CN109779552B - Automatic start-stop mechanism of core drilling machine - Google Patents

Abstract

The invention discloses an automatic start-stop mechanism for a coring drilling rig, which includes a central rod, a liquid channel starting module, an outer cylinder, an outer cylinder unlocking module and a flow blocking module, and the central rod passes through the liquid channel starting module, the outer cylinder unlocking module and the flow blocking module In the inner cavity of the module, the liquid passage activation module is located behind the outer cylinder unlocking module and the outer cylinder, and the liquid passage activation module is connected with the outer cylinder unlocking module. The automatic start-stop mechanism of the core drilling rig provided by the present invention can automatically communicate with the hydraulic channel, contact the constraints of the working parts, and can cut off the hydraulic channel after the working parts reach the designated position, stop the pressure supply, stop the drilling, and release the pressure.

Description

Automatic start-stop mechanism for core drilling rig

technical field

The invention relates to a drilling and coring system, in particular to an automatic start-stop mechanism for a core drilling rig.

Background technique

In the process of oil field exploration, cores are important data for discovering oil and gas layers and studying formations, oil source layers, oil reservoirs, cap rocks, structures, etc. Through observation and research on cores, we can directly understand the lithology and physical properties of underground rock formations And oil, gas, water features. After the oilfield is put into development, it is necessary to further study and understand the sedimentary characteristics of the oil layer, the physical properties, pore structure, wettability, relative permeability, lithofacies characteristics of the reservoir, the physical simulation of the oil layer and the water flooding law of the oil layer through the core; In the development stage and the water flooding characteristics of oil layers in different water-cut stages, the distribution of remaining oil can be clarified, which can provide scientific basis for the design of oilfield development plan, layer series, well pattern adjustment and infill wells.

Core taking is to use special coring tools to take underground rocks to the ground in blocks during the drilling process. This block of rocks is called cores, through which various properties of rocks can be measured and the underground structure can be studied intuitively. and rock depositional environment, understand the nature of fluids, etc. In the process of mineral exploration and development, it is necessary to carry out drilling work according to the geologically designed stratum level and depth, to lower the coring tool into the well, and to drill out the rock samples.

The underground temperature is high, and the electrical equipment cannot be used. Hydraulic equipment is often used. Before the hydraulic equipment is started, the liquid flow channel needs to be blocked. Unblocked, provide hydraulic pressure to the working parts, drive the hydraulic motor, and cool the drill bit. When the working parts move forward to a certain position, it is necessary to stop the pressure supply to the working parts, stop the working parts, and release the pressure.

Contents of the invention

The purpose of the present invention is to provide an automatic start-stop mechanism for a core drilling rig, which can automatically communicate with the hydraulic channel and contact the constraints of the working parts, and can cut off the hydraulic channel after the working part reaches the specified position, stop the pressure supply, stop the drilling, and release the pressure. pressure.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

The automatic start-stop mechanism of the coring drilling rig disclosed by the present invention includes a central rod, a liquid channel starting module, an outer cylinder, an outer cylinder unlocking module and a flow blocking module, and the central rod passes through the liquid channel starting module, the outer cylinder unlocking module and the flow blocking module In the inner cavity, the liquid passage activation module is located behind the outer cylinder unlocking module and the outer cylinder, and the liquid passage activation module is connected with the outer cylinder unlocking module.

Further, the liquid channel starting module includes a lock body, a locking rod, and a starting shear pin. The locking rod is in the lock body, and the locking rod and the lock body are connected through the starting shear pin. Segment A, the locking rod includes a sealing segment B, the sealing segment A is sealingly matched with the sealing segment B, the sealing segment B is sealingly fitted with the central rod, there is a liquid channel A between the central rod and the locking rod, and the locking rod has an outflow Hole A, outflow hole A is connected to liquid channel A, outflow hole A is behind the sealing section B, there is a liquid channel B between the lock body and the locking rod, and liquid channel B is in front of the sealing section A, before the shear pin is started to cut off, the outflow hole A exits At the sealing section A, the front end of the liquid passage A is sealed. After the shear pin is cut off, the locking rod moves forward, and the outlet of the outflow hole A is located in front of the sealing section A, and the liquid passage A and the liquid passage B are connected through the outflow hole A.

Further, the unlocking module of the outer cylinder includes a connecting pipe and a locking pin, the rear end of the connecting pipe is connected to the lock body, the rear end of the locking pin is connected to the locking rod, the central rod passes through the inner chamber of the locking pin, the locking pin is in the connecting pipe, and connected The outer diameter of the front section of the pipe is smaller than the inner diameter of the outer cylinder, and the side wall of the front section of the connecting pipe has an unlocking hole. The outer wall of the lock pin has a groove A, and the inner wall of the outer cylinder has a groove B. It also includes a pin whose length is greater than the depth of the unlocking hole. In the unlocking hole, the outer end of the pin is chamfered and/or the side of the groove B is a slope, the width of the groove A is not less than the width of the inner end of the pin, the width of the groove B is not less than the width of the outer end of the pin, and the shear pin is activated Before cutting, the front end of the connecting pipe is in the outer cylinder, the pin is in front of the groove A, the inner end surface of the pin slides and fits with the outer wall of the lock pin, and the outer end of the pin is embedded in the groove B. After the shear pin is started to cut, the locking lever drives the lock pin to move forward. The unlocking hole is directly opposite to the groove A, the inner end of the pin is embedded in the groove A, and the distance from the inner end surface of the pin to the inner wall of the outer cylinder is greater than the length of the pin.

