CN217632346U - Double-structure claw coring tool with jaw differential motion and adjustable gap - Google Patents
Double-structure claw coring tool with jaw differential motion and adjustable gap Download PDFInfo
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- CN217632346U CN217632346U CN202123398141.8U CN202123398141U CN217632346U CN 217632346 U CN217632346 U CN 217632346U CN 202123398141 U CN202123398141 U CN 202123398141U CN 217632346 U CN217632346 U CN 217632346U
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Abstract
The utility model discloses a double-structure claw coring tool in differential adjustable clearance of jaw, including differential assembly, locking and hang assembly, urceolus assembly, inner tube assembly, can shelter from two rock core claw structure assemblies, coring bit. When core drilling is carried out, the clamp type core claw is positioned between the blocking sleeve and the necking sleeve and does not directly contact the core. When the core needs to be cut, two core cutting modes of pressing and pulling up are adopted simultaneously, the differential assembly and the locking and hanging assembly firstly press down to cut off the cutting pin, the petal type retractable core claw contracts, the shielding sleeve is lifted up to expose the hoop type core claw, the differential assembly drives the inner sliding sleeve and the outer sliding sleeve to simultaneously move up, after the locking block touches the lower positioning joint, the inner sliding sleeve is continuously lifted up, the shielding sleeve is lifted out of the hoop type core claw, and the core pulling up and cutting process is completed.
Description
Technical Field
The utility model belongs to the technical field of the instrument in the oil and gas exploration and development well drilling and specifically relates to a double-structure claw coring tool in differential adjustable clearance of jaw.
Background
With the gradual decrease of land oil and gas resources, deep water oil development is becoming an option.
At present, the south China sea petroleum development gradually enters the deepwater field, and the domestic deepwater coring tool and the technical aspect matched with the south China sea petroleum development are still blank.
At present, the drilling and coring tool commonly used in China has an upward pulling coring tool suitable for hard strata and a mechanical pressurizing and hydraulic pressurizing coring tool suitable for unconsolidated strata, and a universal coring tool suitable for soft to hard strata is lacked.
The characteristics of deepwater coring operation are as follows:
1) Under the floating state of the floating drilling platform, the ship body moves up and down along with surge, and a coring bit is easy to separate from the bottom of a well, so that repeated core cutting is caused, and a rock core is not formed into a column;
2) The deepwater exploration area is lack of existing drilling data, stratum lithology is not clear, coring tool selection is difficult, and the probability of occurrence of coring is greatly increased due to the unsuitable coring tool;
3) The drilling cost is high, multi-cylinder continuous coring is required, and the coring tool needs to have higher reliability.
In general, a special coring tool matched with a deepwater operation floating platform and a related process technology are lacked in China.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems existing in the prior deepwater coring operation technology, providing a double-structure claw coring tool with a jaw differential adjustable gap suitable for deepwater coring, and simultaneously the utility model also provides a coring method using the tool.
The technical scheme of the utility model includes:
a jaw coring tool with double structures and differential adjustable gaps for a jaw comprises a differential assembly 100, a ball seat matched steel ball 200, a locking and hanging assembly 300, an outer cylinder assembly 400, an inner cylinder assembly 500, a shelterable double-core jaw structure assembly 600 and a coring bit 700; the differential assembly 100, the locking and hanging assembly 300, the outer cylinder assembly 400, the shelterable double-core claw structure assembly 600 and the coring bit 700 are sequentially connected from top to bottom, and the upper part of the inner cylinder assembly 500 is connected with the locking and hanging assembly 300.
Further, the shelterable double-core-jaw structure assembly 600 comprises an inner sliding sleeve 35, a lower positioning joint 37, an outer sliding sleeve 36, a lower locking block 38, a sheltering sleeve 40, a necking sleeve short section 39, a hoop-type core jaw 41, a necking sleeve 42 and a petal-type retractable core jaw 43;
the lower part of the inner cylinder assembly 500 is sequentially connected with the inner sliding sleeve 35 and the shielding sleeve 40;
the outer sliding sleeve 36 is sequentially connected with a necking sleeve short section 39, a necking sleeve 42 and a petal type retractable core claw 43;
the outer sliding sleeve 36 and the inner sliding sleeve 35 are fixedly connected through shear pins.
Further, the differential assembly 100 comprises a jaw upper joint 1, a 50 ball seat 3, a jaw inner positioning joint 4, a shearing fixing screw 5, a jaw lower joint 6, a gap adjusting inner joint 7, a gap adjusting outer joint 8, an adjustable gap inner rod 10 and a jaw locking block 44;
the upper part of the jaw upper connector 1 is connected with an upper drilling tool through a thread buckle, and the lower part of the jaw upper connector 1 is connected with the clearance adjusting outer connector 8 through a thread buckle;
the gap adjusting outer joint 8 is connected with the gap adjusting inner joint 7 through a threaded buckle;
the jaw inner positioning joint 4 is connected with the jaw upper joint 1 through a shearing fixing screw 5;
the gap adjusting inner joint 7 is connected with the gap adjustable inner rod 10 through a threaded buckle.
Further, the jaw upper joint 1 and the jaw lower joint 6 are matched with each other through splines, a jaw locking block 44 is arranged between the jaw upper joint 1 and the jaw lower joint 6, and the jaw locking block 44 axially limits the jaw upper joint 1 and the jaw lower joint 6.
