CN219158933U - Circulation sand washing instrument of change flow way - Google Patents

Abstract

The utility model discloses a variable flow channel circulating sand washing tool, which belongs to the field of oilfield exploitation equipment, and comprises a sleeve, wherein one end of the sleeve is detachably connected with a central shaft of a centralizer, one end of the central shaft of the centralizer is fixedly provided with an upper joint of the centralizer, and the periphery of the sleeve is provided with a sealing module which can realize positive and negative circulation and is provided with a return channel, so that the return effect is more obvious, the return speed is faster, the discharge capacity of a ground pump is low, the sand return effect is obvious and the sand prevention expected effect can be achieved under the condition of insufficient ground power better solved, meanwhile, the condition that a stratum is lost is better solved and the stratum is not damaged is better protected, and under the cooperation of the centralizing module, the tool is always in a centralized state, the sealing of a leather cup is always in an optimal state, and the sealing device is strong in adaptability and is particularly suitable for sand washing and blocking removal of a horizontal section.

Description

Circulation sand washing instrument of change flow way

Technical Field

The utility model relates to the field of oilfield exploitation equipment, in particular to a variable flow channel circulation sand washing tool.

Background

The horizontal well has the characteristics of high efficiency and high yield, so the horizontal well is widely popularized and applied in various large oil fields, and along with the exploitation and utilization of the horizontal well, the sand produced by the stratum can be piled up in the horizontal section to form a plurality of sand bridges due to the structural characteristics of the horizontal well, so that the porosity of an oil layer is reduced, and the recovery efficiency is affected. The serious problem of sand production is an important factor affecting the exploitation of the horizontal well, and meanwhile, the sand washing of the horizontal well is cautious in actual production due to the high risk of sand washing of the horizontal well. Therefore, research on the horizontal well sand washing technology is carried out, and a reasonable sand washing mode is selected, so that the aim of improving the production efficiency and the period of the horizontal well is particularly important.

Based on the above, the present inventors found that: the efficient exploitation mode of the horizontal well is widely applied to various large oil fields, but a series of problems such as sand production and the like begin to develop gradually along with the exploitation of the oil fields and the gradual increase of the oil extraction time of the horizontal well, the risk of sand flushing operation of the horizontal well is increased due to the particularity of the well track of the horizontal well, and meanwhile, the oil layer is polluted due to the fact that the ground displacement is insufficient, the sand prevention section has leakage and sand flushing liquid is easy to damage the oil layer, so that the oil layer is researched and improved aiming at the existing structure, and the purpose of more practical value is achieved.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems existing in the prior art, the utility model aims to provide a variable flow channel circulating sand washing tool which can realize positive and negative circulation and has a return channel, so that the return effect is more obvious, the return speed is higher, the discharge capacity of a ground pump is lower, the sand returning effect is obvious and the expected effect can be achieved under the condition of insufficient ground power, meanwhile, a sealing module is provided, the condition that a sand prevention section is lost and a stratum is protected from being damaged is better solved, the tool is always in an intermediate state under the cooperation of a righting module, the sealing of a leather cup is always in an optimal state, the adaptability is strong, and the tool is particularly suitable for sand washing and blocking removal of a horizontal section.

2. Technical proposal

In order to solve the problems, the utility model adopts the following technical scheme.

The utility model provides a change channel circulation sand washing instrument, includes the sleeve pipe, the one end of sleeve pipe can be dismantled and be connected with the centralizer center pin, the one end fixed mounting of centralizer center pin has the centralizer top connection, the sheathed tube periphery is provided with sealing module, the nipple joint under the telescopic other end can be dismantled and be connected with the centralizer center pin, sheathed tube inside is provided with connects the nipple joint, the one end of connecting the nipple joint extends to the inside of nipple joint under the centralizer center pin and is provided with the washing module, the periphery cover of washing module is equipped with the lower clutch, and the inboard of lower clutch is fixed with the peripheral block of nipple joint one end under the centralizer center pin, the periphery of nipple joint under centralizer center pin and the centralizer center pin all is provided with the righting module.

Further, the sealing module comprises a first leather cup and a second leather cup which are fixedly arranged outside the sleeve, and the first leather cup and the second leather cup are distributed in parallel from left to right.