Further, the flow blocking module includes a valve housing, a lock housing and a trigger mechanism, the central rod passes through the inner cavity of the valve housing, the valve housing is inside the lock housing, and the valve housing includes a sealing section C and a guide section, the lock housing includes an inflow section B and an outflow section B from back to front, there is a liquid passage D between the center rod and the inflow section B, and the rear end of the liquid passage D is connected to the liquid passage B, and the inner diameter of the inflow section B is larger than that of the sealing section C diameter, the outer diameter of the sealing section C is greater than the outer diameter of the diversion section, the inner diameter of the outflow section B is equal to the outer diameter of the sealing section C, the outflow section B has an outflow hole B, and the outflow hole B is connected to the working parts. Before the drilling is stopped, the sealing section C The front end is in the inflow section B, and the liquid channel D is connected with the outflow hole B. After the drilling is stopped, the sealing section C is sealed with the outflow section B, and the liquid channel D is cut off from the outflow hole B.

Further, the valve housing also includes a locking section A, which is connected to the front end of the diversion section, and the lock housing also includes a locking section B, which is connected to the front end of the outflow section B. The inner wall of the outer cylinder is connected with a safety gear. The trigger mechanism includes a locking sleeve, a fixed ring, a safety gear, locking section A and locking section B. The lock shell passes through the inner cavity of the locking sleeve, and the outer wall of the locking section A There is a locking groove A, and there is a locking hole on the locking section B. The locking hole is a through hole. There is a locking ball in the locking hole. The diameter of the locking ball is larger than the depth of the locking hole. The locking sleeve is from the back to the front. It includes an impact section and a locking section C. There is a locking groove B on the inner wall of the locking section C. The distance from the bottom of the locking groove A to the inner wall of the locking section B is less than the diameter of the locking ball. The bottom of the locking groove A The distance from the outer wall of the locking section B is not less than the diameter of the locking ball, the distance from the bottom of the locking groove B to the outer wall of the locking section B is less than the diameter of the locking ball, and the distance from the bottom of the locking groove B to the outer wall of the locking section B The distance of the inner wall is not less than the diameter of the locking ball, the fixing ring is fixed on the outer wall of the locking section B, the fixing ring is behind the locking hole, the inner diameter of the impact section is greater than the outer diameter of the fixing ring, and the locking section C is in front of the fixing ring. The inner diameter of the outer cylinder is larger than the outer diameter of the lock shell and the locking sleeve. The safety gear includes a clamping part and an extruding part from back to front. The inner diameter of the front end of the clamping part is smaller than the outer diameter of the rear end of the fixed ring. The gap of the inner wall of the housing is smaller than the thickness of the front end of the locking section A. The axial distance from the front end of the clamping part to the front end of the extrusion part is equal to the axial distance from the center of the locking hole to the center of the locking groove B before stopping drilling. The distance from the rear end of the sealing section C to the rear end of the outflow hole B is greater than the axial distance from the center of the locking hole to the center of the locking groove A after the drilling is stopped, and the axial distance from the center of the locking hole to the center of the locking groove A after the drilling is stopped It is greater than the distance from the front end of the sealing section C to the front end of the outflow hole B before the drilling is stopped.

Further, there is a liquid passage C between the central rod, the lock pin and the locking rod, and the side wall of the locking rod is provided with an inflow hole, the liquid passage B and the liquid passage C communicate through the inflow hole, and the liquid passage C communicates with the liquid passage D. The connecting pipe includes a pressure relief section and a flow blocking section from back to front. The lock pin is sealed with the flow blocking section. The inner diameter of the flow blocking section is smaller than the inner diameter of the pressure relief section. There is a shearing plunger in the liquid channel B, the inner diameter of the shearing plunger is larger than the outer diameter of the lock pin and the locking rod, the shearing plunger is connected with the lock body through the end shearing pin, and the shearing plunger includes the shearing section and the Recoil section, the outer wall of the shear section is in sealing fit with the inner wall of the lock, the outer diameter of the recoil section is equal to the inner diameter of the part in front of the pressure relief hole of the pressure relief section, before the drilling stops, the front end of the recoil section is in front of the front end of the pressure relief hole, and the recoil section is in front of the front end of the pressure relief hole. The front part of the pressure relief hole in the pressure relief section is sealed and fit. After the drilling is stopped, the front liquid backflow impacts the front end of the shear plunger, and the shear plunger moves backward. The front end of the recoil section is behind the front end of the pressure relief hole. Liquid channel B and the pressure relief hole connected.

Further, the outer wall of the locking rod and the inner wall of the lock have limit steps that cooperate with each other.

Further, it also includes a lock nut. The lock nut is behind the lock body. At the rear end thread of the lock body.

Further, the lock nut includes a fixed section and a threaded section, the outer diameter behind the step of the locking rod is smaller than the inner diameter of the fixed section, the inner diameter of the fixed section is smaller than the outer diameter of the step of the locking rod, and the inner diameter of the threaded section is connected to the rear end of the lock body.

