CN2486734Y - Double sand-containing barrel downhole bailing device - Google Patents

Abstract

The utility model relates to a two flourishing sand section of thick bamboo downhole bailing ware for oil well bailing operation is by upper and lower slot screen pipe 1, 6, upper and lower flourishing sand section of thick bamboo 2, 12, upper and lower low reaches move valve 3, 9, pressure differential valve 4, sealed bolster 5, communicating pipe 7, piston 8, scraping ring 10, upper and lower bottom valve 11, 13, one-way scraping leather cup 14 and sand pounding ware 15 and constitute. The bailing device has reasonable design, reliable work and high swabbing efficiency, can greatly improve the bailing operation efficiency and the production time efficiency of an oil well, can avoid sand blocking accidents, and is suitable for popularization and application.

Description

Double sand holding bucket down-hole sand pumping device

The utility model relates to a kind of downhole hardware that oil well drags for the sand operation that is used for.

Along with the continuity of oil mining process, the sand grains in the oil reservoir can be carried into pit shaft by oily stream inevitably, often also forms the sand post gradually in the shaft bottom deposition when serious, stops up oil flow channel, influences the oil well ordinary production.At this problem that generally and frequently takes place of sand production, on-the-spot when actively taking various sand-preventing process measures, need often carry out sand washing or drag for the sand operation.At present, the on-the-spot down-hole sand pumping device that uses when dragging for the sand operation has only a sand-filling cylinder, it is little that it holds the sand amount, pumping efficient is lower, and the sand card failure takes place easily, thereby drag for the sand operating efficiency and job schedule is restricted, and influence the oil well ordinary production, particularly poorer for higher its applicability of serious sand output well of pit shaft sand post.

The purpose of this utility model is to provide a kind of holds that the sand amount is big, pumping efficient height, can improve the double sand holding bucket down-hole sand pumping device that drags for sand operating efficiency and oil well production timeliness greatly.

The utility model is to realize like this.This kind down-hole sand pumping device is made up of upper and lower cutting seam sieve tube, upper and lower sand-filling cylinder, the upper and lower valve that moves about, pressure reduction valve, sealing bearing apparatus, communicating pipe, piston, the ring of strike-ofing, upper and lower bottom valve, unidirectional leather cup and the rramming device of strike-ofing, its structure, assembling feature are as follows: go up sand-filling cylinder top to be connected to cutting seam sieve tube on the screw thread, the bottom has been hinged with travelling valve, pressure reduction valve, communicating pipe, piston, time travelling valve, the ring of strike-ofing successively with screw thread; The sealing bearing apparatus was sleeved on outside communicating pipe, and the two is for flexibly connecting, its down with screw thread be hinged with down cutting seam sieve tube successively, gone up bottom valve, lower sand-holiding tube, following bottom valve and rramming device, the lower sand-holiding tube bottom outside is pressed with the unidirectional leather cup of strike-ofing with pressure ring.During use, this sand pumping device is carried G.I.H with wire rope or oil pipe, sucker rod.After the rramming device of sand pumping device lower end runs into the sand face, continue to transfer piston, the weight of top such as communicating pipe, sand-filling cylinder tubing string promotes piston and continues descending, through down bottom valve, lower sand-holiding tube, go up that the up liquid of bottom valve enters piston top by travelling valve down and through communicating pipe and go up travelling valve and enter sand-filling cylinder, enter pit shaft through last cutting seam sieve tube.Carry on piston begins on earth, the above tubing string of piston is up under the dynamic action of ground, and pump barrel then is close to the sand face with lower tubular column under action of gravity.At this moment, the upper and lower valve that moves about is closed, and upper and lower bottom valve is opened, at piston, down form the vacuum pumping below the travelling valve, in the pit shaft partially liq under the fluid column differential pressure action, unidirectional leather cup and the rramming device of strike-ofing of flowing through, sand setting in the well is risen, and liquid sand enters in the sand-filling cylinder jointly.Along with the reduction of sand face in the pit shaft, bottom tubing strings such as rramming device, sand-filling cylinder continue descending under action of gravity, and the mulling liquid bottom valve that continues to flow through down enters lower sand-holiding tube, the cutting seam sieve tube discharge of flowing through down of the liquid in the annular space of piston top.When piston stroking upward when sealing the bearing apparatus position, blocked by the positioning joint on the bearing apparatus, finish a reciprocation cycle.When continuing reciprocal pumping, the mulling liquid in the lower sand-holiding tube through last bottom valve, down travelling valve, communicating pipe, go up travelling valve and enter sand-filling cylinder, sand grains is left in the sand-filling cylinder, most of liquid is discharged through last cutting seam sieve tube.When the sand post in the last sand-filling cylinder reach a certain height, last travelling valve was with final plant closure.At this moment, if continue suction, the pressure reduction valve piston top tubing string and in the sand-filling cylinder under the acting in conjunction of sand grains gravity, open by fluid power, part mulling liquid enters pit shaft through the pressure reduction valve.In addition, the metal that install this sand pumping device piston bottom ring of strike-ofing, sand card in the time of can preventing descent of piston; The unidirectional leather cup of strike-ofing of containing the tube bottom setting down can scrape the sand grains that the annular space place between sand-filling cylinder and the oil well casing wall is detained, and prevents the sand card, and can guarantee when pumping that liquid can enter bottom valve down through the leather cup annular space of strike-ofing; The sealing bearing apparatus then can be avoided entering sand grains with stuck piston in the pump barrel of top with being used of following cutting seam sieve tube, and guarantees that piston and pump barrel be not by scratch.