Further, when the gap adjusting nipple 7 rotates, the relative position of the inner rod 10 and the outer cylinder 32 is kept unchanged, and the gap adjusting nipple 7 is movable in the axial direction relative to the outer cylinder.
Further, the locking and hanging assembly 300 comprises a 40-ball seat 12, a pressurizing rod 14, a telescopic head 13, a positioning joint 15, a locking block 16, an inner positioning joint 17, a pressure bearing seat 18, an upper shearing ring 20, an upper shearing screw 19, a lower shearing ring 22, a lower shearing screw 21, a bearing box 23, a hanging shaft 24, bearing rings 25, 19, a steel ball 26, a bearing support 27, a water diversion joint 28 and a 30-ball seat 31;
the positioning joint 15 is connected with the clearance adjusting inner joint 7 through a threaded buckle, the positioning joint 15 is connected with the inner positioning joint 17 through a locking block 16, the telescopic joint 13 is connected with the inner positioning joint 17 through a threaded buckle, the inner positioning joint 17 is connected with the pressure bearing seat 18 through a threaded buckle, the pressure bearing seat 18 is connected with the bearing box 23, the bearing box 23 is connected with the bearing support 27 through a threaded buckle, the hanging shaft 24 is connected with the water distribution joint 28 through a threaded buckle, and the water distribution joint 28 is connected with the ball seat 31 of the water distribution joint 30 through a threaded buckle;
the bearing box 23, the bearing ring 25, the bearing support 27, the 19 steel ball 26 and the suspension shaft 24 are combined together through the geometrical shapes of the bearing box, and the tool is pressed tightly by gravity when in use;
the upper shear ring 20 is connected with the pressure bearing seat 18 through an upper shear screw 19, and the lower shear ring 22 is connected with the pressure bearing seat 18 through a lower shear screw 21.
Further, the ball seat matching steel balls 200 comprise 30 steel balls 30, 40 steel balls 11 and 50 steel balls 2.
Furthermore, the diameters of the steel balls are equal to the diameters of the matched ball seats, and the diameters of the 30 steel balls 30, the 40 steel balls 11 and the 50 steel balls 2 are increased in sequence.
Further, the outer cylinder assembly 400 comprises an upper joint 9, an upper centralizer 29, an outer cylinder 32 and a lower centralizer 34 which are connected in sequence from top to bottom.
Further, the outer sliding sleeve 36 is provided with two key slots which are uniformly distributed and matched with the lower locking block 38;
the inner surface of the lower locking block 38 is matched with the shielding sleeve 40, the outer surface is matched with the lower positioning joint 37, and the outer diameter of the lower locking block is larger than the inner diameter of the lower positioning joint 37.
The utility model has the advantages that:
the repeated core cutting caused by deepwater operation is structurally avoided, and the core is prevented from being incapable of forming a column; under the condition that the lithology of the stratum is unknown, a universal coring tool suitable for soft to hard strata is provided; the effect that the tool has higher reliability when multi-cylinder continuous coring is performed in deepwater operation is realized.
Drawings
Fig. 1 is a general structural schematic diagram of the jaw coring tool with double structure of jaw differential and adjustable gap of the present invention.
Fig. 2 is a schematic view of the upper portion of the jaw core-removing tool with double structure and differential gap adjustment for jaw teeth of the present invention.
Fig. 3 is a schematic diagram of a middle part of the jaw core-removing tool with double structure and adjustable jaw gap according to the present invention.
Fig. 4 is a schematic structural view of the lower portion of the jaw coring tool with double structure and differential gap adjustment for jaw set of the present invention.
FIG. 5 isbase:Sub>A schematic sectional view of the structure A-A in FIG. 1.
FIG. 6 is a schematic sectional view of the structure of B-B in FIG. 1.
FIG. 7 is a schematic sectional view of the structure of C-C in FIG. 1.
Fig. 8 is a schematic sectional view of D-D in fig. 2.
In the figure:
100. a differential assembly, 200 ball seat matched steel balls, 300 locking and hanging assemblies, 400 outer barrel assemblies, 500 inner barrel assemblies, 600 shelterable double core claw structure assemblies, 700 coring bits, 1 jaw upper joint, 2.50 steel balls, 3.50 ball seats, 4 jaw inner positioning joints, 5 shearing fixing screws, 6 jaw lower joints, 7 gap adjusting inner joints, 8 gap adjusting outer joints, 9 upper joints, 10 adjustable gap inner rods, 11.40 steel balls, 12.40 ball seats, 13 telescopic joints, 14 pressurizing rods, 15 positioning joints, 16 locking blocks, 17 inner positioning joints, 18 bearing seats, 19 upper shear screws, 20 upper shear rings, 21 lower shear screws, 22 lower shear rings, 23 bearing boxes, 24 suspension shafts, 25 bearing rings, 26.19 steel balls, 27 bearing supports, 28 water dividing joints, 29 upper centralizers, 30.30 steel balls, 31.30 ball seats, 32 outer cylinders, 33 inner cylinders, 34 lower centralizers, 35 inner sliding sleeves, 36 outer sliding sleeves, 37 lower positioning joints, 38 lower locking blocks, 39 necking sleeve short sections, 40 shielding sleeves, 41 hoop type core claws, 42 necking sleeves, 43 petal type retractable core claws and 44 jaw locking blocks.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The first embodiment is as follows:
a jaw coring tool with double structures and a jaw differential adjustable gap consists of a differential assembly 100, a ball seat matched steel ball 200, a locking and hanging assembly 300, an outer cylinder assembly 400, an inner cylinder assembly 500, a shelterable double-core jaw structure assembly 600 and a coring bit 700; the differential assembly 100, the locking and hanging assembly 300, the outer cylinder assembly 400, the shelterable double-core claw structure assembly 600 and the coring bit 700 are sequentially connected from top to bottom through threads, and the upper part of the inner cylinder assembly 500 is connected with the locking and hanging assembly 300 through threads.