Further, the locking nut has a locking hole A in the axial direction, the locking hole A is a through hole, the rear end of the lock body has a locking hole B, the locking hole B is a blind hole, and the locking hole A and The locking hole B is paired, and also includes a fixing screw. The length of the fixing screw is greater than the depth of the locking hole A. The fixing screw is in the locking hole A, and the front end of the fixing screw passes through the locking hole A and is embedded in the locking hole B.

The present invention has the following beneficial effects:

1. Before starting, start the shear pin to fix the locking rod on the lock body, the outflow hole A is in the sealing section A, the opening of the outer wall of the outflow hole A is sealed, the liquid channel is cut off, the connecting pipe is connected to the lock body, and the outer end of the pin is embedded in the concave In tank B, lock the outer cylinder on the connecting pipe. When the hydraulic pressure provided by the rear mud pump reaches the starting value, the starting shear pin is punched, and the locking rod moves forward. The liquid enters the liquid channel B through the outflow hole A through the liquid channel A, and then It flows into the liquid channel C through the inflow hole, and flows through the liquid channel D. The liquid channel D communicates with the front hydraulic motor through the outflow hole B. When the hydraulic motor is started, the locking lever moves forward to drive the lock pin forward, so that the groove A is facing the unlocking hole , the gravity of the outer cylinder moves forward, the contact surface between the groove B and the outer end of the pin is an inclined plane, the pin is squeezed into the groove A, and the constraint on the outer cylinder is released, and the front end of the outer cylinder is connected with working parts such as the hydraulic motor rotor and the drill bit, so that the drill bit move forward;

2. Before stopping the drilling, the locking ball is in the locking hole and the locking groove A to lock the valve housing and keep the liquid channel D connected to the front hydraulic motor through the outflow hole B. When the outer cylinder moves forward to the stop position, The outer cylinder drives the safety gear to hit the locking sleeve, so that the locking sleeve moves forward, the locking groove B is in direct contact with the locking hole, the radial constraint of the locking ball is released, the liquid impacts the rear end of the valve housing, and the locking ball is squeezed Entering the locking groove B, the valve housing moves forward, the sealing section C isolates the liquid channel D from the outflow hole B, stops supplying energy to the front motor, and the motor stops. Since the liquid channel D is blocked, the liquid surges back and flows Liquid return channel B, the front end of the recoil shearing plunger, the shearing plunger is subjected to a backward force, the shearing plunger moves backward, the front end of the recoil section moves behind the pressure relief hole, and liquid channel B passes through the pressure relief hole to connect with the outside Connected, the liquid is discharged from the pressure relief hole;

3. Set the lock nut, the lock nut is threaded with the lock body, and the connection section is threaded with the outflow section A, which is convenient for installation and replacement of the starting shear pin;

4. The locking holes A and B cooperate with the fixing screws to limit the circumferential rotation.

Description of drawings

Fig. 1 is a schematic diagram before the start-up of the liquid channel start-up module;

Fig. 2 is a schematic diagram after the start-up of the liquid channel start-up module;

Fig. 3 is a schematic diagram before the start-up of the outer cylinder unlocking module;

Fig. 4 is a schematic diagram of the outer cylinder unlocking module after the drilling is stopped;

Fig. 5 is a schematic diagram before the choke module stops drilling;

Fig. 6 is a schematic diagram after the choke module stops drilling;

In the figure: 11-lock body, 111-locking section, 112-sealing section A, 113-fluid channel section, 12-locking rod, 121-connecting section, 122-outflow section A, 1221-outflow hole A, 123-sealing Section B, 124-inflow section A, 1241-inflow hole, 13-start shear pin, 14-center rod, 15-lock nut, 151-fixed section, 152-threaded section, 16-fixing screw, 21-connecting pipe , 211-connection section, 212-pressure relief section, 2121-pressure relief hole, 213-choke section, 22-lock pin, 221-groove A, 23-outer cylinder, 231-groove B, 232-safety gear , 2321-clamping part, 2322-extrusion part, 24-pin, 25-end shear pin, 26-shear plunger, 261-shear section, 262-recoil section, 31-valve housing, 311- Sealing section C, 312-guiding section, 313-locking section A, 32-lock shell, 321-inflow section B, 322-outflow section B, 3221-outflow hole B, 323-locking section B, 33-lock Tight sleeve, 331-impact section, 332-locking section C, 34-locking ball, 35-fixing ring, 36-limiting head, 37-clip ring, 41-liquid channel A, 42-liquid channel B, 43 - Channel C, 44 - Channel D.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

The automatic start-stop mechanism of the coring drilling rig disclosed by the present invention includes a central rod 14, a liquid channel starting module, an outer cylinder, an outer cylinder unlocking module and a flow blocking module, and the central rod passes through the liquid channel starting module, the outer cylinder unlocking module and the flow blocking module. In the inner cavity of the module, the liquid channel activation module is located behind the outer cylinder unlocking module and the outer cylinder, and the liquid channel activation module is connected to the outer cylinder unlocking module;

