CN218759783U - Cleaning and emptying device for inner wall of oil pipe in well - Google Patents

Abstract

A device for cleaning and emptying the inner wall of an oil pipe in a well is characterized in that a conveying wheel is hung on a derrick, a continuous pipe is coiled on a rotary table, the moving end of the continuous pipe goes into the oil pipe hung on a wellhead device by passing through the conveying wheel, the fixed end of the continuous pipe is connected into the rotary shaft of the rotary table, the lower end of a water supply pipe is communicated with a hot water supply system, the upper end of the water supply pipe is connected into the rotary shaft, the water supply pipe is communicated with the continuous pipe, a sealing element is arranged between the upper end of the water supply pipe and the fixed end of the continuous pipe connected into the rotary shaft, so that the communicated part of the water supply pipe and the continuous pipe cannot leak, fluid output by the hot water supply system can only be conveyed into the continuous pipe, a pipe seal and a three-way joint are sleeved outside the continuous pipe, the lower end of the three-way joint is arranged on the oil pipe, the middle part of the oil pipe is provided with a lateral outlet, the pipe seal is arranged on the upper part of the three-way joint, and the sealing element in the pipe seal enables the liquid in the three-way joint to only flow out through the lateral outlet.

Description

Cleaning and emptying device for inner wall of oil pipe in well

Technical Field

The utility model relates to an equipment that oil field oil well wellhead operation was used is an interior oil pipe inner wall of well washs emptying devices.

Background

During workover operations of an oil well, hundreds of oil pipes in the well need to be lifted out of a casing, then the casing is horizontally placed on a well site, and the casing is waited to be continuously used or pulled back to a factory for maintenance. For a thick oil well, thick oil is filled in a pipe column and is tightly adhered to the inner wall of an oil pipe, and even if an oil drain device is arranged on the lower portion of the pipe column, the oil drain device cannot be opened due to the thick oil or the thick oil cannot be drained after the oil drain device is opened. When the oil pipe is lifted from the well, the thick oil is carried to the ground, so that the oil drops to the ground and splashes on equipment in the lifting process of the oil pipe, and when the oil pipe with the thick oil attached to the inner wall is flatly placed on a well site, the thick oil slowly flows from the inner wall of the oil pipe to the well site. After the above-mentioned condition appeared, can cause environmental pollution on the one hand, on the other hand causes crude oil loss, and on the other hand is the greasy dirt that the well head scatters and causes the ground to skid again, and the operation workman slips easily when operating, takes place the incident.

Disclosure of Invention

The utility model aims at designing an in-well oil pipe inner wall washs emptying devices, the oil pipe inner wall that will play out is washd in the well, treats viscous crude on the oil pipe inner wall and plays to ground after the sanitization again, solves the problem that the aforesaid exists, avoids environmental pollution and crude oil loss, ensures operation workman safety in production.

The purpose of the utility model is realized like this: the device comprises a conveying wheel, a continuous pipe, a rotary table, a water supply pipe, a hot water supply system, a pipe seal and a three-way joint, wherein the conveying wheel is hung on a derrick, the rotary table and the hot water supply system are placed on a vehicle plate, the continuous pipe is wound on the rotary table, the moving end of the continuous pipe is placed in an oil pipe hung on a wellhead device by bypassing the conveying wheel, the fixed end of the continuous pipe is connected into a rotary shaft of the rotary table, the lower end of the water supply pipe is communicated with the hot water supply system, the upper end of the water supply pipe is connected into the rotary shaft, the water supply pipe is communicated with the continuous pipe, a sealing element is arranged between the upper end of the water supply pipe and the fixed end of the continuous pipe connected into the rotary shaft, the communication part of the water supply pipe and the continuous pipe cannot leak, fluid output by the hot water supply system can only be conveyed into the continuous pipe, the pipe seal and the three-way joint is sleeved outside the continuous pipe, the lower end of the three-way joint is installed on the oil pipe, a lateral outlet is arranged in the middle part of the oil pipe, the pipe seal is arranged on the upper part of the three-way joint in a sealing manner, and the sealing element in the pipe seal enables the liquid in the three-way joint to only to flow out through the lateral outlet.

