Salvage method for throttle buried and stuck by fracturing sand

A technology for blocking chokes and chokes, which is used in earth-moving drilling, surveying, wellbore/well components, etc., can solve the problems of less disclosure and unsatisfactory discharge effect, and achieve convenient and efficient salvage and high salvage efficiency. Effect

Inactive Publication Date: 2019-06-21
咸阳荣达石油技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the complex processing operation of downhole problematic chokes, there are few publications in the prior art for the salvage method of fracturing sand buried stuck chokes, only retrieved, and published in the collection of the 8th Ningxia Young Scientists Forum , it is mentioned in the exploratory application of coiled tubing technology on salvage chokes that when sand chokes in gas wells are buried by fracturing sand, sand can be discharged by wellhead discharge. However, this discharge method It can only meet the sand discharge under the normal operation of the gas well restrictor, and its discharge effect is not satisfactory, but it cannot meet the requirements for the situation of fracturing sand cementation or gas well blockage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1, complete choke fishing in Well Su 36-11-16H. The construction related parameters of Well Su 36-11-16H are as follows, well type-diameter; choke model to be salvaged-CQXD-71; gas tree type-standard gas tree, fishing depth 1497m, tubing specification 3 1 / 2, The casing pressure is 3.44MPa.

[0011] The pump-type sand drum is a pump-type tool that works according to the principle of a conventional pump and piston; when sand is deposited on the top of the downhole equipment and prevents normal fishing, the sand drum is lowered to clean the fracturing sand.

[0012] When working, the upper joint is lifted up, and the piston rod and piston connected to it move upward together. At this time, the steel ball moves upward, and the sand in the well is pumped up; when the upper joint is lowered, the steel ball falls and sits in the hole of the shoe. , the sand pumped up is blocked by steel balls and retained in the barrel, pumped back and forth in this way until the rock...

Embodiment 2

[0027] Example 2, complete choke fishing in Well Su 36-16-13H2. The construction related parameters of Well Su 36-16-13H2 are as follows, well type-diameter; choke model to be salvaged-RD-71; gas tree model-KQ65 / 105, gas tree type-standard gas tree, fishing depth 1557m, tubing specification 3 1 / 2, casing pressure 3.44MPa.

[0028] On October 23, 2013, Piberic successfully launched the RD-71 throttle

[0029] On October 18, 2016, Pebrick failed to salvage the restrictor. At 1548 meters, the restrictor could not be caught. The oil stain and the central rod deviation were found by printing.

[0030] On July 16, 2018, the choke in Su 36-16-13H2 well was salvaged using the technical solution described in the present invention.

[0031] Arrive at the well site at 8:50, hold a pre-shift meeting, conduct safety education and training, arrange the construction site, and apply for a start-up permit.

[0032] 9:30 Wellhead blowout pipe pressure test.

[0033] 10:00 Start the well, to...

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PUM

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Abstract

The invention belongs to the technical field of oil and gas exploitation, and particularly relates to a salvage method for a throttle buried and stuck by fracturing sand. The method comprises the following steps that firstly, drifting is conducted, and the depth of the throttle is judged; next, a lead printing tool string combination is discharged, and the fracturing sand condition is judged; next, a sand salvage tool string combination is discharged to replace the lead printing tool string combination, sand salvage operation is conducted till sand salvage is completed, and a lead mark is judged to be a throttle salvage neck; and finally, a salvage socket tool string combination is lowered, and the throttle is grabbed to be continuously lifted and vibrated, until salvage of the throttle iscompleted. Therefore whether the underground belongs to the fracturing sand burying or not is judged more simply and accurately, the fracturing sand salvage efficiency is higher, and the throttle buried and stuck by the fracturing sand can be salvaged more effectively.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploitation, and in particular relates to a fishing method for burying a jammed flow restrictor with fracturing sand. Background technique [0002] At present, in the complex processing operation of downhole problematic chokes, there are few publications in the prior art for the salvage method of fracturing sand buried stuck chokes, only retrieved, and published in the collection of the 8th Ningxia Young Scientists Forum , it is mentioned in the exploratory application of coiled tubing technology on salvage chokes that when sand chokes in gas wells are buried by fracturing sand, sand can be discharged by wellhead discharge. However, this discharge method It can only meet the sand discharge under the normal operation of the gas well restrictor, and its discharge effect is not satisfactory, but it cannot meet the requirements for the situation of fracturing sand cementation or gas well blockage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/00E21B47/09E21B47/098E21B27/00E21B31/16E21B31/107
Inventor 董成利赵祯张力张涛
Owner 咸阳荣达石油技术服务有限公司
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