CN113815980B

CN113815980B - Sand supply device and sand supply method suitable for oil field fracturing operation

Info

Publication number: CN113815980B
Application number: CN202111245187.8A
Authority: CN
Inventors: 白成; 王剑波; 肖明喜; 涂可明; 张兴农; 蔡福明; 杨孝廉; 周忠全
Original assignee: Hubei Sz Petroleum Equipment Co ltd
Current assignee: Hubei Sz Petroleum Equipment Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2023-02-28
Anticipated expiration: 2041-10-26
Also published as: CN113815980A

Abstract

The sand supply device suitable for oilfield fracturing operation comprises a steel structure base, a sand separating tank, a bucket elevator, a feeder, a material separating auger and a feeding auger; the steel structure base is symmetrically provided with two groups of sand tanks; a bucket elevator is arranged between one ends of the two-component sand tank; a feeder is arranged on the steel structure base on one side of the lower end of the bucket elevator; the feeder is communicated with the bucket elevator; a material separating auger is arranged between the sand separating tanks on the other side of the upper end of the bucket elevator; the top end of the sand separating tank is provided with a feeding auger; the material distribution auger is communicated with the feeding auger; the feeding auger is communicated with the sand separating tank. This supply sand device suitable for oil field fracturing operation uses compact structure, design benefit can reach the volumetric purpose of increase through two storehouse formula structures, need not the plastic sealing strip again and can satisfy sealed requirement, solved that the dust that current sand jar exists is big, easily omit the material, store up the problem that the sand volume is less relatively, the assembly procedure is complicated, be particularly suitable for oil field fracturing operation's needs.

Description

Sand supply device and method suitable for oil field fracturing operation

Technical Field

The invention relates to a sand supply device suitable for oilfield fracturing operation, and belongs to the technical field of fracturing propping agent (quartz sand, ceramsite sand and the like) storage construction equipment for oilfield fracturing construction operation.

Background

The vertical sand tank is a common storage device in oil field construction, and has the functions of storing and conveying fracturing propping agents (quartz sand, ceramsite sand and the like) in oil field fracturing operation. After fracturing construction operation of one well site is completed, the well site needs to be transported to the next well site for use. The prior vertical sand tank, such as the sand feeding device of the vertical sand tank disclosed in the patent with the publication number of CN213801988U, has the following defects due to the structural limitations:

1) When the existing vertical sand tank adopts a belt conveyor as a conveying tool of a fracturing propping agent, the problem that the existing vertical sand tank is large in dust and easy to omit materials so as to cause the need of recovering the materials is solved.

2) The characteristic that needs to make a transition in complicated road conditions is stored to vertical sand jar during operation, has injectd the height that the machine was carried to the fill from this, and current vertical sand jar generally adopts single tank body structure, and under the effect of the quick-witted limit for height of bucket is carried to the fill of single tank body structure, the storage sand volume of current vertical sand jar has relatively less problem.

3) The vertical sand tank has the characteristic of needing to be transferred, and the existing sand tank is usually assembled on site after adopting an assembled structure; in order to ensure the sealing performance of the existing sand tank, the split bodies of the sand tank are sealed by sealing rings or sealing strips made of rubber materials, and the sealing rings or the sealing strips have the problems of easy aging and easy damage; so current sand tank all need change sealing washer or sealing strip when changeing at every turn, has the problem of assembling the procedure complicacy.

4) When the sand feeding operation of the existing sand tank is carried out, a loading vehicle is adopted to hoist the ton bag to the position above the bag breaker in a hoisting mode to complete the sand feeding operation; the problem that the loading vehicle needs to be additionally occupied so that the operation cost is high exists in the mode. In order to solve the problem of high operation cost caused by the fact that a loading vehicle is occupied during the sand feeding operation of the conventional sand tank, technical personnel in the field also try to adopt a mode that a suspension arm is directly arranged on a sand tank frame, so that the sand tank has the function of self-service sand feeding, and the purpose of saving the operation cost is further achieved; the sand tank disclosed in the invention patent application No. 201621079525X employs a self-contained boom; however, when the sand tank adopts a scheme with a suspension arm, the sand tank has the characteristic of convenient disassembly, so that the weight of the sand tank cannot be too high; and then the weight of the suspension arm chassis can not be too high, thereby causing that the suspension arm with the sand tank can only hoist a single ton bag at each time, and causing the problem that the sand tank has low autonomous sand feeding speed.

Therefore, there is a need to develop a new sand tank to solve the above problems existing in the conventional vertical sand tank.

Disclosure of Invention

The invention aims to: the utility model provides a compact structure, design benefit to solve that the dust that current sand jar had is big, easily omit the material, store up sand volume less relatively, assemble a confession sand device that procedure is complicated problem that the operation used suitable for oil field fracturing.

The technical scheme of the invention is as follows:

a sand supply device suitable for oilfield fracturing operation comprises a steel structure base, a sand separating tank, a bucket elevator, a feeder, a material separating auger and a feeding auger; the method is characterized in that: the steel structure base is symmetrically provided with two groups of sand tanks; a bucket elevator is arranged between one ends of the two component sand tanks; a feeder is arranged on the steel structure base on one side of the lower end of the bucket elevator; the feeder is communicated with the bucket elevator; a material separating auger is arranged between the sand separating tanks on the other side of the upper end of the bucket elevator; the top end of the sand separating tank is provided with a feeding auger; the material distribution auger is communicated with the feeding auger; the feeding auger is communicated with the sand separating tank.