The utility model is reasonable in design, reliable operation, and pumping efficient height utilizes it to improve greatly and drags for sand operating efficiency and oil well production timeliness, and can avoid sand card accident, is suitable for and applies.

Accompanying drawing is general structure of the present utility model and operating principle schematic diagram.Among the figure, label " 16 " is wire rope or oil pipe, sucker rod, and " 17 " are liquid level, and " 18 " are sleeve pipe, and " 19 " are mulling liquid, and " 20 " are the pit shaft sand setting, and " 21 " are the artificial bottom of a well, and " 22 " are oil reservoir.

Below in conjunction with accompanying drawing enforcement of the present utility model is described further.

As shown in the figure, the utility model is made up of upper and lower cutting seam sieve tube 1,6, upper and lower sand-filling cylinder 2,12, the upper and lower valve 3,9 that moves about, pressure reduction valve 4, sealing bearing apparatus 5, communicating pipe 7, piston 8, the ring 10 of strike-ofing, upper and lower bottom valve 11,13, unidirectional leather cup 14 and the rramming device 15 of strike-ofing.Wherein, upper and lower sand-filling cylinder 2,12 is upper and lower end and is respectively equipped with screw thread and bottom center and is provided with the cylinder of double as ball seat with circular hole.Upper and lower cutting seam sieve tube 1,6 is the pipe that uniform numerous longitudinal slots and upper and lower end are respectively equipped with screw thread on perisporium.Piston 8 is a hollow circular cylinder.Unidirectional leather cup 14 materials of strike-ofing are rubber, and hollow is the bowl-shape of back-off.Rramming device 15 is that a upper end is threaded, the short tube of lower end indentation.

Claims (1)

1, a kind of double sand holding bucket down-hole sand pumping device, by last, following cutting seam sieve tube (1), (6), on, lower sand-holiding tube (2), (12), pressure reduction valve (4), sealing bearing apparatus (5), communicating pipe (7), piston (8), on, following travelling valve (3), (9), the ring (10) of strike-ofing, on, following bottom valve (11), (13), the unidirectional leather cup of strike-ofing (14), rramming device (15) is formed, it is characterized in that: go up sand-filling cylinder (2) top and go up cutting seam sieve tube (1) to be threaded, the bottom has been hinged with travelling valve (3) successively with screw thread, pressure reduction valve (4), communicating pipe (7), piston (8), following travelling valve (9), the ring (10) of strike-ofing; Sealing bearing apparatus (5) is sleeved on communicating pipe outside (7), the two is for flexibly connecting, its down with screw thread be hinged with down cutting seam sieve tube (6) successively, gone up bottom valve (11), lower sand-holiding tube (12), bottom valve (13) and rramming device (15) down, an individual side is pressed with the unidirectional leather cup of strike-ofing (14) with pressure ring outside lower sand-holiding tube (12) bottom.

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