CN220415263U - Hydraulic hole expanding device for rope coring without lifting drill - Google Patents

Abstract

The utility model discloses a hydraulic hole expanding device for rope coring without lifting a drill, which comprises: the device comprises a body, a thrust plunger, a sealing piece, a pressure stabilizing unit and a hole-expanding drill bit, wherein the body is connected with a rotary pipe of which the rope is cored and is not lifted, and rotates along with the rotation of the rotary pipe, a cavity inside the body is connected with an auxiliary device of a mud pump on the ground, and a leading drill bit is arranged at the bottom of the body; the thrust plunger and the seal are located within the body interior cavity and configured to move in the body axial direction; the hole expanding drill bit is rotationally connected to the body, penetrates out of the body from the inside of the body, is positioned at one end of the inner cavity of the body and is contacted with the bottom of the thrust plunger, and drives the hole expanding drill bit to be unfolded outwards when the thrust plunger moves downwards, and drives the hole expanding device to rotate after the drilling machine is started to rotate, so that hole expanding is performed. The hole expanding device expands the hole expanding drill bit by using drilling fluid generated in the drilling process, then cuts and expands broken rock stratum and fault soft mud well sections, and releases stratum stress as much as possible to achieve the purpose of solving normal drilling coring.

Description

Hydraulic hole expanding device for rope coring without lifting drill

Technical Field

The utility model relates to the technical field of rope coring, in particular to a hydraulic hole expanding device for rope coring without lifting a drill.

Background

Generally, in the geological core drilling engineering, during the drilling construction process, the diamond rope is used for coring, and the faults such as blocking and wrapping are frequently generated due to the fact that the drilling meets loose broken stratum and fault soft plastic diameter reduction, so that normal drilling and coring work cannot be performed, the drilling blocking and diameter reduction and holding accidents can be caused under the action of ground stress, and the processing process consumes large manpower, material resources and time, and meanwhile, the problems of more potential safety hazards, additional accidents and the like exist, so that the accident processing efficiency is seriously affected.

At present, when a stratum is loosely broken and the stratum is broken and the fault is soft plastic and reduced in diameter in geological core drilling construction, a sleeve isolation treatment is generally adopted, and a large number of sleeves are required to be configured in the method, so that a large amount of manpower and material resources are wasted. If the caliber level is not enough, the casing pipe isolation cannot be used, and if the effective method is not adopted for treatment, the continuous construction of the drilling hole is seriously influenced.

In Chinese patent CN 111577182A, a high-efficiency rope coring system for deep sea hard rock and a coring drilling method thereof are disclosed, and a reaming drilling tool mechanism is specifically disclosed, wherein a piston is pressed under a hydraulic principle to drive an inner pipe of a supporting leg to move downwards, so that a supporting connecting rod is outwards spread, a reaming bit is spread, and faults such as jamming, holding drilling and the like are caused when the drilling bit is in loose fracture formation, fault occurrence during construction, and rapid hole expanding treatment is performed. However, this mechanism has the following problems:

1. the structure is complex, so that the reliability is relatively poor;

2. when the device works, the shearing pin is required to be sheared firstly, after the device is used, the upper piston, the guide tube and the like are required to be reset, and a new shearing pin is installed, so that the next use can be performed, and the maintenance cost and the use cost of the device are increased.

Based on the above, the utility model aims to provide the non-drilling hole expanding device which has a simple structure and is suitable for repeated use.

Disclosure of Invention

Aiming at the problems, the utility model provides the hole expanding device with a simple structure, which utilizes the hole expanding drill bit of the hydraulic hole expanding device to cut and expand broken rock stratum and fault mud well sections, and releases stratum stress as much as possible to achieve the purpose of solving normal drilling and coring.

On the basis of the original rope core drilling tool, the utility model also aims to replace the seat ring with a spline seat ring, wherein the size specification of the spline seat ring is consistent with that of the original seat ring, and the normal construction of rope core drilling is not affected.