The shelterable double-core-claw structure assembly 600 consists of an inner sliding sleeve 35, a lower positioning joint 37, an outer sliding sleeve 36, a lower locking block 38, a sheltering sleeve 40, a neck sleeve short section 39, a clamp type core claw 41, a neck sleeve 42 and a petal type retractable core claw 43. The lower part of the inner cylinder assembly 500 is connected with the inner sliding sleeve 35 and the shielding sleeve 40 sequentially through threads. The outer sliding sleeve 36 is sequentially connected with the necking sleeve short section 39, the necking sleeve 42 and the petal type retractable core claw 43 through threads. The outer sliding sleeve 36 and the inner sliding sleeve 35 are fixedly connected through shear pins.
The differential assembly 100 consists of a jaw upper joint 1, a 50 ball seat 3, a jaw inner positioning joint 4, a shearing fixing screw 5, a jaw lower joint 6, a gap adjusting inner joint 7, a gap adjusting outer joint 8, an adjustable gap inner rod 10 and a jaw locking block 44; the upper part of the jaw upper joint 1 is connected with an upper drilling tool through a thread buckle, and the lower part of the jaw upper joint 1 is connected with the clearance adjusting outer joint 8 through a thread buckle. The clearance adjusting outer joint 8 is connected with the clearance adjusting inner joint 7 through a thread buckle. The jaw internal positioning joint 4 is connected with the jaw upper joint 1 through a shearing fixing screw 5. The gap adjusting inner joint 7 is connected with the gap adjustable inner rod 10 through a thread buckle.
The jaw upper joint 1 and the jaw lower joint 6 are mutually matched through splines, and whether the jaw upper joint and the jaw lower joint axially move or not is controlled by the jaw locking block 44; the spline shape is not limited to the rectangular shape listed in this example.
When the gap adjusting inner joint 7 rotates, the relative position of the inner rod 10 and the outer cylinder 32 is kept unchanged, and the gap adjusting inner joint 7 can move axially relative to the outer cylinder to play a role in adjusting the axial gap.
The locking and hanging assembly 300 is composed of a 40 ball seat 12, a pressurizing rod 14, a telescopic head 13, a positioning joint 15, a locking block 16, an inner positioning joint 17, a pressure bearing seat 18, an upper shearing ring 20, an upper shearing screw 19, a lower shearing ring 22, a lower shearing screw 21, a bearing box 23, a hanging shaft 24, bearing rings 25, 19 steel balls 26, a bearing support 27, a water diversion joint 28 and a 30 ball seat 31. The positioning joint 15 is connected with the clearance adjusting inner joint 7 through a thread buckle, the positioning joint 15 is connected with the inner positioning joint 17 through a locking block 16, the telescopic joint 13 is connected with the inner positioning joint 17 through a thread buckle, the inner positioning joint 17 is connected with the pressure bearing seat 18 through a thread buckle, the pressure bearing seat 18 is connected with the bearing box 23, the bearing box 23 is connected with the bearing support 27 through a thread buckle, the suspension shaft 24 is connected with the water distribution joint 28 through a thread buckle, and the water distribution joint 28 is connected with the water distribution joint 30 through a thread buckle. The bearing box 23, the bearing ring 25, the bearing support 27, the 19 steel ball 26 and the suspension shaft 24 are combined together through the geometrical shapes of the bearing box, and the tool is pressed tightly by gravity when in use. The upper shear ring 20 is connected to the pressure bearing block 18 by upper shear screws 19, and the lower shear ring 22 is connected to the pressure bearing block 18 by lower shear screws 21.
Ball seat mating balls 200 include 30 steel balls 30, 40 steel balls 11, 50 steel balls 2.
The diameter of the steel ball is equal to the diameter of the matched ball seat. The diameters of steel balls 30, 40, and 50, respectively, increase in order. 30. 40, 50 do not represent the steel ball diameter values, and the steel ball diameter is not limited to the values listed in the present example.
The outer cylinder assembly 400 consists of an upper joint 9, an upper centralizer 29, an outer cylinder 32 and a lower centralizer 34, and all the components are in threaded connection from top to bottom in sequence.
Before the 30 steel balls 30 are thrown in, the 30 steel balls 30 fall into the 30 ball seat 31, and the inner cylinder 33 is blocked, the mud can enter the inner cylinder 33 through the gap adjusting inner joint 7, the bearing seat 18, the pressurizing rod 14 and the inner hole of the locking and hanging assembly 300, and then returns to the annular space from the inner cylinder 33 to clean the bottom of the well and wash the inner cylinder 33.
