a generally cylindrical configuration and receives thereinto the latch actuator 78, valve 82 and latches 2.
  • the main body passageway 70, and correspondingly the latch actuator 78 and valve 82 are not necessarily of uniform transversal cross-sectional configuration longitudinally therealong as shoulders, described in further details hereinbelow, are defined therein to limit movements of some components of the head assembly 50 in the main body passageway 70.
  • a tube attachment 71 is provided at the main body distal end 68 for attaching the inner tube 39 thereto.
  • the tube attachment 71 takes the form of an internal thread to which the inner tube 39 can be screwed.
  • At least one main body latch slot 72 extends between the main body passageway 70 and the body outer surface 12.
  • more than one main body latch slot 72 is provided, for example, 2, 3 or 4 body latch slots.
  • the main body latch slots may for example be equidistantly spaced apart from each other around a circumference of the main body 64.
  • Each of the main body latch slots 72 is substantially elongated and substantially axially extending.
  • a latch 2 is pivotably mounted at each of the main body latch slots 72 so as to be pivotable about a latch pivot axis 75.
  • the latch pivot axis extends across the main body latch slot 72 circumferentially relative to the main body 64, each latch 2 being movable between a latch extended position (seen for example in FIG. 2) wherein a latch radially outwardmost portion 76 of the latch 2 protrudes radially outwardly from the main body 64 and a latch retracted position (seen for example in FIG. 3) wherein the latch radially outwardmost portion 76 is radially inwardly located relative to a position of the latch radially outwardmost portion 76 in the latch extended position.
  • the latches 2 are completely withdrawn inside the main body latch slots 72.
  • the latches 2 may slightly protrude from the main body 64 in the latch retracted position.
  • the configuration of the mechanism that is used to move latches 2 received in the latch slots 72 allows for the use of more than 2 latches and corresponding main body latch slots 72, for example at least three latches 2 and main body latch slots 72. This is in contrast to many existing similar mechanisms that can only accommodate two latches because of their configuration and actuation mechanism. Having more than 2 latches may be advantageous as it allows to better spread the relatively large loads supported by the latches 2 between a larger number of latches 2, and may, in some embodiments, increase locking coupling 54 life.
  • the latches 2 are substantially freely movable between the latch extended and retracted positions when a latch piston 32 part of the latch actuator 78 and further described hereinbelow is in a latch piston distalmost position. In this position, the latch piston 32 is spaced apart from the latches 2 and in opposition to some existing head assemblies, no biasing element is present to bias the latches 2 to either the latch extended or retracted positions. In some embodiments, retraction at throwdown is achieved through the interaction between the latches 2 and the fluid column, as described below.
  • the latch actuator 78 includes a latch piston 32 provided distally relative to the latches 2.
  • the latch piston 32 defines latch piston proximal and distal ends 90 and 93.
  • the latch piston 78 is movable between a latch piston distalmost position (seen for example in FIG. 6) and a latch piston proximalmost position (seen for example in FIG. 7).
  • the latch piston 32 In the latch piston distalmost position, the latch piston 32 is spaced apart from the latches 2 so that the latches 2 are movable between the latch extended and retracted positions.
  • the latch piston 32 engages the latches 2 and pushes the latches 2 to the latch extended position.
  • the latch piston 32 defines a latch piston passageway 88 (seen in FIGS. 5 to 13 for example) extending axially therealong and defining part of the axial passageway 84.
  • the latch piston 32 is terminated proximally by a piston cam surface 92 extending across the latch piston passageway 88 and engaging the latches 2 in the latch piston proximalmost position.
  • the piston cam surface 92 is provided with at least one cam surface aperture 94 extending therethrough forming part of the latch piston passageway 88.
  • the latch piston 32 defines a distally facing latch piston shoulder 96 and the main body 64 defines a proximally facing main body piston shoulder 98.
  • a latch piston biasing element 1 1 for example a coil spring, is provided between the latch piston shoulder 96 and the main body piston shoulder 98 and biases the latch piston 32 towards the latch piston proximalmost position. When the latch piston biasing element 1 1 is fully compressed, the latch piston is in the latch piston distalmost position.
  • the latch piston 32 also defines a hook receiving portion 104, the purpose of which is further explained hereinbelow.
  • the hook receiving portion 1 04 includes an annular flange 1 06 extending around the outer surface of the latch piston 32.
  • the valve 82 includes a valve body 6 provided in the main body passageway 70 and defining a valve body passageway 108 extending axially therethrough, the valve body passageway 108 defining part of the axial passageway 84.
