CN-121988657-A - Pit pressing tool matched with pit type connector and pit manufacturing device

CN121988657ACN 121988657 ACN121988657 ACN 121988657ACN-121988657-A

Abstract

The invention discloses a pit pressing tool and a pit manufacturing device matched with a pit type connector, wherein the pit pressing tool comprises a pit pressing body, a driving mechanism, a plurality of piston assemblies and an extrusion piece; the pit pressing body is detachably connected to the outer side of the continuous pipe, a plurality of piston assemblies are uniformly arranged in the circumferential direction of the pit pressing body, each piston assembly comprises a piston cylinder and a piston body, a first end of each piston cylinder is connected to the outer side of the pit pressing body, an opening is formed in the first end of each piston cylinder, a piston body is slidably arranged in an inner cavity of each piston cylinder, the first end of each piston body is connected with an extrusion piece, the first end of each piston body and the extrusion piece extend out of the opening, the extrusion pieces can be abutted to the continuous pipe, the piston bodies are connected with a driving mechanism, and slide towards the direction of the continuous pipe under the action of the driving mechanism so that the extrusion pieces extrude the outer surface of the continuous pipe, and the extrusion pieces are matched with the pit connectors to form pits. The quality and the precision of continuous pipe pit pressing are effectively improved, and the working efficiency is improved.

Inventors

LV WEIPING
LIU XIXIONG
FU YUE
ZHANG YAN
REN BIN
XIN YONGAN
ZHU YE
JIA XIA
CHEN ZHI
ZHANG ZHENG

Assignees

中国石油天然气集团有限公司
中国石油集团工程技术研究院有限公司
中石油江汉机械研究所有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (10)

1. A pit pressing tool matched with a pit type connector is characterized by comprising a pit pressing body, a driving mechanism, a plurality of piston assemblies and at least one extrusion piece; the pit pressing body is detachably sleeved on the outer side of the continuous pipe, and a pit connector is nested in the inner cavity of the continuous pipe; A plurality of piston assemblies are uniformly arranged in the circumferential direction of the pit pressing body; The piston assembly comprises a piston cylinder and a piston body; the first end of the piston cylinder is connected to the outer side of the pit pressing body, and an opening is formed in the first end of the piston cylinder; the inner cavity of the piston cylinder is provided with the piston body in a sliding manner; a first end of the piston body is connected with the extrusion piece; The extrusion being capable of extending out of the opening and abutting the coiled tubing; the piston body is connected with the driving mechanism, and can slide towards the direction of the continuous pipe under the action of the driving mechanism, so that the extrusion piece extrudes the continuous pipe and is matched with the pit type connector on the outer surface of the continuous pipe to form pits.
2. The pit pressing tool of claim 1, wherein the drive mechanism comprises a hydraulic pump; The piston assembly further comprises a cylinder cover, a pressing cap and a joint; The cylinder cover is arranged at the second end of the piston cylinder so as to limit the piston body to the inner cavity of the piston cylinder; The two ends of the pressing cap are respectively connected with the cylinder cover and the joint; The inner cavity of the joint is communicated with the inner cavity of the cylinder cover; The connector is connected with the hydraulic pump, and can convey high-pressure liquid generated by the hydraulic pump to the inner cavity of the cylinder cover, so that the high-pressure liquid acts on the piston body and drives the piston body to slide.
3. The dimple pressing tool according to claim 2, wherein first screw holes are provided in the circumferential direction of the dimple pressing body at positions corresponding to the piston cylinders, the number of the first screw holes being identical to the number of the piston cylinders; the first threaded hole is provided with a first step; the outer side wall of the first end of the piston cylinder is provided with an external thread, and the first end of the piston cylinder is provided with a second step; The first end of the piston cylinder is in threaded connection with the first threaded hole, and the first step is abutted with the second step.
4. A dimple pressing tool according to claim 3, wherein the piston assembly further comprises a plug; the plug is connected between the cylinder cover and the pressing cap; the inner cavity of the plug is provided with a fluid channel, and the fluid channel is communicated with the inner cavity of the cylinder cover and the inner cavity of the joint.
5. The dimple pressing tool of claim 4, wherein said piston assembly further includes a resilient member; The inner cavity of the piston cylinder is provided with a first step surface, and the piston body is provided with a second step surface; the elastic piece is arranged between the first step surface and the second step surface.
6. The dimple pressing tool of claim 4, wherein the piston assembly further includes a first seal ring and a second seal ring; A first sealing ring is arranged between the plug and the cylinder cover; And a second sealing ring is arranged between the plug and the pressing cap.
7. The dimpling tool as in claim 1, wherein the dimpling body comprises a first connector and a second connector; the connecting ends of the two sides of the first connecting piece are respectively provided with a first special-shaped groove and a second special-shaped bulge; The connecting ends at two sides of the second connecting piece are respectively provided with a first special-shaped bulge and a second special-shaped groove correspondingly, the first special-shaped groove is matched with the first special-shaped bulge, and the second special-shaped groove is matched with the second special-shaped bulge; The first connecting piece and the second connecting piece can be axially inserted into each other and sleeved on the outer side of the continuous pipe, and the same side end faces of the first connecting piece and the second connecting piece are flush.
8. The dimple pressing tool of claim 7, further comprising a locking screw; The connecting ends of the two sides of the first connecting piece and the connecting ends of the two sides of the second connecting piece are respectively provided with a second threaded hole, and the second threaded holes penetrate through the connecting positions of the first connecting piece and the second connecting piece; The locking screw is in threaded connection with the second threaded hole.
9. The dimple pressing tool of any one of claims 1-8, further comprising a locating fastener; The pit-type connector is provided with a plurality of concave parts at intervals along the axial direction, and the adjacent concave parts are staggered; The pit-type connector is provided with a positioning part; The pit pressing body is provided with a plurality of positioning holes at intervals along the axial direction, and the adjacent positioning holes are staggered; The positioning fastener may be connected to the positioning portion and any one of the positioning holes such that a position of the corresponding recess corresponds to a position of the pressing piece.
10. A pit making apparatus comprising a pit connector and the pit pressing tool of claims 1 to 9; the pit type connector is nested in the continuous pipe and is detachably connected with the pit pressing body.

