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Particles comprising blocked isocyanate resin and method of modifying wellbore using same

An isocyanate resin, wellbore technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of reduced wellbore diameter, high cost, time consumption, etc.

Inactive Publication Date: 2013-12-25
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technique of bonding tubing in the wellbore has several disadvantages as drilling progresses, including the time and expense incurred in placing and sealing the tubing, and the reduction in wellbore diameter at each casing depth

Method used

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  • Particles comprising blocked isocyanate resin and method of modifying wellbore using same
  • Particles comprising blocked isocyanate resin and method of modifying wellbore using same
  • Particles comprising blocked isocyanate resin and method of modifying wellbore using same

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Experimental program
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preparation example Construction

[0070] The method of making a plurality of particles according to the present invention can also be used, for example, to tailor a plurality of particles or fluid compositions to selected geological regions of a subterranean formation. Data including target depths and temperatures for the geological region can be used to generate a formulation comprising a thermoplastic composition and a curable resin. Some typical data containing target depths and temperatures for geological formations are shown in figure 1 , where the discontinuous line indicates the typical temperature attainable at a certain depth. The thermoplastic composition may be selected based at least in part on its softening temperature being lower than the temperature in the geological region based on its viscous flow suitable for the temperature in the geological region. The selection of a blocked isocyanate resin may be based, at least in part, on its deblocking temperature being lower than the temperature in ...

example

[0110] softening temperature

[0111] The softening temperature of the thermoplastic composition was measured using a stress-controlled rheometer (model AR2000, manufactured by TA Instruments (New Castle, DE)) according to the following procedure.

[0112] The thermoplastic material was placed between two 20 mm parallel plates of the rheometer and pressed to a gap of 2 mm to ensure complete coverage of the plates. Then, a sinusoidal frequency of 1 Hz was applied at 1% strain in the temperature range of 60–200 °C. The relationship of molten resin resistance to sinusoidal strain is proportional to its modulus, which is recorded by the sensor and displayed in a graphical format. Using rheometer software, this modulus is mathematically divided into two parts: a part that is in phase with the applied strain (elastic modulus - solid-like behavior), and a part that is in phase with the applied strain (viscous modulus - liquid-like behavior). Behavior) the other part out of phase....

example 1

[0115] The first material was a polyamide resin available under the trade designation "ELVAMIDE 8066" from E.I. du Pont de Nemours (Wilmington, DE).

[0116] The second material was a blocked isocyanate resin available from Degussa Corporation, Parsippany, NJ under the trade designation "VESTAGON EP BF 9030".

[0117] The first and second materials are each ground to a particle size range of 200 to 3000 microns using a cryogenic mill.

[0118] For Example 1, the powders of the first and second materials were combined in a 50 / 50 weight ratio.

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Abstract

A plurality of solid particles including a thermoplastic composition having a softening temperature in a range from 50 °C to 180 °C and a blocked isocyanate resin; optionally at least some of the particles in the plurality of solid particles comprise both the thermoplastic composition and the blocked isocyanate resin. A composition comprising the plurality of particles dispersed in a fluid is also disclosed. A method of modifying a wellbore within a geological formation is also disclosed. The method includes introducing the fluid composition into the wellbore. A method of making a plurality of particles, for example, to use in the fluid composition, is also disclosed.

Description

[0001] Cross references to related patent applications [0002] This patent application claims priority to US Provisional Patent Application No. 61 / 140428, filed December 23, 2008, the disclosure of which is incorporated herein by reference in its entirety. Background technique [0003] Rotary drilling is often used to drill oil and gas wells. Typically, a wellbore extending from the surface into one or more subterranean oil and / or gas producing formations is drilled by a rotary drilling rig at the surface that turns a drill bit connected to a string of drill pipe. The drill bit includes a rotatable cutting surface such that a borehole is created when the drill bit is turned under pressure by the drill string against the subterranean formation. [0004] Typically, drilling fluid is circulated down the drill string, through the drill bit and up the annulus between the wellbore wall and the drill string wall. The drilling fluid functions to maintain hydrostatic pressure in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/34C08G18/42C08G18/44C08G18/60C08G18/62C08G18/80C08L75/02C08L75/04C09K8/42C09K8/44C09K8/50C09K8/506C09K8/508C09K8/512
CPCC08G18/622C09K8/035C08G18/42C08L75/04C08G18/8061C08L75/02C08G18/348C08G18/60C09K8/80C09K8/56C08G18/44C08L2666/02C08L2666/14C08L2666/04
Inventor 迈克尔·D·克兰德尔伊格内修斯·A·卡多马克拉拉·E·玛塔吴永康
Owner 3M INNOVATIVE PROPERTIES CO