  • the valve body 6 defines a distally located valve seat 1 10 around the valve body passageway 108, defining for example an annular restriction inside the valve body passageway 108.
  • the valve body 6 defines axially opposed valve body proximal and distal ends 85 and 87.
  • the valve seat 1 10 is provided at the valve body distal end 87.
  • a valve stop 8 for example a ball, is movable axially along the valve body passageway 108.
  • a stopper 1 12, seen for example in FIGS. 5 to 13 is provided proximally relative to the valve seat 1 1 0 and extends across the axial passageway 84 for preventing movements of the valve stop 8 proximally to the stopper 1 12.
  • the stopper 1 12 takes the form of a pin extending diametrically across the latch piston passageway 88.
  • the stopper 1 12 includes a proximal wall of the latch piston 32 that is configured to allow flow of fluids around the valve stop 8 through the cam surface apertures 94 when the valve stop 8 abuts against the latch proximal wall.
  • Other suitable stoppers are also within the scope of the invention.
  • valve 82 When the valve stop 8 is withdrawn from the valve seat 1 10, the valve 82 is in a valve open configuration allowing passage of fluids axially therethrough. When the valve stop 8 is seated on the valve seat 1 10, the valve 82 is in a valve closed configuration substantially preventing passage of fluids therethrough.
  • the valve stop 8 and stopper 1 12 are configured and sized for allowing passage of fluids around the valve stop 8 when the valve stop 8 abuts against the stopper 1 12.
  • the valve stop 8 is smaller than a cross-section of the axial passageway 84 at the stopper 1 12 to allow passage of fluids around the valve stop 8 when the valve stop 8 abuts against the stopper 1 12. Therefore, the valve 82 controls flow of fluids through the axial passageway 84.
  • the valve 82 also controls flows of fluids laterally between inside and outside the main body 64 when fluids flow distally.
  • the main body 64 defines a main body valve aperture 1 14 extending between the main body passageway 70 and main body outer surface 48.
  • the valve body 6 defines a valve body aperture 1 16 extending substantially radially therethrough from the valve body passageway 108 (not shown in FIG. 1 ). It should be noted that typically, many main body valve apertures 1 14 and valve body apertures 1 16 are provided, distributed circumferentially around the valve 82. and configured to never block out due to misalignment between the main body valve apertures 1 14 and valve body apertures 1 16 if the valve body 6 rotates on its axis.
  • valve body 6 is movable between valve body proximalmost and distalmost positions (seen respectively in FIGS. 5 and 6 for example) wherein the valve body aperture 1 16 is respectively proximal and distal relative to the main body valve aperture 1 14.
  • the valve body 6 is also movable to a valve body register position (seen in FIG. 9) wherein the valve body aperture 1 16 and the main body valve aperture 1 14 are substantially in register with each other.
  • the main body 64 defines a main body first valve shoulder 120 facing generally distally and the valve body 6 defines a valve body flange 122 protruding radially outwardly therefrom.
  • the main body 64 also defines a main body second valve shoulder 128 facing generally proximally, and located distally relative to the main body first valve shoulder 120.
  • the valve body flange 122 abuts against the main body first valve shoulder 120, which prevents further proximal movements of the valve body 6.
  • the valve body flange 122 abuts against the main body second valve shoulder 128, which prevents further distal movements of the valve body 6.
  • valve body biasing element 34 biases the valve body 6 towards the valve body proximalmost position.
  • the valve body biasing element 34 is provided between a valve biasing element shoulder 129 provided in the main body passageway 70 distally to the valve body 6 and the valve body 6.
  • the valve body 6 also defines at least one, and typically a plurality of circumferentially spaced apart, resiliently deformable tongue 130 having a hook portion 132.
  • the hook receiving portion 104 is provided for releasably receiving the hook portion 132.
  • the hook portion 132 takes the form of a flange protruding radially inwardly at the proximal end of the tongues 130. The interaction between the hook portion 132 and the hook receiving portion 104 is further described hereinbelow.
  • the valve body 6 is provided at the latch piston distal end 93.
  • the valve body 6 and latch piston 32 are movable between an engaged configuration (seen for example in FIGS. 14 and 15) and a disengaged configuration (seen for example in FIGS. 16 and 17).
  • the valve body 6 and latch piston 32 are secured to each other and prevented from moving axially from each other beyond a predetermined distance.
  • the valve body 6 and latch piston 32 are movable independently from each other along the main body passageway 70 further away than the predetermined distance.