The utility model has the advantages that: the coiled tubing can be put into the well while high-pressure hot water is pumped into the oil tube, the hot water can enable the viscosity of thick oil to be reduced to thin oil and separate from the inner wall of the oil tube, the inner wall of the oil tube in the well is washed clean, the washed crude oil can be recovered, the coiled tubing is rolled out after being hot-washed to a certain depth, the coiled tubing occupies the position of the oil tube in the well and is abandoned, the upper part of the oil tube in the well is emptied, the oil tube is lifted to the ground without carrying oil stains, the problems of the oil tube of the prior thick oil well are solved, the environment is not polluted when the thick oil tube of the thick oil well is lifted, the crude oil is not lost, after the oil stains do not fall to the ground, the operation workers cannot slip down and cannot have safety accidents, the moving end of the coiled tubing can realize the simultaneous well washing and the putting-in, the thick oil in all the oil tubes in the well can be smoothly cleaned, and the coiled tubing has remarkable economic benefit and social benefit.

Drawings

Fig. 1 is an assembly view of the present invention.

Fig. 2 is an enlarged view of region a in fig. 1.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As can be seen from the figure, the embodiment of the utility model comprises a conveying wheel 2, a continuous pipe 3, a rotary table 4, a water supply pipe 5, a hot water supply system 6, a pipe seal 8 and a three-way joint 9, wherein the conveying wheel 2 is hung on a derrick 1, the continuous pipe 3 is coiled on the rotary table 4, the moving end of the continuous pipe 3 bypasses the conveying wheel 2 and goes into an oil pipe 10 hung on a wellhead device 11, the fixed end of the continuous pipe 3 is connected into a rotating shaft 4-1 of the rotary table 4, the lower end of the water supply pipe 5 is connected with the hot water supply system 6, the upper end of the water supply pipe 5 is connected into the rotating shaft 4-1, the water supply pipe 5 is communicated with the continuous pipe 3, a sealing element is arranged between the upper end of the water supply pipe 5 and the fixed end of the continuous pipe 3 connected into the rotating shaft 4-1, the communication part of the water supply pipe 5 and the continuous pipe 3 cannot leak, fluid output by the hot water supply system 6 can only be conveyed into the continuous pipe 3, the pipe seal 8 and the three-way joint 9 are sleeved outside the continuous pipe 3, the lower end of the three-way joint 9 is installed on the oil pipe 10, the middle part of the oil pipe 10 is provided with one or 2 lateral outlets 9-1, the pipe seal 8 is installed at the upper part of the three-way joint 9, and the sealing element in the pipe seal 8 prevents the liquid in the three-way joint 9 from flowing out through the upper end of the three-way joint 9 and the outer wall of the continuous pipe 3 (the sealing element in the pipe seal 9 can be pressed through the screwed plug at the upper end of the pipe seal 8) and only can flow out through the lateral outlets 9-1. The wellhead 11 is a conventional device.

The mode that three way connection 9's lower extreme was installed on oil pipe 10 has a plurality ofly, the embodiment of the utility model provides an in adopt threaded connection, oil pipe 10's upper end is the oil pipe coupling, the oil pipe screw thread of three way connection 9 lower extreme is connected with the oil pipe coupling on the oil pipe 10.

Carousel 4, hot water supply system 6 can place on the transport vechicle, and convenient vehicle-mounted transports also can place on sled dress frame handling to well site. The well is placed on a prying frame to be hoisted to a well site, and is suitable for an operation well with long well washing time.

The moving end of the continuous tube is fitted with a cleaning head 12, the cleaning head 12 preferably being a rotatable cleaning head, the cleaning head 12 being capable of rotating when a high pressure fluid stream is passed therethrough. The motive force for rotation of cleaning head 12 is generated by a fluid flow through cleaning head 12. Cleaning head 12 is a device currently used for cleaning pipes.