A sand supply device suitable for oil field fracturing operation comprises a steel structure base, a sand separating tank, a bucket elevator, a feeder and a sand feeding auger; the method is characterized in that: two-component sand tanks are symmetrically arranged on the steel structure base; a bucket elevator is arranged between one ends of the two component sand tanks; a feeder is arranged on the steel structure base on one side of the lower end of the bucket elevator; the feeder is communicated with the bucket elevator; a sand feeding auger is arranged between the sand separating tanks on the other side of the upper end of the bucket elevator through a dividing disc; the outlet of the bucket elevator is communicated with the sand feeding auger through an adapter; two groups of dustproof joints are symmetrically arranged at the upper end of the sand separating tank; the dustproof joint is intermittently communicated with the sand feeding auger.

An automatic suspension arm is arranged on the steel structure base at one side of the feeder; the steel structure base on one side of the automatic suspension arm is connected with a counterweight seat.

The middle part of the upper end of the sand feeding auger is provided with a feeding sleeve; a plurality of sealing rings are arranged on the circumferential surface of the upper end of the feeding sleeve; the feeding sleeve of the sand feeding auger is communicated with the outlet of the bucket elevator through the adapter; two sides of the lower part of the sand feeding auger are respectively provided with a discharging sleeve; the lower end face of the discharging sleeve is of an inclined plane structure.

The adapter comprises a left half sleeve, a right half sleeve and a locking bolt; flange half rings are arranged at the upper ends of the left half sleeve and the right half sleeve; the lower ends of the left half sleeve and the right half sleeve are provided with sealing half rings; one ends of the sealing semi-rings are hinged with each other through rotating pins; the other ends of the sealing semi-rings are mutually connected through a connecting lug and a locking bolt; the left half sleeve and the right half sleeve are buckled to form a cylindrical structure, and flange semi-rings at the upper ends of the left half sleeve and the right half sleeve form a flange whole; a sealing whole ring is formed between the sealing half rings at the lower ends of the left half sleeve and the right half sleeve; the inner wall of the whole sealing ring is provided with sealing ring grooves at intervals; the sealing ring groove is movably clamped and connected with the sealing ring on the feeding sleeve.

The dustproof joint comprises a bearing ring, a flexible sleeve, a guide cylinder, a collapsing rod and a buffer spring; the upper end of the inlet of the sand separating tank is obliquely provided with a bearing ring; a plurality of collapsing rods are fixedly arranged at the lower end of the bearing ring; a guide cylinder is fixedly arranged on the sand separating tank below the collapsing rod; the collapsing rod is inserted into and connected with the guide cylinder; a buffer spring is arranged in the guide cylinder below the collapsing rod; the inner side edge opening of the bearing ring is hermetically connected with a flexible sleeve; the lower end of the flexible sleeve is connected with the inlet of the sand separating tank in a sealing way.

The feeder comprises a feeding sand hopper, a bag breaking cone, a bag breaking cutter and a feeding rack; a feeding rack is arranged on the steel structure base; a feeding sand hopper is arranged on the feeding rack; the lower end of the feeding sand hopper is communicated with an inlet of the bucket elevator; two groups of bag breaking cones are arranged in the middle of the feeding sand hopper; the lower end of the bag breaking cone is fixedly connected with the interior of the feeding sand hopper through a plurality of uniformly distributed support rods; the outer side of the supporting rod is provided with a bag breaking knife.

One side of the lower end of the bucket elevator is hinged with the steel structure base through a hinge lug; the top end of the bucket elevator is provided with a hoisting ring.

The sand separating tank comprises a bottom layer frame, a middle frame, a lower tank body, a middle tank body and an upper tank body; a bottom layer frame is fixedly arranged on the steel structure base; two groups of lower tank bodies are symmetrically arranged in the bottom layer frame; a plurality of supporting pins are uniformly distributed at the top end of the bottom layer frame; the bottom layer frame is provided with a middle frame through a supporting pin; a middle tank body is fixedly arranged in the middle frame; the lower end of the middle tank body is in a closing-up structure; the lower end of the middle tank body is hermetically connected with the lower tank body through a sealing structure; a plurality of supporting pins are uniformly distributed at the top of the middle frame; the top of the middle frame is provided with an upper tank body through a supporting pin; the upper tank body and the middle tank body are mutually connected in a sealing way through a sealing structure; the middle parts of the middle tank body and the upper tank body are respectively provided with a partition plate; the partition plate divides the interior of the middle tank body and the interior of the upper tank body into two independent material storage bins; the lower end of the storage bin is communicated with the lower tank body; the middle tank body is fixedly connected with the lower tank body and the upper tank body through locking pieces respectively.

The supporting pin is in a step-shaped structure; a certain gap is reserved between the upper tank body and the middle tank body under the action of the supporting pin; a certain gap is reserved between the middle tank body and the lower tank body; the sealing structure comprises a sealing ring and a sealing strip; the top of the middle tank body is welded with a sealing ring; sealing strips are welded on the periphery of the lower part of the upper tank body; after the upper tank body and the middle tank body are assembled, a labyrinth structure is formed between the sealing ring and the sealing strip; sealing strips are welded on the periphery of the bottom of the middle tank body; the upper end of the lower tank body is welded with a sealing ring; after the lower tank body and the middle tank body are assembled, a labyrinth structure is formed between the sealing ring and the sealing strip.

