Leaves government service and joins Anglo-Persian as a technical adviser during a period of major expansion.
Historical person
John Cadman Biography
Historical biography and chronological timeline for John Cadman, based on 34 World History Database records associated with Great Britain.
Chronological biography
1921
Helps negotiate a compromise with Standard Oil interests over participation in Persian petroleum ventures.
1922
Becomes a director as Anglo-Persian strengthens its technical and managerial organization.
1924
Undertakes consultations in Persia aimed at centralizing and clarifying management of Anglo-Persian's local operations.
1925
Becomes vice-chairman and gains greater responsibility for Anglo-Persian strategy and organization.
1926
The original Maidan-i-Naftun producing field is formally identified as Masjed Soleyman.
Annual production at the original Persian field rises above four and a half million long tons.
1927
Anglo-Persian discovers the Naft-e Shah field in western Persia, extending production beyond Masjed Soleyman.
Is elected chairman after returning from discussions with the newly crowned Reza Shah.
1928
Anglo-Persian discovers oil at Gachsaran during its expanding exploration programme in southwestern Persia.
Anglo-Persian discovers the large Haft Kel field, which becomes a major new source of Persian crude.
Joins other major oil companies in an international agreement intended to limit destructive competition and balance supply.
Anglo-Persian and Shell interests create a joint distribution structure for markets across Africa and the Middle East.
1929
A pipeline from Haft Kel is connected near Ahvaz to the main route carrying crude toward Abadan.
1930
Abadan refinery capacity reaches roughly one hundred thousand barrels per day after sustained expansion.
Haft Kel production reaches roughly twenty thousand barrels per day as the field becomes a major producer.
Combined production from major Persian fields reaches roughly one hundred twenty-five thousand barrels per day.
More than twenty thousand people are employed by Anglo-Persian in Persia as production and refining expand.
1931
Falling oil prices and the global depression sharply reduce royalties paid to the Persian government.
Company production reaches 5,730,498 long tons despite the global petroleum market downturn.
1932
Company output increases to 6,445,808 long tons while the concession dispute remains unresolved.
The British government refers the Anglo-Persian concession dispute with Persia to the League of Nations.
1933
Accepts a reduced concession area of one hundred thousand square miles under the 1933 settlement.
Secures a sixty-year concession running to 1993, extending company rights well beyond the original D'Arcy term.
Agrees to sell petroleum for internal Persian consumption at specially favourable prices.
Accepts a guaranteed minimum annual payment of seven hundred fifty thousand pounds to the Persian government.
Accepts a formal arbitration procedure for future disputes between the company and the Persian government.
Agrees to make annual payments in lieu of Persian income tax under the new concession.
Company production reaches 7,087,000 tons and payments to Persia total about 1,785,000 pounds.
Agrees to provide an annual grant for professional education of Persian nationals in the petroleum industry.
Signs a new concession replacing the 1901 D'Arcy agreement after negotiations with the Persian government.
1934
Haft Kel produces more than two million tons annually as Anglo-Persian expands after the new concession.
Registers the Kermanshah Petroleum Company as a subsidiary for development of the Naft-e Shah region.
1935
Renames the company Anglo-Iranian Oil Company after Persia formally adopts Iran as its international name.
Titles and roles
Chairman APOC ยท Company Director ยท Technical Adviser APOC ยท Vice-Chairman APOC
Record provenance
This biography is assembled from World History Database records filtered by country and personal-name fields. Exact duplicate display records are removed. The database is an index rather than a complete narrative biography; formal research should verify entries against relevant primary or specialist sources.