RU2493348C2 - System and method of core boring with detachable core barrel - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: device and method of core boring, core sampling and testing of samples and measurement at the bottom of sea and water reservoirs, including a vertically moving and a horizontally stationary cross beam, a hoist with a rope wound on it, fixed on the cross beam, and a spindle spinner installed on the cross beam, a spindle made with a channel in it and driven with the spindle spinner, and a jar head having one end connected with the rope and the other end stretching via the channel in the spindle for attachment to the boring tool of the boring string and detachment from it. The spindle, the rope and the boring string together form a common central axial line during attachment of the jar head to the boring tool, detachment from it and during boring.

EFFECT: invention provides for boring, sampling and testing under water at sea bottom and bottom of water reservoirs.

18 cl, 55 dwg

Description

Technical field

The invention relates to drilling, core sampling, on-site sampling and testing underwater using a drilling system called Rovdrill 3. The Rovdrill 3 drilling system is essentially an enlarged version of the Rovdrill System from Perry Slingsby Systems, Inc., Jupiter, Florida using conventional diamond core drilling systems and is the subject of US Patent Applications Nos. 11/972080 and 11/972088, filed January 10, 2008 and incorporated herein by reference.

In onshore drilling operations, core drilling with a removable core receiver has been used for many years, and there are several companies producing tools for such drilling. In the specified drilling use tools with manual control of the drilling personnel. Manual control cannot be used for drilling on the ocean floor, since drillers cannot physically be present at the drilling site under water under environmental conditions. Therefore, underwater conditions use robotic systems for drilling.

The oil and gas industry also uses a deployment form on a cable in applications for monitoring existing oil wells and for increasing well production. These methods are called logging and overhaul.

Description of the invention

Accordingly, an object of the present invention is to provide a core drilling system and method with a removable core receiver, free from all the above-mentioned disadvantages of known devices and methods of this general type. More specifically, the aim of the invention is to provide an improved method and device for drilling, sampling and testing samples and measurements at the bottom of the sea and the bottom of water bodies using the Rovdrill 3 system.

According to the invention, the samples are extracted from the drill string using a cable winch and an overshot / switch in the embodiment of rotational or pressure sampling. On-site measuring devices including, but not limited to, cone, ball and tee penetrometers are placed at the bottom with a drill string and lifted from the drill string using a cable winch and an overshot / switch arrangement. This method of drilling, sampling and testing samples or measurements is faster than conventional methods, since the drill string does not need to be disassembled to remove the core drill or measuring device from the bottom of the drill string and reassemble when each core sample or measurement data has been extracted. The method of drilling with a removable core receiver also does not have problems with collapse of the wellbore, which can often occur in some soils, since the drill string can remain in the wellbore during operation. The collapse of the wellbore potentially violates the quality of core samples and is common in conventional drilling operations.

To achieve the above and other objectives, according to the invention, a device for drilling, coring and testing of samples and measurements on the bottom of the sea and water bodies. The device comprises a vertically moving and horizontally stationary transverse beam, a winch with a rope wound on it, fixedly mounted on the transverse beam, a spindle rotator mounted on the transverse beam, a spindle with a channel made therein, driven by a spindle rotator, and an overshot having one end connected to the rope and the other end passing through the channel in the spindle for attaching and detaching from the drill string to the drill tool. The spindle, wireline and drill string together form a common center line during attachment of the overshot to the drill tool and detachment of the tool during drilling.

To achieve the objectives of the invention also created a method of drilling, coring and testing of samples and measurements at the bottom of the sea and water bodies. The method comprises unwinding a rope from a winch connected to a vertically moving and horizontally stationary transverse beam, lowering the rope from the winch through the channel in the spindle to an overshot, attaching the overshot to the drill tool of the drill string and detaching it from the tool, rotating the drill tool with a spindle rotator connected to the transverse beam, and alignment of the spindle, rope and drill string along the central centerline while attaching the overshot to the drill tool and detaching from tool and while drilling.

The invention provides the replacement of drilling tools without lateral movement of the transverse beam, without disassembling the drill string to remove the core drill or measuring device from the layout of the bottom of the drill string, without reassembling the drill string when removing each core sample or measurement data and without problems of collapse of the wellbore known technique.

According to other features of the invention, the swivel is attached between the rope and the overshot. The overshot and swivel are designed to be pulled into the spindle channel by a winch to ensure tool replacement.

According to a further feature of the invention, a lifting rod is connected between the rope and the overshot. The lifting rod is made to pull into the channel in the spindle before the start of rotary drilling to seal the top of the channel. When the lifting rod is in the uppermost position, water flows down only through the spindle channel and drill string. Therefore, water can then be pumped down the spindle channel and drill string and into the wellbore for lubrication in the process of rock destruction during drilling and leaching of cuttings from the wellbore. Since the top of the spindle is hermetically closed, water cannot escape from the top of the spindle and must pass only as necessary to the bottom of the well.

