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A method for quickly changing tool strings and wellheads in conjunction with bridge plug perforation under pressure

A technology of tool strings and bridge plugs, which is applied in the field of rapid replacement of tool strings and wellheads in conjunction with bridge plug perforation under pressure, which can solve the problems of time-consuming and labor-consuming, and achieve simple replacement of wellheads and tool strings and maximum construction efficiency Minimize and avoid the effect of working at heights and under pressure

Active Publication Date: 2021-08-03
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the time-consuming and labor-intensive process of the existing pressurized bridge plug perforation combined tool string and wellhead replacement process, and also involve high-altitude, high-pressure operation risks, the purpose of the present invention is to provide a pressurized bridge plug perforation. The method of quickly changing tool strings and wellheads with hole joints helps to reduce the construction strength of bridge plug perforation joint operations under pressure, enhance the construction safety of bridge plug perforation joint operations under pressure, and improve the pressure of bridge plug perforation joint operations. Construction time limit

Method used

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  • A method for quickly changing tool strings and wellheads in conjunction with bridge plug perforation under pressure
  • A method for quickly changing tool strings and wellheads in conjunction with bridge plug perforation under pressure
  • A method for quickly changing tool strings and wellheads in conjunction with bridge plug perforation under pressure

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0040]The method of the present invention for the rapid replacement of the tool string and the wellhead for bridge plug perforation with pressure is as follows: the plug-in wellhead device is connected between the wellhead 10 and the cable blowout preventer 6, and connected at the top of the tool string 4 The flexible fishing head 13 of the protection cable is installed at the bottom to protect the bridge plug and support the support wheel seat 3 of the tool string. Through the remote control of the plug-in wellhead device, the automatic connection and separation of the cable blowout pipe 6 and the wellhead 10 can be directly realized; at the same time, the cable blowout pipe 6 and the tool string 4 can be hoisted close to or separated from the wellhead 1 through the cooperation of the crane 8 and the winch 1 Wellhead. Utilize the flexible salvage head 13 to protect...

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Abstract

A method for rapid replacement of tool strings and wellheads in combination with bridge plug perforation. The plug-in wellhead device is connected between the wellhead and the cable lubricator, and the female connector can be connected to the male through the hydraulic control system. The locking and unlocking action of the connector; through the remote control of the hydraulic control system, the automatic connection and disengagement of the cable lubricator and the wellhead are realized; Take off the tool string in the vertical state and change it. The invention does not require workers to manually change the wellhead, and does not need to consume a lot of manpower to drag the tool string from the cable blowout pipe, which can reduce the number of operators by at least 3-4, and it is simpler and easier to change the wellhead and tool string. The invention directly realizes the automatic refitting of the cable blowout preventer wellhead through remote hydraulic control, avoids the link of inverting and erecting the cable blowout preventer, and speeds up the refitting of the wellhead and tool string by at least 50% compared with the original method, which is more efficient.

Description

technical field [0001] The invention relates to the field of perforation and well completion, in particular to a method for quickly changing tool strings and wellheads in conjunction with bridge plug perforation under pressure. Background technique [0002] Large-scale staged fracturing technology is a key technology for the development of low-porosity and low-permeability unconventional oil and gas resources such as shale gas and tight oil and gas, and the combined technology of bridge plug and perforation under pressure is an important part of it. Under pressure bridge plug perforation joint operation means that under the premise of effective communication between the wellbore and the formation, the bridge plug and perforation tool string are transported to the downhole target layer through hydraulic pumping by means of cable transmission, and the bridge plug setting and perforation are completed. Multi-cluster perforation realizes downhole stratum segmentation and forms c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B19/00E21B33/06E21B23/00E21B43/11E21B33/134
CPCE21B19/00E21B23/00E21B33/06E21B33/134E21B43/11
Inventor 唐凯陆应辉陈建波张清彬任国辉许嘉乐李奔驰唐勤
Owner BC P INC CHINA NAT PETROLEUM CORP
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