According to a first aspect, the present utility model provides a hydraulic hole-expanding device for line coring without lifting a drill, comprising:

the body is connected with the rotary pipe which is used for taking the core and does not lift the drill by the rope and rotates along with the rotation of the rotary pipe, the internal cavity of the body is connected with the auxiliary device of the mud pump on the ground, and when the auxiliary device of the mud pump is used, mud is conveyed to the internal cavity of the body; the bottom of the body is provided with a leading drill bit;

the thrust plunger is arranged in the inner cavity of the body and configured to move along the axial direction of the body, and the thrust plunger is provided with a tension spring; the thrust plunger is provided with a through hole, and the through hole is coaxial with the body and is used for enabling outside drilling fluid to flow upwards when the device is lowered;

the sealing piece is arranged in the thrust plunger and is used for sealing the through hole when the mud pump auxiliary device conveys mud to the cavity in the body;

the pressure stabilizing unit is arranged on the body and used for controlling the water quantity and the water pressure of the internal cavity of the body during working;

the hole expanding drill bit is rotationally connected to the body, and penetrates out of the body from the inside of the body, one end of the cavity inside the body is in contact with the bottom of the thrust plunger, and the thrust plunger is used for driving the hole expanding drill bit to rotate and further expand outwards to expand holes.

Further, the internal cavity of the body is a step hole, and the thrust plunger is in a step shape matched with the step hole.

Further, the sealing element is a steel ball, a round hole is formed in the top of the thrust plunger, and the steel ball is located in the round hole.

Further, a steel ball limiting part is arranged on the round hole and used for limiting the steel ball in the round hole.

Further, a plunger limiting piece is arranged in the body and used for limiting the displacement of the thrust plunger.

Further, the voltage stabilizing unit is a plurality of voltage stabilizing holes arranged on the body, and the voltage stabilizing holes are communicated with the outside and the internal cavity of the body.

Further, an abutting part is arranged at one end of the hole expanding drill bit, which is positioned in the cavity inside the body, and extends into the stepped hole and abuts against the bottom of the thrust plunger, and when the thrust plunger moves downwards, the abutting part is pressed down and drives the hole expanding drill bit to rotate and expand outwards.

Further, a groove is formed in the outer side of the bottom of the body, the hole-expanding drill bit penetrates out of the body from the inside of the body, and the part of the hole-expanding drill bit penetrating out of the body is located in the groove.

Further, the top of the body is connected with the rotary pipe through an adapter.

The working principle of the utility model is as follows:

when the hole is expanded, the auxiliary device of the slurry pump pumps slurry generated by drilling of the rope coring non-lifting drilling tool into the body, and along with the entering of the slurry, the pressure of the cavity in the body is increased, the thrust plunger is extruded to move downwards, and the hole expanding drill bit is pushed to rotate and expand outwards.

The rotary pipe which is cored by the rope and does not lift the drill is fixedly connected with the outer pipe assembly, the outer pipe rotates and drives the rotary pipe to rotate, and then the body and the hole expanding drill bit are driven to rotate, and the hole expanding drill bit after being unfolded is rotated to expand holes.

If the drilling machine is in loose and broken stratum, fault soft plastic shrinkage causes and other faults frequently occur during construction, and when normal drilling and coring work cannot be carried out, the original rope coring inner tube assembly is proposed, an assembled new inner tube assembly (a rope salvaging mechanism, a rotary tube and a hydraulic hole expanding device) is conveyed to a spline seat ring of a drilling tool outer tube by utilizing a salvaging winch and a steel wire rope auxiliary device, then the salvaging winch and the steel wire rope auxiliary device are separated from the new inner tube assembly, the salvaging winch and the steel wire rope auxiliary device are lifted out of the well, a drilling machine and a mud pump auxiliary device are further connected with a drill rod in the hole, then the hole expanding drill bit is conveyed to a broken stratum and fault soft plastic shrinkage well section, then a mud pump is started to convey drilling fluid, the hole expanding drill bit is stretched and expanded by utilizing high-pressure hydraulic power generated by the drilling fluid in the hydraulic hole expanding device, then the drilling machine is started to rotate in a rotary mode, and then the torque and rotary power of the drilling machine are conveyed to the hole expanding drill bit by utilizing the spline seat ring and the torque transmission shaft connection. The hole-expanding drill bit cuts the wall of the broken and fault soft plastic well section under the circumferential rotation of the rotary power, further expands the wall of the broken and fault soft plastic well section, and after the wall of the broken and fault soft plastic well section is expanded, the new inner pipe assembly is lifted out of the well by the lower fishing winch and the steel wire rope auxiliary device, and then the original inner pipe assembly is lowered to continue the diamond rope coring normal drilling construction.