According to additional features of the invention, the gripper and registration manipulators feed the drilling tool from a removable stand for interchangeable tools for installation on a common central center line for the drill string. The bar holder interacts with the gripper and alignment manipulators to replace the drilling tool. The tensioner maintains tension in the rope and prevents the rope from sagging while unwinding.

According to additional features of the invention, the overshot has a latch for docking with a fishing hook on a drilling tool.

According to other features of the invention, the device has at least one access panel for an underwater remote control device / divers. Specifically, each of the installation modules, the drilling module, and the base module can have an access panel for an underwater remote control device / divers, while the panels can be independent of each other and used for various functions / purposes.

According to another feature of the invention, the caisson rests on the surface of the seabed or the bottom of the reservoir, connects to the surface or passes into it, on the caisson there is a stinger for receiving a sampling tool, such as a pressure core sampler, to be installed before installing the base and performing drilling, coring or selection and sample testing. The sign is used to obtain samples from the surface of the seabed or bottom of the reservoir and samples of shallow depth of penetration during the initial penetration of the base into the ground.

Other features considered distinctive for the invention are set forth in the appended claims.

Although the invention is shown and described herein as implemented in a system and method for drilling with a removable core receiver, it is not intended to be limited by the details shown, since various modifications and structural changes can be made without departing from the essence of the invention and in the scope and range of equivalents of the claims.

The constructions of the invention and the additional objectives and advantages of the invention can be better understood from the following description of a specific embodiment and from the accompanying drawings.

Brief Description of the Drawings

In FIG. 1A, 1B, 1C and 1D are diagrams of isometric views of a core drilling rig with a removable core receiver of a caisson block, a base block, and a stinger of a caisson block of the installation according to the invention.

In FIG. 2 is an isometric view of the unit of the transverse beam of the installation.

In FIG. 3 is an isometric view of a unit winch unit.

In FIG. 4 is an isometric view of a gripper and alignment unit.

In FIG. 5 is an isometric view of a bar holder assembly.

In FIG. 6 shows an isometric view of a core drill in an arrangement with a fishing hook and a mounting lock.

In FIG. 7 is an isometric view of a tool in an arrangement with a fishing hook and a mounting lock.

In FIG. Figure 8 shows a fragment of a longitudinal section of a drill spindle with an overshot of the installation.

In FIG. 9 shows an enlarged view of a fragment of a longitudinal section of the drill stem and the overshot of FIG. 8.

In FIG. 10 is a side view of the transverse beam assembly of the apparatus shown in FIG. 2.

In FIG. 11 is an enlarged, longitudinal sectional view of a portion XI of FIG. 10.

In FIG. 12 is an enlarged isometric view of the arrangement of the lifting rod of FIG. 10.

In FIG. Figures 13-52 show significantly simplified schematic side views of a winch, drill stem, overshot, gripper and alignment blocks, and rod holder in addition to the stand block for interchangeable tools with drill pipes and tools and the layout of the bottom of the drill string, which describe the sequence of steps of the method according to the invention.

Best Mode for Carrying Out the Invention

In FIG. 1A shows an improved core drill rig with a removable core receiver according to the invention, including an underwater base module 1 that rests on the surface, connects to the surface or passes into the surface at the bottom of the sea and reservoir. This design can be, without limitation, a gravity foundation known in the art, a vacuum caisson, a support shoe with a skirt or a self-lifting base with many legs, legs adjustable in length or multi-section telescopic and may include retractable supports of various geometries and functions, including rigid or flexible, connected to flat, convex or concave blocks of the bearing plate, with spiral screws or retractable mechanical anchor devices. The base unit 1 shown is a caisson, which is also shown disconnected from the rest of the installation in FIG. 1B. A self-lifting base unit 2 with rods 3 aligned with the attachment points of the caisson is shown in FIG. 1C.

Mechanisms for extending and retracting these legs or actuating retractable anchors and screw devices may include, without limitation, hydraulic or electric actuators of linear or rotational action, gear mechanisms including rack and worm gears and gears of the type screw nut with threaded shaft and floating nut or recirculating ball screw.

Further significant changes to the prior art vacuum caisson, skirt support shoe, or multi-leg self-elevating base with multiple legs of the base unit include the known hollow tube 11 of the stinger shown in FIG. 1D, vertically passing through the top plate of the caisson or shoe base down a certain initial distance less than the total height of the vertical wall (s) of the caisson or shoe. This stinger pipe 11, which is known in the art, is substantially changed by including a latch in the channel interface that can provide sampling and testing with a tool, such as a pressure core sampler, to be installed before installing the foundation before drilling, coring or sampling and testing to obtain samples with the surface of the seabed or bottom of the reservoir and samples from a shallow depth during the initial penetration of the base. Such an interface should also allow the installation of removable casing pipes to improve subsequent drilling, coring, or sampling and testing of samples and to prevent collapse of the wellbore.

Additionally, significant changes to the known hollow stinger pipe 11 include a mechanical connection interface at the lower free end of the pipe to allow for the extension of additional stinger pipes or tools and casing of varying numbers, diameters, functions and lengths. Such a coupling interface may include, but is not limited to, a threaded joint, a mechanical interlock, and a friction fit.

