CN210370560U

CN210370560U - Multipurpose packer feeding tool

Info

Publication number: CN210370560U
Application number: CN201921410308.8U
Authority: CN
Inventors: 张健; 张强兵; 王琼; 马小平; 陶风; 朱向斌; 杨阳; 杨改; 王璞; 程市君
Original assignee: Sunrise Energy Technology Co ltd
Current assignee: Sunrise Energy Technology Co ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-04-21
Anticipated expiration: 2029-08-28

Abstract

The utility model relates to a downhole tool, concretely relates to packer of multipurpose send into instrument. The sealing device comprises an anchoring part, a sealing element, an upper sealing element and a lower sealing element, wherein the sealing element is installed at the bottom end of the anchoring part in a threaded mode, the sealing element is fixedly connected with the anchoring part through a fastening bolt, and the sealing element and the lower sealing element are sleeved on the sealing element at intervals in an upper shape and a lower shape. The multipurpose packer feeding tool has the characteristics of easy releasing and emergency releasing, can directly throw balls and press the packer through the ball seat, sets the packer, does not need to additionally connect a pressure-holding device at the lower end of the packer, and simplifies the structure of a pipe column; after setting is finished, the tubular column is pressed and lifted through annulus to realize releasing, the operation is simple and easy, when the hydraulic releasing mode fails, the tubular column can be rotated to realize emergency releasing, the problems of difficult releasing and lack of emergency releasing function existing in the existing feeding tool are solved, and the requirement of underground operation of an oil-gas well is met.

Description

Multipurpose packer feeding tool

Technical Field

The utility model relates to a downhole tool, concretely relates to packer of multipurpose send into instrument.

Background

When the oil-gas well is subjected to multi-section fracturing work of well cementation and horizontal wells, the annular space needs to be sealed by using a packer, so that an isolated production zone controls production liquid and has a protection effect on a sleeve. When the packer is used in a highly-deviated well and a deep well, a corresponding feeding tool is needed, the packer is lowered to a specified position underground by the feeding tool, the packer is anchored on the wall of a casing after being set, and the feeding tool is smoothly released and lifted to be separated from the packer.

The current releasing mode of sending into the instrument is mostly mechanical type releasing, and this kind of releasing mode is when carrying out deep well or big inclined shaft operation, and the moment of torsion transmission is not in place, and the tensile force can not accurate calculation, leads to the releasing difficulty, influences subsequent production operation in the pit. In addition, the traditional setting tool has a single releasing function, the emergency releasing function is difficult to realize when an unknown condition occurs, and the adaptability is poor, so a new packer setting tool is needed to solve the defects.

Disclosure of Invention

The utility model aims to provide a: the multipurpose packer sending tool is easy to release and has an emergency releasing function, and solves the problems that the existing sending tool is difficult to release and lacks the emergency releasing function.

The technical scheme of the utility model is that:

a multi-purpose packer running tool comprising an anchor, a setting element, an upper seal element, and a lower seal element, wherein: the bottom end screw thread of anchor has sits the piece of sealing, sits the piece of sealing and passes through fastening bolt and anchor fixed connection, and it is upper and lower form interval cover to be equipped with sealing member and lower sealing member on sitting the piece of sealing.

The anchoring piece constitute by top connection, center tube, connecting piece and piston, the center tube is installed to the bottom screw thread of top connection, the center tube passes through fastening bolt and top connection fixed connection, the cover is equipped with the connecting piece between center tube and the top connection, connecting piece and center tube key-type connection, the cover is equipped with the piston between center tube and the connecting piece, the piston passes through shear pin and center tube fixed connection.

The upper joint, the central pipe and the piston are in a reducing cylinder shape.

The small-diameter cylinder of the central tube is provided with pressure transmission holes at intervals.

The connecting piece comprises an installation cylinder and elastic claws, and a plurality of elastic claws are fixedly arranged on the port of the installation cylinder in a radial shape.

An internal spline is arranged in the mounting cylinder.

The outer side of the end of the elastic claw is provided with an external thread, and the inner side of the end of the elastic claw is provided with a limiting flange.

The piston is provided with a supporting flange corresponding to the limiting flange, and an inner hole of the piston is a reducing hole.

