RU2580121C2 - Rakitin i. y. drilling rig for underwater vehicle - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to sampling equipment. Plant for drilling from an underwater vehicle includes cantilever frame with guide bars, movable spring-loaded rotator with output shaft, moving crossbar and core tube with drilling bit. Cylinder feeding force onto axis of drilling is set parallel to axis of drilling and connected to a stationary bracket on one hand, and on other - with a bracket moving crosspiece with biased against it by springs rotator provided with a pump for flushing the drill bit configured to suction water from environment and further pumping it into well through the core barrel, set in lunette.

EFFECT: improved quality of samples.

1 cl, 8 dwg

Description

The invention relates to technical means for sampling (cores) of rocks of the ocean floor from the side of an underwater habitable apparatus and can be used in oceanological research, exploration and engineering.

By the set of essential features, the prototype of the proposed device may be a sampler of the underwater vehicle according to AS SU No. 1458757 A1. It includes an underwater inhabited apparatus, to the supporting ski of which a cantilever frame is mounted by means of a hinge, on which a frame with guide rods is mounted using a hinge, on which a spring-loaded rotator is installed, connected with a drilling tool and a driving hydraulic cylinder located on the same axis with the rotator and the drilling tool .

However, this device does not allow sampling of rock (core) more than 200 mm in length and with a diameter of not more than 20 mm, since its height occupies the entire allowable space in the visual inspection zone, and does not allow to install a hydraulic cylinder for supplying force to the face of a larger size, which is a significant disadvantage of the device. As a result of the beating of a diamond crown, it is not always possible to obtain high-quality core samples. The “reverse” washing of drill cuttings provided in this device does not give the desired result, which also negatively affects the quality of the samples obtained

The purpose of this proposal is the ability to take rock cores up to 400 mm long, 21, 25, 40 mm in diameter without changing the size and height of the rig, which is important in conditions of limited space in the visual field of the underwater inhabited apparatus and improving the quality of the obtained cores by changing drilling mud flushing schemes and the use of a device that excludes runout of a diamond crown.

This goal is achieved by the fact that in the known device, the drilling depth and the length of the obtained core is limited by the length of the rod of the hydraulic cylinder 1 (Fig. 1), located on the same axis with the drilling tool. Installation of a larger hydraulic cylinder is not possible due to the proportional increase in the linear dimensions of the rig. The removal of the mast mast beyond the bow of the ballast tank 2 (figure 1) is unacceptable due to the violation of alignment with the center of gravity of the ballast tank and the loss of a significant part of the load on the drilling axis.

In the proposed device, the hydraulic cylinder for supplying force 1 (Fig. 1) to the bottom is parallel to the axis of drilling and the location of the movable beam 3 (Fig. 1), which makes it possible to install a larger hydraulic cylinder with a rod output of up to 450 mm, which corresponds to a drilling depth with a core output of up to 400 mm. In the upper part of the drilling rig, a bracket 4 is provided (FIG. 3) for use, if necessary, of a manipulator of an underwater inhabited apparatus. The quality of the obtained cores is improved due to the use of the lunar device 5 (Fig. 4), which allows holding the elongated drilling tool on the drilling axis and eliminates the runout of the drilling tool, which significantly affects the quality of the obtained samples.

The possibility of practical implementation.

In the drawing, figure 1 is a drilling rig of an underwater vehicle, a General view, the installation diagram on a habitable underwater vehicle.

In the drawing of figure 3 and figure 4 shows the drilling rig of the underwater vehicle, a General view. In the drawing, Fig. 5 shows a movable rotator with a working drilling tool, a mud pump device (Fig. 6) and a drilling mud flushing circuit during coring. In the drawing of Fig.7 and Fig.8 is a lunette device.

