CN212003110U

CN212003110U - Anchoring type packer for leakage finding and string checking

Info

Publication number: CN212003110U
Application number: CN202020381788.6U
Authority: CN
Inventors: 栾德民; 杨臣
Original assignee: Mudanjiang Jingtian Oil Drilling Accessories Co ltd
Current assignee: Mudanjiang Jingtian Oil Drilling Accessories Co ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-11-24
Anticipated expiration: 2030-03-23

Abstract

An anchoring type leak finding and string testing packer. The packer mainly solves the problems that a rubber sleeve is easy to damage and a well mouth cannot stably hold pressure when an existing packer is used for tripping a tubular column. The method is characterized in that: be equipped with bushing pipe (3) between top connection (1) and last center tube (4), bushing pipe (3) outside is equipped with compression packing element (2), and center tube (14) outside is equipped with expansion packing element assembly (13), and center tube (18) lower part outside is equipped with rightting body seam piece (21) down, and the body seam piece (21) upper portion outside of righting is connected with slips (19) and clutch blocks (22), and righting body seam piece (21) sub-unit connection has slide pin (24), and slide pin (24) tip is arranged in slide (31) on center tube (18) lateral wall down. This anchoring formula is looked for leaks and is tested string packer adopts expansion and compression packing element to seal simultaneously, and the steady voltage is effectual, but in time the deblocking when well head pressure is removed and is lifted the tubular column to avoid the packing element to damage.

Description

Anchoring type packer for leakage finding and string checking

Technical Field

The utility model relates to an oil field instrument in the pit, specific anchoring type is looked for hourglass and is tested string packer that says so.

Background

In oil field production, the leak finding string inspection packer is a common downhole tool, and the existing leak finding string inspection packer is an old expansion type packer, namely, the leak finding string inspection of each point is completed by pressing, setting and removing. Because the underground expanding packer is matched with the sand blaster for use, the sand blaster can be started to work under the pressure of more than 1.5-2MPa, and the rubber sleeve of the expanding packer is expanded to a position under the pressure of 0.5-0.8MPa, the rubber sleeve of the expanding packer is still in an expanded state when the pressure of a well head is removed, so that the rubber sleeve of the expanding packer is easy to damage when a tubular column is pulled down to replace the next point; meanwhile, the wellhead cannot stabilize the pressure when the cement truck stops pressurizing. Accordingly, further improvements to existing old expansion packers are needed.

Disclosure of Invention

In order to overcome the not enough of packing element fragile and the steady not pressure of well head when tripping the tubular column of current packer, the utility model provides an anchoring type is looked for the hourglass and is tested string packer, this anchoring type is looked for the hourglass and is tested string packer and adopt expansion and compression packing element sealed simultaneously, and is sealed effectual, when the well head was removed pressure and was lifted the tubular column, the deblocking in time to avoid the packing element to damage.

The technical scheme of the utility model is that: an anchoring type leak finding and string checking packer comprises an upper joint, wherein an upper central pipe is connected inside the upper joint, a liner pipe is arranged between the upper joint and the upper central pipe, a compression rubber cylinder is arranged outside the liner pipe, a setting piston is arranged at the lower part of the compression rubber cylinder, and small holes communicated with the inside of the setting piston are formed in the upper central pipe and the liner pipe; the lower part of the upper central pipe is connected with the central pipe, the lower part of the central pipe is connected with the lower central pipe, an expansion rubber cylinder assembly is arranged outside the central pipe, a lower working cylinder is arranged outside the lower part of the tension rubber cylinder assembly, a cone is arranged between the lower working cylinder and the central pipe, and the cone and the corresponding lower central pipe are provided with pressure relief holes; the body seam piece is right to center tube lower part outside being equipped with, and the body seam piece upper portion outside of right is connected with the slips, and the body seam piece middle part outside of right is equipped with the clutch blocks, and the body seam piece sub-unit connection that right has the slide pin, and slide pin tip arranges in the slide on the center tube lateral wall down.

The slide includes long slide and short slide, long slide and short slide staggered arrangement, just long slide and short slide bottom interconnect.

The setting piston is arranged inside the cylinder barrel, a valve seat is arranged on the lower portion of the setting piston, a valve core is arranged inside the valve seat, a valve cover is arranged on the lower portion of the valve core, and a valve spring is arranged between the valve core and the valve cover.

The upper part of the expansion rubber cylinder assembly is connected with an upper working cylinder, the upper part of the upper working cylinder is connected between the cylinder barrel and the upper central pipe, the upper working cylinder is provided with a liquid flow channel, and the liquid flow channel is communicated with the inside of the cylinder barrel and an annular space between the central pipe and the expansion rubber cylinder assembly.

