阅读说明：本技术 多油层中单独对一层挤压充填管柱 (Independent -layer extrusion filling pipe column in multiple oil layers ) 是由 杜勇 侯洪涛 宾永锋 田波 姜涛 贾庆乐 赵刚 于 2018-07-19 设计创作，主要内容包括：本发明公开了多油层中单独对一层挤压充填管柱,包括丢手内工具、充填工具、滤砂管,还包括冲管、密封插头、可捞脱砂皮碗,所述充填工具套在丢手内工具外部,并且充填工具上端通过自身内壁开设的左旋扣与丢手内工具外壁丝扣式连接,所述丢手内工具、充填工具同时开设径向贯通的充填孔,所述丢手内工具内壁设置球座,球座位于充填孔上方,丢手内工具内腔底部为封堵状态,所述丢手内工具下端连接冲管,冲管下端连接密封插头,所述充填工具下端连接滤砂管,滤砂管下端连接可捞脱砂皮碗。对其中一层单独挤压充填防砂,不影响其它层生产,以提高产量,保护生产层,提高采收率。(The invention discloses a separate-extrusion filling pipe column for layers in multiple oil layers, which comprises a releasing inner tool, a filling tool, a sand filter pipe, a washing pipe, a sealing plug and a fishable sand-removing leather cup, wherein the filling tool is sleeved outside the releasing inner tool, the upper end of the filling tool is in thread-locking connection with the outer wall of the releasing inner tool through a left turn-buckle arranged on the inner wall of the filling tool, the releasing inner tool and the filling tool are simultaneously provided with filling holes which are radially communicated, the inner wall of the releasing inner tool is provided with a ball seat positioned above the filling holes, the bottom of an inner cavity of the releasing inner tool is in a blocking state, the lower end of the releasing inner tool is connected with the washing pipe, the lower end of the washing pipe is connected with the sealing plug, the lower end of the filling tool is connected with the sand filter pipe, and the lower end of the sand filter pipe is connected with the fishable sand-removing leather cup.)

1. The -layer extrusion filling pipe column comprises a releasing inner tool, a filling tool and a sand filtering pipe and is characterized by further comprising a flushing pipe, a sealing plug and a fishable sand-removing leather cup, wherein the filling tool is sleeved outside the releasing inner tool, the upper end of the filling tool is connected with the outer wall of the releasing inner tool in a thread-locked mode through a left turn buckle arranged on the inner wall of the filling tool, the releasing inner tool and the filling tool are simultaneously provided with filling holes which are radially communicated, the inner wall of the releasing inner tool is provided with a ball seat positioned above the filling holes, the bottom of an inner cavity of the releasing inner tool is in a plugging state, the lower end of the releasing inner tool is connected with the flushing pipe, the lower end of the flushing pipe is connected with the sealing plug, the lower end of the filling tool is connected with the sand filtering pipe, the lower end of the sand filtering pipe is connected with the fishable sand-removing leather cup, an annular space is formed between the sand filtering pipe and the flushing pipe.

2. The -layer individual extrusion filling string for the multilayer of claim 1, wherein the fishable sand-removing cup comprises a central tube, a cup, a sliding sleeve and a cup cap, the cup is fixed on the sliding sleeve by the cup cap and forms a whole, and the whole is connected to the outside of the central tube through a left-handed thread fastener arranged on the sliding sleeve.

3. The layer individual squeeze pack string for the multi-zone of claim 2, wherein the base pipe is perforated with radially through-going sand leaks.

4. The -layer extrusion filling string for the multi-layer according to claim 2, wherein the inner wall of the central tube forms a sealing pair with the outer wall of the sealing plug, and the outer wall of the central tube forms a sealing pair with the inner wall of the sliding sleeve.

5. The -layer extrusion filling pipe column in the multi-oil layer according to claim 2, wherein the upper end of the central pipe is connected with the sand filter pipe through a left-handed thread type coupling arranged on the inner wall of the central pipe, and the outer wall of the lower end of the central pipe is provided with a baffle ring.

