CN218265861U

CN218265861U - Packer

Info

Publication number: CN218265861U
Application number: CN202222536020.3U
Authority: CN
Inventors: 杨凤志
Original assignee: Daqing Yongchen Petroleum Technology Co ltd
Current assignee: Daqing Yongchen Petroleum Technology Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-01-10
Anticipated expiration: 2032-09-26

Abstract

The utility model belongs to the technical field of oil field production equipment, in particular to a packer, which comprises a threaded mandrel, a retractable threaded pipe and an oil absorption expansion rubber cylinder; a screwing head is arranged at the top end of the threaded mandrel, an inner hexagonal hole is formed in the screwing head, and an upper retaining ring is welded at the bottom of the screwing head; a lower baffle ring is arranged at the bottom of the shrinkable threaded pipe, and a through groove is formed in one side of the shrinkable threaded pipe; the oil absorption expansion rubber cylinder is sleeved on the retractable threaded pipe, the retractable threaded pipe is arranged on the threaded mandrel, and the oil absorption expansion rubber cylinder is a conical cylinder. The packer realizes the packing of the oil conveying pipeline on the well through the oil absorption expansion rubber cylinder, and the expansion of the oil absorption expansion rubber cylinder can meet the requirement of the maintenance packing of the oil conveying pipeline on the well due to the fact that the oil conveying pressure of the oil pipeline on the well is small and the packing in the pipeline is completed.

Description

Packer

Technical Field

The utility model belongs to the technical field of oil field production facility, concretely relates to packer.

Background

Patent No. CN201621282781.9 discloses an oil self-expandable packer which seals a complex borehole by a rubber sleeve which expands after absorbing oil, and solves the problem of poor completion quality of an open hole and an irregular borehole. The expansion rate of the rubber cylinder in the engineering technology of China autonomous research and development of the first self-expansion packer for well descending is 4 times, and therefore the oil absorption self-expansion rubber cylinder can realize the underground packing with higher pressure. Therefore, the oil absorption self-expansion rubber cylinder is widely applied to downhole packing, and if the technology is introduced into the packing of an oil pipeline on a well, the efficiency of maintenance of the oil pipeline on the well or a bottom surface pipeline can be improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a be used for aboveground defeated oil pipeline maintenance to maintain and use packer, this packer realizes the packing of aboveground defeated oil pipeline through oil absorption inflation packing element, because the defeated oil pressure of aboveground pipeline is less, and accomplishes the shutoff in the pipeline, and the inflation that utilizes oil absorption inflation packing element can satisfy aboveground defeated oil pipeline maintenance and pack the needs that separate.

The utility model adopts the technical proposal that: a packer comprises a threaded mandrel, a shrinkable threaded pipe and an oil-absorbing expansion rubber sleeve; a screwing head is arranged at the top end of the threaded mandrel, an inner hexagonal hole is formed in the screwing head, and an upper retaining ring is welded at the bottom of the screwing head; a lower baffle ring is arranged at the bottom of the retractable threaded pipe, and a through groove is formed in one side of the retractable threaded pipe; the oil absorption expansion rubber cylinder is sleeved on the retractable threaded pipe, the retractable threaded pipe is installed on the threaded mandrel, and the oil absorption expansion rubber cylinder is a conical cylinder.

Further, the oil absorption expansion rubber cylinder is replaced by a straight oil absorption expansion rubber cylinder, the straight oil absorption expansion rubber cylinder is sleeved on the retractable threaded pipe (2), and the retractable threaded pipe is arranged on the threaded mandrel.

Furthermore, a blocking disc is welded on the screwing head of the threaded mandrel, and a rubber plate is adhered to the lower end face of the blocking disc.

Further, the diameter of the baffle disc and the rubber plate is larger than the inner diameter of the pipeline to be plugged.

Further, the diameter of the conical top end of the oil absorption expansion rubber cylinder is larger than the inner diameter of the blocked pipeline.