Compared with the prior art, the utility model has the beneficial effects that:

according to the hydraulic hole expanding device provided by the utility model, the hole expanding drill bit is stretched and expanded by utilizing high-pressure hydraulic power generated by drilling fluid (slurry) generated in the drilling process in the hole expanding device body, and further the hole expanding drill bit is driven to rotate by the rotation of the drilling machine, so that the well wall expanding of a broken fault soft plastic well section is realized, the frequent occurrence of faults such as blocking and packing caused by loose broken stratum, fault soft plastic shrinkage cause and the like in the drilling of rope coring construction can be rapidly and effectively solved, the influence of the faults is limited in a controllable range, the manpower, material resources and auxiliary time are reduced, the success rate of complex stratum fault treatment is improved, the drilling construction efficiency is improved, and the probability of scrapping the drilling due to complex stratum fault treatment failure is reduced.

Drawings

Fig. 1 is a schematic view of the rope coring non-lifting drilling tool in embodiment 1;

FIG. 2 is an exploded view of the card ejection chamber portion in example 1;

FIG. 3 is an exploded view of the coring bit of example 1;

FIG. 4 is a schematic view of the rope salvaging mechanism in embodiment 1;

fig. 5 is a schematic structural view of the hydraulic hole expanding device in embodiment 1;

FIG. 6 is a schematic view showing the hydraulic hole expanding device in example 1 when it is deployed;

fig. 7 is a schematic diagram showing the state of the rope coring in example 1 without lifting the hole of the drill.

Reference numerals:

11-rope drill pipe; 12-spring blocking heads; 121-card ejection chamber; 13-a spline seat ring; 14-spline torque transmission shaft; 15-a coring bit; 16-reamer; 17-righting ring; 18-outer tube of drilling tool; 2-a rope salvaging mechanism; 21-a spear fishing seat; 22-connecting rod; 23-snap-in boards; 24-elastic pins; 25-a recovery tube; 26-spring clamping frames; 27-compressing a spring; 28-positioning bolts; 29-a gasket; 3-turning a tube; 4-an adapter; 5-a hydraulic hole expanding device; 51-body; 511-a manostat hole; 512-grooves; 52-a thrust plunger; 53-steel ball; 54-a steel ball limiting piece; 55-plunger limiting piece; 56-tension springs; 57-hole-expanding drill bit; 58-leading bit.

Detailed Description

The utility model will be described in further detail below with reference to the drawings by means of specific embodiments.

Example 1

As shown in fig. 1, the present embodiment provides a rope coring non-lifting drilling tool, which includes an outer pipe assembly and an inner pipe assembly, wherein the outer pipe assembly is connected with a rope drill rod 1 of a drilling machine, the drilling machine drives the outer pipe assembly to drill, and the inner pipe assembly is arranged inside the outer pipe assembly for reaming.

Specifically, the outer tube assembly includes: the spring clip blocking head 12, the spring clip chamber 121, the outer pipe 18 of the drilling tool, the reamer 16 and the coring bit 15 are sequentially connected from top to bottom. As shown in fig. 2, the latch head 12 is formed in a cylindrical shape with the outer diameter identical to that of the outer tube 18 and the latch chamber 121, and has an external thread at the lower end for connection with an internal thread at the upper end of the latch chamber 121. The lower part of the screw thread is provided with a strip-shaped stop block with a 1/3 section of the circumference, and the stop block is used for limiting the elastic clamping plate 23 in the up-down circumferential running direction when the elastic clamping plate stretches and stretches to work. The inside of the spring blocking head 12 is hollow and is used for smoothly feeding and working the hydraulic hole expanding device 5, and drilling fluid flows into the space. The upper end inside the snap stop 12 is provided with an internal thread for connection with the rope drill rod 11.

The spring clamping chamber 121 is provided with a cylindrical shape with the outer diameter consistent with that of the outer pipe 18 of the drilling tool, and the lower end of the spring clamping chamber is provided with external threads for being connected with the internal threads at the upper end of the outer pipe 18 of the drilling tool; the inside is hollow, and the upper end of the inside is provided with internal threads for being in threaded connection with the lower end of the spring catch head 12; the middle section position is equipped with a step in inside for the cooperation of bullet card stop 12 lower extreme dog insertion, can be used to the working space when bullet cardboard 23 opens in addition.

