CN110700776A - Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device - Google Patents

Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device Download PDF

Info

Publication number
CN110700776A
CN110700776A CN201910970033.1A CN201910970033A CN110700776A CN 110700776 A CN110700776 A CN 110700776A CN 201910970033 A CN201910970033 A CN 201910970033A CN 110700776 A CN110700776 A CN 110700776A
Authority
CN
China
Prior art keywords
gas
filling
drilling
hollow
pipeline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910970033.1A
Other languages
Chinese (zh)
Inventor
敬俊
祝效华
汤历平
王成涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest Petroleum University
Original Assignee
Southwest Petroleum University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southwest Petroleum University filed Critical Southwest Petroleum University
Priority to CN201910970033.1A priority Critical patent/CN110700776A/en
Publication of CN110700776A publication Critical patent/CN110700776A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/14Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/001Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure

Abstract

The invention discloses a multi-gradient riser gas-filling-hollow ball-filling drilling method and a multi-gradient riser gas-filling-hollow ball-filling drilling device, which mainly comprise a water tap, a slurry pump, a drilling platform, a hollow ball-filling pipeline, a gas-filling pipeline, a hollow ball concentrator, a seawater discharge pipeline, an auxiliary injection pipeline, an in-well nozzle, a casing pipe, a drill bit, a blowout preventer, a riser and a drill column; the gas-hollow ball injection holes arranged at different positions in the marine riser and the shaft realize multi-point injection, so that the gas or hollow ball and the drilling fluid are mixed more uniformly, and the accident probability is reduced by ensuring the safety of drilling construction.