Further, the flushing module comprises a flushing head which is connected with one end of the short joint in a clamping mode, and a nozzle is fixedly arranged at one end of the flushing head.

Further, a plurality of water flow holes are formed in the periphery of the nozzle.

Further, the centering module comprises an upper arched sheet seat and a lower arched sheet seat which are fixed on the center shaft of the centering device and the periphery of the lower short section of the center shaft of the centering device, an arched sheet is fixedly connected between the upper arched sheet seat and the lower arched sheet seat, and a lantern ring and a pressing ring are respectively and fixedly connected on the peripheries of the upper arched sheet seat and the lower arched sheet seat.

Further, a return channel is formed in the periphery of the connecting nipple.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

(1) According to the scheme, the device can realize positive and negative circulation and has the return channel, so that the return effect is more obvious, the return speed is faster, the device is suitable for low discharge capacity of a ground pump, and the device can better solve the problem that the sand return effect is obvious and achieves the expected effect under the condition of insufficient ground power.

(2) According to the scheme, through the self-contained sealing module, the problem that the sand prevention section has leakage is better solved, the stratum is protected from being damaged, the tool is always in an intermediate state under the cooperation of the centralizing module, the sealing of the leather cup is always kept in an optimal state, the adaptability is high, and the sand prevention device is particularly suitable for sand washing and blockage removal of the horizontal section.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present utility model;

fig. 4 is an enlarged view of the B position in fig. 2 according to the present utility model.

The reference numerals in the figures illustrate:

1. a sleeve;

2. a centralizer center shaft;

3. a centralizer upper joint;

4. a sealing module; 41. a first leather cup; 42. a second leather cup;

5. a central shaft lower nipple of the centralizer;

6. a connecting nipple; 61. a return channel;

7. a flushing module; 71. a flushing head; 72. a nozzle;

8. a lower joint;

9. a righting module; 91. an upper arcuate sheet seat; 92. a lower arcuate sheet seat; 93. an arcuate segment; 94. a collar; 95. and a compression ring.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.

Examples:

referring to fig. 1-4, a circulating sand washing tool for a variable flow channel comprises a casing 1, wherein one end of the casing 1 is detachably connected with a central centralizer shaft 2, one end of the central centralizer shaft 2 is fixedly provided with an upper centralizer joint 3, the periphery of the casing 1 is provided with a sealing module 4, the other end of the casing 1 is detachably connected with a lower centralizer shaft nipple 5, the inside of the casing 1 is provided with a connecting nipple 6, one end of the connecting nipple 6 extends to the inside of the lower centralizer shaft nipple 5 and is provided with a flushing module 7, the periphery of the flushing module 7 is sleeved with a lower joint 8, the inner side of the lower joint 8 is clamped and fixed with the periphery of one end of the lower nipple 5 under the central centralizer shaft, the central centralizer shaft 2 and the periphery of the lower centralizer shaft nipple 5 are respectively provided with a centralizing module 9, and when in use, through the cooperation of the casing 1, the central centralizer shaft 2, the connecting nipple 6 and the central centralizer shaft nipple 5, the passage conversion of well flushing fluid can be achieved, and the sand entering/guaranteeing inside of the upper sand returning pipe nipple is guaranteed, and the well completion fluid flowing channel inside the well completion pipe is effectively returned to the ground.

Referring to fig. 2, the sealing module 4 includes a first cup 41 and a second cup 42 fixedly installed outside the casing 1, the first cup 41 and the second cup 42 are distributed from left to right in parallel, and when in use, the tool can be sealed through the arrangement of the first cup 41 and the second cup 42, so that the well washing liquid directly enters the tool to complete the flow passage conversion.

Referring to fig. 2 and 3, the flushing module 7 includes a flushing head 71 clamped at one end of the connection nipple 6, and a nozzle 72 is fixedly mounted at one end of the flushing head 71, and when in use, the inner wall of the lateral pipe column can be flushed by using the nozzle 72 under the action of high-pressure flushing fluid.

Referring to fig. 4, the nozzle 72 is provided at its periphery with a plurality of water flow holes. When in use, the water flow holes comprise radial water flow holes and lower water flow holes, and the side wall and lower impurities of the pipe column are respectively washed, so that the washing is more sufficient, and the cleaning capacity is stronger.