As shown in Fig. 1 and Fig. 2, the liquid channel starting module includes a lock body 11, a locking rod 12, a starting shear pin 13, and a center rod 14. The sealing section A112 and the liquid passage section 113, the side wall of the locking section 111 has a starting shear pin hole, the starting shear pin hole is a through hole, the length of the starting shear pin 13 is greater than the depth of the starting shear pin hole, the locking rod 12 runs through the front and back, and the locking rod 12 is in the Inside the lock body 11, the locking rod 12 is sequentially connected section 121, outflow section A122, sealing section B123 and inflow section A124 from back to front. The outer wall of the section 121 has a starting shear pin groove, and the starting shear pin groove is an annular groove. The starting shear pin 13 is in the starting shear pin hole and the starting shear pin groove. There are inflow holes 1241, outflow holes A1221 are inclined forward from inside to outside, there are multiple outflow holes A1221, and the multiple outflow holes A1221 are evenly distributed along the circumference at the same axial position, there are multiple inflow holes 1241, and the inflow holes 1241 are on different sides. Distribution, the inner diameter of the locking section 111 is larger than the inner diameter of the sealing section A112, the outer wall of the connecting section 121 has a step, the outer diameter of the step is larger than the inner diameter of the sealing section A112, the outer diameter of the front of the connecting section 121 step is equal to the inner diameter of the sealing section A112, the starting shear pin groove is on the outer wall of the step, and the center The rod 14 is inside the locking rod 12, the sealing section A112 is in sealing fit with the sealing section B123, the inner diameter of the liquid channel section 113 is larger than the outer diameter of the locking rod 12, the inner diameters of the connecting section 121, the outflow section A122 and the inflow section A124 are larger than the outer diameter of the central rod 14, The sealing section B123 is in sealing fit with the central rod 14, the axial distance from the front end of the sealing section A112 to the rear end of the lock body 11 is smaller than the axial distance from the front end of the sealing section B123 to the rear end of the lock body 11, and the starting shear pin 13 is inserted into the starting shear pin hole to start The shear pin groove, the axial distance from the opening of the outer wall of the outflow hole A1221 to the rear end of the lock body 11 is less than the axial distance from the rear end of the liquid channel section 113 to the rear end of the lock body 11, and also includes a lock nut 15, which is on the lock body 11 At the rear, lock nut 15 runs through front and back, center rod 14 passes through lock nut 15 inner cavity, lock nut 15 front end is threadedly connected with lock body 11 rear end, and starting shear pin hole is opened at lock body 11 rear end thread place, lock The radial distance from the inner wall of the tight nut 15 to the bottom of the groove of the starting shear pin is not less than the length of the starting shear pin. The locking nut 15 includes a fixed section 151 and a threaded section 152. The outer diameter behind the step of the connecting section 121 is smaller than the inner diameter of the fixed section 151. diameter, the inner diameter of the threaded section 152 is equal to the outer diameter of the locking section 111, the locking nut 15 has a locking hole A in the axial direction, and the locking hole A is a through hole, and the rear end surface of the lock body 11 has a locking hole B, and the locking hole B is Blind hole, locking hole A and locking hole B are paired, and also includes a fixing screw 16, the length of the fixing screw 16 is greater than the depth of the locking hole A, the fixing screw 16 is in the locking hole A, and the front end of the fixing screw 16 passes through the locking hole A is embedded in the locking hole B. After starting, the locking lever 12 moves forward, and the starting shear pin 13 is cut off. The starting shear pin head is in the starting shear pin hole, and the starting shear pin tail is in the starting shear pin groove. Big head and small head, the big head faces outward, the outer diameter of the big head is larger than the outer diameter of the small head, the hole of the starting shear pin includes the outer section and the inner section, the diameter of the outer section is not smaller than the outer diameter of the big head of the starting shear pin head, and the hole diameter of the inner section is not smaller than that of the starting shear pin The outer diameter of the small head is small, the diameter of the inner section is smaller than the outer diameter of the big head, the depth of the outer section is not less than the length of the big head, and the sum of the length of the small head and the tail of the starting shear pin is greater than the depth of the inner section;

As shown in Figure 3 and Figure 4, the outer cylinder unlocking module includes a connecting pipe 21 and a lock pin 22, the rear end of the connecting pipe 21 is threaded with the lock body 11, the rear end of the lock pin 22 is threaded with the locking rod 12, and the central rod 14 is threaded. Through the inner cavity of the locking pin 22, the outer diameter of the central rod 14 is smaller than the inner diameter of the locking pin 22, the central rod 14, the connecting pipe 21, the outer cylinder 23 and the locking pin 22 are coaxial, the locking pin 22 is inside the connecting pipe 21, and the front part of the connecting pipe 21 is outside The diameter is smaller than the inner diameter of the outer cylinder 23. There are unlocking holes on the side wall of the front section of the connecting pipe 21. There are multiple unlocking holes. The unlocking holes are evenly distributed along the circumference at the same axial position. There is groove B231, groove A221 and groove B231 are annular grooves, also includes pin 24, the length of pin 24 is greater than the depth of the unlocking hole, pin 24 is in the unlocking hole, the outer end of pin 24 is chamfered, and the side of groove B231 is The angle between the chamfer of the outer end of the pin 24 and the radial section and the angle between the side of the groove B231 and the radial section are complementary, the width of the groove A221 is not less than the width of the inner end of the pin 24, and the width of the groove B231 is not less than the width of the pin 24 The width of the outer end. The pin 24 includes the nail head and the nail body. The nail head is on the inside. The unlocking hole is divided into the nail head section and the nail body section. The nail head section is included. Not less than the outer diameter of the nail body, the length of the nail head is less than the depth of the nail head section, the length of the nail body is greater than the depth of the nail body section, after starting, the inner end of the pin 24 is embedded in the groove A221, and the distance from the inner end surface of the pin 24 to the inner wall of the outer cylinder 23 is greater than that of the pin 24 lengths.