As shown in fig. 3, the coring bit 15 is a diamond bit, which is mounted on the reamer 16 and used for cutting rock, the inside of the coring bit is hollow, the upper end of the coring bit is provided with common threads for being in threaded connection with the lower end of the reamer 16, the upper middle section of the outer part of the coring bit is a cylinder shape slightly smaller than the lower matrix, and the lower part of the coring bit is a diamond matrix matched with the caliber specification of a drill hole.

The reamer 16 is in a cylindrical shape, the outer middle section of the reamer is welded with a diamond tire block, and the outer diameter of the reamer is 0.5mm larger than the outer diameter of the matrix of the coring bit 15; the lower end of the outer part is provided with threads for being in threaded connection with the upper end of the coring bit 15; the inside is hollow, and the upper end of the inside is provided with threads for being in threaded connection with the lower end of the outer pipe 18 of the drilling tool; the middle section of the interior is provided with a step for mounting the centering ring 17.

The inner tube assembly includes: the cable fishing mechanism 2, the spline torque transmission shaft 14, the rotary pipe 3, the righting ring 17, the adapter joint 4 and the hydraulic hole expanding device 5 are characterized in that a step is arranged at the upper end inside the outer pipe 18 of the drilling tool and used for installing the spline seat ring 13, the spline seat ring 13 is a circular ring piece with a hollow inside and a circular outside, and an inner spline groove is arranged at the upper end inside the spline seat ring 13 and used for being in insertion fit with an outer spline groove of the spline torque transmission shaft 14. The outer diameter of the spline seat ring 13 is in clearance fit with the inner diameter of the lower step of the upper end thread inside the outer pipe 18 of the drilling tool.

The spline torque transmission shaft 14 is internally provided with a round hollow for drilling fluid to flow to the channel; the upper end of the elastic clamping frame is provided with internal threads for being connected with external threads at the lower part of the elastic clamping frame 26; the outer part is circular, and the middle section of the outer part is provided with a step for being positioned on the step of the middle section of the spline seat ring 13; the lower part is provided with external threads for being connected with the internal threads on the upper part of the rotary pipe 3.

As shown in fig. 4, the rope salvaging mechanism 2 includes: the fishing spear seat 21, the connecting rod 22, the elastic clamping plate 23, the elastic pin 24, the recovery pipe 25, the elastic clamping frame 26, the compression spring 27, the positioning bolt 28 and the gasket 29. The top center of the spring clip frame 26 is provided with an eyelet and is provided with threads for connecting with the positioning bolt 28; the upper section of the outer part of the spring clamping frame 26 is slightly smaller, and the middle section is provided with a step for installing the compression spring 27 and limiting; the upper part and the lower part of the step of the spring clamping frame 26 are provided with an elongated groove for installing the spring clamping plate 23 and the connecting rod 22; the lower part of the spring clamping frame 26 is provided with 2 water holes for drilling fluid to flow into the inner holes of the spring clamping frame 26 from the outside of the spring clamping frame 26; the outer lower section is provided with an outwardly protruding step for limiting the connection of the spring clamping frame 26 and the spline torque transmission shaft 14.

The snap-gauge 23 is a 1.0-1.5cm thick iron plate with a trapezoid upper part and a semicircular lower end, a small round hole is formed in the upper part of the snap-gauge, a round hole is formed in the lower end of the snap-gauge, the upper round hole is used for being connected with the lower part of the connecting rod 22 through a pin, and the round hole at the lower end is used for connecting the two snap-gauge 23 through a pin shaft. The snap-in plate 23 is set to have an upper trapezoid function, and can be clamped in a clamping groove of the snap-in chamber 121 when the snap-in is stretched out, so that the hydraulic hole expanding device 5 can normally work under the limiting action of the snap-in stop head 12 and the strip-shaped stop block thereof, and after the work is completed, the hydraulic hole expanding device is contracted under the action of the recovery pipe 25 to achieve smooth recovery.

The connecting rod 22 is a semicircular iron sheet with a thickness of 1.0-1.5cm, and the upper part is provided with a round hole and the lower part is provided with a semicircle. The upper part of the elastic clamping frame 26 is provided with a round hole in a semicircular manner for connecting with the round hole at the upper part of the elastic clamping frame; the lower part is arranged in a semicircle and is connected with a small round hole at the upper part of the elastic clamping plate 23 through a pin.

The spacer 29 is formed as a circular iron piece having an outer diameter corresponding to the compression spring 27 for compressing the compression spring 27. The positioning bolt 28 is used for penetrating through the central round hole of the gasket 29 and then being in threaded connection with the central round hole at the top of the spring clamping frame 26.