The locking piece comprises a hinge seat, a rotary screw, a locking nut, a supporting seat and a supporting turning plate; a rotary screw rod is movably hinged on the hinge seat; a supporting seat is arranged above the hinged seat; the upper end of the supporting seat is hinged with a supporting turning plate; the support turning plate is provided with an assembling hole; the rotary screw penetrates through the assembly hole and is in threaded connection with a locking nut; a plurality of hinged seats are welded on the lower tank body; a plurality of supporting seats are correspondingly welded at the lower end of the middle frame; the welding of the upper end of middle frame have a plurality of articulated seats, go up the welding that the lower extreme of jar body corresponds and have a plurality of supporting seats.

The lower tank body is in a conical structure; the lower end of the lower tank body is provided with a discharge chute through a control gate valve.

The upper end of the middle part of the material distribution auger is provided with a material inlet, and both sides of the lower part of the material distribution auger are respectively provided with a material outlet; a feed inlet is formed in the upper end of the feeding auger, and discharge outlets are formed in two sides of the lower part of the feeding auger respectively; the discharge port of the feeding auger is communicated with a corresponding material storage bin on the sand separating tank; the feed inlet of the feed auger is communicated with the discharge outlet of the corresponding material distribution auger; the feed inlet of the material distributing auger is communicated with the discharge outlet on the bucket elevator.

The invention has the advantages that:

this supply sand device suitable for oil field fracturing operation uses compact structure, design benefit can reach the volumetric purpose of increase through two storehouse formula structures, need not the plastic sealing strip again and can satisfy sealed requirement, solved that the dust that current sand jar exists is big, easily omit the material, store up the problem that the sand volume is less relatively, the assembly procedure is complicated, be particularly suitable for oil field fracturing operation's needs.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic diagram of the right side view structure of the present invention;

FIG. 4 is a schematic illustration of the configuration of the bucket elevator and feeder of the present invention;

FIG. 5 is a schematic front view of the feeder of the present invention;

FIG. 6 is a schematic view of the right side of the feeder of the present invention;

FIG. 7 is a schematic top view of the feeder of the present invention;

FIG. 8 is a schematic structural view of a sand separating tank according to the present invention;

FIG. 9 is a schematic front view of the lower can body of the present invention;

FIG. 10 is a left side view of the structure of FIG. 9;

FIG. 11 is a schematic structural view of an intermediate tank of the present invention;

FIG. 12 is a left side view of the structure of FIG. 11;

FIG. 13 is a schematic structural view of the upper tank 32 of the present invention;

FIG. 14 is a left side view of the structure of FIG. 13;

FIG. 15 is a schematic top view of the structure of FIG. 13;

FIG. 16 is an enlarged view of the structure at A in FIG. 1;

FIG. 17 is a schematic view of the structure in the direction B-B in FIG. 16;

FIG. 18 is a schematic view of the structure of FIG. 16 in the direction C-C;

FIG. 19 is a schematic view of the structure of FIG. 16 taken along line D-D;

FIG. 20 is a schematic structural view of a material distribution auger and a feed auger of the present invention;

FIG. 21 is a schematic structural view of the material distributing auger of the present invention;

FIG. 22 is a schematic view of the feed auger of the present invention;

FIG. 23 is a schematic view of the structure of the retaining member of the present invention;

FIG. 24 is a schematic view of a modified structure of the present invention;

FIG. 25 is a schematic structural view of the sand feeding auger of the present invention;

FIG. 26 is an enlarged view of the structure of FIG. 25 at D;

FIG. 27 is a schematic view of an adapter according to the present invention;

FIG. 28 is a schematic view of the structure of FIG. 26 in the direction E-E;

FIG. 29 is a schematic view of the unassembled configuration of FIG. 28;

FIG. 30 is a schematic view of the construction of the dust fitting of the present invention;

fig. 31 is a schematic structural view of an automatic boom and counterweight housing of the present invention.

In the figure: 1. a steel structure base; 2. separating sand tanks; 3. a bucket elevator; 4. a feeder; 5. a material separating auger; 6. feeding the auger; 7. a feeding frame; 8. a sand hopper for feeding; 9. breaking a bag cone; 10. a support bar; 11. a bag breaking knife; 12. a hinged lug; 13. hoisting a ring; 14. a bottom layer frame; 15. a lower tank body; 16. a support pin; 17. a middle frame; 18. an intermediate tank body; 19. a partition plate; 20. a locking member; 21. a seal ring; 22. a sealing strip; 23. a hinged seat; 24. rotating the screw; 25. locking the nut; 26. a supporting base; 27. supporting the turning plate; 28. controlling a gate valve; 29. a discharge chute; 30. a feed inlet; 31. a discharge port; 32. feeding the tank body; 33. a sand feeding auger; 34. an index plate; 35. a flexible sleeve; 36. an adapter; 37. a dust joint; 38. automatic suspension arm; 39. a counterweight seat; 40. a feeding sleeve; 41. a seal ring; 42. a discharging sleeve; 43. a left half sleeve; 44. a right half sleeve; 45. locking the bolt; 46. a flange semi-ring; 47. connecting the support lugs; 48. a buffer spring; 49. sealing the ring groove; 50. a load ring; 51. collapsing the rods; 52. a guide cylinder; 53. sealing the half ring; 54. and (7) rotating the pin.

Detailed Description

The sand supply device suitable for the oilfield fracturing operation comprises a steel structure base 1, a sand separating tank 2, a bucket elevator 3, a feeder 4, a material separating auger 5 and a feeding auger 6 (see the attached figures 1 and 2 in the specification).

The steel constructs base 1 and is split type structure, through the mutual fixed connection of pin during the assembly, the aim at who so sets up: so that can conveniently transport after becoming each monomer with steel structure base 1 split in the transportation.