  • the latch piston 32 and valve body 6 may be fixed relative to each other, or allowed to become even closer than the predetermined distance.
  • the latch piston 32 In the engaged configuration, the latch piston 32 is maintained distal to the latch piston proximalmost position by the valve body 6 and the valve body 6 is maintained proximal to the valve body distalmost position by the latch piston 32. In other words, in the engaged configuration, the valve body 6 and latch piston 32 have a restricted range of motion. When the disengaged configuration is achieved, the valve body 6 and latch piston 32 can move further respectively distally and proximally than in the engaged position to perform some actions that implement functionalities in the head assembly 50. [00102] In the engaged configuration, the hook portion 132 is received in the hook receiving portion 104, and in the disengaged configuration the hook portion 132 is outside of the hook receiving portion 104.
  • the flange 106 interferes with the hook portion 132 to retain the hook portion 132 in the hook receiving portion 104 in the engaged configuration.
  • the valve body 6 and latch piston 32 are configured and sized so that passage between the engaged and disengaged configurations occurs through deformation of the tongue 130 to allow movements of the hook portion 132 and hook receiving portion 104 relative to each other. In the specific embodiment shown in the drawings, this is achieved by the hook portion 132 being raised over the flange 106 through deformation of the tongue 130 when moving between the engaged and disengaged configurations.
  • the disengaged configuration is achieved from the engaged configuration when a predetermined axial tension is exerted between the latch piston 32 and valve body 6.
  • the engaged configuration is achieved from the disengaged configuration when a predetermined axial compression is exerted between the latch piston 32 and valve body 6.
  • the magnitudes of the predetermined axial tension and compression are determined by the material properties, shape and dimensions of the tongues 130 and by the shape and dimensions of the surfaces of the hook portion 132 and flange 106 that abut against each other during this transition.
  • the predetermined axial tension is larger than the predetermined axial compression, so that disengagement between the latch piston 32 and valve body 6 is more difficult then re-engagement of these components.
  • the hook receiving portion 104 and hook portion 132 are on the other component, ie respectively on the valve body 6 and latch piston 32.
  • the flange 106 protrudes outwardly and the hook portions 132 are open inwardly, the opposite is also within the scope of the invention with a flange 106 provided inside the latch piston 32.
  • a recess could replace the flange 106.
  • the latch piston 32 In the engaged configuration with the valve body 6 in the valve body proximalmost position, the latch piston 32 is disengaged from the latches 2. In the engaged configuration with the valve body 6 in the valve body proximalmost position, the latch piston 32 is between the latch piston proximalmost and distalmost positions. In the disengaged configuration, the latch piston 32 is moved to the latch piston proximalmost piston by the latch piston biasing element 1 1 .
  • valve body aperture 1 16 is in register with the latch piston 32 so that the latch piston 32 obstructs the valve body aperture 1 16.
  • the latch piston 32 is movable to be withdrawn from the valve body aperture 1 16.
  • the latch piston 32, valve body 6 and valve stop 8 are configured and sized so that in the engaged configuration, creating a predetermined fluid pressure differential between the main body proximal and distal ends 66 and 68 with a higher pressure at the main body proximal end 66 causes the valve 82 to achieve the valve closed configuration and to exert the predetermined axial tension to cause the latch piston 32 and valve body 6 to achieve the disengaged configuration.
  • movement of the latch piston 32 towards the latch piston proximalmost position is allowed, and a resistance to pumping of the fluids in a distal direction through the axial passageway 84 is created.
  • the latch piston 32 and valve body 6 are configured and sized so that with no fluid pressure differential exerted between the main body proximal and distal ends 66 and 68, moving the latches 2 to the latch retracted position causes the latch piston 32 and valve body 6 to enter the engaged configuration. This is because when this movement occurs, the latches 2 push distally on the latch piston 32 until the hook portions 132 pass over the flange 106.
  • each latch 2 defines opposed latch proximal and distal portions 144 and 146, and a latch intermediate portion 148 extending therebetween.
  • the latch proximal portion 144 defines a latch proximal end surface 150 and a latch proximal portion outer lateral surface 152, typically extending substantially perpendicularly thereto.
  • the latch distal portion 146 defines a latch distal end surface 156 and a latch distal portion inner lateral surface 158, extending for example substantially parallel to the latch proximal portion outer lateral surface 152.
  • the latch intermediate portion 148 may take the form of a generally elongated portion of the latch 2 that extends at an acute angle relative to the latch proximal portion outer lateral surface 152.
