Wellhead cable protection device and method for tripping operation of oil submersible cable

A technology for submersible cables and tripping drilling, which is applied in drilling equipment, drill pipes, drill pipes, etc., can solve the problems of cable elevator extrusion, deformation, insulation damage, etc., to ensure stability, avoid stranded wires, Avoid scratching effects

Active Publication Date: 2021-01-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are potential hidden dangers that the cable will be squeezed, deformed, or even damaged by the elevator at the wellhead during the tripping operation.

Method used

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  • Wellhead cable protection device and method for tripping operation of oil submersible cable
  • Wellhead cable protection device and method for tripping operation of oil submersible cable
  • Wellhead cable protection device and method for tripping operation of oil submersible cable

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0049] Such as figure 1 As shown, center the connection base 2 of the wellhead cable protector for the tripping operation of the submersible cable on the lower flange of the wellhead of the oil well, and install the bolts in the eight bolt holes 3 of the connection base 2 to fix the support body 5 on the wellhead superior. When lifting and unloading the oil pipe, the cable is tightened along the outer side of the rolling shaft 4 to ensure that the speed of the cable and the oil pipe are synchronized. When loading and unloading the oil pipe, the elevators are placed on the support platform 1 of the cable protector to prevent the elevator from damaging the cable. Wherein, the middle part of the cutout 6 is provided with an outwardly extending lug 7, and the rolling shaft 4 is detachably set through the lug 7; the constraining shaft 9 is correspondingly fixed on the lug 7 on the same side through the connecting end plate.

example 2

[0051] Such as figure 2 As shown, the support body 5 is symmetrically provided with grooves 8 located on both sides of the middle part of the cutout 6, a connecting wall is formed between the groove 8 and the cutout 6, the rolling shaft 4 is detachably set through the connecting wall, and the restraining shaft 9 is connected through the The end plates are correspondingly fixed on the connecting wall on the same side; other structures are the same as in Example 1.

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Abstract

The invention discloses a wellhead cable protection device and method for tripping operation of an oil submersible cable. The cable protection device comprises a support body, a rolling shaft and a constraint shaft; the support body is in a hollow cylindrical shape, and the side wall of the support body is provided with a notch along a generatrix; and the lower end of the support body is fixed toa wellhead, and an elevator for loading and unloading an oil pipe is arranged at the upper end of the support body. The rolling shaft and the constraint shaft detachably penetrate through the middle of the notch and are arranged in parallel in the radial direction of the support body. During the tripping operation of the oil submersible cable, the rolling shaft is arranged between the cable and the oil pipe in a penetrating and sleeved mode, and the cable is arranged between the rolling shaft and the constraint shaft in a penetrating and sleeved mode, so that the cable bypasses the elevator and then is doubled with the oil pipe. Positioning arrangement of the elevator is achieved through the arranged support body, the oil pipe and the cable are separated in cooperation with the rolling shaft on the notch, and therefore the cable cannot be clamped and damaged when the elevator is installed; the cable can bypass the elevator while being synchronous with the oil pipe, meanwhile, the cableis limited in cooperation with the constraint shaft, it is guaranteed that movement of the cable cannot deviate, and meanwhile, knotting and outward moving are avoided.

Description

technical field [0001] The invention belongs to the oil recovery technology of the petroleum and natural gas industry, and relates to a wellhead cable protector, in particular to a wellhead cable protector and a cable protecting method for tripping and tripping operations of submersible oil cables. Background technique [0002] With the rise of water cut in oilfields, the deepening of pump hangers and the increase of wells with special trajectory, the problem of eccentric wear of rods and tubes in oil production with rod pumps has become more and more serious. Secondly, too many transmission links, overcoming the weight and elastic deformation of the sucker rod itself will consume a part of power, which will eventually lead to a decrease in the efficiency of the rod pump system of the pumping unit, an increase in maintenance workload, and an increase in the cost of crude oil extraction. [0003] In the prior art, there is a new type of oil production method that does not req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03E21B17/10E21B33/068
CPCE21B33/03E21B17/1085E21B33/068Y02A30/14
Inventor 杨海涛辛宏王亚慧李佰涛张磊魏韦呼苏娟
Owner PETROCHINA CO LTD
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