After the 40 steel balls 11 are put in, the pressure rod 14 transmits pressure to the lower shear ring 22, and the lower shear screw 21 is sheared by the shear force. 40 steel balls 11, 40 ball seats 12, a pressurizing rod 14, an upper shearing ring 20 and a lower shearing ring 22 fall, the inner diameter of a positioning joint 15 is smaller than the outer diameter of the 40 ball seats 12, and mud forms a circulation path so as to achieve the purpose of pressure relief.
Through the differential assembly, the shielding sleeve 40 is lifted up to expose the clamp type core claw 41, and the process of pulling up and cutting the core is completed.
The outer sliding sleeve 36 is provided with two evenly distributed key slots which are matched with the lower locking block 38. The inner surface of the lower locking piece 38 is matched with the shielding sleeve 40, and the outer surface is matched with the lower positioning joint 37, and the outer diameter of the lower locking piece is larger than the inner diameter of the lower positioning joint 37.
When this embodiment cuts the heart, adopt simultaneously to push down, pull out two kinds of heart modes of cutting on: when the differential assembly 100 and the locking and hanging assembly 300 cut the core, the shearing pin is firstly pressed down, the petal-type retractable core claw 43 contracts, then the clamp-type core claw 41 is lifted up to expose, and the cutting core is pulled up.
When the cutting core is pulled up, the differential assembly 100 drives the inner sliding sleeve 35 and the outer sliding sleeve 36 to move up simultaneously, after the lower locking block 38 touches the lower positioning connector 37, the inner sliding sleeve 35 is continuously lifted up, and the shielding sleeve 40 is lifted out of the clamp type core claw 41.
50 steel balls 2 are thrown in, 50 steel balls 2 fall into 50 ball seats 3, pressure is transmitted to the 50 ball seats 3 through the 50 steel balls 2, the 50 ball seats 3 transmit the pressure to the positioning joints 4 in the jaw inserts, and the shearing fixing screws 5 can be sheared off under the action of shearing force. The gap-adjusting nipple 7 then falls, and the jaw lock piece 44 loses its resistance to falling. The jaw upper joint 1 and the jaw lower joint 6 lose the axial limitation and can move relatively in the axial direction
Example two:
a jaw core-taking tool with double structures and differential and adjustable gaps for a jaw comprises a differential assembly, a locking and hanging assembly, an outer cylinder assembly, an inner cylinder assembly, a shelterable double-core jaw structure assembly, a core-taking drill bit and a ball seat matched steel ball. The differential mechanism comprises an upper jaw joint, a lower jaw joint, an inner jaw positioning joint, a 50 ball seat, a shearing fixing screw, a jaw locking block and a gap adjusting device. The gap adjusting device comprises a gap adjusting outer joint, a gap adjusting inner joint and an adjustable gap inner rod. The upper part of the jaw upper joint is connected with the upper drilling tool through a thread buckle, and the lower part of the jaw upper joint is connected with the clearance adjusting outer joint through a thread buckle. The clearance adjusting outer joint is connected with the clearance adjusting inner joint through a thread buckle. The upper jaw joint and the lower jaw joint are mutually matched through splines and are prevented from moving axially by the jaw locking block. The internal positioning joint of the jaw is connected with the upper joint of the jaw through a shearing fixing screw. The clearance adjusting inner joint is connected with the clearance adjustable inner rod through a threaded buckle.
The locking and hanging assembly comprises a 40-ball seat, a pressurizing rod, a telescopic head, a positioning joint, a locking block, an inner positioning joint, a pressure bearing seat, an upper shearing ring, an upper shearing screw, a lower shearing ring, a lower shearing screw, a bearing box, a hanging shaft, a bearing ring, 19 steel balls, a bearing support, a water distribution joint and a 30-ball seat. The positioning joint is connected with the clearance adjustment inner joint through a thread buckle, the positioning joint is connected with the inner positioning joint through a locking block, the telescopic joint is connected with the inner positioning joint through a thread buckle, the inner positioning joint is connected with the bearing seat through a thread buckle, the bearing seat is connected with the bearing box, the bearing box is connected with the bearing support through a thread buckle, the suspension shaft is connected with the water distribution joint through a thread buckle, and the water distribution joint is connected with the 30 ball seat through a thread buckle. The bearing box, the bearing ring, the bearing support, the 19 steel ball and the suspension shaft are combined together through self geometric shapes, and the tool is pressed tightly by means of gravity when in use. The upper shearing ring is connected with the pressure bearing seat through an upper shearing screw, and the lower shearing ring is connected with the pressure bearing seat through a lower shearing screw.
The outer cylinder assembly comprises an upper connector, an upper centralizer, an outer cylinder, a lower centralizer, an outer cylinder lower matching connector 1 and an outer cylinder lower matching connector 2, and all the parts are sequentially in threaded connection from top to bottom.
The sheltering double-core claw structure assembly comprises an inner sliding sleeve, a lower positioning joint, an outer sliding sleeve, a lower locking block, a sheltering sleeve, a necking sleeve short section, a clamp type core claw, a necking sleeve and a petal type retractable core claw. The inner sliding sleeve is connected with the outer sliding sleeve through a shearing pin, the inner sliding sleeve is connected with the shielding sleeve through a threaded buckle, and the outer sliding sleeve is connected with the short section of the necking sleeve through a threaded buckle. The outer sliding sleeve is provided with two key slots which are uniformly distributed and matched with the lower locking block. The inner surface of the lower lock block is matched with the shielding sleeve, the outer surface of the lower lock block is matched with the shielding sleeve, and the outer diameter of the lower lock block is larger than the inner diameter of the lower positioning joint. The clamp core claw is positioned in an annular cavity formed by the necking sleeve and the shielding sleeve and can move axially. The petal type retractable core claw is connected with the necking sleeve through a thread buckle.