Referring to fig. 3, the centering module 9 includes an upper arcuate piece seat 91 and a lower arcuate piece seat 92 fixed on the outer circumferences of the centering device central shaft 2 and the centering device central shaft lower short piece 5, an arcuate piece 93 fixedly connected between the upper arcuate piece seat 91 and the lower arcuate piece seat 92, a collar 94 and a compression ring 95 respectively fixedly connected on the outer circumferences of the upper arcuate piece seat 91 and the lower arcuate piece seat 92, and a return channel 61 is formed on the outer circumference of the connecting short piece 6, and when in use, the tool can be centered by utilizing the arcuate piece 93 and the like, and the gravity of the tool is completely added on the tool, so that the sealing effect of the sealing module 4 is prevented from being influenced by the dead weight of the tool.

When in use: the well flushing liquid is pumped in through the annular space, the flow passage of the well flushing liquid is changed through the connecting nipple 6 to enter the tool, the flushing head 71 at the bottom enters the annular space, the locally positive circulation upward return liquid is formed to enter the hydraulic steering sand flushing tool through the return hole of the lower joint 8 and then enter the hydraulic steering sand flushing tool through the return channel 61 on the connecting nipple 6 and return to the ground through an oil pipe or a drill pipe water hole, the flushing head 71 is arranged at the bottom, and a small-aperture water flow hole on the flushing head 71 can enable the well flushing liquid to be throttled and accelerated, and a well bottom flow field is made into turbulent flow, so that the efficient sand flushing and blocking removal are achieved. The well flushing liquid is throttled and accelerated through the small-aperture water flow holes, the injection speed is greatly increased, the upward return speed of the liquid is greatly higher than the sand sedimentation speed, and the upward return passage of the speed pipe column as sand carrying liquid is more beneficial to upward return of stratum impurities to the ground than the annulus.

The above description is only of the preferred embodiments of the present utility model; the scope of the utility model is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present utility model, and the technical solution and the improvement thereof are all covered by the protection scope of the present utility model.

Claims (6)

1. The utility model provides a change channel circulation sand washing instrument, includes sleeve pipe (1), its characterized in that: the utility model discloses a pipe joint, including casing (1) and nipple joint (5), right center pin (2) are connected with in the dismantling of one end of casing (1), right center pin (2)'s one end fixed mounting has right up joint (3), the periphery of casing (1) is provided with sealing module (4), the other end of casing (1) can be dismantled and be connected with right center pin and go down nipple joint (5), the inside of casing (1) is provided with and connects nipple joint (6), the one end of connecting nipple joint (6) extends to right center pin and goes down nipple joint (5) inside and be provided with flushing module (7), the periphery cover of flushing module (7) is equipped with lower joint (8), and the inboard of lower joint (8) is fixed with right center pin lower nipple joint (5) one end periphery block, right center pin (2) and right center pin lower nipple joint (5) periphery all are provided with right module (9).

2. A variable flow path circulation sand washing tool as claimed in claim 1, wherein: the sealing module (4) comprises a first leather cup (41) and a second leather cup (42) which are fixedly arranged outside the sleeve (1), and the first leather cup (41) and the second leather cup (42) are distributed in parallel from left to right.

3. A variable flow path circulation sand washing tool as claimed in claim 1, wherein: the flushing module (7) comprises a flushing head (71) which is connected with one end of the short joint (6) in a clamping mode, and a nozzle (72) is fixedly arranged at one end of the flushing head (71).

4. A variable flow path circulation sand washing tool as claimed in claim 3, wherein: the periphery of the nozzle (72) is provided with a plurality of water flow holes.

5. A variable flow path circulation sand washing tool as claimed in claim 1, wherein: the centering module (9) comprises an upper arched sheet seat (91) and a lower arched sheet seat (92) which are fixed on the peripheries of the centering device central shaft (2) and the centering device central shaft lower short section (5), an arched sheet (93) is fixedly connected between the upper arched sheet seat (91) and the lower arched sheet seat (92), and a lantern ring (94) and a pressing ring (95) are respectively and fixedly connected on the peripheries of the upper arched sheet seat (91) and the lower arched sheet seat (92).

6. A variable flow path circulation sand washing tool as claimed in claim 1, wherein: and a return channel (61) is formed in the periphery of the connecting nipple (6).

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