This is a present perfect tense but in wrong construction. The present perfect construction is Has/have+past particple. I made this mistake once, when I was twelve. It's because typical verbs have same past and past participle forms. But, become is an irregular verb, became is past tense and become is past participle.

2019年7月1日 · However, if you use the present tense, the correct conjugation is becomes, not become. So: Observe the poor man who became so. Observe the poor man who becomes so. Both of those tenses are correct. There are also other variations: had become, has become, will become, was becoming, is becoming, will be becoming, and so on.

2023年7月29日 · That is, suppose you want to talk about events that happened in 2000, 2010, and 2015. You are writing in 2023. You could refer to them all in the past tense. But this could get confusing. But if you use an historical present and set yourself in 2010, then 2010 is the present tense, 2000 is the past, and 2015 is the future.

2015年1月23日 · The phrase over the past few years describes a period of time. It seems to me that verbs that can be seen as a one-time event, such as "became", do not work so great in the proposed sentence:?*Reality shows became very popular over the past few years.?*Germany won the World Cup over the past few years.?*She went on a diet over the past few years.

So it doesn't matter which tense you will use after "wells", because it's merely a description of "wells" - you are not handcuffed here. I'm 100% negative about "Have Become" - because it means that "wells" "have become" mudded-up once in the past and not during every drilling/workover proccess.

2015年4月11日 · The "simple past tense" is often used to describe situations that have occurred in the past. The present-perfect construction has within it two tenses: a primary present-tense, and a secondary past-tense (the perfect). And so, the present-perfect can be used to involve two time spheres: the past time and the present time; and it is often used ...

2017年10月1日 · Reporting the direct speech we follow the rule of "one tense back". Since that we are able to use Past Perfect instead of Past Simple as well as leave it the same. The Past Perfect tense stays the Past Perfect. I saw the we can leave the Past Continuous the same. I found the example where it becomes Past Perfect Continuous, though. Example:

2023年8月28日 · I have become happy. This means that I was unhappy, but at a point in the past I changed to happy, and I remain happy through to now. (Compare the sentence "I became happy", which refers to the moment when I changed, but says nothing about whether I am still happy.) I have been happy. This means that I was happy at one or more times in the past.

2020年8月15日 · Cambridge "future-in-the-past" When we talk about the past, we sometimes want to refer to something which was in the future at the time we were speaking. We use past verb forms to do this: (emphasis added) That and other sites use examples with the word "would", but just as "would" is the past tense of "will", "might" is the past tense of "may".

Past tense. "when Tom went [was going, would go, used to go] to high school."? 3. Can the past tense be ...