Two-component sand tanks 2 are symmetrically arranged on a steel base 1 (see the attached figures 1 and 2 of the specification). The sand separating tank 2 comprises a bottom layer frame 14, a middle frame 17, a lower tank body 15, a middle tank body 18 and an upper tank body 32 (see the attached figure 8 in the specification).

A bottom frame 14 is fixedly arranged on the steel structure base 1 in a mode of fixing through a pressing plate; two groups of lower tank bodies 15 are symmetrically arranged in the bottom layer frame 14 (see the attached figures 9 and 10 of the specification). The lower tank body 15 is in a conical structure; the lower end of the lower tank body 15 is provided with a discharge chute 29 in an inclined shape through a control gate valve 28 (see the attached figure 10 in the specification). During operation, fracturing propping agents (quartz sand, ceramsite sand and the like) in the sand separating tank 2 are discharged out through the discharge chute 29 under the control of the control gate valve 28.

A plurality of supporting pins 16 are uniformly distributed at the top end of the bottom layer frame 14 (refer to the description and the attached figure 9); guide plates are obliquely arranged on both sides of the support pin 16; the bottom end of the middle frame 17 is provided with a plug hole opposite to the support pin 16 on the bottom layer frame 14; during assembly, the middle frame 17 is installed on the upper end of the bottom frame 14 by means of lifting and under the guiding of the guide plates and the inserting action of the support pins 16.

A middle tank body 18 is fixedly arranged in the middle frame 17; the lower end of the middle tank body 18 is in a closing-up structure; the lower end of the intermediate tank 18 is hermetically connected to the lower tank 15 by a sealing structure.

A plurality of supporting pins 16 are uniformly distributed on the top of the middle frame 17; guide plates are obliquely arranged on both sides of the support pin 16; the upper tank 32 is mounted on the top of the intermediate frame 17 via support pins 16. The upper tank 32 and the intermediate tank 18 are hermetically connected with each other through a sealing structure.

The support pins 16 are in a stepped configuration (not shown in the drawings); a certain gap is reserved between the upper tank body 32 and the middle tank body 18 under the action of the supporting pins 16; a gap is formed between the intermediate tank 18 and the lower tank 15 (see the attached figures 1, 16 and 19 in the specification).

The sealing structure comprises a sealing ring 21 and a sealing strip 22 (see the description of figures 16, 17 and 18); the top of the middle tank body 18 is welded with a sealing ring 21; the periphery of the lower part of the upper tank body 32 is welded with a sealing strip 22; after the upper tank 32 and the middle tank 18 are assembled, a labyrinth structure is formed between the sealing ring 21 and the sealing strip 22 (see the attached figures 17, 18 and 19 in the specification).

The periphery of the bottom of the middle tank body 18 is welded with a sealing strip 22; the upper end of the lower tank body 15 is welded with a sealing ring 21; after the lower tank 15 and the middle tank 18 are assembled, a labyrinth structure (not shown in the attached drawings) is formed between the sealing ring 21 and the sealing strip 22.

The purpose of so setting the seal structure is to: after the sealing structure forms a labyrinth structure, because the fracturing propping agent (quartz sand, ceramsite sand and the like) has the characteristic of weak fluidity, when the fracturing propping agent flows into the sealing structure, the fracturing propping agent is filled in the inner space of the sealing structure, so that the automatic sealing effect is achieved; the sealing structure of this application can not use the sealing washer of rubber material can reach sealed purpose to all need change sealing washer or sealing strip when having solved current sand jar and having changeed every turn, the complicated problem of assembly procedure that has.

The middle parts of the middle tank 18 and the upper tank 32 are respectively provided with a partition plate 19 (see the attached figures 11 and 13 of the specification). The partition plate 19 divides the interior of the middle tank body 18 and the interior of the upper tank body 32 into two independent material storage bins; the lower extreme and the lower jar of body 15 intercommunication of storage feed bin.

The intermediate tank 18 is fixedly connected with the lower tank 15 and the upper tank 32 respectively through the locking member 20 (see the attached figure 8 in the specification). The locking member 20 comprises a hinged seat 23, a rotary screw 24, a locking nut 25, a support seat 26 and a support flap 27 (see figure 23 of the description).

A rotary screw 24 is movably hinged on the hinge seat 23; a supporting seat 26 is arranged above the hinged seat 23; the upper end of the supporting seat 26 is hinged with a supporting turnover plate 27; the support turning plate 27 is provided with an assembling hole; the rotating screw 24 is threaded with a lock nut 25 (see the description and the attached figure 23) after passing through the assembly hole.

A plurality of hinge seats 23 are welded on the lower tank body 15; a plurality of supporting seats 26 are correspondingly welded at the lower end of the middle frame 17; a plurality of hinged seats 23 are welded on the upper end of the middle frame 17, and a plurality of supporting seats 26 (not shown in the attached drawings) are correspondingly welded on the lower end of the upper tank body 32. The purpose of so positioning retaining member 20 is: so that the hinge 23 and the support 26 can be separated independently of each other to facilitate quick and easy connection and fixation between the middle frame 17 and the lower and

upper vessels

15 and 32 by means of the locking members 20.

A bucket elevator 3 is arranged between one ends of the two-component sand tanks 2 (see the attached figures 1 and 2 of the specification); one side of the lower end of the bucket elevator 3 is hinged with the steel structure base 1 through a hinge support lug 12; the top end of the bucket elevator 3 is provided with a hoisting ring 13 (see the description and the attached figure 4). The purpose of thus setting the bucket elevator 3 is: before assembly, the bucket elevator 3 is conveyed to a specified position in a sleeping posture, and when the bucket elevator needs to be assembled, the lower end of the bucket elevator 3 is hinged with the steel-structure base 1 through the hinged support lug 12; then hoisting the steel plate in place by a crane under the coordination of the hoisting ring 13; and after the bucket elevator 3 is hoisted in place, the bucket elevator is fixed with the sand separating tanks 2 on two sides.

