Insert impact device for core sampling

FIELD: mining engineering.

SUBSTANCE: core sampling device comprises a rotating tubular body, a core bit fixed for rotation with the body and axially movable relative to the rotating tubular body, a retrievable core assembly, configured to be fixed to the rotating tubular body or relative thereof. The retrievable core sampling assembly comprises a stem of the core grabber for the core, made separate from the tubular body to avoid rotation with it and working in conjunction with the core bit for holding the core and a percussion device to provide impact on the core bit according to the longitudinal impact transmission system, disconnected or substantially disconnected from core grabber stem. The pipe body is made with bit rotation function. The impact device is designed with the capability to apply impacts on the bit to retrieve and deliver core material from the formation to the core grabber stem in core stem insulation mode to guard from rotational and impact forces.

EFFECT: accelerated sampling of high-quality core samples.

10 cl, 4 dwg

 



 

Same patents:

FIELD: mining.

SUBSTANCE: fixing device comprises at least one latch made as capable of detachable retention of an insert device in a substantially fixed axial position relative to an outer pipe, a cam and a tracking element designed to control radial position of the latch. Besides, the latch at its first longitudinal edge is equipped with an engagement surface adapted for engagement of the latch seat, has the second longitudinal edge opposite to the first longitudinal edge, and is made as capable of rotation around the axis of rotation on the first end of the latch, and a cam is installed on a substantially opposite second end of the latch in the axial direction and has a withdrawal surface, along which the tracking element may move to withdraw the latch in order to unfix the insert device from the external pipe. Besides, the withdrawal surface stretches from the near section of the cam to the far section of the cam, and the tracking element is made as capable of displacement relative to the withdrawal surface from the first end of the cam nearest to the axis of rotation to the second end of the cam, the furthest from the axis of rotation. The withdrawal surface on the second end of the cam is arranged closer to the first longitudinal edge than in any other point on the cam, and the cam and the tracking element are arranged so that the highest value of the ratio between substantially transverse force acting for movement of the latch from the fixation position and substantially axial force acting to move the insert device in the axial direction relative to the external pipe, is achieved in the start or near the start of movement substantially in axial direction between the cam and the tracking element.

EFFECT: possibility to move displacement and withdrawing force on latches.

22 cl, 8 dwg

Well drilling rig // 2304692

FIELD: drilling, particularly well drilling along with core taking with the use of removable sampling barrels.

SUBSTANCE: drilling rig comprises drill string with rock-cutting tool, removable sampling barrel having body with stop mechanism, stop mechanism drive and overshot. Above components are located in the body. The stop mechanism retains sampling barrel in working position. Stop mechanism drive has conical mushroom member and head to cooperate with stop mechanism. The overshot comprises blocking bush and spring-loaded double-armed levers carried by common axle. Upper arm of each lever is provided with boring for blocking bush receiving. Lower arm has leg and thrust arranged between axle and leg. The thrust is adapted to cooperate with conical mushroom member. Upper body part has cone to cooperate with overshot legs in working position.

EFFECT: possibility to obtain reliable information concerning stop mechanism actuation and, hence, provision of sample obtaining from wells drilled without flushing fluid usage.

2 dwg

Core sampling tool // 2297513

FIELD: oil and gas industry, particularly drilling and sample taking devices.