The ball seat matched steel balls comprise 30 steel balls, 40 steel balls and 50 steel balls.
The differential assembly, the locking and hanging assembly, the outer barrel assembly, the shelterable double-core-claw structure assembly and the coring bit are sequentially connected from top to bottom through threads, and the upper part of the inner barrel assembly is connected with the locking and hanging assembly through threads.
In the embodiment, steel balls are not thrown in before the drilling, and the pump is started to circulate the slurry after the drilling is finished to the bottom of the well. At the moment, the slurry enters the inner cylinder through the inner hole of the clearance adjusting inner joint, the pressure bearing seat, the pressurizing rod and the locking and hanging assembly and then returns to the annular space from the inner cylinder. Thus, the bottom of the well can be cleaned, and the inner barrel can be cleaned. After the bottom of the well is cleaned after the slurry is processed, 30 steel balls are thrown in, and the 30 steel balls fall into the 30 ball seats to block the slurry passage of the inner cylinder, and then core drilling is started.
When core drilling is carried out, the clamp type core claw is positioned between the shielding sleeve and the necking sleeve and does not directly contact the core.
When core cutting is needed after core drilling is finished, two core cutting modes of pressing and pulling up are adopted simultaneously. 40 steel balls are put into, 40 steel balls fall into the 40 ball seats, pressure is transmitted to the 40 ball seats through the 40 steel balls, the 40 ball seats transmit pressure to the pressure rod, the pressure rod transmits pressure to the upper shearing ring, the upper shearing screw bears shearing force, when the shearing force borne by the upper shearing screw exceeds shearing strength, the upper shearing screw is sheared, the 40 steel balls, the 40 ball seats, the pressure rod and the upper shearing ring fall, the pressure rod loses the blocking of the locking block, and the locking block slides out. The locking and hanging assembly and the inner cylinder are knocked down to force the petal-type retractable core claw to retract along the conical surface of the inner cavity of the coring bit, so that the core is cut off and wrapped, and the purpose of coring in a soft stratum is achieved.
Due to the plugging of the 40 steel balls, the pressure rod continuously transmits pressure to the lower shearing ring, the lower shearing screw is subjected to shearing force, and when the shearing force born by the lower shearing screw exceeds the shearing strength, the lower shearing screw is sheared off. 40 steel balls, 40 ball seats, a pressurizing rod, an upper shearing ring and a lower shearing ring fall, the inner diameter of the positioning joint is smaller than the outer diameter of the 40 ball seats, and mud forms a circulation passage to achieve the purpose of pressure relief.
After the release, drop into 50 steel balls, 50 steel balls fall into 50 ball seats, and pressure passes through 50 steel balls and transmits 50 ball seats, and 50 ball seats transmit pressure for the interior positioning joint of jaw, and shear set screw receives the shearing force, and when the shearing force that shear set screw bore exceeded shear strength, shear set screw was cut. The gap adjusting inner joint falls, and the jaw locking block loses the barrier and falls. The jaw upper joint and the jaw lower joint can move axially relative to each other. When the tool is lifted up, the jaw upper joint, the gap adjusting outer joint, the gap adjusting inner joint, the gap adjustable inner rod, the locking and hanging assembly, the inner cylinder assembly and the shielding sleeve move upwards to expose the clamp type core claw. The differential assembly drives the inner sliding sleeve and the outer sliding sleeve to move upwards simultaneously, the lower lock block touches the lower positioning joint, the inner sliding sleeve is continuously lifted, the blocking sleeve is lifted out of the clamp type core claw, the core is pulled out and cut, and the purpose of coring in hard strata is achieved
Example three:
referring to fig. 1, 2 and 5, the utility model discloses a double-structure claw coring tool with jaw differential adjustable gap, including differential assembly 100, locking and hang assembly 300, urceolus assembly 400, inner tube assembly 500, can shelter from double-core claw structure assembly 600, coring bit 700 and the supporting steel ball 200 of ball seat.
The differential assembly 100, the locking and hanging assembly 300, the outer cylinder assembly 400, the shelterable double-core claw structure assembly 600 and the coring bit 700 are sequentially connected from top to bottom through threads, and the upper part of the inner cylinder assembly 500 is connected with the locking and hanging assembly 300 through threads.
The differential assembly 100 comprises an upper jaw joint 1, a lower jaw joint 6, inner positioning jaws joints 4 and 50 ball seats 3, a shearing fixing screw 5, a jaw locking block 44, an inner gap adjusting joint 7, an outer gap adjusting joint 8 and an inner gap adjustable rod 10.
The upper part of the jaw upper joint 1 is connected with an upper drilling tool through a thread buckle, and the lower part of the jaw upper joint 1 is connected with the clearance adjusting outer joint 8 through a thread buckle. The clearance adjusting outer joint 8 is connected with the clearance adjusting inner joint 7 through a thread buckle. The jaw upper joint 1 and the jaw lower joint 6 are connected through splines and prevented from moving axially by the jaw locking block 44. The jaw internal positioning joint 4 is connected with the jaw upper joint 1 through a shearing fixing screw 5.