  • the latch 2 is rotatable relative to the main body 64. To that effect, the latch 2 is mounted to a latch pin 20 extending therethrough in the latch intermediate portion 148.
  • Each latch 2 is movable between the latch retracted position, shown in FIG. 3 for example, and a latch extended position, shown in FIG. 2 for example.
  • the latch retracted position the latch 2 is entirely, or almost entirely, contained in the main body 64.
  • the latch 2 is then oriented so that the latch proximal end surface 150 is angled relative to a perpendicular to the longitudinal axis of the head assembly 50.
  • the latch extended position the latch 2 is rotated relative to the latch retracted position so that the latch proximal end surface 150 is substantially perpendicular to the longitudinal axis of the head assembly 50 and the latch proximal end surface 150 protrudes from the body outer surface 12.
  • the latches 2 are in some embodiments configured and sized to achieve the latch retracted position under the action of the fluids on the latches 2 when the head assembly 50 is lowered in a fluid column.
  • the latches 2 are configured so that when a fluid is moved towards the main body proximal end 66 relative thereto, both outside of the main body 64 and inside the axial passageway 84, the fluid exerts a net torque on the latches 2 that is larger on the part of the latches 2 proximal to the latch pin 20 than on the part of the latches 2 distal to the latch pin 20.
  • the head assembly 50 also typically includes a spearhead point 27 at the main body proximal end 66 and securable to an overshot 40 (seen partially in FIG. 13) in a conventional manner.
  • a latch collar 24 is provided in the main body passageway 70. As better seen in FIG. 4, the latch collar 24 defining collar latch slots 160 extending radially therethrough. The latch collar 24 is movable between latch collar proximal and distal positions, seen for example in FIGS. 5 and 13 respectively). When the latch collar 24 is in the latch collar distal position, the collar latch slots 160 are in register with the main body latch slots 72 and allow movement of the latches 2 between the latch extended and retracted position.
  • the spearhead point 27 and the latch collar 24 are mechanically coupled to each other so as to be jointly movable axially relative to the main body 64.
  • the spearhead point 27 is secured to a spearhead base 23, provided distally relative thereto, which is itself mounted to a spearhead base housing 36 provided distally relative to the spearhead base 23.
  • These elements may be secured to each other using pins 29 and 33.
  • the spearhead base 23 is movable axially relative to the spearhead base housing 36 over a predetermined range of motion, for example by having the pin 33 mounted in a pair of diametrically opposed spearhead slots 200 receiving the pin 33.
  • the spearhead base 23 has a portion thereof received in a spearhead passageway 202 formed in the spearhead base housing 36.
  • the spearhead slots 200 extend from the spearhead passageway 202.
  • the spearhead passageway 202 is terminated distally by a spearhead passageway end element 204 and a bumper 28 extends between the spearhead base 23 and the spearhead passageway end element 204.
  • the bumper 28 is for example a resiliently deformable ring and serves to reduce the shock given when the overshot 40 lands on the spearhead point 27.
  • the spearhead base housing 36 is coupled to the latch collar 24 through a coupling element 25.
  • the spearhead base housing 36 is received axially slidably received in a guide 19 that is mounted in the main body 64 and prevented from moving proximally by a suitably shaped shoulder.
  • a latch collar biasing element 26 biases the latch collar 24 towards the latch collar distal position.
  • the latch collar biasing element 26 for example a coil spring, extends between the latch collar 24 and a collar shoulder 162 defined in the guide 19 proximally to the latch collar 24 and facing distally.
  • the latch collar biasing element 26 also pushes the guide 19 distally.
  • the guide 19 is configured to ensure that the coupling element 25, main body second segment 3 and spearhead point 27 have suitable axial rotation properties for proper operation of the head assembly 50.
  • the head assembly 50 also includes a core stopper 18 at the main body distal end 68.
  • the core stopper 18 abuts against the core to retrieve once the inner tube 39 is full.
  • the core stopper 18 is axially rotatable relative to the latches 2, for example through bearings 15, or suitable bushings. This reduces damages to the top portion of the core in typical operations.
  • the core stopper 18 is mounted to the main body fifth segment 17, which itself is rotatable about the spindle shaft 16, through bearings 15.
  • the spindle shaft 16 is fixed to the main body fourth segment 5. If no rotatable element, such as the core stopper 37, were present, this could damage the core.
  • the head assembly 50 also includes many other conventional components.
