Workover Operation Method for Low Permeability and Water Sensitive Oil Wells
A technology for oil wells and workovers, which is applied in wellbore/well components, earthwork drilling, drilling equipment, etc., and can solve problems such as the long shutdown time of midway shutdown and the inability to shut down wells in time due to oil spill at the wellhead
Active Publication Date: 2020-11-27
CHINA PETROCHEMICAL CORP +2
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The purpose of the present invention is to overcome the problems existing in the prior art, and provide a workover operation method for low-permeability water-sensitive oil wells, which can solve the problem of excessive shutdown time and wellhead overflow in the process of lifting sucker rods during downhole operations. The problem of not being able to shut down the well in time during oil production
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] The workover operation method of the low-permeability water-sensitive oil well of the present invention comprises the following steps in turn: (1) After hanging the elevator one with the sucker rod hook, hang the upper part of the polished rod with the elevator one, and put the oil production three on the wellhead Christmas tree (2) Lift up the polished rod until the upper end of the first sucker rod exposes the oil production tee, and then use the second elevator to clamp it under the upsetting flange of the first sucker rod, and the hook of the sucker rod Use the second elevator on the oil production tee for the downward movement; ⑶ remove the polished rod, move the polished rod to level, then the hook of the sucker rod is separated from the first elevator, and remove the first elevator from the polished rod; ⑷ use the sucker rod After hanging Elevator 2 on the hook, lift up the hook of the sucker rod until the upper end of the second sucker rod exposes the oil product...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a workover operation method of a low permeability and water-sensitive oil well. The workover operation method of the low permeability and water-sensitive oil well comprises the steps of detaching one part above an oil extraction three way first under cooperation of a lifting hook and a lifting clip; lifting a polish rod upwards to clamp a first sucker rod and then detaching the polish rod; after lifting a sucker rod lifting hook upwards to clamp a second sucker rod, detaching the first sucker rod; after lifting the sucker rod lifting hook to clamp a third sucker rod, detaching the second sucker rod and so on. When a blowout omen appears, a sucker rod suspender is is rotationally connected above a wellhead sucker rod; a sucker rod short section is rotationally connected above the sucker rod suspender so that the sucker rod suspender lies on an upper port of an oil pipe joint and then the sucker rod short section is detached; a conventional well-flushing hole passage of the sucker rod suspender is opened, and then an oil pipe lifting short section is rotationally connected to a conical suspender and lifted upwards to unblock a conventional well-flushing passage of an anchorage oil bleeder; and then a certain quantity of kill fluid is forwardly replaced to control blowout so that a wellhead is stable. According to the workover operation method of the low permeability and water-sensitive oil well, the problems that the well cannot be closed in time and a well killing polluted oil reservoir cannot be back-flushed in time during blowout can be solved.
Description
technical field [0001] The invention relates to a workover tool, in particular to a workover operation method for low-permeability water-sensitive oil wells, and belongs to the technical field of workover tools. Background technique [0002] The donkey's head of the beam pumping unit is driven by the rope braid, polished rod and sucker rod to drive the plunger of the downhole oil pump to move up and down, so as to continuously pump the crude oil out of the wellbore. The connection between the rope hanger and the sucker rod is realized through the polished rod. The polished rod is located at the uppermost part of the sucker rod. The polished rod cooperates with the packing in the blowout prevention box to seal the wellhead. The sucker rod is inserted into the tubing, the tubing is located in the casing, the upper port of the casing is installed with a wellhead cross above the ground, the upper end of the tubing string is connected with a tubing joint, and the tubing joint is ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B19/02E21B19/06E21B23/01E21B33/04E21B43/12
CPCE21B19/02E21B19/06E21B23/01E21B33/04E21B43/127
Inventor 汪云鹤陈敬胡相嵩符登军张鑫杜红
Owner CHINA PETROCHEMICAL CORP