The gap adjusting inner joint 7 is connected with the gap adjustable inner rod 10 through a thread buckle. When the gap adjusting inner joint 7 rotates, the relative position of the inner rod 10 and the outer cylinder 32 is kept unchanged, and the gap adjusting inner joint 7 can move axially relative to the outer cylinder to play a role in axial gap adjustment.
Referring to fig. 3, the locking and hanging assembly 300 includes 40 ball seats 12, a pressure rod 14, a telescopic head 13, a positioning joint 15, a locking block 16, an inner positioning joint 17, a pressure bearing seat 18, an upper shear ring 20, an upper shear screw 19, a lower shear ring 22, a lower shear screw 21, a bearing box 23, a hanging shaft 24, bearing rings 25, 19 steel balls 26, a bearing support 27, and water diversion joints 28, 30 ball seats 31.
The positioning joint 15 is connected with the clearance adjusting inner joint 7 through a thread buckle, the positioning joint 15 is connected with the inner positioning joint 17 through a locking block 16, the pressure rod 14 extends into the inner positioning joint 17 to limit the radial position of the locking block 16, the telescopic joint 13 is connected with the inner positioning joint 17 through a thread buckle, the inner positioning joint 17 is connected with the pressure bearing seat 18 through a thread buckle, the pressure bearing seat 18 is connected with the bearing box 23 through a thread buckle, the bearing box 23 is connected with the bearing support 27 through a thread buckle, the suspension shaft 24 is connected with the water distribution joint 28 through a thread buckle, and the water distribution joint 28 is connected with the ball seat 31 of the water distribution joint 30 through a thread buckle. The bearing box 23, the bearing ring 25, the bearing support 27, the 19 steel ball 26 and the suspension shaft 24 are combined together through self geometric shapes, the tool is pressed tightly by gravity when in use, the bearing box 23 and the bearing support 27 axially limit the bearing ring 25 and the 19 steel ball 26, and the suspension shaft 24 is suspended on the bearing ring 25. An upper shearing ring 20 and a lower shearing ring 22 are arranged in the pressure bearing seat 1, the upper shearing ring 20 is connected with the pressure bearing seat 18 through an upper shearing screw 19, and the lower shearing ring 22 is connected with the pressure bearing seat 18 through a lower shearing screw 21.
Referring to fig. 3 and 4, the outer cylinder assembly 400 comprises an upper connector 9, an upper centralizer 29, an outer cylinder 32 and a lower centralizer 34, which are sequentially screwed from top to bottom.
Referring to fig. 4, the shelterable double-core-jaw structure assembly 600 includes an inner sliding sleeve 35, a lower positioning joint 37, an outer sliding sleeve 36, a lower locking block 38, a shelter sleeve 40, a necking sleeve short section 39, a hoop-type core jaw 41, a necking sleeve 42, and a petal-type retractable core jaw 43. The lower part of the inner cylinder assembly 500 is connected with the inner sliding sleeve 35 and the shielding sleeve 40 sequentially through threads. The outer sliding sleeve 36 is sequentially connected with the necking sleeve short section 39, the necking sleeve 42 and the petal type retractable core claw 43 through threads. The inner sliding sleeve 35 is connected with the outer sliding sleeve 36 through a shearing pin, the inner sliding sleeve 35 is in threaded connection with the shielding sleeve 40, and the outer sliding sleeve 36 is in threaded connection with the necking sleeve short section 39. The outer sliding sleeve 36 is provided with two evenly distributed key slots which are matched with the lower locking blocks 38. The inner surface of the lower locking piece 38 is matched with the shielding sleeve 40, and the outer surface is matched with the lower positioning joint 37, and the outer diameter of the lower locking piece is larger than the inner diameter of the lower positioning joint 37. The collar core gripper 41 is located within the annular cavity formed by the collar 42 and the shield 40 and is axially movable. The petal-type retractable core claw 43 is connected with the neck sleeve 42 through a thread buckle.
Referring to fig. 2 and 3, ball seat mating balls 200 include 30 steel balls 30, 40 steel balls 11, 50 steel balls 20. The diameter of the steel ball is equal to the diameter of the matched ball seat. The diameters of steel balls 30, 40, and 50, respectively, increase in order. 30. 40, 50 do not represent steel ball diameter values, and the steel ball diameter is not limited to the values listed in the present example.
Referring to fig. 1, a differential assembly 100, a locking and hanging assembly 300, an outer cylinder assembly 400, a shelterable double-core claw structure assembly 600, and a coring bit 700 are sequentially connected from top to bottom through threads, and the upper portion of the inner cylinder assembly 500 is connected with the locking and hanging assembly 300 through threads.
The above scheme further comprises:
before the drilling, steel balls are not thrown in, and the pump is started to circulate the slurry after the drilling is finished to the bottom of the well. At this time, the slurry enters the inner cylinder 33 through the gap adjusting nipple 7, the pressure bearing seat 18, the pressurizing rod 14 and the inner hole of the locking and suspending assembly 300, and then returns to the annular space from the inner cylinder 33. This allows both the bottom of the well and the inner barrel 33 to be cleaned. After the bottom of the well is cleaned after the slurry is processed, 30 steel balls 30 are thrown in, 30 steel balls 30 fall into 30 ball seats 31, the slurry passage of an inner cylinder 33 is blocked, and core drilling is started.
