SU1609951A1 - Core barrel - Google Patents

Abstract

The invention relates to mining, a means for drilling wells with coring. The goal is to increase the core yield. The core projectile contains a housing with a downhole hydraulic motor (ZGD) located inside it, an outer pipe with a rock-breaking bit connected to the ZGD rotor and a removable core receiver fixed by a supporting part with a gripping head in the supporting socket of the housing and located inside the outer pipe. The ZGD rotor is designed as a group of turbines connected with a removable hollow shaft by a spacer mechanism having retractable key prisms in the longitudinal grooves of the hollow shaft, interacting with radially movable ball pushers. The latter are installed in the sockets of the tubular body and mate with grooves on the surface of a longitudinally movable hollow rod located inside the tubular body and connected with a gripping head. In this case, the tubular body is connected to the supporting part of the removable core receiver, is installed inside the hollow shaft and is connected with it by rolling bearings, and the rotor turbines mate with each other with conical end surfaces. When the core receiver is seated by the support part on the body support seat, the hollow stem moves downward relative to the tubular body. The grooves of the followers are displaced relative to the followers, which push the prisms 24 apart and connect the turbines and the hollow shaft together. 9 il.

Description

The invention relates to mining, in particular to means for

drilling with core sampling.

The purpose of the invention is to increase core recovery.

Figure 1 shows the shell d, the upper part; 2 is the same, lower part; FIG. 3 shows a shell with a core receiver, a longitudinal section; FIG. figure 4 - removable kerpopreeyushk; 5 is an axonometric projection of a removable core receiver with a hollow shaft and a spacer mechanism with a cut-out 1/2; figure 6 is a fragment of the axonometric projection of the key prism; figure 7 is a fragment of the upper portion of the hollow rod} on 1FIG.8 - section aa in figure 5; on

figure 9 is a fragment of the axonometric projection of the reference socket.

The core projectile consists of a body 1 with an internal support socket in the form of a sleeve 2 with ribs 3 and channels 4 in them, communicating the cavity of the central opening 5 through check valves 6 with the annular space. The housing 1 has an assembly 7 for connection with drill pipes (not shown). Inside the housing there is a downhole hydraulic motor with a stator 8 and a group of turbines 9, connected together with the sockets 10 and 11 with a hollow shaft 12.

Turbines, sockets and the Polish shaft obrat the downhole motor rotor, installed in the housing 1 on the bearing assemblies 13, while the end surfaces of the turbines 9 and the sockets 10 and 11 are conjugate to each other conical. The lower end of the growth tube 11 is connected to the outer pipe

B

0

five

14, having a support assembly 15 for kinematically coupling with the housing 1 and a rock-breaking bit 16.

Inside the outer tube 14, a removable core core 17 is installed with a core rim 18 with a gripping head 19 and a support part 20 connected to a tubular body 21 carrying radially movable ball pushers 22.

The tubular body 21, in turn, is mounted on rolling bearings 22 inside the removable hollow shaft 23 with longitudinal grooves, in which the sliding key prisms 24 are placed, equipped with return springs 25 with limiting stops 26 and longitudinal notches 27.

The ball pushers 22 interact with the grooves 28 on the outer surface of the longitudinally-movable hollow rod 29 that mates with them.

The rod 29 is spring-loaded with a spring 30 relative to the tubular body 21, equipped with a conical cap 31 and connected to a gripping head 19 through a longitudinally-movable rod 32, having a counter-head 31 31, a grid 34, blades 35, an impeller 36 and a valve disc 37.

A tubular body 21 with pushers 22, a hollow rod 29 and keyed prisms 24 together form an expansion mechanism connecting the hollow shaft 23 to the turbines 9.

To hold the rod 29 in the upper position, a stopper 38 is provided in the supporting part 20 with a spring 39 and a fixing bar 40, a corresponding groove 41 on the rod 29 and a longitudinal notch 42 in the supporting socket 2.

The gas ha 32 has a bearing support 43 in the stem 29. Elastic linings 44 can be safely disposed on the inner surface to securely spread the prongs 44. The passage of flushing fluid is provided by channels 45, 46 and 47.

The columnar works as follows.