Furthermore, the wall thickness of the shrinkable threaded pipe is 1.5-4.5 mm (the wall thickness is from the outer wall to the root of the thread), and the width of the through groove on the shrinkable threaded pipe is one fifth to three fifths of the outer diameter of the threaded sleeve.

Further, the diameter of the upper retaining ring and the diameter of the lower retaining ring are smaller than the diameter of the oil absorption expansion rubber cylinder.

The utility model has the advantages that: the utility model provides a be used for aboveground defeated oil pipe line maintenance to maintain and use packer, this packer realize the packing of aboveground defeated oil pipe line through oil absorption inflation packing element, because the defeated oil pressure of aboveground pipeline is less, and accomplishes the shutoff in the pipeline, and the inflation that utilizes oil absorption inflation packing element can satisfy aboveground defeated oil pipe line maintenance and maintain the needs that pack. The efficiency and the quality of aboveground oil pipeline maintenance are improved, and the production cost is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is a schematic structural view of a threaded mandrel according to a first embodiment;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic view of a retractable threaded pipe according to an embodiment;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a schematic structural view of an oil-absorbing expansion rubber cylinder in the first embodiment;

FIG. 7 is a schematic structural view of the second embodiment;

FIG. 8 is a schematic structural view of the third embodiment;

fig. 9 is a schematic structural view of a threaded mandrel in the third embodiment.

Detailed Description

Example one

Referring to fig. 1-6, a packer comprises a threaded mandrel 1, a collapsible threaded pipe 2 and an oil-swelling rubber barrel 3; a screwing head 12 is arranged at the top end of the threaded mandrel 1, an inner hexagonal hole 13 is formed in the screwing head 12, and an upper retaining ring 11 is welded at the bottom of the screwing head 12; a lower baffle ring 21 is arranged at the bottom of the shrinkable threaded pipe 2, and a through groove 22 is formed in one side of the shrinkable threaded pipe 2; the oil absorption expansion rubber cylinder 3 is sleeved on the retractable threaded pipe 2, the retractable threaded pipe 2 is installed on the threaded mandrel 1, and the oil absorption expansion rubber cylinder 3 is a conical cylinder; the diameter of the top end of the cone of the oil absorption expansion rubber cylinder 3 is larger than the inner diameter of the blocked pipeline; the wall thickness of the shrinkable threaded pipe 2 is 1.5-4.5 mm (the wall thickness is from the outer wall to the thread root), and the width of the through groove 22 on the shrinkable threaded pipe 2 is one fifth to three fifths of the outer diameter of the thread sleeve; the diameter of the upper retaining ring 11 and the lower retaining ring 21 is smaller than that of the oil absorption expansion rubber cylinder 3.

Taking the maintenance of a leakage point of a DN60 oil pipeline with two meters underground as an example, when the oil pipeline near the leakage point is seriously corroded, the section of the pipeline containing the leakage point needs to be replaced. After the leak-off line is cut, the crude oil remaining in the line may overflow from the cut even after the well is shut in and shut off, since the line is located underground. After cutting off the leak source pipeline, in inserting the pipeline with the packer, oil absorption inflation packing element is the toper packing element, its diameter that inserts back toper bottom slightly is greater than the internal diameter of pipeline, the end is greater than by the sealed pipeline and has played the effect of tentatively packing off, the front end when the toper oil absorption inflation packing element begins the inflation after meetting the profit, the end of toper packing element is under sealed condition, also begin the inflation after meeting the oil inflation, realize further sealing, also the end of toper packing element is tentatively sealed, from the terminal to toper packing element front end of toper packing element gradually sealed in proper order, the effect that the pipeline packed off has been played. Because the pressure of the pipeline above the well is lower than that of the pipeline under the well, and the inner wall of the pipeline is smoother than that of the well bore, the pipeline can be sealed through the oil absorption expansion rubber cylinder. This packer has realized the sealed of surplus fluid, after the butt welding pipeline is prepared to accomplish, take out the packer from being sealed the pipeline, if can't directly draw to drag to draw and take out, then use allen key to twist out the screw dabber (because the inflation of oil absorption inflation packing element, its surface and pipeline in close contact with, cause can't directly take out the packer from the pipeline, just because the inflation of packing element, frictional force has been increased, make the screw dabber can be twisted, and twist out from collapsible threaded sleeve, after the screw dabber is twisted out, because it has logical groove to open on the scalable screwed pipe of thin wall, cause thin wall thread cover to shrink under the effect of the packing element after the inflation, consequently can take out the packer smoothly.