The setting piece by sealing joint, the adapter sleeve, the nipple joint, dabber and ball seat constitute, the adapter sleeve is installed to sealing joint's bottom screw thread, the adapter sleeve passes through fastening bolt and sealing joint fixed connection, the nipple joint is installed to the bottom screw thread of adapter sleeve, go up the nipple joint and pass through fastening bolt and adapter sleeve fixed connection, the nipple joint is installed down to the bottom screw thread of going up the nipple joint, lower nipple joint passes through fastening bolt and last nipple joint fixed connection, the dabber is installed to the bottom screw thread of lower nipple joint, the dabber passes through fastening bolt and lower nipple joint fixed connection, the ball seat is installed to the bottom screw thread of dabber, the ball seat passes through.

The sealing joint, the connecting sleeve, the short section, the mandrel and the ball seat are in a reducing cylinder shape.

And a positioning flange A is arranged on the sealing joint.

And a plurality of seating holes are respectively arranged on the upper short section and the lower short section at intervals.

And a positioning flange B is arranged on the mandrel.

The inner hole of the ball seat is a reducing hole.

The upper sealing element and the lower sealing element are composed of sealing rubber cylinders and spacer rings, the sealing rubber cylinders are arranged at intervals, and the spacer rings are arranged between the sealing rubber cylinders.

The utility model has the advantages that:

the multipurpose packer feeding tool has the characteristics of easy releasing and emergency releasing, can directly throw balls and press the packer through the ball seat, sets the packer, does not need to additionally connect a pressure-holding device at the lower end of the packer, and simplifies the structure of a pipe column; after setting is finished, the tubular column is pressed and lifted through annulus to realize releasing, the operation is simple and easy, when the hydraulic releasing mode fails, the tubular column can be rotated to realize emergency releasing, the problems of difficult releasing and lack of emergency releasing function existing in the existing feeding tool are solved, and the requirement of underground operation of an oil-gas well is met.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the central tube of the present invention;

fig. 3 is a schematic structural view of the elastic claw of the present invention;

fig. 4 is a schematic structural diagram of the piston of the present invention;

fig. 5 is a schematic structural view of the sealing joint of the present invention;

fig. 6 is a schematic structural view of an upper short section of the present invention;

fig. 7 is a schematic structural view of the mandrel of the present invention;

fig. 8 is a schematic structural view of the ball seat of the present invention;

fig. 9 is a schematic structural view of the sealing member of the present invention;

FIG. 10 is a schematic view of the operation of the present invention;

fig. 11 is a schematic view of the hydraulic setting operation of the present invention;

FIG. 12 is a schematic view of the hydraulic releasing device of the present invention;

FIG. 13 is a schematic view of the structure at A in FIG. 12;

fig. 14 is a schematic diagram of the emergency release of the present invention.

In the figure: 1. the sealing device comprises an upper sealing element, 2, a lower sealing element, 3, an upper joint, 4, a central pipe, 5, a piston, 6, a pressure transmission hole, 7, an installation barrel, 8, an elastic claw, 9, a limiting flange, 10, a shearing pin, 11, a supporting flange, 12, a sealing joint, 13, a connecting sleeve, 14, a mandrel, 15, a ball seat, 16, a positioning flange A, 17, an upper short section, 18, a lower short section, 19, a positioning flange B, 20, a sealing rubber barrel, 21, a spacer ring, 22, a packer, 23 and a setting hole.

Detailed Description

The multipurpose packer feeding tool comprises an anchoring piece, a setting piece, an upper sealing piece 1 and a lower sealing piece 2, wherein the anchoring piece comprises an upper joint 3, a central pipe 4, a connecting piece and a piston 5, the upper joint 3, the central pipe 4 and the piston 5 are in a reducing cylinder shape, and the upper joint 3 is used for connecting a pipe column to perform setting and releasing work; center tube 4 is installed to the bottom screw thread of top connection 3, and center tube 4 passes through fastening bolt and 3 fixed connection of top connection, and the interval is provided with biography pressure hole 6 on the path section of thick bamboo of center tube 4, passes and presses hole 6 to be used for making the inside and outside intercommunication of center tube 4 to transmit pressure when carrying out the work of giving up.

A connecting piece is sleeved between the central tube 4 and the upper joint 3 and consists of an installation tube 7 and an elastic claw 8, an internal spline is arranged in the installation tube 7, an external spline is arranged on the central tube 4 corresponding to the installation tube 7, the installation tube 7 is connected with the central tube 4 through the spline, namely, the central tube 4 positions the installation tube 7, so that the installation tube 7 cannot generate displacement and rotation; a plurality of elastic claws 8 are radially and fixedly arranged on the port of the mounting cylinder 7, the elastic claws 8 are used for locking the packer 22, and the elastic claws 8 are in an inward bending retraction state in a natural state; the outside of the end of the elastic claw 8 is provided with an external thread which is a left-hand external thread so as to be connected with a packer 22, and the inside of the end of the elastic claw 8 is provided with a limit flange 9, and the limit flange 9 is used for preventing the elastic claw 8 from retracting inwards.