During core drilling, the clamp type core gripper 41 is positioned between the blocking sleeve 40 and the necking sleeve 42 and does not directly contact the core.
When core cutting is needed after core drilling is finished, two core cutting modes of pressing and pulling up are adopted simultaneously. 40 steel balls 11 are thrown, 40 steel balls 11 fall into 40 ball seats 12, pressure is transmitted to the 40 ball seats 12 through the 40 steel balls 11, the 40 ball seats 12 transmit pressure to the pressurizing rod 14, the pressurizing rod 14 transmits pressure to the upper shearing ring 20, the upper shearing screw 19 is subjected to shearing force, when the shearing force borne by the upper shearing screw 19 exceeds the shearing strength, the upper shearing screw 19 is sheared, the 40 steel balls 11, the 40 ball seats 12, the pressurizing rod 14 and the upper shearing ring 20 fall, the pressurizing rod 14 loses the blocking on the locking block 16, the locking block 16 slides out, and the positioning joint 15 is separated from the inner positioning joint 17. The locking and hanging assembly 300 and the inner cylinder 33 are hammered downwards to force the petal-type retractable core claw 43 to retract along the conical surface of the inner cavity of the coring bit 700, so that the core is cut off and wrapped, and the purpose of coring in a soft stratum is achieved.
Due to the plugging of the 40 steel balls 11, the pressure rod 14 continues to transmit pressure to the lower shear ring 22, the lower shear screw 21 is subjected to shear force, and when the shear force borne by the lower shear screw 21 exceeds the shear strength, the lower shear screw 21 is sheared. 40 steel balls 11, 40 ball seats 12, a pressurizing rod 14, an upper shearing ring 20 and a lower shearing ring 22 fall, the inner diameter of a positioning joint 15 is smaller than the outer diameter of the 40 ball seats 12, and mud forms a circulation path to achieve the purpose of pressure relief.
After the release, drop into 50 steel balls 2, 50 steel balls 2 fall into 50 ball seats 3, and pressure passes 50 ball seats 3 through 50 steel balls 2, and 50 ball seats 3 give the pressure transmission and fix joint 4 in the jaw, and shear set screw 5 receives the shearing force, and when the shearing force that shear set screw 5 bore exceeded shear strength, shear set screw 5 was cut. The gap-adjusting nipple 7 falls and the jaw lock piece 44 loses its resistance to falling. The jaw upper joint 1 and the jaw lower joint 6 can generate relative axial movement. The clamp type core claw 41 is positioned between the blocking sleeve 40 and the necking sleeve 42 during core drilling and does not directly contact with the core. When the core is cut and the core taking tool is lifted up, the jaw upper joint 1, the gap adjusting outer joint 8, the gap adjusting inner joint 7, the gap adjustable inner rod 10, the locking and hanging assembly 300, the inner cylinder assembly 500 and the blocking sleeve 40 move upwards to expose the clamp type core claw 41. The differential assembly 100 drives the inner sliding sleeve 35 and the outer sliding sleeve 36 to move upwards simultaneously, after the lower locking block 38 touches the lower positioning joint 37, the inner sliding sleeve 35 is continuously lifted, the shielding sleeve 40 is lifted out from the hoop type core claw 41, the upward pulling and core cutting are completed, and the purpose of hard formation core taking is achieved.
The utility model has the advantages that: repeated core cutting caused by deepwater operation is structurally avoided, and the core is prevented from being incapable of forming a column; under the condition that the lithology of the stratum is unknown, a universal coring tool suitable for soft to hard strata is provided; when multiple cylinders are used for continuous coring in deepwater operation, the reliability is higher.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a two structure claw coring tool in differential adjustable clearance of jaw which characterized in that: the core drilling machine comprises a differential assembly (100), a ball seat matched steel ball (200), a locking and hanging assembly (300), an outer cylinder assembly (400), an inner cylinder assembly (500), a shelterable double-core-claw structure assembly (600) and a coring bit (700); the differential assembly (100), the locking and hanging assembly (300), the outer cylinder assembly (400), the shelterable double-core claw structure assembly (600) and the coring bit (700) are sequentially connected from top to bottom, and the upper part of the inner cylinder assembly (500) is connected with the locking and hanging assembly (300).
2. The jaw coring tool of claim 1, wherein the jaw coring tool comprises: the shelterable double-core-jaw structure assembly (600) comprises an inner sliding sleeve (35), a lower positioning joint (37), an outer sliding sleeve (36), a lower locking block (38), a sheltering sleeve (40), a necking sleeve short section (39), a clamp type core jaw (41), a necking sleeve (42) and a petal type retractable core jaw (43); the lower part of the inner cylinder assembly (500) is sequentially connected with the inner sliding sleeve (35) and the shielding sleeve (40); the outer sliding sleeve (36) is sequentially connected with the necking sleeve short section (39), the necking sleeve (42) and the petal type retractable core claw (43); the outer sliding sleeve (36) and the inner sliding sleeve (35) are fixedly connected through shear pins.