The Rovdrill 3 subsea installation shown in FIG. 1A, is made of two main components: a drilling module 5 and a base module 1.

Each of the aforementioned assemblies has access panels for an underwater remote control device / divers that are independent of each other and used for various functions / purposes.

An interface or panel 4 for access to an underwater remote control device or divers mounted on the drilling module 5, as shown in FIG. 1A includes two operational electrical connectors and two docking receiving receptacles in operating condition in the upper row and two mechanical mooring sockets of the underwater remote control apparatus in the lower row. Such a remote control device not shown is Perry Slingsby Triton XLS 150HP ROV manufactured by Perry Slingsby Systems, Inc., Jupiter, Florida, as well as devices shown in US Patent Applications No. 11/972080, 11/972088, registered January 10, 2008 d. and incorporated herein by reference. However, in a core drilling system with a removable core receiver, there is no need to use a specific remote control apparatus of a preferred manufacturer. On the contrary, an advantage of the invention lies in the possibility of activating said system with any type of remote control device of his choice. The interface includes, without limitation, the interface (interfaces) of the mooring mechanisms of the underwater remote control apparatus, the hydraulic (including water and oil) and the electrical interface (interfaces) of the docking in the working state, manual adjustment mechanisms controlled by divers and the remote control the work of the feet of the base, manual adjustment of the control of the bleed valve of the caisson or shoe with the skirt, and the clutch / disengagement of the structure of the installation body with the cable Vym instruments with a mechanism on the module base 1.

More specifically, the drill module access panel 4 in FIG. 1A includes the remote control mechanical mooring receptacle sockets, which are components supplied by Perry Slingsby Systems, Inc, as well as the hydraulic and electrical operating sockets / docking sockets, which are also components supplied by Perry Slingsby Systems, Inc . (hydraulic docking jacks in working condition) and commercially available serial electrical connectors, such as Nautilus electrical connectors from Ocean Design Inc. When making connections to these interfaces using the remote control, all hydraulic and electrical power and control / telemetry signals are transmitted to the Rovdrill drilling module to actuate and control all the mechanisms used in the Rovdrill system to execute drilling, sampling and testing processes and measurements.

The base module 1 in FIG. 1A and 1B also has an access panel 46 for an underwater remote control apparatus / divers, including a docking port 47 in the operational state of the water line, allowing the suction pump to be connected on board the remote control apparatus and the caisson. If a deeper penetration of the caisson into the seabed is required for the stability of the Rovdrill system module, a high-capacity water transfer device can be connected to the docking socket 47 in working condition, connected by a hose to the suction pump on board the remote control unit, and the pump works by pumping out water from the caisson, thus creating a vacuum in the caisson and pushing it into the sea / reservoir bottom. Therefore, the interfaces of the hydraulic or electrical docking in working condition can be created on the panel 46 of the base.

Underwater core drilling system and structures for accommodating components, including a drilling module 5, a stand 6 for interchangeable tools or a carousel, a crossbeam 7, capture and registration blocks 30 having a capture manipulator 8 and a combination manipulator 9, and an access interface for underwater the remote control device or panel 4 is horizontally and vertically mounted on the base unit 1 by means of a remotely controlled and manually adjustable latch system or mooring mechanism 10, showing in FIG. 1B.

This structure additionally includes the end interface of the deployment and retrieval line with a detachable frame, which includes a lifting earring and an ascent module driven by a remote control device or by divers.

An interface or access panel 4 for a remote control device or divers is integrated into the external elements of the underwater drilling system and component placement structure. This interface 4 includes, without limitation, the mechanical interface (s) for mooring the remote control device, the hydraulic (for water and oil) and the electric interface (s) for docking in working condition, the manual control unit mechanisms controlled by divers and the remote control device correction of the basic functions of the cable.

The main components and blocks of a core drilling system with a removable core receiver are as follows:

the cable winch shown in FIG. 3;

auxiliary rope shown in FIG. 3;

overshot / switch shown in FIG. 2, 8 and 9;

the drill tool spindle shown in FIG. 2, 8 and 9;

the removable core receiver, tool, fishing hook and latch shown in FIG. 6 and 7; and

the tool handling and storage unit shown in FIG. 1A and in the above applications.

Cable winch

The function of the winch 12 shown in FIG. 3 consists in supplying the removable core receiver 20 shown in FIG. 6, or a sampling tool, or a site testing tool 25, shown in FIG. 7, into the drill string and extracting said tool from the drill string. The winch 12 includes a drum 13 driven by a hydraulic motor 14. An electric motor can be used instead of a hydraulic motor depending on the desired application.

The winch drum 13 (such as TX 0114-3A20-00) includes a cylinder (drum core) with flanges 15 attached at each end. A hole in the core of the drum or flanges allows the end of the winch rope to be mounted on the drum. The drum motor 14 (such as MOT-X 40518) drives the drum 13 through a stainless steel chain 16 and sprockets 17, one of which is located on the drive shaft of the motor 14, and the other of which is attached to the shaft of the drum 13. The gear ratio of the sprockets is selected to create the required torque and speed on the drum.

