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Mechanism for filtering petroleum drilling fluid

A technology of oil drilling and casing, which is applied in the direction of earthwork drilling, flushing wellbore, wellbore/well parts, etc. It can solve the problems of poor screening efficiency and unsatisfactory screening effect, so as to avoid splashing around and ensure filtration effect of effect

Inactive Publication Date: 2015-11-11
CHENGDU LAIBAO PETROLEUM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the defects of poor screening efficiency and unsatisfactory screening effect, the present invention provides a mechanism for filtering oil drilling fluid

Method used

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  • Mechanism for filtering petroleum drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, a mechanism for filtering petroleum drilling fluid includes a casing 1 with a cavity structure, and the casing 1 is divided into a cavity A3 and a cavity B4 by a baffle 2, and also includes a The hydraulic cylinder 5, the first rack 6 connected with the piston rod of the hydraulic cylinder 5, the gear 7 whose lower part meshes with the first rack 6, the second rack 8 which meshes with the upper part of the gear 7, and the second rack 8 which is connected to the The screen A9 on one end surface, the screen A9 passes through the baffle plate 2 and is slidingly arranged in the cavity B4; it also includes a rotating shaft with one end passing through the center hole of the gear 7, and the other end of the rotating shaft is fixed on the inner wall of the cavity A3, and the gear 7 rotates around The shaft is rotatable.

[0018] In this embodiment, the piston rod of the hydraulic cylinder 5 is connected to the first rack 6. When the hydraulic cylind...

Embodiment 2

[0021] On the basis of Embodiment 1, this embodiment also includes a screen cloth B10 arranged below the screen cloth A9, one end of the screen cloth B10 is fixed on the inner side wall of the cavity B4, and the diameter of the screen holes on the screen cloth B10 is smaller than that of the screen cloth. A9 upper sieve hole diameter.

[0022] The screen B10 arranged below the screen A9 can filter the petroleum mud again, and the diameter of the mesh on the screen B10 is smaller than the diameter of the mesh on the screen A9, which can ensure the filtering effect.

Embodiment 3

[0024] In this embodiment, on the basis of Embodiment 1 or Embodiment 2, an opening is opened at the upper end of the cavity B4, and a funnel 11 fixed at the opening is also included.

[0025] The funnel 11 arranged on the cavity B4 is convenient for pouring the petroleum slurry into the cavity B4, and the bell mouth of the funnel 11 prevents the petroleum slurry from splashing around when pouring.

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Abstract

The invention records a mechanism for filtering petroleum drilling fluid, comprising a housing of a cavity structure, a hydraulic cylinder, a first rack, a gear, a second rack, and a sieve A, and a rotary shaft. The housing is divided by a retaining plate into a cavity A and a cavity B. The hydraulic cylinder is disposed in the cavity A. The first rack is connected with a piston rod of the hydraulic cylinder. The lower portion of the gear meshes with the first rack. The second rack meshes with the upper portion of the gear. The sieve A is connected to one end face of the second rack. The sieve A penetrates the retaining plate and is slidably disposed in the cavity B. One end of the rotary shaft penetrates a central hole of the gear, and the other end of the rotary shaft is fixed to the inner wall of the cavity A; the gear can rotate around the rotary shaft; side-to-side movements of the sieve A enable the petroleum drilling fluid to be evenly filtered, and large solid particles are effectively stopped on the sieve A.

Description

technical field [0001] The invention relates to a filter mechanism, in particular to a mechanism for filtering oil drilling fluid. Background technique [0002] The shale shaker for oil drilling is an essential equipment in drilling. The drilling fluid circulated from the downhole to the surface must first pass through the shale shaker to remove solid particles with larger diameters before entering the desander or desilter. , to further reduce the solid phase content in the mud and play a role in mud purification. However, the traditional vibrating screen has a large screen body and poor screening efficiency, which has an adverse effect on the sieved particles after screening and the processing capacity of the vibrating screen. Contents of the invention [0003] In order to solve the defects of poor screening efficiency and unsatisfactory screening effect, the present invention provides a mechanism for filtering oil drilling fluid. [0004] Technical scheme of the presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/06
Inventor 谭正怀
Owner CHENGDU LAIBAO PETROLEUM EQUIP
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