  • a shut off 164 is provided distally to the main body valve apertures 1 14 valve for sealing passage of fluids between the head assembly 50 and the outer tube assembly 52 upon a predetermined shut off compression being exerted between the inner tube 39 and the head assembly 50.
  • the shut off 164 includes deformable rings 21 that expand radially outwardly when compressed axially. The rings 21 are coupled to the tube attachment 71 and core stopper 18 so that when the inner tube 39 is full, the shut off 164 is activated. Washers 22 may be provided between the deformable rings 21 to adjust their deformation.
  • a proximally oriented force is exerted on the main body fifth segment 17, the latter moves on the spindle shaft 16 to compress the rings 21 and activate the shut off 164.
  • a seals, such as seal washer 38 may be provided between the bearing 15 and the spindle biasing element 7.
  • the head assembly 50 and its attached inner tube 39 are thrown down in a fluid-filled bore hole, in the outer tube assembly 52 in a head assembly first configuration.
  • the drill rods and outer tube assembly 52 may be filled with drilling fluid and/or subterranean water. These fluids slow down the downward movement of the head assembly 50 and the attached inner tube 39 .
  • the head assembly 50 of the invention increases the descent rate when compared to existing drilling systems. Conventionally, water or drilling fluid is injected under pressure in the drill rods and outer tube assembly 52 from the bore hole origin with the head assembly 50 inserted therein. This operation is referred hereinbelow as "pumping". This moves the whole water column through the drill rods and outer tube assembly 52.
  • the descent rate is increased for downwardly oriented bores as gravity further moves the head assembly 50 and inner tube 39 faster than the whole water column contained in the drill rods and outer tube assembly 52. This movement is facilitated by the axial passageway 84 which allows water and other fluids to flow through the head assembly 50.
  • the latch piston 32 and valve body 6 are in the engaged configuration, which prevents the latch piston 32 from engaging the latches 2 as is is retained distally to the latches 2 by the valve body 6.
  • the latches 2 are then free to achieve the latch retracted configuration. This eliminates friction between the latches 2 and the drilling rods and also reduces wear on the latches.
  • the valve 82 is in the valve open configuration as fluid flow through the axial passageway 84 push the valve stop 8 against the stopper 1 12.
  • the latch piston 32 and valve body 6 achieve the disengaged configuration as the fluid pushes on the valve body 6 while the latch piston 32 is in the latch piston distalmost position, and therefore prevented from moving further distally by a suitably configured, shaped and positioned shoulder formed in the main body 64, while the valve body 6 can still move to a more distal position by compressing the valve body biasing element 34.
  • the latch piston biasing element 1 1 pushes on the latch piston 32 proximally until the latter engages the latches 2 and pushes the latches 2 to the latch extended configuration through sliding of the latch distal portion 146 on the piston cam surface 92.
  • valve 82 since the valve 82 is in the valve closed configuration and since the valve body apertures 1 16 are distal to the main body valve apertures 1 14, there is a relatively large resistance to passage of fluids at the head assembly, which registers as a persistent high pressure signal in the pumping system used to pump the fluids. This indicates to the operator the head assembly has reached the position where drilling can resume.
  • This persistent high pressure signal is advantageous as it is difficult to miss, as opposed to conventional transient high pressure signals.
  • the operator stops pumping, which allows the valve body biasing element 34 to push the valve body 6 to the valve body proximalmost position.
  • the latch piston 32 remains disengaged from the valve body 6 as the flange 106 is then too proximal to the valve body 6 to allows the hook portions 132 to reach the flange 106.
  • the overshot 40 is lowered in a conventional manner to latch to the spearhead point 27.
  • Pulling on the spearhead point 27 causes the latch collar biasing element 26 to be compressed and moves the latch collar 24 to the latch collar proximalmost position, thereby moving the latches 2 to the latch retracted position.
  • This in turn pushes the latch piston 32 distally until the engaged configuration is achieved.
  • This automatically rearms the head assembly 50 so that the head assembly 50 is immediately reusable once the core has been removed. This is advantageous as in conventional drilling equipment, drillers often forget to reset the head assembly to a configuration required for proper operation after a core has been retrieved.
  • a seal 44 can be provided between the head assembly 50 and the outer tube assembly 52 to allow conventional underground operation.
  • a removable resiliently deformable seal 44 is mounted to the main body 64 proximal to the main body valve aperture 1 14, for example in an annular groove 35 formed in the main body 64, and thus allows switching between surface and underground operations easily.
  • the main body 64 defines at least one, and typically a plurality of, main body bypass aperture 170 extending substantially radially between the main body outer surface 48 and the main body passageway 70 distal to the latch piston 32.