The angle of descent of the winch rope from the drum is the angle of inclination of the rope to the axis of the drum. Winches require a small angle of inclination of the rope to the axis of the drum (usually 0.5-2 degrees) for proper winding of the rope. To correct for the angle of inclination of the rope to the axis of the drum and minimize the angle, the winch includes a rope stacker (such as manufactured by Cellula Robotics Ltd., Vancouver, Canada) that winds the cable or rope 18 onto drum 13 and descends in such a way that the rope is wound on the core of the drum and is properly combined with the lower layers of the rope along the winding.

The rope 18 is wound on a winch drum 13 and is wound therefrom during operation by rotating the drum counterclockwise and clockwise and laterally moving the servo unit in the rope stacker. A reversing screw (such as TX 0114-3A00-28) facilitates this movement. The winch drum 13 can rotate in two directions on its axis, as described, but cannot move sideways under any circumstances, and can only move in the vertical plane when the transverse beam 7, on which it is fixedly mounted, is moved in this direction by a lifting mechanism 39.

In FIG. 10 is a side view of the transverse beam unit 7 of FIG. 2 and in FIG. 11 shows an enlarged portion XI of the crossbeam 7 in FIG. 10. The cross section in FIG. 11 passes through the sealing interface of the lifting rod 60 and the spindle channel 61. The circle in the center of FIG. 11 represents a sealing zone of a lifting rod. When the lifting rod 60 is in the upper position, as shown, water passes downwardly only through the spindle channel 61 and the drill string. The lifting rod 60 is shown in an exploded view in FIG. 12, which shows a shear pin 26, a watertight seal sleeve 62, and dual circular o-rings 63.

One end of the lifting rod 60 having a shear pin 26 is connected to the wire 18, and the other end is connected to the overshot 21. The top of the spindle channel can be sealed by pulling the lifting rod 60 all the way up to the top of the spindle 24 before starting rotary drilling. The advantage of this is the ability to pump water through the spindle channel and the drill string connected to it into the wellbore for lubrication during drilling and leaching of cuttings from the wellbore, while since the upper part of spindle 24 is sealed, water cannot exit through the top of spindle 24 and should only go to the bottom of the wellbore, as necessary.

The rope stacker is essentially a guiding device that can withstand the angle of inclination of the rope to the axis of the drum and may include a drive shaft or mechanism mechanically or electronically coupled to the drum drive mechanism so that the movement of the stacker is synchronized with the movement of the drum. This mechanism may include, without limitation, a diamond-shaped shaft, a spindle, an arrangement of a recirculating ball screw, a linear guide with electric or hydraulic control, a rack and pinion drive and a worm gear drive.

The stacker drive mechanism is designed to move the tracker assembly along the drum axis by a fixed amount, which depends on the diameter of the rope, so that successive turns are properly positioned without gaps.

If a diamond-shaped screw is used for the stacker drive mechanism, the direction of movement of the follower unit can change automatically without rotating the screw in the opposite direction. This automatic change of direction maintains a proper angle of inclination of the rope to the axis of the drum and ensures the laying of several layers of the rope on the drum.

The layout of the tracking unit is mounted on the drive shaft or mechanism described above. This servo unit moves along and parallel to the horizontal axis of the winch drum 13, the servo unit is combined with a guide mechanism of the rope, which may include a pair of vertically oriented freely rotating rollers installed at a certain nominal distance along the axes from each other, and between which the rope 18 is guided in the area between the drum 13 and the tension wheel, or may include a rotating and horizontally rotating pulley block that performs similar functions.

The result is a narrow winch drum 13 that can hold the rope 18 of the required length for use in drilling without lateral movement of the winch block 12 itself. Block 12 has a compact design, well adapted for installation on a spindle base structure called the transverse beam 7 of an underwater drilling device. The installation of the winch 12 on the transverse beam 7 has several advantages compared with the installation on a static structure, which are as follows:

the length of the rope 18 does not require adjustment by selection or unwinding when moving the transverse beam 7 up and down during normal operation;

the pulling power of the winch 12 may be limited since the cross beam lifting system 39 can be used to apply pulling power to the auxiliary rope 18 if additional linear force is required, resulting in a more compact winch 12;

the rope 18 can be detached if the internal removable core receiver is caught using the winch brake and shear pin on top of the swivel overshot 21 shown in FIG. 8;

the transverse beam 7 does not require movement at a distance from the centerline of the drill string, either sideways or vertically, to ensure that the cable enters the centerline of the drill string / spindle, since in this system the axial lines of the spindle, rope and drill string are common in any case .

Winch rope

The ropes 18 used for winch 12 can be of various types, including, without limitation, synthetic and wire ropes and ropes with inner wires used to monitor downhole sensors. Ropes with wires of instrumentation require the installation of a slip ring on one side of the winch 12.

The fastening of the ends of the rope on the drum 13 and overshot 21 can be performed by conventional methods, depending on the type of rope 18 used and the technical requirements for fastening the end.