6. The separate layer squeeze pack string of any of claims 1 to 5 to wherein the ball seat is fixed to the inner wall of the inner tool by shear pins.

7. The multiple oil reservoir separate squeezing filling pipe string of any of claim 1 to 5, wherein the filling tool comprises a filling pipe and an anchoring packer, the anchoring packer is installed on the outer wall of the filling pipe, the filling pipe is provided with a radial hole, the upper end of the filling pipe is connected with the outer wall of the releasing inner tool, and the lower end of the filling pipe is connected with the sand screen.

Technical Field

The present invention relates to a downhole operation string for petroleum production, particularly to a single -layer extrusion filling string in a multi-oil layer.

Background

After the oil well is drilled, the well body track passes through a plurality of layers, wherein a plurality of oil layers exist, the lower oil layer is firstly mined in a mining mode , the upper oil layer is mined layer by layer and returns upwards, the upper oil layer is mined, or the lower oil layer is mined in the horizontal well and returns upwards step by step after being mined, the upper oil layer is mined, however, after sections of oil layers are mined, the yield is reduced, the economic benefit is poor, residual oil is still not mined, the upper oil layer is jetted and fractured and sand-proof modified, the upper oil layer is constructed in a closed high-pressure mode in the construction process, the high pressure cannot be transmitted to the lower oil layer and cannot affect the lower oil layer, the upper oil layer and the lower oil layer are communicated and produced simultaneously after the construction, and the development of a high-pressure extrusion filling pipe column for layers in oil.

200420039446.7, published 2005-03-30 discloses kinds of non-casing extrusion filling sand control pipe columns, which comprise a wire-wound screen pipe, a signaler, a releasing device, a suspension packer, a post-processing device, a hydraulic cylinder locking device, a filling sealing device, an extrusion-flushing conversion assembly and a sand supporting leather cup, wherein the post-processing device comprises an outer deblocking pipe, a deblocking pin, an inner deblocking pipe, an upper cone and a deblocking claw, and is connected with the suspension packer.

201420085711.9, published 2014-10-22 provides kinds of integration extrusion sand control filling device, including extrusion sand control filling instrument II and at least group lie in extrusion sand control filling instrument I of II tops, extrusion sand control filling instrument II passes through oil pipe with extrusion sand control filling instrument I and is connected, adjacent extrusion sand control filling instrument I passes through oil pipe and connects, and the upper end that lies in the extrusion sand control filling instrument I of top is connected with hydraulic packer through oil pipe.

Most of the retrieved pipe columns are layered extrusion filling pipe columns, but the pipe columns cannot be applied to independent layers in multiple oil layers, the technical field is different, more importantly, the adopted specific technical scheme is different, and the function of the connection relation of components is realized, and other technical inspiration is not provided.

Disclosure of Invention

The invention aims to provide an layers of extrusion filling pipe column in a plurality of oil layers, the pipe column is put into an upper layer of oil layer, the pipe column is constructed under closed high pressure, after the construction, an inner releasing pipe column is put out, the upper oil layer and the lower oil layer are communicated, and the pipe column is used for producing simultaneously, is used for simultaneously exploiting a plurality of oil layers, and is used for carrying out extrusion filling sand control on layers of the pipe column independently without influencing the production of other layers, so that the yield is improved, the production layer is protected, and the recovery ratio is improved.

In order to achieve the purpose, the invention adopts the following technical scheme that layers of oil layers are separately extruded and filled with a tubular column, the tubular column comprises a releasing inner tool, a filling tool and a sand filter pipe, and further comprises a washing pipe, a sealing plug and a fishable sand-removing leather cup, the filling tool is sleeved outside the releasing inner tool, the upper end of the filling tool is in threaded connection with the outer wall of the releasing inner tool through a left turn buckle arranged on the inner wall of the filling tool, the releasing inner tool and the filling tool are simultaneously provided with filling holes which are radially communicated, the inner wall of the releasing inner tool is provided with a ball seat, the ball seat is positioned above the filling holes, the bottom of an inner cavity of the releasing inner tool is in a plugging state, the lower end of the releasing inner tool is connected with the washing pipe, the lower end of the washing pipe is connected with the sealing plug, the lower end of the filling tool is connected with the sand filter pipe, the lower end of the sand filter pipe is connected with the fishable sand-removing leather cup, an.

