CN218206636U

CN218206636U - Fishing spear

Info

Publication number: CN218206636U
Application number: CN202222272039.1U
Authority: CN
Inventors: 史宏伟; 徐延凯; 邢励君
Original assignee: TONGHUA CITY FORWARD PETROLEUM MACHINERY CO LTD
Current assignee: TONGHUA CITY FORWARD PETROLEUM MACHINERY CO LTD
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2023-01-03
Anticipated expiration: 2032-08-29

Abstract

The utility model relates to an oil field workover tool technical field, salvages the lance promptly. The upper joint is connected with a lance, the lower end of the lance is connected with a guide cone, and slips are circumferentially arranged on the lance. The upper joint is connected with the lance through a piston and a hydraulic cylinder; the upper joint is connected with the upper end of the piston by threads and is sealed by an O-shaped ring, and a water hole is used for connecting the piston cavity with the inner cavity of the pipe column; the spear is inserted into the hydraulic cylinder and is connected with the lower end of the piston through threads, and the spear is sealed with the inner cavity of the piston through an O-shaped ring; the spring is sleeved on the lance in the hydraulic cylinder and is positioned between the piston and the outer cylinder; the end cover is connected to the lower end of the hydraulic cylinder through threads, and the shoulder of the outer cylinder is blocked in the hydraulic cylinder; the outer sleeve is sleeved outside the lance. The piston, the spring, the hydraulic cylinder and the outer cylinder are combined, so that the hydraulic retreating function is realized, the double-slider fishing spear can be reliably fished in the horizontal well operation, the defect of the conventional double-slider fishing spear is overcome, and the fishing success rate is improved.

Description

Fishing spear

Technical Field

The utility model relates to an oil field workover tool technical field, salvage the lance promptly.

Background

In the prior art, the fishing spear is used for internally fishing tubular falling objects with inner holes and is widely applied to oil field well repairing operation. A typical fishing spear is composed of a top sub 1, a lance 6, a slip 7, a stop key 10, a set screw 11, etc. (see fig. 2). But it can only be salvaged and has no returnable function. Therefore, in the horizontal well fishing operation, the fallen objects which are seriously stuck by sand can not be withdrawn and abandoned in the well, so that new underground accidents are easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the aforesaid not enough and provide a reasonable in structure, have hydraulic pressure can move back the function, salvage effectual trip spear. The problem of slips salvage uncertain and can not withdraw from the fish in horizontal well operation is solved.

The technical solution of the utility model is that: the fishing spear comprises an upper joint, wherein the upper joint is connected with a spear rod, the lower end of the spear rod is connected with a guide cone, and slips are arranged on the spear rod along the circumference; the upper joint is connected with the upper end of the piston by threads and is sealed by an O-shaped ring, and a water hole is used for connecting the piston cavity with the inner cavity of the pipe column; the spear is inserted into the hydraulic cylinder and is connected with the lower end of the piston through threads, and the spear is sealed with the inner cavity of the piston through an O-shaped ring; the spring is sleeved on the lance in the hydraulic cylinder and is positioned between the piston and the outer cylinder; the end cover is connected to the lower end of the hydraulic cylinder through threads, and the outer cylinder shoulder is blocked in the hydraulic cylinder; the outer sleeve is sleeved outside the lance.

The utility model has the advantages that: adopt piston, spring, hydraulic cylinder, urceolus integrated configuration, have simple structure, be suitable for (this application adopts urceolus 5 to act slips 7 and contracts, says advantage), realize that hydraulic pressure can move back the function, make the double block drag for the lance and salvage reliably in horizontal well operation, overcome the defect that conventional double block dragged for the lance, improved and salvaged the success rate.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic diagram of a prior art double-slider fishing spear.

Detailed Description

Referring to fig. 1 and 2, the names of the components are as follows: the hydraulic pressure type pipe fitting comprises an upper connector 1, a piston 2, a hydraulic cylinder 3, an end cover 4, an outer cylinder 5, a lance 6, a slip 7, a guide cone 8, a spring 9, an O-shaped ring 10, a set screw 11, a stop key 12 and an overflowing hole 13.