The rope 18, proposed for use in the system according to the invention, is a high-quality synthetic rope Amsteel with a diameter of 1/4 inch (6 mm).

Winch rope tensioner

The rope 18 is mounted on the drum 13 with tension to ensure proper stacking of the turns of the rope on the drum and exclude cutting by turns of the upper layers of the turns of the lower layers. If the rope 18 is loosened, the rope is unwound on the winch drum 13 and may be located at the intersection of the adjacent turn, which would prevent proper rope winding on the drum. A suitable rope arrangement 23 is designed and manufactured by Perry Slingsby Systems Inc., Jupiter, Florida, to prevent loosening of the rope on the drum during use. When the rope 18 is unwound, the tensioner 23 generates the required rope tension, constantly preventing the rope from sagging between the winch drum 13 and the tensioner 23. This makes it possible to use a drive from a hydraulic motor and a hydraulic system. When the winch 12 unwinds the rope, the tensioner 23 creates a reverse tension, preventing it from sagging.

The tensioner 23 also has sensors installed in the layout, used to indicate the length of the unwinding rope and the force applied to the rope.

The tensioner unit 23 includes several of the following components.

The tension wheel creates an external force on the rope 18 to prevent slipping of the rope and is used to rotate the rope from winch 12 to the vertical axis of the drilling center. This wheel is made of aluminum coated with high friction plastic with machine processing for the diameter of the rope.

The driven roller generates a force on the idler to prevent the rope from slipping in the idler. The roller is made of plastic and includes a circumferential groove cut in a roller under the rope. A compression spring is used to apply the installation tension to the rope to the tension wheel. The driven roller also has a sensor used to determine the length of the etched rope or cable.

The hydraulic motor is mounted on the axis of the idler and is used to drive the idler from the hydraulic system to etch the rope. This engine acts as a brake when the winch unwinds the rope.

The mechanical load sensor is mounted on the structure above the idler and is used to measure the load on the rope 18.

The entire unit is suspended from the bottom to a suitable structural element by means of a horizontal swivel joint. This swivel movement ensures the optimal angle of inclination of the rope to the axis of the drum between the guides of the servo unit of the rope stacker and the tension wheel in the entire range of the lateral working stroke of the servo unit.

Overshot / Switch Layout

The overshot 21 shown in FIG. 8 is part of the overshot / switch unit 22 shown in FIG. 2, and is a key component of the core drilling system described herein. Block 22 is used to deploy an empty removable core receiver in the drill string using the alignment manipulator 9 of the alignment / capture device 30 shown in FIG. 4 and retrieving the full core receivers 20 by using a release and locking mechanism. It is also used to seal off the passage of water during drilling. The overshot 21 is attached to the rope 18 and placed inside the spindle 24 during drilling operations. The spindle rotator 38 is located on top of the spindle 24. The upper portion of the overshot 21 includes the swivel 54 shown in FIG. 9, used to prevent the rotation of the rope 18 during operation of the spindle 24. This section also includes a shear pin, which should ensure that the rope is disconnected from the swivel 54 if the overshot 21 and / or the removable core receiver 20 is caught at the bottom of the well. Auxiliary rope or rope 18 must be removed from the drill string to ensure disassembly of the string and lifting back to the surface.

Overshot block 22 has the following components.

A swivel 54 is located in the upper part of the overshot 21 and prevents the torsion of the rope 18 from rotating the spindle 24. When the rope is pulled, the top of the swivel 54 is pulled to the spindle 24 and hermetically cuts off the spindle to allow water to be pumped through the drill string. A shear pin 26 is mounted on the end portion of the rope to ensure separation of the rope from the drill string, if overshot 21 or removable core receivers 20 are clamped in the drill string.

The overshot locking unit 27 shown in FIG. 9 has fingers that are secured to the internal structure of the core receiver 20 by means of a separate / detachable arrangement of the fishing hook 28 and the locking unit 27, creating a connection interface between the core receiver 20 or tool 25 and the overshot block 22. In FIG. 9 also shows a water-separating seal 50, a modified spindle top cover 51, a release manipulator release clutch 52, and a leaf spring 53.

Drill spindle

Drill spindle 24 is a similar device manufactured for core drilling systems disclosed in US patent applications 11/972080 and 11/972088, registered January 10, 2008. The main change in this subsea drilling system is the ability to pull up block 22 overshot (swivel and overshot ) into spindle 24, allowing for a more compact layout.

Used removable core receiver 20 has a conventional design, including a latch 27 at the top, fixing the core receiver from the outside according to standard designs of core sampling systems operating on a cable from the surface.

Tool manipulation device and its storage

The tool manipulation device and its storage are integrated into the core drilling system and component placement design. This arrangement may include the following.

The rotating tool magazine shown in FIG. 1A and described in US Patent Application No. 11/972080, filed January 10, 2008.

