Device for lifting fluid submersible pump in the well casing string

 

(57) Abstract:

The invention relates to the field of well operation and can be used to provide pumping of fluid pumped by submersible pump in the well casing string. The device includes a housing 1 with the upper and lower protrusions 2, 3, respectively, and with a by-pass channel 4 and freely mounted between the projections of the clutch housing. The clutch is made of a composite and includes rigidly interconnected by upper and lower cylindrical conical sections 6, 7. The coupling has a mechanical seal 8 relative to the upper ledge 2. The clutch is also enshrined elastic cuff 11. Anchor-retaining device, the device contains at least three clips 12 with gear unilateral cuts, which are evenly placed through slot connection 13 on the lower conical section 7 of the coupling. Between the bottom ledge 3 and clutch installed spacers in the form of a pipe 14 with the vertical slots 15, at its upper end, is placed a washer 16, which supports the spring 17, and its upper portion is located in the bore 18. The course of the spring 17 allows you to interact with the washer 16 with the lower end of the conical section 7 of the coupling. Anchor-retaining item is inami 20. The latter are placed in the slots 15 and the grooves 21. The timing slips 12 pivotally connected by rods 22 with the ring 19. In case of a short trial run of the pump 25, the liquid enters the area above the cuff 11, and under the action of the last weight of the liquid column sleeve 11 together with the clutch against the force of springs 17 are moved down in the course of braking. Slips 12 moving along the grooves 13, his teeth interlock with the walls of the casing 23, providing a secure locking device. The invention allows to extend the scope and improve the operational reliability and to simplify operation. 2 C.p. f-crystals, 1 Il.

The invention relates to the field of well operation and can be used to provide pumping of fluid pumped by submersible pump in the well casing string, for example, when pipeless operation of water wells and underground leaching, as well as in other similar cases.

A device for lifting fluid submersible pump in the well casing string, containing a hollow cylindrical body with upper and lower ledges, freely mounted between the projections of the housing compound coupling with the top of the bone, and the locking device, including the timing slips ( EN 2068074 C1).

The disadvantages of the known device are as follows:

- inability to use packer for pipeless well operation, as it only works with the column tubing (tubing);

- low reliability of the packer due to the presence in the unit shear pins;

probably just a one-time use of the packer, as the replacement of shear pins and check valve.

The aim of the present invention is to extend the scope of application by providing a lifting fluid without the use of pumping pipes, as well as improving the reliability and simplified operation.

This objective is achieved in that the device for lifting fluid submersible pump in the well casing string, containing a hollow cylindrical body with upper and lower ledges, freely mounted between the projections of the housing compound coupling with the upper cylinder and the lower conical sections, elastic cuff, decompresses the pressure of the injected fluid, and the retaining device, including the timing slips, porneuo, mounted on the upper end of the washer and the ring is rigidly mounted on the inner surfaces of the plate springs, the cylindrical body is made the bypass channels, the upper cylindrical section of the coupling radial slots, toothed slips through slotted connections mounted on the tapered section of the sleeve and pivotally connected rods with ring, nozzle washer is spring-loaded relative to the clutch, a cylindrical casing grooves, and the pipe is vertical slots for placement of the plate spring, and the washer has the ability to interact with the bottom end of the coupling, and the latter is fixed against rotation relative to the cylindrical body and has an end seal relative to the upper ledge of the frame, a flexible cuff attached to the coupling, and the upper and lower cylindrical conical sections of the latter are rigidly interconnected.

When this anchor-retaining device includes at least three gear slips, and each of the interlocking connection of the conical section of the clutch gear slipcase made in the form of "dovetail" with teeth clipshow have unilateral cuts.

In addition, we Conducted tests of a prototype design of the claimed device has shown its high operational reliability and industrial applicability.

The invention is illustrated by the drawing, which shows a General view of the device.

The device comprises a hollow cylindrical housing 1 with the upper 2 and lower 3 ribs and with a by-pass channel 4 on its outer surface for flow of fluid, freely mounted between the projections of the clutch housing, which is made of a composite and includes rigidly interconnected by bolts 5 of the upper cylinder 6 and the bottom 7 conical sections. The coupling has a mechanical seal 8 relative to the upper ledge 2 of the housing 1 and fixed pin 9 located in one of the channels 4, which prevents its rotation relative to the housing 1. On the top of the cylindrical section 6 of the clutch is made of radial slots 10 to drain the fluid. The clutch is also enshrined elastic cuff 11, decompresses the pressure of the pumped fluid. Anchor-retaining device, the device contains at least three clips 12 with gear unilateral cuts, which are evenly placed through slot connection 13, each of which is made in the form of a "dovetail" on the bottom of the conical section 7 of the coupling. Between the bottom ledge 3 of the housing 1 and the clutch is installed spacers in the form of a pipe 14 with the vertical parhna the site is located in the bore 18, performed on the inner surface of the lower conical section 7 of the coupling. The course of the spring 17 allows you to interact with the washer 16 with the lower end of the conical section 7 of the coupling. Anchor-retaining device also includes a ring 19 is rigidly mounted on the inner surfaces of the plate springs 20. The latter are placed in the slots 15 of the socket 14 and the grooves 21, are made on the housing 1. The timing slips 12 pivotally connected by rods 22 with the ring 19. The plate springs 20 provide slipcam 12 installed position in the slots 21 on the descent, the locking and lifting device in the casing 23 of the borehole, i.e., in the required diametral dimension, excluding spontaneous locking device when running or climbing on the casing 23 of the well. The cable 24 from the pump 25 passes through the seal 26, the inner cavity of the housing 1 and the window 27. In the upper part of the housing 1 has a pin 28 for engagement, descent and detach the device from tripping, lifting tool, for example, rods or pipes. The presence of the check valve 29 in the pump 25 in combination with the sleeve 11, the end seal 8 and the seal 26 of the cable 24 eliminates arbitrary discharge of the liquid column of the discharge is the rise of the device, connected to the pump 25, the well is produced through trip tool and vacated capture, which should be connected to pin 28.

