CN209115068U - A kind of two-tube annular space sand setting sand-bailing equipment - Google Patents

Abstract

A kind of two-tube annular space sand setting sand-bailing equipment, its technical solution is: including plunger pull rod, liquid outlet channel, assembly for plunger, pump barrel, fixed valve assembly, sand screen, connecting tube, bridge type suspension connector, take out sand central tube, sand setting outer tube, tail pipe snap switch, bottom sand shovel, the inside of pump barrel connects outlet tube, the top of outlet tube connects plunger pull rod, assembly for plunger inside the lower part connection pump barrel of outlet tube, plunger pull rod lower end connects sand pump assembly for plunger, upper end is connect with oil pipe or continuous lever, assembly for plunger is mounted in pump barrel, assembly for plunger and pump barrel have fit clearance, the top connected pipes of plunger pull rod are to bailing well section, the tail portion of pump barrel is equipped with fixed valve assembly, pump barrel lower part is connected through a screw thread with connecting tube, the top of connecting tube is equipped with sand screen, the beneficial effects of the utility model are: passing through plunger pull rod, plunger Assembly, pump barrel, fixed valve assembly and sand screen are used to solve the smooth suction of mulling liquid, it filters out the sand being pumped in and does not enter pump barrel, make sand pump work well, bridge type suspension connector, take out sand central tube, sand setting outer tube, tail pipe snap switch be used to solve mulling liquid can high flow rate take sand and pass through central tube, enter sand setting annular space chamber by the channel of bridge-type connector two sides, and makes to take sand mixed liquor feed pathway unimpeded always.

Description

A kind of two-tube annular space sand setting sand-bailing equipment

Technical field

The present invention relates to a kind of a kind of two-tube annular space sand setting sand-bailing equipments of petroleum industry, in particular to a kind of to be suitable for adopting Oily (gas) well low pressure leakage oil reservoir shaft bottom sand setting is cleaned to ground, keeps pit shaft unobstructed, realizes the rapidly and efficiently clear of shaft bottom sand setting Reason.

Background technique

In oil reservoir recovery process, sand production not only results in oil well pump damage, leakage, and holddown is caused when serious, is broken The accidents such as bar, sand pipe laying column or even sand bury oil reservoir.The prior art:

1, hydraulic sand washing: first is that working fluid is injured to chronostratigraphic zone, polluted reservoir influences oil well productivity；Second is that for super Deep, major diameter severe leakage layer deficit stratum, it is most of to rush since the head of liquid of sand washing is far longer than strata pressure Sand liquid has leaked into stratum, and only a small amount of sand cleaning fluid returns out ground, and leaks into oil with sand cleaning fluid by the sand major part that punching floats Layer macropore, only accounts for sub-fraction with the sand that sand cleaning fluid returns out ground, floats outstanding sand with waterpower sometimes and is deposited on shaft bottom again, It causes sand washing pipe clamp to bury accident, increases the difficulty of operation, some low-pressure absorption wells are even without returning out.

2, fish out sand: the negative pressure liquid stream generated using bailing pump is carried sand liquid and enters sand setting tail pipe, fishes for well inner product to reach The purpose of sand.Weight of the existing bailing pump in well is supported by sand face, is above mentioned oil pipe and is driven pitch brace piston stroking upward, top is single It flows valve to close, lower part bottom valve is opened, and forms vacuum in bailing pump, and liquid carries sand high speed under the action of pressure difference and enters in well Sand sediment pipe, sand sediment pipe decline with the reduction in sand face in well.Sand and when liquid uplink in sand sediment pipe, sand and liquid are by weight Power difference is from, liquid upper, and sand is under.When lower drain line, piston downlink, top ball-and-seat is opened, and lower part bottom valve is closed, sand Son cannot return in casing, and liquid of the top without sand is returned to oil sets annular space by ball-and-seat and circulation port.This Sample moves back and forth, until being extracted into design requirement position or artificial bottom of a well, pit shaft product sand is removed clean.Advantage is fishing sand operation wind Danger is small, without formation contaminant, easy to operate, significant effect, is very suitable to low pressure leakage oil-water well stratum sand removal operation；The disadvantage is that existing There is bailing pump as a kind of underground operation tool, there are some faults of construction, it is small to fish out sand amount, is easy sand card column plug, sand is nuzzled liquid Valve ball is high to fishing sand pumping rate request.

By being analyzed the scene fishing frequent problem of sand operation, existing bailing pump is improved, is reached Safety work and the efficiently purpose of fishing sand.

Summary of the invention

The purpose of the present invention is to drawbacks described above of the existing technology, provide a kind of two-tube annular space sand setting fishing sand dress It sets, by using the double-deck sand setting tail pipe, intermediate feed liquor, the principle of annular space sand setting solves the problems, such as that sand buries liquid feed valve；It is taking out simultaneously Sand screen is installed in sand pump assembly lower end, filters out the sand being pumped in, sand pump is enable to work normally；Central tube feed liquor, adds Big flow velocity, improves and takes out sand ability.