Description

Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device
Technical Field
The invention relates to an oil drilling device, in particular to a multi-gradient marine riser gas-filled-injected hollow sphere drilling method and device, and belongs to the technical field of mechanical engineering or oil-gas engineering.
Background
The ocean covers the area of the earth 3/4, and contains extremely abundant oil and gas resources. Gulf of mexico, north sea, north africa, brazil and south china sea areas are all important arenas for the development of marine oil resources. With the progress of scientific technology and the continuous improvement of the cognitive level of human beings on marine oil resources, the offshore oil exploration and development have been developed from conventional water depth (less than 500m) to deep water (500 m-1500 m) and ultra-deep water (more than 1500m), and the development of deep water oil and gas fields is becoming a main growth point of the world oil industry and a hotspot of world technological innovation. The main problem of deep sea drilling at present is that it is difficult to control the bottom hole drilling pressure between the pore pressure and the fracture pressure of rock stratum, and according to the situation, in the last 90 th century, many foreign oil companies developed and used dual-gradient drilling technology to solve the world problem.
The methods for realizing dual-gradient drilling in the industry at present mainly include drilling without a marine riser, lifting drilling fluid by a subsea pump and dual-density drilling. The sea-bottom pump type and the driving power used in the method for lifting the drilling fluid by the sea-bottom pump can be divided into three types, namely a sea-water driving diaphragm pump, an electric driving centrifugal pump and an electric submersible pump. The dual density drilling is divided into the following according to the injected fluid: and 3 methods of injecting hollow spheres, injecting gas and injecting low-density fluid. The riser may or may not be used in drilling with the subsea pump lift drilling fluid. The dual density drilling method requires a riser and a subsea pump, thereby greatly reducing the number of subsea devices. Further, the above methods may be used in combination, as required.
Disclosure of Invention
The invention aims to provide a method and a device for realizing double-gradient drilling for deep-sea oil drilling in China, which are used for solving the problem of narrow safety density window of deep-sea drilling.
The technical scheme adopted by the invention is as follows:
a multi-gradient riser gas-filling-hollow ball-filling well drilling method and a device thereof mainly comprise a water tap, a slurry pump, a well drilling platform, a hollow ball filling pipeline, a gas filling pipeline, a hollow ball concentrator, a seawater discharging pipeline, an auxiliary filling pipeline, an in-well nozzle, a sleeve, a drill bit, a blowout preventer, a riser and a drill column; the device is characterized in that the hollow ball and gas are respectively conveyed to a hollow ball centralizing device positioned on a seabed mud line through a hollow ball injection pipeline and a gas injection pipeline, and when the hollow ball reaches the hollow ball centralizing device, the hollow ball is separated from hollow ball conveying liquid (the hollow ball conveying liquid is mostly seawater), and the hollow ball and the gas are injected into the annulus of a riser through high-pressure gas; an auxiliary injection pipeline is arranged in the well, gas and hollow spheres can reach the well through the auxiliary injection pipeline, an in-well nozzle is arranged in a certain distance, and the gas injection amount of different well depths can be changed by adjusting the in-well nozzle, so that the density of drilling fluid of different well depths can be regulated and controlled to meet the drilling requirement; the hollow spheres and the gas injected into the annular space finally return to the drilling platform under the action of the drilling fluid, and then are separated from the drilling fluid and recycled.
Compared with the prior art, the invention has the beneficial effects that: (1) through arranging the gas injection-hollow ball holes at a plurality of point positions, the gas or hollow ball and the drilling fluid are uniformly mixed, and the probability of drilling accidents is reduced; (2) two low-density media of a hollow ball and gas can be injected to adjust the density of the drilling fluid, and the pressure regulation and control are more accurate under the action of a plurality of injection points.
Drawings
Fig. 1 is a schematic structural diagram of a multi-gradient marine riser gas-filled-hollow ball drilling method and device.
In the figure: 1. the water-saving drilling rig comprises a water faucet, 2 a slurry pump, 3 a drilling platform, 4 a hollow ball injection pipeline, 5 a gas injection pipeline, 6 a hollow ball centralizing device, 7 a seawater removal pipeline, 8 an auxiliary injection pipeline, 9 an in-well nozzle, 10 a casing, 11 a drill bit, 12 a blowout preventer, 13 a water-resisting pipe and 14 a drill string.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a multi-gradient riser gas-filling-hollow ball drilling method and device mainly comprise a water tap 1, a mud pump 2, a drilling platform 3, a hollow ball filling pipeline 4, a gas filling pipeline 5, a hollow ball centralizing device 6, a seawater discharging pipeline 7, an auxiliary filling pipeline 8, a well nozzle 9, a casing 10, a drill bit 11, a blowout preventer 12, a riser 13 and a drill string 14; the method is characterized in that the hollow spheres and gas are respectively conveyed to a hollow sphere concentration device 6 positioned on a seabed mud line through a hollow sphere injection pipeline 4 and a gas injection pipeline 5, when the hollow spheres reach the hollow sphere concentration device 6, the hollow spheres are separated from hollow sphere conveying liquid (the hollow sphere conveying liquid is mostly seawater), and the hollow spheres are injected into the annular space of a marine riser 13 through high-pressure gas; an auxiliary injection pipeline 8 is arranged in the well, gas and hollow spheres can reach the well through the auxiliary injection pipeline 8, an in-well nozzle 9 is arranged in a certain distance, and the gas injection amount of different well depths can be changed by adjusting the in-well nozzle 9, so that the drilling fluid density of different well depths can be regulated and controlled to meet the drilling requirement; the hollow spheres and the gas injected into the annular space finally return to the drilling platform under the action of the drilling fluid, and then are separated from the drilling fluid and recycled.
The above-described embodiments are intended to be illustrative of the present patent and not to limit the scope of the patent, and any equivalent changes and modifications that may be made by one skilled in the art without departing from the spirit and principles of the patent are intended to be covered by the present patent system.

Claims (1)

1. A multi-gradient riser gas-filling-hollow ball-filling well drilling method and a device mainly comprise a water tap (1), a slurry pump (2), a well drilling platform (3), a hollow ball filling pipeline (4), a gas filling pipeline (5), a hollow ball centralizing device (6), a seawater discharging pipeline (7), an auxiliary filling pipeline (8), an in-well nozzle (9), a casing (10), a drill bit (11), a blowout preventer (12), a riser (13) and a drill string (14); the device is characterized in that the hollow spheres and gas are respectively conveyed to a hollow sphere concentration device (6) positioned on a seabed mud line through a hollow sphere injection pipeline (4) and a gas injection pipeline (5), when the hollow spheres reach the hollow sphere concentration device (6), the hollow spheres are separated from hollow sphere conveying liquid (the hollow sphere conveying liquid is mostly seawater), and the hollow spheres are injected into the annulus of a riser (13) through high-pressure gas; an auxiliary injection pipeline (8) is arranged in the well, gas and hollow spheres can reach the well through the auxiliary injection pipeline (8), an in-well nozzle (9) is arranged in a certain distance, and the gas injection amount of different well depths can be changed by adjusting the in-well nozzle (9), so that the drilling fluid density of different well depths can be adjusted and controlled to meet the drilling requirement; the hollow spheres and the gas injected into the annular space finally return to the drilling platform under the action of the drilling fluid, and then are separated from the drilling fluid and recycled.
CN201910970033.1A 2019-10-12 2019-10-12 Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device Pending CN110700776A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910970033.1A CN110700776A (en) 2019-10-12 2019-10-12 Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910970033.1A CN110700776A (en) 2019-10-12 2019-10-12 Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device

