可降解颗粒包括在用于地下应用如钻井中能进行不可逆降解的可降解材料(其通常是可降解聚合物)，此处所使用的术语一种颗粒或多种颗粒是指具有以下物理形状的一种或多种微粒薄层(platdet)、刨花(shavings)、纤维、小薄片(flake)、带状、棒、条、球体、超环状、小球状、片(tablet)或其它合适形状的。

Degradable particles include degradable materials (usually degradable polymers) that can be irreversibly degraded in underground applications such as drilling. The term one particle or multiple particles used here refers to one or more thin particle layers, shavings, fibers, flakes, belts, rods, strips, spheres, super rings, small spheres, tablets or other suitable shapes with the following physical shapes.

作为此处所使用的术语不可逆，意指可降解材料可原位降解(例如在钻井中)，但降解之后不会原位(例如在钻井中)重结晶或重新固结。

As the term used herein is irreversible, it means that degradable materials can be degraded in situ (e.g. in drilling), but will not recrystallize or reconsolidate in situ (e.g. in drilling) after degradation.

可降解指可降解材料可以进行诸如异相(或本体消耗)和均相(表层消耗沐解降解的两种相对极端情形，以及在这两者之间的任意降解阶段。这种降解可以尤其是由化学或热反应或辐射引发的反应中所产生的。

Degradability refers to the two relatively extreme situations of degradable materials, such as heterogeneous (or bulk consumption) and homogeneous (surface consumption) degradation, and any degradation stage between them. This degradation can be especially caused by chemical or thermal reaction or radiation induced reaction.

作为此处所用术语一种聚合物或多种聚合物并不暗示特定聚合度，例如，此定义还包括低聚物。可降解聚合物的可降解度通常少部分地取决于其骨架结构。例如：

As the term is used herein, a polymer or polymers do not imply a specific degree of polymerization, for example, this definition also includes oligomers. The degree of degradability of degradable polymers usually depends at least in part on their skeleton structure. For example:

在骨架中存在的可水解和/或可氧化的键通常能产生可以如下所述进行降解的材料。这些聚合物的降解速率取决于重复单元的类型、组成、序列、长度、分子几何形状、分子量、形态(例如结晶度、球晶尺寸以及取向度)、亲水性、疏水性、表面积和添加剂。

Hydrolyzable and/or oxidable bonds present in the skeleton can generally produce materials that can be degraded as described below. The degradation rate of these polymers depends on the type, composition, sequence, length, molecular geometry, molecular weight, morphology (such as crystallinity, spherulite size, and orientation), hydrophilicity, hydrophobicity, surface area, and additives of the repeating units.

另外，该聚合物所处环境如温度、水分的存在、氧气、微生物、酶、pH等会影响其如何降解。更多相关内容就来我们网站http://www.1958666.com咨询了解吧！

In addition, the environment of the polymer, such as temperature, the presence of water, oxygen, microorganisms, enzymes, pH, etc., will affect how it is degraded. More relevant content will come to our website http://www.1958666.com Ask and understand!