The compression spring 27 is a tension spring which is adapted to the inner diameter of the recovery pipe 25 and can be smoothly sleeved into the outer diameter specification of the spring clamping frame 26, and the tension spring is in a compressed state under the compression of the gasket 29 and the positioning bolt 28, and when the recovery pipe 25 is put in place, the compression spring 27 acts on the connecting rod 22 to enable the connecting rod to move downwards so as to force the spring clamping plate 23 to open outwards to be in a working state.

The diameter of the lower section of the outer part of the spear seat 21 is set to be cylindrical in clearance fit with the hollow circular ring inside the recovery pipe 25, and the spear seat 21 is inserted into the hollow inside the recovery pipe 25; the middle section is provided with a cylindrical pin hole for connecting the fishing spear seat 21 with the recovery pipe 25 through a pin shaft; the upper section is provided with a fishing spear with a conical top and is used for being connected with a fishing winch and a wire rope auxiliary device fishing spear hook in a self-locking way, so that the hydraulic hole expanding device 5 can be lowered and lifted in the rope drill rod 11.

The recovery pipe 25 is hollow and is used for installing the spring clamping frame 26, the compression spring 27 and the fishing spear seat 21; the upper section of the outer circular cylindrical pipe fitting is provided with a radial round hole for being connected with the round hole at the lower part of the fishing spear seat 21; a radial round hole is downwards arranged and is used for being connected with the spring clamping frame 26 and the connecting rod 22; two rectangular square grooves which are radially symmetrical are arranged in the middle of the elastic clamping plate and are used for installing the elastic clamping plate 23 and working space.

The spring clamping frame 26 is connected with the rotary pipe 3 through the spline torque transmission shaft 14, and the rotary pipe 3 is connected with the hydraulic hole expanding device 5 through the adapter joint 4. The hydraulic hole expanding device 5 comprises: the device comprises a body 51, a thrust plunger 52, a steel ball 53, a tension spring 56, a hole-expanding drill bit 57 and a pilot drill bit 58. Wherein, the upper middle section of the body 51 is provided with a cylindrical cavity, and the top of the cavity is provided with an internal thread for connecting with the adapter 4. The middle section is provided with 3 pressure stabilizing holes 511, and the pressure stabilizing holes 511 are communicated with the internal cavity of the body 51 and the outside and are used for controlling water quantity and water pressure during working; the lower section is provided with two holes for installing hole-expanding drill bit 57 through pin shafts respectively; the lower section is provided with a step with slightly smaller outer diameter and a through hole, the step section is provided with two grooves 512 for accommodating the hole-expanding drill bit 57, and the bottom end of the step section is provided with a leading drill bit 58 for drilling and sweeping obstacles at the front end during hole expanding operation.

As shown in fig. 5-7, the thrust plunger 52, the steel ball 53 and the tension spring 56 are all arranged in the cavity of the body 51, the whole thrust plunger 52 is matched with the shape of the cavity at the upper part of the body 51 and the shape of the through hole at the lower part, namely the shape with a large upper section and a small lower end, so that most drilling fluid can be sealed to generate high pressure, and the thrust plunger 52 can freely move up and down to generate a stroke to push the hole expanding drill bit 57 to work. The thrust plunger 52 is hollow, and a step is provided in the middle, and the tension spring 56 is sleeved on the lower part of the thrust plunger 52, and is used for being compressed when the thrust plunger 52 moves downwards, and after the work is completed, the decompression begins to rebound and stretch, so that the thrust plunger 52 moves upwards to restore to the original position.

The steel ball 53 is located in the groove at the upper part of the thrust plunger 52, and is used for closing the through hole at the lower part of the thrust plunger 52, so that the inner cavity of the body 1 generates pressure to push the thrust plunger 52 to move downwards to push the hole expanding drill bit 57 to work. The travel limit is performed above the steel ball 53 by a steel ball limiter 54 (cylindrical pin). A plunger stopper 55 (circlip) is provided above the thrust plunger 52 for restricting the upward displacement of the thrust plunger 52.

The hole-expanding drill bit 57 is provided with two pieces which are respectively positioned at two sides of the bottom of the thrust plunger 52 and are made of steel materials of composite pieces (or diamond) which are welded in an inlaid manner, the two pieces are arranged in two holes on the body 1, and when the thrust plunger 52 moves downwards in a working manner, the lower end of the outer part of the thrust plunger 52 is propped against the abutting part of the hole-expanding drill bit 57, so that the cutting edge of the hole-expanding drill bit 57 extends outwards to be in a hole-expanding working state.