A piston 5 is sleeved between the central pipe 4 and the connecting piece, the piston 5 is fixedly connected with the central pipe 4 through a shear pin 10, and the shear pin 10 is used for positioning the piston 5 and preventing the piston 5 from displacing before the packer 22 is set; be provided with supporting flange 11 corresponding to limiting flange 9 on the piston 5, supporting flange 11 is used for cooperating limiting flange 9 and provides the support for elastic claw 8 to make elastic claw 8 keep straightening the state before giving up, the hole of piston 5 is the reducing hole, and piston 5's reducing hole and center tube 4 cooperation form a both ends confined working chamber, and this working chamber is through passing the hole intercommunication of pressure 6 and center tube 4.

The bottom end screw thread of anchor has the setting piece, and the setting piece comprises sealing joint 12, adapter sleeve 13, nipple joint, dabber 14 and ball seat 15, and sealing joint 12, adapter sleeve 13, nipple joint, dabber 14 and ball seat 15 are the reducing tube-shape. The sealing joint 12 is in threaded connection with the central pipe 4, the sealing joint 12 is fixedly connected with the central pipe 4 through a fastening bolt, a positioning flange A16 is arranged on the sealing joint 12, a connecting sleeve 13 is installed at the bottom end of the sealing joint 12 through a thread, and the connecting sleeve 13 is fixedly connected with the sealing joint 12 through the fastening bolt; an upper sealing element 1 is sleeved between the connecting sleeve 13 and the positioning flange A16, and the upper sealing element 1 is used for sealing an annular space between the sealing joint 12 and the packer 22.

An upper short section 17 is installed on the bottom end thread of the connecting sleeve 13, the upper short section 17 is fixedly connected with the connecting sleeve 13 through a fastening bolt, a lower short section 18 is installed on the bottom end thread of the upper short section 17, the lower short section 18 is fixedly connected with the upper short section 17 through the fastening bolt, a plurality of setting holes 23 are respectively arranged on the upper short section 17 and the lower short section 18 at intervals, and the setting holes 23 are used for conducting drilling fluid so as to carry out setting operation on the packer 22 in the working process; the bottom end of the lower short section 18 is provided with a mandrel 14 in a threaded manner, and the mandrel 14 is fixedly connected with the lower short section 18 through a fastening bolt.

Be provided with location flange B19 on the dabber 14, the bottom thread mounting of dabber 14 has ball seat 15, and ball seat 15 passes through fastening bolt and dabber 14 fixed connection, and the hole of ball seat 15 is the reducing hole to the ball that the card drops into in the course of the work, thereby make drilling fluid can't flow out, with formation high pressure to carry out the setting work. Lower sealing element 2 is sleeved between ball seat 15 and positioning flange B19, lower sealing element 2 and upper sealing element 1 are formed by packing rubber tube 20 and spacer ring 21, packing rubber tube 20 is arranged at intervals, packing rubber tube 20 has a sealing function, and spacer ring 21 is arranged between packing rubber tubes 20.

The working process of the running tool is as follows: the setting preparation is completed by threadedly installing a mating packer 22 through the anchor, connecting the running tool upper sub 3 to the pipe string, and then lowering the running tool and packer 22 to a predetermined downhole location.

After the setting preparation work is finished, the ball is thrown into the feeding tool, the thrown ball continuously falls under the action of gravity until being clamped in the ball seat 15, then high-pressure drilling fluid is injected into the feeding tool through the upper joint 3, the high-pressure drilling fluid can only enter the packer 22 through the setting hole 23 due to the fact that the thrown ball and the ball seat 15 block the feeding tool, and the high-pressure drilling fluid entering the packer 22 is matched with a setting mechanism in the packer 22 to perform setting.

After the packer 22 is set, the pump is stopped, then high-pressure drilling fluid is injected into an annular space between the upper connector 3 and the casing, the cavity between the piston 5 and the packer 22 is filled with the high-pressure drilling fluid, the piston 5 is provided with a high-pressure area outside, the piston 5 is provided with a low-pressure area inside, the shearing pin 10 on the piston 5 is sheared by pressure difference, the piston 5 is pushed to move upwards, the drilling fluid in the working cavity below the piston 5 enters an inner hole of the central tube 4 through the pressure transmitting hole 6, the piston 5 reaches a limit position when the upper end head of the piston 5 is contacted with the central tube 4, and the piston 5 stops moving under the limit action of the central tube.