The tool store has a stand 6 for interchangeable tools, which, in essence, is a stand holding the tools and measuring devices in an upright position in any number of rows or grooves side by side and any number of positions for gripping tools in a groove or row. The interchangeable tool stand 6 can be moved laterally so that any groove or row of tools can be mounted within the limits of access of the manipulators 8, 9 of the equipment of the gripper / alignment device 30 shown in FIG. 4 to remove or replace any tool in the rack 6.

The mechanism or drive for providing lateral movement of the tool stand 6 may include, but is not limited to, a rack and pinion mechanism, hydraulic or electric rotary or linear actuators, a chain or belt drive, a diamond-shaped shaft, a threaded spindle and nut, and a recirculating ball screw and Maltese drive.

In addition, the racks 6 can be completely removable with an underwater casing drilling system and component placement design, either remotely controlled or manually controlled during underwater operations or when the installation is in the above-water position.

The capture / alignment device 30 includes a telescopic cylinder 31 (such as CYL X 40533), capture fingers 32 (such as TX 0114-7200-00), first, second, and third steps 33, 34, and 35, as well as a base or fourth step 36, as shown in FIG. four.

The bar holder block 40 shown in FIG. 5 includes a rotating cylinder 41 (such as CYL-X 39259), an annular support 42 (such as TX 0114-4100-00), lower and upper latches 43, 44, and tool guides 45 (such as TX 0114-4000 -25).

Description of the sequence of operations of the improved method of core drilling with a removable core receiver

The following description relates specifically to a method of drilling with a removable core receiver and the steps of its sequence of operations. The method can be used in works using pressure-sensitive samplers and measuring devices with differences prevailing in this type of samplers. The way to deploy and retrieve using a winch and overshot tool is essentially unchanged.

As shown in FIG. 13, drilling begins with a drilling system located at the bottom of the sea and reservoir. All tools are installed in a rotary tool magazine or rack 6 for interchangeable tools in a specific order before deploying an underwater drilling rig. These tools may include conventional and removable core receivers 20, tools 25, the layout 29 of the bottom of the drill string, rods and drill bits. The transverse beam 7 carrying the drill stem 24, auxiliary winch 12, rope tensioner, overshot 21 of the overshot / switch arrangement 22, and safety sub 37 are deployed in the uppermost starting position. The manipulators 8, 9 of the capture and combination of devices 30 are removed in the initial position and the block holder 40.

The steps of the method are described below.

As shown in FIG. 13, if the sampler of the upper deposits or shallow depth of penetration is installed in the stinger 11 of the base, it should be initially removed and placed in the tool store or rack 6 for interchangeable tools using overshot 21 to capture and remove the tool from the stinger 11. Otherwise, carry out the step 2.

The overshot 21 is pulled into the spindle 24 using a winch 12. The brake on the winch 12 holds the layout 22 overshot / switch in the spindle 24.

The rotary tool magazine or rack 6 for interchangeable tools is installed in an appropriate place, which should provide access to the first tool to be deployed. This tool should be the bottom of the drill string assembly (BHA) 29.

As shown in FIG. 14, the interchangeable tool stand 6 is set so that the BHA 29 is opposed to the gripper and alignment manipulators 8, 9, and both manipulators are deployed or extend to the tool magazine or interchangeable tool stand 6 and capture the BHA 29.

In FIG. 15 it is shown that both the gripping and aligning manipulators 8, 9 extend or retract the BHA 29 through the retaining fingers in the magazine or rack 6 for interchangeable tools and are placed coaxially with the spindle 24 and the safety sub 37 and below them on the axial line of the wellbore.

As shown in FIG. 16, the transverse beam 7 is lowered to the input of the thread of the nipple of the safety sub 37 into the thread of the nipple coupling at the end of the BHA 29.

As further shown in FIG. 16, the spindle 24 is screwed into the BHA 29 using the counteraction of the upper gripper 8 to create a torque for securing the pipe lock between the safety sub 37 and the BHA 29.

In FIG. 17 shows that the grippers 8 are removed to the storage area, and according to FIG. 18, the transverse beam 7 lowers the BHA 29, while the spindle 24 rotates or remains stationary while drilling or pressing (or combining both types of feed, depending on the prevailing ground strength) of the BHA 29 into the ground to make the first trunk.

As shown in FIG. 18, drilling / coring is then continued using BHA 29 until maximum penetration is obtained, i.e. reaching the BHA / spindle lock position of the installation of a new link directly above the holder 40.

In FIG. 19 shows that after drilling, the BHA 29 is disconnected from the spindle 24 on the lock of the safety sub 37, holding the BHA still in the holder 40 and rotating the spindle 24 to unfasten the pipe lock.

As shown in FIG. 19, the transverse beam 7 is then raised to its upper initial position, and the interchangeable tool stand 6 is mounted to align the first core receiver 20 or tool 25 with the pick and place manipulators 8, 9.

The tool holder 6 or tool magazine shown in FIG. 20, is installed so that the empty core receiver 20 or the measuring tool 25 is installed against the manipulators 8, 9 capture and alignment.