A feeder 4 (see the attached figure 4 in the specification) is arranged on the steel structure base 1 on one side of the lower end of the bucket elevator 3; the feeder 4 comprises a feeding sand hopper 8, a bag breaking cone 9, a bag breaking knife 11 and a feeding frame 7 (see the attached figures 5, 6 and 7 in the specification). The steel structure base 1 is provided with a feeding rack 7; a feeding sand hopper 8 is arranged on the feeding frame 7; the lower end of the feeding sand hopper 8 is communicated with the inlet of the bucket elevator 3 (see the attached figure 4 in the specification); when the fracturing sand bucket is in work, fracturing propping agents (quartz sand, ceramsite sand and the like) entering the feeding sand bucket 8 enter the bucket elevator 3 under the action of self weight.

Two groups of bag breaking cones 9 are arranged in the middle of the feeding sand hopper 8 (see the attached figure 6 in the specification); the lower end of the bag breaking cone 9 is fixedly connected with the inside of the feeding sand hopper 8 through a plurality of uniformly distributed support rods 10; the outside of the support rod 10 is provided with a bag breaking knife 11 (see the attached figure 6 in the specification). The purpose of the bag breaking cone 9 is as follows: so that during operation, broken bag awl 9 punctures the back with the bottom of being equipped with fracturing propping agent ton bag, and broken bag sword 11 can be further with the bottom tear of ton bag to reach increase ton bag bottom leak, make the inside fracturing propping agent of ton bag can fall into the inside purpose of feeding sand hopper 8 fast.

A material separating auger 5 (refer to the attached figures 2 and 20 of the specification) is arranged between the sand separating tanks 2 on the other side of the upper end of the bucket elevator 3. The top end of the sand separating tank 2 is provided with a feeding auger 6 (see the attached figure 2 in the specification); the upper end of the middle part of the material distributing auger 5 is provided with a material inlet 30, and both sides of the lower part of the material distributing auger 5 are respectively provided with a material outlet 31 (refer to the attached figure 21 in the specification); the upper end of the feeding auger 6 is provided with a feeding port 30, and both sides of the lower part of the feeding auger 6 are respectively provided with a discharging port 31 (see the attached figure 2 in the specification).

The feed inlet 30 of the material separating auger 5 is communicated with the discharge outlet 31 of the bucket elevator 3. The discharge port 31 of the material distributing auger 5 is communicated with the feed port 30 of the feed auger 6; the discharge port 31 of the feeding auger 6 is communicated with the corresponding material storage bin on the sand separating tank 2. So between bucket elevator 3 and the branch material auger 5, accessible sealing connection's mode is assembled between feeding auger 6 and the branch sand jar 2, so can reach when vertical sand jar adopts band conveyer as the transport means of fracturing propping agent, it has the dust big and easily leaves the problem that the material leads to needing to retrieve the material easily.

When the fracturing proppant separating device works, the material separating auger 5 can convey the fracturing proppant entering the material separating auger 5 to one feeding auger 6 or the other feeding auger 6 in a forward and reverse rotating mode. When the feeding auger 6 works, the fracturing propping agent entering the feeding auger can be conveyed to one storage bin or the other storage bin in a positive and negative rotation mode.

When the sand supply device suitable for oilfield fracturing operation works, the material distribution auger 5, the feeding auger 6 and the bucket elevator 3 are sequentially started; two sets of ton bags containing fracturing proppant are then loaded using a loader and transported over the bag breaker cone 9. Then the loader drives the ton bag to move downwards, so that after the bag breaking cone 9 breaks the ton bag, the fracturing propping agent in the ton bag falls into the feeding sand hopper 8 under the action of gravity, and finally is conveyed into the distributing auger 5 through the bucket elevator 3.

When entering the inside of branch material auger 5, it can be through the form of just reversing with transporting fracturing proppant to a series of feeding auger 6 or in another series of feeding auger 6. After entering the feeding auger 6, the fracturing propping agent entering the feeding auger is conveyed to one storage bin or the other storage bin in a positive and negative rotation mode. After the fracturing propping agent enters the material storage bin, people can open the control gate valve 28 to discharge the fracturing propping agent through the discharge chute 29 to achieve the purpose of feeding.

In the process, after the fracturing propping agent in the ton bag completely enters the feeding sand hopper 8, the ton bag is manually taken down, and the loader loads the ton bag again, so that the sand supply device applicable to oilfield fracturing operation can enter the next working cycle.

The deformation structure of the sand supply device suitable for the oil field fracturing operation comprises a steel base 1, a sand separating tank 2, a bucket elevator 3, a feeder 4 and a sand feeding auger 33 (see the attached figure 24 in the specification).

Two-component sand tanks 2 are symmetrically arranged on the steel structure base 1; a bucket elevator 3 is arranged between one ends of the two-component sand tank 2; a feeder 4 is arranged on the steel structure base 1 on one side of the lower end of the bucket elevator 3; the feeder 4 is communicated with the bucket elevator 3 (see the attached figure 31 of the specification). Fracturing propping agents (quartz sand, ceramsite sand and the like) entering the feeder 4 during operation enter the bucket elevator 3 under the action of self weight.