The connecting pipe 21 includes a connecting section 211, a pressure relief section 212 and a flow blocking section 213 from back to front. There is a pressure relief hole 2121, the pressure relief hole 2121 is a through hole, the inner wall of the lock body 11 is radially provided with an end shear pin hole, and there is an end shear pin 25 in the end shear pin hole, the length of the end shear pin 25 is greater than the depth of the end shear pin hole , also includes a shearing plunger 26, the inner diameter of the shearing plunger 26 is greater than the outer diameter of the locking pin 22 and the locking rod 12, and the shearing plunger 26 includes a shearing section 261 and a recoil section 262 from back to front, and the shearing section 261 The outer wall is sealed with the inner wall of the lock body 11. The inner wall of the lock body 11 is provided with a sealing groove B, and there is a sealing ring in the sealing groove B. The sealing groove B is in front of the end shear pin hole. The outer diameter of the recoil section 262 is equal to the pressure relief section 212 for pressure relief. The inner diameter of the front part of the hole 2121, the outer wall of the recoil section 262 is provided with a sealing groove A, and there is a sealing ring in the sealing groove A, the outer wall of the shearing section 261 is provided with an end shear pin groove, and the outer wall of the connecting pipe 21 is provided with a diversion groove, and the diversion groove Directly in front of the pressure relief hole 2121, the diversion groove is arranged axially, and the diversion groove communicates with the pressure relief hole 2121. 212 pressure relief holes 2121 front parts are sealed and fit, and the end shear pin 25 inner end is embedded in the end shear pin groove. After stopping drilling, the recoil section 262 front end is behind the pressure relief hole 2121 front end, and the end shear pin 25 is cut off.

As shown in Figure 5 and Figure 6, the blocking module includes a valve housing 31, a lock housing 32, a locking sleeve 33 and a fixing ring 35, a central rod 14, a valve housing 31, a lock housing 32, a locking sleeve 33, a fixing ring The ring 35 is coaxial with the outer cylinder 23, the central rod 14 passes through the inner cavity of the valve housing 31, the valve housing 31 is inside the lock housing 32, the lock housing 32 passes through the inner cavity of the locking sleeve 33, and the valve housing 31 is from the rear to the The front includes a sealing section C311, a diversion section 312 and a locking section A313, the outer wall of the locking section A313 has a locking groove A, and the lock housing 32 includes an inflow section B321, an outflow section B322 and a locking section B323 from back to front , the inner diameter of the inflow section B322 is greater than the outer diameter of the sealing section C311, the outer diameter of the sealing section C311 is greater than the outer diameter of the diversion section 312, the inner diameter of the outflow section B322 is equal to the outer diameter of the sealing section C311, and the outflow section B322 has an outflow hole B3221, the lock There is a locking hole on the tight section B323, the outflow hole B3221 and the locking hole are both through holes, and there is a locking ball 34 in the locking hole, the diameter of the locking ball 34 is larger than the depth of the locking hole, and the locking sleeve 33 is from back to front Including the impact section 331 and the locking section C332, the inner wall of the locking section C332 has a locking groove B, the distance from the bottom of the locking groove A to the inner wall of the locking section B323 is smaller than the diameter of the locking ball 34, and the locking groove A The distance from the bottom of the groove to the outer wall of the locking section B323 is not less than the diameter of the locking ball 34, the distance from the bottom of the locking groove B to the outer wall of the locking section B323 is less than the diameter of the locking ball 34, and the bottom of the locking groove B is to The distance of the inner wall of the locking section B323 is not less than the diameter of the locking ball 34. The fixing ring is fixed on the outer wall of the locking section B, the fixing ring 35 is behind the locking hole, the inner diameter of the impact section 331 is greater than the outer diameter of the fixing ring 35, and the locking section C332 is in front of the fixed ring 35, and the inner diameter of the outer cylinder 23 is larger than the outer diameter of the lock shell 32 and the lock sleeve 33. The inner wall of the outer cylinder 23 is connected with a safety gear 232, and the safety gear 232 includes a clamping part 2321 and an extrusion from back to front. The pressure part 2322, the inner diameter of the front end surface of the extrusion part 2322 is smaller than the outer diameter of the impact section 331, the inner diameter of the extrusion part 2322 is not smaller than the outer diameter of the fixing ring 35, the inner diameter of the front end surface of the clamping part 2321 is smaller than the outer diameter of the rear end surface of the fixing ring 35, and the central rod 14 The front end connects the limiter 36, the limiter 36 is in the locking section B323, the limiter is in front of the 36 locking section A313, the gap between the outer wall of the limiter 36 and the inner wall of the lock housing 32 is smaller than the thickness of the front end of the locking section A313, and the card The axial distance from the front end of the tightening part 2321 to the front end of the extruding part 2322 is equal to the axial distance from the center of the locking hole to the center of the locking groove B before the drilling is stopped, and the distance between the rear end of the sealing section C311 and the rear end of the outflow hole B3221 before the drilling is stopped The distance is greater than the axial distance from the center of the locking hole to the center of locking groove A after the drilling is stopped, and the axial distance from the center of the locking hole to the center of the locking groove A after the drilling is stopped is greater than the front end of the sealing section C311 to the outflow hole before the drilling is stopped The distance between the front end of B3221, the lock housing 32 and the valve housing 31 are locked or released by the locking ball 34, the lock housing 32 and the locking sleeve 33 are locked or released by the locking ball 34, and the snap ring 37 is also included. The outer diameter of the ring 37 is larger than the inner diameter of the fixed ring 35, the inner diameter of the snap ring 37 is smaller than the inner diameter of the fixed ring 35, the snap ring 37 is embedded in the slot on the outer wall of the locking section B323, and the fixed ring 35 is snapped on the rear end of the snap ring 37 and the front end of the outflow section B322 Between them, the front end of the locking section C332 is supported by a spring. Before the drilling is stopped, the lock housing 32 and the valve housing 31 are locked to keep the fluid channel unobstructed. The safety gear 232 is built in the outer cylinder 23. When the outer cylinder 23 moves forward to a limited position, The outer cylinder 23 drives the safety gear 232 to strike the locking sleeve 33, so that the locking ball 34 moves outward, and the constraint on the valve housing 31 is released, and the valve housing 31 moves forward to close the liquid flow channel and stop drilling.