During the descent device of the column 23, the liquid flows freely through the pump 25, the check valve 29 and the inner cavity of the housing 1. Elastic cuff 11 and the clutch is preloaded by a spring 17 in its upper position until it stops at the top of the ledge 2 of the housing 1. The timing slips 12 are located at the bottom of the conical section 7 of the coupling, is limited to the loss of rods 22 and locked in this position, the plate springs 20.

After the descent device with a pump to a predetermined depth is short trial run of the pump 25 in the operation for locking the device in the column 23. When this fluid from the pump 25 through the internal cavity of the body 1 enters the area above the cuff 11, and under the action of the last weight of the liquid column sleeve 11 together with the clutch against the force of springs 17 and the friction force of the cuff 11 to column 23 and clipshow 12 in the grooves 13 are moved down in the course of braking. Thus slips 12 moving along the grooves 13, his teeth interlock with the walls of the casing 23, and efforts plate ol the about section 7 of the clutch when the last move down and thus is a reliable locking of the device in the casing 23. To prevent the flow of fluid through the channels 4 after locking the housing 1 is lowered a little tool before landing his upper lip 2 on the end seal 8. The stability of the liquid level in the column 23 by disabling the pump 25 and the transfer of weight of the liquid, together with the weight of submersible equipment, pump 25 and the whole device on the timing slips 12 ensures reliable operation of the device.

Then in a known manner tool is released and the gripper from the connection with the pin 28 and made them climb out of the well. After tying the mouth of the well and connecting the current-carrying cable to the automatic station control motor 25 is switched on for continuous operation.

For lifting the unit with electric pump 25 is necessary to reverse the descent to make the descent of the tool with a gripping device and connect them with the pin 28, then the tool is tension to bypass fluid from the injection zone wells in the zone of absorption. Draining occurs through the bypass channels 4 of the housing 1 and the radial slots 10 to static level. Then more tension tool needed PfP pipe 14 through the washer 16 compresses the spring 17, washer 16 abuts against the lower end of the coupling, which enables you to move the latter up and slips 12 held by rods 22 and plate springs 20 are moved along the slots 13 "dovetail" in the lower part of the conical section 7 of the coupling, thus leaving out of engagement with the wall of the column 23, ie rasshifrovka device. With the further rise timing slips 12 are located in the outer envelope of the conical section 7 of the coupling, which eliminates arbitrary stopping. Fluid is able to exit from a static level to flow through the channels 4 of the housing 1 and the slots 10 in the hole, bypassing the pump 25. Further, when the rise of the conical section 7 of the clutch is pressed by spring 17 to rest on the ledge 2 of the housing 1, blocking the channels 4 and the slots 10, and the system returns to its original position.

In the event of a significant accidental release of sand during operation nagakura area may be released from the sand in a known manner flushing.

Tested design of the claimed device showed (according to the results of checks on reliability and durability of an experimental batch) high technical and economic efficiency in the exploitation and industrial applicability.

2. The device under item 1, characterized in that the sample-retaining device includes at least three gear slips, and each of the interlocking connection of the conical section of the clutch gear slipcase made in the dovetail, and the teeth clipshow have unilateral cuts.

3. The device under item 1, characterized in that on the inner surface of the lower conical section of the clutch made the counterbore for the spring.

 

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FIELD: underground well repair, particularly equipment for sealing or packing boreholes or wells, namely devices for annulus separation during bottomhole zone waterproofing, hydraulic reservoir fracturing and other operations to be executed in well.

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7 dwg

FIELD: oil and gas production.

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Packer // 2459928

FIELD: oil and gas production.

SUBSTANCE: packer includes hollow shaft, sealing elements with stops mounted on the shaft, anchor unit that consists of casing with cone with slots and plates installed in them, connected to hydraulic cylinder piston via rods, the cavity of the cylinder is connected to the cavity of the shaft through radial channel and extension-type connection pipe mounted at the lower end of hollow plunger. Note that the piston is spring-loaded downwards in relation to the cylinder - to transport position and the rods are assembled consisting of upper, pin-connected to the plates, and lower, spherically-connected to the piston, parts that are interconnected via threaded connection adjusting the rod length. Sealing elements on outer surface contacting the stops can be equipped with facets, the quantity of sealing elements can exceed two and additional intermediate stops can be arranged between them, under the sealing elements there can be installed a driving washer rigidly connected to the corresponding intermediate support.

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FIELD: oil and gas industry.

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SUBSTANCE: invention relates to devices for fixing a tubing string in a casing string and eliminating the undulatory bending of the tubing string during the production of a reservoir fluid by downhole rod pumping units. The anchor consists of a housing, a cone, dies mounted on the cone by means of a dovetail, a casing, shear pins. On the cone along the dovetail, grooves are made, in which rollers installed in a cage are movable arranged, the dies resting on the rollers with their base. The cone is fixed against movement relative to the housing by means of a collet or a spring split ring. The collet or the spring split ring with its lower end rests against a ring mounted on the shoulder of the lower housing, and with its conical projection - into the stop ring mounted on the inner shoulder of the cone.

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