The fishable sand-removing leather cup comprises a central tube, a leather cup, a sliding sleeve and a leather cup cap, wherein the leather cup is fixed on the sliding sleeve by the leather cup cap to form whole, and the whole is connected outside the central tube through a left-handed thread buckle arranged on the sliding sleeve.

The central tube is provided with a radially through sand leakage hole.

The inner wall of the central pipe and the outer wall of the sealing plug form a sealing pair, and the outer wall of the central pipe and the inner wall of the sliding sleeve form a sealing pair.

The upper end of the central tube is connected with the sand filtering tube through a left-handed thread type coupling arranged on the inner wall of the central tube, and a baffle ring is arranged on the outer wall of the lower end of the central tube.

The ball seat is fixed on the inner wall of the tool in the releasing tool through shear pins.

The filling tool comprises a filling pipe and an anchoring packer, wherein the anchoring packer is installed on the outer wall of the filling pipe, the filling pipe is provided with a radial hole, the upper end of the filling pipe is connected with the outer wall of the releasing inner tool, and the lower end of the filling pipe is connected with the sand filtering pipe.

Compared with the prior art, the invention has the following beneficial effects:

the method comprises the steps of connecting a salvaging sand supporting leather cup with a sand filter pipe from bottom to top, squatting at a well mouth, connecting a sealing plug with a flushing pipe, connecting the upper part of the flushing pipe with the lower part of a tool in a release, connecting a lower buckle of a filling tool with the sand filter pipe, lowering the salvaging sand supporting leather cup and the sand filter pipe into an upper oil layer position in a well by using an oil pipe, throwing balls onto a ball seat of the tool in the release to block a channel, building pressure by using a pump truck, setting the filling tool, firmly clamping the set filling tool on a sleeve, sealing an oil sleeve annulus, simultaneously punching the ball seat, dropping the ball seat into a lower inner cavity of the tool in the release, opening the filling opening, carrying quartz sand by using a sand carrying liquid, entering an oil layer outside the sand filter pipe through the tool in the release and the filling opening, sealing the oil layer in the oil pipe by using the salvaging sand supporting leather cup and the sealing plug, sealing the pressure in the oil pipe and the lower oil layer, sealing the oil layer, sealing plug with the flushing pipe can be produced simultaneously.

According to the invention, the extrusion filling pipe column is put into the upper oil layer, the extrusion filling sand prevention is independently carried out on the upper layer, the production of the lower layer is not influenced, after the construction is finished, the inner releasing pipe column is put out, the upper oil layer and the lower oil layer are communicated, the simultaneous exploitation of multiple oil layers is realized, the operation cost is reduced, and the requirement of the extracting solution is met.

Drawings

Fig. 1 is a cross-sectional view of a single squeeze-packed column for multiple reservoirs in accordance with the present invention.

In the figure: the inner releasing tool 1, the left turn buckle 2, the filling tool 3, the ball seat 4, the filling hole 5, the washing pipe 6, the sand filtering pipe 7, the sealing plug 8, the sand salvaging and removing leather cup 9, the central pipe 10, the leather cup 11, the sliding sleeve 12, the leather cup cap 13, the sand leaking hole 14 and the baffle ring 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of of the present invention, rather than all embodiments.