Specifically, the specification of the 'hole expanding device' can be adapted according to the condition of the accident drill rod in the actual hole, so that the operation construction (see the table below) for eliminating the fault hazard of the complex stratum in the process of coring the diamond ropes with different specifications is realized.

The structure of this embodiment uses the specification cooperation table

The specific assembly and debugging steps are as follows:

firstly, checking the specification and the size of all parts of the hydraulic hole expanding device 5, wherein the appearance and the holes are free of burrs and silt, and simultaneously checking the performance and the parameter indexes of the hydraulic hole expanding device 5 to meet the use requirements; and then assembling the hydraulic hole expanding device. The method comprises the following specific steps:

firstly, installing two hole-expanding drill bits 57 on holes at the lower part of a body 51 by adopting an elastic pin, checking the free movement condition of the two hole-expanding drill bits 57 in a hole groove, and ensuring free and flexible movement and smooth outward expansion and contraction under the action of hydraulic pressurization;

then the steel ball 53 is put into the thrust plunger 52, and a steel ball limiting piece 54 is put into a plunger round hole to limit the stroke of the steel ball 53;

the tension spring 56 is sleeved into the small diameter of the lower part of the thrust plunger 52, then the thrust plunger 52 and the tension spring 56 are put into the upper round hole of the hydraulic hole expanding device 5, and the expansion and contraction conditions of the bottom of the thrust plunger 52 and the downward pressing of the tension spring 56 on the two hole expanding drill bits 57 are checked at the moment, specifically: when the top stroke of the thrust plunger 52 is pressed down to the pressure stabilizing hole 511, the two hole-expanding drill bits 57 are fully extended outwards to be in a cutting working state, and after the detection, the elastic retainer ring A8 is arranged in the annular clamping groove of the hydraulic hole-expanding device 5 to limit the stroke of the thrust plunger 52;

then, the external thread at the lower part of the adapter 4 is connected with the internal thread at the upper part of the hydraulic hole expanding device 5, and the assembly work of the hydraulic hole expanding device 5 is completed.

Secondly, assembling a bullet card recovery device:

firstly, the elastic clamping plates 23 and the elastic clamping frames 26 are connected after being inserted by elastic pins, and the direction and symmetry of the two elastic clamping plates 23 are required to be noted; then, sleeving the recovery tube 25 on the bullet clamping frame 26 and the bullet clamping frame 23, inserting a cylindrical pin at the lower part of the connecting rod 22 into a round hole at the upper part of the bullet clamping frame 23, then, aligning the three round holes by adopting a threading pin (auxiliary tool) at the middle round hole of the recovery tube 25, the round hole at the upper part of the connecting rod 22 and the round hole at the middle part of the bullet clamping frame 26, and then, inserting and threading the recovery tube 25, the connecting rod 22 and the bullet clamping frame 26 into the three round holes by adopting an elastic pin F2 immediately following the threading pin (auxiliary tool);

further, the compression spring 27 is arranged in the inner hole of the recovery pipe 25 until being sleeved on the upper section of the spring clamping frame 26, and the bottom of the compression spring 27 reaches the connecting rod 22;

further, the gasket 29 is installed in the inner hole of the recovery pipe 25 to reach the top of the spring clamping frame 26, then the positioning bolt 28 is installed in the central hole at the top of the spring clamping frame 26 by using a sleeve tool, so that the screw thread of the positioning bolt 28 is screwed with the screw thread of the central hole at the top of the spring clamping frame 26, and the purposes of pressing the gasket 29, the pressing spring 27, the connecting rod 22 and the spring clamping plate 23 are achieved;

further, the fishing spear seat 21 is installed in the inner hole of the recovery pipe 25, and then the middle round hole of the fishing spear seat 21 and the upper round hole of the recovery pipe 25 are connected after being inserted by elastic pins.

After the bullet card recovery device is assembled, attention must be paid to the freely flexible state of expansion, expansion and contraction recovery of the bullet card plate 23 and the connecting rod 22 of the bullet card recovery device, and the adjustment is not in line with the freely flexible state.