Its technical solution is: including plunger pull rod, liquid outlet channel, assembly for plunger, pump barrel, fixed valve assembly, sand screen, company Adapter tube, bridge type suspension connector take out sand central tube, sand setting outer tube, tail pipe snap switch, bottom sand shovel, and the inside of pump barrel connects out Liquid pipe, the top of outlet tube connect plunger pull rod, the assembly for plunger inside the lower part connection pump barrel of outlet tube, plunger pull rod lower end Sand pump assembly for plunger is connected, upper end is connect with oil pipe or continuous lever, and assembly for plunger is mounted in pump barrel, assembly for plunger and pump barrel There is fit clearance, for the top connected pipes of plunger pull rod to bailing well section, the tail portion of pump barrel is equipped with fixed valve assembly, pump barrel lower part It is connected through a screw thread with connecting tube, the top of connecting tube is equipped with sand screen, the upper end of the sand screen and fixed valve assembly bottom Portion connects and is suspended on the inside of connecting tube, there is certain gap runner between the sand screen and connecting tube, in connecting tube Portion connects pump barrel, and connecting tube lower end connects sand setting outer tube, takes out sand central tube and is suspended in sand setting outer tube by bridge-type connector, takes out sand The inside of central tube is equipped with annular space area as sand setting cavity, and a part is stretched out by tail pipe snap switch in the bottom for taking out sand central tube Distance, tail pipe snap switch are connect with sand setting outer pipe bottom, and tail pipe snap switch is equipped with the closing of spring control loose-leaf, are taken out in sand Heart pipe is forced through downwards snap switch, and loose-leaf is opened, and the lower end connection bottom sand shovel of the tail pipe snap switch is used for Cementing sand setting is smashed to pieces, convenient for sucking out of central tube.

The plunger pull rod lower end connects sand pump assembly for plunger, and upper end is connect with oil pipe or continuous lever, assembly for plunger It is mounted in pump barrel, assembly for plunger and pump barrel have fit clearance.

There is limit hoop in the upper end of the pump barrel, deviate from assembly for plunger will not from pump barrel, and limit certain movement Stroke.

The fixation valve assembly is fixed on the lower end of pump barrel, when assembly for plunger moves upwards, the valve ball of fixed valve assembly Feed liquor is opened, while the travelling valve of assembly for plunger is closed, upward drain.

The bridge type suspension connector with passageway bridge design, centre connect with the pumping sand central tube of lower part, outer rim and Connecting tube connection, upper end design has lateral mulling liquid to exclude channel, and has umbrella sand block structure, when guaranteeing that the sand to suspend sinks It falls in the annular space between central tube and sand sediment pipe.

The pumping sand center pipe outside diameter is smaller than sand setting outer tube diameter, is placed in sand sediment pipe.

It is continuous through-hole, flow channel of the continuous through-hole as mulling liquid among the sand setting central tube.

The beneficial effects of the present invention are: being used to by plunger pull rod, assembly for plunger, pump barrel, fixed valve assembly and sand screen The smooth suction for solving mulling liquid, filters out the sand being pumped in and does not enter pump barrel, make sand pump work well, bridge type suspension connects Head, take out sand central tube, sand setting outer tube, tail pipe snap switch be used to solve mulling liquid can high flow rate take sand by central tube, lead to The channel of bridge type connector two sides enters sand setting annular space chamber, and it is unimpeded always to make to take sand mixed liquor feed pathway, thus can be with Free hold fishes out sand speed, will not worry that sand buries tail pipe, tail pipe snap switch guarantees after central tube above mentions, and can close in time Tail portion channel, is retained in sand setting in sand sediment pipe, and the effect of bottom sand shovel is can to smash sand setting cementing in pit shaft to pieces, makes sand setting It can smoothly enter into central tube uplink.

Detailed description of the invention

Attached drawing 1 is structural schematic diagram of the invention；

Attached drawing 2 is the cross-sectional view for taking out sand central tube；

In above-mentioned figure: 1, plunger pull rod, 2, liquid outlet channel, 3, assembly for plunger, 4, pump barrel, 5, fixed valve assembly, 6, filter sand Pipe, 7, connecting tube, 8, bridge type suspension connector, 9, pumping sand central tube, 10, sand setting outer tube, 11, tail pipe snap switch, 12, bottom sand Shovel.

