CN209924971U

CN209924971U - Layered sand and gravel prevention filling tool

Info

Publication number: CN209924971U
Application number: CN201920729294.XU
Authority: CN
Inventors: 张景全; 张振浩; 牛利昌
Original assignee: Dongying Kenli Ruijia Machinery Co Ltd
Current assignee: Dongying Kenli Ruijia Machinery Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-01-10
Anticipated expiration: 2029-05-21

Abstract

The utility model discloses a layering sand prevention gravel packing instrument, the utility model discloses an inner tube and the setting subassembly that is located the inner tube outside, release subassembly, seal assembly, anchor subassembly, packing subassembly and salvage the deblocking subassembly, the setting subassembly include steel ball, top connection, hydraulic cylinder, setting piston, spacer sleeve, setting shear pin, catch and sheath, the release subassembly include the center tube, salvage the deblocking subassembly including salvage joint and deblocking shear pin, seal assembly including the seat that seals, seal the pipe, seal the body and adjustable ring, the anchor subassembly include cone, slip cover, slips, return spring and lower cone. The utility model discloses a two-way slips anchoring, the anchoring is reliable, and has improved the layering sealing performance.

Description

Layered sand and gravel prevention filling tool

Technical Field

The utility model relates to a technical field is equipped to the oil, concretely relates to sand prevention gravel in layering fills instrument.

Background

When the oil field is used for exploiting the loose sandstone oil reservoir, because the oil reservoir is cemented and loose, during exploitation, formation sand is carried to a shaft along with oil flow and is gradually separated out to be deposited at the bottom of a well and slowly accumulated, so that the oil reservoir is buried, and the production of the oil well is influenced. Therefore, a plurality of sand control process technologies are formed by research, and gravel packing sand control is an effective and good sand control process currently. While gravel packing tools are the core tools for carrying out the process, the existing gravel packing tools have relatively poor packing effect.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: provides a layered sand-prevention gravel packing tool with good packing effect.

In order to solve the problems, the utility model comprises an inner pipe, a setting component, a releasing component, a sealing component, an anchoring component, a filling component and a fishing and deblocking component, wherein the setting component is arranged outside the inner pipe and comprises a steel ball, an upper joint, a hydraulic cylinder, a setting piston, a blocking sleeve, a setting shear pin, a locking ring and a sheath, the releasing component comprises a central pipe, the fishing and deblocking component comprises a fishing joint and a releasing shear pin, the inner side of the upper joint is in threaded connection with the inner pipe, the outer side of the upper joint is in threaded connection with the hydraulic cylinder, the setting piston is arranged between the inner pipe and the hydraulic cylinder in a sliding way, the blocking sleeve is connected in the hydraulic cylinder in a sliding way, the upper end of the blocking sleeve is abutted against the setting piston, the fishing joint is fixedly connected with the upper end of the central pipe, the fishing joint is arranged between the inner pipe and the blocking sleeve, the setting shear pin is arranged between the blocking sleeve and the fishing joint, the lower end of, the lower extreme and the seal assembly of sheath are connected, seal assembly including sealing the seat, sealing the tube, packing spare and adjustable ring, anchor assembly include cone, slip cover, slips, return spring and lower cone, the lower extreme and the seat spiro union that seals of sliding sleeve, packing spare clamp are established between seat and the adjustable ring of sealing, adjustable ring and last cone spiro union, the upper end of sealing the tube is passed through the boss joint on the closing cap seat, the lower extreme and the last cone spiro union of sealing the tube, slips and return spring set up at last cone and down between the cone, the slip cover is used for spacing last cone and lower cone, the lower extreme and the lower cone spiro union of center tube, the deblocking shear pin sets up between center tube and salvage joint.