Example two

Referring to fig. 7, the oil absorption expansion rubber cylinder 3 is replaced by a straight oil absorption expansion rubber cylinder 4, the straight oil absorption expansion rubber cylinder 4 is sleeved on the retractable threaded pipe 2, and the retractable threaded pipe 2 is installed on the threaded mandrel 1. The conical cylinder is changed into a straight cylinder, so that the straight cylinder can be applied to embedding of the packing pipeline, namely, a packer of the straight cylinder is put into an oil conveying pipe to be packed, and a valve or a flange is detached after the straight cylinder is expanded to pack the pipeline, so that the pipeline can be maintained conveniently.

EXAMPLE III

Referring to fig. 8 and 9, a baffle disc 14 is welded on the screw head of the threaded mandrel, and a rubber plate 15 is adhered to the lower end surface of the baffle disc 14; the diameter of the baffle disc 14 and the rubber plate 15 is larger than the inner diameter of the pipeline to be plugged. When the oil pipeline with low pressure is sealed, the packer of the embodiment is used, the oil absorption expansion rubber tube at the front end of the packer is inserted into the oil pipe, then the rubber plate at the end part of the packer is tightly abutted to the outlet end part of the oil pipe by force, less residual pressure oil of the oil pipe flows out, and after the expansion rubber tube is expanded and sealed, the packer plays a role in sealing. And the staff continues to carry out maintenance.

Claims

1. A packer, its characterized in that: the packer comprises a threaded mandrel (1), a shrinkable threaded pipe (2) and an oil-absorbing expansion rubber barrel (3); a screwing head (12) is arranged at the top end of the threaded mandrel (1), an inner hexagonal hole (13) is formed in the screwing head (12), and an upper retaining ring (11) is welded at the bottom of the screwing head (12); a lower baffle ring (21) is arranged at the bottom of the shrinkable threaded pipe (2), and a through groove (22) is formed in one side of the shrinkable threaded pipe (2); the oil absorption expansion rubber cylinder (3) is sleeved on the retractable threaded pipe (2), the retractable threaded pipe (2) is installed on the threaded mandrel (1), and the oil absorption expansion rubber cylinder (3) is a conical cylinder.

2. A packer as claimed in claim 1, wherein: the oil absorption expansion rubber cylinder (3) is replaced by a straight oil absorption expansion rubber cylinder (4), and the straight oil absorption expansion rubber cylinder (4) is sleeved on the retractable threaded pipe (2).

3. A packer as claimed in claim 2, wherein: a blocking disc (14) is welded on a screwing head (12) of the threaded mandrel (1), and a rubber plate (15) is adhered to the lower end face of the blocking disc (14).

4. A packer as claimed in claim 3, wherein: the diameter of the baffle disc (14) and the rubber plate (15) is larger than the inner diameter of the pipeline to be plugged.

5. A packer as claimed in claim 1, wherein: the diameter of the top end of the cone of the oil absorption expansion rubber cylinder (3) is larger than the inner diameter of the blocked pipeline.

6. A packer as claimed in any one of claims 1 to 5, wherein: the wall thickness of the shrinkable threaded pipe (2) is 1.5-4.5 mm, and the width of the through groove (22) on the shrinkable threaded pipe (2) is one fifth to three fifths of the outer diameter of the threaded sleeve.

7. A packer as claimed in any one of claims 1 to 5, wherein: the diameters of the upper retaining ring (11) and the lower retaining ring (21) are smaller than the diameter of the oil absorption expansion rubber cylinder (3).