The utility model discloses following beneficial effect has: since the technical scheme is used, the utility model discloses a sealed effect is realized with the mode of compression packing element to the expansion, and expansion packing element assembly is in operating condition when the well head is removed to press simultaneously, lifts 40 mm's packing element pressure release in the twinkling of an eye at the tubular column, has thoroughly solved the difficult problem that damages with the packing element of steady voltage of old-fashioned expansion packer.

Drawings

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

figure 2 is an expanded view of the chute.

In the figure, 1-upper joint, 2-compression rubber cylinder, 3-liner pipe, 4-upper central pipe, 5-lower rubber cylinder seat, 6-setting piston, 7-valve seat, 8-valve core, 9-valve spring, 10-valve cover, 11-cylinder, 12-upper working cylinder, 13-expansion rubber cylinder assembly, 14-central pipe, 15-lower working cylinder, 16-support ring, 17-cone, 18-lower central pipe, 19-slip, 20-slip spring, 21-centralizing body welding element, 22-friction block, 23-friction block spring, 24-slide pin, 25-pin ring, 26-support ring, 27-lower central pipe pressure relief hole, 28-cone pressure relief hole, 29-pressure transfer hole, 30-communication hole, 31-slide, 32-long slide, 33-short slide.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in figures 1 and 2, the anchoring type leak finding and string checking packer comprises an upper joint 1, wherein an upper central tube 4 is connected to the inside of the upper joint 1, a liner tube 3 is arranged between the upper joint 1 and the upper central tube 4, and the lower end of the liner tube 3 is clamped on a step on the outer wall of the upper central tube 4. The outside of the liner tube 3 is provided with a compression rubber cylinder 2, the upper end of the compression rubber cylinder 2 is propped against the bottom surface of the upper joint 1, and the lower end is provided with a lower rubber cylinder seat 5. The lower part of the lower rubber cylinder seat 5 is provided with a setting piston 6, the setting piston 6 is arranged in the cylinder barrel 11, a sealing ring is arranged between the setting piston 6 and the cylinder barrel 11, the bottom of the setting piston 6 is provided with a valve seat 7, the bottom of the valve seat 7 is positioned on a step outside the upper central tube 4, a valve core 8 is arranged inside the valve seat 7, the outside of the valve core 8 is provided with a valve cover 10, and a valve spring 9 is arranged between the valve core 6 and the valve cover 10. The upper central tube 4 is provided with a pressure transfer hole 29, the liner tube 3 is provided with a communicating hole 30, the pressure transfer hole 29 is communicated with the connecting through hole 30, and the communicating hole 30 is positioned above the valve seat 7. The lower part of the upper central tube 4 is connected with a central tube 14, an expansion rubber cylinder assembly 13 is arranged outside the central tube 14, the upper part of the expansion rubber cylinder assembly 13 is connected with an upper working cylinder 12, the lower part of the expansion rubber cylinder assembly 13 is connected with a lower working cylinder 15, the upper end of the upper working cylinder 12 is connected between the cylinder barrel 11 and the upper central tube 4 through threads, a liquid flow channel is formed in the upper part of the upper working cylinder 12, and the interior of the cylinder barrel 11 is communicated with the upper space of the expansion rubber cylinder assembly 13.

The lower portion of the central tube 14 is connected with a lower central tube 18, a cone 17 is arranged between the lower working barrel 15 and the lower central tube 18, a cone pressure relief hole 28 is formed in the cone, a lower central tube pressure relief hole 27 is formed in the corresponding lower central tube 18, a support ring 16 is arranged at the upper end of the cone 17, the upper end of the support ring 16 abuts against a step outside the central tube 14, and the cone 17 can move up and down between the step outside the lower central tube 18 and the support ring 16. The outer side of the lower central tube 18 at the lower part of the cone 17 is provided with a righting body welding piece 21, and the righting body welding piece 21 can move up and down freely. A plurality of axial grooves are uniformly formed in the outer wall of the righting body welding piece 21, a slip 19 is installed in the upper groove, and slip springs 20 are connected to the middle part and the lower part of the slip 19; a friction block 22 is arranged in a groove in the middle of the righting body welding piece 21, and a friction block spring 23 is arranged between the friction block 22 and the righting body welding piece 21; the lower part of the righting body seam part 21 is connected with a supporting ring 26, a pin ring 25 is arranged between the supporting rings 26 of the righting body seam part 21, two slide way pins 24 are connected onto the pin ring 25, and the slide way pins 24 are positioned in the slide way 31. Slide 31 divide into long slide 32 and short slide 33, and long slide and short slide are two respectively, staggered arrangement, just long slide and short slide bottom interconnect, slide pin 24 is free activity in two sets of long and short slides.