SUBSTANCE: core sampling tool comprises body with upper sub, crown with boring, core receiver made as pipe provided with rotary support and adjustable suspension bracket in upper part thereof. The suspension bracket has retaining ring, adjusting screw connected to axis of rotary support and nut cooperating with the adjusting screw. Circulation orifices are made in the nut. Additional pipe is installed in the core receiver so that the pipe may slide in longitudinal direction. The additional pipe is provided with partition, which cooperates with core coming into the pipe. Core releasing unit comprises shoe connected to core receiver and lever-type core cutter arranged in the shoe. The core cutter comprises body and spring-loaded short and long rotary levers installed in the diametrical body plane. Core releasing unit has sleeve installed in the core cutter body and performing longitudinal movement. Lower sleeve part is made as resilient split collet provided with ledges made on outer surface thereof. The ledges cooperate with lower end of core cutter. Upper sleeve part has ledge on outer surface thereof, is connected to lower part of additional pipe and cooperates with upper end of core cutter body by ledge. Core cutter levers are located in different diametric planes, wherein short levers are over long ones. Upper sub has gate assembly, which indexes core wedging and comprises fixed bush with side and central circulation orifices. Movable bush is slidably installed in upper sub boring. Core receiver is provided with core wedging prevention mechanism made as one or several wedge-like projections arranged on lower end of core receiver suspension bracket nut and located around a circle and as one or several mating similar wedge-like projections formed on upper end of rotary support body and cooperating with them. Rotary support axis is made as stepped bush installed on adjusting screw and sliding in longitudinal direction. The rotary support axis is provided with compression spring having spring force smaller than that of compression spring included in the gate assembly. Distance between lower end of core receiver suspension bracket nut and upper end of rotary support exceeds doubled wedge-like projection height.

EFFECT: improved core removal and reliability of core separation from hole face.

9 dwg

FIELD: well drilling, particularly to drill loose rock in water areas along with simultaneous core taking and well casing.

SUBSTANCE: method involves applying force to sealing member of removable core receiver to retain sealing member in its lower extreme position, wherein above force is equal or greater than friction force appeared during sealing member movement along removable core receiver. Drilling tool comprises drilling tool having cylindrical spiral spring 24 put on ejector pump body 13 between sliding sealing bush 23 and fungiform member 21 adapted to receive fishing member of removable core receiver. The spring has initial inter-coil pressure equal or greater than friction force between movable sealing bush 23 and body 13 of ejector pump.

EFFECT: increased core receiver fixation reliability inside casing pipe.

3 cl, 2 dwg

The invention relates to the oil and gas industry and can be used to retrieve installed or emergency left in the wells of the devices having a shank for car safety

The invention relates to mining, particularly to core sets with removable wireline and rock cutting tool

Core shell // 2134768
The invention relates to the field of well drilling with coring and represents the core, the shell comprising means for preventing direct contact of personnel in the process of manipulating filled with radioactive core karnaprayag and by the core columns when you retrieve them from the wireline and laying in a transport container

Removable sampler // 2114979
The invention relates to drilling equipment and is designed for coring small diameter, including, for selection of the radioactive core in horizontal drilling

FIELD: well drilling, particularly to drill loose rock in water areas along with simultaneous core taking and well casing.

SUBSTANCE: method involves applying force to sealing member of removable core receiver to retain sealing member in its lower extreme position, wherein above force is equal or greater than friction force appeared during sealing member movement along removable core receiver. Drilling tool comprises drilling tool having cylindrical spiral spring 24 put on ejector pump body 13 between sliding sealing bush 23 and fungiform member 21 adapted to receive fishing member of removable core receiver. The spring has initial inter-coil pressure equal or greater than friction force between movable sealing bush 23 and body 13 of ejector pump.

EFFECT: increased core receiver fixation reliability inside casing pipe.

3 cl, 2 dwg

Core sampling tool // 2297513

FIELD: oil and gas industry, particularly drilling and sample taking devices.

SUBSTANCE: core sampling tool comprises body with upper sub, crown with boring, core receiver made as pipe provided with rotary support and adjustable suspension bracket in upper part thereof. The suspension bracket has retaining ring, adjusting screw connected to axis of rotary support and nut cooperating with the adjusting screw. Circulation orifices are made in the nut. Additional pipe is installed in the core receiver so that the pipe may slide in longitudinal direction. The additional pipe is provided with partition, which cooperates with core coming into the pipe. Core releasing unit comprises shoe connected to core receiver and lever-type core cutter arranged in the shoe. The core cutter comprises body and spring-loaded short and long rotary levers installed in the diametrical body plane. Core releasing unit has sleeve installed in the core cutter body and performing longitudinal movement. Lower sleeve part is made as resilient split collet provided with ledges made on outer surface thereof. The ledges cooperate with lower end of core cutter. Upper sleeve part has ledge on outer surface thereof, is connected to lower part of additional pipe and cooperates with upper end of core cutter body by ledge. Core cutter levers are located in different diametric planes, wherein short levers are over long ones. Upper sub has gate assembly, which indexes core wedging and comprises fixed bush with side and central circulation orifices. Movable bush is slidably installed in upper sub boring. Core receiver is provided with core wedging prevention mechanism made as one or several wedge-like projections arranged on lower end of core receiver suspension bracket nut and located around a circle and as one or several mating similar wedge-like projections formed on upper end of rotary support body and cooperating with them. Rotary support axis is made as stepped bush installed on adjusting screw and sliding in longitudinal direction. The rotary support axis is provided with compression spring having spring force smaller than that of compression spring included in the gate assembly. Distance between lower end of core receiver suspension bracket nut and upper end of rotary support exceeds doubled wedge-like projection height.