In the moving process of the piston 5, the supporting flange 11 of the piston 5 is staggered with the limiting flange 9 of the elastic claw 8, the elastic claw 8 loses support and retracts under the action of the elasticity of the elastic claw 8, and the elastic claw 8 retracts due to inward bending under the natural state, so that the retracted elastic claw 8 loses the connection relation with the packer 22, then the pump is stopped, the pipe column is lifted, and the sending tool can be separated from the packer 22, and the releasing operation is realized.

When the above hydraulic releasing mode fails or the packer 22 encounters an obstruction, the emergency releasing operation can be realized by rotating the string, specifically: the sending tool is pressed down through the pipe column to reduce the frictional resistance of threads between the sending tool and the packer 22, then the pipe column is rotated rightwards, because the elastic claw 8 is in threaded connection with the packer 22 through the left-handed threads, and the packer 22 is fixed on the wall of a casing pipe and cannot rotate, the elastic claw 8 can be separated from the packer 22 through the pipe column being rotated rightwards, and then the pipe column is lifted upwards to take out the sending tool, so that the releasing operation can be realized.

Claims

1. A multipurpose packer running tool consisting of an anchor, a setting element, an upper seal (1) and a lower seal (2), characterized in that: the bottom end screw thread of anchor has sits the piece of sealing, sits the piece of sealing and passes through fastening bolt and anchor fixed connection, and it is upper and lower form interval cover to be equipped with on the piece of sealing to sit seals and seals (1) and lower sealing (2).

2. A multi-purpose packer running tool according to claim 1, wherein: the anchor by top connection (3), center tube (4), connecting piece and piston (5) constitute, center tube (4) are installed to the bottom screw thread of top connection (3), center tube (4) pass through fastening bolt and top connection (3) fixed connection, the cover is equipped with the connecting piece between center tube (4) and top connection (3), connecting piece and center tube (4) key-type connection, the cover is equipped with piston (5) between center tube (4) and the connecting piece, piston (5) are through shearing pin (10) and center tube (4) fixed connection.

3. A multi-purpose packer running tool according to claim 2, wherein: the small-diameter cylinder of the central tube (4) is provided with pressure transmission holes (6) at intervals.

4. A multi-purpose packer running tool according to claim 2, wherein: the connecting piece constitute by installation section of thick bamboo (7) and elastic claw (8), be equipped with a plurality of elastic claw (8) on the port of installation section of thick bamboo (7) radially admittedly, the end outside of elastic claw (8) is provided with the external screw thread, the end inboard of elastic claw (8) is provided with spacing flange (9).

5. A multi-purpose packer running tool according to claim 2, wherein: the piston (5) is provided with a supporting flange (11) corresponding to the limiting flange (9), and an inner hole of the piston (5) is a reducing hole.

6. A multi-purpose packer running tool according to claim 1, wherein: the setting piece consists of a sealing joint (12) and a connecting sleeve (13), nipple joint, dabber (14) and ball seat (15) constitute, adapter sleeve (13) are installed to the bottom screw thread of sealing joint (12), adapter sleeve (13) pass through fastening bolt and sealing joint (12) fixed connection, nipple joint (17) are installed to the bottom screw thread of adapter sleeve (13), go up nipple joint (17) and adapter sleeve (13) fixed connection through fastening bolt, lower nipple joint (18) are installed to the bottom screw thread of going up nipple joint (17), nipple joint (18) pass through fastening bolt and last nipple joint (17) fixed connection down, dabber (14) are installed to the bottom screw thread of lower nipple joint (18), dabber (14) pass through fastening bolt and lower nipple joint (18) fixed connection, ball seat (15) are installed to the bottom screw thread of dabber (14), ball seat (15) pass through fastening bolt and dabber (14) fixed connection.

7. A multi-purpose packer running tool according to claim 6, wherein: the sealing joint (12) is provided with a positioning flange A (16).

8. A multi-purpose packer running tool according to claim 6, wherein: and a plurality of seating holes (23) are respectively arranged on the upper short section (17) and the lower short section (18) at intervals.

9. A multi-purpose packer running tool according to claim 6, wherein: and a positioning flange B (19) is arranged on the mandrel (14).

10. A multi-purpose packer running tool according to claim 1, wherein: the upper sealing element (1) and the lower sealing element (2) are composed of sealing rubber cylinders (20) and spacer rings (21), the sealing rubber cylinders (20) are arranged at intervals, and the spacer rings (21) are arranged between the sealing rubber cylinders (20).