In order to facilitate gravel filling, the filling assembly comprises a filling sleeve, a flow guide sleeve, a sliding sleeve, a control shear pin and a shunt joint, wherein the upper end of the filling sleeve is in threaded connection with a lower cone, a liquid flow hole is formed in the middle of the filling sleeve, the flow guide sleeve is connected to the liquid flow hole of the filling sleeve through threads, a corresponding liquid flow hole is formed in the lower part of the inner tube, the sliding sleeve is arranged in the inner tube in a sliding mode, and the control shear pin is arranged between the sliding sleeve and the inner tube; the shunt joint is arranged between the filling sleeve and the inner pipe, a pin is arranged between the shunt joint and the inner pipe, and a through hole corresponding to a liquid flow hole in the filling sleeve is formed in the shunt joint.

As optimizing, the lower extreme of inner tube be connected with joint Assembly, joint Assembly including well-flushing short circuit, safety joint, lower clutch and flushing pipe joint, be provided with the single current valve ball in the flushing pipe joint, the well-flushing short circuit fix the lower extreme at the inner tube, safety joint be located the outside of well-flushing short circuit, and with fill the cover spiro union, the lower clutch spiro union on safety joint, flushing pipe joint spiro union on well-flushing short circuit.

The utility model has the advantages that:

1. and the bidirectional slips are adopted for anchoring, so that the anchoring is reliable, and the layered sealing performance is improved.

2. The filling assembly is provided with a flow guide sleeve, so that the size of a filling opening can be adjusted, the flow direction can be adjusted, and the protective sleeve is effective in filling.

3. The tool is designed with a circulating filling function, and can be used for filling high-pressure stratum and circulating annular space.

4. A back-off safety mechanism is designed on the lower joint of the filling tool, and when the lower sand prevention pipe is blocked during pipe lifting, the lower sand prevention pipe can be separated from the lower sand prevention pipe to safely lift the filling tool.

Drawings

Fig. 1 is a schematic structural view of an upper section of the present invention;

FIG. 2 is a schematic structural view of an intermediate member of the present invention;

fig. 3 is a schematic structural diagram of the lower segment of the present invention.

Wherein: 1. the device comprises an upper joint, 2, a hydraulic cylinder, 3, a setting piston, 4, a blocking sleeve, 5, an inner pipe, 6, a fishing joint, 7, a setting shear pin, 8, a locking ring, 9, a sheath, 10, a central pipe, 11, a deblocking shear pin, 12, a packing seat, 13, a packing pipe, 14, a packing part, 15, an adjusting ring, 16, an upper cone, 17, a slip sleeve, 18, a slip, 19, a return spring, 20, a lower cone, 21, a filling sleeve, 22, a steel ball, 23, a flow guide sleeve, 24, a sliding sleeve, 25, a control shear pin, 26, a shunt joint, 27, a pin, 28, a safety joint, 29, a well flushing short joint, 30, a lower joint, 31, a check valve ball, 32 and a flushing joint.

Detailed Description

The layered sand and gravel packing tool shown in fig. 1-3 comprises an inner pipe 5, and a setting assembly, a releasing assembly, a sealing assembly, an anchoring assembly, a packing assembly and a fishing and deblocking assembly which are positioned outside the inner pipe 5, wherein the setting assembly comprises a steel ball 22, an upper joint 1, a hydraulic cylinder 2, a setting piston 3, a spacer sleeve 4, a setting shear pin 7, a locking ring 8 and a sheath 9, the releasing assembly comprises a central pipe 10, the fishing and deblocking assembly comprises a fishing joint 6 and a releasing shear pin 11, the inner side of the upper joint 1 is in threaded connection with the inner pipe 5, the outer side of the upper joint 1 is in threaded connection with the hydraulic cylinder 2, the setting piston 3 is slidably arranged between the inner pipe 5 and the hydraulic cylinder 2, the spacer sleeve 4 is slidably connected in the hydraulic cylinder 2, the upper end of the spacer sleeve 4 is abutted against the setting piston 3, the fishing joint 6 is fixedly connected with the upper end of the central pipe 10, the fishing joint 6 is positioned between the inner pipe 5 and the spacer sleeve 4, the setting shear pin 7 is arranged between the retaining sleeve 4 and the fishing joint 6, the lower end of the retaining sleeve 4 is in threaded connection with the upper end of the sheath 9, the lower end of the sheath 9 is connected with the sealing component, the sealing assembly comprises an packer seat 12, a packer pipe 13, a packer part 14 and an adjusting ring 15, the anchoring assembly comprises an upper cone 16, a slip sleeve 17, a slip 18, a return spring 19 and a lower cone 20, the lower end of a sliding sleeve 24 is in threaded connection with a packing seat 12, a packing part 14 is clamped between the packing seat 12 and an adjusting ring 15, the adjusting ring 15 is in threaded connection with the upper cone 16, the upper end of a packing tube 13 is in clamped connection with a sealing cover seat 12 through a boss, the lower end of the packing tube 13 is in threaded connection with the upper cone 16, the slip 18 and the return spring 19 are arranged between the upper cone 16 and the lower cone 20, the slip sleeve 17 is used for limiting the upper cone 16 and the lower cone 20, the lower end of a central tube 10 is in threaded connection with the lower cone 20, and a deblocking shear pin 11 is arranged between the central tube 10 and a fishing joint 6.