According to FIG. 20, manipulators 8, 9 of gripping and aligning the device select an empty core receiver 20 or tool 25 from stand 6 for interchangeable tools or a tool store, remove it from the stand and install it on the centerline of the drill string above the wellbore.

In FIG. 22 shows that the overshot / switch arrangement 22 is lowered down by unwinding the rope 18 of the winch 12 from the initial position inside and above the drill spindle 24 to the outside and placed on the fishing hook 28 at the upper end of the core receiver 20 or tool 25, while the transverse beam 7 remains stationary .

In FIG. 23 shows that the winch 12 continues to lower the overshot / switch until the overshot / switch mechanism 22 is locked and the layout of the fishing hook 28 is fixed on the top of the core receiver 20 or tool 25. The crossbeam 7 remains stationary.

As shown in FIG. 24, the core receiver 20 or tool 25 is fixed with a fishing hook 28 in overshot 21, which, in turn, is connected to the rope through the swivel 54. Winch 12 selects the auxiliary rope, creating tension on it, and stretches the overshot / switch mechanism 22, while the cross beam 7 remains stationary.

In FIG. 25, the manipulators 8, 9 of gripping and combining the device 30 are freed from the core receiver 20 or the tool 25 and removed to their original positions.

According to FIG. 26, the core receiver 20 or tool 25 is lowered down by the winch 12 until the lower end of the core receiver or tool enters the channel of the BHA 29 installed in the wellbore below.

As shown in FIG. 27, the winch 12 continues to etch the auxiliary rope or rope 18, lowering the core receiver 20 or tool 25 further down into the BHA 29.

In FIG. 27 also shows that the core receiver 20 or tool 25 is housed in the BHA 29, that the overshot / switch assembly or mechanism 22 closes and releases the catch hook 28 of the core receiver or tool from the overshot / switch assembly. The core receiver or tool is now locked in the BHA and detached from the overshot / switch.

According to FIG. 28, 29, and 30, the winch then selects the rope, creates tension, extends the overshot / switch assembly 22 to detach the core receiver 20 or tool 25 from the fishing hook 28, and lifts the overshot / switch assembly from the BHA 29, raising the overshot / switch assembly 22 to top starting position in the spindle.

As shown in FIG. 31-35, the stand 6 for interchangeable tools moves to expose the drill pipe against the manipulators 8, 9 to capture and combine devices 30, the manipulators move forward and select and grab the drill pipe from the tool store or stand 6 for interchangeable tools, install it on the centerline of the barrel wells and are joined with the top of BHA 29 and the spindle safety sub 37 in the above-described manner by lowering the transverse beam 7 and using the rotation of the spindle 24 and the rod holder 40 to hold the pipes together lock between the drill pipe and the safety sub. Manipulators 8, 9 of capturing and combining device 30 release the drill pipe and return to their original position.

In FIG. 36 shows that it is possible to start a first rotational core sampling or pressure sampling and sample testing, and the transverse beam 7 moves downward with the spindle 24 stationary or rotating until the first drill pipe 25 is completed, for example, by 3 m.

According to FIG. 36 and 37, drilling, coring or measurement is stopped and the overshot / switch 22 is then deployed down from the upper starting position in spindle 24 into the channel of the drill pipe 25 to be fastened with a fishing hook 28 in the upper part of the core receiver or tool located in BHA 29, and detach the core receiver or tool from the BHA, while the transverse beam remains stationary.

In FIG. 38 it is shown that the winch 12 then selects the rope, and the core receiver 20 or tool 25 rises and is removed from the BHA 29 into the drill pipe, while the transverse beam 7 remains stationary.

As shown in FIG. 39, the spindle is then detached from the drill pipe on the safety sub 37 to fix the drill pipe in the holder 40 and rotate the spindle 24 to release the pipe lock.

In FIG. 39, it is further shown that the transverse beam 7 is raised to its upper initial position by removing the core receiver 20 or tool 25 from the drill string.

According to FIG. 40 and 41, the manipulators 8, 9 for gripping and combining the devices 30 are deployed from the initial position for gripping the core receiver 20 or tool 25 on the axial line of the wellbore and the winch 12, make a short etching of the rope and lower the overshot / switch mechanism 22 so that the overshot closes, while the overshot / switch is disconnected from the core receiver or the fishing hook of the tool, while the transverse beam 7 remains stationary.

As shown in FIG. 42 and 43, the winch 12 selects the rope so that the overshot 21 rises to its upper initial position inside the upper part of the drill spindle 24 with the fishing hook 28 of the core receiver 20 or the tool 25, completely detached from the overshot / switch, while the transverse beam 7 remains stationary.

As shown in FIG. 44, the core receiver 20 or tool 25 can be placed back into the tool magazine or rack 6 for interchangeable tools by moving the manipulators 8, 9 and gripping and aligning devices 30. As shown in FIG. 45, the manipulators for capturing and combining devices 30 release the core receiver 20 or tool 25 and return to their original position.

An empty core receiver 20 or tool 25 can now be placed in BHA 29 by repeating steps 2-8 described above, after which additional drill pipes can be built up, as in step 9 described above.

