Technology of preventing slantingly suck rod and oil pipe containing polymer of beam unit

A technology for pumping wells and anti-eccentric wear, which is applied to drilling equipment, earthwork drilling, drill pipes, etc. It can solve the problems of increasing the proportion of sucker rod breakage and moving up and down, so as to prolong the pump inspection cycle and slow down the downward resistance Amplifies, eliminates the effect of lateral movement

Inactive Publication Date: 2005-01-05
DAQING OILFIELD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing anti-eccentric wear method is to install a centralizing ring on the eccentric wear part of the sucker rod and extend it up and down by 50 meters or take aggravating measures on the oil pump. From the situation of the secondary eccentric wear well, the eccentric wear section often moves up and down Phenomenon, take aggravated measures to increase the proportion of sucker rod breakage

Method used

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  • Technology of preventing slantingly suck rod and oil pipe containing polymer of beam unit
  • Technology of preventing slantingly suck rod and oil pipe containing polymer of beam unit
  • Technology of preventing slantingly suck rod and oil pipe containing polymer of beam unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1. The anti-eccentric wear process implemented on the North 1-51-535 of the polymer-containing pumping unit comprises the following steps:

[0028] (1) A centralizing ring 5 is installed at 20cm below the coupling of each sucker rod 4 in the whole well, and the rod diameter is unified up and down. (2), a. Change the plunger 2 assembly of the oil well pump into a single floating valve group, that is, cancel the upstream floating valve group, and at the same time change the four-hole structure of the oil outlet of the upper valve cover 3 into three circular arcs The structure of the groove 1; b. Shorten the length of the plunger 2: the length of the plunger 2 is shortened from the original 1200mm to 900mm; c. The pump gap is enlarged: the radial gap between the plunger 2 and the pump barrel 6 is enlarged from 20μm-70μm to 220 μm. (3) Rotate the sucker rod regularly. After adopting this technical scheme and running for 1035 days, no rod breakage occurred.

Embodiment 2

[0029] Embodiment 2, the anti-eccentric wear process implemented on 1-63 in the polymer-containing pumping well comprises the following steps:

[0030] (1) A centralizing ring 5 is added at 25cm below the collar of each sucker rod 4 in the whole well, and the rod diameter is unified. (2), a. Change the plunger 2 assembly of the oil well pump into a single floating valve group 7, that is, cancel the upstream floating valve group, and at the same time change the four-hole structure of the oil outlet of the upper valve cover 3 into three circles The structure of the arc groove 1; b. Shorten the length of the plunger 2: the length of the plunger 2 is shortened from the original 1200mm to 900mm; c. The pump gap is enlarged: the radial gap between the plunger 2 and the pump cylinder 6 is enlarged from 20 μm to 70 μm to 120 μm. (3) Rotate the sucker rod regularly. After adopting this technical scheme and running for 1035 days, no rod breakage occurred.

Embodiment 3

[0031] Embodiment 3. The anti-eccentric wear process implemented on the North 1-42-B 55 well of the polymer-containing pumping unit includes the following steps:

[0032] (1), a centralizing ring 5 is installed at 23cm below the collar of each sucker rod 4 in the whole well, and the diameter of each sucker rod in the whole well is small at the top and large at the bottom. (2), a. Change the plunger 2 assembly of the oil well pump into a single floating valve group 7, that is, cancel the upstream floating valve group, and at the same time change the four-hole structure of the oil outlet of the upper valve cover 3 into three circles The structure of the arc groove 1; b. Shorten the length of the plunger 2: the length of the plunger 2 is shortened from the original 1200mm to 900mm; c. The pump gap is enlarged: the radial gap between the plunger 2 and the pump cylinder 6 is enlarged from 20 μm to 70 μm to 150 μm. (3) Rotate the sucker rod regularly. After adopting this technical...

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Abstract

The invention relates to a partial friction preventing process for polymer oil pumping unit. It includes following steps: (1) each oil-pumping pole of the whole well is hooped with a righting ring, and unifies the pole radius up and down; (2) a. the upper and subjacent mantles oil outlets are three arc slots; b. the length of the pole piston is 900nm; c. the interval between the pole piston and the pump barrel radius direction is 120 micrometer to 220 micrometer. The device can prevent the partial friction of the oil pushing pole and oil pipe, prolongs the maintenance period of the oil pumping unit.

Description

Technical field: [0001] The invention relates to an anti-partial wear process for pumping wells in the field of oil production engineering, and belongs to an anti-partial wear process for pumping wells containing polymers. Background technique: [0002] In the field of oil production, when the pumping unit is operating, the sucker rod reciprocates up and down in the tubing. Under a certain external force, part of the sucker rod will contact and rub against the inner wall of the tubing for a long time, and the sucker rod is easy to break or the tubing is eccentrically worn. Since the development of polymer flooding, the problem of eccentric wear in pumping wells has become increasingly prominent. According to statistics, 880 wells with eccentric wear were found in the Sazhong area in 2000, accounting for 28.2% of the pump inspection wells, an increase of 19.4% and 9.7% compared with 1998 and 1999, respectively. The average maintenance cycle was shortened from 730 days before ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10
Inventor 王德民孙智王研宋旭东李德胜任刚
Owner DAQING OILFIELD CO LTD
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