A sand feeding auger 33 (refer to the attached figure 24 in the specification) is arranged between the sand separating tanks 2 at the other side of the upper end of the bucket elevator 3 through a dividing disc 34. The dividing disc 34 can drive the sand feeding auger 33 to rotate freely around the middle part of the sand feeding auger when in operation (see the attached figure 25 in the specification).

The middle part of the upper end of the sand feeding auger 33 is provided with a feeding sleeve 40; the feeding sleeve 40 is provided with a plurality of sealing rings 41 (see the description and the attached figures 25 and 26) on the circumferential surface of the upper end. The feeding sleeve 40 of the sand feeding auger 33 is communicated with the outlet of the bucket elevator 3 through the adapter 36 (see the attached figure 25 in the specification).

The adapter 36 includes a left sleeve half 43, a right sleeve half 44, and a locking bolt 45 (see fig. 27 and 28 of the specification). Flange half rings 46 are arranged at the upper ends of the left half sleeve 43 and the right half sleeve 44; the lower ends of the left half sleeve 43 and the right half sleeve 44 are provided with sealing half rings 53; one ends of the sealing half rings 53 are hinged with each other through rotating pins 54; the other ends of the packing half rings 53 are connected to each other by the engaging lugs 47 and the locking bolts 45. When the locking bolt 45 is loosened during operation, the left half sleeve 43 and the right half sleeve 44 can be kept in a mutually hinged state through the rotating pin 54, so that after the left half sleeve 43 and the right half sleeve 44 are separated from each other during assembly, the sealing half ring 53 at the lower end of the sealing half sleeve is aligned with the feeding sleeve 40 and is buckled, and the sealing half ring 53 is kept movably connected with the feeding sleeve 40 through the locking bolt 45.

The left half sleeve 43 and the right half sleeve 44 are buckled to form a cylindrical structure, and flange integration is formed between flange half rings at the upper ends of the left half sleeve 43 and the right half sleeve 44; during assembly, the adapter 36 can be fixedly and hermetically connected with the outlet of the bucket elevator 3 through the whole flange.

A sealing whole ring is formed between the sealing half rings 53 at the lower ends of the left half sleeve 43 and the right half sleeve 44; the inner wall of the sealing whole ring is provided with sealing ring grooves 49 at intervals; the sealing ring groove 49 is movably connected with the sealing ring 41 on the feeding sleeve 40 in a clamping way (see the attached figure 26 in the specification). The purpose of so setting is: so that the adapter 36 can keep movable connection with the sealing ring 41 on the feeding sleeve 40 under the action of the sealing whole ring; but also maintain a sealed connection.

Two sides of the lower part of the sand feeding auger 33 are respectively provided with a discharging sleeve 42; the lower end face of the discharging sleeve 42 is in a bevel structure (see the attached figure 25 in the specification). When the sand feeding auger 33 rotates forwards, the material can be pushed to one discharging sleeve 42; when the sand feeding auger 33 rotates reversely, the material can be pushed to the other discharging sleeve 42.

Two sets of dust joints 37 are symmetrically arranged at the upper end of the sand separating tank 2 (see the attached figure 24 in the specification). The dustproof joint 37 is communicated with a corresponding material storage bin on the sand separating tank 2; during operation, fracturing propping agents (quartz sand, ceramsite sand and the like) entering the dustproof joint 37 enter the corresponding storage bins under the action of self gravity.

The dust joint 37 comprises a bearing ring 50, a flexible sleeve 35, a guide cylinder 52, a crush rod 51 and a buffer spring 48 (see the description of the figure 30).

The upper end of the inlet of the sand separating tank 2 is obliquely provided with a bearing ring 50; a plurality of collapse rods 51 are fixedly arranged at the lower end of the bearing ring 50; a guide cylinder 52 is fixedly arranged on the sand separating tank 2 below the collapsing rod 51; the collapsing rod 51 and the guide cylinder 52 are inserted and connected; the inside of the guide cylinder below the collapsing rod 51 is provided with a buffer spring 48 (see the description and the attached fig. 30).

The inner edge of the bearing ring 50 is connected with a flexible sleeve 35 (see the figure 30 of the attached figure of the specification); the lower end of the flexible sleeve 35 is hermetically connected with the inlet of the sand separating tank 2. The flexible sleeve 35 may be made of cloth having a dust-proof function; fracturing proppants (quartz sand, ceramsite sand, etc.) that enter the interior of the carrier ring 50 during operation can enter the interior of the sand separation tank 2 along the flexible sleeve 35 under the force of gravity.

The dust-proof joint 37 is provided so as to: when the sand feeding auger 33 rotates to be in contact with the bearing ring 50, the discharging sleeve 42 on the sand feeding auger 33 can extrude the bearing ring 50 in an inclined state through the inclined plane of the discharging sleeve in the rotating process; so that the bearing ring 50 can move downwards after being stressed and overcoming the elastic force of the buffer spring 48 under the guidance of the collapse rod 51; when the sand feeding auger 33 runs to a designated position, the bearing ring 50 is in contact sealing connection with the discharging sleeve 42 of the sand feeding auger 33 under the action of the elastic force of the buffer spring 48; in such a working process, fracturing propping agents (quartz sand, ceramsite sand and the like) output by the discharging sleeve 42 enter the sand separating tank 2 through the dustproof joint 37. In the process, the dustproof joint 37 is in sealing connection with the discharging sleeve 42 of the sand feeding auger 33, so that the problem of large dust when the sand feeding auger 33 directly inputs fracturing propping agents (quartz sand, ceramsite sand and the like) into the sand separating tank 2 can be solved.