The subassembly of filling described in this embodiment is including filling cover 21, water conservancy diversion cover 23, sliding sleeve 24, control shear pin 25 and reposition of redundant personnel joint 26, fill cover 21 upper end and the spiro union of lower cone 20, the middle part of filling cover 21 is provided with the liquid flow hole, water conservancy diversion cover 23 pass through threaded connection and fill the liquid flow hole department of cover 21, the lower part of inner tube 5 be provided with corresponding liquid flow hole, sliding sleeve 24 slide and set up in inner tube 5, and control shear pin 25 sets up between sliding sleeve 24 and inner tube 5, reposition of redundant personnel joint 26 set up and fill between cover 21 and the inner tube 5, be provided with pin 27 between reposition of redundant personnel joint 26 and the inner tube 5, and be provided with on the reposition of redundant personnel joint 26 and fill the corresponding through-hole of liquid flow hole on the cover 21. The lower extreme of inner tube 5 be connected with joint Assembly, joint Assembly including well-flushing short circuit 29, safety joint 28, lower clutch 30 and flushing pipe joint 32, be provided with single current valve ball 31 in the flushing pipe joint 32, well-flushing short circuit 29 fix the lower extreme at inner tube 5, safety joint 28 be located well-flushing short circuit 29's the outside, and with fill the cover 21 spiro union, lower clutch 30 spiro union on safety joint 28, flushing pipe joint 32 spiro union on well-flushing short circuit 29.

The working principle is as follows: setting: the steel ball 22 is put into the inner pipe 5, then the steel ball is pressed, hydraulic pressure acts on the setting piston 3, the setting piston 3 pushes the blocking sleeve 4, the setting shear pin 7 between the blocking sleeve 4 and the fishing joint 6 is broken by pressure and then continues to descend, the sealing part 14 is extruded by the sealing seat 12 to expand, the slip 18 is pushed to open by the upper cone 16, and setting is completed.

And (3) gravel packing process: after the setting is finished, the pressurizing is continued, the pressure acts on the sliding sleeve 24 through the steel ball 22 until the control shear pin 25 between the sliding sleeve 24 and the inner pipe 5 is broken, the sliding sleeve 24 moves downwards, the liquid flow hole on the inner pipe 5 is not blocked by the sliding sleeve 24, the filling channel is opened to start the filling operation, the sand-carrying liquid is pumped in from the oil pipe and enters the annular space between the sieve pipe and the casing pipe through the liquid flow hole of the inner pipe 5 and the liquid flow hole of the filling sleeve 21, the sand-carrying liquid can only reach the sieve pipe downwards due to the sealing effect of the sealing part 14, gravel is blocked outside the sieve pipe to form a gravel filling layer, the liquid flows in through the single-flow sieve joint, enters the annular backflow channel through the valve ball 31 on the upper part of the flushing pipe joint 32, and flows into the.

And (3) backwashing: and pumping flushing fluid from the casing during reverse flushing, wherein the flushing fluid reaches the lower annular space from top to bottom through a gap between the oil pipe and the casing, enters the filling tool through the fluid hole of the inner pipe 5 and the filling sleeve 21, and flushes the filling tool and redundant gravels in the oil pipe to the ground.