A lifting rope 7 is arranged on the derrick 1, and the lower end of the lifting rope 7 is connected to a pipe seal 8 or a three-way joint 9. The three-way joint 9 can be lifted up and down by adjusting the lifting rope 7 so as to meet the position of the upper end of the oil pipe 10.

When the tubing 10 is lifted, its upper end is suspended above the wellhead assembly 11 (the tubing 10 passes through the wellhead assembly 11), and is fixed to the wellhead assembly 11 by a spider (or elevator) on the wellhead assembly 11, and the tubing 10 is suspended in a casing 13. Then the cleaning head 12 and the coiled tubing 3 are put into the oil pipe 10, the tube seal 8 and the three-way joint 9 are installed, and the high-pressure hot water provided by the hot water supply system 6 is injected into the coiled tubing 3, so that the inner wall of the oil pipe 10 can be cleaned while the coiled tubing 3 is put down. The hot water pressure provided by the hot water supply system 6 can reach 10-20MPa, and the temperature can reach more than 80 ℃. When the high-pressure hot liquid flows through the cleaning head 12, the cleaning head 12 rotates in all directions in the oil pipe 10. When the high-pressure hot liquid flows through the cleaning head 12, downward thrust can be generated, so that the coiled tubing 3 descends in the oil pipe 10, and the coiled tubing 3 can be cleaned while descending.

The utility model discloses can realize 3 limit of coiled tubing and go into limit simultaneously and wash the pipe, be particularly suitable for the viscous crude well and wash oil pipe at the sleeve pipe. After the high-viscosity crude oil is filled in the oil pipe, the equipment is difficult to drop into the deep part of the oil pipe due to the resistance of the high-viscosity crude oil, and the thick oil in the deep part of the oil pipe 10 can be cleaned only by adopting a mode of washing the pipe and dropping.

The utility model discloses during the use, hot water is sent into through coiled tubing 3, makes the viscous crude thin, breaks away from the oil pipe inner wall, and the oil water mixture flows up through the annular channel between coiled tubing 3 and oil pipe 10, follows side direction export 9-1 flow out and is retrieved, in the mixture of retrieving can flow back sleeve pipe 13, also can flow to the recovery jar on the well site.

The outer wall of tubing 10 is scraped off by a self-seal on wellhead 11 during tripping. Therefore, the process the utility model discloses clean no greasy dirt when oil pipe after the washing plays to ground.

Claims (1)

1. The utility model provides an in-well oil pipe inner wall washs emptying devices, includes delivery wheel (2), continuous pipe (3), carousel (4), delivery pipe (5), hot water feed system (6), tub is sealed (8), three way connection (9), characterized by: the conveying wheel (2) is hung on a derrick (1), the continuous pipe (3) is coiled on a rotary table (4), the moving end of the continuous pipe (3) is placed into an oil pipe (10) hung on a wellhead device (11) by bypassing the conveying wheel (2), the fixed end of the continuous pipe (3) is connected into a rotary shaft (4-1) of the rotary table (4), the lower end of a water supply pipe (5) is communicated with a hot water supply system (6), the upper end of the water supply pipe (5) is connected into the rotary shaft (4-1), the water supply pipe (5) is communicated with the continuous pipe (3), a sealing element is arranged between the upper end of the water supply pipe (5) and the fixed end of the continuous pipe (3) connected into the rotary shaft (4-1), so that the communication part between the water supply pipe (5) and the continuous pipe (3) cannot leak, fluid output by the hot water supply system (6) can be only conveyed into the continuous pipe (3), and the pipe sealing (8), the three-way joint (9) is sleeved outside the continuous pipe (3), the lower end of the three-way joint (9) is installed on an oil pipe (10), a lateral outlet (9-1) is formed in the middle of the oil pipe (10), the pipe seal (8) is installed on the upper portion of the three-way joint (9), and a sealing element in the pipe seal (8) enables liquid in the three-way joint (9) to flow out only through the lateral outlet.

Images