The wellbore passes through the method described above, until the wellbore reaches its design depth or failure, or until all drill pipes, core receivers 20 and tools 25 are fully used. When the last core receiver 20 or tool 25 is removed from the bottom of the drill string assembly 29, the entire drill string can be disconnect and place back in the tool magazine or rack 6 for interchangeable tools.

More specifically, with respect to steps 31-33, as shown in FIG. 46, the crossbeam 7 is lowered so that the safety sub 37 enters the drill pipe and the spindle 24 rotates to fasten the pipe lock between the safety sub and the drill pipe.

According to FIG. 47, the transverse beam 7 is raised so that the pipe lock between the drill pipe and the BHA 29 is located in the middle of the rod holder 40 in the unlocking position of the pipe lock, but the drill pipe is not separated from the BHA.

As shown in FIG. 48, the transverse beam 7 is raised so that the pipe lock between the drill pipe and BHA 29 is located above the rod holder 40 in a position with a fastened pipe lock.

In FIG. 49 it is shown that the transverse beam 7 is raised to the height of the post 6 with the rotation of the spindle 24 to completely separate the drill pipe from the BHA 29.

As shown in FIG. 50, manipulators 8, 9 of gripping and aligning devices 30 are extended to clamp drill pipes.

In FIG. 51, the spindle 24 is rotated and the crossbeam 7 is raised to its upper initial position to completely separate the drill pipe from the safety sub 37.

According to FIG. 52 manipulators 8, 9 of gripping and combining devices 30 are extended to place drill pipes back into the rack 6.

Claims (18)

1. A device for drilling, coring and measurements, at the bottom of the sea and water bodies, containing a vertically moving and horizontally stationary transverse beam, a winch with a rope wound on it, fixedly mounted on the transverse beam, a spindle rotator mounted on the transverse beam, a spindle with a channel driven by a spindle rotator and overshot, having one end connected to the rope and the other end passing through the channel in the spindle for attachment to the drill tool of the drill string and from repleniya from it, the spindle, the rope and the drillstring together form a common central axial line overshot during attachment to the drilling tool and detach from it during drilling. 2. The device according to claim 1, additionally containing a swivel connected between the rope and the overshot, while the overshot and the swivel are adapted to pull the winch into the channel in the spindle. 3. The device according to claim 1, additionally containing a lifting rod connected between the rope and the overshot and adapted to be pulled into the channel in the spindle before starting rotary drilling to tightly close the top of the channel. 4. The device according to claim 1, additionally containing a removable stand for interchangeable tools, and manipulators capture and alignment for feeding the drilling tool from the stand for interchangeable tools to the desired position on a common center line for the drill string. 5. The device according to claim 1, in which the overshot has a latch for docking with a fishing hook on a drilling tool. 6. The device according to claim 1, additionally containing at least one access panel for an underwater remote control device / divers. 7. The device according to claim 1, additionally containing a caisson resting on the bottom of the sea or reservoir connected to the bottom or extending into the bottom, and a stinger mounted on the caisson for receiving a sampling instrument. 8. The device according to claim 4, additionally containing a rod holder that interacts with the manipulators capture and alignment when replacing a drilling tool. 9. The device according to claim 4, further comprising a tensioning device for maintaining tension in the rope and preventing sagging of the rope when it is unwound. 10. A method of drilling, coring and measurements at the bottom of the sea and water bodies, comprising the following steps:
unwinding a rope from a winch connected to a vertically moving and horizontally stationary transverse beam;
rope descent from the winch through the channel in the spindle to the overshot;
attaching and detaching the overshot to the drill tool of the drill string;
rotation of the drilling tool with a spindle rotator connected to the transverse beam; and
alignment of the spindle, wireline and drill string along the common centerline while attaching the overshot to the drill tool and detaching from it and while drilling. 11. The method of claim 10, further comprising attaching the swivel between the rope and the overshot and pulling the overshot and the swivel into the channel in the spindle with a winch for attaching and detaching the drilling tool. 12. The method of claim 10, further comprising attaching a lifting rod between the rope and the overshot and pulling the lifting rod into the channel in the spindle before starting rotary drilling to seal the channel top. 13. The method of claim 10, further comprising storing the drilling tools in a removable tool rack and supplying drilling tools from the tool rack for installation on a common center line for the drill string by the gripper and alignment manipulators. 14. The method of claim 10, further comprising docking the fishing hook on the drill tool with a latch on the overshot. 15. The method of claim 10, further comprising communicating the underwater remote control apparatus or the diver with at least one access panel. 16. The method of claim 10, further comprising placing the sampling tool in a stinger mounted on the box, and resting the box on the surface of the seabed or bottom of the reservoir, connecting the box to the surface, or passing the box to the surface. 17. The method according to item 13, additionally containing a change of the drilling tool using a bar holder that interacts with the manipulators of capture and combination. 18. The method according to item 13, further comprising maintaining tension in the rope and preventing the cable from sagging while unwinding the rope with a tensioner interacting with the winch.

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