Referring to fig. 1, the fishing spear comprises an upper connector 1, wherein the upper connector 1 is connected with a spear 6, the lower end of the spear 6 is connected with a guide cone 8, and slips 7 are circumferentially arranged on the spear 6. Slips 7 and lances 6 are conventional. The upper joint 1 is connected with a lance 6 through a piston 2 and a hydraulic cylinder 3; the upper joint 1 is connected with the upper end of the piston 2 by threads and sealed by an O-shaped ring 10, a water hole is formed to connect a piston cavity with an inner cavity of a pipe column, and the hydraulic cylinder 3 is pushed to move upwards when needed; the lance 6 is inserted into the hydraulic cylinder 3 and is connected with the lower end of the piston 2 through threads, and an O-shaped ring 10 is used for sealing an inner cavity of the piston 2; the spring 9 is sleeved on the lance 6 in the hydraulic cylinder 3 and is positioned between the piston 2 and the outer cylinder 5 and used for pushing the slips to be in a fishing state; the end cover 4 is connected to the lower end of the hydraulic cylinder 3 through threads, and the outer cylinder 5 is blocked in the hydraulic cylinder 3 through a shoulder; the outer barrel 5 is fitted over the exterior of the lance 6 and serves to push the slips over the lance so that the slips 7 are in a fished or withdrawn condition when required. A guide cone 8 is screwed to the end of the lance 7 for guiding fish and limiting the action of the outer barrel 5.

The working principle is as follows: the fishing spear is the current situation improved instrument to conventional double slide block fishing spear, in horizontal well operation is salvaged, 3 inner spring 9 of fishing spear hydraulic cylinder promote 5 circular beads of urceolus to back of the body cap terminal surface (end cover 4), slips 7 are under the drive of urceolus 5, be in the maximum dimension state (urceolus 5 moves up and drives slips 7 withdrawal), can not meet when the intraductal descending of sleeve pipe and hinder, when down to the fish position, after the inner chamber of fish is introduced to the guide cone 8, the fishing spear continues down, slips 7 meet the hindrance at the oil pipe terminal surface and retract to get into oil pipe, on the whole oil pipe inner chamber that gets into of double slips 7, make and carry double slips 7 and prop up the oil pipe inner wall, can salvage the fish. When the fish can not be lifted out due to serious jamming, the hydraulic cylinder 3 is pressed to be pushed upwards by hydraulic pressure, the back cap drives the outer cylinder 5 to simultaneously move upwards, and the slips 7 move upwards and retract under the drive of the outer cylinder 5 at the moment, so that the fish can be withdrawn. The device has a hydraulic retreating function.

The using method comprises the following steps: and (5) checking the tool, tightening the connecting thread, and lowering the connecting pipe column to the fish top. The fishing spear is continuously lowered, and when the weight indicator needle descends backwards, the pipe column is lifted upwards, and the fallen fish can be caught. If the pipe string is lowered when the clamping is serious, the slip 7 can move along with the hydraulic cylinder 3 to be separated from the conical surface of the spear 6 and lifted for a certain distance, and the pressure is released after the falling object is withdrawn, so that the pipe string is lifted out.

The above description is only for the purpose of illustrating the embodiments of the present invention, and the various illustrations should not be construed as limiting the essential contents of the present invention.

Claims

1. The fishing spear comprises an upper connector (1), the upper connector (1) is connected with a spear (6), the lower end of the spear (6) is connected with a guide cone (8), slips (7) are arranged on the spear (6) along the circumference, and the fishing spear is characterized in that the upper connector (1) is connected with the spear (6) through a piston (2) and a hydraulic cylinder (3); the upper joint (1) is in threaded connection with the upper end of the piston (2), an O-shaped ring is used for sealing, and a water hole is used for connecting the piston cavity with the inner cavity of the pipe column; the lance (6) is inserted into the hydraulic cylinder (3) and is connected with the lower end of the piston (2) through threads, and an O-shaped ring is used for sealing the inner cavity of the piston (2); the spring (9) is sleeved on the lance (6) in the hydraulic cylinder (3) and is positioned between the piston (2) and the outer cylinder (5); the end cover (4) is connected to the lower end of the hydraulic cylinder (3) through threads, and the shoulder of the outer cylinder (5) is blocked in the hydraulic cylinder (3); the outer cylinder (5) is fitted over the lance (6).