CN2256033Y

CN2256033Y - Production apparatus using oil pipe telescopic joint

Info

Publication number: CN2256033Y
Application number: CN 96222997
Authority: CN
Inventors: 黄伟
Original assignee: Drilling And Production Technology Research Institute Of Changqing Petroleum Exploration Bureau
Current assignee: Drilling And Production Technology Research Institute Of Changqing Petroleum Exploration Bureau
Priority date: 1996-09-25
Filing date: 1996-09-25
Publication date: 1997-06-11
Anticipated expiration: 2006-09-25

Abstract

The utility model relates to oil extraction equipment using an oil pipe expansion joint in an oil extraction industry of oil machinery. An oil pipe expansion joint is additionally arranged on a separated extraction layered oil extraction pipe column which is composed of an oil pumping rod, an oil pipe, a casing pipe, an oil well pump, and a packer, after a seat of the packer is sealed, the problems that the bend of an oil pipe column is caused due to fact that a pipe column is pressed due to the pipe column which is placed on a well opening, and the oil pumping rod is abraded in an inclined mode are solved. When oil is pumped, the creepage of a pump is also overcome by the oil pipe expansion joint, and the packer is free from creeping. A working condition is improved, and the working life of a rubber cylinder is enhanced.

Description

A kind of oil production equipment of using the oil pipe expansion coupling

The utility model belongs to petroleum machinery oil recovery field, a kind of oil production equipment of using the oil pipe expansion coupling that layering water proof oil production technology is used in the oil-water well of especially suitable big section sleeve pipe heavy corrosion.

The oil-water well of some early stage finishing drilling returns cement and does not seal water layer on when well cementation, cause big section sleeve pipe to produce serious electrochemical corrosion and destroy, and the water of water layer enters the tubing and casing annular space, the surge of well water amount, and the water injection well water injection rate increases greatly.These wells can adopt the packer packing water barrier, promptly rely in the flow string band packer lower going-into-well seat to be enclosed on the internal surface of sleeve pipe between water layer and the oil reservoir, seal the tubing and casing annular space.This have two kinds of forms at present every mining method and oil production by layer method, a kind of be back-off packer every mining method, another kind is that the retrievable packer is every mining method, as shown in Figure 1.

Back-off packer is a permanent type, exists by the stifled back of cards such as dirt, wax, sand and is difficult for processing, and shortcoming such as drilling tool completion twice, and the retrievable packer is simple every mining method, and a drilling tool completion, cost is low, is widely adopted.But have following two subject matters, first oil pipe, pump, packer are associated in together, and oil well pump causes wriggling in the course of work of up-down stroke, cause the packing element wear out failure then; It two is after packer set produces lower fulcrum, causes drilling pipe bending, and sucker rod partial wear causes sucker rod to break, take off then, and pump detection period is short.

The purpose of this utility model is to overcome the weak point of above-mentioned prior art, and a kind of oil production equipment of using the oil pipe expansion coupling is provided, and overcomes the bending of the wriggling and the tubing string of sucker rod, prolongs the life-span of rod tube and packer.

The utility model is achieved in that a kind of oil production equipment of using the oil pipe expansion coupling, form by sucker rod 3, oil pipe 2, sleeve pipe 1, oil well pump 4, packer 6 etc., be connected with oil pipe expansion coupling 8 on oil pipe 2 tubing strings between oil well pump 4 and the packer 6, the effectively flexible distance of oil pipe expansion coupling 8 between full stretching and full compression state is 500mm～1200mm.

Advantage of the present utility model is that the oil pipe expansion coupling is transformed into its first half with the wriggling that oil well pump work produces, the relative transfixion of packer like this, thus prolonged life-span of packing element greatly; And expansion coupling top tubing string not pressurized can make tubing string avoid bending, thereby reduce sucker rod partial wear, prolonged bar, tube lifetime, sucker rod breaks, take off thereupon and significantly reduce.

Fig. 1 is that existing retrievable packer is every adopting or separate zone production tubing string figure.

Fig. 2 is a kind of oil production equipment schematic diagram of using the oil pipe expansion coupling.

Among the figure, 1-sleeve pipe, 2-oil pipe, 3-sucker rod, 4-oil well pump, 5-back-off sub, 6-packer, 7-oil reservoir, 8-oil pipe expansion coupling, 9-wellhead flange.

Below in conjunction with accompanying drawing the utility model is described further.The utility model is made up of sucker rod 3, oil pipe 2, sleeve pipe 1, oil well pump 4, packer 6 etc., be connected with oil pipe expansion coupling 8 on oil pipe 2 tubing strings between oil well pump 4 and the packer 6, the effectively flexible distance of oil pipe expansion coupling 8 between full stretching and full compression state is 500mm～1200mm.

Oil pipe expansion coupling packer is every adopting or the separate zone production tubing string is followed successively by oil pipe from bottom to up, packer, oil pipe, the oil pipe expansion coupling, oil extraction pump, oil pipe, wellhead flange, when base sealed packer, the well head tubing string exposes 200～400mm, after the packer set, to expose tubing string transfers to the wellhead receptacle flange, expansion coupling is the state that draws back full when transferring, expansion coupling just in time is in 1/3～1/2 opening behind the wellhead receptacle flange like this, when oil well pump is started working and produce wriggling, the servo-actuated of the expansion coupling first half, and Lower Half and bottom oil pipe, packers etc. are all motionless, and on the other hand, the rod tube on expansion coupling top is in and loosens plumbness entirely.The oil pipe expansion coupling can adopt and use when acid fracturing, its stretch entirely and the full compression state between effectively flexible apart from being 500mm～1200mm.

Claims

1. oil production equipment of using the oil pipe expansion coupling, form by sucker rod (3), oil pipe (2), sleeve pipe (1), oil well pump (4), packer (6), it is characterized in that: on oil pipe (2) tubing string between oil well pump (4) and the packer (6), be connected with oil pipe expansion coupling (8).

2. a kind of oil production equipment of using the oil pipe expansion coupling according to claim 1 is characterized in that: the effectively flexible distance of oil pipe expansion coupling (8) between full stretching and full compression state is 500mm～1200mm.