Reducing dual tubing oil recovery wellhead casing head
A casing head and reducing technology, applied in the field of petroleum exploration, can solve the problems of inconvenient engineering production operation, waste of financial and material resources, low production operation efficiency, etc., and achieve the effects of simple structure, large bearing capacity and improved production efficiency.
Inactive Publication Date: 2015-03-04
JIANGSU SHUANGHUI MACHINERY MFG
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Problems solved by technology
[0002] In the existing oil production wellhead casing head device, each oil production wellhead can only perform oil production operations on the same underground oil layer area during the oil production process, but cannot perform oil production operations on oil layer blocks in two different underground areas at the same time, which leads to The complexity of the oil recovery process and the low efficiency of production operations have brought inconvenience to engineering production operations
Many operating procedures in oil production engineering require the use of large mobile equipment and engineering vehicles. The use of traditional oil production wellhead casing head devices is inefficient and wastes a lot of financial and material resources
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[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0017] like Figure 1-Figure 2 As shown, the embodiment of the present invention provides a different-diameter double-tube oil production wellhead casing head, including two oil pipes 1, a casing head cross 2, a Christmas tree 3, a flat gate valve 4, a threaded flange 5, a pressure A cut-off valve assembly 6 and a throttle valve 7 are shown. The casing head cross 2 is installed and fixed at the port of the Christmas tree 3 through bolts, and the inside of the casing head cross 2 is fixed by a jacking screw assembly 10 provided on its side. There is a different-diameter double-tube hanger 8, and th...
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The invention discloses a reducing dual tubing oil recovery wellhead casing head. The reducing dual tubing oil recovery wellhead casing head comprises two oil pipes, a casing head cross, a Christmas tree, flat gate valves, a screw thread flange, a pressure gauge stop valve assembly and a throttle valve, wherein the casing head cross is connected with the integral flange Christmas tree through bolts, the inside of the integral flange Christmas tree is provided with a reducing dual tubing hanger, the two oil pipes are fixed at the position of the hanger to achieve oil recovery operation of two different areas, the hanger is further provided with a stop unit, and the stop unit has the function of stopping release of a lower portion casing during dismantling well cementation top connecting collars to guarantee underground safe operation. Due to the improvement that the integral flange connected Christmas tree is used for replacing a traditional Christmas tree structure, the overall sealing performance of the oil recovery wellhead unit is improved, two flat gate valves are used in parallel, therefore, when one of the gate valves of the integral flange connected Christmas tree is invalid, the other two gate valves can still be closed, and operation safety is improved.
Description
technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a different-diameter double-tube oil production wellhead casing head. Background technique [0002] In the existing oil production wellhead casing head device, each oil production wellhead can only perform oil production operations on the same underground oil layer area during the oil production process, but cannot perform oil production operations on oil layer blocks in two different underground areas at the same time, which leads to The complexity of the oil recovery process and the low efficiency of production operations have brought inconvenience to the engineering production operations. Many operating procedures in oil production engineering require the use of large mobile equipment and engineering vehicles. The use of traditional oil production wellhead casing head devices is inefficient and wastes a lot of financial and material resources. Contents of the i...
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IPC IPC(8): E21B33/047E21B43/14
CPCE21B33/047E21B43/14
Inventor 于冬李宏朱国亚
Owner JIANGSU SHUANGHUI MACHINERY MFG