The inner wall of the connecting section 121, the inner wall of the outflow section A122, the rear end surface of the sealing section B123 and the outer wall of the central rod 14 form a liquid passage A41, the inner wall of the lock body 11 and the outer wall of the locking rod 12 form a liquid passage B42, and the inner wall of the locking rod 12 and the outer wall of the central rod 14 The wall forms a liquid channel C43, the inner wall of the lock pin 22 and the outer wall of the center rod 14 form a liquid channel D44, the liquid channel B42 communicates with the liquid channel C43 through the inflow hole 1241, the liquid channel C43 communicates with the liquid channel D44, and the rear of the liquid channel A41 communicates with the supply chain. Liquid equipment, the front of the outflow hole B3221 is connected to the working equipment.

Before starting, the starting shear pin 13 is inserted into the starting shear pin groove through the starting shear pin hole, the locking rod 12 is fixed in the lock body 11 by the starting shear pin 13, and the axial distance from the opening of the outer wall of the outflow hole A1221 to the rear end of the lock body 11 is less than the liquid The axial distance from the rear end of the road section 113 to the rear end of the lock body 11, the outer wall opening of the outflow hole A1221 is closed by the sealing section A112, the liquid cannot flow forward, the front end of the connecting pipe 21 is inside the outer cylinder 23, the pin 24 is in front of the groove A221, and the pin 24 is in front of the groove A221. The inner end surface of 24 slides and fits with the outer wall of lock pin 22, the outer end of pin 24 is embedded in the groove B231, and the outer cylinder 23 is fixed outside the connecting pipe 21 through pin 24. After the hydraulic pressure provided by the rear mud pump reaches the starting value, the lock lever 12 is impacted. cut off the starting shear pin 13, the starting shear pin 13 is broken into the starting shear pin head and the starting shear pin tail, the starting shear pin head is in the starting shear pin hole, the starting shear pin tail is in the starting shear pin groove, and the locking lever 12 Move forward, the axial distance from the opening of the outer wall of the outflow hole A1221 to the rear end of the lock body 11 is greater than the axial distance from the rear end of the liquid passage section 113 to the rear end of the lock body 11, the liquid passage A41 communicates with the liquid passage B42 through the outflow hole A1221, and the liquid passage A41 , liquid channel B42, liquid channel C43, and liquid channel D44 are connected, the liquid channel D44 is connected to the hydraulic motor through the outflow hole B3221, and the hydraulic pressure provided by the liquid supply equipment behind the liquid channel A41 passes through the liquid channel A41, the liquid channel Road D44 transmits to the front hydraulic motor and drill bit, drives the motor, cools the drill bit, and the locking rod 12 drives the locking pin 22 to move forward, and the inner end of the pin 24 slides and cooperates with the outer wall of the locking pin 22. When the groove A221 slides forward to be in the At the same axial position, the outer cylinder 23 uses its own gravity to generate forward pressure, the contact surface between the groove B231 and the pin 22 is a slope, the groove B231 squeezes the slope of the pin 24, the pin 24 withdraws from the groove B231, and is pressed Into the groove A221, the constraint of the outer cylinder 23 is released, and the outer cylinder 23 drives the working parts connected in front to move forward.

The front of the outer cylinder 23 is connected to the hydraulic motor rotor and the drill bit. When the drilling rig is working, the outer cylinder 23 moves from back to front, and the liquid flows into the liquid passage D44 through the liquid passage A41, the liquid passage B42, and the liquid passage C43, and the liquid passage D44 is connected through the outflow hole B3221 The front hydraulic motor, the locking ball 34 is in the locking groove A and the locking hole, restricting the forward movement of the valve housing 31, the outer cylinder 23 drives the safety gear 232 to move forward, and after the outer cylinder 23 moves to the limited position, the safety gear 232 hits The locking sleeve 33 makes the locking groove B face the locking hole, the liquid in the liquid channel D44 impacts the rear end of the valve housing 31, squeezes the locking ball 34 into the locking groove B, and the valve housing 31 releases the restraint. Moving forward, the sealing section C311 moves into the outflow section B322, blocking the passage between the liquid passage D44 and the outflow hole B3221, cutting off the liquid passage, the motor stops rotating, the liquid regurgitates, flows back to the liquid passage B42, and recoils. Segment 262 moves the recoil segment 262 backward, cuts off the shear pin 25, communicates with the passage of the liquid channel B42 and the pressure relief hole 2121, and releases pressure through the pressure relief hole 2121.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes All changes and modifications should belong to the scope of protection of the appended claims of the present invention.