Thirdly, assembling each functional component:

firstly, connecting the external thread on the upper part of the adapter 4 of the assembled hydraulic hole expanding device 5 with the internal thread on the lower end of the rotary pipe 3;

then, the external thread at the lower end of the spline torque transmission shaft 14 is connected with the internal thread at the upper end of the rotary pipe 3;

further, the external thread at the lower end of the spring clip frame 26 of the spring clip recovery device is connected with the internal thread at the upper part of the spline torque transmission shaft 14;

after the parts are installed and debugged, the assembly of the new inner pipe assembly is completed; the performance condition of the new inner pipe assembly can be checked again, and if the performance condition is not in accordance with the requirement, the adjustment is carried out in time;

and finally, connecting the new inner pipe assembly with a test drilling tool, a drilling machine and a slurry pump pipeline on site before using, starting the slurry pump to perform surface test, verifying good performance of the new inner pipe assembly and collecting various working parameters for guiding the working state of the new inner pipe assembly in the well.

The specific operation and use steps are as follows:

in the construction process of diamond rope coring without lifting drilling, when normal drilling and coring work cannot be performed due to frequent occurrence of faults such as clamping and packing caused by loose and broken stratum, fault soft plastic shrinkage and the like, a new inner pipe assembly spear seat 21 which is ready to be assembled is connected with a steel wire rope of a lifting fishing winch and a spear hook, a hydraulic hole expanding device 5 is conveyed into a rope drill rod to the position of a spline seat ring 13 of an outer pipe 18 of a drilling inner rope coring drill by using the lifting fishing winch, and then the fishing winch, the steel wire rope auxiliary device and the spear seat 21 are lifted out of a well after the fishing winch and the steel wire rope auxiliary device are released;

note that: before a new inner pipe assembly is installed and lowered, the original inner pipe assembly is firstly fished out of a wellhead, and the integral good installation position of the spline seat ring 13 of the drilling tool is confirmed;

step two, connecting a drilling machine and a slurry pump auxiliary device with a drill rod in a hole, and then conveying a hole-expanding drill bit 57 of the hydraulic hole-expanding device 5 to the upper part of a broken stratum and a fault soft plastic reducing well section;

step three, immediately starting a slurry pump to pump drilling fluid, firstly confirming that the slurry pump works normally, then gradually feeding the drilling fluid into the well from small to large in an accident drill rod, paying attention to an observation instrument, stabilizing the pump quantity and the pressure when the pump quantity and the pressure reach the working parameters of a hole bottom power cutting device, and expanding the hole expansion drill bit 57 to meet the requirement of cutting well wall performance by utilizing high-pressure hydraulic power generated by the drilling fluid in the hydraulic hole expansion device 5;

step four, the rotary rotation of the drilling machine is started immediately, and then the torque and rotary power of the drilling machine are transmitted to the hole expanding drill bit 57 by utilizing the connection of the spline seat ring 13 and the spline torque transmission shaft 14; the hole-expanding drill bit 57 cuts the broken and fault soft plastic well wall under the circumferential rotation of the rotary power, further "expands and sweeps" the broken and fault soft plastic well wall, and in the work of cutting the well wall, the flow rate and the pump pressure of the slurry pump can be slowly increased, so that the hole-expanding drill bit 57 of the hydraulic hole-expanding device 5 can continuously expand the size of the cut well wall along with the increase of the cutting depth, and meanwhile, the drilling machine oil cylinder needs to be slowly pushed downwards, so that the hydraulic hole-expanding device 5 and the hole-expanding drill bit 57 can smoothly cut the well wall downwards.

Finally, when the pushing speed of the cutting well wall is reduced, stopping the rotation of the drilling machine and conveying drilling fluid after confirming that the length of the well section needing to be expanded is reached, and finishing cutting and expanding the well wall of the broken fault soft plastic well section by the 'not lifting the drilling and expanding device';

note that: in the cutting and expanding work, the working condition of the hole expanding device without lifting the drill in the well is observed, if the situation is abnormal, the device can be used for checking and eliminating hidden danger in time, if necessary, the device can be stopped for checking, the cutting and expanding work is continued after the hidden danger is eliminated, a pressure gauge is observed in the cutting and expanding work, when the cutting and expanding caliber is reached, the pump pressure is gradually reduced, the torque load of the drilling machine is reduced, and the cutting and expanding work of a fault well section can be confirmed;