And (4) releasing the hands: adjusting the hanging weight of the pipe column, enabling the central pipe 10 of the filling tool to be located at the neutral point position of the pipe column, rotating the pipe column by right hand to invert the left-handed thread on the upper part of the central pipe 10, realizing the releasing, lifting the pipe column above the releasing, and lifting the pipe column to complete gravel filling sand prevention.

Fishing and unsealing processes: during next operation, the tubing fishing spear is buckled to the fishing joint 6, the pipe column is lifted directly to cut the deblocking shear pin 11, the packing part 14 and the slips 18 can be released by continuously lifting, the filling tool is deblocked, the filling tool and the sand control pipe in the well are lifted out, deblocking is achieved, and the part of the reserved well is lifted out.

The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the forms and styles of the above embodiments, and any suitable changes or modifications made thereto by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a sand gravel pack instrument is prevented in layering which characterized in that: the setting assembly comprises a steel ball, an upper joint, a hydraulic cylinder, a setting piston, a blocking sleeve, a setting shear pin, a locking ring and a sheath, the setting assembly comprises a steel ball, a setting joint, a hydraulic cylinder, a setting piston, a blocking sleeve, a setting shear pin, a locking ring and a sheath, the setting assembly comprises a central pipe, the fishing deblocking assembly comprises a fishing joint and a deblocking shear pin, the inner side of the upper joint is in threaded connection with the inner pipe, the outer side of the upper joint is in threaded connection with the hydraulic cylinder, the setting piston is slidably arranged between the inner pipe and the hydraulic cylinder, the blocking sleeve is slidably connected in the hydraulic cylinder, the upper end of the blocking sleeve is abutted against the setting piston, the fishing joint is fixedly connected with the upper end of the central pipe, the fishing joint is arranged between the inner pipe and the blocking sleeve, the setting shear pin is arranged between the blocking sleeve and the fishing joint, the lower end of the blocking sleeve is in threaded connection with the upper end of the sheath, and the lower end of, the seal assembly include and seal a seat, seal a tub, seal a separate body and adjustable ring, anchor assembly include cone, slip cover, slips, return spring and lower cone, the lower extreme and the seat spiro union that seals of sliding sleeve, seal the separate body clamp and establish between seat and adjustable ring, adjustable ring and last cone spiro union, the boss joint is passed through on the closing cap seat in the upper end of the tube that seals, the lower extreme and the last cone spiro union of the tube that seals, slips and return spring set up at last cone and down between the cone, the slip cover is used for spacing last cone and lower cone, the lower extreme and the lower cone spiro union of center tube, the setting of deblocking shear pin is between center tube and fishing joint.

2. The layered sand control gravel packing tool of claim 1, wherein: the filling assembly comprises a filling sleeve, a flow guide sleeve, a sliding sleeve, a control shear pin and a shunt joint, wherein the upper end of the filling sleeve is in threaded connection with the lower cone, a liquid flow hole is formed in the middle of the filling sleeve, the flow guide sleeve is connected to the liquid flow hole of the filling sleeve through threads, a corresponding liquid flow hole is formed in the lower part of the inner pipe, the sliding sleeve is arranged in the inner pipe in a sliding mode, and the control shear pin is arranged between the sliding sleeve and the inner pipe; the shunt joint is arranged between the filling sleeve and the inner pipe, a pin is arranged between the shunt joint and the inner pipe, and a through hole corresponding to a liquid flow hole in the filling sleeve is formed in the shunt joint.

3. The layered sand control gravel pack tool of claim 2, wherein: the lower extreme of inner tube be connected with joint Assembly, joint Assembly including well-flushing short circuit, safety joint, lower clutch and flushing pipe joint, be provided with the single current valve ball in the flushing pipe joint, the well-flushing short circuit fix the lower extreme at the inner tube, safety joint be located the outside of well-flushing short circuit, and with fill the cover spiro union, lower clutch spiro union on safety joint, flushing pipe joint spiro union on the well-flushing short circuit.