Publications (1)

Publication Number Publication Date
CN110700776A true CN110700776A (en) 2020-01-17

Family

ID=69198752

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910970033.1A Pending CN110700776A (en) 2019-10-12 2019-10-12 Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device

Country Status (1)

Country Link
CN (1) CN110700776A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1446286A (en) * 2000-06-08 2003-10-01 毛勒技术公司 Multi-gradient drilling method and system
CN1650090A (en) * 2002-09-27 2005-08-03 华科I/P有限公司 System to reduce hydrostatic pressure in risers using buoyant spheres
US20080302569A1 (en) * 2001-02-15 2008-12-11 Deboer Luc Dual Gradient Drilling Method And Apparatus With An Adjustable Centrifuge
CN108425649A (en) * 2018-03-28 2018-08-21 中国石油大学(北京) Drilling fluid density is segmented regulation device
CN108457642A (en) * 2018-01-25 2018-08-28 中国石油大学(北京) A kind of more gradient pressure test devices of pit shaft

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1446286A (en) * 2000-06-08 2003-10-01 毛勒技术公司 Multi-gradient drilling method and system
US20080302569A1 (en) * 2001-02-15 2008-12-11 Deboer Luc Dual Gradient Drilling Method And Apparatus With An Adjustable Centrifuge
CN1650090A (en) * 2002-09-27 2005-08-03 华科I/P有限公司 System to reduce hydrostatic pressure in risers using buoyant spheres
CN108457642A (en) * 2018-01-25 2018-08-28 中国石油大学(北京) A kind of more gradient pressure test devices of pit shaft
CN108425649A (en) * 2018-03-28 2018-08-21 中国石油大学(北京) Drilling fluid density is segmented regulation device

Similar Documents

Publication Publication Date Title
CN101070755B (en) Pressure-control well-drilling device based two gradients
AU2015303853B2 (en) Curaua fibers as lost-circulation materials and fluid-loss additives in wellbore fluids
CN100412311C (en) Method and apparatus for realizing double-gradient well drilling
US20130037272A1 (en) Method and system for well access to subterranean formations
CN201059187Y (en) Pressure-control drilling device based on double gradient
CN102155187A (en) Method for treating coal bed bottom plate karst water through hydraulic jetting and radial drilling
CN102080510A (en) Submarine mud suction system and method for realizing marine riser-free mud reclamation well drilling
US20170058646A1 (en) Deepwater extended reach hardrock completions
CN201963231U (en) Subsea mud suction system for realizing riser-free mud recovery drilling
CN106368607A (en) System and method for conducting well killing in deepwater dual gradient drilling
CN107355205A (en) A kind of hydraulic slotted liner technique method of semisubmersible drilling platform or drill ship
AU2019202100B2 (en) Drilling fluid density segmented regulation device
CN102155163B (en) Deepwater multifunctional water pump drilling system and installation method thereof
CN110700776A (en) Multi-gradient marine riser gas-filling-hollow ball-injecting well drilling method and device
AU2019202097B2 (en) Drilling fluid density online regulation device
CN200971760Y (en) Device for implementing double-gradient drilling
CN105257261B (en) The non-diagenesis in sea area and diagenesis gas hydrates fluidize pilot production method
CN105422054B (en) Sea area diagenesis gas hydrates pilot production method
US8833463B2 (en) Above mudline whipstock for marine platform drilling operations
CN103459756A (en) Gravity based fluid trap
Tercan Managed pressure drilling techniques, equipment & applications
CN201851006U (en) Device for vertically boring holes on concrete with high precision
CN202000892U (en) Multi-functional deep-water undersea pump drilling system
CN108086924A (en) A kind of method that deepwater drilling platform suspension marine riser moves well location
CN208900028U (en) A kind of double-gradient well drilling system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination