CN103388469B - filling tool - Google Patents

Abstract

A kind of packing tool, top connection and back-off sub, fluid cylinder connects, between fluid cylinder and back-off sub, piston is installed, back-off sub is connected with outer tube, in piston, fishing joint is installed, fishing joint seat is on outer tube, piston is connected in fishing joint by setting pin, being connected with lock ring seat pipe of piston, unidirectional lock ring is installed in lock ring seat pipe inside, fishing joint is connected on outer tube by deblocking pin, the bottom of lock ring seat pipe is connected with cone, cone extracorporeal set packing element, anchor is suspended in cone, back-off sub is connected with interior pipe, sliding sleeve connects on inner pipe by pin, pitching seat is on sliding sleeve, interior pipe is set with outward closes cover, closing cover is connected on interior pipe by breaking pin, in UNICOM, pipe box is contained in and closes outside cover, snap ring is installed on the top closing cover, UNICOM's outer tube sleeve to be contained in UNICOM outside pipe, anchor, UNICOM's outer tube, sand screen joint connects successively, under interior pipe, ball cover is installed, the bottom of ball cover is connected with washing pipe joint, stifled ball is on washing pipe joint.

Description

filling tool

technical field

The invention is a downhole tool used for sand control in oilfield formations, and is a filling tool.

Background technique

There are two types of sand control in oil wells: chemical sand control and mechanical sand control. Filling the wellbore with special sand particles, and relying on this special sand particles to prevent sand in the oil layer from entering the well is a kind of mechanical sand control. This kind of mechanical sand control requires sand control filling tools. The existing sand control filling tools have unreasonable structure, low filling success rate, many operation procedures, long operation time and high cost. For example, in the patent No. 200420096658.9 sand control filling tool, the drop-off sub joint 5 and the suspension joint 6 are separated by hydraulic pressure. When the hydraulic pressure is unreliable, the drop-out sub joint 5 and the suspension joint 6 cannot be separated, and the tool cannot be lost, and the sand control work will fail. In the event of a major engineering accident, it is necessary to overhaul the oil well to remove it and then perform sand control again. This will increase the operating procedures and greatly increase the operating costs. The sand control time of the oil well will be prolonged, the oil production will decrease, and the economic benefits of the oil well will decline.

Contents of the invention

The purpose of the present invention is to design a filling tool, the well-staying part and the lifting part are separated by rotating the oil pipe, improving tool reliability, increasing the success rate of oil well sand control, reducing operating procedures, shortening operating time, and saving operating costs.

The purpose of the present invention is achieved in this way: including the upper joint, piston, liquid cylinder, hand-drop joint, salvage joint, seat seal pin, one-way lock ring, outer tube, inner tube, unsealing pin, lock ring seat tube, cone Body, rubber cartridge, anchoring assembly, Unicom outer tube, snap ring, pin, closing sleeve, pull-off pin, ball cover, blocking ball, filter sand pipe joint, flushing pipe joint, pitching ball, sliding sleeve, Unicom inner tube, The inner thread at the lower part of the upper joint is connected with the upper part of the hand-off joint, the outer thread at the lower part of the upper joint is connected with the upper part of the hydraulic cylinder, and a piston is installed between the liquid cylinder and the hand-away joint, and the piston is under the communication hole at the upper part of the hand-away joint. The left-handed external thread on the lower part of the drop-off joint is connected with the left-handed internal thread on the upper part of the outer pipe. A fishing joint is installed inside the piston. The fishing joint is seated on the outer pipe. The piston is connected to the fishing joint by a seat seal pin. The upper part of the tube is connected, and a one-way lock ring is installed inside the lock ring seat tube. The salvage joint is connected to the outer tube by an unsealing pin, and the lower part of the lock ring seat tube is connected to the cone. The upper part of the assembly, the anchor assembly is suspended on the cone, the lower internal thread of the drop joint is connected with the upper part of the inner pipe, there is a communication groove on the inner pipe, and the sliding sleeve covers the communication groove on the inner pipe from the inside of the inner pipe , the sliding sleeve is connected to the inner tube by a pin, the pitching seat is on the upper port of the sliding sleeve, the inner tube is covered with a closing sleeve, the closing sleeve is connected to the inner tube by a breaking pin, the Unicom inner tube is set outside the closing sleeve, closed The upper part of the sleeve is installed with a snap ring, and the Unicom outer tube is set outside the Unicom inner tube. The upper part of the ball cover is connected with the flushing pipe joint, the plugging ball seat is on the inner hole of the flushing pipe joint, the piston has a well flushing through hole, and there is an annular space between the outer pipe and the inner pipe, which connects the outer pipe with the Unicom There is a vertical flow channel between the inner pipes, and there is a through groove on the ball cover. The well washing through hole, the annulus, the vertical flow channel, and the through groove are connected. The outer pipe has a sand groove, and the communication groove on the inner pipe is closed by The Unicom groove on the sleeve and the Unicom inner pipe communicates with the sand passing groove on the Unicom outer pipe.

The beneficial effects of the present invention are: the hydraulic isolation casing, the hydraulic anchoring, the oil pipe rotating on the ground, the left-handed external thread at the lower part of the hand-off joint and the left-handed internal thread at the upper part of the outer pipe are disengaged. These three steps work reliably and can Ensure the success of oil well sand control, reduce operating procedures, shorten operating time, save operating costs, and improve the economic benefits of sand control wells.

Description of drawings

Accompanying drawing is the assembly drawing of the embodiment of the present invention.

Detailed ways

Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

As can be seen from the figure, the embodiment of the present invention includes an upper joint 1, a piston 2, a liquid cylinder 3, a hands-off joint 4, a fishing joint 6, a seat pin 7, a one-way lock ring 8, an outer pipe 9, an inner pipe 10, a Sealing pin 11, lock ring seat tube 12, cone 13, rubber tube 14, anchor assembly 15, Unicom outer tube 17, snap ring 18, pin 20, closing sleeve 21, breaking pin 22, ball cover 24, plug Ball 25, filter sand pipe joint 26, flushing pipe joint 27, pitching ball 28, diversion sleeve 29, sliding sleeve 31, Unicom inner pipe 32, the inner thread of the lower part of the upper joint 1 is connected with the upper part of the hand-off joint 4, and the upper joint 1 The external thread at the lower part is connected to the upper part of the liquid cylinder 3, and the piston 2 is installed between the liquid cylinder 3 and the hands-free joint 4. The upper part of the outer tube 9 is connected with a left-handed internal thread, and a salvage joint 6 is installed in the piston 2. The salvage joint 6 is seated on the outer tube 9. The piston 2 is connected to the salvage joint 6 by a seat pin 7. The lower part of the piston 2 is connected to the lock ring seat. The upper part of the tube 12 is connected, and the one-way lock ring 8 is installed inside the lock ring seat tube 12, and the salvage joint 6 is connected on the outer tube 9 by the unsealing pin 11, and the lower part of the lock ring seat tube 12 is connected with the cone 13, and the outside of the cone 13 Set the rubber sleeve 14, the rubber sleeve 14 is set on the upper part of the anchor assembly 15, the anchor assembly 15 is suspended on the cone 13, the lower internal thread of the drop joint 4 is connected with the upper part of the inner pipe 10, and the upper part of the inner pipe 10 There is a communication groove, the sliding sleeve 31 covers the communication groove on the inner tube 10 from the inside of the inner tube 10, the sliding sleeve 31 is connected on the inner tube 10 by the pin 20, the ball 28 is seated on the upper port of the sliding sleeve 31, and the inner tube 10 Outer set closing sleeve 21, closing sleeve 21 is connected on inner tube 10 by breaking pin 22, Unicom inner tube 32 is set outside closing sleeve 21, snap ring 18 is installed on the top of closing sleeve 21, Unicom outer tube 17 is sleeved in Unicom Outside the pipe 32, the upper part of the Unicom outer pipe 17 is connected with the lower part of the anchor assembly 15, the lower part of the Unicom outer pipe 17 is connected with the filter sand pipe joint 26, the lower part of the inner pipe 10 is connected with the upper part of the spherical cover 24, and the spherical cover 24 The bottom of the piston 2 is connected with the flushing pipe joint 27, and the blocking ball 25 is seated on the inner hole of the flushing pipe joint 27, and the blocking ball 25 is limited to move in the ball cover 24, and the well flushing through hole 5 is arranged on the piston 2, and the outer pipe 9 and the inner There is an annulus 16 between the tubes 10, a vertical flow channel 19 between the Unicom outer tube 17 and the Unicom inner tube 32, a through groove 23 on the ball cover 24, a well washing through hole 5, an annulus 16, and a vertical flow channel 19, the passage groove 23 communicates, and the Unicom outer pipe 17 has a sand groove 30, and the Unicom groove on the inner pipe 10 communicates with the sand groove 30 on the Unicom outer pipe 17 by closing the cover 21, the Unicom groove on the Unicom inner pipe 32. The diversion sleeve 29 is connected on the Unicom outer pipe 17, the bell mouth of the diversion sleeve 29 is downward, and the diversion sleeve 29 is located at the sand passage 30 on the Unicom outer pipe 17, so that the sand liquid flows out from the sand passage 30 to flow down to avoid damage to the casing.

The present invention is connected to the sand control pipe under the filling pipe string, the ball 28 is not put in when it is lowered, and the ball 28 is put in after it is lowered to the design position, and then pressed, and the hydraulic pressure enters the piston 2 from the communication hole on the upper part of the drop joint 4 The upper part of the seat seal pin 7 is cut off, the piston 2 goes down, the anchor assembly 15 is anchored on the sleeve, the cone 13 makes the rubber tube 14 expand outward to seal the sleeve, and the one-way lock ring 8 will anchor The state and sealing state are fixed. Continue to increase the pressure, the pin 20 is cut off, the sliding sleeve 31 descends, the sliding sleeve 31 no longer covers the communication groove on the inner pipe 10, the present invention can carry out sand-proof flushing, and the sand liquid is filled into the formation from the inner pipe 10 through the sand groove 30. After backwashing after filling, the well flushing fluid is poured into the casing through the well flushing through hole 5, the annular space 16, the vertical flow channel 19, the channel 23, and the inner pipe 10 and flows out upwards to realize circular well flushing. After the well flushing is completed, the tubing is rotated forward, and the connecting thread of the drop joint 4 and the outer pipe 9 is released, so that the well-staying part is separated from the lifting part, and the tubing is lifted up, and the inner pipe 10 drives the closing sleeve 21 to go up and is blocked, and then the pin 22 is broken is pulled off, the filling channel is closed, the snap ring 18 blocks the closing sleeve 21 and does not fall, and the proposed part can be fully proposed. When the next operation needs to fish out the part of the well, the fishing tool is lowered and the internal thread buckle on the upper part of the fishing joint 6 is lifted up, the unsealing pin 11 is pulled off, the anchor assembly 15 is unanchored, and the cone 13 is released from the rubber tube. If you withdraw within 14 days, all the remaining parts can be raised.

Claims (2)

1. a packing tool, comprise top connection (1), piston (2), fluid cylinder (3), back-off sub (4), fishing joint (6), setting pin (7), unidirectional lock ring (8), outer tube (9), interior pipe (10), deblocking pin (11), lock ring seat pipe (12), cone (13), packing element (14), anchor (15), UNICOM's outer tube (17), snap ring (18), pin (20), close cover (21), break pin (22), ball cover (24), stifled ball (25), sand screen joint (26), washing pipe joint (27), pitching (28), sliding sleeve (31), (32) are managed in UNICOM, it is characterized in that: the internal thread of top connection (1) bottom is connected with the top of back-off sub (4), the external screw thread of top connection (1) bottom is connected with the top of fluid cylinder (3), piston (2) is installed between fluid cylinder (3) and back-off sub (4), piston (2) is under the linked hole on back-off sub (4) top, the sinistral external thread of back-off sub (4) bottom is connected with the levogyrate inner thread on the top of outer tube (9), in piston (2), fishing joint (6) is installed, fishing joint (6) seat is on outer tube (9), piston (2) is connected in fishing joint (6) by setting pin (7), the bottom of piston (2) is connected with the top of lock ring seat pipe (12), unidirectional lock ring (8) is installed in lock ring seat pipe (12) inside, fishing joint (6) is connected on outer tube (9) by deblocking pin (11), the bottom of lock ring seat pipe (12) is connected with cone (13), cone (13) is set with packing element (14) outward, packing element (14) is sleeved on the top of anchor (15), anchor (15) is suspended in cone (13), the lower internal thread of back-off sub (4) is connected with the top of interior pipe (10), (10) have communication groove to interior pipe, sliding sleeve (31) covers the communication groove interior pipe (10) from the inside of interior pipe (10), sliding sleeve (31) is connected on interior pipe (10) by pin (20), pitching (28) seat is in the upper port of sliding sleeve (31), interior pipe (10) is set with outward closes cover (21), closing cover (21) is connected on interior pipe (10) by breaking pin (22), manage (32) in UNICOM and be sleeved on closedown cover (21) outward, snap ring (18) is installed on the top closing cover (21), UNICOM's outer tube (17) is sleeved in UNICOM and manages (32) outward, the top of UNICOM's outer tube (17) is connected with the bottom of anchor (15), the bottom of UNICOM's outer tube (17) is connected with sand screen joint (26), the bottom of interior pipe (10) is connected with the top of ball cover (24), the bottom of ball cover (24) is connected with washing pipe joint (27), stifled ball (25) seat is on the endoporus of washing pipe joint (27), piston (2) there is well-flushing through hole (5), annular space (16) is had between outer tube (9) and interior pipe (10), manage between (32) in UNICOM's outer tube (17) and UNICOM and have vertical-sprue (19), ball cover (24) there is groove (23), well-flushing through hole (5), annular space (16), vertical-sprue (19), groove (23) communicates, UNICOM's outer tube (17) had sand launder (30), communication groove on interior pipe (10) is by closing cover (21), the communication groove of managing in UNICOM on (32) communicates with the sand launder (30) of crossing in UNICOM's outer tube (17).

2. packing tool according to claim 1, it is characterized in that: flow guide sleeve (29) is connected on UNICOM's outer tube (17), the horn mouth of flow guide sleeve (29) is downward, and flow guide sleeve (29) is in sand launder (30) place excessively on UNICOM's outer tube (17).