At the bottom ends, the core is lowered without a removable core receiver, as shown in FIG. When the projectile reaches the pumping fluid, the cavity is cleaned, the removable core receiver is lowered into the cavity of the drill pipe in the transport position, when the hollow rod 29 is locked by the stopper 38 in the upper position, the pushers 22 are in the slots (grooves) 28, the prisms 24 are recessed: the grooves of the shaft 23 and do not prevent the core receiver from passing through the cavity of the turbines 9, which interact with each other by conical surfaces, so that the turbines hold each other from displacement in planes perpendicular to the axis of the projectile. The rotating cores of the core receiver, the opti 35 and the impeller 36, as well as the open channels 45 in the support part 20, accelerate the immersion of the removable core receiver.

When the core receiver is seated by the support part 20 on the support socket, the strap 40, interacting with the socket, moves upward, releasing the stopper 58, which comes out of engagement with the groove 41 and falls on the other side between the notches 42. At the same time, - line 30 moves downwardly relative to tubular body 21, grooves 28 are displaced relative to pushers 22, which in turn are displaced radially from the axis of the screen, yes, expanding the prism 24 and thereby joining the turbine 9 and the hollow shaft 23 together. d ystviem own weight and moves down. In this case, the valve disk 37 overlaps the channels 45 from above, and the gap between the voutop 33 and the head cover 31 is retained, being the channel for the upward flow of washing liquid flowing through the channels 46, 45 and 4 into the annulus. The tubular body 21 keeps it from rotating due to the fact that the supporting part 20 is locked in the supporting nest.

five

0

five

0

5 5 0 5

The feed to the bottom of the washing fluid causes the turbine 9 to rotate and, through the prism 24, torque is transmitted to the hollow shaft 23, and then to the outer pipe 14 and the chisel 16, through the socket 11, to drill the rocks. The axial load on the bit 16 is transmitted through the support assembly 15 from the drill string and the tubing. When the flow past the impeller 36 rotates ha 32 and blades 35, creating an upward flow of industrial fluid in the core receiver 17. After filling the core receiver 17 with the core into the cavity of the drill pipe, the overshoot hooked onto the head 19 is lowered into the cavity, and the removable core core is lowered onto the rope surface: while the hollow rod 29, compressing the spring 30, moves up to the stop into the support part 20, since the latter remains in place under the action of its own weight and the weight of the column of washing liquid above it. The cana 28 are installed at the position of the pushers 22 and they are moved, pressed by the prisms 24 under the action of the springs 25. The upper part of the pipe 22 overlaps with the protrusion 33, which interacts with the conical cap 31, preventing the overflow of the washing liquid from part 20 of the core holder 18 and the support thereby preserving the core while lifting the core receiver from the well. Then, the lifting force is increased to such an extent that it becomes possible to move the stopper 38 along the notches 42 on the vertical wall of the upper step of the central hole 5 of the supporting seat, detachment: a removable core receiver from it and remove it to the surface. At the same time, the prisms 24 are embedded in the slots of the hollow shaft and do not prevent the core receiver from being removed.

Claims (1)

Invention Formula A coring block containing a housing with an assembly for connection to drill pipes and. an internal support seat, an internal hydraulic motor with a rotor in the form of a turbine rotor mounted on a bearing unit, a soy that is harnessed with a hollow shaft, an external pipe with a rock-breaking chisel and a supporting dL kinematic connection with the housing and; placed inside the outer tube I is a removable core receiver with a gripping head and support part for interoperating with the support seat, which is designed so that, with the aim of: improving the core code, the turbine is connected to the hollow shaft in | vvde of the spacer mechanism having | key prisms, a tubular body with radially movable ball pushers and a longitudinal movable hollow rod with grooves on the outer surface adjacent to the ball pushers, while the tubular body is connected to the supporting part and mounted on rolling bearings inside the hollow shaft, the hollow rod is connected to the gripping head, the polish shaft is made removable with and longitudinal grooves for the placement of key prisms, asoprene, with one another, end surfaces of adjacent turbines are conical. P Phage.2 P and 17 S Fig.Z FIG. 1e 36 Fi & .З FIG. 6 3 41 29 32 X 6 FIG. 7 A-A Thebes. eight FIG. 9