Claims (8)

1. An automatic start-stop mechanism for a core drilling rig, characterized in that it includes a central rod (14), a liquid channel activation module, an outer cylinder (23), an outer cylinder unlocking module and a flow blocking module, and the central rod (14) passes through the The liquid channel activation module, the outer cylinder unlocking module and the inner chamber of the blocking module, the liquid channel activation module is behind the outer cylinder unlocking module and the outer cylinder (23), and the liquid channel activation module is connected to the outer cylinder unlocking module; The blocking module includes a valve housing (31), a lock housing (32) and a trigger mechanism. The central rod (14) passes through the inner cavity of the valve housing (31), and the valve housing (31) is connected to the lock housing (32). Inside, the valve housing (31) includes a sealing section C (311) and a flow guide section (312) from back to front, and the lock housing (32) includes an inflow section B (321) and an outflow section B (322) from back to front , there is a liquid channel D (44) between the central rod (14) and the inflow section B (321), the rear end of the liquid channel D (44) communicates with the liquid channel B (42), and the inner diameter of the inflow section B (321) is larger than the sealing section The outer diameter of C (311), the outer diameter of the sealing section C (311) is greater than the outer diameter of the diversion section (312), the inner diameter of the outflow section B (322) is equal to the outer diameter of the sealing section C (311), and the outflow section B (322) There is an outflow hole B (3221), and the outflow hole B (3221) is connected to the working parts. Before the drilling is stopped, the front end of the sealing section C (311) is in the inflow section B (321), and the liquid channel D (44) and the outflow hole B (3221 ) is connected, after the drilling is stopped, the sealing section C (311) is sealed with the outflow section B (322), and the liquid channel D (44) is cut off from the outflow hole B (3221); Also includes lock nut (15), lock nut (15) is behind the lock body (11), lock nut (15) runs through front and back, center rod (14) passes through lock nut (15) inner chamber, locks The front end of the nut (15) is threadedly connected with the rear end of the lock body (11), and the starting shear pin (13) passes through the threaded part of the rear end of the lock body (11). 2. The automatic start-stop mechanism of the core drilling rig according to claim 1, characterized in that: the liquid channel start module includes a lock body (11), a lock lever (12), a start shear pin (13), a lock lever ( 12) In the lock body (11), the locking rod (12) and the lock body (11) are connected through the starting shear pin (13), the central rod (14) is in the locking rod (12), and the lock body (11) Including the sealing section A (112), the locking rod (12) includes the sealing section B (123), the sealing section A (112) is sealed with the sealing section B (123), and the sealing section B (123) is in contact with the central rod (14) Seal fit, there is a liquid channel A (41) between the center rod (14) and the locking rod (12), the locking rod (12) has an outflow hole A (1221), and the outflow hole A (1221) communicates with the liquid channel A (41), the outflow hole A (1221) is behind the sealing section B (123), there is a liquid passage B (42) between the lock body (11) and the locking rod (12), and the liquid passage B (42) is in the sealing section A (112) in front, before the start shear pin (13) is cut off, the outlet of the outflow hole A (1221) is at the sealing section A (112), the front end of the liquid channel A (41) is sealed, and after the start shear pin (13) is cut off, the locking lever (12) Move forward, the outlet of the outflow hole A (1221) is located in front of the sealing section A (112), and the liquid channel A (41) communicates with the liquid channel B (42) through the outflow hole A (1221). 3. The automatic start-stop mechanism of the core drilling rig according to claim 2, characterized in that: the unlocking module of the outer cylinder includes a connecting pipe (21) and a lock pin (22), and the rear end of the connecting pipe (21) and the lock body (11) connection, the rear end of the lock pin (22) is connected with the lock rod (12), the central rod (14) passes through the inner cavity of the lock pin (22), the lock pin (22) is inside the connecting pipe (21), and the connecting pipe (21) The outer diameter of the front section is smaller than the inner diameter of the outer cylinder (23), the side wall of the front section of the connecting pipe (21) has an unlocking hole, the outer wall of the lock pin (22) has a groove A (221), and the inner wall of the outer cylinder (23) There is a groove B (231), and also includes a pin (24), the length of the pin (24) is greater than the depth of the unlocking hole, the pin (24) is in the unlocking hole, and the outer end of the pin (24) is chamfered and/or grooved The side of B (231) is a slope, the width of groove A (221) is not less than the width of the inner end of the pin (24), the width of groove B (231) is not less than the width of the outer end of the pin (24), start the shear pin (13) Before cutting, the front end of the connecting pipe (21) is inside the outer cylinder (23), the pin (24) is in front of the groove A (221), the inner end surface of the pin (24) slides and fits with the outer wall of the locking pin (22), and the outer wall of the pin (24) end is embedded in groove B (231), and after the start shear pin (13) is cut off, the locking lever (12) drives the lock pin (22) to move forward, the unlocking hole is facing the groove A (221), and the pin (24) inside The end is embedded in the groove A (221), and the distance from the inner end surface of the pin (24) to the inner wall of the outer cylinder (23) is greater than the length of the pin (24). 