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Combined method of tubing under balance, snubbing gas lift, shaft pumping and pump inspection

An underbalanced, tubing technology, applied in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problems of unobstructed production channels, uplifted operation cycle, weakened reservoir protection effect, etc., to simplify the production operation, The effect of improving competitiveness and maintaining the effect of increasing production capacity

Active Publication Date: 2015-09-02
CNPC XIBU DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The present invention provides a joint operation method of under-balanced tubing, snubbing gas lift, pumping and pump inspection, which overcomes the shortcomings of the above-mentioned prior art , which can effectively solve the problems in the production process that the production channel is not smooth, the operation cycle is raised, and the independent operations weaken the reservoir protection effect

Method used

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  • Combined method of tubing under balance, snubbing gas lift, shaft pumping and pump inspection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: The under-balanced tubing, snubbing gas lift, pumping, and pump inspection are combined as follows: The first step is to fix and install the tubing string 1 from top to bottom. In-line blowout preventer 2 and basket 3, fixedly install the valve holder in the oil pipe blowout preventer 2, install the valve in the valve holder, and install no less than one reverse gas lift valve in the middle of the oil pipe string 1. 4. Fix the pump seat 12 on the lower inner side of the tubing string 1, fix the pump sealer 13 at the lower end of the pump seat 12, and fix the pump seal valve on the pump sealer 13, fix the upper end of the casing 5 on the wellhead, and extract oil The four-way 6 is fixedly installed on the casing 5 above the wellhead, in which: the starting pressure of the reverse gas lift valve 4 is set to be greater than the pressure of the liquid column running into the well; the second step is to run the tubing string 1 into the casing In step 5, the upper ...

Embodiment 2

[0019] Embodiment 2: As an optimization of the above-mentioned embodiment, the blowout prevention device 2 in the tubing is a ball-throwing holding pressure open tubing constant-pressure float valve, the valve fixing seat is a valve core, and the valve is installed on the valve core. In the third step, Put a crappy ball into the ball-suppressing-open tubing constant-pressure float valve to block the spool diversion channel in the ball-squeezing-open tubing constant-pressure float valve, and inject into the tubing string 1 through the Christmas tree 7 The fluid is held in pressure, and the spool of the ball-throwing holding pressure open tubing constant pressure float valve and the valve on the spool are sent into the basket 3 together, and the tubing string 1 is connected to the well through the through hole 8 on the basket 3 to establish production aisle. The pitch holding pressure open tubing constant pressure float valve adopts the technology in the Chinese patent document ...

Embodiment 3

[0020] Embodiment 3: The difference from the above embodiment is that in the sixth step, after the overhaul of the sucker pump 11 is completed, the sucker pump 11 is fixedly installed at the lower end of the sucker rod 10, and the sucker pump 11 is fixedly installed at the lower part of the sucker rod 10 Open the pump core tube 9, and then lower the sucker rod 10 into the tubing string 1, the sucker pump 11 is seated on the pump seat 12, and then the sucker pump 11 and the pump seat 12 perform bumping operations, and turn on the pump while bumping the pump. The core tube 9 stabs the valve of the pump, and the valve of the pump is in an open state, so that the pump 11 and the pump 13 are communicated with the lower end of the tubing string 1, and a pumping channel is established for pumping operations.

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Abstract

The present invention relates to the technical field of underbalanced well completion operation and oil production operation, and is a joint operation method of underbalanced oil pipe, snubbing gas lift, pumping transfer and pump inspection, which is carried out as follows: first step, in the oil pipe The bottom end of the column is fixedly installed in the oil pipe blowout preventer and the basket in order from top to bottom, the valve fixing seat is fixed in the oil pipe blowout preventer, and the valve is installed in the valve fixing seat. The invention fixedly installs the blowout prevention device in the tubing at the bottom of the tubing string, not only can successfully complete the tubing running operation in the well completion stage, but also can establish a gas lift drainage or production channel during the gas lift production process, and can make the tubing run Operation, gas lift production operation, oil pumping operation and oil pump maintenance operation are closely combined, which shortens the operation cycle, simplifies the production operation, and strengthens the reservoir protection effect of underbalanced drilling, so that oil and gas wells can be put into production in time and maintain a good productivity increase effect, thereby improving the competitiveness of under-balanced technologies.

Description

technical field [0001] The invention relates to the technical field of underbalanced well completion operation and oil production operation, and relates to a combined method of underbalanced down tubing, snubbing gas lift, pumping transfer and pump inspection. Background technique [0002] At present, in wells drilled with underbalanced technology, when the tubing is run in the well completion stage, a tubing check valve and constant pressure valve are generally installed at the bottom of the tubing string to prevent the fluid in the well from ejecting from the tubing during the running of the tubing. Install a reverse gas lift valve at an appropriate position of the tubing string. After the tubing string is seated, positive circulation suppresses the pressure to open the inner channel of the tubing to realize the connection of the oil sleeve and establish a gas lift drainage or production channel. In the actual process, there is a cycle dead zone in the application process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B33/03E21B47/008
Inventor 张彦龙杨勇胡挺吴振华孙新江宗泽斌
Owner CNPC XIBU DRILLING ENG
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