Description

Pit pressing tool matched with pit type connector and pit manufacturing device Technical Field The invention relates to the technical field of continuous pipe operation in petroleum industry, in particular to a pit pressing tool matched with a pit type connector and a pit manufacturing device. Background The coiled tubing is a continuous length of seamless steel tubing that is wound around a drum and requires special connectors for connection to other downhole tools or coiled tubing under most operating conditions. There are various connector structures on the market at present, such as screw fastening type, slip type, rolling type, pit type and the like. The pit type inner connector is installed with the continuous pipe by using a matched pit pressing tool, and pits are pressed on the surface of the continuous pipe, so that the pits on the surface of the continuous pipe are attached to the pits on the connector body. Disclosure of Invention In order to effectively improve the quality and the precision of continuous pipe pit pressing and improve the working efficiency, the invention provides a pit pressing tool and a pit manufacturing device matched with a pit type connector. In a first aspect, embodiments of the present invention provide a dimple press tool for mating with a dimple connector, comprising a dimple press body, a drive mechanism, a plurality of piston assemblies, and at least one extrusion; the pit pressing body is detachably sleeved on the outer side of the continuous pipe, and a pit connector is nested in the inner cavity of the continuous pipe; A plurality of piston assemblies are uniformly arranged in the circumferential direction of the pit pressing body; The piston assembly comprises a piston cylinder and a piston body; the first end of the piston cylinder is connected to the outer side of the pit pressing body, and an opening is formed in the first end of the piston cylinder; the inner cavity of the piston cylinder is provided with the piston body in a sliding manner; a first end of the piston body is connected with the extrusion piece; The extrusion being capable of extending out of the opening and abutting the coiled tubing; the piston body is connected with the driving mechanism, and can slide towards the direction of the continuous pipe under the action of the driving mechanism, so that the extrusion piece extrudes the continuous pipe and is matched with the pit type connector on the outer surface of the continuous pipe to form pits. Optionally, the drive mechanism comprises a hydraulic pump; The piston assembly further comprises a cylinder cover, a pressing cap and a joint; The cylinder cover is arranged at the second end of the piston cylinder so as to limit the piston body to the inner cavity of the piston cylinder; The two ends of the pressing cap are respectively connected with the cylinder cover and the joint; The inner cavity of the joint is communicated with the inner cavity of the cylinder cover; The connector is connected with the hydraulic pump, and can convey high-pressure liquid generated by the hydraulic pump to the inner cavity of the cylinder cover, so that the high-pressure liquid acts on the piston body and drives the piston body to slide. Optionally, first threaded holes are formed in the circumference of the pit pressing body and correspond to the positions of the piston cylinders, and the number of the first threaded holes is consistent with that of the piston cylinders; the first threaded hole is provided with a first step; the outer side wall of the first end of the piston cylinder is provided with an external thread, and the first end of the piston cylinder is provided with a second step; The first end of the piston cylinder is in threaded connection with the first threaded hole, and the first step is abutted with the second step. Optionally, the piston assembly further comprises a plug; the plug is connected between the cylinder cover and the pressing cap; the inner cavity of the plug is provided with a fluid channel, and the fluid channel is communicated with the inner cavity of the cylinder cover and the inner cavity of the joint. Optionally, the piston assembly further comprises an elastic member; The inner cavity of the piston cylinder is provided with a first step surface, and the piston body is provided with a second step surface; the elastic piece is arranged between the first step surface and the second step surface. Optionally, the piston assembly further comprises a first sealing ring and a second sealing ring; A first sealing ring is arranged between the plug and the cylinder cover; And a second sealing ring is arranged between the plug and the pressing cap. Optionally, the pit pressing body includes a first connector and a second connector; the connecting ends of the two sides of the first connecting piece are respectively provided with a first special-shaped groove and a second special-shaped bulge; The connecting ends at two sides of the second