EFFECT: improved core removal and reliability of core separation from hole face.

9 dwg

Well drilling rig // 2304692

FIELD: drilling, particularly well drilling along with core taking with the use of removable sampling barrels.

SUBSTANCE: drilling rig comprises drill string with rock-cutting tool, removable sampling barrel having body with stop mechanism, stop mechanism drive and overshot. Above components are located in the body. The stop mechanism retains sampling barrel in working position. Stop mechanism drive has conical mushroom member and head to cooperate with stop mechanism. The overshot comprises blocking bush and spring-loaded double-armed levers carried by common axle. Upper arm of each lever is provided with boring for blocking bush receiving. Lower arm has leg and thrust arranged between axle and leg. The thrust is adapted to cooperate with conical mushroom member. Upper body part has cone to cooperate with overshot legs in working position.

EFFECT: possibility to obtain reliable information concerning stop mechanism actuation and, hence, provision of sample obtaining from wells drilled without flushing fluid usage.

2 dwg

FIELD: mining.

SUBSTANCE: fixing device comprises at least one latch made as capable of detachable retention of an insert device in a substantially fixed axial position relative to an outer pipe, a cam and a tracking element designed to control radial position of the latch. Besides, the latch at its first longitudinal edge is equipped with an engagement surface adapted for engagement of the latch seat, has the second longitudinal edge opposite to the first longitudinal edge, and is made as capable of rotation around the axis of rotation on the first end of the latch, and a cam is installed on a substantially opposite second end of the latch in the axial direction and has a withdrawal surface, along which the tracking element may move to withdraw the latch in order to unfix the insert device from the external pipe. Besides, the withdrawal surface stretches from the near section of the cam to the far section of the cam, and the tracking element is made as capable of displacement relative to the withdrawal surface from the first end of the cam nearest to the axis of rotation to the second end of the cam, the furthest from the axis of rotation. The withdrawal surface on the second end of the cam is arranged closer to the first longitudinal edge than in any other point on the cam, and the cam and the tracking element are arranged so that the highest value of the ratio between substantially transverse force acting for movement of the latch from the fixation position and substantially axial force acting to move the insert device in the axial direction relative to the external pipe, is achieved in the start or near the start of movement substantially in axial direction between the cam and the tracking element.

EFFECT: possibility to move displacement and withdrawing force on latches.

22 cl, 8 dwg

FIELD: mining engineering.

SUBSTANCE: core sampling device comprises a rotating tubular body, a core bit fixed for rotation with the body and axially movable relative to the rotating tubular body, a retrievable core assembly, configured to be fixed to the rotating tubular body or relative thereof. The retrievable core sampling assembly comprises a stem of the core grabber for the core, made separate from the tubular body to avoid rotation with it and working in conjunction with the core bit for holding the core and a percussion device to provide impact on the core bit according to the longitudinal impact transmission system, disconnected or substantially disconnected from core grabber stem. The pipe body is made with bit rotation function. The impact device is designed with the capability to apply impacts on the bit to retrieve and deliver core material from the formation to the core grabber stem in core stem insulation mode to guard from rotational and impact forces.

EFFECT: accelerated sampling of high-quality core samples.

10 cl, 4 dwg

Up!