Specific embodiment

In conjunction with attached Fig. 1 and 2, the invention will be further described:

The present invention includes plunger pull rod, liquid outlet channel, assembly for plunger, pump barrel, fixed valve assembly, sand screen, connecting tube, bridge Formula suspension joint takes out sand central tube, sand setting outer tube, tail pipe snap switch, bottom sand shovel, and the inside of pump barrel connects outlet tube, out The top of liquid pipe connects plunger pull rod, the assembly for plunger inside the lower part connection pump barrel of outlet tube, and the connection of plunger pull rod lower end is taken out Sand pump assembly for plunger, upper end are connect with oil pipe or continuous lever, and assembly for plunger is mounted in pump barrel, and assembly for plunger and pump barrel have cooperation Gap, the top connected pipes of plunger pull rod to bailing well section, the tail portion of pump barrel are equipped with fixed valve assembly, pump barrel lower part with connect Pipe is connected through a screw thread, and the top of connecting tube is equipped with sand screen, and the upper end of the sand screen is connect with fixed valve assembly bottom And it is suspended on the inside of connecting tube, there are certain gap runner, the connection of connecting tube top between the sand screen and connecting tube Pump barrel, connecting tube lower end connect sand setting outer tube, take out sand central tube and are suspended in sand setting outer tube by bridge-type connector, take out sand central tube Inside be equipped with annular space area and be used as sand setting cavity, take out the bottom of sand central tube by a part of distance of tail pipe snap switch stretching, Tail pipe snap switch is connect with sand setting outer pipe bottom, and tail pipe snap switch is equipped with the closing of spring control loose-leaf, takes out sand central tube It is forced through snap switch downwards, loose-leaf is opened, the lower end connection bottom sand shovel of the tail pipe snap switch, for smashing to pieces Cementing sand setting, convenient for being sucked out of central tube.

Preferably, plunger pull rod lower end connects sand pump assembly for plunger, and upper end is connect with oil pipe or continuous lever, assembly for plunger It is mounted in pump barrel, assembly for plunger and pump barrel have fit clearance.

Preferably, there is limit hoop in the upper end of pump barrel, deviate from assembly for plunger will not from pump barrel, and limit certain movement Stroke.

Preferably, fixed valve assembly is fixed on the lower end of pump barrel, when assembly for plunger moves upwards, the valve ball of fixed valve assembly Feed liquor is opened, while the travelling valve of assembly for plunger is closed, upward drain.

Preferably, bridge type suspension connector with passageway bridge design, centre connect with the pumping sand central tube of lower part, outer rim and Connecting tube connection, upper end design has lateral mulling liquid to exclude channel, and has umbrella sand block structure, when guaranteeing that the sand to suspend sinks It falls in the annular space between central tube and sand sediment pipe.

Preferably, it is smaller than sand setting outer tube diameter to take out sand center pipe outside diameter, is placed in sand sediment pipe.

It preferably, is continuous through-hole, flow channel of the continuous through-hole as mulling liquid among sand setting central tube.

Working principle:

A kind of construction technology of two-tube annular space sand setting sand-bailing equipment: including the following steps,

Firstly, bailing pump is delivered to sand face position using oil pipe or coiled tubing, weight is supported by sand face, when above mentioning oil Guan Shi, the closing of assembly for plunger valve ball above mention, and fixed valve valve ball is opened, pump barrel feed liquor, when plunger pull rod moves up and down, drive Assembly for plunger moves up and down in pump barrel, forms suction force and well liquid suction is come in；There is limit hoop in pump barrel upper end, keeps plunger total At will not deviate from from pump barrel, and limit certain stroke of motion.Fixed valve assembly is fixed on the lower end of pump barrel, and assembly for plunger is upward When movement, the valve ball of fixed valve assembly opens feed liquor, while the travelling valve of assembly for plunger is closed, upward drain；Assembly for plunger to When lower, the valve ball of fixed valve assembly is closed, and travelling valve is opened, by the up and down motion of assembly for plunger, well liquid from lower part tubing string Extraction, then oil jacket annulus is rejected to by the liquid outlet channel on plunger pull rod；The lower end of fixed valve assembly connects sand screen, juxtaposition In in connecting tube, sand screen is used to filter out the sand that suction is come in, and does not allow sand to enter pump barrel holddown or buries valve ball, valve Seat, sand setting under the action of negative pressure with take sand flow body sucking take out sand central tube in flow up；