Referring to fig. 1, the invention provides technical schemes that a layers of multiple oil layers are extruded and filled with a string independently, the string comprises a releasing inner tool 1, a filling tool 3 and a sand filtering pipe 7, the filling tool comprises a filling pipe and an anchoring packer, the anchoring packer is installed on the outer wall of the filling pipe, the filling pipe is provided with a radial hole, the upper end of the filling pipe is connected with the outer wall of the releasing inner tool, the lower end of the filling pipe is connected with the sand filtering pipe, the releasing inner tool and the filling tool are simultaneously provided with filling holes 5 which are radially communicated, the inner wall of the releasing inner tool is provided with a sealing plug 8, a ball seat is positioned above the filling hole, the bottom of an inner cavity of the releasing inner tool is in a plugging state, the lower end of the releasing inner tool is connected with the filling pipe 6, the lower end of the filling pipe is connected with the sealing plug 8, the lower end of the filling tool is connected with the sand filtering pipe 7, the lower end of the sand filtering pipe is connected with the sand filtering pipe, and the sand filtering plug is sleeved on the inner wall of the sand filtering pipe, and the sand filtering pipe is sleeved with the sand filtering plug, and the sand filtering pipe.

The fishable sand-removing leather cup comprises a central tube 10, a leather cup 11, a sliding sleeve 12 and a leather cup cap 13, wherein the leather cup is fixed on the sliding sleeve by the leather cup cap to form whole, and the whole is connected outside the central tube through a left-handed thread button arranged on the sliding sleeve.

The central tube is provided with a radially through sand leakage hole 14.

The inner wall of the central pipe and the outer wall of the sealing plug form a sealing pair, and the outer wall of the central pipe and the inner wall of the sliding sleeve form a sealing pair.

The upper end of the central tube is connected with the sand filtering tube through a left-handed thread type coupling arranged on the inner wall of the central tube, and the outer wall of the lower end of the central tube is provided with a baffle ring 15.

The inner tool 1 of the releasing hand is positioned in the inner cavity of the filling tool 3 and is connected with the filling tool 3 through a left turn buckle 2, the lower part of the inner tool 1 of the releasing hand is in threaded connection with a washing pipe 6 and a sealing plug 8, a ball seat 4 is arranged in the inner tool 13 of the releasing hand, the lower part of the filling tool 3 is in threaded connection with a sand filtering pipe 7, the lower part of the sand filtering pipe 7 is in threaded connection with a fishable sand supporting leather cup 9, the fishable sand supporting leather cup 9 comprises a central pipe 10, a leather cup 11, a sliding sleeve 12, a leather cup cap 13, a retaining ring 15 and the like, wherein the leather cup 11 is fixed on the sliding sleeve 12 through the leather cup cap 13 to form whole, the whole is fixed on the central pipe 10 through the left turn buckle, and the left turn buckles 16.

When the invention is used on site, the operation is carried out according to the following operation procedures:

the method comprises the steps of connecting a fishable sand supporting leather cup 9 with a sand filter pipe 7 from bottom to top, squatting at a well head, connecting a sealing plug 8 with a flushing pipe 6, connecting the upper part of the flushing pipe 6 to the lower part of a releasing inner tool 1, connecting a lower buckle of a filling tool 3 with the sand filter pipe 7, lowering the sealing plug 8 and the flushing pipe 6 into an upper oil layer position in a well by using an oil pipe, throwing balls onto a ball seat 4 of the releasing inner tool 1 to block a channel, carrying out pressure by using a pump truck, setting an anchoring packer of the filling tool 3, setting the anchoring packer of the filling tool 3 by using the pressure of the pump truck, and repeating the steps of firmly clamping the filling tool 3 after setting on a sleeve to fix the sleeve, sealing an oil sleeve annulus, simultaneously driving the ball seat 4 off the oil pipe, dropping the ball seat 4 into a lower inner cavity of the releasing inner tool, driving a filling port 5 to open a filling port, carrying quartz sand by using a sand liquid, entering an oil layer 7 into the oil layer through the releasing inner tool 1, fishing rubber cup 8, fishing the rubber cup and the left-rotating plug, pulling the left-side sand supporting leather cup out of the plug, pulling out the left-side sand filter pipe, pulling out the left-side sand-out the sand-side sand-pulling-out plug 7, pulling-out the left-side sand-pulling-out plug 7, pulling-out the sand-sand.

In the description of the present invention, it is to be understood that the positional indications or positional relationships are based on those shown in the drawings and are for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.