CN201991447U

CN201991447U - Two stage thermal polished rod

Info

Publication number: CN201991447U
Application number: CN2010202739710U
Authority: CN
Inventors: 王志坚; 李小林; 荣雁; 毕友军; 秦苗苗; 马志刚; 陈晓春
Original assignee: 毕友军
Priority date: 2010-07-28
Filing date: 2010-07-28
Publication date: 2011-09-28
Anticipated expiration: 2020-07-28

Abstract

The utility model of a two stage thermal polished rod is a split-type structure. The polished rod and the short connected polished rod are tightly connected through a screw thread to avoid an excessively long polished rod when the polished rod is pulled up. If a crawler-type oil pumping unit of a large stroke is employed, the polished rod must be cut off on site; and an anti-shedding screw thread on the polished rod can not be processed so as to increase labor intensity and bring safety loophole. If a split-type polished rod is employed, shortening of the polished rod can be realized through the upper part of the short connected polished rod being dismounted; and the anti-shedding function of the polished rod can be realized through a connecting screw thread.

Description

Twin-stage thermal recovery polished rod

Technical field:

This utility model twin-stage thermal recovery polished rod is applied in field of petroleum exploitation, on rod-pumped well, is the solid steel pole of a Gent system that is connected the sucker rod top.By the polished rod clamp whole pumping rod is suspended on the rope, realizes the purpose of pumping, simultaneously and well head packing fitted seal well head, crude oil is not leaked by moving up and down of oil pumper.

Technical background:

In the thickened oil recovery process, main technology has steam viscosity reduction, electrical heating, mixes chemical agent etc., the oil extraction technique that the heavy oil wells great majority of well depth below 1000m adopt steam injection, vexed well, blowing, machine to take out, along with science and technology constantly develops, the gas injection technology also improves constantly, and notes are adopted integral process and are applied in widely in the gas injection oil recovery process, realized from the gas injection to the machine, taking out the mode of fixed tubular column, not operation, save cost, reduced labour intensity, increased production efficiency simultaneously.

The polished rod that adopts is the integral type polished rod now, and during gas injection, oil pump plunger piston is transferred to the end, gets out of the way injecting hole and carries out gas injection, change when taking out at needs, on carry dead space, it is long to cause polished rod to stretch out well head, produce interference with oil pumper, stroke is little, and can not use the crawler type oil pumper.

Summary of the invention:

We have designed split type polished rod at this problem, and its main feature is as follows:

1. solve the inaccurate problem of dead space of adjusting

This utility model high-temp thermal recovery polished rod is when adjusting dead space, by carrying the polished rod short circuit on the oil pumper, after the polished rod short circuit proposes well head fully, the bottom polished rod is installed the polished rod clamp, unload polished rod top short circuit (seeing accompanying drawing), this highly is the descending terminating point of oil pumper, directly hangs and takes out.The polished rod of this kind structure need not calculate the measurement polished rod and need what are carried, and anyone can finish this operation.

2. put forward the problem that the polished rod polished rod glides behind the polished rod on solving

This utility model high-temp thermal recovery polished rod is a split-type structural, adopt screw thread to link together closely between polished rod and the polished rod short circuit, avoided owing on to carry the polished rod that polished rod causes long, if adopt big stroke, crawler type oil pumper, must carry out the scene to polished rod blocks, and the anticreep screw thread can not be processed on the polished rod, has improved labour intensity, and there is potential safety hazard; If adopt split type polished rod, on carry after, can realize that polished rod shortens by dismounting top polished rod short circuit, need not on-site cutting, increase by screw thread simultaneously and emitted the anti-drop function of realizing polished rod.

3. solved the polished rod etching problem

This utility model high-temp thermal recovery polished rod surface is plated tungsten alloy and is handled, increase its resistance to corrosion, increased the polished rod case hardness simultaneously, reduced friction factor, in the oil-field thick-oil recovery process, chemical agent need be added in the preceding down-hole of steam injection, and diluent crude oil is because under HTHP, to the polished rod serious corrosion, at above situation, we are through a large amount of field trials, to also improving accordingly the application life of polished rod sealer packing.

Description of drawings:

Accompanying drawing is utility model high-temp thermal recovery polished rod figure for this reason, comprises polished rod short circuit and polished rod two parts, and polished rod directly adopts screw thread to be connected (seeing accompanying drawing) with the polished rod short circuit.

The specific embodiment

This utility model twin-stage thermal recovery polished rod is transferred, and after the polished rod short circuit proposed well location and polished rod main body fully and exposes 30cm, the polished rod short circuit that dismounting polished rod top connects was directly hung and taken out, and operation is finished.

Claims

1. a twin-stage thermal recovery polished rod comprises polished rod and polished rod short circuit, is split-type structural, adopts screw thread to link together closely between polished rod and the polished rod short circuit.