The working principle of the anchoring type leak finding and string testing packer is as follows:

one, setting

The anchoring type leak-finding string-checking packer is connected to a proper position of an oil-water well completion pipe string, the packer is put into a well along with the pipe string, the pipe string is lifted up about 1 m and put down after the positioning is qualified, at the moment, due to the friction action of a friction block 22 and the wall of the well bore, the friction block 22 and a centering body welding part 21 are kept motionless, an internal central pipe descends, a slide way pin 24 enters a long slide way 32 from a short slide way 33 in a slide way 31, a slip 19 ascends relative to the central pipe along with the friction block 22 and the centering body welding part 21, the slip 19 is clamped on the wall of a casing to realize anchoring under the action of a cone 17, the cone 19 ascends relative to a lower central pipe 18 under the action of the weight of the pipe string. Continuing to lower the pipe column to enable the pipe column to be completely seated at the anchoring point, starting to press the pipe column at the moment, enabling liquid to enter the lower part of the setting piston 6 through the pressure transfer hole 29 and the communication hole 30 under the action of pressure, compressing the valve spring 9 through the valve core 8, enabling the liquid at the lower part to enter a space between the expansion rubber cylinder assembly 13 and the central pipe 14, enabling the expansion rubber cylinder assembly 13 to expand outwards, and sealing an annular space of the oil sleeve; meanwhile, under the action of pressure, the liquid pushes the setting piston 6 and the lower rubber cylinder seat 5 upwards to deform the compression rubber cylinder 2, the annular space of the oil sleeve is sealed, and the sealing rate is improved under the action of compressing and expanding the rubber cylinder.

Second, unsealing

1. Releasing the pressure of the well mouth, pushing the lower rubber cylinder seat 5 and the setting piston 6 to return under the elastic force of the compression rubber cylinder 2, and deblocking the compression rubber cylinder 5;

2. lifting the pipe column to drive the lower central pipe 18 to move upwards, keeping the expansion rubber cylinder assembly 13, the cone 17 and the slips 19 still, and instantly relieving the pressure between the expansion rubber cylinder assembly 13 and the central pipe 14 when the cone pressure relief hole 28 on the cone 17 is communicated with the lower central pipe pressure relief hole 27 on the lower central pipe 14; and continuously lifting the pipe column, enabling the cone 17 to ascend along with the pipe column, enabling the cone 17 to be separated from the slips 19, unlocking the clamping point, and enabling the whole pipe column to recover to a well descending state to finish the whole pressure relief and deblocking process.

Claims

1. The utility model provides an anchoring type is looked for hourglass and is tested cluster packer, includes top connection (1), top connection (1) internal connection has last center tube (4), its characterized in that: a liner tube (3) is arranged between the upper joint (1) and the upper central tube (4), a compression rubber cylinder (2) is arranged outside the liner tube (3), a setting piston (6) is arranged at the lower part of the compression rubber cylinder (2), and small holes communicated with the inside of the setting piston (6) are formed in the upper central tube (4) and the liner tube (3); the lower part of the upper central tube (4) is connected with a central tube (14), the lower part of the central tube (14) is connected with a lower central tube (18), an expansion rubber cylinder assembly (13) is arranged outside the central tube (14), a lower working cylinder (15) is arranged on the outer side of the lower part of the tension rubber cylinder assembly (13), a cone (17) is arranged between the lower working cylinder (15) and the central tube, and the cone (17) and the corresponding lower central tube (18) are respectively provided with a pressure relief hole; the outer side of the lower portion of the lower central tube (18) is provided with a centering body welding piece (21), the outer side of the upper portion of the centering body welding piece (21) is connected with a slip (19), the outer side of the middle of the centering body welding piece (21) is provided with a friction block (22), the lower portion of the centering body welding piece (21) is connected with a slide way pin (24), and the end portion of the slide way pin (24) is arranged in a slide way (31) on the side wall of the lower central tube (18).

2. The anchored leak detection string packer of claim 1, wherein: slide (31) are including long slide (32) and short slide (33), long slide (32) and short slide (33) staggered arrangement, just long slide (32) and short slide (33) bottom interconnect.

3. The anchored leak detection string packer of claim 2, wherein: the setting piston (6) is arranged inside the cylinder barrel (11), the lower portion of the setting piston (6) is provided with a valve seat (7), the valve core (8) is arranged inside the valve seat (7), the lower portion of the valve core (8) is provided with a valve cover (10), and a valve spring (9) is arranged between the valve core (8) and the valve cover (10).

4. The anchored leak detection string packer of claim 3, wherein: the upper part of the expansion rubber cylinder assembly (13) is connected with an upper working cylinder (12), the upper part of the upper working cylinder (12) is connected between the cylinder barrel (11) and the upper central tube (4), the upper working cylinder (12) is provided with a liquid flow channel, and the liquid flow channel is communicated with an annular space between the inside of the cylinder barrel (11) and the central tube (14) and the expansion rubber cylinder assembly (13).