An automatic suspension arm 38 is arranged on the steel structure base 1 at one side of the feeder 4; a counterweight seat 39 is connected to the steel base 1 on one side of the automatic boom 38 (see the description and the attached drawing 31). The purpose of thus arranging the weight seat 39 is: so that during operation, the trailer with ton bags can stop at the counterweight seat 39, so that the weight of the trailer can be utilized to achieve the effect of counterweight the bottom end of the automatic suspension arm 38 under the cooperation of the counterweight seat 39, and the stability of the bottom end of the automatic suspension arm 38 can be ensured, thereby achieving the purpose of lifting two ton bags once and improving the sanding efficiency.

When the deformation structure of the sand supply device suitable for oilfield fracturing operation works, a trailer provided with a ton bag is firstly stopped on the counterweight seat 39; then the sand feeding auger 33 and the bucket elevator 3 are started. Two sets of ton bags containing fracturing proppant are then carried and transported over the bag breaker cone 9 using the automatic boom 38. And the rear loader drives the ton bag to move downwards, so that after the bag breaking cone 9 breaks the ton bag, the fracturing propping agent in the ton bag falls into the feeding sand hopper 8 under the action of gravity and finally is conveyed into the upper sand auger 33 through the hopper lifter 3.

When the fracturing propping agent enters the inner part of the sand feeding auger 33, the fracturing propping agent can be conveyed to a group of dust connectors 37 or another group of dust connectors 37 connected with the fracturing propping agent in a positive and negative rotation mode; and is inputted to the inside of the corresponding sand separating tank 2 through the dust-proof joint 37. After a period of time, when a certain amount of fracturing propping agent is filled in the corresponding sand separating tank 2, the bucket elevator 3 stops acting; the dividing disc 34 drives the sand feeding auger 33 to rotate for a certain angle, so that a discharge sleeve 42 of the sand feeding auger 33 is communicated with the other two groups of dustproof connectors 37; and then the bucket elevator 3 and the sand feeding auger 33 act to convey the fracturing propping agent to the corresponding sand separating tank 2 for storage.

After fracturing propping agent is stored in the sand separating tank 2, people can discharge the fracturing propping agent through the discharge chute 29 by opening the control gate valve 28 to achieve the purpose of feeding.

In the process, after the fracturing propping agent in the ton bag completely enters the feeding sand hopper 8 and the ton bag is manually taken down, the automatic suspension arm 38 carries the ton bag again, and the sand supply device suitable for oil field fracturing operation can enter the next working cycle.

This supply sand device suitable for oil field fracturing operation uses compact structure, design benefit can reach the purpose of increase volume through two storehouse formula structures, need not plastic sealing strip 22 again and can satisfy sealed requirement, solved that the dust that current sand jar had is big, easily omit the material, store up the problem that the sand volume is less relatively, the assembly procedure is complicated, the needs of especially adapted oil field fracturing operation.

Claims

1. A sand supply device suitable for oilfield fracturing operation comprises a steel structure base (1), a sand separating tank (2), a bucket elevator (3), a feeder (4) and a sand feeding auger (33); the method is characterized in that: the steel structure base (1) is symmetrically provided with two sand tanks (2); a bucket elevator (3) is arranged between one ends of the two-component sand tanks (2); a feeder (4) is arranged on the steel structure base (1) on one side of the lower end of the bucket elevator (3); the feeder (4) is communicated with the bucket elevator (3); a sand feeding auger (33) is arranged between the sand separating tanks (2) on the other side of the upper end of the bucket elevator (3) through a dividing disc (34); the outlet of the bucket elevator (3) is communicated with the sand feeding auger (33) through an adapter (36); two groups of dustproof joints (37) are symmetrically arranged at the upper end of the sand separating tank (2); the dustproof joint (37) is intermittently communicated with the sand feeding auger (33);

a feeding sleeve (40) is arranged in the middle of the upper end of the sand feeding auger (33); a plurality of sealing rings (41) are arranged on the circumferential surface of the upper end of the feeding sleeve (40); a feeding sleeve (40) of the sand feeding auger (33) is communicated with an outlet of the bucket elevator (3) through a connector (36); two sides of the lower part of the sand feeding auger (33) are respectively provided with a discharging sleeve (42); the end surface of the lower end of the discharging sleeve (42) is of an inclined surface structure;

the adapter (36) comprises a left half sleeve (43), a right half sleeve (44) and a locking bolt (45); the upper ends of the left half sleeve (43) and the right half sleeve (44) are provided with flange half rings (46); the lower ends of the left half sleeve (43) and the right half sleeve (44) are provided with sealing half rings (53); one ends of the sealing half rings (53) are hinged with each other through rotating pins (54); the other ends of the sealing half rings (53) are mutually connected through connecting lugs (47) and locking bolts (45); the left half sleeve (43) and the right half sleeve (44) are buckled to form a cylindrical structure, and a flange whole is formed between the flange half rings (46) at the upper ends of the left half sleeve (43) and the right half sleeve (44); a sealing whole ring is formed between the sealing half rings (53) at the lower ends of the left half sleeve (43) and the right half sleeve (44); the inner wall of the sealing whole ring is provided with sealing ring grooves (49) at intervals; the sealing ring groove (49) is movably connected with a sealing ring (41) on the feeding sleeve (40) in a clamping way;

the dustproof joint (37) comprises a bearing ring (50), a flexible sleeve (35), a guide cylinder (52), a collapsing rod (51) and a buffer spring (48); the upper end of the inlet of the sand separating tank (2) is obliquely provided with a bearing ring (50); a plurality of collapsing rods (51) are fixedly arranged at the lower end of the bearing ring (50); a guide cylinder (52) is fixedly arranged on the sand separating tank (2) below the collapsing rod (51); the collapsing rod (51) is inserted into and connected with the guide cylinder (52); a buffer spring (48) is arranged in a guide cylinder (52) below the collapsing rod (51); the inner edge opening of the bearing ring (50) is connected with a flexible sleeve (35) in a sealing way; the lower end of the flexible sleeve (35) is hermetically connected with an inlet of the sand separating tank (2);