3. The jaw coring tool of claim 2, wherein the jaw coring tool comprises: the differential assembly (100) comprises an upper jaw joint (1), a 50 ball seat (3), an inner jaw positioning joint (4), a shearing fixing screw (5), a lower jaw joint (6), a gap adjusting inner joint (7), a gap adjusting outer joint (8), an adjustable gap inner rod (10) and a jaw locking block (44); the upper part of the jaw upper connector (1) is connected with an upper drilling tool through a thread buckle, and the lower part of the jaw upper connector (1) is connected with the clearance adjusting outer connector (8) through a thread buckle; the gap adjusting outer joint (8) is connected with the gap adjusting inner joint (7) through a threaded buckle; the jaw inner positioning joint (4) is connected with the jaw upper joint (1) through a shearing fixing screw (5); the gap adjusting inner joint (7) is connected with the gap adjustable inner rod (10) through a threaded buckle.
4. The jaw differential gap adjustable dual configuration coring tool of claim 3, wherein: the jaw upper joint (1) and the jaw lower joint (6) are mutually matched through splines, a jaw locking block (44) is arranged between the jaw upper joint (1) and the jaw lower joint (6), and the jaw locking block (44) axially limits the jaw upper joint (1) and the jaw lower joint (6).
5. The jaw differential gap adjustable dual configuration coring tool of claim 4, wherein: when the gap adjusting inner joint (7) rotates, the relative position of the gap adjusting inner rod (10) and the outer cylinder (32) is kept unchanged, and the gap adjusting inner joint (7) can move along the axial direction relative to the outer cylinder.
6. The jaw differential gap adjustable dual configuration coring tool of claim 5, wherein: the locking and hanging assembly (300) comprises a 40 ball seat (12), a pressurizing rod (14), a telescopic head (13), a positioning joint (15), a locking block (16), a positioning joint (17), a pressure bearing seat (18), an upper shearing ring (20), an upper shearing screw (19), a lower shearing ring (22), a lower shearing screw (21), a bearing box (23), a hanging shaft (24), a bearing ring (25), a 19 steel ball (26), a bearing support (27), a water distribution joint (28) and a 30 ball seat (31);
the positioning joint (15) is connected with the clearance adjusting inner joint (7) through a threaded buckle, the positioning joint (15) is connected with the inner positioning joint (17) through a locking block (16), the telescopic joint (13) is connected with the inner positioning joint (17) through a threaded buckle, the inner positioning joint (17) is connected with the pressure bearing seat (18) through a threaded buckle, the pressure bearing seat (18) is connected with the bearing box (23), the bearing box (23) is connected with the bearing support (27) through a threaded buckle, the suspension shaft (24) is connected with the water distribution joint (28) through a threaded buckle, and the water distribution joint (28) is connected with the 30 ball seat (31) through a threaded buckle; the bearing box (23), the bearing ring (25), the bearing support (27), the 19 steel ball (26) and the suspension shaft (24) are combined together through self geometric shapes, and the tool is pressed tightly by means of gravity when in use; the upper shearing ring (20) is connected with the pressure bearing seat (18) through an upper shearing screw (19), and the lower shearing ring (22) is connected with the pressure bearing seat (18) through a lower shearing screw (21).
7. The jaw differential gap adjustable dual configuration coring tool of claim 6, wherein: the ball seat matched steel balls (200) comprise 30 steel balls (30), 40 steel balls (11) and 50 steel balls (2).
8. The jaw differential gap adjustable dual configuration coring tool of claim 7, wherein: the diameters of the steel balls are equal to the diameters of the matched ball seats, and the diameters of the 30 steel balls (30), the 40 steel balls (11) and the 50 steel balls (2) are sequentially increased.
9. The jaw differential gap adjustable dual configuration coring tool of claim 8, wherein: the outer cylinder assembly (400) comprises an upper joint (9), an upper centralizer (29), an outer cylinder (32) and a lower centralizer (34) which are sequentially connected from top to bottom.
10. The jaw differential gap adjustable dual structure coring tool of claim 2, wherein: the outer sliding sleeve (36) is provided with two key grooves which are uniformly distributed and matched with the lower locking block (38); the inner surface of the lower locking block (38) is matched with the shielding sleeve (40), the outer surface of the lower locking block is matched with the lower positioning joint (37), and the outer diameter of the lower locking block is larger than the inner diameter of the lower positioning joint (37).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123398141.8U CN217632346U (en) | 2021-12-30 | 2021-12-30 | Double-structure claw coring tool with jaw differential motion and adjustable gap |
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| CN202123398141.8U CN217632346U (en) | 2021-12-30 | 2021-12-30 | Double-structure claw coring tool with jaw differential motion and adjustable gap |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023125515A1 (en) * | 2021-12-30 | 2023-07-06 | 中国石油化工股份有限公司 | Coring tool, coring method, and application thereof |
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2021
- 2021-12-30 CN CN202123398141.8U patent/CN217632346U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023125515A1 (en) * | 2021-12-30 | 2023-07-06 | 中国石油化工股份有限公司 | Coring tool, coring method, and application thereof |
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Effective date of registration: 20230120 Address after: 100027 Chaoyangmen North Street, Chaoyang District, Chaoyang District, Beijing Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute Address before: 257017 no.827, Beiyi Road, Dongying District, Dongying City, Shandong Province Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute |
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