Secondly, a part is deposited in annular space downwards after bridge type connector, a part is continued to move up with liquid stream, After sand screen filters, when plunger moves down, fixed valve is closed, and liquid stream stops, and sand is deposited in annular space downwards, bridge-type Suspension joint is designed with passageway bridge, and centre is connect with the pumping sand central tube of lower part, and outer rim is connect with connecting tube, upper end design There is lateral mulling liquid to exclude channel, and have umbrella sand block structure, guarantees to fall in central tube and sand sediment pipe when the sand to suspend sinks Between annular space in, it is smaller than sand setting outer tube diameter to take out sand center pipe outside diameter, is placed in sand sediment pipe, and placed in the middle cross biases, in sand setting It is continuous through-hole, the flow channel as mulling liquid among heart pipe.Tail pipe snap switch is connect with sand setting outer pipe bottom, there is spring The closing of loose-leaf is controlled, sand central tube is taken out and is forced through snap switch downwards, loose-leaf is opened；Central tube will stretch out one section of switch Distance, convenient for the entrance of mulling liquid；When central tube above proposes the position of the switch, switch loose-leaf is closed under the action of the spring, is avoided Sand setting in sand sediment pipe falls into pit shaft again, and the lower end connection bottom sand of tail pipe snap switch shovels, for smashing cementing sand setting to pieces, Convenient for being sucked out of central tube；

Finally, filtered well liquid is discharged in casing annulus with liquid outlet channel, by playing lower tubular column suction fishing sand repeatedly It to projected depth, acts bailing pump and lets out sand, if not reaching projected depth repeats fishing sand.

The above is only presently preferred embodiments of the present invention, and anyone skilled in the art is possibly also with upper Equivalent technical solution is modified or be revised as to the technical solution for stating elaboration to the present invention.Therefore, according to the present invention Any simple modification or substitute equivalents that technical solution is carried out, belong to the greatest extent the scope of protection of present invention.

Claims (7)

1. a kind of two-tube annular space sand setting sand-bailing equipment, it is characterized in that: include plunger pull rod, liquid outlet channel, assembly for plunger, pump barrel, Fixed valve assembly, connecting tube, bridge type suspension connector, takes out sand central tube, sand setting outer tube, tail pipe snap switch, bottom sand at sand screen Shovel, the inside of pump barrel connect outlet tube, and the top of outlet tube connects plunger pull rod, the column inside the lower part connection pump barrel of outlet tube Assembly is filled in, plunger pull rod lower end connects sand pump assembly for plunger, and upper end is connect with oil pipe or continuous lever, and assembly for plunger is mounted on pump In cylinder, assembly for plunger and pump barrel have fit clearance, and to bailing well section, the tail portion of pump barrel is equipped with the top connected pipes of plunger pull rod Fixed valve assembly, pump barrel lower part are connected through a screw thread with connecting tube, and the top of connecting tube is equipped with sand screen, the sand screen Upper end connect and is suspended on the inside of connecting tube with fixed valve assembly bottom, has between the sand screen and connecting tube certain Gap runner, connecting tube top connect pump barrel, and connecting tube lower end connects sand setting outer tube, take out sand central tube and are hung by bridge-type connector In sand setting outer tube, the inside for taking out sand central tube is equipped with annular space area as sand setting cavity, and the bottom for taking out sand central tube passes through tail pipe Snap switch stretches out a part of distance, and tail pipe snap switch is connect with sand setting outer pipe bottom, and tail pipe snap switch is equipped with spring control The closing of loose-leaf processed takes out sand central tube and is forced through snap switch downwards, loose-leaf opened, under the tail pipe snap switch End connection bottom sand shovel, for smashing cementing sand setting to pieces, convenient for being sucked out of central tube.

2. a kind of two-tube annular space sand setting sand-bailing equipment according to claim 1, it is characterized in that: the plunger pull rod lower end Sand pump assembly for plunger is connected, upper end is connect with oil pipe or continuous lever, and assembly for plunger is mounted in pump barrel, assembly for plunger and pump barrel There is fit clearance.

3. a kind of two-tube annular space sand setting sand-bailing equipment according to claim 1, it is characterized in that: the upper end of the pump barrel has Hoop is limited, deviate from assembly for plunger will not from pump barrel, and limit certain stroke of motion.

4. a kind of two-tube annular space sand setting sand-bailing equipment according to claim 1, it is characterized in that: the fixation valve assembly is solid It is scheduled on the lower end of pump barrel, when assembly for plunger moves upwards, the valve ball of fixed valve assembly opens feed liquor, while the travelling of assembly for plunger Valve is closed, upward drain.

5. a kind of two-tube annular space sand setting sand-bailing equipment according to claim 1, it is characterized in that: the bridge type suspension connector It is designed with passageway bridge, centre is connect with the pumping sand central tube of lower part, and outer rim is connect with connecting tube, and upper end design has lateral mixed Sand liquid excludes channel, and has umbrella sand block structure, guarantees to fall in the ring between central tube and sand sediment pipe when the sand to suspend sinks In the air.

6. a kind of two-tube annular space sand setting sand-bailing equipment according to claim 1, it is characterized in that: outside the pumping sand central tube Diameter is smaller than sand setting outer tube diameter, is placed in sand sediment pipe.

7. a kind of two-tube annular space sand setting sand-bailing equipment according to claim 1, it is characterized in that: in the sand setting central tube Between be continuous through-hole, flow channel of the continuous through-hole as mulling liquid.