Combined operation method for work modes of walking beam pumping unit

A combined operation method for work modes of a walking beam pumping unit, wherein

• according to the number of theoretical full-stroke pumping N in a cycle T, and based on a case that the following conditions are satisfied:
• T
• =
• ∑
• i
• =
• 1
• n
• ⁢
• ⁢
• 1
• ⁢
• t
• i
• +
• ∑
• i
• =
• 1
• n
• ⁢
• ⁢
• 2
• ⁢
• t
• j
• +
• ∑
• i
• =
• 1
• n
• ⁢
• ⁢
• 3
• ⁢
• t
• k
• N
• =
• n
• ⁢
• ⁢
• 1
• +
• ∑
• j
• =
• 1
• n
• ⁢
• ⁢
• 2
• ⁢
• x
• j
• -
• static
• ⁢
• ⁢
• deformation
• ⁢
• ⁢
• length
• ⁢
• ⁢
• of
• ⁢
• ⁢
• elasticity
• travelling
• ⁢
• ⁢
• distance
• ⁢
• ⁢
• of
• ⁢
• ⁢
• polished
• ⁢
• ⁢
• rod
• ⁢
• ⁢
• in
• ⁢
• ⁢
• a
• ⁢
• complete
• ⁢
• ⁢
• cycle
• ⁢
• ⁢
• operation
• -
• static
• ⁢
• ⁢
• deformation
• ⁢
• ⁢
• length
• ⁢
• ⁢
• of
• ⁢
• ⁢
• elasticity
• arranging the number of crank complete-cycle operation times n1, times of respective complete-cycle operation t1, t2, . . . , tn1, the number of crank incomplete-cycle pumping operation times n2, travelling distances of a polished rod in respective incomplete-cycle pumping operation x1, x2, . . . , xn2, times of respective incomplete-cycle pumping operation t1, t2, . . . tn2, the number of crank incomplete-cycle no-pumping operation times n3, times of respective incomplete-cycle no-pumping operation t1, t2, . . . tn3, and an order of a crank complete-cycle operation, a crank incomplete-cycle pumping operation, and a crank incomplete-cycle no-pumping operation.