step five, after the cutting and expanding work is completed, the vertical shaft of the drilling machine and the pipeline of the slurry pump are disassembled, a salvaging steel wire rope and a salvaging spear are hooked at a wellhead and lowered along the inner hole of a rope drill rod, and the salvaging steel wire rope and the salvaging spear are placed at the position of a salvaging spear seat 21 to lift the whole mechanism out of the wellhead;

step six, the original inner pipe assembly is put into the rope drill rod 11, then the vertical shaft of the drilling machine and the mud pump pipeline are connected with the rope drill rod at the wellhead again, drilling fluid is sent into the well, the drilling machine is started to perform trial rotation, cutting and expanding success can be confirmed when the drilling and sweeping reach the fault well section without barrier resistance, and then the normal drilling construction of rope coring can be continued.

Finally, after the components are disassembled and separated and oiled for maintenance, the damaged hole-expanding drill bit 57 is replaced, and the hole-expanding drill bit is completely assembled again for the next use.

The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims (9)

1. A hydraulic hole expanding device for rope coring without lifting a drill, comprising:

the body (51) is connected with the rotary pipe (3) which is used for taking the core and does not lift the drill, and rotates along with the rotation of the rotary pipe (3), the internal cavity of the body (51) is connected with the mud pump auxiliary device on the ground, and when the mud pump auxiliary device is used, mud is conveyed to the internal cavity of the body (51); a leading drill bit (58) is arranged at the bottom of the body (51);

a thrust plunger (52) disposed in the inner cavity of the body (51) and configured to move along the axial direction of the body (51), wherein a tension spring (56) is disposed on the thrust plunger (52); the thrust plunger (52) is provided with a through hole, and the through hole is coaxial with the body and is used for enabling outside drilling fluid to flow upwards when the device is lowered;

the sealing piece is arranged in the thrust plunger (52) and is used for sealing the through hole when the mud pump auxiliary device conveys mud to the containing cavity in the body (51);

the pressure stabilizing unit is arranged on the body (51) and is used for controlling the water quantity and the water pressure of the internal cavity of the body (51) during working;

the hole-expanding drill bit (57) is connected to the body (51), the body (51) penetrates out of the body (51) and is positioned at one end of the inner cavity of the body (51) to be in contact with the bottom of the thrust plunger (52), and the thrust plunger (52) is used for driving the hole-expanding drill bit (57) to rotate and further to be unfolded outwards to expand holes.

2. The hydraulic hole expanding device for rope coring without lifting drill according to claim 1, wherein the internal cavity of the body (51) is a step hole, and the thrust plunger (52) is a step shape matched with the step hole.

3. The hydraulic hole expanding device for rope coring without lifting drill according to claim 1, wherein the sealing element is a steel ball (53), a round hole is arranged at the top of the thrust plunger (52), and the steel ball (53) is positioned in the round hole.

4. A hydraulic hole expanding device for rope coring without lifting a drill according to claim 3, wherein a steel ball limiting member (54) is arranged on the round hole, and the steel ball limiting member (54) is used for limiting the steel ball (53) in the round hole.

5. The hydraulic hole expanding device for the rope coring without lifting the drill according to claim 1, wherein a plunger limiting piece (55) is arranged in the body (51), and the plunger limiting piece (55) is used for limiting the displacement of the thrust plunger.

6. The hydraulic hole expanding device for rope coring without lifting drill according to claim 1, wherein the pressure stabilizing unit is a plurality of pressure stabilizing holes (511) arranged on the body (51), and the pressure stabilizing holes (511) are communicated with the outside and the internal cavity of the body (51).

7. The hydraulic hole expanding device for rope coring without lifting drill according to claim 2, wherein one end of the hole expanding drill bit (57) located in the inner cavity of the body (51) is provided with an abutting portion, the abutting portion extends into the stepped hole and abuts against the bottom of the thrust plunger (52), and when the thrust plunger (52) moves downwards, the abutting portion is pressed down and drives the hole expanding drill bit (57) to rotate and expand outwards.

8. The hydraulic hole expanding device for rope coring without lifting drill according to claim 1, wherein a groove (512) is arranged on the outer side of the bottom of the body (51), the hole expanding drill bit (57) penetrates out of the body (51) from the inside of the body (51), and the part penetrating out of the body (51) is positioned in the groove (512).

9. The hydraulic hole expanding device for rope coring without lifting drill according to claim 1, wherein the top of the body (51) is connected with the swivel tube (3) through the adapter (4).