  • the head assembly further includes a dry hole adapter 41 mountable to the main body 64 distal to the latch piston 32 with the valve body 6 removed from the head assembly 50.
  • the dry hole adapter 41 defines at least one, and typically a plurality of, dry hole adapter bypass aperture 174 extending substantially radially in register with the main body bypass apertures 170 and a dry hole adapter passageway 176 extending between the dry hole adapter bypass aperture 170 and the latch piston passageway 88.
  • the dry hole adapter passageway 176 defines a neck 178 and the dry hole adapter passageway 176 contains an adapter biasing element 42, for example a coil spring, distal to the neck 178.
  • the neck 178 and adapter biasing element 42 are configured and sized so that when fluids are pumped though the dry hole adapter 41 in a distal direction, the valve stop 8 is maintained in the neck 178 by the adapter biasing element 42 and substantially obstructs passage of fluid through the neck 178 until a predetermined fluid pressure differential across the dry hole adapter 41 is achieved. Therefore, a sizable fluid column can be accumulated above the head assembly in cases in which leaks prevent such a fluid column to be accumulated naturally. Once the fluid column has reached a sufficient height, the fluid can flow through the dry hole adapter 41 to allow drilling for a set period of time. Changing the adapter biasing element 42 for one having a different stiffness allows to obtain different fluid column heights.

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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)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne un ensemble tête (50) pour récupérer un échantillon de carotte. L'ensemble tête (50) comprend un passage axial (84) à travers lequel des fluides de forage peuvent circuler à l'intérieur de l'ensemble tête (50). Dans certains modes de réalisation, une soupape (82) est prévue pour obstruer sélectivement l'ensemble tête (50). La soupape (82) fournit des informations concernant l'état de l'ensemble tête (50) à un opérateur en surface en fournissant une résistance élevée ou faible à l'écoulement de fluide à travers le passage axial (84), en fonction de la configuration de l'ensemble tête (50).
PCT/IB2018/054334 2017-06-14 2018-06-13 Ensemble tête WO2018229690A1 (fr)

Applications Claiming Priority (2)

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US201762519469P 2017-06-14 2017-06-14
US62/519,469 2017-06-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113423917A (zh) * 2019-02-04 2021-09-21 博伊尔斯布罗斯迪亚曼蒂纳股份公司 用于岩心筒的上头组件
WO2023111870A1 (fr) * 2021-12-15 2023-06-22 Reflex Instruments Asia Pacific Pty Ltd Outil de déploiement et procédé

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Publication number Priority date Publication date Assignee Title
US6006844A (en) * 1994-09-23 1999-12-28 Baker Hughes Incorporated Method and apparatus for simultaneous coring and formation evaluation
US6029758A (en) * 1997-11-24 2000-02-29 Boart Longyear International Holdings, Inc. Retractable core barrel valving apparatus
US7314101B2 (en) * 2001-05-23 2008-01-01 2Ic Australis Pty Ltd Inner core barrel head assembly for core tube within a drill string
US8668029B2 (en) * 2008-05-15 2014-03-11 Longyear Tm, Inc. Sonic latch mechanism
US9151129B2 (en) * 2011-08-01 2015-10-06 Groupe Fordia Inc. Core barrel assembly including a valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6006844A (en) * 1994-09-23 1999-12-28 Baker Hughes Incorporated Method and apparatus for simultaneous coring and formation evaluation
US6029758A (en) * 1997-11-24 2000-02-29 Boart Longyear International Holdings, Inc. Retractable core barrel valving apparatus
US7314101B2 (en) * 2001-05-23 2008-01-01 2Ic Australis Pty Ltd Inner core barrel head assembly for core tube within a drill string
US8668029B2 (en) * 2008-05-15 2014-03-11 Longyear Tm, Inc. Sonic latch mechanism
US9151129B2 (en) * 2011-08-01 2015-10-06 Groupe Fordia Inc. Core barrel assembly including a valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113423917A (zh) * 2019-02-04 2021-09-21 博伊尔斯布罗斯迪亚曼蒂纳股份公司 用于岩心筒的上头组件
CN113423917B (zh) * 2019-02-04 2023-12-19 博伊尔斯布罗斯迪亚曼蒂纳股份公司 用于岩心筒的上头组件
WO2023111870A1 (fr) * 2021-12-15 2023-06-22 Reflex Instruments Asia Pacific Pty Ltd Outil de déploiement et procédé

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