4. The automatic start-stop mechanism of the core drilling rig according to claim 1, characterized in that: the valve housing (31) also includes a locking section A (313), the locking section A (313) and the diversion section (312) front end connection, the lock housing (32) also includes a locking section B (323), the locking section B (323) is connected to the front end of the outflow section B (322), and the inner wall of the outer cylinder (23) is connected with Safety gear (232), the trigger mechanism includes locking sleeve (33), fixed ring (35), safety gear (232), locking section A (313) and locking section B (323), lock housing (32 ) through the inner cavity of the locking sleeve (33), the outer wall of the locking section A (313) has a locking groove A, and the locking section B (323) has a locking hole, the locking hole is a through hole, and the locking There is a locking ball (34) in the tight hole, and the diameter of the locking ball (34) is larger than the depth of the locking hole. The locking sleeve (33) includes an impact section (331) and a locking section C (332) from back to front, and the lock There is a locking groove B on the inner wall of the tight section C (332), the fixed ring (35) is fixed on the outer wall of the locked section B (323), the fixed ring (35) is behind the locking hole, and the inner diameter of the impact section (331) is larger than The outer diameter of the fixed ring (35), the locking section C (332) is in front of the fixed ring (35), the safety gear (232) includes the clamping part (2321) and the extruding part (2322) from back to front, and the extruding part The inner diameter of the front end of (2322) is smaller than the outer diameter of the impact section (331), the inner diameter of the extrusion part (2322) is not smaller than the outer diameter of the fixing ring (35), and the inner diameter of the front end of the clamping part (2321) is smaller than the outer diameter of the rear end of the fixing ring (35) Diameter, the front end of the center rod (14) is connected with the limit head (36), the limit head (36) is inside the locking section B (323), the limit head (36) is in front of the locking section A (313), clamp The axial distance from the front end surface of the extrusion part (2321) to the front end surface of the extrusion part (2322) is equal to the axial distance from the center of the locking hole to the center of the locking groove B before the drilling is stopped, and the rear end of the sealing section C (311) before the drilling is stopped The distance to the rear end of the outflow hole B (3221) is greater than the axial distance from the center of the locking hole to the center of the locking groove A after the drilling is stopped, and the axial distance from the center of the locking hole to the center of the locking groove A is greater than the center of the locking groove A after the drilling is stopped. The distance from the front end of the sealing section C (311) to the front end of the outflow hole B (3221) before drilling. 5. The automatic start-stop mechanism of the core drilling rig according to claim 4, characterized in that there is a liquid channel C (43) between the center rod (14), the lock pin (22) and the lock rod (12), There is an inflow hole (1241) on the side wall of the locking rod (12), the liquid channel B (42) and the liquid channel C (43) are connected through the inflow hole (1241), and the liquid channel C (43) is connected with the liquid channel D (44) , the connecting pipe (21) includes a pressure relief section (212) and a flow blocking section (213) from back to front, the lock pin (22) is tightly matched with the flow blocking section (213), and the inner diameter of the flow blocking section (213) is smaller than the pressure relief section section (212), the pressure relief section (212) has a pressure relief hole (2121), and the pressure relief hole (2121) is a through hole, and there is a shear plunger (26) in the liquid channel B (42), and the shear column The inner diameter of the plug (26) is greater than the outer diameter of the lock pin (22) and the locking rod (12), and the shear plunger (26) is connected with the lock body (11) by ending the shear pin (25), and the shear plunger (26) is From back to front, it includes the shearing section (261) and recoil section (262). The outer wall of the shearing section (261) is in sealing fit with the inner wall of the lock body (11), and the outer diameter of the recoil section (262) is equal to that of the pressure relief section (212). The inner diameter of the front part of the pressure relief hole (2121), before the drilling stops, the front end of the recoil section (262) is in front of the front end of the pressure relief hole (2121), the recoil section (262) and the pressure relief section (212) pressure relief hole (2121) The front part is sealed and fit. After the drilling is stopped, the front liquid backflow impacts the front end of the shear plunger (26), and the shear plunger (26) moves backward. The front end of the recoil section (262) is behind the front end of the pressure relief hole (2121). Road B (42) communicates with the pressure relief hole (2121). 6. The automatic start-stop mechanism of the core drilling rig according to claim 2, characterized in that: the outer wall of the locking rod (12) and the inner wall of the lock body (11) have limit steps that cooperate with each other. 7. The automatic start-stop mechanism of the core drilling rig according to claim 1, characterized in that: the lock nut (15) includes a fixed section (151) and a threaded section (152), and the locking rod (12) outside the step rear Diameter is less than fixed section (151) internal diameter, and fixed section (151) internal diameter is less than locking rod (12) step outer diameter, and threaded section (152) is connected with lock body (11) rear end. 8. The automatic start-stop mechanism of the core drilling rig according to claim 1, characterized in that: the locking nut (15) has a locking hole A in the axial direction, the locking hole A is a through hole, and the lock body (11) There is a locking hole B on the rear end surface, and the locking hole B is a blind hole. The locking hole A and the locking hole B are paired together, and the fixing screw (16) is also included. The length of the fixing screw (16) is greater than the depth of the locking hole A , the fixing screw (16) is in the locking hole A, and the front end of the fixing screw (16) passes through the locking hole A and is embedded in the locking hole B.

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