The device includes an underwater habitable apparatus 6 (Fig. 1), to the frame 7 of which, by means of a hinge 8, a cantilever frame 9 is mounted, on which a frame 11 is mounted using a hinge 10 (Fig. 2). The cantilever frame 9 is connected with the underwater vehicle 6 by the hydraulic cylinder 12, and with the frame 9 - by the hydraulic cylinder 13 (Fig. 2). On the guide rods 14 (Fig. 3), a movable rotator 15 is installed, preloaded by the springs 16 relative to the movable beam 3 (Fig. 4), connected by a supply hydraulic cylinder 1 (Fig. 3), the lower part of which is mounted on a fixed bracket 17, and the upper - on bracket 18 of the movable yoke. The movable spring-loaded rotator 15 (FIG. 4) includes a hydraulic drive motor 19 (FIG. 4). The output shaft 20 (Fig. 5) of the movable spring-loaded rotator 15 is made with splines and mated with a spline coupling 21 mounted on the upper part of the core pipe 22, which is equipped with a drilling tool 23 with a core ring 24, a drill bit 25, a sample storage device inside the core pipe 22, a mud pump with a vane sleeve 26 with a suction hole 27 and a discharge hole 28 (Fig.6). Water from the environment enters the mud pump through the opening 27 and is pumped through the pipe 29 into the chamber 30, then through the openings 31 (Fig. 5) into the core pipe 22, to the drill bit 25 and through the formed well 32 into the environment.

The movable spring-loaded rotator 15 (Fig. 4) is provided with return studs 33 installed in the holes of the brackets 34 of the movable beam 3 and in the threaded holes of the body of the drill rotator 15.

The drilling rig operates as follows

Selecting an object for sampling, the underwater habitable apparatus 6 (Fig. 1) sinks to the ground. The cantilever frame 9 and the frame 11 with the help of hydraulic cylinders 12 and 13 (figure 2) are transferred from the traveling position to the working position, while the guide rods 14 with stops 35 (figure 4) are installed on the bottom section where sampling will be performed. The angle of inclination of the frame 9 (Fig. 2) is set by the hydraulic cylinder 12. After that, the driving hydraulic motor 19 (Fig. 4) is turned on, which, by means of the splined part of the output shaft 20 (Fig. 6), is coupled to the spline coupling 21 on the core pipe 22 transmits rotation to the working a drilling tool 23 with a drill bit 25. Using a feed hydraulic cylinder 1 (Fig. 3) through a movable crosshead 3 (Fig. 4) and a spring 16, an axial load is applied to the movable spring-loaded rotator 15 and the core tube 22 with the drill bit 25, under which during rotation of the core pipe 22 Drilling of the sample is carried out. Springs 16 (figure 4) are used to accumulate the axial load supplied to the crown 25, and dampen the vibration of the core pipe 22.

During the rotation of the core pipe 22, the blade sleeve 26 (Fig. 6) draws in water from the environment through an opening 27 in the housing of the drill rotator and pumps it through the hole 28 and the pipe 29 into the chamber 30 (Fig. 5), whence water through the openings 31 in the core the pipe 22 enters the drill bit 25 and flushes it from the microparticles of the destroyed rock (sludge) according to the scheme in (Fig. 5). This method - “direct flushing” - allows you to effectively remove sludge from the well.

Detachment of the drilled rock sample is performed by the core ring 24 (FIG. 5) when the core pipe 22 is lifted from the well. In this case, the force required to detach the sample is transmitted to the core ring 24 from the supply cylinder 1 through the movable crosshead 3 (Fig. 4) and the return studs 33, which are displaced along the holes of the brackets 34 to the stop, due to which the movable rotator 15 rises along the guide rods 14 with a separation of the obtained core.

When taking the next rock sample at subsequent sampling points, the drilled sample advances the previous one to the upper part of the core pipe 22 (Fig. 5).

When performing sampling operations, the stable operation of the drilling tool 23 is provided by the lunette 5 (Fig. 4) mounted on an arm 36, which holds the cantilever part of the drilling tool and eliminates vibration and runout during rotation. The device consists of three rotating rollers 37 (Fig. 7), on which rubber rings 38 are installed for silent operation, connected by upper and lower brackets 39. In this case, two opposite rollers are located on brackets 2 mm below the horizontal axis for reliable holding of the drilling tool 23 (Fig. 8). The design allows the working tool to easily get out of the grip of the lunette if necessary to reset it in case of jamming in the well.

Claims (1)

Installation for drilling from the side of the underwater apparatus, including a cantilever frame with guide rods, a movable spring-loaded rotator with an output shaft, a movable crosshead and a core tube with a drill bit, characterized in that the hydraulic cylinder for supplying force to the drilling axis is installed parallel to the drilling axis and is connected to a fixed bracket on the one hand, and on the other hand, with the bracket of the movable beam with the rotator pressed to it by means of springs, equipped with a drill for washing the drill bit, made with the possibility of syvaniya water from the environment and further injecting it into the well through the core barrel mounted in the backrest.

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