when the sand feeding auger (33) rotates to be in contact with the bearing ring (50), the discharging sleeve (42) on the sand feeding auger (33) can extrude the bearing ring (50) in an inclined state through the inclined plane of the discharging sleeve in the rotating process; so that the bearing ring (50) can move downwards after overcoming the elasticity of the buffer spring (48) under the guidance of the collapse rod (51) after being stressed; when the sand feeding auger (33) runs to a designated position, the bearing ring (50) is in contact sealing connection with the discharging sleeve (42) of the sand feeding auger (33) under the action of the elastic force of the buffer spring (48); when the fracturing propping agent is operated, the fracturing propping agent output by the discharging sleeve (42) enters the sand separating tank (2) through the dustproof joint (37).

2. A sand supply apparatus suitable for use in oilfield fracturing operations as claimed in claim 1; the method is characterized in that: an automatic suspension arm (38) is arranged on the steel structure base (1) on one side of the feeder (4); a counterweight seat (39) is connected on the steel structure base (1) at one side of the automatic suspension arm (38).

3. A sand supply apparatus suitable for use in oilfield fracturing operations as defined in claim 1, wherein: the feeder (4) comprises a feeding sand hopper (8), a bag breaking cone (9), a bag breaking knife (11) and a feeding rack (7); the steel structure base (1) is provided with a feeding rack (7); a feeding sand hopper (8) is arranged on the feeding frame (7); the lower end of the feeding sand hopper (8) is communicated with an inlet of the bucket elevator (3); two groups of bag breaking cones (9) are arranged in the middle of the feeding sand hopper (8); the lower end of the bag breaking cone (9) is fixedly connected with the interior of the feeding sand hopper (8) through a plurality of uniformly distributed support rods (10); the outer side of the support rod (10) is provided with a bag breaking knife (11).

4. A sand supply apparatus suitable for use in oilfield fracturing operations as defined in claim 1, wherein: the sand separating tank (2) comprises a bottom layer frame (14), a middle frame (17), a lower tank body (15), a middle tank body (18) and an upper tank body (32); a bottom layer framework (14) is fixedly arranged on the steel structure base (1); two groups of lower tank bodies (15) are symmetrically arranged in the bottom layer framework (14); a plurality of supporting pins (16) are uniformly distributed at the top end of the bottom layer frame (14); a middle frame (17) is arranged on the bottom layer frame (14) through a supporting pin (16); a middle tank body (18) is fixedly arranged in the middle frame (17); the lower end of the middle tank body (18) is in a closing-up structure; the lower end of the middle tank body (18) is hermetically connected with the lower tank body (15) through a sealing structure; a plurality of supporting pins (16) are uniformly distributed at the top of the middle frame (17); the top of the middle frame (17) is provided with an upper tank body (32) through a supporting pin (16); the upper tank body (32) and the middle tank body (18) are mutually connected in a sealing way through a sealing structure; the middle parts of the middle tank body (18) and the upper tank body (32) are respectively provided with a partition plate (19); the partition plate (19) divides the interior of the middle tank body (18) and the interior of the upper tank body (32) into two independent material storage bins; the lower end of the storage bin is communicated with the lower tank body (15); the middle tank body (18) is fixedly connected with the lower tank body (15) and the upper tank body (32) through locking pieces (20) respectively; the supporting pin (16) is in a step-shaped structure; a certain gap is reserved between the upper tank body (32) and the middle tank body (18) under the action of the supporting pin (16); a certain gap is reserved between the middle tank body (18) and the lower tank body (15); the sealing structure comprises a sealing ring (21) and a sealing strip (22); the top of the middle tank body (18) is welded with a sealing ring (21); sealing strips (22) are welded on the periphery of the lower part of the upper tank body (32); after the upper tank body (32) and the middle tank body (18) are assembled, a labyrinth structure is formed between the sealing ring (21) and the sealing strip (22); sealing strips (22) are welded around the bottom of the middle tank body (18); a sealing ring (21) is welded at the upper end of the lower tank body (15); after the lower tank body (15) and the middle tank body (18) are assembled, a labyrinth structure is formed between the sealing ring (21) and the sealing strip (22).

5. A sand supply device suitable for use in oilfield fracturing operations as defined in claim 4, wherein: the locking piece (20) comprises a hinge seat (23), a rotating screw rod (24), a locking nut (25), a supporting seat (26) and a supporting turnover plate (27); a rotary screw rod (24) is movably hinged on the hinge seat (23); a supporting seat (26) is arranged above the hinged seat (23); the upper end of the supporting seat (26) is hinged with a supporting turnover plate (27); the support turning plate (27) is provided with an assembling hole; the rotary screw (24) is connected with a locking nut (25) through threads after penetrating through the assembly hole; a plurality of hinged seats (23) are welded on the lower tank body (15); a plurality of supporting seats (26) are welded at the lower end of the middle frame (17) correspondingly; the upper end of the middle frame (17) is welded with a plurality of hinged seats (23), and the lower end of the upper tank body (32) is correspondingly welded with a plurality of supporting seats (26); the lower tank body (15) is of a conical structure; the lower end of the lower tank body (15) is provided with a discharge chute (29) through a control gate valve (28).