"downhole" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "down",
        "3": "hole"
      },
      "expansion": "down- + hole",
      "name": "prefix"
    }
  ],
  "etymology_text": "down- + hole",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective"
      },
      "expansion": "downhole",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with down-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Oil industry",
          "orig": "en:Oil industry",
          "parents": [
            "Industries",
            "Petroleum",
            "Business",
            "Fossil fuels",
            "Liquids",
            "Economics",
            "Society",
            "Carbon",
            "Energy",
            "Natural resources",
            "Matter",
            "Social sciences",
            "All topics",
            "Carbon group elements",
            "Nature",
            "Chemistry",
            "Sciences",
            "Fundamental",
            "Chemical elements"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2005, Paul Carter, Don't Tell Mum I Work on the Rigs, Crows Nest: Allen and Unwin, page 44",
          "text": "In the work over, part of the new \"string\" was a down-hole titanium gauge.",
          "type": "quotation"
        },
        {
          "ref": "2015, Ronald DiPippo, Geothermal Power Plants",
          "text": "Pressure readings are taken downhole next to the feed zone and the total flow is measured on the surface using a separator.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Located in the drilled bore of an oil well either underground or undersea."
      ],
      "id": "en-downhole-en-adj-JN9v2xBg",
      "links": [
        [
          "bore",
          "bore"
        ],
        [
          "oil well",
          "oil well"
        ],
        [
          "underground",
          "underground"
        ],
        [
          "undersea",
          "undersea"
        ]
      ],
      "qualifier": "oil industry",
      "raw_glosses": [
        "(oil industry) Located in the drilled bore of an oil well either underground or undersea."
      ],
      "synonyms": [
        {
          "word": "down-hole"
        }
      ]
    }
  ],
  "word": "downhole"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "down",
        "3": "hole"
      },
      "expansion": "down- + hole",
      "name": "prefix"
    }
  ],
  "etymology_text": "down- + hole",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective"
      },
      "expansion": "downhole",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms prefixed with down-",
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "en:Oil industry"
      ],
      "examples": [
        {
          "ref": "2005, Paul Carter, Don't Tell Mum I Work on the Rigs, Crows Nest: Allen and Unwin, page 44",
          "text": "In the work over, part of the new \"string\" was a down-hole titanium gauge.",
          "type": "quotation"
        },
        {
          "ref": "2015, Ronald DiPippo, Geothermal Power Plants",
          "text": "Pressure readings are taken downhole next to the feed zone and the total flow is measured on the surface using a separator.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Located in the drilled bore of an oil well either underground or undersea."
      ],
      "links": [
        [
          "bore",
          "bore"
        ],
        [
          "oil well",
          "oil well"
        ],
        [
          "underground",
          "underground"
        ],
        [
          "undersea",
          "undersea"
        ]
      ],
      "qualifier": "oil industry",
      "raw_glosses": [
        "(oil industry) Located in the drilled bore of an oil well either underground or undersea."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "down-hole"
    }
  ],
  "word": "downhole"
}